Olivetti d-color MF651, Service Manual, Page: 914 / 1053

21. POWER SUPPLY TROUBLE Field Service Ver. 2.0 Jul. 2009
854
TROUBLESHOOTING
21. POWER SUPPLY TROUBLE
21.1 Machine is not energized at all (DCPU operation check)
21.2 Fusing heaters do not operate
Relevant parts
Main switch (SW1)
Printer control board (PRCB) DC power supply (DCPU)
Step Check item
WIRING
DIAGRAM
(Location)
Result Action
1 Check that the fusing unit is securely
plugged in. (Only for
d-Color MF
65
1
)
— NO Reconnect.
2 Is a power voltage supplied across
PJ001DCPU-1 and 2 on DCPU? K-24 NO Check the WIRING from
the wall outlet to SW1
PJ001.
3 Are the fuses on DCPU conducting? — NO Change DCPU.
4 Is DC24 V being output from PJ10DCPU-4
on DCPU? I-25 to 26 NO Change DCPU.
5 Is DC5 V being input to PJ011DCPU-5 to 7
on DCPU? I-26 to 27 NO Change DCPU.
6 Is DC5 V being input to CN12PRCB-5 on
the printer control board? (LED on PRCB
does not blink.) H-24 NO Change DCPU.
YES Change PRCB.
Relevant parts
Right door switch (MS1)
Fusing unit DC power supply (DCPU)
IH power supply (IHPU)
Relay drive board (REDB)
Step Check item
WIRING
DIAGRAM
(Location)
Result Action
1 Is the power source voltage applied across
PJ002DCPU-1 to 4 on DCPU?
During this time, the right door should be
closed. K-24 NO Check wiring from power
outlet to MS1 to REDB to
PJ002.
2 Is the power source voltage applied across
CN1IHPU-1 to 4 on IHPU? Y-19 NO Check wiring from power
outlet to REDB to CN1.
3 Is the power source voltage applied across
CN259<C>-3 and 4? C-18 YES Fusing unit
NO Change DCPU.
Service Manual Y110571-1