No. 52067
AV-32Z25EUY
AV-28Z25EUY
17
ADJUSTMENTS
CHECK ITEM
Item
Measuring
instrument
Test point
Adjustment part
Description
B1
Power Supply
check
Signal
generator
DC voltmeter
Remote
control unit
TP-91(B1)
TP-E(
#
#
#
#
)
[X connector
on POWER
DEF PWB]
1.RGB BLK
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 fu ( ) 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
4
2.0V.
8. Press the function ( ) key to return to service menu..
High Voltage
check
Signal
generator
DC volunteer
Remote
control unit
CRT anode
Chassis
GND
1.RGB BLK
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 fu ( ) 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.
VCO check
Remote
control unit
1. VCO
"
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 (
5
5
5
5
) position between the ABOVE REF. and
BELOW REF.
+1kV
-1.5kV
TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW
i : EXIT
VCO(CW)
****
MHz
MAIN
1. VCO
2. ATT ON/OFF
i : EXIT
IF SERVICE MENU
1-2 : SELECT
(Do not move)