Casio JY-70B, JY-70C, JY-70I, JY-70N Service Manual

JY-70B (NTSC M / M)

INDEX

JY-70C (PAL B / G,H)
JY-70I (PAL B / G)
JY-70N (PAL B / G,H)

(KX-516)

(without price)

JUL . 19 98

R

CONTENTS

Page

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

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

PRINTED CIRCUIT BOARDS...................................................................3

PARTS LIST..............................................................................................7

EXPLODED VIEW. ..................................................................................11

SCHEM A TI C DI AG RAM S..... ...... ... ...... ... ...... ... ...... ... ...... ... ...... ... ...... ... ...1 2

WAVE FO RMS........... ... ...... ... ...... ... ...... ... ...... ... ...... ... ...... ... ...... ... ...... ... ...1 6

SPECIFICATIONS

Item Specification

1. Power voltage DC 6.0 V

JY-70B Approx. 3.6 W

2. Power consumption
JY-70C/N/I Approx. 3.3 W

JY-70B Approx. 600 mA

3. Current consumption
JY-70C/N/I Approx. 550 mA

JY-70B Approx. 3.5 hours

4. Battery life (with alkaline batteries)
JY-70C/N/I Approx. 4.0 hours

Batteries : 4 × LR6 (D) size batteries

5. Power supply Car adaptor : CA-K65

AC adaptor : AD-K64

Earphone jack : 3.5 ø mini
External power jack : 6.0 V DC IN

6. Connection terminal

External antenna jack : 3.5 ø mini
(only JY-70C)

Audio / Video jack : 3.5 ø mini

7. Screen size 2.3 inches

8. Number of picture elements 39,600 (360 × 110) dots

9. Dimension 126 mm (W) × 39 mm (D) × 78 mm (H)

10. Weight Approx. 220 g without batteries

Model Color System TV System Channel

JY-70B NTSC M/M US VHF: 2 ~ 13 ch UHF: 14 ~ 69 ch

JY-70C/N PAL B/G,H CCIR VHF: 2 ~ 12 ch UHF: 21 ~ 69 ch

JY-70I 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 (3.95 ± 0.02 V)
VCC7 (34.2 ~ 41.8 V)
VEE1 (– 6.03 ~ – 7.37 V)

VR800

Brightness
Control

3 IC200

Video
Sound Det.
FM
AFT Circuit
AGC Circuit

5

6

IC300

Chroma
Circuit

IC700

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

8 Q800 ~ Q803, Q805, Q806

Display
Voltage
Generator

VR600

Volume
Control

4 IC600 Speaker

Audio
Amp.

Common
Driver

LCD

Segment
Driver

1 — Color Tuner: TU200 TEAA1(JY-70B) / TEPE5-01(JY-70C/N/I)

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

2 — Video IF Amp.: Q200 2SC3082

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 M52042FP

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

6 — Osc./A-D Converter/Display Control/ Auto-Tuning Control : IC700 ML9661GA-6006

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 BA10358F

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

8 — Display Voltage Generator: Q800 ~ Q803 Q805 Q806 2SD1819A, 2SB1218A, 2SD1149S

Generates the display voltages V0 ~ V4 with VEE1 and VCC7 outputs from the power supply.

— 2 —

AD-PCB(JY-70B/C/N/I)

PRINTED CIRCUIT BOARDS

Top View

Bottom View

— 3 —

L-PCB(JY-70B)

Top View

Bottom View

— 4 —

L-PCB(JY-70C/N/I)

Top View

Bottom View

— 5 —

BL-PCB(JY-70B/C/N/I)

Top View

Bottom View

— 6 —

PARTS LIST

JY-70B: NTSC (USA,Others)
JY-70C: PAL (Others)

JY-70I: PAL (Itary)

AD PCB ASS'Y

Item Code No. Parts Name Specification Applicable Q R

Connector

3502 2214 CONNECTOR 52435-2291 JY-70 common 1 X
3502 2425 CONNECTOR 52271-1490 JY-70 common 1 X
3502 2426 CONNECTOR 52288-0211 JY-70 common 1 X

