Casio TV-770N User Manual

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1 — Color tuner: TU200 TEPU5-02/TEPE5-01/TEPB5-05
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 M52045FP
Generates the tricolor (red, green, and blue) from the video signal.
6 — Osc./A-D converter/display control/auto-tuning control: IC700 MSM6625-02 GSK-640F
Converts the color signal into a digital signal.
Also, generates the clock pulse for the display and controls the display.
7 — Tuning voltage generator: IC500 MSC1169MS-K
Generates the tuning voltage with the tuning pulse output from 6.
8 — Display voltage generator: Q800~Q803, Q805, Q806, 2SD601A-R x 4, 2SB709A-R, 2SD1149-S
Generates the display voltages V0 ~ V4 with VEE1 and VCC7 outputs from the power supply.
BLOCK DIAGRAM
Antenna
1 TU200 2 Q200
3 IC200
7
Tuning
Voltage
Generator
VR600
Volume
Control
4 IC600 Speaker
IC300
IC700
Common
Driver
LCD
Segment
Driver
Chroma
Circuit
Osc.
Display
Control
A-D Converter
Auto-Tuning
Control
5
6
8
Q800~Q803, Q805, Q806
VR800
Display
Voltage
Generator
Brightness
Control
VCC2 (3.95 ± 0.02V)
VCC7 (34.2 ~ 41.8V)
VEE1 (–6.1 ~ –7.3V)
IC500
Power
Supply
Audio
Amp.
IF Amp.Tuner
Video
Sound Det. 
FM
AFT Circuit
AGC Circuit
Det

Casio TV-770N Specifications

General

Brand	Casio
Model	TV-770N
Category	Portable TV
Language	English