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33.9MHz
Signal
generator
GND
12Vdc
Power
Supply
GND(C26(-))
b) For Secam-L' system
Test Poin t :
J5 (one lead of R533)
Adjus t
: VR102
1) Turn on DC power supplies.
2) Apply 5Vdc to the + lead of C25.
3) Adjust VCO adjust volume(VR102) so that the DMM reads 2.5Vdc+_0.1V.
* Scr een v oltage adjustment
1) Tune the TV set to receive digital pattern.
2) Press PSM button on the Remote Controller to get the STANDARD picture.
3) Turn the screen VR of FBT until the black level of picutre signal is 150Vdc at the digital pattern.
CPT BOARD
GND
Rk
OSCILLSCOPE
Fig. 3
MAIN BOARD
Ceramic
CAP.
10000pF
3
4
5
Ceramic
CAP.
10000pF
C25(+)
C25(-)
Fig. 2 : Connecting Diagram of Equipments for secam-L' system.
IC101
TDA4474
Z102
VR102
G3953
C123(+)
24
J77
J139
R169
R124
BLACK Level
Fig. 4
Multimeter &
oscilloscope
2.5Vdc
GND(C122(-))
GND
SW1
AM/FM SW
5V
SW2
L/L'SW
150Vdc
1.5V
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