— 24 —
KV-20FS12/20FV12/21FE12/A/C/21FM12/21FV12/C
4. Set both GON and BON items. Using
and
;
set each to the following values. Leave RON set to “1”.
SERVICE RON 1
1: ON
0: OFF
R ON: ON (1)
G ON: OFF (0)
B ON: OFF (0)
5. Select the DCOL item and set it to “0”.
6. Connect an oscilloscope probe to C board, J701 pin 12
(KR) (RED OUT).
7. Select RDRV with
and
.
8. Adjust the value of RDRV with
and
for
86.5 ± 2 VDC.
86.5 ± 2 VDC
9. Reset the item DCOL to “1”.
10. Reset GON and BON values to “1”.
R ON: ON (1)
G ON: ON (1)
B ON: ON (1)
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
(TP-500 H. DRIVE).
3. Check H. Frequency for 15735 ± 200 Hz, and 15650 ± 200
Hz for PAL-N (KV-21FE12A 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 TP-508
(V OUT) or CN 501 pin
(V DY+) and ground.
4. Check that V. Frequency shows 60 ± 4 Hz
for NTSC, 50 ± 4 Hz for PAL-N (KV-21FE12A ONLY).
Drive (RDRV) Adjustments
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.
11. Reset Picture and Color to normal values:
PICTURE:
MAX
COLOR: CENTER
12. Press
then
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
and
.
4. Adjust values of DISP with
and
to adjust characters
to the center.
5. Write to memory by pressing
then
.
6. Check to see if the text is displayed on the screen.
SERVICE DISP 15
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
and
.
5. Adjust the values of SBRT with
and
to obtain a
faintly visible crosshatch.
6. Press
then
to save into the memory.
Sub Hue, Sub Color Adjustment (SHUE, SCOL)
1. Input a color-bar signal and set level to 75%.
2. Activate the Service Adjustment Mode.
3. Select the DCOL item and set the value to “0”.
4. Connect an oscilloscope probe to C Board, CN1752
Pin
.
5. Select the SHUE and SCOL item with
and
.
6. While showing the SHUE item, adjust the waveform with
and
until the second and third bars show the same level
(V2 = V3 ± 0.2 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 ± 0.2 Vp-p).
8. Input RF PAL-M and PAL-N color-bar and repeat steps 1-
7 for each. (KV-21FC12A ONLY).
V1 V2 V3 V4
Содержание FD TRINITRON WEGA KV-20FS12
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Страница 73: ... 19 KV 20FS12 20FV12 21FE12 A C 21FM12 21FV12 C ...
