JVC TM-H150CG/E Service Manual page 27

4.10.2 B1 VOLTAGE
Measuring
Item
instrument
B1 VOLTAGE Signal
generator
DC voltmeter
4.10.3 FOCUS
Measuring
Item
instrument
FOCUS Signal
generator
Test points Adjustment part
TP-B1 B1 ADJ VR
(VR1901)
TP-E(GND) [MAIN PWB]
(E2)
SCREEN VR
[MAIN PWB] [in FBT]
Test points Adjustment part
FOCUS 1 VR
FOCUS 2 VR
[In FBT]
Description
(1) Receive a whole black signal.
(2) Connect a DC voltmeter to TP-B1 and TP-E( ).
(3) Adjust the B1 ADJ VR(VR1901) so that B1 voltage is
at 53V±0.2V.
(4) If B1 voltage is out of range, adjust it with B1 ADJ
VR(VR1901).
Description
(1) Input the crosshatch pattern signal.
(2) Adjust the FOCUS 1 VR (Vertical line) and FOCUS
2 VR (Horizontal line) for optimum focus where moi-
re is not apparent.
(3) Darken the picture and adjust the focus by turning
counter-clockwise from the position where focus is
poor.
(4) Alternately repeat the above steps to obtain the
optimum position.
(No.YA068)1-27