JVC AV-20F475/S Service Manual page 22

Measuring
Item
instrument
H. SIZE / Signal
H. POSITION / generator
SIDE PIN
(4:3) Remote
control unit
H. POSITION / Signal
H. SIZE / generator
SIDE PIN
(16:9) Remote
control unit
1-22 (No.YA052)
Test point Adjustment part
[2.DEF (D)]
D03: H POSI
D15: H SIZE
D23: EW PARA
D19: EWCR TOP
D21: EWCR BTM
Screen size (90%)
Picture size (100%)
[2.DEF (D)]
D16: H SIZE+-
D04: H POSI+-
D24: EW PAR+-
D20: EWCR T+-
D22: EWCR B+-
Screen size (90%)
Picture size (100%)
Description
• V. SIZE / V. POSITION adjustment should be finished.
(1) Receive a cross-hatch signal.
(2) Select 2.DEF(D) from the SERVICE MODE.
(3) Select the < D03 > (H POSI).
(4) Adjust by H. POSITION to be same size at both side.
(5) Adjust the horizontal size of the visible screen to
90% with the < D15 > (H. SIZE).
(6) Adjust the vertical line at both side to become linear
line by < D23 > (EW PARA).
(7) Confirm the linearity of vertical line and horizontal
size.
(8) If it is necessary, readjust 1.~7.
NOTE :
• If it is not straight at the vertical upper and bottom
corner line adjust the upper and bottom corner pin by
< D19 > (EWCR TOP) and < D21 > (EWCR BTM).
• V. SIZE / V. POSITION adjustment should be finished.
• H. SIZE / H. POSITION / SIDE PIN adjustment should
be finished. (Regular size(4:3)).
(1) Receive the cross-hatch signal.
(2) Select 16:9 mode.
(3) Confirm both sides of cross-hatch to be the
adjustment value 90%.
(4) If it not correct, select 2.DEF(D) from the SERVICE
MODE.
(5) Adjust to be value 90% at the < D16 > (H SIZE+-) and
< D04 > (H POSI+-).
(6) Confirm the second vertical line from left to right to
be straight.
(7) If it is not straight, adjust to be straight by < D24 >
(EW PAR+-), < D20 > (EWCR T+-) and < D22 >
(EWCR B+-).
NOTE :
• Review the adjustment of 16:9 mode again when you
change the SIDE PIN adjustment value of regular
(4:3) mode.