JVC AV-32S565 Series Service Manual page 35

4.8 ADJUSTMENT PROCEDURE
4.8.1 CHECK ITEM
Measuring
Item
instrument
B1 VOLTAGE Signal
generator
DC voltmeter
HIGH VOLTAGE Resistor
HOLD DOWN [27.0kΩ ±1%]
S1 CONNECTOR
TP-E
X RAY
DETECT
4.8.2 FOCUS
Measuring
Item
instrument
FOCUS Signal
generator
Remote
control unit
4.8.3 HORIZONTAL FREQUENCY
Measuring
Item
instrument
H. FREQUENCY Signal
generator
Remote
control unit
1-34 (No.YA093)
Test point Adjustment part
S1 connector
1-pin: TP-E
5-pin: TP-91
[POWER &
DEF PWB]
S1 connector
2-pin : X-RAY2
3-pin : X-RAY1
[POWER &
DEF PWB]
RESISTOR
27.0 k 1%
1 2 3 4 5
TP-91
Test point Adjustment part
FOCUS VR(H)
FOCUS VR(V)
[HVT]
H
FOCUS VR(H)
FOCUS
FOCUS VR(V)
V
SCREEN
SCREEN
Test point Adjustment part
[1.PICTURE/SOUND]
D15: H. FREQ.
D18: (Not display)
(DEF RST OUT)
(1) Receive the black and white signal (color off).
(2) Connect the DC voltmeter to the TP-E and TP-
91(B1) of S1 connector.
(3) Confirm that the voltage is DC140V±2.5V.
• After reparing the high voltage hold down circuit. This
circuit shall be checked to operate correctly.
(1) Turn the power switch to on.
(2) Refer to the figure, connect the resistor 27.0kΩ ±1%
between S1 connector 2-pin and 3-pin.
(3) Make sure that the screen picture disappeares.
(4) Disconnect the power plug.
(5) Remove the resistor.
(6) Again connect the power plug.
(7) Turn the power switch to on.
HVT
(8) Make sure that the normal picture is displayed on the
screen.
5
(1) Receive the cross-hatch signal.
(2) While watching the screen, adjust the FOCUS
VR(H) to make the horizontal lines as fine and sharp
as possible.
(3) Then adjust the FOCUS VR(V) to make the vertical
lines as fine and sharp as possible.
(4) Make sure that when the screen is darkened, the
lines remain in good focus.
(1) Receive the any broadcast.
(2) Select 1.PICTURE/SOUND from the SERVICE MODE.
(3) Preset the value from 0 to 1 for the < D18 > (DEF
RST OUT).
(4) Adjust the < D15 >(H. FREQ.) so that an optimum
horizontal synchronization is obtained.
(5) Press [MUTING] key to memorize the set value.
(6) Set the ASPECT to 16 : 9 mode.
(7) Memorize the same value on 16 : 9 mode as will.
(8) After adjustment, return the value from 1 to 0 for the
< D18 >.
(9) Press the [MUTING] key to memorize the set value.
Description
Description
Description