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Video unit (X35-4250-00)
• Start a set in test mode at the time of video board adjustment.
• How to enter to test mode : Pushing operation of 2 keys right (clock)-and-left (image adj.) both ends side and a touch panel. And
supply to power is ON.
• After starting : perform substrate adjustment for a video board by a design mode → VIDEO ADJ key with reference to the
following item.
• Adjust a picture position by After starting : (AUX) Manufacture mode → POSI (NAVI)
• VIDEO ADJ mode : it is the rectangle color frog of middle at the time of adjustment item selection. It is considered as an
adjustment end by choosing a rectangle again after adjustment.
No.
Adjustment item
1
Inverter power
It is considered as Bright : DUTY 100% after
regulation
VIDEO ADJ - key selection.
The voltage of TP577 at this time is adjusted to
7.5±0.1V.
2
Timing
f Consider it as microcomputer : SYNC (9 pin :
TP138 of IC102) MUTE → H after Adj key
controller
free-run
selection.
frequency
VR101 (H-FREE) is turned and the frequency
of the NDSH output at this time is adjusted to
15.734±0.01kHz.
3
Chrome IC
It is made the chroma IC adjustment mode of
adjustment
a static test mode.
3-A
Chrome VCO
1 of IC202, 4, and 5 pin are dropped on GND,
adjustment
and a touch panel adjusts TP320 in f shop
counter.
- Carry out the monitor of TP138 of IC102, and
adjust VR101 in f shop counter.
3-B
Black limiter
Carry out the monitor of the waveform of TP527
with an oscilloscope.
Adjst the amplitude value so that the waveform
between the pedestal to the negative pedestal
is 3.5V±0.1V.
3-C
White limiter
Carry out the monitor of the waveform of TP527
with an oscilloscope.
Adjst the amplitude value so that the waveform
between the 8 step signal to the negative 8 step
signal is 3.5V±0.1V.
ADJUSTMENT
The adjustment method
FGZ201ELF2/ERF2
Adjustment
Adjustment value
part
VR30
7.5±0.1V
VR101
15.734±0.01kHz
-
-
CH16
15.734±0.01kHz
CH5
3.5V±0.1V
CH10
3.5V±0.1V
Conditions
Test point
-
TP577
Input selector :
TP138
AUX input
non-signal
Input selector :
-
AUX or RGB
An input
TP320
non-signal
Incoming signal :
TP527
10 STEP (NTSC)
/RGB
Incoming signal :
TP527
10 STEP (NTSC)
/RGB
15
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