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ADJUSTMENTS
For initial setting values not shown in each item of the adjustments, refer to the "INITIAL SETTING VALUE OF SERVICE MENU".
B1 POWER SUPPLY
Measuring
Item
instrument
Check of
Signal
B1 Power
generator
Supply
DC Volt-
meter
FOCUS ADJUSTMENT
Measuring
Item
instrument
Adjustment
Signal
of FOCUS
generator
IF CIRCUIT ADJUSTMENT
Measuring
Item
instrument
Adjustment
Remote
of VCO(CW)
control unit
VCO (CW)
TOO HIGH
ABOVE REFERENCE
JUST REFERRENCE
BELOW REFERENCE
TOO LOW
AFT ADJUST
VCO ADJUST
FINE
ADJUSTMENT ITEM
VCO ADJUST
AFT ADJUST
SET-UP VALUE
Test point
Adjustment part
TP-91 (B1)
TP-E (
)
Test point
Adjustment part
FOCUS VR
[In FBT]
Test point
Adjustment part
VCO(CW)
TRANSF.
* * *
* *
.
MHz
fv
YELLOW
YELLOW colour
menus the
* * ( * * )
* * ( * * )
* * ( * * )
* * ( * * )
position of AFC
* * ( * * )
* * ( * * )
* * ( * * )
* * ( * * )
voltage.
Do not adjust
DISP : EXIT
SET-UP
VALUE
+00( ** )
+00( ** )
1. Receive a whole black signal.
2. Connect a DC voltmeter to TP-91(B1) and TP-E ( ).
3. Make sure that the voltage is DC114.5 ± 1.5V.
1. Receive 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.
It must not adjust without signal.
1. Receive a COLOUR BAR SIGNAL
2. Select 1. IF from the SERVICE MENU.
3. Press 1 key and select 1. VCO (CW) to display VCO (CW)
SCREEN.
4. Select VCO ADJUST with MENU ▼ / ▲ key and make sure
that the set-up value is shown as +00. Then check the items 5
and 6 below.
5. With -/+ MENU key, change the value from +00 to -01 and
make sure that the colour of the characters TOO LOW
changes to YELLOW. Then return the value to +00.
6. With -/+ MENU key, change the value from +00 to +01 and
make sure that the colour of the characters TOO HIGH
changes to YELLOW. Then return the value to +00.
7. Select AFT ADJUST with MENU ▼ / ▲ key. Then press -/+
MENU key until the characters JUST REFERENCE changes
from blue to YELLOW.
8. Press the DISPLAY key three times to return to normal
screen.
◆ If you cannot check the colour change of the characters within
the range of ± 01 as explained in item 5 and 6 above, use the
± ± ± ± 02 range for checking.
No. 51669
AV-A14M3
AV-A14T3
AV-A14AU3
AV-1413EE
Description
Description
Description
(210.25MHz).
17
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