Read Sharp LC-30HV4E (serv.man8) Service Manual online
21
LC-30HV4E
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Adjustment parameters
1) Analog adjustment
(1) AVC System voltage adjustment
(2) PAL signal adjustment
1
In-process adjustment
mode
(Check the destination.)
mode
(Check the destination.)
Using the In-process adjustment remote controller,
enter the in-process adjustments mode.
Check that the destination is EUROPE.
enter the in-process adjustments mode.
Check that the destination is EUROPE.
Adjustment items
Adjustment conditions
Adjustment procedures
2
AVC center 3.3V
adjustment
adjustment
Connect a DC voltmeter to TP4
at the opening on the top of the
PC I/F unit.
at the opening on the top of the
PC I/F unit.
Move the cursor to the [
Ë
+Badj3.3V] line and adjust
the TP4 voltage to 3.25±0.01V.
3
AVC center 1.8V
adjustment
adjustment
Connect DC voltmeter to
TP1701.
TP1701.
Move the cursor to the [
Ë
+BAdj1.8V] line and press
OK.
Adjustment is complete if [
Adjustment is complete if [
Ë
+BAdj1.8V complete]
appears.
If ERR occurs, adjust pin 6 at CN9 on the PC I/F unit
so that 1.8V is reached.
If ERR occurs, adjust pin 6 at CN9 on the PC I/F unit
so that 1.8V is reached.
1
Setup
1. Set colour system to “PAL”.
2. Select PAL source.
2. Select PAL source.
100% colour bar signal including 100% white, such
as split field colour bar
as split field colour bar
Adjustment items
Adjustment conditions
Adjustment procedures
2
Tuner level adjustment
1. Adjust TP1101 so that the Y signal without the
chroma component should be 1.00 ±0.05 Vp-p
(between the bottom of sync signal and the white
peak).
(between the bottom of sync signal and the white
peak).
Connect the oscilloscope to
TP1101.
TP1101.
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