JVC InteriArt Natural Vision T-V LINK AV-28WFR1EK, Service Manual

Page: 22 / 65

No. 51729
AV-29RX
18
ADJUSTMENTS
CHECK ITEMS BEFORE ADJUSTMENTS
Item
Measuring
instrument
Test point Adjustment part Description
Check of B1
Power Supply
Signal
generator
DC voltmeter
TP-91(B1)
TP-E(
! ! ! !
)
[X Connector
on POWER &
DEF PWB]
1. Input the black and white signal.
2. Select 2. V/C from the SERVICE MENU.
3. Select 1. CUT OFF with MENU UP / DOWN key.
4. Show one horizontal line by pressing the 1 key.
5. Turn the SCREEN VR until not to display the one horizontal line.
6. Connect the DC voltmeter to TP-91(B1) and TP-E(
!
).
7. Make sure that the voltage is DC134.0
±
2.0V.
8. Readjust the SCREEN VR to appear the horizontal line faintly,
and cancel the horizontal line by pressing the 2 key.
Check of High
Voltage
Signal
generator
High voltage
meter
CRT anode 1. Input the black and white signal.
2. Select 2. V/C from the SERVICE MENU.
3. Select 1. CUT OFF with MENU UP / DOWN key.
4. Show one horizontal line by pressing the 1 key.
5. Turn the SCREEN VR until not to display the one horizontal line.
6. Connect a High voltage meter to CRT ANODE.
7. Make sure that the voltage is DC 32.0kV
±
1.5kV.
8. Readjust the SCREEN VR to appear the horizontal line faintly,
and cancel the horizontal line by pressing 2 key.
FOCUS ADJUSTMENT
Item
Measuring
instrument
Test point Adjustment part Description
Adjustment of
FOCUS
Signal
generator
FOCUS 1 VR
[In HVT]
1. Input the cross-hatch signal.
2. By turning the FOCUS VR, adjust the picture so that the center
horizontal line of the cross-hatch picture becomes thinnest.
3. Then turning the FOCUS VR, adjust the focus of the vertical line
at most outside becomes as thin as possible.
4. Carry out adjustment by repeating the steps 2 and 3 above.
5. Make sure that when the screen is darkened, the lines remain in
good focus.
FOCUS
FOCUS