Casio TV1800C, TV-1800D, TV-1800I, TV-1800N Service manual

R

(without price)

TV-1800C(PAL B / G,H)
TV-1800D(PAL I)
TV-1800I (PAL B / G)
TV-1800N(PAL B / G,H)

(KX-523)

DEC. 1996

<

TUNING

>

CONTENTS

Page

SPECIFICATIONS.....................................................................................1

BLOCK DIAGRAM.................................................................................... 2

CIRCUIT OPERATIONS ...........................................................................3

PRINTED CIRCUIT BOARDS...................................................................4

PARTS LIST.............................................................................................. 6

EXPLODED VIEW.....................................................................................9

SCHEMATIC DIAGRAMS.......................................................................11

WAVEFORMS ......................................................................................... 14

SPECIFICATIONS

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. 2.5 hours

Batteries : 4 × LR6 (D) size batteries

5. Power supply Car adaptor : CA-K65
AC adaptor : AD-K65

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 2.5 inches

8. No. of picture element 115,020 (540 × 213) dots

9. Dimensions 135 mm (H) × 91 mm (W) × 38 mm (D)

10. Weight 240 g without batteries

AC adaptor : AD-K65

11. Options Car adaptor : CA-K65
Antenna matching device : AS-35S

Model Color System TV System Channel

TV-1800C/N PAL B/G, H CCIR VHF: 2 ~ 12 ch UHF: 21 ~ 69 ch

TV-1800D PAL –/I UK — UHF: 21 ~ 68 ch

TV-1800I PAL B/G ITALY VHF: A ~ H2 ch UHF: 21 ~ 69 ch

— 1 —

Antenna

BLOCK DIAGRAM

Power
Supply

1 TU200 2 Q200

IF Amp.Tuner

7

IC500

Tuning
Voltage
Generator

VCC2 (3.95V)
VCC7 (41.6~51.6V)
VEE1 (-6.5~-8.0V)

VR800

Brightness
Control

3 IC200

Video
Sound Det. 
FM
AFT Circuit
AGC Circuit

5

6

Osc.
Display
Control
A-D Converter
Auto-Tuning
Control

8 Q800~Q806

Det

IC300

Chroma
Circuit

IC700

Display
Voltage
Generator

VR600

Volume
Control

4 IC600 Speaker

Audio
Amp.

Common
Driver

LCD

Segment
Driver

1 — Color Tuner: TU200 TEPE5-01(TV-1800C/I/N) TU200 TEPB5-05(TV-1800D)

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 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 MSM662501 GSK-640E

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 (TU) output from 6.

8 — Display Voltage Generator: IC800 BA10358F, Q800 ~ Q806 Q810 Q811 2SD1149S,

2SD601A-R×3, 2SB709A-R
Generates the display voltages V0 ~ V4 with VEE1 and VCC7 outputs from the power supply.

— 2 —

CIRCUIT OPERATIONS

AD2
AD1

RLL

VDD2

RHH

M7
M8
M9

M10

PSi

VSS1

IC700

B
G
R

VSS2 TE1

A/D

Mode

Control

Data Output

TE2

TE4

TE5

TE6

M6 M5 M4 M3 M2 M1 AFT

Frequency

Divider

Channel
bar
Control

Vertical

positioning

Control

TE3

Test Control Mode Control

Test

Circuit

Display
Control

Sweep

Control

Tuning Control

Tuning Voltage
UP/DOWN Counter

Pulse Width
Modulation D/A

Horizontal

positioning

Control

AFT

Control

Phase

Comparator

Frequency

Divider

Key

Switch

Control

Mute

Control

Synchronism

Judgment

Frequency

Separator

Oscillator

KDB
KCB
AVB
UHF

MTB

VLB

TU

VDD1
C-S
PD

OSC1
OSC2

D1 D2 D3 D4 D5 D6 CDB CFB CNB ECB

Signal Name

Function

SCB STB HDB CK1 CK2

SNB

Signal Name

Function

D1 ~ D6 Display data output terminal MTB Mute control terminal

SNB Data latch signal TU Tuning control pulse output terminal

CDB Scanning start signal VLB VHF High/Low channel select signal

output terminal
CFB Output voltage changeover signal UHF VHF/UHF select signal
CNB Scanning signal shift lock signal AVB

