JVC AV-48WP34/AHA Service Manual page 39

ADJUSTMENT
CHECK ITEMS
Measuring
Item
Instrument
B1 Signal generator
POWER SUPPLY
check DC Voltmeter
HIGH VOLTAGE Signal generator
check
High Voltage
meter
X-RAY Resistor
6.8kΩ Ω Ω Ω 1/6W
PROTECTOR
check
± ± ± ± 5%
H.FREQUENCY Signal
check generator
Remote
control unit
Test point Adjustment Item
S1 connector
5 pin:TP-91
#
1 pin:TP-E ( )
CRT Anode
S1 connector
2 pin:X-Ray2
3 pin:X-Ray1
D15 : H.FREQ.
D19 : DEF.RST
No. 51914
Description
1. Receive a black and white signal (color off).
2. Connect the DC voltmeter to S1 connector 5 pin (TP-
# # # #
91) and TP-E( ) (S1 connector 1 pin).
3. Confirm that the voltage is DC140V ± 2V.
1. Receive a white black signal.
2. Connect the high voltage meter between CRT anode
and GND.
3. Check that the High Voltage DC 31.0kV ±1.0kV.
1. Connect resistor 6.8k Ω (1/6W, ± 5%) between
2. 2 pin & 3 pin of the connector S1.
3. Confirm that the X-RAY protector functions operated.
1. Receive the black & white signal.
2. Preset from 0 to 1 for D19 ＜ DEF RST ＞ , to adjust D15:
H.FREQ. and memorize data with MUTING key.
3. After adjustment, to preset from 1 to 0 for D19: DEF
RST and Press the MUTING key to memorize data.
AV-48WP30
33