background image
R
(without price)
TV-M420S(KX-504S)
TV-8700S(KX-514S)
FEB. 1996
EXT.ANT
AUDIO/
VIDEO
DC IN
12V
VHF
2
4
5
6
7
11
13
CH
UHF
14
CH
50
40
30
60
69
CH CALL
TUNING
OFF
VHF
UHF
VOLUME
BRIGHT
EAR
VHF
24
5
6
7
11
13
CH
UHF
14
CH
50
40
30
60
69
TV-8700S
TV-M420S
INDEX


background image
file:///C|/Documents%20and%20Settings/bob/My%20Documents/manualdirectory.htm
This file was downloaded and provided FREE OF CHARGE
from the ManualDirectory community.
You can find many free to download Service Manuals & Schematics at
http://www.manualdirectory.co.uk
file:///C|/Documents%20and%20Settings/bob/My%20Documents/manualdirectory.htm01/04/2007 01:34:00


background image
CONTENTS
SPECIFICATIONS ......................................................................................... 1
BLOCK DIAGRAM ........................................................................................ 2
PRINTED CIRCUIT BOARDS ....................................................................... 3
EXPLODED VIEW ......................................................................................... 7
ELECTRICAL PARTS LIST ........................................................................... 9
MECHANICAL PARTS LIST ....................................................................... 17
IC AND TRANSISTOR LEAD IDENTIFICATION ........................................ 19
SCHEMATIC DIAGRAMS ........................................................................... 21
WAVEFORMS .............................................................................................. 23


background image
-- 1 --
Areas whose signals this TV cannot receive.
TU
V
SPECIFICATIONS
Item
Specification
1. Reception channels
VHF: 1 ~ 12 ch
UHF: 13 ~ 69 ch
2. Power voltage
DC 12.0 V
3. Power consumption
TV-M420S: Approx. 6.7 W
TV-8700S: Approx. 6.1 W
4. Current consumption
TV-M420S: Approx. 558 mA
TV-8700S: Approx. 508 mA
5. Battery life (with alkaline batteries)
Approx. 8.0 hours (TV-8700S only)
Batteries
: 4 x LR20 (D) size batteries (TV-8700S only)
6. Power supply
Car adaptor : CA-K1200
AC adaptor : AD-K1200
Earphone jack
: 3.5 ø mini
7. Connection terminals
External power jack
: 12.0 V DC IN
External antenna jack
: 3.5 ø mini
Audio/Video jack
: 3.5 ø mini
Diversity jack
: 3.5 ø mini (TV-M420S only)
8. Screen size
4 inches
9. No. of picture element
153,360 (213 x 720) dots
10. Dimensions
TV-M420S : 104 mm (H) x 142 mm (W) x 41 mm (D)
TV-8700S
: 104 mm (H) x 142 mm (W) x 74 mm (D)
11. Weight
TV-M420S : 354 g excluding batteries
TV-8700S
: 445 g excluding batteries
12. Options
AC adaptor
: AD-K1200
Car adaptor
: CA-K1200
RF connector
: CF-13
Antenna matching device : AS-35S


background image
-- 2 --
BLOCK DIAGRAM
Antenna
1 TU
2 Q200
3 IC200
4 IC600
Speaker
Tuner
IF Amp.
Video
Sound
FM
AFT Circuit
AGC Circuit
} Det.
Audio
Amp.
LCD
Segment
Driver
Common
Driver
Chroma
Circuit
OSC
Display
Control
A/D Converter
Auto-tuning
Control
Tuning
Voltage
Generator
Power
Supply
VCC2 (4.3 V)
VCC7 (45 V)
VEE1 (-7.1 V)
VR800
Brightness
Control
5
IC300, IC500
6
IC700
8 IC800
Display
Voltage
Generator
7
IC400
VR640
Volume
Control
1 -- Tuner TU TEPM5-01
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 the tuner TU by 10 times (20 dB).
3 -- Video, Sound, FM Det., 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 NJM386 (TV-M420S), NJM2070 (TV-M8700S)
Sound amplification.
5 -- Chroma Circuit IC300 M51403FP, IC500 M51404AFP
Generates the tricolor of red, green and blue from the video signal.
6 -- OSC, A/D Converter, Display / Auto-tuning Control : IC700 MSM6625-01 GSK-640E
Converts the color signal into digital signal.
Also generates the clock pulse for the display, and controls the display.
7 -- Tuning Voltage Generator IC400 MSC1169MS-K
Generates the tuning voltage from the tuning pulse (TU) output of 6.
8 -- Display Voltage Generator IC800 BA10358F
Generates the display voltages V0 ~ V4 from VEE1 and VCC7 outputs of the power supply.