Sharp XR-32S-L Service Manual page 15

1. 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 Metal Oxide resistor
2 Ballast Control PWB
3 Ballast microprocessor
4 5V regulator
5 Ballast Switching Control
2. Adjustment jigs
The following jigs are required for adjusting the ballast unit output power (lamp power).
Part name
Adjustment jig (resistance load 25 Ω)
1
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]
XR-32S-L
XR-32X-L
PG-F212X-L
Projector
2. Adjustment method
1) Unplug the ballast unit lamp cable of the projector from the lamp and connect the cable to the connecting cord (QCNWKA022WJZZ).
2) Connect the connecting cord (QCNWKA022WJZZ) 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 projector.
5) Check the Lamp setting to "Bright".
6) Ageing the projector for 60 seconds or more.
7) Adjust the volume resistor (R7805) of the ballast control PWB (DUNTKE395WEF3) so that the voltage of the tester reaches 72.5±0.5V.
Adjustment value: 72.5±0.5V
CAUTION: (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 (QCNWKA022WJZZ) are connected securely.
Poor connection may cause smoking or ignition due to arc discharge.
Ref No.
R950~R955 VRS-TW2HPR33JY
—— DUNTKE395WEF3
IC7707 RH-iXC630WJZZQ
IC7704 VHiTA78L05F-1Y
IC7701 VHiM51995AF-1Y
RUNTZA018WJZZ
QCNWKA022WJZZ
Part code
Part code
Tester
(Voltage)
Ballast Unit
Lamp Cable
Connecting Cord
(QCNWKA022WJZZ)
2 – 5
XR-32S-L/XR-32X-L/PG-F212X-L
TP1
Adjustment Jig
(RUNTZA018WJZZ)
TP2