Master Feed Section; Thermal Head Voltage Adjustment - Ricoh C217 Service Manual

3. MASTER FEED SECTION

3.1 THERMAL HEAD VOLTAGE ADJUSTMENT

PURPOSE: To maintain quality when making masters and to prevent the
thermal head from being damaged.
ADJUSTMENT STANDARD:
the thermal head. The value varies from one thermal head to
another. The adjustment voltage should be between "X - 0.05"
and "X + 0.05."
CAUTION: This adjustment is always required when the thermal head
or power supply PCB has been replaced.
1. Turn off the main switch and disconnect the power plug.
2. Remove the front cover (4 screws).
3. Disconnect CN304 [A] on the power supply PCB.
4. Read the voltage value described on the decal on the thermal head.
5. Connect the power plug, and turn on the main switch to access the
output mode. (Turn on the main switch while holding down the Print
Start, Stop, and Clear keys together. Then, press the Memory/Class key
once to indicate "00" in the memory display.)
6. Select the thermal head power supply mode. (Enter "1" with the number
key.)
SM
Refer to the voltage value (X) described on
[A]
5-13 C217