Service Tips - Ricoh A095 Service Manual

Rev. 6/13/97

11. SERVICE TIPS

Block Diagram of the Latent Image Control System
If VD or VL are not within specification
• Check service code counters: Enter SP mode, select item 6. Check service
code counters, this may indicate a component failure.
Confirm exposure lamp voltage
• Turn process control off: Enter SP Adjustments, page 7, item 4. Select
reset. (Refer to FSM page 4-12).
• Adjust exposure lamp voltage: Adjust Exposure Lamp voltage to 55 VAC.
SP mode Adjustment page 9, item 1. (Refer to FSM page 4-13).
• Confirm the exposure lamp voltage: Connect RMS. meter to CN704 pins 1
and 2 on the AC Drive Board. Make a copy, the output voltage should be
approximately 55 ±.5 VAC. This will vary slightly from machine to machine, due
to variations in the machines and wall voltage .
If Exposure Lamp AC voltage is out of range
• Confirm the Exposure Lamp PWM voltage: at TP519 on the Optics Control
Board (refer to the chart below).If Exposure Lamp PWM voltage is out of range,
try replacing the Optics Control Board. If Exposure Lamp PWM voltage is in
range, try replacing the AC drive Board
• Check the Lamp Monitor Signal: at TP106 on the Main Board. since the
Lamp Monitor Signal can vary from machine to machine, use the chart below as
a reference, not a specification.
Voltage levels from several working machines were averaged for this chart
FSM
.
5-130
.
A095/A096/A097