Trident IS-TVHD30, Service Manual

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In the factory menu, select Vertical setting menu, adjust the V POS, until the picture V-center and
screen center accord.
d. V-SCANNING adjustment
In the factory menu, select Vertical setting menu, adjust the V SIZE, until up and down over
scanning of the picture to 8% of the all screen.
e. Raster correction and horizontal amplitude adjustment
Receive white grid of NTSC signal, the picture mode to “STANDARD” in the factory menu, select
horizontal setting menu, adjust the PCC, until the raster distort least, adjust the H SIZE, until right
and left over scanning of the picture to 8% of the all screen.
f. If the scanning line distortion and raster geometric distortion dissatisfy condition, you can adjust
the factory menu item
SCOR S-Correction
CCOR
C-Correction
PCAC Pin Cushion Asymmetry Correction
PCC Pin Cushion Correction
KEYST Keystone Correction
PARAL Parallelogram Correction
TCC
Top Corner Correction
BCC Bottom Corner Correction
4.12.2 YPbPr input (1080I/60Hz format signal)
Adjustment mode to 4.12.1
5. Check point
5.1 check the high voltage
a. Check the second anode and GND connect to the high voltmeter
b. Receive US-7 signal, the picture mode to STANDARD, measure the high voltage to
30.0KV+/-1KV.
c. The brightness and contrast to min value, while measure the high voltage no more than 35KV.
5.2 check the CRT Filament voltage
Receive the US-7 signal, the picture mode to STANDARD item, measure the CRT filament voltage
to be 6.3+/-0.2Vrms.
5.3 Check the X-ray protection
a. Receive the US-7 signal, the picture to STANDARD item.
b. Connect TP1 to TP2 point of short circuit; X-ray protection circuit must be operation.
5.4 Check the picture part
5.5 Check the sub-brightness
5.6 Check chromatic purity and converge
5.7 Check the VIDEO and audio input/output
5.8 Check the unit and the remote control function
6. Ex-factory pre-setting
7. Check the supply power (AC 100V-140V/60Hz)