— 3 —
BLOCK DIAGRAM
TV
1
— Color tuner: TU200 TEPU5-02
Selects a desired radio wave and changes it to the video IF signal.
2
— Video IF amp.: Q200 2SC4238
Amplifies the video IF signal output from tuner TU200 by 10 times (20 dB).
3
— Video det./Sound det./FM det./AFT/AGC: IC200 M51348FP
Eliminates the carrier wave in the video IF signal, and picks up the video signal and the sound IF signal.
Also, the sound signal is picked up from the sound IF signal by FM detection.
4
— Audio amp.: IC600 NJM2070M
Sound amplification.
5
— Chroma circuit: IC300 IR3P90Y
Generates the tricolor (red, green, and blue) from the video signal.
6
— Display control/Auto-tuning control: IC700 MSM6770GS
Controls the display.
7
— Tuning voltage generator: IC270 BA10358F
Generates the tuning voltage with the tuning pulse output from
6
.
Antenna
1 TU200
2 Q200
3 IC200
7
Tuning
Voltage
Generator
VR600
Volume
Control
4 IC600
Speaker
IC300
IC700
LCD
Chroma
Circuit
Display
Control
Auto-Tuning
Control
5
6
VCC1 (4.5 ± 0.05 V)
VCC2 (4.5 ± 0.05 V)
VCC7 (25.9 ~ 31.3 V)
VCC6 (10.0 ~ 12.0 V)
VEE1 (–8.0 ~ –7.0 V)
VEE2 (–18.4 ~ –16.0 V)
IC270
Power
Supply
Audio
Amp.
IF Amp.
Tuner
Video
Sound Det.
FM
AFT Circuit
AGC Circuit
Det
