altair_8800b

5-34. RESISTOR INSTALLATION NOTE (Figure 5-27) Save any excess resistor leads for ferrite bead Install the following 46 resistors installation in Paragraph (Bags 3 and 4) on the CPU Board ac- 5-38. cording to the Resistor Installation Instructions given on page 5-6. Resistor Values ( ) R3-R7, R11, R13, R14, R19, R20, R24, R25, R28-R33, R39-R43, R50 2.2K ohm (red, red, red) 1/2W or 1/4W ( ) R1, R2, R8, R26, R27, R37, R38, 3.3K ohm (orange, orange, red) 1/2W or 1/4W R44-R49 ( ) R9 15K ohm (brown, green, orange) 1/2W or 1/4W ( ) R16 lK ohm (brown, black, red) 1/2W or 1/4W ( ) R34 620 ohm (blue, red, brown) 1/2W ( ) R10 330 ohm (orange, orange, brown) 1/2W or 1/4W ( ) R21, R23 470 ohm (yellow, violet, brown) 1/2W or 1/4W ( ) R17 10K ohm (brown, black, orange) 1/2W or 1/4W ( ) R22 10 ohm (brown, black, black) 2W ( ) R15 100 ohm (brown, black, brown) 1/2W or 1/4W 119 , 'OlliLi I. -t::J- \" ~.... ;-:t;=::;r:-r 1116 IIt7 o ...... ~ ~oo'\" \"0 o p, 00 5-38 5-27. CPU Resistor Installation April. 1977 8800b

5-35. SUPPRESSOR CAPACITOR IN~ Suppressor Capacitor Values STALLATION (Figure 5-28) ( ) 13 di pped 1uf, 35V ~here are two types of suppressor tantalum capacitors to be installed on the CPU Board. The first type, the ( ) 20 ceramic disk .1 uf, 12V epoxy dipped tantalum capacitors (Bag 6), are blue on the positive side and are spherical in shape. Be sure to orient the blue side to the 11+\" sign Qn the silkscreen before installing each capacitor. The remaining suppressor capacitors are ceramic disk capacitors (Bag 5). They need no polarity orientation. Install both types of capacitors according to the Epoxy Dipped Tantalum and Ceramic Disk Capacitor Installation Instructions given on page 5-7. ___ R37 ov , 0+ . . . . . . R38 _ _ _ R39 _ _ _ fMC) 5-28. CPU Suppressor Capacitor Installation Apri1, 1977 5- 39 8aOCb

5-36. CAPACITOR INSTALLATION NOTE (Figure 5-29) When installing the dipped tantalum and the electro- There are 2 dipped tantalum capaci- lytic capacitors, be sure tors, 6 electrolytic capacitors, 2 . the positive lead is in- ceramic disk capacitors, and 3 dipped ceramic capacitors (Bag 6) stalled in the \"+\" hole on to be installed on the CPU Board. Install each capacitor according to the s;lkscreen. the-instructions given on page 5-7. ( ) Cl , CS, C6, Cll Capaci tor Values ( ) C2 33uf, l6V, electrolytic ( ) C3, C7, C10 22uf, l6V, dipped tantalum ( ) C4 .luf, SOY, dipped ceramic 10uf, l6V, dipped tantalum ( ) ca, C12 .1 uf, l2V - l6V, ceramic disk 10uf, 25V, electrolytic ( ) C9, C13 o, E, ---c=]IS\" I~ R9 ~, I 5-29. CPU Capacitor Installation 5-40 Apr; 1. 1977 a300b

5-37. DIODE INSTALLATION Fi ure Diode Part Numbers 5-30 ( ) 01 1N4730 ~1nsta11 the two diodes, D1 and D2 (Bag 4), on the CPU Board according ( ) D2 1N4733 to the Diode Installation Instruc- tions given on page 5-8. 5-30. CPU Diode Installation April. 1977 5-41 8800b

5-38. FERRITE BEAD INSTALLATION 2. Insert the lead through the (Figure 5-31) bead, and bend the ends so they conform to the desig- Install the 7 ferrite beads, Ll nated holes on the CPU Board. through L7 (Bag 7 ), on the CPU Board according to the following 3. Insert the leads into the instructions. board, and solder to the foil 1. Using the resistor leads saved (bottom) side of the board. Be careful not to leave any from Paragraph 5-34, cut seven solder bridges. l-inch lead lengths. 4. Clip off any excess lead lengths. e: , +. , R,+e\", .. s ,~ 1120 _11-I *, 'IVI' ~ &! e+ x I RR302_9_- -_' - R31 _ _ _ R32 _ _ _ ,R211 ~ y ~R33 ~I .+ ~ '~\".'j.'JI·~ 5-31. CPU Ferrite Bead Installation 5-42 April, 1977 8800b

5-39. VOLTAGE REGULATOR INSTALL- ATION (Figure 5-32) ~Install the two voltage regulators, . # 6 - 3 2 X 3/8 11 VRl and VR2 (Bag 2), and heat sinks on the CPU Board according to the I following instructions. I I 1. Set the regulator in place on the silk-screened side of the ~--MC7e05 board, aligning the leads with their designated holes. 2. Use needle-nose pliers to bend each of the three leads at a right angle to conform to its proper hole on the boa~d. NOTE Use heat sink grease when installing this component. Apply the grease to all metal surfaces which come in contact with each other. 3. Referring to Figure 5-32, set #6-32 # 6 - -. . . the regulator and heat sink _ in place on the silk-screened side of the board. Secure them in place with a'#6-32 x 3/8\" screw, a #6-32 nut, and a #6 lockwasher. 4. Solder the three leads to the foil (bottom) side of the board. Be sure not to leave any solder .bridges. 5. Clip off any excess lead lengths. Voltage Regulator Part Numbers ( ) VRl 7805 ( ) VR2 7812 5-32. CPU Voltage Regulator Installation April. 19i7 5-43 8800b

5-40. TRANSISTOR INSTALLATION 1. Orient the connector as shown in (Figure 5-33) Figure 5-33, with the bent pins pointing toward the top of the Install the three transistors, Q1 board. through Q3 (Bag 4 ), on the CPU Board according to the Transistor 2. Insert the short pins into the Installation Instructions given 10 designated holes on the si1k- on page 5-8. screened side of the board. Transistor Part Numbers 3. Solder each pin to the foil (bottom) side of the board. Be ( ) Q1, Q2, Q3 2N4410 or CS4410 sure not to leave any solder bridges and clip off any excess NOTE lead lengths. The 10-pin Male Connector (P1) may already be installed 4. The arrow on the si1kscreen on the CPU board. If so, dis- points to Pin #1. After in- regard the following instruc- stalling the male connector, tions. clip off pin #2 of the connec- 5-41. MALE CONNECTOR INSTALLATION tor. This is done for keying purposes. Further keying in- (Figure 5-33) structions are given on page Install one 10-pin Male Connector, 5-75. Pl (Bag 7), on the CPU Board ac- cording to the following instruc- ~nl tions. 5-33. CPU Transistor and Male Connector Installation 5-4.1 ft.pri1, 1977 8800b

