Service Manual
6-25
Troubleshooting
6
Table 6-4 Image Processor Service Mode tests
Test
Function
10 CPU
Interrupt
11
Instruction ROM Checksum
13 NVRam
Acknowledge
19
NV Register Write Read
1a
NV Clear (Zero entire device)
1b
PROM Data Read
1c
Font ROM Checksum
21
Centronics Register Write Read
22
Centronics LoopBack (external)
23
TC8576 CTS verification
24
TC8576 External Loopback
25 SCSI
Interrupt
26
SCSI Register Write Read
27
Centronics to SCSI loop around. Ensure front panel wiring harness is correctly
installed.
2d SmartCard
2e
16550 Internal Loopback
2f
16550 External Loopback
34
DRAM Refresh
36
SIMM1 Data Paths. Ensure an 8 Mbyte SIMM is installed in connector SIMM 1.
37
SIMM1 Addrs Paths
38
Extended SIMM1 Data Paths
39
Extended SIMM1 Addrs Paths
3a
SIMM2 Data Paths
3b
SIMM2 Adrs Paths
3c
Extended SIMM2 Data Paths. Ensure a 16 Mbyte SIMM or 32 Mbyte RAM
SIMM is installed in the SIMM 2 connector.
3d
Extended SIMM2 Adrs Paths
40
Front Panel LCD Test
41 LCA
Configuration
42
LCA Reg Write Check
43
FIFO Empty Check
44
FIFO Half Check
45
FIFO Full Check
46
FIFO Loopback I B 47 Clock Test
68 SmartCard
Installed?
99
Dump EEprom to DRAM
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