ICs

2012 6038 LSI ML9661GA-6006 JY-70 common 1 C
2114 2464 IC / LINEAR NJM2070M-T1 JY-70 common 1 C
2114 3311 IC / LINEAR M52045FP-T1 JY-70C/I/N common 1 C

2114 3458 IC S-81230SG-QB-T1 JY-70 common 1 C
2114 5853 IC TK11239BMCL JY-70B common 1 C
2116 0119 IC BA10358F-T1 JY-70 common 1 C

Jacks

3501 3773 JACK HSJ6063-01-410 JY-70 common 1 C
3501 5439 JACK HSJ1456-01-210 JY-70 common 1 C

Transistors

2251 0189 TRANSISTOR / CHIP 2SB1218A-R(TX) JY-70 common 2 B
2253 0133 TRANSISTOR / CHIP 2SD1819A-R(TX) JY-70 common 2 B
2253 0476 TRANSISTOR / CHIP 2SD1149-S(TX) JY-70 common 1 B

Switch

3412 1848 SWITCH / TACT SKQGAA JY-70 common 1 C

Variable Resistors

2765 0616 VOLUME RK09H11T-10KB JY-70 common 1 C
2765 0623 VOLUME RK09H11T-20KB JY-70 common 1 C

Oscillator

2590 2717
2590 2731 OSCILLATOR HD-49-3.58M JY-70B common 1 C

OSCILLATOR HD-49-4.43M JY-70C/I/N common 1 C

JY-70N: PAL (Europe,Germany)

Notes : Q - Quantity used per unit

R - Rank

— 7 —

LINEAR PCB

Item Code No. Parts Name Specification Applicable Q R

Diodes

2390 1183 DIODE/CHIP MA143A-(TX) JY-70B common 1 C
2390 1190 DIODE ERA15-01Y JY-70 common 1 C
2390 1470 DIODE/CHIP MA142WK-(TX) JY-70 common 1 C
7101 1194 DIODE/CHIP MA111(TX) JY-70B common 3 C
7101 1194 DIODE/CHIP MA111(TX) JY-70C/I/N common 2 C

Fuse

2797 5598 FUSE/CHIP PI-R429.750 JY-70 common 1 B

ICs

2114 1827 IC/LINEAR M51348FP-T1 JY-70 common 1 C
2114 3150 IC MB3776APNF-EF JY-70 common 1 C
2114 5853 IC TK112939BMCL JY-70B common 1 C

Jacks

3501 5439 JACK HSJ1456-01-210 JY-70 common 1 C
3501 8281 JACK HEC0811-010010 JY-70 common 1 C

Transistors

2251 0189 TRANSISTOR/CHIP 2SB1218A-R(TX) JY-70B common 2 B
2252 1050 TRANSISTOR/CHIP 2SC3082K-T146Q JY-70 common 1 B
2253 0133 TRANSISTOR/CHIP 2SD1819A-R(TX) JY-70B common 4 B
2253 0133 TRANSISTOR/CHIP 2SD1819A-R(TX) JY-70C/I/N common 1 B
2253 0308 TRANSISTOR/CHIP 2SD1119-R(TX) JY-70 common 1 B

Switch

3412 0938 SWITCH/SLIDE ESD11V231 JY-70 common 1 C

Converter

3065 0715 CONVERTER/DC-DC LC128-16 JY-70B common 1 B
3065 0672

Tuner

1014 9890 TUNER TEAA1-001A JY-70B common 1 C
1013 5315 TUNER TEPE5-01 JY-70C/I/N common 1 C