KCB Key input terminal
KDB

SCB Brightness modulation pulse control AFT AFT voltage input terminal

STB Sampling start signal M1 ~ M10 Mode select signal input terminal

ECB Signal input terminal controlling the

TE1 ~ TE6

Test terminal

segment drive terminal to "H" during
no display

CK1, CK2 Clock pulse output terminal R, G, B Original color

OSC1 Oscillator frequency control terminal RLL "L" level voltage input terminal of
OSC2 video signal

PD Clock pulse adjustment terminal RHH "H" level voltage input terminal of

video signal

C-S Synchronizing pulse input terminal PS1 Mode control signal

HDB Horizontal synchronizing signal input VSS1 Power supply voltage input terminal

terminal

VDD1 VDD voltage input terminal

— 3 —

TOP VIEWS
Linear

PRINTED CIRCUIT BOARDS

C105

SW100

JK100

C100

FU100

D180

JK200

TU200

L102

T100

C115

C309

CN701

C110

L101

C112

H300

C202

C113

R133

R313

R342

R210

R209

R247

R314

C233

R207

F203

C305

T201 T200

L202

R700

D703

R704

R718

R705

C760

C306

C236

C205

C207

R734

F200

R222

R239

C700

R725

R738

C208

D803

R727

D705

C845

R726

C741
R703

R719

C603

F201

R824

C810

C761

R733

C808

R808

C751

L705

C756

JK600

C210

F202

R825

C606

C806

C750

C755

C600

CN700

VR600

VR800

C836

C831
C832

Back Light

L950

C925

R950

C950C951

— 4 —

T950

C927

BOTTOM VIEWS
Linear

R836

R835

R834

R820
R821 C840
R822

Q810
Q811

IC600

R606

IC800

R607

R229

C830

Q806

R833

R817

C835

R816

R641

R611

R615

Q804

R815

C765

D805

R645

C630

R610

CP245

C257

Q801

CP700

R730

C642

C249

Q805

R819

Q803

IC700

R208

R830

VR700

C239
C240

R230

R827

Q802

R810

Q800

C243

C246

IC200

R809

R312

C776

L200

C261

D700

L700

C740
C742

C345

C339

R740

R202

VR200

C263

C291

CP703

R311



R204

R215

C264

C262

VR300

R322

C346

Q200

HP200

C245

R212

R241

R246

C290

C340

R325

VR301

C237

CP221

C259

R236

R223

D500

CP240

C335

R310

IC300

R343

R205
R203
R201

R224

D150

Q300

C347

C235

R502

R541

R550

R545

C351

R115

D152

R306

R307
R336

R503

R501

IC500

C545
R111

+

C301

R335

R331

R330

C350

C234

C140

C146

R305

R326

C265

R500

R102

D155

D100

C550

C145

Q111

C185

CP204

VR100

C135

R103

R117

R101

Q100
Q101

R150

Back Light

FU900

SW701

FU901

SW700

— 5 —

PARTS LIST

LINEAR PCB

Item Code No. Parts Name Specification Applicable Q R

Diodes

D100 2390 1176 Chip diode MA152WK-(TX) TV-1800 Common
D150 2390 1176 Chip diode MA152WK-(TX) TV-1800 Common
D152 2390 1176 Chip diode MA152WK-(TX) TV-1800 Common
D155 2390 1302 Chip diode MA153A-(TX) TV-1800 Common
D180 2390 2450 Chip diode SC016-2-TE12RA TV-1800 Common
D500 2360 1344 Chip zener diode MA3330-M(TX) TV-1800 Common
D700 2390 0469 Chip diode MA157A-(TX) TV-1800 Common
D703 2390 0469 Chip diode MA157A-(TX) TV-1800 Common
D705 2390 1358 Variable diode MA329-(TX) TV-1800 Common
D803 2390 0469 Chip diode MA157A-(TX) TV-1800 Common
D805 2390 1253 Chip diode MA152WA-(TX) TV-1800 Common

Fuse

FU100 3632 0245 Fuse ATSCR0.80A TV-1800 Common

ICs

IC200 2114 1827 Linear IC M51348FP-T1 TV-1800 Common
IC300 2114 3311 Linear IC M52045FP-T1 TV-1800 Common
IC500 2114 2842 Linear IC MSC1169MS-KR1-620 TV-1800 Common
IC600 2114 2464 Linear IC NJM2070M-T1 TV-1800 Common
IC700 2011 2695 LSI MSM6625-01GSK-640E TV-1800 Common
IC800 2116 0119 OP AMP BA10358F-T1 TV-1800 Common

