Ricoh C211 Service Manual page 560

MASTER FEED SECTION
c
Adjustment>
1. Adjusting The Thermal Head Voltage
(SS830)
,. /
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3
Purpose : To maintain master making quality and extend the life of the thermal head.
NOTE: This adjustment is always required when the thermal head or
power supply PCB is replaced. At no other time should this
adjustment be used.
Method : 1.
2.
3.
4.
5.
6.
7.
Remove the rear cover of the machine.
Check the voltage noted on the decal, located on the thermal head. (The
voltage varies according to the individual thermal head.)
Disconnect CN-504 of the power supply PCB [A].
Place the master between the platen roller and the thermal head to
protect the thermal head.
Set the original and press the Start key. Press the Stop key when the
master making process starts.
Confirm that the voltage between pin 1 and pin 4 of CN-504 is the correct
+ 0 V) as shown on the decal.
voltage (within _ o,
If it is not, adjust VR201 (VRI : SS830) on the power supply board.
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