CONVERTER/DC-DC LC12U-40 JY-70C/I/N common 1 B

BL PCB ASS'Y

Item Code No. Parts Name Specification Applicable Q R

Transistors

2253 0287 TRANSISTOR 2SD965-R JY-70 common 1 B

Transformer

3012 1588 INVERTER TRANS C-8123 JY-70 common 1 B

Notes : Q - Quantity used per unit

R - Rank

— 8 —

COMPONENT

Item Code No. Parts Name Specification Applicable Q R

1 6613 1891 PCB ASSY/LINEAR/A/D K341072*2 JY-70B common 1 B
1 6613 2866 PCB ASSY/LINEAR/A/D K341072*3 JY-70C/N/I common 1 B
2 6613 1895 CASE/UPPER/GREEN K240876*2 JY-70B/C/N common 1 C
2 6613 1896 CASE/UPPER/ORANGE K240876*3 JY-70B/C/N common 1 C
2 6613 2859 CASE/UPPER/GREEN K240876*4 JY-70I common 1 C
2 6613 2861 CASE/UPPER/ORANGE K240876*5 JY-70I common 1 C
3 2725 1348 LCD MODULE CMG23CO-TO JY-70 common 1 B
4 3851 2093 LAMP/FLUORESCENCE 3064BB-CA48 JY-70 common 1 A

4-1 6612 9720 CASE/REFLECTOR K140418-1 JY-70 common 1 X

5 6613 0003 PCB ASSY/BL K341109*1 JY-70 common 1 B

5-1 6612 9930 CABLE/BL K441248-1 JY-70 common 1 X

6 6612 9730 PLATE/DIFFUSION K340975-1 JY-70 common 1 X
7 6613 1910 PLATE/DISPLAY K340978-2 JY-70B common 1 X
7 6613 2910 PLATE/DISPLAY K340978-3 JY-70C common 1 X
7 6613 2920 PLATE/DISPLAY K340978-4 JY-70I/N common 1 X
8 6612 9680 KNOB/POWER/FOR GREEN K340972-1 JY-70 common 1 C

8 6613 2090 KNOB/POWER/FOR ORANGE K340972-2 JY-70 common 1 C
8-1 6612 9790 SLIDER/SWITCH K240804-1 JY-70 common 1 C
8-2 6612 9800 RAIL/SWITCH/FOR GREEN K240805-1 JY-70 common 1 X
8-2 6613 2100 RAIL/SWITCH/FOR ORANGE K240805-2 JY-70 common 1 X

9 6612 9690 BUTTON/TUNING/FOR GREEN K340973-1 JY-70 common 1 C

9 6613 2070 BUTTON/TUNING/FOR ORANGE K340973-2 JY-70 common 1 C
9-1 6612 9710 GUIDE/TUNING BUTTON/FOR GREEN K340974-1 JY-70 common 1 X
9-1 6613 2080 GUIDE/TUNING BUTTON/FOR ORANGE K340974-2 JY-70 common 1 X

10 3831 1078 SPEAKER T028S14A0020 JY-70 common 1 C
11 6612 9921 CABLE/FLAT K441247A-1 JY-70 common 1 X
12 3851 2091 ANTENNA/STRAP/FOR GREEN SA-1310-1 JY-70 common 1 C
12 3851 2100 ANTENNA/STRAP/FOR ORANGE SA-1310-2 JY-70 common 1 C
13 6612 9700 COVER/ANTENNA/GREEN K240800-1 JY-70 common 1 X
13 6613 2180 COVER/ANTENNA/ORANGE K240800-2 JY-70 common 1 X
14 6613 0140 CAP/DISPLAY/GREEN K341063*1 JY-70 common 1 C
14 6613 2900 CAP/DISPLAY/ORANGE K341063*2 JY-70 common 1 C
15 6612 9880 CORD/CAP/FOR GREEN K441265*1 JY-70 common 1 X
15 6613 1900 CORD/CAP/FOR ORANGE K441265*2 JY-70 common 1 X
16 6612 9660 GRIP/FOR GREEN K240798-1 JY-70B/C/N common 1 X
16 6613 2110 GRIP/FOR ORANGE K240798-2 JY-70B/C/N common 1 X
16 6613 3080 GRIP/FOR GREEN K240798-3 JY-70I common 1 X
16 6613 3090 GRIP/FOR ORANGE K240798-4 JY-70I common 1 X
17 6612 9840 HOOK/STRAP K340980-1 JY-70 common 2 X
18 6613 0123 CASE/LOWER/GREEN K240868*1 JY-70 common 1 X

