Mb Board Adjustments - Sony TRINITRON KV-13FM12 Service Manual
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Also See for TRINITRON KV-13FM12:
- Training manual (53 pages) ,
- Operating instructions manual (41 pages) ,
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KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
5-4. MB BOARD ADJUSTMENTS
H. Frequency (Free Run) Check
1. Input a TV mode (RF) with no signal.
2. Connect a frequency counter to base of Q501
(TP500 H. DRIVE).
3. Check H. Frequency for 15735 ± 200 Hz for NTSC,
15650 ± 200 Hz for PAL M,N (KV-14FM12A ONLY)
V. Frequency (Free Run) Check
1. Select video 1 with no signal input.
2. Set the conditions for a standard setting.
3. Connect the frequency counter on the A Board to TP508
(V OUT) or CN501 pin
4. Check that V. Frequency shows 60 ± 4 Hz for NTSC,
50 ± 4 Hz for PAL M,N (KV-14FM12A ONLY)
Drive (RDRV)
1. Input a color-bar signal and set the level to 75%.
2. In Standard mode, set PICTURE to maximum and
COLOR to minimum.
3. Activate the Service Adjustment Mode.
4. Set both GON and BON items. Using
set each to the following values. Leave RON set to "1".
SERVICE
R ON:
ON
G ON:
OFF (0)
B ON:
OFF (0)
5. Select the DCOL item and set it to "0".
6. Connect an oscilloscope probe to CB board, J701 pin
KR (RED OUT).
7. Select RDRV with
8. Adjust the value of RDRV with
70 ± 3 VDC.
9. Reset the item DCOL to "1".
10. Reset GON and BON values to "1".
R ON:
ON
G ON:
ON
B ON:
ON
11. Reset Picture and Color to normal values:
PICTURE:
MAX
COLOR:
CENTER
12. Press
then
(V DY+) and ground.
and
;
RON
1
1: ON
0: OFF
(1)
and
.
and
for
(1)
(1)
(1)
to save into the memory.
Display Position Adjustment (DISP)
1. Input a color-bar signal.
2. Set to Service Adjustment Mode.
3. Select DISP with
4. Adjust values of DISP with
to the center.
5. Write to memory by pressing
6. Check to see if the text is displayed on the screen.
SERVICE
Sub Bright Adjustment (SBRT)
1. Input a monoscope signal.
2. Activate the Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Select the SBRT item with
5. Adjust the values of SBRT with
visible crosshatch.
6. Press
then
Sub Hue, Sub Color Adjustment (SHUE, SCOL)
1. Input a color-bar signal.
2. Activate the Service Adjustment Mode.
3. Select the DCOL item and set the value to "0".
4. Connect an oscilloscope probe to CB board, CN705
Pin
(Blue Out).
5. Select the SHUE and SCOL item with
6. While showing the SHUE item, adjust the waveform with
and
until the second and third bars show the same level
(V2 = V3 < 0.1 Vp-p).
7. While showing the SCOL item, adjust the waveform with
and
until the first and fourth bars show the same level (V1
= V4 < 0.1 Vp-p).
8. Select the DCOL item and reset to 1.
9. Press
then
V. Size Adjustment (VSIZ)
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the VSIZ item with
4. Adjust value of VPOS with
center.
— 24 —
and
.
and
to adjust characters
then
DISP
15
and
.
and
to obtain a faintly
to save into the memory.
and
.
V1
V2 V3
V4
to save into the memory.
and
.
and
for the best vertical
.
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