Casio QV-10B Troubleshooting guide

(with price)

QV-10B(KX-720B)

JUL. 1995

CONTENTS

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

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

CIRCUIT OPERATION .................................................................................. 3

ADJUSTMENT............................................................................................. 13

DISASSEMBLY AND ASSEMBLY.............................................................. 17

PRINTED CIRCUIT BOARDS ..................................................................... 18

ELECTRICAL PARTS LIST......................................................................... 20

MECHANICAL PARTS LIST ....................................................................... 30

EXPLODED VIEW ....................................................................................... 31

PARTS LIST FOR ACCESSORIES............................................................. 32

REPAIR METHOD ....................................................................................... 33

SCHEMATIC DIAGRAMS ........................................................................... 35

WAVEFORMS.............................................................................................. 38

— 1 —

SPECIFICATIONS

Item Specification

1. Recording System Digital (JPEG based)/Field recording

2. Signal System NTSC

3. Recording Medium Built-in 16-Mbit flash memory

4. Number of pages 96

5. Delete Functions Single page; All pages (with page protect feature)

6. Imaging Device 1/5-inch CCD (Total Number of Pixels: 250,000)

7. Lens Fixed focus with macro position; F2/f = 5.2mm

8. Aperture F2/F8 manual switching

9. Focal Length F2/NORMAL : 60cm to 310cm;

F2/MACRO :13cm to 16cm

F8/NORMAL :28cm to

∞

;

F8/MACRO :10cm to 24cm

(from lens protection filter)

10. Light Metering TTL center point by photographic element

11. Exposure Metering Aperture priority AE

12. Exposure Range EV +5 to 18

13. Exposure Adjustment -2EV to +2EV

14. Shutter System Electronic

15. Shutter Speed 1/8 to 1/4000 second

16. White Balance Automatic

17. Self-timer 10-second

18. Monitor 61,380-pixel 1.8-inch TFT low-glare color LCD;

doubles as finder

19. Terminals DIGITAL; VIDEO OUT; DC IN 6V

20. Power Supply Batteries (AA-size Alkaline batteries X 4)/AC Adap-

tor (AD-C60)

21. Battery Life Approximately 120 minutes

22. Dimensions 66(H) X 130(W) X 40(D)mm /

2.6" (H) X 9" (W) X 1.6" (D)

23. Weight Approximately 190g / 6.7oz (excluding batteries)

24. Accessories Wirst strap; soft case; special video cable; AC adap-

tor (AD-C60) Alkaline batteries (LR6 X 4); cleaning

cloth; owner's manual; personal computer connec-

tion kit

— 2 —

CCD V RAM

HM53812BJ8

Gate Array

HG51B167FB

Flash

Memory

TC5816FT-1

D RAM

HM514B00

ALJ8

Power Supply

Circuit

DC IN (6V) Key

CPU

HD6477034F16

Key PCB

AC adaptor

Battery x 4

IC400

MSM6770GS

IC300

IR3P90Y

LCD

3Linear PCB

1Camera Unit: It is used to provide color information.

2Digital PCB: It controls the CCD, compressed data, stores image in memory.

3Linear PCB: It generates the tricolor and controls the LCD display.

4LCD: 61,380-pixel 1.8-inch Thin Film Transistor low-glare color LCD.

5 VIDEO OUT(Video I/O): Use this terminal when connecting to the VIDEO IN terminal of

a TV, video tape deck, video printer, or other similar device.

6DIGITAL (SERIAL I/O): Use this terminal when connecting to a personal computer.

5VIDEO OUT (Video I/O)

6DIGITAL (Serial I/O)

1Camera PCB 2

2Digital PCB

BLOCK DIAGRAM

— 3 —

CAMERA UNIT (CAMERA PCB)

The camera unit is composed a lens, color filter, CCD (IC802), driver (IC800) and signal

processor (IC802). It produces voltages R, B, and G, for the colors red, blue, and green

when light from a scene is focused on the surface. These voltage values vary according

to the intensity of the respective color being scanned.

The camera unit must be replaced with whole unit when it is defective, because the precise

adjustment is required when the individual parts are replaced, and can be done only at our

factory.

