Sanyo CE32WN4 Service Manual page 8

SERVICE ADJUSTMENTS
[ADJUSTMENTS]
To adjust each service data, please see "SERVICE ADJUSTMENT" on pages 8&9 for entering the service mode ,
selecting service item and adjusting the service data value.
IMPORTANT NOTICE
Do not attempt to adjust the following service adjustments except requiring the readjustments in servicing
otherwise it may cause loss of performance and product safety.
+B ADJUSTMENT
1. Receive white raster pattern.
2. Set controls to normal.
3. Connect digital voltmeter to test point TP-B and GND.
4. Adjust voltage to 150 ±0.5V by using VR641 (28").
RF-AGC ADJUSTMENT
1. Input and tune an RF signal which is VHF ch05
175.25MHz with 63dBuV/75Ω terminated signal gain.
2. Connect digital voltmeter to test point TP-A and GND.
3. Enter the service mode and select mode "Regular",
and select item "01 AGC".
4. Press the LEVEL+ or LEVEL - button to adjust
voltage to be 3.2Vdc.
FOCUS ADJUSTMENT
By using FOCUS VR, adjust focus control for well defined
scanning lines.
GREY SCALE ADJUSTMENT
CUT-OFF ADJUSTMENT
1. Select AV mode with no signal input.
2. Enter the service mode and select mode "Regular",
item "02". The horizontal line will appear on the
screen.
3. Adjust the Screen VR on the FBT to obtain the one
colour to be just visible.
4. By using the buttons 1, 2, 4, 5, 7, 8 on the remote
control, adjust the line to be white.
The key allocation is as follows;
Button No. Operation
1 Increase Red
2 Decrease Red
4 Increase Green
5 Decrease Green
7 Increase Blue
8 Decrease Blue
EB6-D chassis
DRIVE ADJUSTMENT
5. Receive the white raster signal.
6. Select item "03 GRY".
7. Adjust [R-Drive] and [B-Drive] control to obtain proper
white balance by using LEVEL+ or LEVEL - button.
a) Select [R-Drive] or [B-Drive] by using the P
P button.
b) Adjust [R-Drive] or [B-Drive] by using the LEVEL+
or LEVEL - button.
Regular
03 GRY
3F
HORIZONTAL POSITION ADJUSTMENT
1. Receive circular pattern .
2. Enter the service mode and select mode "Image", item
"02 P H-P".
3. Press the LEVEL+ or LEVEL - button to adjust
horizontal centre.
HORIZONTAL WIDTH ADJUSTMENT
1. Receive circular pattern and set screen mode to
"FULL".
2. Enter the service mode and select "Image", and item
"06.P H-S".
3. Press the LEVEL+ or LEVEL - button to adjust the
horizontal width.
8
[R-Drive]
3F
[B-Drive]
Adjustable Range:
00 ~ 3F ~ FF
or