Sharp 27SC260R, Service Manual

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

darkness 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. For digital RF input, the data value of "V76" red, "V77"

green and "V78" blue is adjusted to follow the data
value of "V06", "V07" and "V08" respectively.

9. Reset the master screen control to obtain normal

brightness range.

A

B

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. For digital RF input, the data value of "V79" and "V80"

is adjusted to follow the data value of "V09" and "V10"
respectively.

6. 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 (TU1101)

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: 120

±

10cd/m

2

B: 1.5

±

0.5cd/m

2

• 

DIGITAL RF INPUT (TU1101)

4. Get in service adjustment data "V72", "V75" and set

the luminance as shown in figure "A" and "B" as above
respectively.

NECESSARY

UNNECESSARY

ADJUSTMENT

PART REPLACED

IC2001

IC201

X

Data is stored in IC2101.

The adjustment is needed to compensate for characteristics of parts
including IC201 and MTS level (M01).

Holding down both the VOL-up and CH-up buttons on the TV set at service mode for more than 2 seconds will
automatically write the above initial values into IC2101.

NOTES

X

IC2101

IC3001

CRT

Holding down both the VOL-up and CH-up buttons on the TV set in
the service mode for more than 2 seconds will automatically write the
above initial values into IC2101 Then perform a complete adjustment.

Adjust items related to picture tube only.

Adjust items related to MTS only (M01~M05).

X

X

X

9

27SC260R