22
VIDEO SECTION
Frequency adjustment
1.
Connect the frequency counter to check point 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
IC502
SL502
SL503
TEST
MODE
SL501 SL502
CT503
SL503
TEST MODE
VIDEO
FREQUENCY
(27MHz)
(GND)
IC507
IC505
Adjustment Location :
[ BD BOARD ] — SIDE B —
TP
(VC)
TP
(RF)
TP
(TEO)
TP
(IOP)
TP
(FEO)
TP
(AGND)
TP
(DGND)
TP
(AGCCON)
IC102
Summary of Contents for HCD-VX77
Page 39: ...HCD VX77 VX77J 39 39 7 14 SCHEMATIC DIAGRAM POWER AMP SECTION ...
Page 43: ...HCD VX77 VX77J 43 43 7 18 SCHEMATIC DIAGRAM LEAF SW SECTION ...
Page 45: ...HCD VX77 VX77J 45 45 7 20 SCHEMATIC DIAGRAM DRIVER SECTION See page 58 for IC Block Diagrams ...
Page 47: ...HCD VX77 VX77J 47 47 7 22 SCHEMATIC DIAGRAM TRANS SECTION ...