Casio TV-5100B Service manual

(with price)

INDEX

POCKET TELEVISION

TV-5100B

AUGUST 1994

Page

Specifications.............................................................................................1

Block Diagram ...........................................................................................2

Adjustment

Linear PCB..........................................................................................3

Printed Circuit Boards................................................................................8

Wiring Diagram........................................................................................10

Electrical Parts List ..................................................................................11

Mechanical Parts List...............................................................................18

Exploded View / Disassembly..................................................................19

IC and Transistor Lead Identification and Internal Circuitry.....................20

Schematic Diagrams and Waveforms .....................................................23

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. 3.0 W

4. Current consumption Approx. 500 mA

5. Battery life (with alkaline batteries) Approx. 2.0 hours

Batteries : 4 AA size batteries

6. Power supply Car adaptor : CA-K65 AC adaptor : AD-K65, 64

Earphone jack : 3.5ø mini

7. Connection terminals External power jack : 6.0 V DC IN External antenna jack : 3.5ø mini Audio / Video jack : 3.5ø

8. Screen size 1.8 inches

9. No. of Picture element 61,380 (220 × 279) dots

10. Dimensions 92 mm (H) × 105 mm (W) × 80 mm (D) 3-11/16" (H) × 4-1/5" (W) × 3-1/5" (D)

11. Weight 290 g excepting batteries

10.2 oz excepting batteries

12. Standard accessories Test batteries (R6 x 4)

13. Options AC adaptor :AD-K65, 64 Car adaptor :CA-K65 RF connector :CF-13 Antenna matching device :AS-35S

14. Body color Black

— 1 —

Antenna

BLOCK DIAGRAM

Power Supply

1 TU200 2 Q200

IF Amp.Tuner

IC270

Tuning Voltage Generator

VCC2 (4.5±0.02V) VCC7 (25.9~31.3V) VCC6 (10.8~12.0V) VEE1 (–8.5~–7.5V) VEE2 (–19.8~–17.2V)

3 IC200

Video Sound Det. FM AFT Circuit AGC Circuit

Det

IC300

Chroma Circuit

IC700

Display Control Auto-Tuning Control

4 IC600 Speaker

VR600

Audio

Amp. Volume Control

LCD

1 — Color Tuner: TU200 TEPU5-02

Selects a desired radio wave and changes it to the video IF signal.

2 — Video IF Amp.: Q200 2SC4670

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 IR3P90B

Generates the tricolor (red, green, and blue) from the video signal.

6 — Display Control/ Auto-Tuning Control : IC700 MSM6770GS

Controls the display.

7 — Tuning Voltage Generator: IC270 BA10358F

Generates the tuning voltage with the tuning pulse (TU) output from 6.

— 2 —

ADJUSTMENT

LINEAR PCB Items To Be Adjusted

Item Measuring Instrument

VCC2-1 voltage setting Voltmeter Video detection coil adjustment TV signal generator, pattern generator, oscilloscope,

low-pass filter AFT coil adjustment Sweep generator, oscilloscope, voltmeter Contrast adjustment TV signal generator, pattern generator, oscilloscope AGC adjustment TV signal generator, pattern generator, IF levelmeter Clock adjustment Voltmeter

Adjustment And Test Point Locations

T201

T200

Top View

— 3 —

Pad IF

TP2

TP7

VR204

TP5

TP8

TP3

TP6

VR748

VR325

VR308

VR330

Bottom View

TP4

VR311

VR301

TP1

VR100

Equipment Connection / Adjustment Procedure

VCC2-1 Voltage Setting

TV-5100

Set

Output

TP1

Input Input Input Output Output

Connection Point Signal Connection Point

Adjust Result

VR100

Voltmeter

TP1

Adjust for 4.50 ± 0.02 V reading on voltmeter.

— 4 —

* Open soldering pad IF.