5-42. CRYSTAL INSTALLATION Fi ure CAUTION 5-34 - Ins ta11 one 18.00000 MHz crys ta1, Make sure the crystal case XTAL (Bag 7), on the CPU Board does not come in contact according to the following instruc- with any of the tracks on tions. the CPU Board. 1. Referring to Figure 5-34, set Crystal Part Number the crystal in place on the ( ) XTAL l8.00000MHz silk-screened side of the CPU board, aligning the two leads ---2 with their respective holes. .... 1.1 2. Using needle-nose pliers, bend each lead at a right angle to < conform to its respective hole on the board. Insert the leads :! so that the crystal is resting flat on the board on the square \". labelled \"XTAL\". 'iD-.•... 3. Solder the two leads to the foil (bottom) side of the board. •+ Be sure not to leave any solder bridges. ~+. __ f. Clip off any excess lead lengths. 18. 00000 ~1Hz .--- XTAL . - -90· Bend Apri 1, 1977 5-34. ' CPU Crystal I:is:allation' 8800b 5-45

5-43. IC SOCKET AND IC INSTALLATION Silkscreen IC Part Socket (Fi gure 5-35) DesignatioJ\"! Number Size 8212 24-pin ICs A, K, and r4 (Bag 1 ) wi 11 be in- ()K 8080 40-pin stall ed at thi s time. ICs Kand.M ( )M 4009 should be installed, with sockets, ------ according to the IC Installation ( )A Instructions, Section B, on page 5-10. IC A should be installed (without a socket) according to the IC Installation Instructions, Section A, on page 5-10 •. WARNING~ I ICs A and Mare MOS static- sensi ti ve ICs. See the liMOS IC Special Handling Precau- ti ons II on page 5-11 before installing these ICs. o, '1RZ .+'II' >: _.+ I I 5-46 ___ R37 ___ R38 ___ R39 ~IMO 5-35. CPU IC Socket and IC Installation April, 1977 380Gb

5-44. POWER SUPPLY BOARD ASSEMBLY 5-46. RESISTOR INSTALLATION 5-45. CAPACITOR INSTALLATION (Figure 5-36) (Figure 5-36) Install the 2 resistors, Rl and R2 Install the 4 electrolytic capacitors, (Bag 1), on the Power Supply Board Cl through C4 (Bag 3), on the Power according to the Resistor Install- Supply Board according to the Capa- ation Instructions given on page citor Installation Instructions given 5-6. on page 5-7. Resistor Values Capacitor Values ( ) Rl and R2 180 ohm (brown, ( ) Cl through C4 2200uf,. 25V, gray, brown) 1/2W electrolytic ~+ ~ I ~ RZ~$ - - L[----J~ 5~36. Power Supply Capacitor and Resistor Installation April, 1977 5-47 880Gb

5-47. DIODE INSTALLATION (Figure Diode Part Numbers 5-37) ( ) Dl and D2 IN4746 Install the 2 diodes, Dl and D2 (Bag 1), on the Power Supply Board according to the Diode Installation Instructions given on page 5-8. ~ + .., -:p- F==========I I ~ R1 -<:ED:I>- \" L[----J~ 5-37. Power Supply Diode !nstallatiJ~ 5-48 April. 1977 8S00b

5-48. TRANSISTOR INSTALLATION 4. Solder the three leads to the (Figure 5-38) foil (bottom) side of the board. Be sure not to leave any solder --- Install the two transistors, Q1 and bridges. Q2 (Bag 1), mica insulators, and heat sinks on the Power Supply Board 5. Clip off any excess lead lengths. according to the following instruc- tions. Transistor Part Numbers 1. Set the transistor in place on the si l·k-screened side of the ( ) Ql TIP145 or TIP146 board, aligning the leads with their designated holes. ( ) Q2 TIP140 or TIP141 2. Use needle-nose pliers to bend each of the three leads at a Hylon ,---#4-40 X 3/811 right angle to conform to its proper hole on the board. Shoulder Washer \" ' ' ' - - - Me 7805 NOTE Use heat sink grease when HEAT ~!J}f.~I~:-_.,...~lica i nsta11 i nq thi s· component. Insulator Apply the grease to all SINK surfaces which come in contact with each other. #6--. # 6 - 3 2 - -_ _ NOTE According to supply varia- 5-38. P~wer Supply Transistor Installation tions, your kit may contain 5-49. either two #6-32 x 3/8\" nylon screws (Bag 5), or two #4-40 x 3/8\" metal screws (Bag 5) to be used when installing transistors Ql and Q2. If your kit contains metal screws, two fiber shoulder washers (Bag 5) must be used along with the screws. To in- stall the fiber shoulder washers, refer to Figure 5-38. 3. Referring to Figure 5-38, set the transistor, mica insulator, and heat sink in place on the silkscreened side of the board. Secure them in place with a #6-32 ~ 3/811 screw, a #6 lock- washer and a #6-32 nut (Bag 5). April, 1977 880Gb

5-49. BRIDGE RECTIFIER INSTALLA- 4. Insert the four leads from the TION (FiQure 5-39) bridge rectifier through the pro- per holes on the Power Supply Install one bridge rectifier, BR2 Board until the legs of the heat (Bag 1), on the Power Supply Board sink rest on the board. according to the following instruc- tions. 5. Holding the heat sink in place, turn the board over and bend the WARNING~ four leads slightly outward. Solder the leads to the foil It is essential that the (bottom) side of the board and bridge rectifier be oriented clip off any excess lead lengths. correctly, so that the \"+\" lead or red dot corresponds Bridge Rectifier Part Number with the \"+\" hole on the· Power Supply Board. ( ) BR2 KBPC802 NOTE . '$6-32 X1/2i' SCREW Use heat sink grease when installing this component. HEAT SINK Apply the grease to the bridge rectifier and the BRIDGE heat sink where they come RECTIFIER in contact with each other. ~6HEX NUT~ 1. Orient the bridge rectifier and the heat sink as shown in Figure I 5-39. Note that the mounting hole in the heat sink is not 5-39. Pry1~r S~~nly centered, but is closer to one Bridge Rectifier Installation end. Make sure you orient the 11+11 lead of the rectifier under the wider end of the heat sink, as shown. 2. Attach the heat sink to the bridge rectifier, using a #6-32 x 1/2\" screw and a #6 hex nut (Bag 5). 3. Orient the heat sink and recti- fier assembly correctly over the board, as shown in Figure 5-39. When you have the proper alignment, the wider end of the heat sink will be pointing to- ward the right side of the Power Supply Board, and the 11+11 lead will be going into the 11+11 hole. 5-50 April, 19i7 88COb

