Oki OKIPAGE 6e Service Manual page 125

A
• Take the measurement of the following voltages at connector CN2 on the power supply
board:
Voltage between pins 1 and 3: ... about 28 V AC
Voltage between pins 5 and 6: ... about 10 V AC Are the voltages normal?
• Yes Is fuse F3 on the power supply board open?
• Yes Replace fuse F3 (if it blows again, check the resistance of the registration
• No
• Yes Replace the AC transformer.
• No
• No Replace the power supply board.
• Yes
ACIN
F1
L
FG
N
Fuse Ratings
AC Input
120 V
Fuse
F1 125 V 6.3 A
F2 125 V 1.6 A
F3 125 V 2.5A
Troubleshooting
• No Replace the power supply board.
and drum motors (see 7.3). If the resistance is wrong, replace motors or
replace the power supply board or Main Control PCB).
Is the AC input voltage output between pins 1 and 2 of connector CN1 on the
power supply board normal?
Is fuse F1 or F2 on the power supply board open?
Replace open fuse F1 or F2 (if is opens again, replace the power supply
board).
Power supply board
CN1
F2
1
Filter
Circuit
2
230 V
250 V 5 A
250 V 2.5A
Figure 6-1 Low-voltage Power Supply Block Diagram
CN2
F3
Thermal Fuse
1, 2
3, 4
±8 Rectifying/
6
Smooting
5
AC Transformer
6 - 26
Service Manual, P/N 59276401
CN3
+30 V
+30 V 17, 18
Smoothing
Circuit
11, 12
+5 V
+5 V
9, 15, 16
0 V
Stabilizing
Circuit
+8 V 24
Circuit -8 V
22
OKIPAGE 6e/6ex