OKIDATA OL1200ex, Service Manual

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%1. The printer does not work normally after being turned on.
1
The printer does not work normally after being turned on.
Is message shown in the LCD display (for less than 1 second)?
No Is the AC cable connected properly?
No Connect the cable properly.
t
No Is the message (16 columns display only on the top row ) shown in the LCD
display?
Yes Replace the Control board.
t
Yes Are the following voltages applied to the corresponding pins of the POWER
connector on the Control board? (For the measuring points, see Fig. 6-1.)
Pin 15: 8V, Pin 16: +8V, Pins 19, 20: +30V
Pins 21, 22, 26-29: 0V, Pins 23-25: +5V
No Remove the AC cable. Set the POW switch to the ON position.
Measure the resistance between L and N pins of the AC inlet using a
multimeter. Is there continuity between L and N pins (normal resistance:
554 ký)? (For measuring points, see Fig. 6-2.)
No Replace the fuse F1 or the Power/sensor board
t
Yes Are POWER connector and FRONT connector (white, 9-pin connector)
for CN3 on the Power/sensor board, CN8 on the Driver board, and the
Control board made properly.
No Connect the connectors properly.
t
Yes Are the following voltages applied to CN3 connector of the Power/sensor
board? (For measuring points, see Fig. 6-3.)
Pins 16, 17: +30V, Pins 8-10, 14, 15: 0V
Pin 20: 8V, Pins 11-13: +5V, Pin 21V: +8V
No Replace the Power/sensor board.
t
Yes Replace the Driver board.
t
Is the printer recovered?
No Replace the Main board
t
YES END.
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