5-50. TERMINAL BLOCK INSTALLATION #6-32 X 9/16 11 (Figures 5-40 through 5-42) or #6-32 x 5/8 11 %. Install the terminal block, TB1 (Bag 2), on the Power Supply Board screw ~~.& according to the following instruc- tions. #6 lockwasher 1. Remove the five #6-32 x 1/411 ~-- #6 nut screws shown in Figure 5-40 ~-- from the terminal block. 2. Set the terminal block in place 5-41. Power Supply Terminal Block on the silk-screened side of the Screw Insertion Power Supply Board. Link 3. Secure the terminal block onto the board by inserting nine #6-32 x 9/16 11 or #6-32 x 5/811 screws, nine #6 lockwashers, and nine #6 nuts (Bag 5) into the proper holes as shown in Figure 5-41. 4. Insert 1 shorti ng 1ink (Bag 2 ) over the lower portion of terminals 7 and 8, and 1 short- ing link over the upper portion of terminals 8 and 9. Secure in place with four #6-32 x 1/4\" screws (Figure 5-42). 5 •1Ieft •9G~~,IQ)!=I f. / G'~r:I, 0IjI~~)IIS2; ~I B 01d(-- 01 G ~I ; .~ --./ 5-40. Power Supply Terminal Block 5-42. Power Supply Terminal Block Screw Removal Shorting Link Insertion April, 1977 5-51 880Gb

5-51. MOUNTING POWER SUPPLY BOARD 4. Fasten the board into place ONTO CROSS MEMBER (Figure 5-43) py inserting another screw There are four or five holes on the into each spacer from under- Power Supply Board to be used in neath the Cross Member. mounting the board to the Cross Member at the back of the main frame. NOTE Five 3/4\" threaded spacers (Bag 5) Before mounting the Power and ten #6-32 x 3/8\" screws (Bag 5) Supply Board, make a gr~und will be used in this procedure. connection between termlnal Refer to Figure 5-43 and the follow- #9 on the terminal block ing instructions for mounting the and the lower, right-hand board to the Cross Member. mounting screw on the cross 1. Insert one screw into each member. Use a 3-inch piece of wire braid with solder mounting hole on the board 1ugs at each end. (In- from the silk-screened side. structions for preparing 2. Put a spacer on each screw the wire braid are detailed and tighten it down. in Paragraph 5-72. 3. Rest the board on the Cross Member so that the spacers are aligned with the mount- ing holes. #6-32 X 3/8\" screw ~ #6-32 X 3/8\" screw 3/4\" threaded spacer Power Supply Soard 5-52 Mounting to Cross Member Aprii. 1977 880Gb

5-52. :cording to supply variations, #6-32 X 3/8 11 Capacitor -your kit may contain either one screw . capacitor (varying from 80,OOOuf - lOO,OOOuf, l5V - 25V) or two capa- #6-32 nut citors (varying from 40,OOOuf - SO,OOOuf, l5V - 25V) to be mounted (A) on the Cross Member. Figure 5-44 . shows the proper placement for one g~ capacitor. Figures 5-45A and 5-458 I~ ~ show the proper placement for two ---1 ,#6-32 X 3/811 Capacitor capacitors. The capacitor(s) are screw mounted in clamps using a #6-32 x 3/811 screw and a #6-32 nut (Bag 5). Clamp Install the capacitor(s) according to the following instructions. 1. Secure the capacitor in the clamp with a #6-32 x 3/8\" screw and orient the capa- ~itor as shown in figure. 2. Place the clamp and capacitor on the Cross Member, aligning the mounting holes. Jr. Secure the clamp to the Cross Member using three #6-32 x 3/811 screws and ·three #6-32 nuts. #6-32 X 3/811 Capacitor screw ----.1 I ,06-32 nut (B) 5-44. Power Supply Capacitor and Clamp 5-45. Power Supply Capacitor and Clamp Installation (For One Capacitor) Installation (For Two Capacitors) Page 5-53

5-53. BACK PANEL ASSEMBLY (Figure Before beginning the back panel 5-46) assembly, remove the back panel from the mainframe and remove the The instructions for the assembly mainframe from the case bottom. of the Altair 8800b back panel are Set aside the mounting screws, as divided into the following sections: they will be replaced later in the assembly procedure. Procedural Instructions Capacitor Wi ri ng To aid with the assembly of your Bridge Rectifier Installation unit, a view of a correctly assem- I/O Connectors bled back panel is shown below in Fan Mounting Figure 5-46. Fuse and Fuse Holder AC Power Cord Trans former Back Panel Mounting Figure 5-46. Completed Back Panel Assembly Page 5-54

5-54. PROCEDURAL INSTRUCTIONS (Figures 5-47 through 5-49). Some of the terms and procedures 5-56. Wire Preparation. Before any that are repeatedly called out in wire is used in an assembly step, it the Back Panel Assembly Instructions should be prepared as follows: will be explained in detail in Paragraphs 5-55 through 5-58. (The 1. Cut the desired length of wire. experienced kit builder who is al- ready familiar with these procedures 2. St ri p 1/8 11 to 1/4 11 0 f ; ns u1a- may wish to skip to Paragraph 5-59.) tion off the ends. 5-55. Terminal Ends. There are 3. Tin the exposed portion of the five different sizes of terminal wire by applying a thin coat of ends used in the wiring of the back solder. panel. The sizes are shown in Figure 5-47. Refer to this figure whenever a terminal end size is called out in the assembly instruc- tions. I SIZE BAG # TERMINAL END WIRE GAUGE SCREW SIZE ~ I IA I 2 I 12-10 I slip on \\. ,i I I II , B 2 I, .:_(5 I 22-18 #6 screw ! I . , I I 2 I r~c; 12-10 I #6 screw CI D I' 2 I (SI I I 12-10 #10 screw I i I ! 2 8 9 12-10 #10 screw E Fi gure 5-47. Termi\"na1 End Sizes Apr; 1, 1977 5-55 8800b

