Sharp XG-C58X Service Manual page 34

XG-C58X
XG-C68X
[Adjustment of ballast unit output power (lamp power)]
1. List of parts requiring adjustment
When replacing the following parts, adjust the ballast unit output power (lamp power).
Part name
1 Cement resistor
2 Ballast Control Unit
3 Ballast microprocessor
5V regulator
4
PWM controller
5
2. Adjustment jigs
The following jigs are required for adjusting the ballast unit output power (lamp power).
1 Adjustment jig (resistance load 25Ω)
2 Connecting cord (conversion cable)
3. Ballast unit output power (lamp power) adjustment method
Adjust the ballast unit output power (lamp power) in the following method.
[Setting method]
XG-C58X/C68X
Projector
[Adjustment method]
（1）Unplug the ballast unit lamp cable(QCNW-D882WJQZ) of the XG-C58X/C68X projector from
the lamp and connect the cable to the connecting cord (QCNW-E008WJZZ).
（2） Connect the connecting cord (QCNW-E008WJZZ) to the adjustment jig
(RUNTZA018WJZZ).
（3） Connect TP1 of the adjustment jig (RUNTZA018WJZZ) to the negative terminal of the
tester and TP2 to the positive terminal.
（4） Turn on the XG-C58X/C68X projector.
（5） Age the projector for 60 seconds or more.
（6） Adjust the volume resistor (R7728) of the ballast control PWB (DUNTKD497WEF0) so
that the voltage of the tester reaches 83± 0.5 V.
Adjustment value: 88± 0.5 V
[Cautions]
（1） Caution for electric shock: Do not touch the test points TP1 and TP2 of the adjustment
jig when supplying power since a high voltage and large current is applied to them.
（2） Caution for heat: Be careful that the resistance load of the adjustment jig produces a high
temperature when supplying power.
（3） Connection of the lamp cable: Check that the lamp cable and connecting cord (QCNW-E
008WJZZ) are connected securely.
Poor connection may cause smoking or ignition due to arc discharge.
Ref No.
RR-WZA015WJZZ
R922
-- DUNTKD497WEF0
RH-iXB384WJZZ
IC7707
VHiTA78L05F-1Y
IC7704
VHiM51995AF-1Y
IC7701
Part name
RUNTZA018WJZZ
QCNW-E008WJZZ
Part code
Part code
Tester
(Voltage)
Ballast Unit
−
＋
Lamp Cable
(QCNW-D882WJQZ)
C onnecting C ord
（Q C N W -E008WJZZ)
34
TP1
Adjustment Jig
(RU N T ZA 018WJZZ)
TP2