Service manual

2AV/X
1-7-2
1-7
• - • - • -
•: On for 0.25 s
-: Off for 0.25 s
• - • – • - • –
•: On for 0.25 s
-: Off for 0.25 s
–: Off for 1 s
Off
• - • - • -
•: On for 0.25 s
-: Off for 0.25 s
Off
8. Turn the main switch off and disconnect the power plug.
9. Remove the memory tool PCB.
10. Replace the main PCB.
• After replacing the main PCB (writing the machine data)
11. Insert the power plug and turn the main switch on.
12. Upgrade the firmware on the main PCB and operation unit PCB (20 cpm copier only). See pages 1-7-3 and 5.
13. Turn the main switch on.
14. Enter maintenance mode.
15. Run maintenance item U020.
16. Run maintenance item U252 and set the destination.
17. Run maintenance item U917 and select “WRITE”.
18. Exit maintenance mode.
19. Turn the main switch off and disconnect the power plug.
20. Insert the memory tool PCB into the copier and connect its CN1 to CN31 on the main PCB.
Note:
On the 15 cpm copier, insert the memory tool PCB along the upper and lower guides.
On the 20 cpm copier, take care not to allow the memory tool PCB to make contact with the metal components of the copier.
21. Insert the power plug and turn the main switch on. LED1 (green) on the memory tool PCB flashes (on for 0.5 s → off for
0.5 s → on for 0.5 s → off for 0.5 s → on for 1 s → off for 0.5 s) for approximately 10 seconds and the machine data on
the NVRAM will be written to the SRAM on the main PCB.
22. When flashing LED1 (green) on the memory tool PCB remains lit, writing of the machine data is complete.
If an error occurs while the machine data is being written, LED1 (green) flashes and goes off in the patterns given below
according to the nature of the error. Remove the memory tool PCB and perform the respective corrective measures and
then write the machine data again.
6. Insert the power plug and turn the main switch on. LED1 (green) on the memory tool PCB flashes (on for 1 s → off for 1 s)
for approximately 10 seconds and the machine data on the SRAM of the main PCB will be backed up on the NVRAM.
7. When flashing LED1 (green) on the memory tool PCB remains lit, backing up of machine data is complete.
If an error occurs while the machine data is being backed up, LED1 (green) flashes and goes off in the patterns given
below according to the nature of the error. Remove the memory tool PCB and perform the respective corrective
measures and then back up the machine data again.


“WRITE” is selected in maintenance
item U917.
Since the NVRAM contains data
from the previous operation, data
cannot be written to it.
The machine data was not trans-
mitted from the SRAM on the main
PCB to the NVRAM correctly.
Run maintenance item U917 and select “READ”.
Replace the NVRAM on the memory tool PCB and back
up the machine data again.
Turn the main switch off and on and back up the machine
data again. If the error persists, replace the NVRAM.
LED1 Description Corrective measures





Run maintenance item U917 and select “WRITE”.
Replace the NVRAM on the memory tool PCB and then
back up the machine data again.
Replace the NVRAM on the memory tool PCB and back
up the machine data again.
Turn the main switch off and on and write the machine
data again. If the error persists, replace the main PCB.
“READ” is selected in maintenance
item U917.
An NVRAM with no backup data is
used. (LED1 flashes for 10 s in the
pattern on for 1 s and off for 1 s, and
then flashes in the pattern described
on the left.)
The machine data on the NVRAM
may be damaged (checksum error).
The machine data was not
transmitted from the NVRAM to the
SRAM on the main PCB correctly
(SRAM problem).
LED1 Description Corrective measures
23. Remove the memory tool PCB.