No. 52027
AV-21Q3
AV-21QMG3
AV-2115EE
21
ADJUSTMENTS
B1 POWER SUPPLY
Item
Measuring
instrument
Test point
Adjustment part
Description
Check of
B1 Power
Supply
Signal
generator
DC Volt-
meter
TP-91 (B1)
TP-E (
#
#
#
#
)
1. Input a whole black signal.
2. Connect a DC voltmeter to TP-91(B1) and TP-E (
#
).
3. Make sure that the voltage is DC116.2
±
2.0V.
FOCUS ADJUSTMENT
Item
Measuring
instrument
Test point
Adjustment part
Description
Adjustment
of FOCUS
Signal
generator
FOCUS VR
[In HVT]
1. Input a cross-hatch signal.
2. While watching the screen, adjust the FOCUS VR to make the
vertical and horizontal lines as fine and sharp as possible.
3. Make sure that when the screen is darkened, the lines remain in
good focus.
IF CIRCUIT ADJUSTMENT
Item
Measuring
instrument
Test point
Adjustment part
Description
●
Please use signal generator which is correct proof about the
sending frequency.
Adjustment
of VCO(CW)
Signal
generator
Remote
control unit
1. VCO
1. Input the PAL full colour bar (210.25MHz) signal.
2. Enter the SERVICE MENU.
3. Select 1.IF from the SERVICE MENU.
4. Press 1 key and select
1.VCO
.
5. Select
VCO ADJUST
with MENU
▲
/
▼
key.
6. Press MENU -/+ key until the colour of the characters TOO
HIGH changes blue to yellow. Then gradually press the MENU
-/+ key until the TOO LOW changes yellow. At this time, confirm
that the value of
VCO ADJUST
is near +00.
7. Select
AFT ADJUST
with MENU
▲
/
▼
key.
8. Press MENU -/+ key until the characters JUST REFERENCE
changes blue to yellow.
9. Press the
DISPLAY
key three times to return to normal screen.
VCO (CW)
***.**
MHz
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
AFT ADJUST
***(**)
***(**)
***(**)
***(**)
VCO ADJUST
***(**)
***(**)
***(**)
***(**)
FINE
DISP : EXIT
YELLOW
Do not adjust
ADJUSTMENT AT THIS POINT IS USELESS
ABOVE REFERENCE
TOO HIGH
BELOW REFERENCE
JUST REFERENCE
TOO LOW
ADJUSTMENT POINT
Содержание AV-2115EE
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