JVC HV-53PRO/K Service Manual page 24

HV-53PRO
ADJUSTMENT
■ ■ ■ ■ CHECKING ITEM
Measuring
Item
instrument
Check of B1 Signal
Power Supply Generator
DC voltmeter
Remote
Control unit
Check of High Signal
Voltage Generator
HV voltmeter
Remote
Control unit
Check of VCO Remote
control unit
IF SERVICE MENU
1. VCO
2. ATT ON/OFF
1-2 : SELECT
VCO(CW)
MAIN
TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW
24
Test point Adjustment part
TP-91(B1) 1. RGB BLK
(1 1 pin)
1 1
TP-E( )
(5 5 pin)
5 5
[S1
connector on
the POWER
& DEF PWB]
CRT anode 1. RGB BLK
1. VCO
2. ATT ON/OFF
DISP : EXIT
Change by OK
**** MHz
key
SUB
DISP : EXIT
1. Receive any broadcast.
2. Press the ZOOM key and select the REGULAR mode.
3. Select 2. V / C from the SERVICE MENU.
4. Select 1. RGB BLK with function UP / DOWN( ▲ / ▼ ) key.
5. Press the function RIGHT(
(Black screen).
6. Connect a DC voltmeter to TP-91(B1) and TP-E( ).
7. Make sure that the voltage is DC140.0V ± 2.0V.
8. Press the function LEFT(
1. Receive any broadcast.
2. Press the ZOOM key and select the FULL mode.
3. Select 2. V / C from the SERVICE MENU.
0. Select 1. RGB BLK with function UP / DOWN( ▲ / ▼ ) key.
5. Press the function RIGHT(
(Black screen).
6. Connect a HV voltmeter to CRT ANODE and chassis GND.
7. Make sure that the voltage is DC 31.0kV
8. Press the function LEFT(
Remove the probe before removing the earth clip.
*
Under normal conditions, no adjustment is required.
Confirmation adjustment.
1. Select 1.IF from the SERVICE MENU.
2. Then select 1.VCO from the IF SERVICE MENU.
3. Receive any broadcast.
4. Check the MAIN arrow (
REF. and BELOW REF.
5. Press the MENU (OK) key and receive any broadcast with PIP
Button.
6. Check the SUB arrow (
and BELOW REF.
The arrow ( ) position means AFC voltage level.
*
* 2. ATT ON / OFF
Change the MAIN and SUB by MENU / OK key .
*
No. 51984
Description
) key to find the cut off screen
) key to return to service menu.
) key to find the cut off screen
+1kV
.
-1.5kV
) key to return to service menu.
) position between the ABOVE
) position between the ABOVE REF
: Generally Electric Field : OFF
: Strong Electric Field : ON