JVC AV-21RM4SE Service Manual page 23

Measuring
Item
instrument
HORIZONTAL Signal
PINCUSHION gener ator
adjustment
(50Hz) Remote
control unit
HORIZONTAL Signal
CORNER gener ator
CORRECTION
adjustment Remote
(50Hz) control unit
HORIZONTAL Signal
TRAPEZOID gener ator
adjustment
(50Hz) Remote
control unit
Screen
Vertical
Center
Test point Ad justment part
HPIN
HCCO
HT RP
A
B
No. 52056
Description
1. Receive a PAL B/G cross-hatch pattern signal of vertic al
frequency 50Hz.
2. Enter GEOMETRY MENU.
3. Select HPIN(Horizontal pincushion) with the FUNCTION
( / ) key.
4. Adjust HPIN with the FUNCTION ( / ) key until the bending
of the vertical line of the cross -hatch pattern are corrected.
5. Check and readjust HPIN item if the adjustment becomes
improper after some other geometric adjustments are done.
1. Receive a PAL B/G cross-hatch pattern signal of vertic al
frequency 50Hz.
2. Enter GEOMETRY MENU.
3. Select HCCO (Horizontal corner c orrection) with the
FUNCTION ( / ) key.
4. Adjust HCCO with the FUNCTION ( / ) key until the bending
of the vertical line of the cross -hatch pattern are corrected.
5. Check and readjust HCCO item if the adjustment becomes
improper after some other geometric adjustments are done.
1. Receive a PAL B/G cross-hatch pattern signal of vertic al
frequency 50Hz.
2. Enter GEOMETRY MENU.
3. Select HTRP (Horizontal trapezoid) with the FUNCTION
( / ) key.
4. Adjust HTRP with the FUNCTION ( / ) key until both lengths
of the upper side and lower side of the cross-hatc h pattern
become equal.(A=B)
5. Check and readjust HTRP item if the adjustment becomes
improper after some other geometric adjustments are done.
AV-25BT6ENS
AV-25BT6ENB
19