A Board Adjustments - Sony TRINITRON KV-27V42 Service Manual

Feature ID Map
MODEL DEST. ID-0 ID-1 ID-2 ID-3 ID-4 ID-5 ID-6 ID-7
KV-27V42 US
25 151 175 234 11
KV-27V66 US
25 151 237 234 11
KV-27V66 CND
89 151 237 154 11
KV-29SL42K KOREA
137 145 15 203 27
KV-29SL42T TAIWAN
9
KV-29VL42T TAIWAN
9
KV-29XL42T TAIWAN
9

5-4. A BOARD ADJUSTMENTS

H. Frequency Adjustment
1. Input a monoscope signal.
2. Set to Service Adjustment Mode.
3. Connect a frequency counter to base of Q501
(TP-500 H. DRIVE).
4. Select the item of AFC, set to 3 level (free run).
5. Check H. Frequency for the 15735 ± 200 Hz.
6. Select the AFC item again and adjust level to 0.
7. Press then
V. Frequency Adjustment
1. Select video 1 with no signal input.
2. Set the conditions for a standard setting.
3. Connect the frequency counter across TP-508 or CN501
VDY (+) pin connector and ground.
4. Check that V. Frequency shows 60 ± 4 Hz.
Sub Contrast Adjustment (RDRV)
1. Input a color-bar signal.
2. Set the red color.
3. Set to Service Adjustment Mode.
4. Select the item DCOL level to 0.
5. Set the conditions as follows:
PICTURE: MAX
COLOR: MIN
BRIGHT: CENTER
R ON: ON (1)
G ON: OFF (0)
B ON: OFF (0)
SERVICE RON
3 0 64
3 7 64
3 7 64
3 0 64
145 15 203 27 3 0 64
151 175 202 27 3 0 64
145 15 203 27 3 0 64
to save into the memory.
1
1: ON
0: OFF
KV-27V42/27V66/29SL42K/29SL42T/29VL42T/29XL42T
6. Connect an oscilloscope probe to CN301 pin
and ground.
7. Select RDRV with
8. Adjust with and
9. Reset the item DCOL to 1.
10. Return the following back to normal after adjustment.
11. Press then
PICTURE:
COLOR:
BRIGHT:
R ON:
G ON:
B ON:
Display Position Adjustment (DISP)
1. Input a color-bar signal.
2. Set to Service Adjustment Mode.
3. Select DISP with
4. Adjust with and
5. Press then
6. Check to see if the text is displayed on the screen.
SERVICE
Sub Bright Adjustment (SBRT)
1. Input a crosshatch signal.
2. Set to Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Select the SBRT item with
5. Adjust with and
6. Press then
— 21 —
(R OUT)
and .
for 1.75 ± 0.05 Vp-p
White
1.75 ± 0.05 Vp-p
Black
to save into the memory.
MAX
CENTER
CENTER
ON (1)
ON (1)
ON (1)
and .
to adjust characters to the center.
to save into the memory.
DISP 15
and .
to obtain a faintly visible crosshatch.
to save into the memory.