JVC AV-27FA44/BSA Service Manual page 74

4.7.3 FOCUS
Measuring
Item
instrument
FOCUS Signal
generator
4.7.4 DEFLECTION CIRCUIT
• The setting (adjustment) using the remote control unit is made on the basis of the initial setting values.
• The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
Measuring
Item
instrument
V. SIZE / Signal
V. POSITION generator
(4:3)
Remote
control unit
Screen
size
(92%)
Test point Adjustment part
FOCUS VR
[In HVT]
Test point Adjustment part
AV-27FA44
[2.DEF (D)]
D05: V PHASE
D07: V SIZE
V. CENTER SW
(S1421)
[MAIN PWB]
AV-32FA44
AV-36FA44
[2.DEF (D)]
D05: V PHASE
D07: V SIZE
D09: V CENTER
Picture
size
(100%)
Description
(1) Receive the cross-hatch signal.
(2) While watching at the screen, adjust the FOCUS VR
to the vertical and horizontal lines will be thinnest
and sharpest center horizontal line.
(3) Make sure that the picture is in focus even when the
screen gets darkened.
Description
(1) Receive the cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select the < D05 > (V PHASE) of the 2.DEF(D).
(4) Check that the value of < D05 > is 0.
(5) Adjust the vertical screen size of the visible screen
top to 92% with the < D07 > (V SIZE) and V
CENTER SW.
NOTE :
• Bottom is to be located with 85%~95% range.
• When vertical linearity is not even, adjust vertical
linearity by < D13 > (V LIN) and < D11 > (VS CORR).
(1) Receive the cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select the < D05 > (V PHASE) of the 2.DEF(D).
(4) Check that the value of < D05 > is 0.
(5) Adjust the vertical screen size of the visible screen
top to 92% with the < D07 > (V SIZE) and < D09 > (V
CENTER).
NOTE :
• Bottom is to be located with 85%~95% range.
• When vertical linearity is not even, adjust vertical
linearity by < D13 > (V LIN) and < D11 > (VS CORR).
Adjustment item
AV-27FA44
ASA AZA
D05: V PHASE 0
D07: V SIZE 90 80
D09: V CENTER
32
Initial setting value
AV-32FA44
AV-36FA44
AYA AZA
0 0
80 65 80
15 35 15
(No.52114)1-29