Pattern generator

Signal generator

Video Detection Coil Adjustment

TV-5100

Set

Input Output

TP2

TP3

Oscilloscope

Low-pass filter

Input Input Input Output Output

Connection Point Signal Connection Point

Adjust Result

Pattern generator

Signal generator

TP2 T200 TP3

Color bar

45.75 MHz 45 ± 3 dBµ

Low-pass filter Oscilloscope

AFT Coil Adjustment

* Open soldering pad IF.

Sweep generator

Input

TP2

TV-5100

Set

Oscilloscope Voltmeter

Output

TP4

45.75±5 MHz

Sweep generator

(Sweep) Marker:

TP2 T201 TP4

45.75 MHz

Voltmeter Oscilloscope

70 dBµ

Adjust for DC level at mini-

Adjust for 1.4 ± 0.2 V reading on voltmeter. Confirm that the marker is at the middle of S-curve on oscilloscope.

* Open soldering pad IF.

Pattern generator

Signal

TP2 VR301 TP5

Color bar

45.75 MHz 70 dBµ

generator

Contrast Adjustment

Signal generator

Input TP2

Oscilloscope

— 5 —

TV-5100

Set

VCC2-3(5V)

10 kohm

Oscilloscope

CP302 Output

TP5

Adjust step form wave to read

2.5 ± 0.1 Vp-p.

* Open soldering pad IF.

Pattern generator

Signal generator

Color Adjustment

TV-5100

Set

Oscilloscope

Input TP2

Input Input Input Output Output

Connection Point Signal Connection Point

Pattern generator

Signal

TP2 VR311 Oscilloscope TP5

Color bar

45.75 MHz 70 dBµ

Adjust Result

generator

Tint Adjustment

* Open soldering pad IF.

Pattern generator

Signal generator

TV-5100

Set

Input TP2

Output TP5

Adjust VR311 so that the difference between pulse A and B is less than 0.1V.

Oscilloscope

Output TP5

Pulse BPulse A

Pattern generator

Signal generator

Pattern generator

TV Signal generator

Color bar

45.75 MHz

TP2 VR325 Oscilloscope TP5

70 dBµ

AGC Adjustment

Signal generator

TV-5100

Set

Input TP7

Color bar

TP7 VR204 IF levelmeter TP2

65 ± 5 dBµ

Adjust VR325 so that the difference between pulse A and B is less than 0.1V.

IF levelmeter

Output TP2

Adjust for 84 ±1 dBµ reading on the IF levelmeter

Pulse BPulse A

— 6 —

Vcom Adjustment

TV-5100

Set

Oscilloscope

Output TP8

Input Input Input Output Output

Connection Point Signal Connection Point

Adjust Result

VR328

Oscilloscope TP8

VR330

* Place a photo diode on the middle of the display plate.

Photo senser amp.

TV-5100

Set

Photo diode

ON OFF

Band-pass

H M L

filter

Adjust VR328 so that squarewave to read 6.0 ±0.1V. Adjust VR330 so that high level of the square-wave is at 0.0 ±0.25V.

Oscilloscope

AV-C1

Photo sensor amp.

VR330

Band pass filter Oscilloscope

Free-running Frequency Adjustment

TV-5100

Set

Frequency

Counter

Output TP6

VR748 TP6

Frequency Counter

Adjust for ripple at minimum.

Adjust for a reading of 15.73 ±

0.01 KHz.

— 7 —

TOP VIEWS Linear

PRINTED CIRCUIT BOARDS

JK200

C210

SW 100

100

JK100

C300

R736

C160

C202

C302

C150

F203

R734

C162

T100

C319C304

R729

R739

C771

C336

C110

T201

R728

R737 R741

C774

C112

T200

R727

C772

L102

R740

R761

IC701

C373

C156

C116

C207 C246

F202

OM-675

R760

C603

R222

R717

IC700

H300

C215

TU200

C208

C787

C781

R342

F201

L756

C786

R756

R208

R718

R714

R704

C788

JK250

F200

L201

C242

CN700

R757

VR640

VR343

D180

C100

C130

C120

L101

C925L950

C118

— 8 —

C606

C114

T950

C600

R601

C927

R600

JK600

+ 19 hidden pages