Sharp 32C231, Service Manual

10

32C

231

SERVICE ADJUSTMENT

RF AGC Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service

adjustment "R01".

3. Set the data value to point where no noise or beat

appears.

4. Select another channel to confirm that no noise or

beat appears.
Note 1 :

You will have to come out of the service

mode to select another channel.

Note 2 :

Setting the data to "00" will produce a black

raster.

Screen  Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service

adjustment "V03" and set the data value to "00" to

set the color level to minimum. (Record original data

code under adjustment "V03" before changing) You

may skip this step, if you selected a B/W picture or

monoscope pattern.

3. Select the service adjustment "V11" and adjust the

data value to "01", this turn off the luminance signal

(Y-mute).

4. Adjust the master screen control until the raster

darkens to the point where raster is barely seen.

5. Adjust the service adjustments "V06" red, "V07" green

and "V08" blue to obtain a good grey scale with

normal whites at low brightness level.

6. Select the service adjustment "V11" and reset data

to "00". Select the service adjustment "V03" and reset

data to obtain normal color level.

7. For component input, the data value of "V46" red,

"V47" green and "V48" blue is adjusted to follow the

data value of "V06", "V07" and "V08" respectively.

8. Reset the master screen control to obtain normal

brightness range.

White Balance Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service

adjustment "V03" and set to "00" (minimum

color)(Record original data code under adjustment

"V03" before changing). "V03" does not have to be

adjusted, if you selected a B/W picture or monoscope

pattern.

3. Alternately adjust the service adjustment data of

"V09" and "V10" until a good grey scale with normal

whites is obtained. (RF Input)

4. For component input, the data value of "V49" and

"V50" is adjusted to follow the data value of "V09"

and "V10" respectively.

5. Select the service adjustment "V03" and reset data

to obtain normal color level.

Sub-picture and Sub-Bright Adjustments

1. Receive the window pattern signal.

• 

RF INPUT (TU51)

2. Get into service adjustment data "V01" and "V05" and

set the luminance as shown in figure "A" and "B" as

below respectively.

• 

COMPONENT INPUT

3. Get in service adjustment data "V42" and "V45" and

set the luminance as shown in figure "A" and "B" as

below respectively.

LUMINESCENCE CONFIRMATION

A:   92

±

10cd/m

2

B:   1.1

±

0.5cd/m

2

Sub-Tint Adjustment

1. Receive the half color bar signal.

• 

RF INPUT (TU51)

2. Get into Y-Mute by R/C, or by setting the "V11" bus

data to "01".

3. Vary the "V02" bus data until the waveform becomes

as stated below.

Sub-Color Adjustment

1. Receive a good local channel.

2. Make sure the customer  color control is set to center

position .

• 

RF INPUT (TU51)

3. Enter the service mode and select service adjustment

"V03".

4. Adjust "V03" data value to obtain a normal color level.

Focus Adjustment

1. Receive a good local channel.

2. Adjust the focus VR of the flyback transformer to make

the image as fine as possible.

A

B

B-AMP Base waveform in step
(TP47B)

LEVEL