
No. 51782
AV-32220
20
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■
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ADJUSTMENT
B1 POWER SUPPLY
Item
Measuring
instrument
Test point
Adjustment part
Description
Check of
B1 POWER
SUPPLY
DC Voltmeter B1 (
【
【
【
【
B1
】
】
】
】
Connector
①
①
①
①
pin)
(TP-91)
TP-E(
#
)
(
【
【
【
【
B1
】
】
】
】
Connector
③
③
③
③
pin)
1. Receive a black-and-white signal. (Color off)
2. Connect the DC Voltmeter to
【
B1
】
connector
①
pin (TP-91)
and TP-E(
#
) (B1 connector
③
pin).
3. Confirm that the voltage is DC134V
±
2V.
ADJUSTMENT OF IF. VCO
Item
Measuring
instrument
Test point
Adjustment part
Description
IF VCO
adjustment
Signal
generator
CW TRANSF.
[VCO(CW)] MODE
"
Under normal conditions, no adjustment is required.
1. Receive a NTSC aer. broadcast.
2. Select the VCO (CW) mode from the SERVICE MENU.
3. Confirm the color change (yellow) from
「
HIGH LEVEL
」
to
「
LOW LEVEL
」
by CW TRANSF. and
“
SYNC : YES
”
being
shown on the screen. Then, adjust CW TRANSF. until
「
REFERENCE LEVEL
」
mark turns yellow and confirm again
“
SYNC : YES
”
being shown on the screen.
ADJUSTMENT OF RF AGC
Item
Measuring
instrument
Test point
Adjustment part
Description
RF. AGC
adjustment
No.19 RF AGC
1. Receive
a
broadcast.
2. Select “No.19 RF AGC” of the PICTURE MODE.
3. Press the MUTING key and turn off color.
4. With the MENU LEFT key, get noise in the screen picture. (0
side of setting value)
5. Press the MENU RIGHT key and stop when noise disappears
from the screen.
6. Change to other channels and make sure that there Is no
irregularity.
7. Press the MUTING key and get color out.
ADJUSTMENT OF FOCUS
Item
Measuring
instrument
Test point
Adjustment part
Description
FOCUS
adjustment
Signal
generator
FOCUS VR
[In HVT]
"
SET VIDEO STATUS to “STANDARD”
1. Receive a crosshatch signal.
2. While looking at the screen, adjust FOCUS VR so that the
vertical and horizontal lines will be clear and in fine detail.
3. Make sure that the picture is in focus even when the screen
gets darkened.
Note :
The final adjustment of convergence must be done after the
FOCUS adjustment. (Convergence is changed by FOCUS
adjustment.)
When makes difference by FOCUS adjustment, should be
reconfirming purity adjustment.
HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL
SYNC : YES
YELLOW
Содержание AV-32220/G
Страница 35: ...AV 32220 AV 32220 No 51782 No 51782 3 2 5 2 6 CIRCUIT DIAGRAMS MAIN PWB FRONT CONTROL PWB CIRCUIT DIAGRAM ...
Страница 36: ...AV 32220 AV 32220 No 51782 No 51782 4 50 4 320 2 7 2 8 MAIN PWB CRT SOCKET PWB CIRCUIT DIAGRAM ...
Страница 37: ...AV 32220 AV 32220 No 51782 No 51782 5 54 4 320 2 9 2 10 AV SELECTOR FRONT JACK PWB CIRCUIT DIAGRAM ...
Страница 38: ...AV 32220 AV 32220 No 51782 No 51782 6 TP 91 B1 TP E FRONT 2 11 2 12 PATTERN DIAGRAMS MAIN PWB PATTERN ...
Страница 39: ...AV 32220 AV 32220 No 51782 No 51782 7 TOP 2 13 2 14 AV SELECTOR PWB PATTERN ...
Страница 62: ...No 51782 AV 32220 51 ...