Jacks

JK100 3501 6846 Jack HEC2500-010110 TV-1800 Common
JK200 3501 5439 Jack HSJ1456-01-210 TV-1800 Common
JK600 3501 5439 Jack HSJ1456-01-210 TV-1800 Common

Transistors

Q100 2210 8026 Chip transistor 2SB709A-R(TX) TV-1800 Common
Q101 2230 7011 Chip transistor 2SD601A-R(TX) TV-1800 Common
Q111 2253 0308 Chip transistor 2SD1119-R(TX) TV-1800 Common
Q200 2252 0707 Chip transistor 2SC4238-(TX) TV-1800 Common
Q300 2210 8026 Chip transistor 2SB709A-R(TX) TV-1800 Common
Q800 2230 7011 Chip transistor 2SD601A-R(TX) TV-1800 Common
Q801 2210 8026 Chip transistor 2SB709A-R(TX) TV-1800 Common
Q802 2230 7011 Chip transistor 2SD601A-R(TX) TV-1800 Common
Q803 2230 7011 Chip transistor 2SD601A-R(TX) TV-1800 Common
Q804 2230 7011 Chip transistor 2SD601A-R(TX) TV-1800 Common
Q805 2253 0476 Chip transistor 2SD1149-S(TX) TV-1800 Common
Q806 2230 7011 Chip transistor 2SD601A-R(TX) TV-1800 Common
Q810 2210 8026 Chip transistor 2SB709A-R(TX) TV-1800 Common
Q811 2230 7011 Chip transistor 2SD601A-R(TX) TV-1800 Common

Switches

SW100 3412 0938 Slide switch ESD-11V231 TV-1800C/I/N
SW100 3412 1134 Slide switch ESD-11V221 TV-1800D

Converter

T100 3065 0469 DC-DC converter LC12U-31 TV-1800 Common

Tuners

TU200 1013 5315 Tuner TEPE5-01 TV-1800C/I/N
TU200 1014 8570 Tuner TEPB5-05 TV-1800D

Variable resistors

VR600 2765 0616 Volume RK09H11T-10KB TV-1800 Common
VR800 2765 1582 Volume RK09H11T-100KB TV-1800 Common

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

B

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

B

1

B

1

B

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

C

1

B

1

C

1

C

1

C

1

C

1

Notes: Q – Quantity per unit

R – Rank

— 6 —

BL PCB

Item Code No. Parts Name Specification Applicable Q R

Lamp

LA900 3851 1484 Fluorescent lamp 8.76AD1P2-CA11 TV-1800 Common

Fuses

FU900 3632 0308 Temperature fuse EYP-1BF102L TV-1800 Common
FU901 3632 0308 Temperature fuse EYP-1BF102L TV-1800 Common

Transistors

Q950 2253 0287 Chip transistor 2SD965-R TV-1800 Common
Q951 2253 0287 Chip transistor 2SD965-R TV-1800 Common

Switches

SW700 3412 1029 Switch SKHHAL TV-1800 Common
SW701 3412 1029 Switch SKHHAL TV-1800 Common

Transformer

T950 3012 1001 Inverter trans NT-04 TV-1800 Common

A

1

C

1

C

1

B

1

B

1

C

1

C

1

B

1

Notes: Q – Quantity per unit

R – Rank

— 7 —

MAIN COMPONENT

Item Code No. Parts Name Specification Applicable Q R

1 6611 6560 Display plate CIM-K523 K440953-2 TV-1800C
1 6611 6670 Display plate DAM-K523 K440953-3 TV-1800D
1 6611 6580 Display plate NAM-K523 K440953-4 TV-1800I/N
2 6600 2220 Adhesive tape A-K52 K451-5 TV-1800 Common
3 6608 7271 Adhesive tape B-K502 K410903A-2 TV-1800 Common
4 6609 9680 Jack cover A-K611 K340237-1 TV-1800D/I/N
5 6608 6560 Switch knob A-K526 K311299-1 TV-1800 Common
6 6611 6521 Upper case CIM-K523 K110681A-8 TV-1800C/N
6 6611 6531 Upper case DAM-K523 K110681A-9 TV-1800D
6 6611 6541 Upper case IAM-K523 K110681A-10 TV-1800I
7 3831 0854 Speaker 28-8F-03 TV-1800 Common
8 6608 6330 Tuning button A-K526 K311318-1 TV-1800 Common

