Midway Pac Man Troubleshooting Logic Board Part 1 General Instructions
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PAC – MAN PC A082-91375-A000 CHIP NUMBERFUNCTION 74LS00Quad 2 Input Nand 74LS02Quad 2 Input Nor 74LS08Quad 2 Input And 74LS10Triple 3 Input Nand 74LS20Dual 4 Input Nand 74LS42BCD to Decimal Decoder 74LS74Dual “D” Flip-Flop 74LS75Quad Latch 74LS86Quad 2 Input Exclusive or 74S8964 Bit Ram 16 x 4 74LS107Dual “JK” Flip-Flop 74LS1383 to 8 Line Decoder 74LS139Dual 2 to 4 Line Decoder 74LS157Quad 2 to 1 Line Multiplexer 74LS158Quad 2 to 1 Line Multiplexer Inverting 74LS1614 Bit Binary Counter 74LS174Hex “D” Flip-Flop 74LS1948 Bit Shift Register 74LS245Octal Bus Transceiver 74LS2598 Bit Addressable Latch 74LS273Octal “D” Flip-Flop 74LS283 4 Bit Full Adder 74LS367Hex Bus Driver 74LS368Hex Bus Driver Inverting 74LS377Octal “D” Flip-Flop Z80CPU LM377 - LM1877Dual Audio Amplifier NVC284Custom V Ram Addresser NVC285Custom Z80 Sync Buss Controller CD4066Quad Bilateral Switch 10
PAC – MAN PC A082-91375-A000 CHIP NUMBERFUNCTION 2114 Ram 1K X 4 1M5623Prom 256 x 4 7603 Prom 32 x 8 MCM 2532Prom 4K x 8 SL 4239Ram1K x 1 93415Ram1K x 1 27LS00Ram1K x 1 MB 8125Ram1K x 1 CD 40998 Bit Addressable Latch N8T245Octal Bus Transceiver 54LS174Hex “D” Flip-Flop MB7052Prom 256 x 4 MB7051Prom 32 x 8 8304Octal Bus Transceiver ADDITIONAL DEVICES 18.4320 Crystal 78GVICVoltage Regulator D44VM4Transistor NPN D40K1Transistor NPN 2N3391Transistor NPN 1N 4004Diode A15Diode 1N914BDiode 1N47376.2V Zener Diode 11
SERVICE BULLETIN GAME: PAC-MAN SUBJECT:Custom Chips 6-D and 5-S When the custom chips are not available due to a supply problem the following alternate plug in units will be used. 1. At location 6-D PC 082-91383-BOO0 280 sync buss controller. 2. At location 5-S PC 082-91384-B000 V-Ram Addresser. PAC - MAN V - RAM ADDRESSER (284) # A082-91384-B000 CHIP NUMBER FUNCTION 74LS02Quad 2 Input Nor 74LS86Quad 2 Input Exclusive or 74LS157Quad 2 to 1 Line Multiplexer 74LS257Quad 2 to 1 Line Multiplexer-Tri State Z - 80 SYNC BUSS CONTROLLER (285) # A082-91383-BOO0 74LS02Quad 2 Input Nor 74LS74Dual “D” Flip-Flop 74LS139Dual 2 to 4 Line Decoder 74LS244Octal Buffers - Tri State 74LS374Octal “D” Flip-Flop-Tri State 12
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