Operator Testing And Troubleshooting - DEC LA 120 Technical Manual

1.4 OPERATOR TESTING AND TROUBLESHOOTING
The LA120 automatically runs several internal tests and displays the error test results in the numeric
display. Table 1-8 lists the error test results, the cause, and the required corrective action.
Symptom
Test Result
o
(flashing)
1 (flashing)
2 (flashing)
3 (flashing)
4 (flashing)
5 (flashing)
6 (flashing)
7 (flashing)
8 (flashing)
Table 1-8 LA120 Internal Tests
Cause
Corrective Action
Call for service
Call for service
Call for service
Call for service
Call for service
Call for service
Call for service
See Note 1
9 (flashing)
8888 (constant)
Error at ROM address 0
Error at ROM address 2048
Error at ROM address 4096
Error at ROM address 6144
Error at ROM address 8192
Error at ROM address 10240
Reserved for future options
RAM diagnostic failure
Microprocessor failure
Nonvolatile memory failure
Cover open
See Note 2
Close cover
Reload paper
Out of paper
NOTES
1. Turn LA120 off, then back on. If an error in-
dication reappears, record indiction and call for
service.
2. If the original problem was a flashing 9, check
stored SET-UP feature to ensure that it has not
been affected. The self-test is an additional test
(Paragraph 2.1.3) that can be initiated by the
operator. The test will help determine if the
problem is in the printer or in some other por-
tion of the communication system.
3. If you are unable to turn the printer.on or if the
printer appears to be faulty, refer to the oper-
ator's troubleshooting table (Table 1-9). This
table describes those things an operator can
check prior to requesting service.
Table 1-9 Operator Troubleshooting
Possible Cause and Corrective Action
LA120 does not turn on when
printer power switch is set to
ON.
AC power cord is not plugged into wall outlet or front of printer.
Plug in cord.
Power is not coming from wall outlet. Check outlet with a known
working electrical device (such as a lamp). If no power, call main-
tenance personnel.
AC line fuse blown; turn printer off and replace fuse (Figure 1-3).
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