R
(without price)
TV-770C (PAL B / G, H)
TV-770D (PAL I)
TV-770G (PAL M)
TV-770N (PAL B / G, H)
(KX-503)
AUG. 1996
CH
2
4
5
6
7
11
13
CH
14
30
40
50
60
69
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file:///C|/Documents%20and%20Settings/bob/My%20Documents/manualdirectory.htm01/04/2007 01:34:00
CONTENTS
SPECIFICATIONS ......................................................................................... 1
BLOCK DIAGRAM ......................................................................................... 2
PRINTED CIRCUIT BOARDS ........................................................................ 3
EXPLODED VIEW .......................................................................................... 5
PARTS LIST ................................................................................................... 6
IC AND TRANSISTOR LEAD IDENTIFICATION .......................................... 9
SCHEMATIC DIAGRAMS ............................................................................ 11
WAVEFORMS .............................................................................................. 15
-- 1 --
Item
Specification
1. Power voltage
DC 6.0 V
2. Power consumption
Approx. 3.6 W
3. Current consumption
Approx. 600 mA
4. Battery life (with alkaline batteries)
Approx. 4.0 hours
Batteries
: 4
× LR6 (D) size batteries
5. Power supply
Car adaptor : CA-K65
AC adaptor : AD-K64, 65
Earphone jack
: 3.5 ø mini
6. Connection terminals
External power jack
: 6.0 V DC IN
External antenna jack
: 3.5 ø mini
7. Screen size
2.3 inches
8. No. of picture element
39,600 (110
× 360) dots
9. Dimensions
127 mm (H)
× 81 mm (W) × 35 mm (D)
10. Weight
200 g without batteries
AC adaptor
: AD-K64, 65
11. Options
Car adaptor
: CA-K65
Antenna matching device : AS-35S
SPECIFICATIONS
Model
Color System
TV System
Channel
TV-770C/N
PAL
B/G, H
CCIR
VHF: 2 ~ 12 ch
UHF: 21 ~ 69 ch
TV-770D
PAL
/I
UK
--
UHF: 21 ~ 68 ch
TV-770G
PAL
M/M
US
VHF: 2 ~ 13 ch
UHF: 14 ~ 69 ch
-- 2 --
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 ± 0.02V)
VCC7 (34.2 ~ 41.8V)
VEE1 (6.1 ~ 7.3V)
IC500
Power
Supply
Audio
Amp.
IF Amp.
Tuner
Video
Sound
Det.
FM
AFT Circuit
AGC Circuit
Det