JVC AV28CT1EKS Service Manual page 9

AV28CT1EKS / AV28CT1EKB
AV28CT1EPS / AV28CT1EPB
AV28CT1EIS
ADJUSTMENTS
CHECK ITEM
Measuring
Item
instrument
Check of B1 Signal
generator
Power Supply
DC voltm eter
Remote
control unit
Check of High Signal
Voltage generator
DC volunteer
Remote
control unit
ADJUSTMENT OF FOCUS
Measuring
Item
instrument
Ad justment of Signal
FOCUS gener ator
18
Test point Ad justment part
TP-91(B1)
TP-E(# # # # )
[X connector
on POWER
DEF PWB]
CRT anode
Chassis GND
Test point Ad justment part
FOCUS VR
[In FBT]
FOCUS VR
SCREEN VR
1. Receive a any broadcast.
2. Push the "ZOOM" key and s elect the FULL mode.
3. Select 2.V/C from the SERVICE MENU.
4. Select 1. CUT OFF with Function UP/DOW N k ey.
5. Show one horizontal line with the 1 key.
6. Turn the SCREEN VR, the whole blac k screen display.
7. Connect a DC voltmeter to TP-91(B1) and TP-E( # ).
8. Make sure that the voltage is DC144.5 ± 2.0V.
9. Readjust the SCREEN VR to appear the horizontal line faintly,
and cancel the horizontal line to press the 2 key.
1. Receive a any broadcast.
2. Push the "ZOOM" key and s elect the FULL mode.
3. Select 2.V/C from the SERVICE MENU.
4. Select 1.CUT OFF with Function UP/DOWN key.
5. Show one horizontal line with the 1 k ey.
6. Turn the SCREEN VR, the whole blac k screen display.
7. Connect a DC voltmeter to CRT ANODE and chassis GND.
8. Make sure that the voltage is DC 30.0kV
9. Readjust the SCREEN VR to appear the horizontal line faintly,
and c onnect the horizontal line to press 2 key.
1. Receive a cross-hatch signal. Select FULL mode.
2. While watc hing the screen, adjust the FOCUS VR to make the
vertical and horizontal lines as fine and sharp as possible.
3. Make sure that when the sc reen is darkened, the lines remain
in good focus.
No. 51952
Description
+1kV
.
-1.5kV
Description