Casio TV-5100D Service manual

(with price)

POCKET TELEVISION

TV-5100D

SEPTEMBER 1994
	Page
Specifications.............................................................................................	1
Block Diagram ...........................................................................................	2
Adjustment
Linear PCB..........................................................................................	3
PCB ...........................................................................................................	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

INDEX

R

SPECIFICATIONS

	Item		Specification
1.	Reception channels	VHF : —	UHF : 21 ~ 68 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
		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
		Car adaptor		: CA-K65
		RF connector		: CF-13
		Antenna matching device : AS-35S
14.	Body color	Black

— 1 —

BLOCK DIAGRAM

Antenna

			3	IC200	4	IC600	Speaker
1	TU200	2	Q200	Video
					VR600
				Sound Det.		Audio
	Tuner		IF Amp.	FM		Amp.
				AFT Circuit	Volume
				AGC Circuit	Control

	7	IC270	IC300
		5
	Tuning
	Voltage		Chroma	LCD
	Generator
			Circuit

6 IC700

Display

Control

Auto-Tuning

Control

		VCC2 (4.5±0.02V)
	Power	VCC7 (26.5~31.3V)
		VCC6 (10.8~12.5V)
	Supply
		VEE1 (–8.5~–7.5V)
		VEE2 (–19.8~–17.2V)

1— Color Tuner: TU200 TEPB5-02

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 IR3P96B

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

T300

Top View

— 3 —

TP2
Pad IF	TP7

VR204

TP3

TP4

VR748 TP6

	TP5	VR301
	VR302
	TP8	VR300
	VR303

TP1

VR100

Bottom View

Equipment Connection / Adjustment Procedure

	VCC2-1 Voltage Setting
TV-5100	Voltmeter
Set
	Output
	TP1

Input

Input

Input

Adjust

Output

Output

Result

Connection

Point

Signal

Connection

Point

VR100

Voltmeter

TP1

Adjust for 4.50 ± 0.02 V

reading on voltmeter.

— 4 —

Video Detection Coil Adjustment

	* Open soldering pad IF.
	Pattern		Signal		TV-5100
	generator		generator		Set		Oscilloscope
						Low-pass
				Input		filter
					Output
				TP2		TP3
	Input	Input	Input	Adjust	Output	Output	Result
	Connection	Point	Signal		Connection	Point
	Pattern		Color bar
	generator				Low-pass filter	TP3 Adjust for DC level at mini-
		TP2	39.5 MHz	T200
	Signal				Oscilloscope
			48 ± 3 dBμ
	generator

AFT Coil Adjustment

* Open soldering pad IF.

Sweep	TV-5100	Oscilloscope	Voltmeter
generator	Set
Input		Output
TP2		TP4

39.5±5 MHz

Adjust for 1.4 ± 0.2 V reading

Sweep

on voltmeter.

TP2

(Sweep) Marker:

T201

Voltmeter

TP4

Confirm that the marker is at

generator

39.5 MHz

Oscilloscope

the middle of S-curve on oscil-

70 dBμ

loscope.

Contrast Adjustment

* Open soldering pad IF.

VCC2-3(5V)

Pattern

Signal

TV-5100

10 kohm

generator

generator

Set

Oscilloscope

CP327

Input

Output

TP2

TP5

Pattern

Color bar

generator

Adjust step form wave to read

TP2

39.5 MHz

VR300

Oscilloscope

TP5

Signal

2.6 ± 0.1 Vp-p.

70 dBμ

generator

— 5 —

Color, BCC Adjustment

* Open soldering pad IF.
Pattern		Signal		TV-5100
generator		generator		Set		Oscilloscope
			Input		Output
			TP2		TP5
Input	Input	Input	Adjust	Output	Output	Result
Connection	Point	Signal		Connection	Point
						Adjust VR301 so that the
Pattern		Color bar				difference	Pulse A Pulse B
generator						between pulse
		39.5 MHz	VR301					Pulse C
Signal	TP2			Oscilloscope	TP5 A and B is less			Pulse D
		70 dBμ	T300			than 0.5 ± 0.1V.
generator
						Adjust T300 so
						that the difference between
						pulse C and D is less than
						0.1V.
			AGC Adjustment
Pattern		Signal		TV-5100
generator		generator		Set		IF levelmeter
			Input		Output
			TP7		TP2

Pattern
generator		Color bar				Adjust for 84	±	μ
								1 dB
TV Signal	TP7	65 ± 5 dBμ	VR204	IF levelmeter	TP2	reading on the IF levelmeter
generator

— 6 —

Vcom Adjustment

TV-5100

Oscilloscope

Set

Output

TP8

Input

Input

Input

Adjust

Output

Output

Result

Connection

Point

Signal

Connection

Point

Adjust VR302 so that square-

VR302

Oscilloscope

TP8

wave to read 5.0 ±0.1V.

Adjust VR303 so that high level

VR303

of the square-wave is at

0.5±0.1V.

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

TV-5100		Photo senser amp.
				Oscilloscope
Set	Photo
			Band-pass
	diode
			filter
	ON	H
		M
	OFF	L
	AV-C1
			Photo sensor
		VR303	amp.	Adjust for ripple at minimum.
			Band pass filter
			Oscilloscope

Free-running Frequency Adjustment

TV-5100	Frequency
Set	Counter

Output

TP6

VR748

Frequency

TP6

Adjust for a reading of 15.625 ±

Counter

0.1 KHz.

— 7 —

PRINTED CIRCUIT BOARDS

TOP VIEWS

T

Linear

ANT JK200

C202

TU200

C210

T

F203

R290

1

R208

1 T201 T

F200

T

F203

C207

C242

L201

AFT

R222

C208

T200

C792

F2021

F201

LLD

SW100

CN700

C329

C331

C717

F202

R716

R715

F201 VSS2

C305

VCOM

GSRT

R727

VGH

GRES

GPCK

R729

VGL

VSS1

R728

VB

VA

Vg

VC

R702R706

R704

SRT

VSL

IC700

MCLK

VSH

R781

CLR

VSS3

OM675

HCNT

R780

R739R738

R

1

701

R703

FU100

C317 T300

R 740

C315

C771

R745 R744 C

L760

C306

C332 R747

772

1R761

L756

R743

C330

IC701

VR640

C308

VR343

R308

R339

C774

R748 R350

C351

H300 R323

R351 R352

610D-L-B

Q300 R353

CN701

C160

R324

C110

R325

C795

C162

C156 C112

C350

JK250

JK100

C603

L102

C116

T100

C606

D180

1

L101

C130

C114

R600

C120

C100

JK600

C118

BL

L950 C925

C927

T950

— 8 —