R
(without price)
TV-M420B (KX-504B)
TV-8700B (KX-514B)
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-8700B
TV-M420B
INDEX
CONTENTS
SPECIFICATIONS ......................................................................................... 1
BLOCK DIAGRAM ........................................................................................ 2
PRINTED CIRCUIT BOARDS ....................................................................... 3
EXPLODED VIEW ......................................................................................... 7
ELECTRICAL PARTS LIST ........................................................................... 9
MECHANICAL PARTS LIST ....................................................................... 15
IC AND TRANSISTOR LEAD IDENTIFICATION ........................................ 17
SCHEMATIC DIAGRAMS ........................................................................... 19
WAVEFORMS .............................................................................................. 21
-- 1 --
Item
Specification
1. Reception channels
VHF: 2 ~ 13 ch
UHF: 14 ~ 69 ch
2. Power voltage
DC 12.0 V
3. Power consumption
TV-M420B: Approx. 6.7 W
TV-8700B: Approx. 5.7 W
4. Current consumption
TV-M420B: Approx. 558 mA
TV-8700B: Approx. 475 mA
5. Battery life (with alkaline batteries)
Approx. 9.0 hours (TV-8700B only)
Batteries
: 4
× LR20 (D) size batteries (TV-8700B only)
6. Power supply
Car adaptor : CA-K1200
AC adaptor : AD-K1200
Earphone jack
: 3.5 ø mini
External power jack
: 12.0 V DC IN
7. Connection terminals
External antenna jack
: 3.5 ø mini
Audio/Video jack
: 3.5 ø mini
Diversity jack
: 3.5 ø mini (TV-M420B only)
8. Screen size
4 inches
9. No. of picture element
153,360 (213
× 720) dots
TV-M420B : 104 mm (H)
× 142 mm (W) × 41 mm (D)
10. Dimensions
TV-8700B
: 104 mm (H)
× 142 mm (W) × 74 mm (D)
TV-M420B : 354 g excluding batteries
11. Weight
TV-8700B
: 445 g excluding batteries
AC adaptor
: AD-K1200
Car adaptor
: CA-K1200
12. Options
RF connector
: CF-13
Antenna matching device : AS-35S
SPECIFICATIONS
-- 2 --
Antenna
1 TU
2 IC200
3 IC600
Speaker
Tuner
IF Amp.
Video
Sound
FM
AFT Circuit
AGC Circuit
Chroma Circuit
} Det.
Audio
Amp.
LCD
Segment
Driver
Common
Driver
OSC
Display
Control
A/D Converter
Auto-tuning
Control
Tuning
Voltage
Generator
Power
Supply
VCC2 (3.95 V)
VCC7 (45 V)
VEE1 (-8 V)
VR800
Brightness
Control
4
IC700
6 IC800
Display
Voltage
Generator
5
IC500
VR640
Volume
Control
BLOCK DIAGRAM
1 -- Tuner TU TEPU5-02
Selects a desired radio wave, and changes it to the video IF signal.
2 -- Video, Sound, FM Det., AGC, Chroma circuit IC200 CST-2
Eliminates the carrier wave in the video IF signal, and picks up the video signal and the sound IF signal.
The sound signal is picked up from the sound IF signal by FM detection.
Generates the tricolor of red, green and blue from the video signal.
3 -- Audio Amp. IC600 NJM386 (TV-M420B), NJM2070 (TV-M8700B)
Sound amplification.
4 -- 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.
5 -- Tuning Voltage Generator IC500 MSC1169MS-K
Generates the tuning voltage from the tuning pulse (TU) output of 4.
6 -- Display Voltage Generator IC800 BA10358F
Generates the display voltages V0 ~ V4 from VEE1 and VCC7 outputs of the power supply.
-- 3 --
Top View
PRINTED CIRCUIT BOARDS
TV-420B
CP731
CP724
CP252
CP734
CP700
CP726
C761
C760
R730
D700
D705
L700
CP111
CP104
R702
CP707
CP671
C630
C641
R641
R642
C642
C640
C192
IC600
CP640
R600
VR100
T950
CP603
CP600
CP100
CP101
C603
+
CN900
JK600
CP990
CP804
C155
C153
C152
R141
R140
C160
D155
D150
Q111
C108
C118
C112
C113
C115
CP800
+
+
+
+
+
C240
CP721
CP251
CP733
CP806
CP722
CP723
CP725
CP807
CP185
R200
R704
R726 R727 R725
C740
C741
C742
CP729
CP720
CP703
CP223
CP701
CP224
CP225
CP226
R201
IC800
C239
IC700
R706
VR700
C756
R733
C751
C755
C758
R734
R738
D804
D805
Q806
R827
C845
R825
R833
R834
R824
R823
Q805
D707
L705
C832
R835
R705
C830
C806
C808
C700
CP110
CP802
CP227
C810
+
+
+
+
VR200
D703
C776
R703
R718
R719
C236
C237
C250
CP211
CP221
CP106
HP705
HP200
C233
C780
R701
C545
R545
R550
C541
C200
C540
D550
C201
CP530
CP704
SW701
SW700
R770
VR800
VR640
R707
C781
IC500
SW702
CP751
CP204
C299
C550
CP206
CP207
CP208
CP209
JK200
JK250
JK100
SW100
CP820
C185
R607
R602
R606
C682
D600
R601
R123
C140
R132
C142
R124
R131
R125
R126
R121
C141
R102
D105
Q115
C138
C137
R108
R104
R103
C170
R150
C135
C132
R541
C231
C232
C235
C234
C542
R260
HP706
C680
R677
R676
R678
Q600
R105
R107
C136
C130
R114
R115
R110
R109
D100
VR110
C238
,,,
,,,
C205
F203
C204
+
C500
+
+
C225
+
C216
CP260
CP246
+
C227
JK205
L100
+
C900
C930
D103
HP120
Q140
D170
C777
CP670
CP673
CP750
CP541
CP210
CP542
CP222
CP702
CP244
CP801
CP728
CP727
CP270
CP590
CP705
CP190
CP108
CP109
IC100