Page 1
TV-770B (KX-503B)
INDEX
(For NTSC)
JUN. 1996
(without price)
CH 2 4 5 6 7 11 13
CH 14 30 40 50 60 69
TV-770B
R
Page 2
CONTENTS
SPECIFICATIONS ......................................................................................... 1
BLOCK DIAGRAM ........................................................................................ 2
PRINTED CIRCUIT BOARDS ....................................................................... 3
EXPLODED VIEW ......................................................................................... 5
PARTS LIST .................................................................................................. 6
IC AND TRANSISTOR LEAD IDENTIFICATION ........................................ 10
SCHEMATIC DIAGRAMS ........................................................................... 13
WAVEFORMS.............................................................................................. 15
Page 3
SPECIFICATIONS
Item Specification
1. Reception channels VHF: 2 ~ 13 ch UHF: 14 ~ 69 ch
2. Power voltage DC 6.0 V
3. Power consumption Approx. 3.6 W
4. Current consumption Approx. 600 mA
5. Battery life (with alkaline batteries) Approx. 4.0 hours
Batteries : 4 × LR6 (D) size batteries
6. Power supply Car adaptor : CA-K65
AC adaptor : AD-K64, 65
Earphone jack : 3.5 ø mini
7. Connection terminals External power jack : 6.0 V DC IN
External antenna jack : 3.5 ø mini
8. Screen size 2.3 inches
9. No. of picture element 39,600 (110 × 360) dots
10. Dimensions 127 mm (H) × 81 mm (W) × 35 mm (D)
11. Weight 200 g without batteries
AC adaptor : AD-K64, 65
12. Options Car adaptor : CA-K65
Antenna matching device : AS-35S
— 1 —
Page 4
Antenna
BLOCK DIAGRAM
Power
Supply
1 TU200 2 Q200
IF Amp.Tuner
IC500
7
Tuning
Voltage
Generator
VCC2 (3.95 ± 0.02 V)
VCC7 (34.2 ~ 41.8 V)
VEE1 (–6.1 ~ –7.3 V)
VR800
Brightness
Control
3 IC200
Video
Sound Det.
FM
AFT Circuit
AGC Circuit
5
6
Osc.
Display
Control
A-D Converter
Auto-Tuning
Control
Det
IC300
Chroma
Circuit
IC700
VR600
Volume
Control
8 Q800~Q803, Q805, Q806
Display
Voltage
Generator
4 IC600 Speaker
Audio
Amp.
Common
Driver
LCD
Segment
Driver
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 M52042FP
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.
— 2 —
Page 5
TOP VIEWS
Linear
PRINTED CIRCUIT BOARDS
SW100
C105
FU100
JK100
VR100
R840
Q110
R113
R704
D155
D180
Q101
C115
TU200
C236
R110
R108
C140
R115
T100
C112
JK200
C113
C603
C202
C208
C207
F200
C205
CN710
C100
C110
D150
L101
R738
C606
C249
R224
D707
JK600
VR301
C210
R226
F211
F210
R252
R253
R222
R209
L102
R251
R223
VR700
L103
R335
R336
C245
R212
C750
R305
F203
VR200
R236
C259
R257