5-57. Attaching Terminal Ends to 2. Insert the exposed portion of a Wires. Most of the wire wire you have prepared into the terminal end and apply solder connections in the Back Panel Assem- until there is a solid connec- bly Instructions call for attaching ti on. a terminal end to a wire and mount- ing it to the proper terminal. 3. After the wire has been soldered This procedure is detailed below: in place and the joint has cooled, cut a l-inch piece of For terminal end sizes A through D: heat shrink tubing and place it over the terminal end. Use a 1. Insert the exposed portion of a heat gun, if available, or a wire that you have prepared into match to shrink the tubing. the correct size terminal end as CAUTION shown in Figure 5-48. Terminal ends become extremely hot during soldering. Allow 2. Heat the wire and terminal end five minutes cooling time with a soldering iron. Apply after soldering before touch- solder to the heated wire, al- ing the terminal ends. lowing the solder to flow until there is a solid solder connec- Heat Shrink tion. (if used) ~ NOTE Terminal End If the insulator on the terminal end loosens during ~Wire soldering, be sure to push it all the way back in place ~\" ~ when solderina is completed. \\I'?- NOTE Figure 5-48. Terminal End Attachment Be sure to hold A size ter- April. 1977 minal ends vertically (with 8800b the wire down) while soldering to prevent solder flowing onto the sliD-on tabs. For terminal end size E: Size E terminal ends do not have insulators, and therefore must be insulated with heat shrink tubing. The procedure for attaching E size terminals ends varies slightly, as foll ows: 1. Set the E size terminal end on the work surface and heat it with a soldering iron until it is hot enough to allow solder to flow. 5-56

5-58. Connector Pins and Connector 4. Commoning tabs may be put into Sockets. Some of the wire the pin housing over pins that 'nnections in the back panel as- must be shorted together. Push ~mbly instructions call for con- the commoning tabs all the way nector pins and connector sockets to the base of the pin housing, housed in a plastic plug. The general procedure for preparing using the tip of a small screw- these plug(s) is detailed below: driver. 1. Insert the exposed portion of Connector a wire that you have prepared Wire Pi n into a connector pin or con- nector socket as shown in ~ Wire Figure 5-49A. 2. Crimp the 1ower portion of the ~IIs·L pin or socket around the wire ~IIIL~ . -\"'V8 insulation. Solder the center portion of t~e pin or socket Connector Socket to the exposed portion of the wire. Figure 5-49A. Connector Pin'and 3. Insert the pins and sockets into Connector Socket Wire Insertion their respective housings as shown in Figure 5~49B. Connector Pin (Connector Socket Commoning Figure 5-49B. Pin and Socket Housing Assembly Aori 1 t 1'::ii 5-57 8800b

) r----r:----.---, ---------,. 15 '-EJ' : ~n.• : I~~ ~~I(- : IYEL)~<Li~\\lAnGf 20 \" ,.- -.-.'' ' .--, :! ,J I1l \" , \" TO'\" •••, '1. ?.!.., 1 :'---'-. I ~\" - ,<.>..I.-o-J, ,-1;, \"\" I ~J:..-.-.AI;l1--..'-\"'-~_¥-r.\"I, 1M i!:! VII \"\".... ,~,.O•h• (' I , ,• - ,\"......--&..r-- - '\" \" 1 • L __ LI _ .- --- I·'I I· .,..I . ,.'.I.\"~.I.~\"l-1J f ~G e I25 ::; 0 E )e 45 411 IL \\ I- - - -42- I I --rl-jl-----4~4-J 45 48 49 '-lH-JIQONO L-.--'-----'r-,-.1e~o~-.u~'188•~.' ;;;;rn;;_8D.----- MOTHER IlD. Figure 5-50.

) ,., I, r -TI ~ B6IB1O~~4I~-~---1\"\".1 ,21 IG/DUO 0> I .. (wmkl • _ I 25 InfnlK) ~> 51 ..-J:) I • .'..-. 00 IWHT, , .1l '--I 001 1 \"'-':0) JTO\" .. -'4.> -=- ~,~f---,,. \"\"EI \"..... '-'» I ' /) -';,, ,»,,1 ''7». ,,~~>--\"=, I-- \" .. __]5W.'~'i9 38 oN Ir r· 34 ~p ,.\" 40 fWf i ~I WilT! I Wi Illll<) L-.:4.:.;' • 1---1 ~,rnrIGnN'<1~=1:1'--- 4' ,.w.. ,.,'\" ..... _ J -,e.~·I­ +.\"0.----.f-tt,.v ------- Wiring Diagram ,fX) 1.0 lCl

5-59. CAPACITOR WIRING (Figure Wiring For Two Capacitors: 5-50) 1. Jumper the tliO \"+\" terminals Before beginning assembly of the to each other and the two back panel, wire the capacitor or ground terminals to each capacitors that are mounted on the Cross Member as follows: other with two 2-inch lengths oofsi1z0e-12tergmauingeal wire and four Wiring For One Capacitor: ends. 1. Cut two 9-inch lengths of 10-12 2. Cut two 9-inch lengths of 10-12 gauge wire. Attach C size ter- gauge wire. Attach C size minal ends to one end of each terminal ends to one end of wire. Attach 0 size terminal e~ch wire. Attach 0 size ter- ends to the other end of each mlnal ends to the other end wire. of each wi re. 2. Connect the 9-inch wires to the 3. Connect the 9-inch wires to C5 capacitor by mounting the Dsize (capacitor closest to the Power Supply Board) by mounting the termi na 1 ends to the \"+\" and o size terminal ends to the \"+\" ground terminals with the #10 screws provided. and ground terminals with the #10 scre\\'/s. 3. Connect the wi re from the \"+\" 4. Connect the wire from the \"+1'- side of the capacitor to ter- side of C5 to terminal #3 on minal #3 on the power supply the terminal block (TB1). board terminal block (TB1). (See wiring diagram, Figure (See wiring diagram, Figure 5- 50. ) 5- 50. ) 5. C?nnect the wire from the ground 4. Connect the wire from the s1de of C5 to terminal #8 of ground (-) side of the capacitor the termi nal block (TB1). (See to terminal #8 of the terminal wiring diagram, Figure 5-50.) block (TBl). (See wiring dia- gram, Figure 5-50.) Apri 1. 1977 5-59 8800b

