Service manual

Table 4-2 Troubleshooting Information for External Test Failure
Test
No.
First Failed Test Probable Faulty Assembly
A1 A51 A30 A53 A2 A7 A3 A4 A5 A6 A8
17 FRONT PANEL † †††
18 FLOPPY DISK DRIVE † †††
19 24bit IO †††
20
ALL ANALOG
*1. It consists of the external tests 21 through 26.
*1
21 A8 IF †††
22 A3 VCH and A8
FRONTEND
††† ††
23 A2 ATT †††
24 A5 NULL FRONTEND †††
25 A4/5/6 NULL †† ††
26 A3 ICH and A4 †† ††
11 4 4
Troubleshooting
External Tests Failure Troubleshooting
†††: Most suspicious assembly
††: Suspicious assembly
†: There is some possibility of a fault