R808
R809
IC700
C309
C330
R306
C281
R254
C780
R810
C270
L202
C263 C262
C800
C351
C346
C742
T200
T201
C808
C700
H300
R322
C741
C806
D805
D803
C740
R261
R830
VR300
F221
R255
R256
F220
R816
R820
R745
C782
VR600
VR800
C305
R310
C340
R813
CN700
Back Light
L950
CN950
C925
— 3 —
T950
C927
Page 6
BOTTOM VIEWS
Linear
C335
R260 R258
R331 R330
R307
R707C730
R706 C282
Q230
R259
C837
R815
R814
C840
C836
Q801
IC300
C345
SW200
VCC2-3
C350
C348
COL
C347
Q300
C272
C264
R239
HD
Q802 Q803
Q800
R247
R246
C261R241
R116
R326
R325
HP210
ATT
R225
C-SYNC
AFT
BR
OR
AUDIO
VIDEO
IC200
BM
R645
CP244
C230
R210
R208
C243
C246
CP330
R211
VCC1-1
BT
BV
C233
CP200
BU
R150
C242
C240
RF
BS
IF
C237 R203
HP200
C238
Q200
H/L
C265 C642
R610
R611C250
R641
C635
C545 C234
R545 C535
R541
C231
C200
R201
R202 R207
R205
R204
HP701
TU
C630
R503 C530
C232
C550
L200
IC500
D500
R550
C239
IC600
CP590
C641
R500 R501 R502
R607
R606
Back Light
G
R615
R825
R
C770
C841
D800
L710
VCC2-8
Q806
Q805
R727
R726
R725
R827
R833
D705
C760
C830
R800
R803
R733
C756
R730
C751
C755
L705
C758
VEEI
PD
C761
D703
R700
KDB
R709
HP700
R718
VCC2
R710
R711
R719
B
C150
GND
C130
C765
D152
C153
CP990
VCC7
Q111
R106
R107
C137
C145
VCC2-0
C155
C152
C160
HP906HP905
R105
D110
TM100
D100
C182
C185
Q951
Q950
R950
R746
— 4 —
CP900
SW700
C783
CP902
SW710
Page 7
EXPLODED VIEW
1
14
2
5
4
10
3
6
17
16
19
15
20
7
8
7
5
8
9
11
LA900
18
12
13
— 5 —
21
25
24
23
22
Page 8
PARTS LIST
LINEAR PCB
Item Code No. Parts Name Specification Q R
Diodes
D100 2390 1176 Chip diode MA152WK-(TX) 1 C
D110 2315 0166 Chip zener diode MA3047-L(TX) 1 C
D150 2390 1176 Chip diode MA152WK-(TX) 1 C
D152 2390 1176 Chip diode MA152WK-(TX) 1 C
D155 2390 1302 Chip diode MA153A-(TX) 1 C
D180 2390 1190 Chip diode ERA15-01Y 1 C
D500 2360 1344 Chip zener diode MA3330-M(TX) 1 C
D703 2390 0469 Chip diode MA157A-(TX) 1 C
D705 2390 1358 Variable diode MA329-(TX) 1 C
D707 2360 1113 Chip zener diode MA3082-M(TX) 1 C
D800 2360 2919 Chip zener diode MA3056-L(TX) 1 C
D803 2390 0469 Chip diode MA157A-(TX) 1 C
D805 2390 1253 Chip diode MA152WA-(TX) 1 C
Fuse
FU100 3632 0469 Fuse PI-251001(F10) 1 A
ICs
IC200 2114 1827 Linear IC M51348FP-T1 1 C
IC300 2114 3332 Linear IC M52042FP-T1 1 C
IC500 2114 0182 Linear IC MSC1169MS-K-620 1 C
IC600 2114 2464 Linear IC NJM2070M-T1 1 C
IC700 2011 3514 LSI MSM6625-02GSK-640F 1 C
Jacks
JK100 3501 8281 Jack HEC0811-010010 1 B
JK200 3501 5439 Jack HSJ1456-01-210 1 C
JK600 3501 5439 Jack HSJ1456-01-210 1 C
Transistors
Q101 2230 7011 Chip transistor 2SD601A-R(TX) 1 B
Q110 2230 7011 Chip transistor 2SD601A-R(TX) 1 B
Q111 2253 0308 Chip transistor 2SD1119-R(TX) 1 B
Q200 2252 0707 Chip transistor 2SC4238-(TX) 1 C