5-60. BRIDGE RECTIFIER INSTALLATION 3. Attach an A size terminal end (Figure 5-51) to one end of each wire. Attach a Dsize terminal end to the Use the following instructions to· other end of each wire. wire the bridge rectifier (Bag 1 ) and mount it to the back panel as 4. Slip the A size terminal ends shown in Figure 5-51. The bridge rectifier is part number KBH2S00S. onto the bridge rectifier ter- 1. Mount the bridge rectifier to minals as shown in Figure 5-51. Attach ItIhetertmwoin5a-lsincahndwuisrees to the back panel using a #6-32 the IIAC mask- x 3/4 inch screw, #6-32 nut, flat washer and lockwasher. ing tape to label them 13 and Make sure the terminal labelled 15. Attach the two 19-inch lI_il is at the upper right corner. wires to the \"+\" and \"_II ter- 2. Cut two 5-inch lengths of 12-10 minals and label them 14 and 12 gauge wire and two 19-inch respectively. lengths of 12-10 gauge wire. #6-32 X 1/411 Screw ! ~ Figure 5-51. Bridge Rectifier Installation 5-60 April. i9i7 880Gb

5-61. FAN MOUNTING (Figure 5-52) Screen '--~ 1. Before mounti ng the fan and fan screen to the back panel, install the female plug onto the ter- minals as shown in Figure 5-52. If your kit does not supply a plug, solder two 20-inch lengths of 22-18 gauge wire to the ter- minals. 2. Attach connector sockets (Para- graph 5-58) to the two wire ends. (The wire ends on the plug have been stripped and pre- tinned.) Label the wires 33 and 34. 3. Refer to Figure 5-52. Mount the fan screen and fan to the back panel (with the airflow flowing inward), using four #6-32 x 5/8 inch screws and four #6 \"snap- on nuts. II 16-32 X 5/8\" Screw • #6 Snap-On Nut 5-61 Figure 5-52. Fan and Fan Screen Mounting April, 197i 8EOOb

5-62. FUSE AND FUSE HOLDER 5-63. AC POWER CORD (Figure 5-54) (Figure 5-53) 1. Strip about 7 inches of casing 1. Secure the fuse ho1 der (Bag 2 ). off the end of the power cord into the hole provided on the to expose the three wires in- back panel using a fiber washer side. and mounting nut as shown in Figure 5-53. 2. Put the strain relief (Bag 2) on the cord and position it as 2. Attach a 40-inch length of 22-18 shown in Figure 5-54. gauge wire to the side terminal on the fuse. Mount a connector 3. Snap the strain relief in place pin to the end of the 40-inch on the back panel. wire and label the wire #39 (see Paragraph 5-58). 4. Cut the black power cord wire to a length of 2 inches and solder it to the end of the fuse holder. Cut the green power cord wire to a length of 5 inches and attach a solder lug to the end. Attach a connector socket (Bag 4) (see Paragraph 5-58) to the end of the 7-inch white wire. Fuse Ho1 der AC Power ~ Nut Cord / Fiber Washer Figure 5-53. Fuse Holder Installation Strain Solder Relief Lug ! ~~hi te Wi re 7 5-62 Connector Socket Figure 5-54. AC Power Cord Installation -' April. 19i7 88COb

L Bracket 5-64. TRANSFORMER JFigureS 5-55 ~BOlt through 5-69_ Secondary Side The instructions for wiring and Figure 5-55. IILII Bracket Mounting mounting the transformer will be divided into three parts: Secondary E Size Wiring, Primary Wiring, and Trans- Terminal former Mounting. Review Paragraphs Ends 5-55 through 5-58 for the procedures involved. 5-65. Secondary Wiring. 1. Orient the transformer with the secondary side (four large wires) facing you. Remove the two top bolts and nuts and use them to mount two IILIt brackets (Bag 2) as shown in Figure 5-55. 2. Attach an E size terminal end with heat shrink tUbing (see Paragraph 5-58) to each of the four large transformer wires and label the wires 16-17-18-19 as shown in Figure 5-56. 3. Attach a B size terminal end to Figure 5-56. Terminal End Attachment each of the three remaining l--- #6-32 X 3/4\" secondary wires (Figure 5-56). Label the two yellow wires 20 Screw and 21, and label the yellow/ green wire 22. TB2 4. Bend each of the E size terminal ends at a right angle as shown in Figure 5-56. Mount the four large wires to one side of the 4-terminal block (TB2), using the screws provided. 5. Mount the terminal block to the \"Lit brackets on the transformer using four #6-32 x 3/4 inch screws, four #6-32 nuts and four #6 lockwashers (Figure 5-57). April, :977 Figure 5-57. Terminal Block Mounting 880Cb 5-63

5-66. Primary Wiring. The wires on the primary side of the trans- former will be connected to the 110 volt source with a 10-pin plug (see Paragraph 5-58) according to the following instructions. A. Pin Housing. 1. Attach a connector to each of the primary transformer wires. 2. When all eight wires on the primary side of the transformer have pins attached, insert the pin housing (P4) as shown in Figure 5-58. Insert the pins in the following order (see wiring diagram, Figure 5-50): Wi ring Transformer P4 Wire Color Pin Housing Diagram (Primary Side) Slot Number Designation 3 25 Red/Black 10 26 B1 ue/Black 4 I27 Green/Black 9 28 White/Black 1 29 Red I8 30 Blue 2 31 Green 7 32 Black 5-64 A!Jril.197i 8800b

Place a two-circuit commoning tab over the following pairs of pins: 2 and 4 1 and 3 7 and 9 8 and 10 Make sure the tabs do not come in contact with each other. 3. The two wires from the fan (33 and 34) are to be inserted into slots 7 and 8 of the P4 socket housing. Pin Housing Connector Socket Figure 5-58. Pin Housing Insertion Aoril. 1377 5-65 ~H,nnh

B. Socket Housing. 5-67. Mount Transformer to Back Panel. 1. Cut a 40-inch length of 22-18 gauge wire and attach a con- 1. Mount the transformer to the nector socket to each end. back panel as shown in Figure Label this wire 37. 5-59 using four #10-32 x 1/2 inch screws, 4 nuts, 4 flat 2. Insert one connector socket of washers and four #10 lockwashers. wire 37 into slot 9 of the 10- (The transformer positioning pin socket housing. Insert the may have to be adjusted later socket on the 7-inch white AC when the back panel is mounted power cord wire into slot 10 of to the mainframe, to insure the the 10-pin socket housing. transformer is resting on the cross member.) 3. Connect the socket housing to the pin housing, as shown in 2. Attach wires 13 and 15 from the Figure 5-49. bridge rectifier to terminals 1 and 2 of the terminal block #10-32 x 1/21t (TB2). {~~e Wiring Diagram, Screw Fi gure 5-50.) ~ #10 Nut Fl at Washer Figure 5-59. Transformer Mountinq 5-66 April, 1977 ~o~

