TM 11-6625-3145-14
Maintenance: Troubleshooting-318/338 Service
Figure 7-8. 318 ACQ memory test
Writing to I/O address 4A
hex
generates the internal clock from U140 (
µ
PB3Z199R) on the A04 board. This clock is buffered by U112D (quad 2-input NOR gate,
MC1662) and is sent to U222B (dual 3-input/3-output NOR gate, 10211) on the A02 board. Then this clock is returned to the Strobe Generator circuit on the A03
board, and is also sent to U222A (10211 ) on the A02 board to produce DLDCLK in conjunction with DL104 (delay line, ZD10-20) on the A01 board. DLDCLK
clocks U122 and U128 (10176) on the A01 board and U228 and U234 (10176) on the A02 board. The Strobe Generator on the A03 board delivers WE and ADRS
CLK to the A04 board unless the clock qualifier is set to off.
7-19
Summary of Contents for 318
Page 119: ...318 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Page 182: ...338 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Page 253: ...318 ___________________ TROUBLESHOOTING TREES ...
Page 344: ...338 TROUBLESHOOTING TREES ...
Page 517: ...TM 11 6625 3145 14 318 338 4434 923 318 Block Diagram ...
Page 518: ...TM 11 6625 3145 14 318 338 4434 924 338 Block Diagram ...
Page 519: ...TM 11 6625 3145 14 318 338 4434 925 318 Acquisition Module Wiring Diagram ...
Page 520: ...TM 11 6625 3145 14 318 338 4434 926 318 338 Mainframe Wiring Diagram ...
Page 521: ...TM 11 6625 3145 14 318 338 4434 926 338 Acquisition Module Wiring Diagram ...
Page 522: ...TM 11 6625 3145 14 318 338 4434 928 Figure 9 1 318 A01 Input A Board Component Locations ...
Page 526: ...TM 11 6625 3145 14 ...
Page 528: ...TM 11 6625 3145 14 Figure 9 3 318 338 A03 ACQ Control Board Component Locations ...
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Page 542: ...TM 11 6625 3145 14 Figure 9 8 318 338 A10 CRT Board Component Locations ...
Page 544: ...TM 11 6625 3145 14 Figure 9 9 318 338 A11 Inverter Board component Locations ...
Page 546: ...TM 11 6625 3145 14 Figure 9 10 318 338 A12 Regulator Board Component Locations ...
Page 551: ...TM 11 6625 3145 14 Figure 9 12 338 A01 Input A Board Component Locations ...
Page 553: ...TM 11 6625 3145 14 318 338 SERVICE ...
Page 554: ......
Page 555: ...PIN 058584 ...