Sony HCD-VR90AV - SECTION 6 DIAGRAMS

1919
6-1. CIRCUIT BOARDS LOCATION
SECTION 6
DIAGRAMS
VIDEO SECTION
Frequency adjustment
1. Connect the frequency counter to check point TP508 (27MHz)
of the VIDEO board.
2. Adjust CT503 of the VIDEO board so that the frequency counter
read 27MHz ± 80Hz at STOP condition.
[ VIDEO BOARD ] – SIDE B –
Adjustment Location :
[ VIDEO BOARD ] – SIDE A –
frequency counter
VIDEO board
(27 MHz)
+
–
SL501
D502
SL502
CT503
TP508
SL503
TEST MODE
VIDEO
FREQUENCY
(27MHz)
(GND)
IC507
IC505
Adjustment Location :
[ BD BOARD ] — SIDE B —
TP
(VC)
TP
(RF)
TP
(TE)
TP
(IOP)
TP
(FE)
TP
(AGCCON)
TUNER UNIT
SURROUND AMP board
JACK board
VIDEO boar
d
TC-B board
TC-A board
FL board
PANEL VR board
FRONT INPUT board
TRANS board
MAIN boar
d
PA board
CD-L board
CD-R board
LED (PANEL) board
DOOR SW board
BD board
LED (CD) board
CD MOTOR board
TABLE SENSOR board
AUDIO board
LEAF SW board
SL501
IC502
IC506
(27MHz)
(GND)
SL502
SL503
TEST
MODE
TP508