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4.6
ADJUSTMENT PROCEDURE
4.6.1 CHECK ITEMS
Measuring
Item
instrument
X-RAY
Resistor
PROTECTOR
[6.8kΩ
check
1/4W ±34Ω]
S1
CONNECTOR
1 2 3 4 5
X-RAY2
NC
TP-E
X-RAY1
(
)
HIGH VOLTAGE
Signal
generator
check
HV voltmeter
4.6.2 HORIZONTAL FREQUENCY ADJUSTMENT
Measuring
Item
instrument
H. FREQUENCY
Signal
adjustment
generator
Remote
control unit
unoptimum synchronization
(Horizontal frequency difference)
Test point
Adjustment part
S1 connector
2 pin : X-Ray2
3 pin : X-Ray1
[DEF/
CONVEGENCE
OUT PWB]
TP-91B
139.5V
TP-91
B1
CN008
2
X-RAY
R565
CRT anode
Test point
Adjustment part
[1.PICTURE/SOUND]
D15 : H. FREQ.
D18 : DEF. RST
optimum synchronization
(Horizontal frequency
optimal condition)
(1) Receive NTSC whole black signal.
(2) Connect resistor 6.8kΩ (1/4W, ±34Ω) between 2 pin
& 3 pin of the S1 connector.
(3) Make sure that the screen picture disappears.
(4) Unplug the power cord.
(5) Remove the resistor [6.8kΩ] from S1 connector.
(6) Again plug the power cord, make sure that the
normal picture is displayed on the screen.
RESISTOR
6.8K
34
1/4W
1
2
3
4
5
TP-E
R563
R561
D562
D561
R562
C311
(1) Receive NTSC whole black signal.
(2) Connect the HV voltmeter between CRT anode and
GND.
(3) Check the high voltage DC 31.6kV+1.0kV / -1.5kV.
(1) Receive NTSC crosshatch signal.
(2) Select FULL mode with [ASPECT] key.
(3) Select 1. PICTURE/SOUND from SERVICE MENU.
(4) Select < D18 > (DEF. RST) and change the data 0
to 1 (free run).
(5) While observing the screen, adjust the < D15 >
(H. FREQ) so tha t an optimum hori zo ntal
synchronization is obtained. (see figure)
(6) After adjustment, select < D18 > and change the
data 1 to 0.
(7) Press [MUTING] key to memorize the set value.
Description
SERVICE CONNECTOR
S1
FR311
D311
3
1
Description
(No.YA173)1-43
T502
FBT
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