9 6608 6340 Ribbon K526 K411841-1 TV-1800 Common
10 6608 6301 Battery spring C-K526 K311313A-1 TV-1800 Common
11 6608 6311 Battery spring D-K526 K311314A-1 TV-1800 Common
12 6611 6610 Side case A-K523 K110691-2 TV-1800 Common
13 6610 9432 BL ass'y K211111B*1 TV-1800 Common

13-1 3851 1484 Fluorescent lamp 8.76AD1P2-CA11 TV-1800 Common
13-2 3632 0308 Temperature fuse EYP-1BF102L TV-1800 Common
13-3 6608 0170 Flat cable A-K541 K411565-1 TV-1800 Common

14 6608 6360 Battery spring A-K526 K311321-1 TV-1800 Common
15 6608 6370 Battery spring B-K526 K411830-1 TV-1800 Common
16 6611 6483 Linear PCB ass'y K340720*2 TV-1800C/I/N
16 6611 6484 Linear PCB ass'y K340720*3 TV-1800D
17 3851 1463 Rod antenna VR60114FA TV-1800 Common
18 6611 6600 Lower case BIM-K523 K110682-4 TV-1800C/D/N
18 6611 6640 Lower case IAM-K523 K110682-5 TV-1800I
19 6611 6620 Battery cover A-K523 K211023-2 TV-1800 Common
20 6611 2300 Stand A-K503 K310518-7 TV-1800 Common
21 6611 6670 Rating plate DAM-K523 K440954-4 TV-1800D
22 6611 6491 Display unit K340722*1 TV-1800 Common
23 5860 2380 Screw PS3 1.7X3.5 Bk TV-1800 Common
24 5860 0420 Screw BT3 1.7X4 Ni TV-1800 Common
25 5860 1449 Screw BT3 1.7X8 Bk TV-1800 Common
26 6605 0011 Screw A-K334 K410096A-1 TV-1800 Common

C

1

C

1

C

1

X

2

X

2

X

1

X

1

X

1

X

1

X

1

C

1

X

1

X

1

X

2

X

1

X

1

B

1

A

1

C

2

C

1

X

1

X

1

B

1

B

1

C

1

X

1

X

1

X

1

C

1

X

1

C

1

C

2

C

7

C

5

C

1

Notes: Q – Quantity per unit

R – Rank

— 8 —

EXPLODED VIEW

23

25

11

24

12

5

13

13-3

10

3

2

8

3

24

9

13-1

13-2

1

2



4

6

7

22

15

17

19

16

14

24

20

25

24

24

18

25

26

21

— 9 —

LINEAR (TV-1800C/I/N)

SCHEMATIC DIAGRAMS

Antenna

External Antenna
Jack

Tuner

IF pad

Batteries

1

DC in

3

2

IF detection Circuit

Earphone

Jack

Speaker

Audio Amplifier Circuit

13

Tuning Voltage Generator Circuit

10

9

Power Switch

4

8

Display Voltage Generator Circuit

To Back Light

6

7

5

11

12

14

To LCD

Power Supply Circuit

Chroma Circuit

Display Controller Circuit

— 11 —

LINEAR (TV-1800D)

Antenna

External Antenna
Jack

Tuner

IF pad

Batteries

1

DC in

3

2

IF detection Circuit

Earphone

Jack

Speaker

Audio Amplifier Circuit

13

Tuning Voltage Generator Circuit

10

9

Power Switch

4

8

Display Voltage Generator Circuit

To Back Light

6

7

5

11

12

14

To LCD

Power Supply Circuit

Chroma Circuit

Display Controller Circuit

— 12 —

BACK LIGHT

— 13 —

600 mV

WAVEFORMS

0.8 V

112 mV

63.5 µs 63.5 µs

1 Q200 Collector 2 IC200 Pin 19



0.9 V

0.24 µs

4 IC300 Pin 23

63.5 µs

5 IC300 Pins 10, 11, 12

3.2 V

63.5 µs

63.5 µs

3 IC200 Pin 18

2.0 V

6 IC300 Pin 5

600 mV

63.5 µs

3.0 V

63.5 µs

10 V

5.6 µs

0 Q111 Base

5.6 µs

130 µs

4.0 V

600 mV

8 IC300 Pin 17 IC300 Pin 4

100 ns

9 Q111 Collector

2.8 V

3.2 V

360 ns

B IC700 Pin 14A IC700 Pin 17

2.8 V

63.5 µs

D IC700 Pin 12C Q806 Base

— 14 —

MA0200471A