20-38
20.6 Printer/Processor DC Power Supply Unit and Circuit Boards
■
N LED Pattern at Starting UP and Provable Causes
LED Pattern
*: The LED lights up for approximately 30 seconds then goes out.
LED Pattern and Provable Causes
■
ATX23 Circuit Board LED Check
1. Open the magazine door and remove the air filter
holder at the image control box section.
2. Check the LED on the ATX23 circuit board by
peering through the holes in the image control
box.
LEDs D+12V0 : Power supply for fan
D+12V 1 : Input power for D+3.3V
D+12V2 : Input power for D+5V
D+3.3V : D+3.3V output
D+5V : D+5V
output
OVPALM : Over voltage alarm
Condition
Normal
Abnormality 1
Abnormality 2
Abnormality 3
Abnormality 4
1
2
1
2
1
2
1
2
1
2
Timer Starting Up
Green
Green
Green*
Red *
Green*
OFF
OFF
OFF
OFF
OFF
Power Switch
Starting Up
Green
Green
Green
Red
Green
OFF
OFF
OFF
Green
Green
Standby
Green
Green
OFF
OFF
OFF
OFF
OFF
OFF
Green
Green
Running
Green
Green
OFF
OFF
OFF
OFF
OFF
OFF
Green
Green
LED Pattern
Location
Provable Causes
Part Replacement
Abnormality 1
ATX23 circuit board
and after
1) Faulty ATX23 circuit board (no output)
2) Activated protection circuit of ATX23 circuit
board due to abnormal image control section
(short circuit or over current)
1) ATX23 circuit board
2) GMC23 circuit board
Abnormality 2
Before ATX23 cir-
cuit board (except
SPS23 circuit
board)
1) Faulty or tripped circuit protector CP2
2) Faulty relay K1
3) Faulty DC power supply unit
4) Blown fuse on PWR23 circuit board
5) Faulty harness (relay K1-to-DC power supply-
to-ATX23 circuit board)
1) Circuit protector CP2
2) Relay K1
3) DC power supply
4) Fuse
5) Harness
Abnormality 3
AC power supply to
SPS23 circuit board
(1)
1) Faulty or tripped leakage breaker
2) Faulty or tripped circuit protector CP1
3) Faulty SPS23 circuit board
1) Leakage breaker
2) Circuit protector CP1
3) SPS23 circuit board
Abnormality 4
AC power supply to
SPS23 circuit board
(2)
1) Faulty GPR23, PAC23 or CTL23 circuit board
2) Faulty harness (GPR23-to-CTL23-to-PAC23
circuit board)
1) GPR23, PAC23 or
CTL23 circuit board
2) harness
Image Control Box
ATX23 Circuit Board
D+12V1 (Green)
D+12V2 (Green)
D+3.3V (Green)
D+5V (Green)
OVPALM (Red)
D+12V0 (Green)