Samsung VPL500, Service Manual

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Samsung Electronics 4-37
Alignment and Adjustment
X-TAL
24P-LCD
10P-BL
A
G
B
VCO
VCOM
R
1. VCO
1) TP-VCO & EVR
2) Connect an voltmeter to TP-VCO.
3) Adjust the EVR so that DC voltage is DC
1.6±0.05 V.
2. VCOM
1) TP-COM & EVR
2) Connect an voltmeter to TP-COM.
3) Adjust the EVR so that DC voltage is DC
1.45±0.05 V.
3. Brightness
1) TP-COM & EVR
2) Connect an oscilloscope probe to TP-COM.
3) Adjust the EVR so that level is 6.4± 0.1 Vp-p.
Note: In LCD adjustment mode, when shorting
"A" of PCB to GND and pressing the
START/STOP button. Store in EEPROM.
Reset after adjustment is complete.
4. R-Sub Brightness
1) TP-R & EVR
2) Connect an oscilloscope probe to TP-R.
3) Adjust the EVR so that pedestal level is equal to
TP-G level.
5. B-Sub Brightness
1) TP-B & EVR
2) Connect an oscilloscope probe to TP-B.
3) Adjust the EVR so that pedestal level is equal to
TP-G level.
6. Color
a) TP-B & EVR
b) Connect an oscilloscope probe to TP-B.
c) Adjust the EVR so that yellow level is equal to
pedestal level.
LEVEL
(PEDESTAL
TO
PEDESTAL
)
4-2-4 (b) Adjustment
4. Location of Adjustment TP
6.4Vp-p
14P