Sanyo HT28745 Service Manual page 17

PINCUSHION CORRECTION ADJUSTMENT
1. Connect a color-bar generator to the analog antenna
terminal and select a crosshatch pattern.
2. Set the picture controls to the Sports level.
3. Turn off the receiver and disconnect the AC power cord
(AC 120V line).
4. While pressing the VOLUME – key, reconnect the AC
power cord. The Service Menu will now appear.
5. Select the items below with L or M key according to the
symptoms of Figure 8.
NO. ITEM Bit
11A PAP2 7 - 2
11D PPH2 7 - 2
11F ABO2 7 - 2
120 AAN2 7 - 2
11B UCP2 7 - 2
11C LCP2 7 - 2
Upper Corner Pin
Lower Corner Pin
Figure 8. Pincushion Adjustments
6. Adjust the data with numeric keys for straight vertical
lines. To turn off the Service Menu display, press the
MENU key.
NAME
Pin AMP
Pin Phase
AFC Bow
AFC Angle
Upper Corner Pin
Lower Corner Pin
Pin AMP
Pin Phase
AFC Bow
AFC Angle
OSD ADJUSTMENT
1. Connect a color-bar generator to the analog antenna
terminal.
2. Set the picture controls to the Sports level.
3. Turn off the receiver and disconnect the AC power cord.
(120V AC line)
4. While pressing the VOLUME – key, reconnect the AC
power cord. The Service Menu display will now appear.
5. Select NO. 089 (OSD: On-Screen Display) with L or M
key.
6. Adjust the + or – key for proper position shown in
Figure 9. To turn off the Service Menu display, press the
MENU key.
50mm
COMPONENT Y LEVEL CONFIRM
1. Connect a color-bar generator to the analog antenna
terminal.
2. Switch the generator to the color-bar (NTSC) pattern.
3. Connect oscilloscope probe to Connector KG pin 8 and
ground on the main board.
4. Confirm a reading of 0.7 Vp-p ± .05. See Figure 10.
5. If Y Level is out of specification, enter the Service Menu
and select item 05E Contrast Data.
6. Adjust data with numeric keys. Keep data within ±2
steps of the Initial Setup Data 38H.
— 17 —
Visible
Area
091
OSD 03 00000011
Figure 9.
Figure 10.
0.7 Vp-p