Xerox Telecopier 7033, Service Manual

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RAP 2.3Terminal Lock-Up
1. T h e t e r m i n a l i s i n o p e r a t i v e a n d t h e
display stays on
POWER-ON CHECK
.
Y N
| Go to step 4.
2. Perform the following:
a. Disconnect the power cord.
b. Remove the rear PWB access cover.
c. Disconnect all PWBs from the main
PWB except the RAM/ROM PWB.
d. Connect the power cord.
After approximately five seconds, the
display changes from
POWER-ON CHECK
to
PLEASE WAIT
.
Y N
| Replace the RAM/ROM PWB. If
the problem still exists, replace
the main PWB.
3. Perform the following:
a. Disconnect the power cord.
b. One at a time, reconnect the PWBs
that were disconnected in step 2c.
c. Connect the power cord, and check
for lock-up (stays on
POWER-ON CHECK
)
after reconnecting each PWB.
When the terminal locks-up at
POWER-ON
CHECK
, replace the last PWB reconnected.
4. Perform the following:
a. Disconnect the power cord.
b. Remove the rear cover (REP 4.1.7).
c. Remove the EMI shield (REP 4.1.8).
d. Connect the power cord.
e. Measure the following voltage at
P/J300 on the main PWB (Figure 1).
• pin 1 to pin 2 = 24 VDC ±2.4 VDC
• pin 7 to pin 8 = 24 VDC ±2.4 VDC
Both voltages are correct.
Y
N
| Go to step 6.
5. Replace the main PWB. If the problem
still exists, replace the RAM/ROM PWB.
Figure 1. P/J300
P/J300
Wire Side
P/J600
12 11 10 9 8 7
6 5 4 3 2 1
Main PWB
6. Perform the following:
a. Disconnect the power cord.
b. Disconnect P/J300 from the main
PWB.
c. Connect the power cord, and
measure the voltage that was not
correct in step 4e.
The voltage is now correct.
Y
N
| Replace the power supply.
7. Perform the following:
a. Disconnect the power cord.
CAUTION
Wait until the power supply LED is off
before connecting P/J300.
b. Connect P/J300.
c. Disconnect P/J102, P/J104 and P/J110
from the main PWB.
d. If installed, remove the option
mother PWB.
e. Connect the power cord, and
measure the voltage that was not
correct in step 4e.
The voltage is now correct.
Y
N
| Replace the G3 PWB. If the
problem still exists, replace the
main PWB.
8. Perform the following:
a. Disconnect the power cord, and
reconnect P/J102.
b. Reconnect the power cord, and
measure the voltage that was not
correct in step 4e.
The voltage is now correct.
Y
N
| Replace the nudger solenoid.
9. Perform the following:
a. Disconnect the power cord.
b. Reconnect P/J104.
c. Connect the power cord, and
measure the voltage that was not
correct in step 4e.
The voltage is now correct.
Y
N
| Replace the paper feed solenoid.
10. An auxiliary tray option is installed.
Y N
| Perform the System Check.
11. Replace the auxiliary tray paper feed
solenoid.
8/91
RAP2.1, 2.2
2-18 Telecopier 7032 / 7033 Service Manual
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