Q300 2210 8026 Chip transistor 2SB709A-R(TX) 1 C
Q800 2230 7011 Chip transistor 2SD601A-R(TX) 1 C
Q801 2210 8026 Chip transistor 2SB709A-R(TX) 1 C
Q802 2230 7011 Chip transistor 2SD601A-R(TX) 1 C
Q803 2230 7011 Chip transistor 2SD601A-R(TX) 1 C
Q805 2253 0476 Chip transistor 2SD1149-S(TX) 1 C
Q806 2230 7011 Chip transistor 2SD601A-R(TX) 1 C
Switch
SW100 3412 0938 Slide switch ESD-11V231 1 C
Converter
T100 3065 0672 DC-DC converter LC12U-40 1 B
Tuner
TU200 1013 5511 Tuner TEPU5-02 1 C
Variable resistors
VR600 2765 1708 Volume XV081PV1NB10K3017 1 C
VR800 2765 2037 Volume XV081PV1NB20K3017 1 C
Notes: Q – Quantity per unit
R – Rank
— 6 —
Page 9
BL PCB
Item Code No. Parts Name Specification Q R
Lamp
LA900 3851 1918 Fluorescent lamp 3064BB-CA39 1 A
Transistors
Q950 2253 0308 Chip transistor 2SD1119-R(TX) 1 B
Q951 2253 0308 Chip transistor 2SD1119-R(TX) 1 B
Switches
SW700 3412 1029 Switch SKHHAL 1 C
SW701 3412 1029 Switch SKHHAL 1 C
Transformer
T950 3012 1470 Inverter trans NT-07 1 B
Notes: Q – Quantity per unit
R – Rank
— 7 —
Page 10
MAIN COMPONENT
Item Code No. Parts Name Specification Q R
1 6611 0980 Display plate BXM-K503 K440797-1 1 C
2 6611 1010 Adhesive tape A-K503 K440801-1 1 X
3 6611 0870 Upper case BXM-K503 K140252-1 1 X
4 6020 7658 Battery spring B1 G513 P408A-1 1 X
5 6020 7666 Battery spring B2 G513 P409A-1 2 X
6 3831 0854 Speaker 28-8F-03 1 C
7 6611 0990 Cushion A-K503 K440802-1 2 X
8 6611 1000 Cushion B-K503 K440802-2 2 X
9 6611 2290 Tuning button A-K503 K240481-1 1 X
10 6611 0890 Battery cover A-K503 K240450-1 1 X
11 2725 1218 LCD PSG123CO-TO 1 C
12 6611 0930 Light diffuser sheet A-K503 K440800-1 1 X
13 6611 0900 Reflector case K503 K140261-1 1 X
14 6611 2261 BL unit K340625*1 1 B
15 6611 0910 Switch knob A-K503 K340575-1 1 X
16 6611 0960 Battery spring A-K503 K440798-1 1 X
17 6611 0970 Battery spring B-K503 K440799-1 1 X
18 6611 2256 Linear PCB ass'y K240495*1 1 B
19 3851 1470 Rod antenna VR70100GA 1 B
20 6611 0880 Lower case BXM-K503 K140253-1 1 X
21 6611 2300 Stand A-K503 K310518-7 1 C
22 6611 2310 Rating plate BXM-K503 K340609-1 1 X
23 6609 1290 Screw A-K610 K412031-1 1 C
24 5860 0532 Screw BT3 1.7X9 Bk 1 C
25 6609 9630 Screw A-K720 K410188-6 1 C
Notes: Q – Quantity per unit
R – Rank
— 8 —
Page 11
The following electrical parts will be not supplied from CASIO. (For TV-770B)
C100 10RE2-220 C756 GR40Y5V103Z50PT R307 ERJ-6GEYJ152V
C105 6.3RC2-47MS-T36 C758 GR40Y5V104Z25PT R310 ERJ-6GEYJ474V
C110 10RC2-33MS-T36 C760 GR40W5R222K50PT R322 ERJ-6GEYJ473V
C112 6.3RC2-100MS-T36 C761 GR40Y5V104Z25PT R330 ERJ-6GEYJ302V
C113 6.3RC2S-100-T36 C770 GR40Y5V224Z16PT R331 ERJ-6GEYJ511V
