JVC AV-27320 Service Manual page 22

AV-27320
AV-27330
AV-27S33
ADJUSTMENT OF FOCUS
Measuring
Item
instrument
FOCUS Signal
adjustment
gener ator
ADJUSTMENT OF DEFLECTION CIRCUIT
Measuring
Item
instrument
V. HEIGHT Signal
V. CENTER
gener ator
adjustment
Screen size
Screen
size
(90.0%)
Picture size (100%)
H. CENTER Signal
adjustment
gener ator
22
Test point Ad justment part
FOCUS VR
[In HVT]
Test point Ad justment part
D05 V PHASE
D07 V SIZE
V. CENTER SW
(S401)
[MAIN PWB]
Picture
size
(100%)
D03. H POSI
No. 51937
Description
1. Receive the cross -hatch signal.
2. While looking at the screen, adjust the FOCUS VR to the
vertical and horizontal lines will be clear and in fine detail.
3. Make sure that the picture is in focus even when the screen
gets darkened.
Description
1. Receive the cross -hatch signal.
2. Select the D05 V PHASE of the DEF (D) mode, and it checks
that the value of D05 V PHASE is 0.
3. Adjust the vertic al screen size of the screen top to 90.0% with
the D07 V SIZE and V CENTER SW S401
No . Setting item
D05 V PHASE
D07 V SIZE
1. Receive the cross -hatch signal.
2. Select D03. H POSI from DEF (D) mode.
3. Adjust by H POSITION to be same size at both side.
No . Setting item
D03 H POSI
Variable Initial setting
range value
0～7 0
0～127 55
Variable Initial setting
range value
0 ～ 31
12