AV-48WP74
AV-56WP74
1-46 (No.52105)
3.8 ADJUSTMENT PROCEDURE
3.8.1 CHECK ITEMS
3.8.2 HORIZONTAL FREQUENCY ADJUSTMENT
Item
Measuring
instrument
Test point
Adjustment part
Description
HIGH VOLTAGE
check
Signal
generator
High voltage
meter
CRT Anode
(1) Receive NTSC whole black signal.
(2) Connect the high voltage meter between CRT anode
and GND.
(3) Check that the high voltage range DC 31.0kV±1.0kV.
X-RAY
PROTECTOR
check
Resistor
[6.8k ohm
1/4W ±5%]
S1 connector
2 pin : X-Ray2
3 pin : X-Ray1
(1) Receive any broadcast.
(2) Connect resistor 6.8k ohm(1/4W, ±5%) between 2 pin
& 3 pin of the connector S1.
(3) Confirm that the X-RAY protector functions operated.
Item
Measuring
instrument
Test point
Adjustment part
Description
H. FREQUENCY
adjustment
Signal
generator
Remote
control unit
[1.PICTURE/SOUND]
D15 : H. FREQ.
D19 : DEF. RST
(1) Receive any broadcast.
(2) Press [ASPECT] key and select FULL mode.
(3) Select 1. PICTURE/SOUND from SERVICE MENU.
(4) Select <D19> (DEF. RST) and change the data 0 to 1.
(5) While observing the screen, adjust the <D15> (H.
FREQ) so that an optimum horizontal synchronization
is obtained.
(6) After adjustment, select <D19> and change the data
1 to 0.
(7) Press [MUTING] key to memorize the set value.