JVC AV-32Z25EUY Service Manual page 17

ADJUSTMENTS
CHECK ITEM
Measuring
Item
instrument
B1 Signal
Power Supply generator
check
DC voltmeter
Remote
control unit
High Voltage Signal
check generator
DC volunteer
Remote
control unit
VCO check 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
Test point Adjustment part
TP-91(B1) 1.RGB BLK
TP-E(# # # # )
[X connector
on POWER
DEF PWB]
CRT anode 1.RGB BLK
Chassis
GND
1. VCO
(Do not move)
i : EXIT
****MHz
i : EXIT
No. 52067
Description
1. Receive a any broadcast.
2. Push the "ZOOM" key and select the FULL mode.
3. Select 2. V/C from the SERVICE MENU.
4. Select 1. RGB BLK with function UP / DOWN ( / ) key.
5. Press the function + ( ) key to find the cut off screen (Black
screen).
6. Connect a DC voltmeter to TP-91(B1) and TP-E(#).
7. Make sure that the voltage is DC139.9 ±2.0V.
8. Press the function – ( ) key to return to service menu..
1. Receive a any broadcast.
2. Push the "ZOOM" key and select the FULL mode.
3. Select 2. V/C from the SERVICE MENU.
4. Select 1. RGB BLK with function UP / DOWN ( / ) key.
5. Press the function + ( ) key to find the cut off screen (Black
screen).
6. Connect a DC voltmeter to CRT ANODE and chassis GND.
7. Make sure that the voltage is DC 31.0kV
8. Press the function – ( ) key to return to service menu.
" 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 arrow (← ← ← ← ) position between the ABOVE REF. and
BELOW REF.
AV-32Z25EUY
AV-28Z25EUY
+1kV
.
-1.5kV
17