Oce 7050, Technical & Service Manual, Page: 90 / 275

ed. 6 04 Exposure 301
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001
Adjustments
1 Exposure maximum level
First we have to adjust the voltage at which the lamp will have its maximum
power. This voltage is indicated by the manufacturer of the power supply.
When the lamp gets hotter, it produces more light with the same input power.
Therefore we cannot set the voltage at the wanted value, but do we have to do
the adjustment as follows:
1
Put a folded, white A1 sheet on the original glass.
2
Connect a multi-meter between TP1 (EXPSE) and TP2 (GND) on the exposure
supply 04PBA01.
■
The test pins are located at the right-hand side.
3
Put jumper J4 on the exposure supply 04PBA01 into the “adjustment position”.
4
Run SDS test -2, -3 to switch on the exposure lamp. (See Faults page 26 ).
5 Measure the voltage on TP1 and adjust the potmeter to keep the voltage at 8.6
V
±
0.05V.
6
When the voltage decreases, stop the adjustment.
7
Switch off the main voltage and put jumper J4 on the exposure supply
04PBA01 back into its normal “working position”.
8.6
±
0.05V
T
V
adjustment
position
working
position
exposure supply
04PBA01
TP 1
TP 2
potmeter