C115 50RC2-10MS-T36 C782 GR40Y5V224Z16PT R335 ERJ-6GEYJ223V
C137 GR40W5R682K50PT C806 50RC2-3R3-T36 R336 ERJ-6GEYJ683V
C140 GR40CH471J50PT C808 50RC2-2R2-T36 R500 ERJ-6GEYJ104V
C145 GR40W5R332K50PT C830 GR40Y5V104Z25PT R501 ERJ-6GEYJ563V
C182 GR40Y5V104Z25PT C836 GR40Y5V104Z25PT R502 ERJ-6GEYJ274V
C185 GR40Y5V104Z25PT C837 GR40CH221J50PT R541 ERJ-6GEYJ223V
C200 UMK316B104K-T C841 UMK316F474Z-T R545 ERJ-6GEYJ684V
C202 6.3RC2-47MS-T36 CN700 52806-2010 R550 ERJ-6GEYJ152V
C205 50RC2-2R2 CN710 9210B-1-04Z009-T R606 ERJ-8GEYK4R7V
C207 6.3RC2-47MS F200 SAF45MB200Z R607 ERJ-8GEYK4R7V
C208 6.3RC2-47MS F203 TPS4.5MB R610 ERJ-6GEYJ153V
C210 16RC2-10-T36 F210 SFSL4.5MDB12 R611 ERJ-6GEYJ132V
C233 GR40Y5V103Z50PT F220 CDSL4.5MC30C12 R615 ERJ-6GEYJ222V
C234 GR40Y5V104Z25PT H300 HC-49U R641 ERJ-6GEYJ104V
C236 GR40Y5V103Z50PT L101 LEM4532-470K-TP R645 ERJ-6GEYJ470V
C237 GR40Y5V103Z50PT L102 EL0405RA-101K-2 R700 ERJ-6GEYJ105V
C238 GR40Y5V103Z50PT L200 LK2125-R82K-TP R704 ERJ-6GEYJ273V
C240 GR40Y5V103Z50PT L202 LAL02VA150J R706 ERJ-6GEY0R00V
C243 GR40Y5V103Z50PT L705 LEM3225-270K-TP R707 ERJ-6GEYJ0R00V
C245 GR40W5R103K50PT L710 BK2125HS601-T R710 ERJ-6GEYJ560V
C246 GR40Y5V103Z50PT R105 ERJ-6GEYJ222V R711 ERJ-6GEYJ270V
C249 GR40Y5V474Z16PT R106 ERJ-6GEYJ103V R719 ERJ-6GEY0R00V
C259 GR40W5R223K25PT R107 ERJ-6GEYJ333V R725 ERJ-6GEYF131V
C261 GR40PH560J50PT R108 ERJ-6GEYJ274V R726 ERJ-6GEYF751V
C262 GR40Y5V103Z50PT R110 ERJ-6GEYJ271V R727 ERJ-6GEYF102V
C263 GR40PH560J50PT R113 ERJ-6GEYJ222V R730 ERJ-6GEYJ562V
C264 GR40CH1R5C50PT R115 ERJ-6GEYJ220V R733 ERJ-6GEYJ104V
C265 GR40Y5V103Z50PT R116 ERJ-6GEYK4R7V R738 ERJ-6GEYJ303V
C281 GR40CH270J50PT R201 ERJ-6GEYJ820V R745 ERJ-6GEYJ272V
C282 ERJ-6GEY0R00V R202 ERJ-6GEYJ472V R800 ERJ-6GEYJ473V
C305 16RC2-10-T36 R203 ERJ-6GEYJ222V R803 ERJ-6GEYJ242V
C309 6.3RC2-47MS-T36 R204 ERJ-6GEYJ561V R808 ERJ-6GEYJ153V
C330 EMK316B474K-T R205 ERJ-6GEYJ220V R809 ERJ-6GEYJ153V
C335 GR40CH331J50PT R207 ERJ-6GEYJ151V R810 ERJ-6GEYJ153V
C340 GR40W5R103K25PT R208 ERJ-6GEYJ272V R813 ERJ-6GEYJ223V
C345 GR40W5R471K50PT R209 ERJ-6GEYJ103V R814 ERJ-6GEYJ223V
C346 GR40W5R333K25PT R210 ERJ-6GEYJ472V R815 ERJ-6GEYJ562V
C348 GR40Y5V104Z25PT R211 ERJ-6GEYJ104V R816 ERJ-6GEYJ223V
C350 GR40CH181J50PT R212 ERJ-6GEYJ222V R820 ERJ-6GEYK475V
C351 GR40CH220J50PT R222 ERJ-6GEYJ470V R825 ERJ-6GEYJ103V
C545 GR40W5R333K25PT R223 ERJ-6GEYJ124V R827 ERJ-6GEYJ333V
C550 GR40Y5V683Z50PT R224 ERJ-6GEYK475V R830 ERJ-6GEYJ223V
C603 6.3RC2-100MS-T36 R225 ERJ-6GEY0R00V R833 ERJ-6GEYJ223V
C606 6.3RC2-100MS-T36 R236 ERJ-6GEYJ274V R840 ERJ-6GEYJ103V
C630 GR40Y5V103Z50PT R239 ERJ-6GEYJ392V T200 S5LD3-01
C635 EMK212F105Z-T R246 ERJ-6GEYJ181V T201 S5LD3-01
