CASIO QV10C Service Manual

QV-10C(KX-720C)

JUL. 1995

(with price)

R

CONTENTS

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

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

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

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

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

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

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

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

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

REPAIR METHOD ....................................................................................... 32

PARTS LIST FOR ACCESSORIES............................................................. 33

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

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

SPECIFICATIONS

Item Specification

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

2. Signal System PAL

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 = 5.2 mm

8. Aperture F2/F8 manual switching

9. Focal Length F2/NORMAL : 60 cm to 310 cm;
F2/MACRO : 13 cm to 16 cm
F8/NORMAL : 28 cm to y;
F8/MACRO : 10 cm to 24 cm
(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 6 V

20. Power Supply Batteries (AA-size Alkaline batteries X 4) / AC Adaptor (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 adaptor (AD-C60)
Alkaline batteries (LR6 X 4); cleaning cloth; owner's manual;
personal computer connection kit

— 1 —

BLOCK DIAGRAM

11

11

Camera PCB 2222 Digital PCB

Gate Array

CCD

Flash
Memory
TC5816FT-1

D RAM
HM514B00
ALJ8

Power
SupplyCircuit

HG51B167FB

V RAM
µPD482234LE

CPU
HD6477034F20

33

33

Linear PCB

IC300
IR3P96

IC400MSM67
70GS

55

55

VIDEO OUT (Video I/O)

66

66

DIGITAL (Serial I/O)

44

44

LCD

LCD

DC IN (6V)

AC adaptor
Battery x 4

1 Camera Unit: It is used to provide color information.
2 Digital PCB: It controls the CCD, compressed data, stores image in memory.
3 Linear PCB: It generates the tricolor and controls the LCD display.
4 LCD: 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.

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

Key

Key PCB

— 2 —

CIRCUIT OPERATIONS

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.

1 Lens

2 Color

Filter

1 Lens

Concentrates light rays to a point.

2 Color 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.

Camera PCB

3 IC802 (CCD)

Ye,Cy,Gr
color signal D0 ~ D7

CCD IN

PHI1~PHI4
PHS1~PHS4

IC800
Driver

VI1~ VI4
VS1 ~ VS4

4 IC801

Sample Hold,
AGC

Timing
Generator

8bit A/D
Converter

MCK,
HRS2,
FTTRG,
STTRG,
CCODE,
ENDFLG

Digital PCB

Data Bus

D RAM

CPU

1 2 3 ~ 506 507 508

Ye G Cy Ye G Cy
Ye G Cy Ye G Cy
Ye G Cy Ye G Cy

Ye G Cy Ye G Cy
Ye G Cy Ye G Cy

Array of color filter

— 3 —

Red

Ye

Green

Cy=Blue+Green

White

Cy

Mg

Blue

Three Primary colors

Mg=Blue+RedYe=Red+Green

3 CCD (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.

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.

3
4

5
6

PHI4
PHI3
PHI2

PHI1

532(H)

508(H)

Image pickup

492(V)

500(V)

PHIH1 ~ PHIH2:

Clock pulse for the horizontal shift

PHIR 7

VDD 8

Vout 9

Output

Amp.

VGG

VOG

Storage

Horizontal shift
register (CCD)

PHIH2

PHIS4
PHIS1
PHIS2
PHIS3

PHIH1

19
18

17
16

register.

PHIR:

CCD analog signal output.

12 13

14 15

4 Camera Signal Processor (IC801)

Sample Hold,

From CCD

to CCD

AGC

Timing
Generator

Sample Hold

Selects a desired signal from the CCD.

Timing Genarator

Generates the clock pulse for the CCD.

8bit A/D
Converter

D0~D7

From/to CPU

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.

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. .

— 4 —

DIGITAL PCB

Camera PCB

IC802
CCD

IC800

Driver

DIGITAL PCB

+5V

+18V

6

Power Supply

IC801

4 IC602

16M Flash Memory

5 IC601

-10V

Processor

4M D RAM

2 IC700 Gate Array

Control
Timing

Data
Compre­ssor

V RAM
Control

Encoder

1 IC600 Microprocessor

ROM

CPU

I/O Port

SCI, Timmer

D/A

RAM

DMAC

BSC

3 IC701

1M
V RAM

Amp.

