JVC AV-21BS26 Service Manual page 24

Measuring
Item
instrument
V. SIZE Signal
generator
Remote
control unit
Screen
size
V. SLOPE Signal
generator
Remote
control unit
1-24 (No.YA443)
Test point Adjustment part
[4.DEF]
14. V. ZOOM
3. V-SIZE
Screen size
Vertical
amplitude
[4.DEF]
2. V-SLOPE
A
Blanking line
B
Description
PAL V. SIZE
(1) Receive a circle pattern signal of vertical frequency
50Hz (PAL).
(2) Set the COMPRESS(16 : 9) to ON.
(3) Select 4. DEF from the SERVICE MODE.
(4) Set the initial setting value of <14. V. ZOOM>.
(5) Select <3. V-SIZE>.
(6) Set the initial setting value of <3. V-SIZE>.
(7) Adjust <3. V-SIZE> to set the vertical amplitude of
the image to 240mm.
(8) Press the [OK] key to memorize the set values.
NTSC V. SIZE
(1) Receive a crosshatch signal of vertical frequency
60Hz (NTSC).
(2) Follow the same step 2 to 8 as in PAL V. SIZE.
PAL V. SLOPE
(1) Receive a circle pattern signal of vertical frequency
50Hz (PAL).
(2) Set the COMPRESS(16 : 9) to ON.
(3) Select 4. DEF from the SERVICE MODE.
(4) Select <2. V-SLOPE>.
(5) Set the initial setting value of <2. V-SLOPE>.
(6) Adjust <2. V-SLOPE> to make "A = B".
(7) Press the [OK] key to memorize the set values.
NTSC V. SLOPE
(1) Receive a circle pattern signal of vertical frequency
60Hz (NTSC).
(2) Follow the same step 2 to 7 as in PAL V-SLOPE.