Sharp PZ-43MR2E, Service Manual

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PZ-43MR2E
PZ-50MR2E
6. Procedures before and after replacing the PC I/F unit
1) Before replacing the PC I/F unit, write down the values for the parameters listed on the 2nd and 3rd pages of
the Adjustment Process A screen.
If the values for the parameters cannot be written down because the PC I/F unit is completely broken or for any
other reason, make all the adjustments in accordance with the paragraph for Adjustment procedure and
parameters, rather than the following procedures. (End)
Set the parameters listed on the 2nd and 3rd pages of the Adjustment Process A screen to the values you have
written down.
7. Adjustment parameters
1) Analog adjustment
(1) Prior adjustment for AVC system chassis
(2) PAL signal adjustment
1 Destination check 1. Call the process adjustment mode.
2. Check that the destination is “Europe”.
Adjustment item Description Adjustment procedure
2 AVC center 3.3V
adjustment
Connect DC voltmeter to
TP1702.
Adjust output voltage of DC/DC 5 V line to
3.3 V.
Adjusted value: 3.25~3.29 V
3 AVC center 2.5V
adjustment
Connect DC voltmeter to
TP1701.
Adjust output voltage of DC/DC 2.5 V line to
2.6 V.
Adjusted value: 2.60~2.64 V
1 Setup 1. Set colour system to “PAL”.
2. Select PAL source.
100% colour bar signal including 100% white, such
as split field colour bar
Adjustment item Description Adjustment procedure
2 Tuner Y 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).
3 PAL Y CONTRAST
adjustment 1. Adjust TB1274_MAIN output (TP803) to
0.7 ±0.05 Vp-p.
4 PAL COLOR GAIN
adjustment 1. Adjust TB1274_MAIN
output (TP802) to
0.35 ±0.025 Vp-p.
5 MAIN CR GAIN PAL
adjustment 1. Adjust TB1274_MAIN output
(TP801) to 0.35 ±0.05 Vp-p.
6 MAIN CONTRAST
adjustment Turn off the PEAK ACL control. Adjust the output
(TP815) of IC810 to have 1.1 ±0.05 Vp-p from the
pedestal level.
Press the DUAL screen button. Select the special DUAL screen settings for adjustment
(so that the same video source is reflected on MAIN/
SUB).
7 SUB PAL Y adjustment 1. Adjust TB1274_SUB output (TP806) to
0.9 ±0.05 Vp-p.
8 SUB PAL COLOR
GAIN adjustment 1. Adjust TB1274_SUB output (TP805) to
0.9 ±0.05 Vp-p.
0.35V
0.35V