Panasonic BT-M2090Y Service Manual page 34

BT-M2090Y
Item
HVC
H gain
(NTSC)
H center
H gain
(PAL)
V gain, V
center, V
linearity
(NTSC)
V gain, V
center, V
linearity
(PAL)
Side
pincushion
(NTSC/PAL)
Test
equipment
Voltmeter
Signal generator
(All-black signal)
Signal generator
(Resolution or
crosshatch pattern)
Signal generator
(Resolution or
crosshatch pattern)
Signal generator
( Resolution
pattern)
Signal generator
(Resolution pattern)
Signal generator
(Crosshatch
NTSC/PAL)
Test points
TP-HV
Adjustment
locations
R612(HVC)
[Deflection PWBJ
D05(H SIZE)
D21(H SIZE)
D22(H SHIFT)
[SERVICE MENU)
D15(H SHIFT)
D14(H SIZE)
[SERVICE MENU]
D03(V
LINEARITY)
D01(V SIZE)
D17(V SIZE)
D19(V
LINEARITY)
D18(V SHIFT)
[SERVICE MENU]
D11(V SHIFT)
D12(V
LINEARITY)
D10(V SIZE)
[SERVICE MENU]
D07(PIN AMP)
D23(PIN AMP)
D16(PIN AMP)
[SERVICE MENU]
-34-
Adjustment procedure
1. Set Ext Sync to Ext and supply a horizontal sync
signal input.
2. When the raster appears, reduce the Bright
control.
3. Connect the voltmeter to TP-HV.
4. Adjust R612 (HVC) for 2.0
±
0.1 V.
1. At the
service
menu, set D05 to adjust the
horizontal size to 95 %.
2. Set the Scan Size to Under.
3. Set D21 to
oo.
4. Set D22 to 253.
5. Return the Scan Size to normal.
1. Adjust D15 to align the picture center with the
CRT center.
2. Adjust D14 to set the horizontal size to 95 %.
1. Check that the horizontal line of the video signal
center is at the CRT center (if shifted, adjust
R416).
2. Adjust the picture vertical linearity (scan ratio)
with D03.
3. Adjust the screen top and bottom edges to 95 %
with D01.
4. Set the Scan Size to Under.
5. Set D17 to 230.
6. Set D19 to
oo.
7. Set D18 to
oo.
8. Return the Scan Size to normal.
1. Adjust D11 to align the video signal center with
the CRT center.
2. Adjust the picture vertical linearity (scan ratio)
with D12.
3. Adjust the screen top and bottom edges to 95 %
with D10.
1. Adjust side pincushion with D07 so that A = B.
2. Set the Scan Size to Under.
3. Adjust side pincushion with D23 so that A = B.
4. Supply a PAL crosshatch input.
5. Return the Scan Size to normal.
6. Adjust side pincushion with D16 so that A = B .
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