Service Call Conditions; Exposure Lamp Malfunction - Ricoh FT4430 Service Manual

16 April '88

SERVICE CALL CONDITIONS

11 EXPOSURE LAMP MALFUNCTION

- Possible Causes -
Exposure lamp turns on while in standby condition.
Exposure lamp circuit open (lamp filament broken).
+ Cooling fan malfunction.
- Action -
Does the cooling fan work?
Y N
I I
Check the cooling fan circuit. Replace the cooling fan if it is defective.
Turn the main switch off and on. Does SC 11 remain off?
Y N
I
) Replace the exposure lamp if the exposure lamp circuit is open.
Replace the lamp regulator if the exposure lamp circuit is not open.
F
Press the Start key. Does lamp trigger (CN204-9) go from +24 V to O V?
I
Y N
I
Replace the main board.
Replace the lamp regulator.
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