2Color

Filter

Ye,Cy,Gr

color signal D0 ~ D7

IC800

Driver

VI1~ VI4

VS1 ~ VS4

PHI1~PHI4

PHS1~PHS4

MCK,

HRS2,

FTTRG,

STTRG,

CCODE,

ENDFLG

3IC802 (CCD)

Sample Hold,

AGC

CCD IN 8bit A/D

Converter

Timing

Generator

4IC801

CPU

Data Bus

D RAM

1Lens

Concentrates light rays to a point.

2Color filter

The striped color filter in front of the CCD detector is used to provide color information.

It has three colors, yellow, green and cyan.

Array of color filter and signal processing (IC801) for camera are extremely close relationship.

Ye G Cy Ye G Cy

Array of color filter

Red

Blue

Green

White

Mg=Blue+RedYe=Red+Green

Cy=Blue+Green

Three Primary colors

1Lens

Digital PCB

1 2 3 ~ 506 507 508

Camera PCB

CIRCUIT OPERATIONS

— 4 —

3CCD (IC802)

A charge-coupled device in which charges are introduced when light from a scene is

focused on the surface of the device. The image points are accessed sequentially to

produce a television-type output signal.

Image pickup

Storage

Horizontal shift

508(H)

532(H)

500(V)

492(V)

Output

Amp.

PHIH1

PHIH2

PHIS4

PHIS2

PHIS1

PHIS3

PHI4

PHI3

PHI2

PHI1

VOG

VGG

VDD 8

Vout 9

PHIR 7

4Camera Signal Processor (IC801)

Sample Hold

Selects a desired signal from the CCD.

Timing Genarator

Generates the clock pulse for the CCD.

8-bit AD converter

Analog signal from the CCD is converted into 8-bit digital signal of the luminance and the color

difference B-Y and R-Y signal. .

Sample Hold,

AGC

From CCD

8bit A/D

Converter

Timing

Generator

D0~D7

to CCD From/to CPU

Effective picture element:

249,936 = 508 (H) x 492 (V)

PHIS1~PHIS4:

Clock pulse for the storage.

PHI1~PHI4:

Clock pulse for the image pickup.

PHIH1~PHIH2:

Clock pulse for the horizontal shift

PHIR:

CCD analog signal output.

D0~D7:

Digital signal of the luminance and the

color difference B-Y and R-Y signal.

CCD IN:

CCD analog signal input.

VI1~VI4/VS1~VS4:

Clock pulse for the CCD control signal.

14 15

12 13

— 5 —

DIGITAL PCB

Key Input

TFT LCD

DC in +6V

Battery

ROM RAM

DMAC

BSC

SCI, Timmer

I/O Port

CPU

16M Flash Memory

4M D RAM

5IC601

Power Supply

+5V +18V -10V

Linear

PCB

IC300

Chroma

Circuit

IC400

Display

Control

Driver

IC802

CCD

DIGITAL PCB

Camera PCB

DIGITAL (Serial I/O)

Digital PCB is composed Microprocessor (IC600), D RAM (IC601), Flash Memory (IC602),

Gate Array (IC700), and V RAM (IC701).

Microprocessor controls the CCD, D RAM, Flash Memory and key operation. Gate array

compresses data for the color and the luminance from the CCD to increase the number of

memory, and up to 96 images can be stored in flash memory. The color and the luminance

data are mixed in the gate array to make the video signal.

As to spare parts for digital PCB, Casio supplies PCB ass'y and the individual parts.

IC801

IC800 Processor

D/A

2IC700 Gate Array

V RAM

1IC600 Microprocessor

Control

Timing V RAM

Control

Encoder

VIDEO OUTPUT

(Video I/O)

Amp.

Data

Compre-

ssor

3IC701

4IC602

— 6 —

1CPU (IC600)

Controls the CCD, D RAM, Flash memory and key operation.