5-68. MOUNT BACK PANEL TO MAINFRAME b NOTE (Figure 5-60) Make sure the wires from the fan go - 1. Mount the back panel to the underneath the fan and the trans- mainframe as shown in Figure 5-60 using the original back I former as the back panel is mounted. panel mounting screws. (Tighten these screws down until they are 'Make sure the transformer rests just fi rm.) solidly on the cross member when the back panel is in place. 2. Make sure the two 19-inch bridge 3. Secure the solder lug on the rectifier wires, the 40-inch fuse wire (#39), and the 40- green AC ground wire to one of inch connector plug wire (#37) the holes on the side of the go under the fan as t~e back mainframe using a #6-32 x 1/4\" panel is mounted. Connect wire screw, a #6-32 nut, and a #6 14 from the bridge rectifier to lockwasher. the 1/+\" side of the capacitor(s). 4. Connect three secondary wires Connect wire 12 from the bridge from the transformer to Termin- rectifier to the ground side of al Block #1 as follows: the capacitor(s). Make contin- Wire #20 (Yellow) to slot #5, TB #1 uity checks (see wiring diagram, Wire #21 (yellow) to slot #6, TB #1 Fi gure 5-50). Wire #22 (yellow/green) to slot #7, TB #1 Original Back Panel #6-32 X 1/41/ Screw ~\"ounti ng Screws #6 1.~ : Lockwasher , #6-32 Nut Figure 5-60. Back Panei Mounting 5-67 Aori 1. 19i7 S800b

I fo TB' to slot #1 I -18v (41 Csize' to slot #3 to sl +8v gro terminal eml'~ , 0 0 00 0 0 0 00 0 00 #4~40 x Y2' 00 00 00 screw #50 0 00 00 00 ground chassis #4-40 x Y2\" ground screw connoction #52 -18y #2 +18y #1 +oy 0 0 00 0 00 000 0 0 000 00 000 Figure 5-01. Motherboard W

~ tt----.. lotff9 to slot #10 Ol ound + 18v ~ 0 0 0 00 0 0 .- .a 0 0 000 0 0 ·... 0 ,\"0 D-CO o:(co 141 cable clamps #4·40 x ~~\" screw mainframe ~ cross rail 00000 o o oo #4·40 x %I\" screw 00 0 0 00 00 0 0 0 0 toO-pin co edgo Wire Connections connectors 1.0 I LO

5-69. l8-SLOT MOTHERBOARD ASSEMBLY 5-ti~ 5-70. BUS WIRE CONNECTIONS (Figure 5-61) Refer to Figure 5-61. Note that the two outside rows of holes on either side of the motherboard each have four wire connections. These are the +8v, -18v, +18v and ground lines to the power supply from the bus. The wire connections are made by inserting the end of the wire from the top side of the motherboard and soldering it to the foil (bottom) side. On the foil side of the motherboard, hole #1 and hole #50 are marked on each side. Complete the wire connec- tions according to the ~ollowing ins tructi ons: 1. Cut six 20-inch lengths and two 14-inch lengths'of 22-18 gauge wi reo On both sides of the motherboard: 2. Ins ta 11 one 20-inch wire into hole #1 (+8v). 3. Install one 20-inch wire into hole #2 (+18v). 4. Install one 20-inch wire into hole #52 (-18v). 5. Install one l4-inch wire into hole #50 (ground). Apr; 1. 1977 8800b

5-71. HARDWARE INSTALLATION -lav with -18v (Figures 5-61 and 5-62) +8v \\'/i th +8v ground with ground .At this time, the edge connectors, +13v with +18v cable clamps, mainframe cross 5. ~ount the card guides on both rails, and card guides will all sides of -the connectors, as be assembled onto the motherboard shown in Figure 5-62. according to Figures 5-61 and 5-62 and the following instruc- CARD GUIDE -__

.., tions. MOTHER BOARD-~ 1. Position the two lOa-pin edge connectors on the motherboard # 6-32 X 3/811 SCREWS .. ~Sd as shown in Figure 5-61. Care- fully insert the connector pins Figure 5-62. Card Guide Mounting into their respective holes. If necessary, guide some of ,<\\pr; i. 1977 the pins with the tip of a 8800b small screwdriver. Be sure that the connector is tight aaainst the board and that all lOa pins have been inserted. Solder each connector pin to the foil pattern on the bottom of the board. 2. Visually inspect the connection to ~ake sure there are no sol- der bridges. 3. Remove the ~~o cross rails from the mainframe. Mount the cross rails to the bottom of the motherboard using eight screws, positioned as shown in Figure 5-61. Attach cable clamps to the four back mount- ing screws and run the bus '.vires through the cable clamps before tightening the screws down. 4. j'1atch up the four pairs of bus wires at the back of the mother- board as shown in Figure 5-61. Attach a size C terminal end to each pair. Make sure the correct wires have been paired off: 5-70

5-72. CHASSIS GROUND CONNECTION On both sides of the motherboard: (Fiqure 5-63) 3. Place the braid on the ground '-10 insure a good ground connection land along side the cross rail between the motherboard and the so that the lug and about three chassis, two ground wires will be inches of braid hang over the run from the ground land on the side, as shown in Figure 5-63. foil (bottom) side of the mother- Solder the remaining three board to the side rails of the inches to the ground 1and. It mainframe. Refer to Figure 5-63 may be helpful to first \"tack ll and make the around connections the braid in place with small according to the following instruc- amounts of solder and then, ti ons . using the flat of the solder- ing iron to heat the braid, 1. Cut VNO 6-inch pieces of wire make a solid solder connection braid. over the entire three inches. Make sure there are no solder 2. Attach a solder lug to one bridges to the adjacent lands end of each piece. To do this: on the board. The lugs will twist the end of the wire be attached to the side rails braid; insert it into the of the mainframe after the small hole on the lug; solder motherboard has been installed the braid to the lug until (Paragraph 5-73). the small hole is completely filled with solder. Ground Land \\~i re Bra i d----·J:Sl ~cross Rail Figure 5-63. Chassis Ground Connection Apr; 1. 1977 ~-71 8800b

5-73. INSTALL ~OTHERBOARD ON MAIN- Check for continuity bev~een each bus connection and its FRA~1E respective terminal block con- nection. 1. Attach four #6-32 x 3/8\" thread- ed spacers to the end holes in 3. To assure a good ground connec- the crossrails, using #6-32 x tion, rub the alodine coating 1/4\" screws. Place the mother- off the chassis side member with board/crossrail assembly in the steel wool. On each side of the chassis so that the spacers at board, connect the chassis ground the front of the assembly align wire from the motherboard to one with the 8th hole (from the of the holes on the chassis side front) of the chassis side mem- member. Secure with a #6-32 x bers. Secure the assembly to 3/811 screw and a #6-32 nut. the chassis with four #6-32 x 1/4\" screws. 2. Connect the four terminal ends on the bus wires to the terminal block (T8l) on the Power Supply Board as follows (see wiring diagram, Figure 5-50) : Vol tage Bus Connecti on TSl Connection hol es #52 .slot #1 I -13v ho 1es #1 slot #3 hol es #50 slot #9 i hal es #2 slot #10 II +8v ground +13v 5-i2 Apr; 1, i 977 8BOOb

