Oki OKIPAGE 10ex Maintenance Manual page 100

1-1
• Take the measurement of the following voltage readings at connector CN2 on the power supply/
sensor board:
Voltage between Pins 1 and 3: ... about
Voltage between Pins 5 and 6: ... about 9.2 V AC
Are the voltages within the normal range?
• Yes Is fuse F3 on the power supply/sensor board blown?
• No
• Yes Replace fuse F3 (if it blows again, check the resistance of the registration and main/
drum motors. If it is faulty, replace motors or replace the power supply/sensor board or
main control board).
• No Is the AC input voltage output between Pins 1 and 2 of connector CN1 on the power
supply/sensor board normal?
• Yes Replace the AC transformer.
• No Is fuse F1 or F2 on the power supply/sensor board blown?
• No Replace the power supply/sensor board.
• Yes Replace blown fuse F1 or F2 (if is blows again, replace the power supply/sensor board).
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 3.15A
40718401TH Rev.5
Replace the power supply/sensor board.
Power supply/sensor board
CN1
F2
Thermal Fuse
1
Filter
Circuit
2
230 V
250 V 5 A
–
AC Transformer
250 V 2.5A
Figure 6-1 Low-voltage Power Supply Block Diagram
40 V AC
CN2
F3
Smoothing
1, 2
3, 4
Stabilizing
±8 Rectifying/
6
Smooting
Circuit
5
CN3
+38 V
+38 V 17, 18
Circuit
11, 12
+5 V
+5 V
9, 15, 16
0 V
Circuit
+8 V 24
-8 V
22
100 /