1) Lcd Display Malfunction; Lcd Display Malfunction; Nothing Is Displayed In Lcd - Olivetti d-Color P116 Service Manual

7.4.2.(1)

LCD Display Malfunction

(1-1)

Nothing is displayed in LCD

Confirmation Items
(1-1-1) Fuse confirmation
Fuse F3 of main board (TB3
PCB)
(1-1-2) Check the connection
Connection of low-voltage
power supply unit and main
board (TB3 PCB).
Connection cable between
low-voltage power supply unit
and main board (TB3 PCB).
Connection of main board
(TB3 PCB) and operation
panel board (WHP PCB).
FFC connects between main
board (TB3 PCB) and
Operation panel board (WHP
PCB).
(1-1-3) Peripheral check of power supply
AC power supply supplied to
the printer.
Voltage setting of low-voltage
supply unit (100V/ 230V).
The 5V power supply supplied
to the main board (TB3 PCB).
The 5V power supply
supplied to the Operation
panel board (WHP PCB).
(1-1-4) Short circuit confirmation of power supply
The 5V power supply and
24V power supply supplied to
the main board (TB3 PCB)
152
Confirmation Tasks
Confirm whether F3 is Blown.
Confirm whether the cord is normally connected from a low-
voltage power supply to the POW connector of main board
(TB3 PCB)
Check whether incompletely connection and oblique insertion
of connector exist.
Confirm whether it is disconnected.
Confirm whether the coating peeling off exists.
Check whether Cord ASSY defect exists such as the wire
pulled out.
Confirm whether 7-pole FFC is normally connected with the
OPE connector of main board (TB3 PCB).
Confirm whether 7-pole FFC is normally connected with the
CN1 connector of operation panel board (WHP PCB).
Check whether incompletely connection and oblique insertion
of connector exist.
Disconnection check by the tester. Confirm the coating peeling
off by visual inspection.
Confirm the supplied voltage of the AC power supply.
Measurement of supplied AC voltage.
Confirm the power supply setting of the equipment used.
(Confirm the short plug of the low-voltage supply setting
switch. Short plug Have/None=100V /230V)
Confirm the 5V power supply by 5 and 6pin of POW1
connector of the main board (TB3 PCB).
Confirm the 5V power supply by 2pin of CN1 connector of
Operation panel board (WHP PCB).
Confirm whether short circuit exists by the POW1 connector of
the main board.
If
3, 4pin: 24V
5, 6pin: 5V
7, 8, 9pin:0VL
1, 2 pin:0VP are measured, the position of short circuit can be
located.
Pulling out the cords connected with the main board (TB3
PCB) one by one, and then fix the position of short-circuit.
d-Color P116 Service Manual
Action at NG
Exchange F3 or TB3
PCB.
Try to plug in the code
normally.
Replace it with normal
low-voltage power
supply unit.
Try to insert the cord
normally.
Replace it with normal
FFC.
Supply the AC power
supply.
Adjust the low-voltage
power supply setting.
Exchange the Low-
voltage power supply.
Exchange F3 or TB3
PCB.
Exchange the short
parts.
Y110260-4