5-74. ON/OFF SWITCH WIRING (Figure 5-64) The on/off switch (Sl) on the Pin Housing Display/Control Board will connect to wires 37 and 39 from the power supply by means of a 2-pin plug, P5. (See wiring diagram, Figure 5-50.) Prepare the 2-pin plug (Bag4) according to the following instructions. (Refer to Paragraph 5-58 for procedural instructions on preparing the connector sockets and pins.) 1. Cut two 2-inch pieces of 22-18 gauge wire. 2. Solder one wire (wire #40) to 2\" the center pin of 51 on the foil 51 (bottom) side of the Display/\" Control Board. Solder the other wire (wire #38) to the bottom pin of Sl. 3. Attach a connector pin to the Connector Socket free end of both wires. Insert the connector pins into the 2- ~Socket Housing pin pin housing, as shown in Figure 5-64. . ~ Pin Housing 4. Insert the connector sockets of ;, wires 37 and 39 from the power supply into the 2-pin socket housing. CAUTION These sockets (37 and 39) will be directly connected to the 110v source: ~1ake sure the sockets are com- Figure 5-64. On/Off Switch Wiring pletely enclosed inside the socket hous i ng. It is advisable to use tape or ; heat shrink to insulate ththe e!I wi res where they enter socket housing. ,~pri 1, 19ii ~-73 8800b

5-75. fi!OUNT PC BOARDS IN r~AINFRAME 4. Install the Interface Board onto the motherboard in the first 1. Slide the Sub Panel (with the (right-most) lOa-pin connector. Display/Control Board attached) The ribbon connectors, P1 and onto the front of the mainframe P2 should be next to the Display/ so that the front uprights are Control Board. Connect Pl and in between the Display/Control P2 from the Interface Board to Board and the Sub Panel. Pl and P2 on the Display/Control Board. 2. Secure the Sub Panel in place from the front of the main- 5. Install the CPU Board into the frame using the four #6-32 next laO-pin connector. Prepare flathead screws that came with two female connectors (see Para- the chassis. Pull the ground graph 5-76) and mount them so strap taut and secure to the that P3 on the Interface Board chassis with a #6-32 x 1/411 is connected to P3 on the CPU screw and a #6-32 nut. Board. 3. Perform a voltage check before installing the Interface Board and CPU Soard. Connect the pin and socket housings of PS, put the fuse into the fuse holder, plug in the power cord, and turn Sl on. Monitor the voltages on the motherboard. If the voltages are not correct, refer to Section IV Troubleshooting. (Disconnect pow, er before proceeding w•ltnI th. e next steps.) 5-74 Aori 1, 1977 88CCb

5-76. Instructions for Female Con- ~B nectors, P3 (Figure 5-65) Figure 5-65. Female Connector Wiring for P3 ~-1. Using the wire in Bag 4 of the Interface Board, cut the wire into eight 2-inch lengths. 2. Strip 1/8 inch of insulation from the ends of each wire and tin the exposed ends by apply- ing a thin coat of solder. 3. Install a connector pin (Bag 3 of DIC Interface Board) onto both ends of each wire by crimp- ing the wire into place as shown in Figure 5-65 A and B. Then solder the exposed portion of the wire to the pin. 4. Insert the 8 pins into connector slots 3 through 10 on both con- nectors, as shown in Figure 5-65(C). 5. Insert the key (Bag 3 of DIC Interface Board) into connector slot #2. This key is inserted to insure that the female con- nectors are installed correctly. NOTE Slot #1 will not be wired. 6. Aligning slot #1 with pin #1, install the female connector onto the male connector (P3) on the Interface Board and on the CPU Board. ,~.pri 1. 1977 ~-7S 3800b

5-77. CASE The dress panel included with your kit may curve slightly outward. If so, it should be flattened before mounting on the 8800b. 1. Look at the dress panel from the top edge to see the curve. Then hold the panel against the edge of a table and lightly run the palm of your hand down the length of the panel until it appears to be flat. 2. Snap the dress panel in place in front of the case bottom. 3. Lower the mainframe into the case bottom at a front-to-back angle, so the switches on the Display/Control Board fit through the holes on the dress panel. 4. Secure the mainframe in place on both sides by replacing the two original #6-32 x 3/8 11 mounting screws. 5. Put the case top on the case bottom. 5-76 April, 1977 8800b

appendix A parts list:

8800b Interface Board - Continued ~ Bag Quantity Component MITS Stock Number 4 1 100-pin Edge Connector 101864 2 Card Guides 101714 5 2 Ribbon Cable Assembly 34 Conductor 103038 4 14\" Green or Blue Wire 103051 or MISC. 103052 7 2.2K 1/2w 5% Resistor 101945 1 PC Board 100201 Apr; 1. 1977 .~-1 8800b

8800b Display Control Board Bag Quantity Component MITS Stock Number 101142 1 7 7407 Integrated Circuit 101052 101140 5 7405 Integrated Circuit 101088 101040 8 74LS175 Integrated Circuit 101045 101030 2 74LS74 Integrated Circuit 101020 101042 1 74367 Integrated Circuit 101123 101024 2 8T98 Integrated Circuit 101081 > 101135 1 7493 Integrated Circuit 101130 101104 2 7400 Integrated Circuit 101074 101111 4 74LS04 Integrated Circuit 101924 101927 1 74LS14 Integrated Circuit 101928 101999 3 7410 Integrated Circuit 102074 100917 1 74Ll0 Integrated Circuit 10GiOS . 2 74LS30 Integrated Circuit Apr; I, i 977 880Gb 2 4040 Integrated Circuit 1 4009 Integrated Circuit 1 7805 Voltage Regulator 1 79M08 Voltage Regulator 2 2 100 Ohm 1/2w 5% Resistor 1 470 Ohm 1/2w 5% Resistor 1 1K1/2w 5% Resi stor 1 4.7K Resistor Pack 1 5 Ohm Sw 5% Resistor 2 6-32 x 1/4\" Screw 2 II~914 Di ode A-2