18 6613 1888 CASE/LOWER/ORANGE K240868*2 JY-70 common 1 X
18-1 6609 9061 SPRING/BATTERY K440159A-1 JY-70 common 1 X
18-2 6609 9071 SPRING/BATTERY K440243A-1 JY-70 common 1 X
18-3 6020 7658 SPRING/BATTERY P408A-1 JY-70 common 1 X
18-4 6020 7666 SPRING/BATTERY P409A-1 JY-70 common 1 X

19 6612 9630 COVER/BATTERY K240797-1 JY-70 common 1 C

20 6612 9740 STAND/GREEN K340976-1 JY-70 common 1 C

20 6613 2170 STAND/ORANGE K340976-2 JY-70 common 1 C

Notes : Q - Quantity used per unit

R - Rank

— 9 —

Item Code No. Parts Name Specification Applicable Q R

21 6612 9750 HOLDER/STAND K340977-1 JY-70 common 1 X

6609 9680 COVER/JACK K340237-1 JY-70B/I/N common 1 C
6608 0922 LABEL K411564B-2 JY-70B common 1 X
6613 1920 PLATE/RATING/GREEN K441267-2 JY-70B common 1 X
6613 1930 PLATE/RATING/ORANGE K441267-3 JY-70B common 1 X

6613 1940 LABEL K441486-1 JY-70 common 1 X
E1 5861 3683 E-RING E-1.5 JY-70 common 2 X
S1 5860 3381 SCREW PS3 1.7X4 BK JY-70 common 2 X
S2 5860 0420 SCREW BT3 1.7X4 NI JY-70 common 8 X
S3 5860 3549 SCREW BT3 1.7X10 NI JY-70 common 2 X
S4 6604 9980 SCREW K410188-1 JY-70 common 2 X
S5 6630 7430 SCREW K440305-1 JY-70 common 3 X

Notes : Q - Quantity used per unit

R - Rank

— 10 —

EXPLODED VIEW

14

7

3

17

16

S1

10

E1

S2

S5

9-1

20

15

8

2

S2

17

E1

5

4

5-1

9

S2

21

S2

S2

8-1
8-2

S2

6

4-1

S2

1

19

18-4

18-3

S4

18-2

— 11 —

18

18-1

13

11

S3

12

AD CIRCUIT
AD-CIR-K0516 (JY -70B/C/N/I)

SCHEMATIC DIAGRAM S

To L-PCB To BL-PCB

Chroma Circuit

4

8

7 6 5

11

Display Voltage Generator
Circuit

A/V Jack

Tuning Voltage Generator
Circuit

Audio Amplitier Circuit

To LCD

10

Earphone
Jack

12

Speaker

Display Controller
Circuit

— 12 —

LIN E AR CIRCUIT
L-CIR-K0516 (JY -70B)

External
Antenna
Jack

1

2

3

To AD-PCB

To
Batteries

Tuner

IF Detection Circuit

IF Pad

DC in

9

— 13 —

Power Supply Circuit

LIN E AR CIRCUIT
L-CIR-K0516 (JY -70C/N/I )

External
Antenna
Jack

1

2

3

To AD-PCB

To
Batteries

Tuner

IF Detection Circuit

IF Pad

DC in

9

— 14 —

Power Supply Circuit

BACK LIGHT CIRCUIT
BL-CIR-K051 6 ( JY-70B/C/N/I)

— 15 —

3.0 mV

WAVEFORMS

0.9 V

160 mV

63.5 µs 63.5 µs

1 Q200 Collector 2 IC200 Pins 19, 20

0.6 V

0.24 µs

4 IC300 Pin 23

63.5 µs

5 IC300 Pins 10, 11, 12

3.0 V

63.5 µs

63.5 µs

3 IC200 Pin 18

1.4 V

6 IC300 Pin 5

750 mV

63.5 µs

3.3 V

63.5 µs

12 V

8.5 µs

0 IC700 Pin 9

540 ns

3.2 V

8 IC300 Pin 17 IC300 Pin 4

130 µs

9 Q111 Collector

600 mV

3.2 V

63.5 µs

B IC700 Pin 8A Q806 Base

— 16 —

CASIO TECHNO CO.,LTD.

Overseas Service Division

8-11-10, Nishi-Shinjuku
Shinjuku-ku, Tokyo 160-0023, Japan