— 9 —
— 10 —
VIDEO SECTION
Frequency adjustment (NTSC)
1.
Connect the frequenc
y counter to c
hec k point of the VIDEO
board.
Adjustment Location :
[ BD BOARD ] — SIDE A —
2.
Color system switch (S300) select to NTSC and turn the
POWER switch ON.
3.
Adjust CT503 of the
VIDEO boar d so that the frequenc
y
counter read 27.0MHz
±
80Hz at ST OP condition.
Frequency adjustment (PAL)
1.
Connect the frequenc
y counter to c
hec k point of the VIDEO
board.
2.
Color system s
witc h (S300) select to P
AL and turn the PO
WER
switch ON.
3.
Adjust CT503 of the
VIDEO boar d so that the frequenc
y
counter read 27.0MHz
±
80Hz at ST OP condition.
VIDEO board
27.0 MHz
frequency counter
GND
VIDEO board
27.0 MHz
frequency counter
GND
[ VIDEO BOARD ] — SIDE A —
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
CN board
BD board
VOL board
MAIN board
VIDEO board
DISPLAY board
LOADING board
MIC board
IC103
20
11
1
10
(RF)
(VC)
(FE)
(FEI)
IC101
IC513
IC512
X505
CT503
IC504
SL503
SL502
SL501
GND
27MHz
CN504