8800b Display Control Board - Continued Bag Quantity Component MITS Stock Number 2 6-32 Nut 100933 3 2 #6 Lockwasher 100942 4 3 Ferri te Beads 101876 37 220 Ohm 1/2w 5% Resistor 101925 5 34 2.2K Ohm 1/2w 5% Resistor 101945 3 .001uf lkv Capacitor 100328 6 1 .1uf 50v Capacitor 100380 7 2 47uf 16v Capacitor 100392 2 22'uf 35v Capaci tor 100393 8 25 .1uf 12v Capacitor 100348 17 SPOT (ST1-1F2C) Switch .101879 9 8 MGr4 (STl-3F2C) Switch 101880 10 36 RL-2l LED 100702 1 1702A Programmed PROM r~ISC. 3 8212 Integrated Circuit 101071 24-pin Socket 102105 4 PC Board 100200 1 April, 1977 A-3 8800b

Bag Quantity 8800b CPU Board MITS Stock Number -..-/ 1 1 101070 2 1 Component 101071 1 8080 Integrated Circuit 101143 3 1 8212 Integrated Circuit 102105 4 1 4009 Integrated Circuit 102106 2 24-pin Socket 101141 A-4 1 40-pin Socket 101125 7 8216 Integrated Circuit 101040 2 8224 Integrated Circuit 101045 2 74367 Integrated Circuit 101123 1 74368 Integrated Circuit 101124 74LS14 Integrated Circuit 101042 '2 74LS13 Integrated Circuit 101074 74LS04 Integrated Circuit 101085 1 7805 Voltage Regulator 101945 1 7812 Voltage Regulator 102085 24 2.2K 1/2W 5% Resistor 102083 13 3.3K 1/2w 5% Resistor 101928 1 15K 1/2w 5% Resistor 102095 1 1K 1/2w 5% Resistor 101926 1 620 Ohm 1/2w 5% Resistor 101902 1 330 Ohm 1/2w 5% Resistor 101932 470 Ohm 1/4w 5% Resistor 101949 2 10K 1/2w 5% Res.istor 101960 100 Ohm 1/2w 5% Resistor 1 10 Ohm 2w Resistor April, 1977 1 88COb 1

8800b CPU Board - Continued Bag Quantity Component MITS Stock Number 5 1 IN4733 5v Diode 100721 1 IN4730 3.9v Diode 100734 6 3 CS4410 or 2N4410 Transistor 102806 22 .1uf 12v Capacitor 100348 7 3 .1uf 50v Capacitor 100380 13 luf 35v Capacitor 100308 MISC. 4 33uf 16v Capacitor 100326 2 10uf 25v Capacitor 100352 1 10uf 16v Capacitor 100394 1 22uf 16v Capacitor 100395 1 Small 10-pin Right Angle Connector 101798 1 100-pin Edge Connector 101864 2 Card Guides 101714 7 Ferrite Beads 101876 1 18 MHz Crystal 101877 2 Heat Sink (Large) 101870 6 6-32 x 3/811 Screw 100925 2 6-32 Nut 100933 2 #6 Lockwasher 100942 2 4-40 x 5/811 Screw 100904 2 4-40 Nut 100932 2 #4 Lockwasher 100941 1 PC Board 100198 April. 197i A-5 8800b

8800b Power Supply Board Bag Quantity Component MITS Stock Number 1 .1 1 Bridge Rectifier 25 AMP, 50v(KBH25005) 100735 I 1 Bridge Rectifier TJ 118-0(KBPC802) 100733 v 1 Transistor TIP 140. TIP 141 102819 (with mica insulator and washer) J 1 Transistor TIP 145, TIP 146 102820 (with mica insulator and washer) .j 2 IN4746 18v Zener Diode 100726 / 2 180 Ohm 1/2w Resistor 1Q1998 .J 3 Heat Sink (large) 101870 2 1 Terminal Block 150 Series, 4 Term. 101627 1 Terminal Block 141 Series, 10 Term. 101868 J./1? Jumper for 141 Series 101651 Fuse - 3 amp SLO-8LOW 101772 J 1 Fuse Holder 101813 \" 2 T.B. Brackets 101652 j 1 Strain Relief 101719 ../ 4 Rubber F~et 101751 Ring Terminal #10-#12 wire, #10 bolt 101642 Spade Terminal #10-#12 wire, #10 bolt 101643 Spade Terminal #10-#12 wire, #6 bolt 101644 Quik Disconnect #10-#12 wire, 1/4\" tab 101645 Spade Terminal #18-#22 wire, #6 bolt 101646 3 J 4 2200uf, 25v Capacitor 100375 4 J 1 Plug MATE-N-LOK 10 Circuit 101635 1 Recepta~le MATE-N-LOK 10 Circuit 101636 I 12 Pin MATE-N-LOK 101639 I 12 Socket MATE-N-LOK 101640 A-6 April, 1977 8800b

8800b Power Supply Beard - Continued Bag Quantity Component MITS Stock Number (4 Corranoning Tab 101641 Plug MATE-N-LOK 2 Circuit 101637 \"1 Receptacle MATE-N-LOK 2 Circuit 101638 6-32 x 1/2\" Screw 100918 y1 6-32 x 3/8\" Screw 100925 6-32 x 5/8\" Screw 100916 51 6-32 x 9/16\" Screw 100956 6-32 x 3/4\" Screw 100935 19 8-32 x 1\" Screw 100927 10-32 x 1/2\" Screw 100958 5 6~32 x 1/4\" Screw 100917 6-32 Nut 100933 9 - 4 #6 Snap-On Nut (with fan) 1 8-32 Nut 10-32 Nut 4 ._ 6-32 x 3/8\" Screw (Nylon) 6-32 Nut (Nylon) 13 #6 Lock washer #8 Lockwasher 19 #10 Lockwasher 3/411 6-32 Spacer (Threaded) 4 #6 F1 at washer #8 Flat washer 1 #10 Flat washer 100929 3/8 11 6-32 Threaded Spacer 100962 4 100959 100960 2 100942 100945 2 100963 101626 17 100943 100939 1 100961 101863 4 5 4 1 4 Apr; 1, 1977 4 380Gb A-7

8800b Power Supply Board - Continued Bag Quantity Component MITS Stock Number MISC. •I 1 J1 95000uf 15v DC with Clamp 100391 I1 PC Board 100202 1 6Ft. 3-wire Power Cord 101742 , 20 1 Fan 101869 81 #18 Stranded Wire 103090 #12 Stranded Wire 103092 I Grn. Braid 101801 3/1611 Cable C1 amps 103023 21 Tie Wrap 103037 Heat Shrink 103073 J4 •I 20 6J 11 Separate I1 Transformer 102616 Box A-8 Apr; 1, 1977 8800b