C642 GR40Y5V104Z25PT R247 ERJ-6GEYJ102V TM100 157-102-53031-TP
C700 6.3RC2-47MS-T36 R251 ERJ-6GEY0R00V VR100 EVN5ESX50B23
C740 GR40Y5V104Z25PT R256 ERJ-6GEYJ561V VR200 EVN5ESX50B54
C741 GR40Y5V104Z25PT R257 ERJ-6GEYJ182V VR300 EVN5ESX50B14
C742 GR40Y5V104Z25PT R258 ERJ-6GEY0R00V VR301 EVN5ESX50B54
C750 GR40CH470J50PT R261 ERJ-6GEY0R00V VR700 EVN5ESX50B15
C751 GR40CH470J50PT R305 ERJ-6GEYJ102V
C755 GR40UJ270J50PT R306 ERJ-6GEYJ473V
— 9 —
Page 12
IC/LSI
IC AND TRANSISTOR LEAD IDENTIFICATION
IC200 IC300
M51348FP-T1 M52042FP
IF AGC OUT 1 24 IF AGC ADJ
IF AGC IN 2 23 SyOUT
RF AGC 3 22 SyIN
AGCDL 4 21 AFTC
VCCv 5 20 LLD
IFIN 6 19 LLD
IFIN 7 18 VIDEO
GNDv 8 17 AFT
VCCs 9 16 SIFOUT
SIFIN 10 15 FMD
FB 11 14 ATT
GNDs 12 13 AUDIO
IC500
MSC1169MS-K-620
VIDEO 1 24 VCC
SY IN 2 23 VCXO OUT
ACCF 3 22 NC
SY OUT 4 21 VCXO IN
HDIN 5 20 COLOR
Y CLAMP 6 19 TINT
Y LPF 7 18 KILLER F
Y OUT 8 17 APCF
CONT 9 16 APCREF
R 10 15 KILLER OUT
G 11 14 PIX
B 12 13 GND
IC600
NJM2070M-T1
Vref 1 16 VCC
U1 2 15 BS
U2 3 14 BT
VL1 4 13 IN
VL2 5 12 OUT
VH1 6 11 TU
VH2 7 10 H/L
GND 8 9 U/V
NC 1 8 NC
+IN 2 7 VCC
–IN 3 6 OUT
GND 4 5 GND
— 10 —
Page 13
IC700
MSM6625-02GSK-640F
KDB
KCB
AVB
UHF
VLBTUMTB
VDD1
HDB
C-SPDOSC2
OSC1
CK2
AFT
M1
M2
M3
M4
M11
M5
M6
TE6
TE5
TE4
TE3
TE2
TE1
VSS2
28272625242322212019181716
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43444546474849505152535455
B
R
AD2
AD1
G
RLL
RHH
VDD2
M7M8M9
M10
PS1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
56
VSS1
CK1
ECB
STB
SCB
CNB
CFB
CDB
SNB
D6
D5
D4
D3
D2
D1
TRANSISTORS
BEC
2SD1119
C
C
BE
2SB709A
2SC4238
2SD601A
2SD1149-S
— 11 —
Page 14
LINEAR
SCHEMATIC DIAGRAMS
Antenna
External Antenna
Jack
Tuner
IF Pad
TP7
TP4
TP3
3
2
1
4
8
6
IF Detection Circuit
Chroma Circuit
7
TP5
5
Display Generator Voltage
Circuit
TP2
DC In
Power Switch
TP1
34.2 ~ 41.8 V
3.95 V
-6.1 ~ -7.3 V
TP6
9
10
Tuning Voltage Generator Circuit
Earphone
Jack
Speaker
Power Supply Circuit
Audio Amplifier Circuit
Display Controller Circuit
— 13 —
Page 15
BACK LIGHT
Notes:
1. All resistance values are indicated in "ohms" (k=103 ohms, M=106 ohms).
2. All capacitance values are indicated in "µF" (p=10-6 µF).
3. All inductance values are indicated in "µH."
— 14 —
Page 16
WAVEFORMS
0.1 V
2.0 V
63.5 µs 63.5 µs 63.5 µs
1 Q200 collector 2 IC200 pin 19 3 IC200 pin 18
1.8 V
0.8 V
0.24 µs 63.5 µs 63.5 µs
4 IC300 pin 23 5 IC300 pin 12 6 IC300 pin 5
0.8 V
3.0 V
3.0 V
63.5 µs 63.5 µs
7 IC300 pin 4 8 IC300 pin 1
3.0 V
420 ns
0 IC700 pin 14
0.8 V
9 IC700 pin16
3.0 V
130 ns
— 15 —
Page 17
8-11-10, Nishi-Shinjuku
Shinjuku-ku, Tokyo 160, Japan
Telephone: 03-3347-4926
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