PROM/MASKROM1 RAM1

CPU

Interrupt

controller User break

controller Direct state controller

Direct memory

access

controller

Serial communication

interface (x2channel) 16-bit integrated

timer pulse unit

Programmable timing

pattern controller A/D

converter Timer

Port B

Port A Address

Port C

A15 ~ A0

AD15 ~ AD0

CS3 ~ CS0, A21 ~ A16PA15 ~ PA0

PC7 ~ PC0 PB0 ~ PB15

Reset,

MD2 ~

MD0,

EXTAL,

XTAL

Address bus 24-bit

Data bus 16-bit

Address bus 24-bit

High-order 8-bit

Low-order 8-bit

Address Data/Address

— 7 —

CPU PIN FUNCTION

Pin No. Terminal Name IN/OUT Function

1 PB14 OUT Timing pattern output.

2 PB15 - Not used.

3 VSS IN Ground terminal.

4 - 11 AD0 - AD7 IN/OUT Address bus.

12 VSS IN Ground terminal.

13 - 14 AD8 - AD9 - Not used.

15 VCC IN Power source.

16 - 21 AD10 - AD15 - Not used.

22 VSS IN Ground terminal.

23 - 30 A0 - A7 OUT Address bus.

31 VSS IN Ground terminal.

32 - 33 A8, A9 OUT Address bus.

34 - 39 A10 - A15 - Not used.

40 VSS IN Ground terminal.

41, 42 A16, A17 - Not used.

43 VCC IN Power source.

44 - 47 A18 - A21 - Not used.

48 - 50 CS0 - CS2 - Not used.

51 CASL OUT CAS(Column Address Strobe) signal for D RAM.

52 VSS IN Ground terminal.

53 PAO - Not used.

54 RAS OUT RAS(Row Address Strobe) signal for D RAM.

55 CS6 OUT Chip select signal.

56 WAIT - Not used.

57 WR OUT Write enable signal for outer memory (low-order 8-bit).

58 PA5 OUT Write enable signal for outer memory (high-order 8-bit).

59 RD OUT Read enable signal for outer memory.

60 PA7 - Not used.

61 VSS IN Ground terminal.

62 PA8 IN Bus request signal.

63 PA9 OUT Interrupt request signal.

64 - 66 PA10 - PA12 - Not used.

67 DREQ0 IN Interrupt request signal.

68 IRQ2 IN Interrupt request signal.

69 PA15 IN Interrupt request signal.

70 VCC IN Power source.

71 CK OUT System clock pulse.

72 VSS IN Ground terminal.

73 EXTAL IN Clock pulse input.

74 XTAL - Not used.

75 - 77 VCC, NMI, VPP IN Power source.

78 WDTOVF - Not used.

79 RES IN Reset signal input.

80 MD0 IN Ground terminal.

81 MD1 IN Connected to VCC3.

82 MD2 IN Connected to ground.

83, 84 VCC IN Power source.

— 8 —

Pin No. Terminal Name IN/OUT Function

85, 86 AVCC, AVREF IN Connected to VCC3.

87 - 89 PC0 - PC2 IN Key input terminal.

90 PC3 IN Low battery detection terminal.

91 AVSS IN Ground terminal.

92 - 95 PC4 - PC7 - Not used.

96 VSS IN Power source.

97, 98 PB0, PB1 IN/OUT Port B.

99 VCC IN Power source.

100 - 105 PB2 - PB7 IN/OUT Port B.

106 VSS IN Ground terminal.

107 RXDO IN Data input terminal from a personal computer.

108 TXDO OUT Data output terminal to a personal computer.

109, 110 PB10, PB11 IN/OUT Port B.

111 PB12 - Not used.

112 PB13 - Not used.

Data Compressor

The color difference and the luminance data is compressed about 1/7 to increase the

numer of images in memory. Up to 96 images can be stored.

Y (luminance siganal) data : 480 x 224 byte

Cb (color difference signal B-Y) data : 160 x 112 byte 21,120 byte

Cr (color difference signal R-Y) data : 160 x 112 byte 1/7

Total: 143,360 byte 21,120 byte

Control

Timing

Data

Compressor

V RAM

Control

Encoder

D/A

V RAM

Encoder

The color and the luminance data are mixed internally to make the video signal, and

send it to the linear PCB and the video out terminal.

2Gate Array (IC700)

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