JVC AV-20F475/S Service Manual page 21

4.8.4 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%)
Setting item
D05: V PHASE
D07: V SIZE
V. SIZE / Signal
V. POSITION generator
(16:9)
Remote
control unit
B
[B=B']
B'
Adjust
point
B
Test point Adjustment part
[2.DEF (D)]
D05: V PHASE
D07: V SIZE
D13:V LIN
D11:VS CORR
V. CENTER SW
(S401)
[MAIN PWB]
Picture
size
(100%)
Initial setting value
0
55
[2.DEF (D)]
D08: V. SIZE+-
D14: V. LIN+-
Setting value
67mm
Description
(1) Receive the cross-hatch signal.
(2) Select 2.DEF(D) from the SERVICE MODE.
(3) Select the < D05 > (V PHASE).
(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 within 85%~95% range.
• When vertical linearity is not even, adjust vertical
linearity by < D13 > (V LIN) and < D11 > (VS CORR).
• V. SIZE / V. POSITION (4:3) adjustment should be
finished.
(1) Receive the black and white signal (color off).
(2) Select 16:9 mode.
(3) Confirm that the width of V. BLANKING is equal to
adjustment value (B).
(4) If the adjustment is not correct, select 2.DEF(D) from
the SERVICE MODE.
(5) Then adjust the < D08 > (V. SIZE+-) and < D14 > (V.
LIN+-) to be same to adjustment value (B).
NOTE :
• When you change the VERTICAL adjustment value of
the regular mode (4:3), confirm the adjustment of 16:9
mode again.
Setting item
D08: V SIZE+-
D14: V LIN+-
Initial setting value
-26
0
(No.YA052)1-21