Linear
PCB

IC300
Chroma
Circuit

IC400
Display

Control

VIDEO OUTPUT
(Video I/O)

TFT LCD

DIGITAL (Serial I/O)

DC in +6V

Key Input

Battery

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.

— 5 —

1 CPU (IC600)

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

Port A Address

CS3 ~ CS0, A21 ~ A16PA15 ~ PA0

Reset,
MD2 ~
MD0,
EXTAL,
XTAL

CK

PROM/MASKROM1

CPU

Interrupt
controller

User break
controller

Serial communication
interface (x2channel)

RAM1

Direct memory
access
controller

Direct state controller

16-bit integrated
timer pulse unit

Address

Address

A15 ~ A0

Data/Address

Programmable timing
pattern controller

Port C

A/D
converter

Port B

Timer

PC7 ~ PC0 PB0 ~ PB15

Address bus 24-bit

Address bus 24-bit

High-order 8-bit

Data bus 16-bit

— 6 —

Low-order 8-bit

AD15 ~ AD0

Data / Address

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 R D 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.

6 7 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.

8 2 MD2 IN Connected to ground.

— 7 —

Pin No. Terminal Name IN/OUT Function

83, 84 VCC IN Power source.
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.

9 6 V SS IN Power source.

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

9 9 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.

2 Gate Array (IC700)

Control
Timing

V RAM
Control

V RAM

Encoder

Data
Compressor

D/A

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

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.

— 8 —

)

3 V RAM

It is used for encoder function.

4 Flash Memory

Up to 96 images can be stored in memory. Flash memory does not require electrical power to store data,
so image data is retained in memory even when you turn camera power off.
If batteries go dead, simply load a set of new batteries or connect the AC adaptor and you will be able to
view images in camera memory.

Memory Map

Header

record

5 D RAM

There is area of work space that the microprocessor uses for storing temporary data , the intermediate
results of calculations, and all sorts of pieces of information that the system needs to remember.

6 Power Supply

Terminal Voltage Purpose

VCC3-0 4.75 ~ 5.15 (V) Logic circuit
VCC3-1 4.70 ~ 5.15 (V) Video output
VCC3-2 4.60 ~ 5.15 (V) Digital I/O

VCC6 17.80 ~ 18.20 (V) CCD
VEE3 -9.6 ~ -10.6 (V) CCD

Image data

Max; 96 images

Color

Information

KEY PCB

Block Diagram

CPU

87 pin
88 pin

VCC3-1

BUTTON RESISTOR

KEY 0
KEY 1

Key Matrix

VOLTAGE BUTTON RESISTOR KEY MATRIX CPU

KEY 2

89 pin

VCC3-1 Shutter R900 (1.8 K) KEY0 87pin
VCC3-1 [+] R901 (15 K) KEY0 87pin
VCC3-1 MODE R902 (1.8 K) KEY1 88pin
VCC3-1 DISP R903 (4.7 K) KEY1 88pin
VCC3-1 ZOOM R904 (10 K) KEY1 88pin
VCC3-1 SELF R905 (27 K) KEY1 88pin
VCC3-1 [-] R906 (1.8 K) KEY2 89pin
VCC3-1 DEL R907 (15 K

— 9 —

KEY2 89pin

)

y

LINEAR PCB

IC300 generates the tricolor (red, green and blue) from the video signal, and IC400 controls the TFT-LCD
display.

Power Supply

Terminal Voltage Purpose

VCC2 4.3 ~ 4.7 (V) Logic crcuit
VCC4 9.5 ~ 11.0 (V) Display
VEE2 -7.0 ~ -8.0 (V) Display
VEE4 -16.5 ~ -17.9 (V

IC300

Displa

VIDEO

9

F ADJ

11

ACC.F

BURST

-OUT
APC.F

Killer.F

VCO

HD

8

19

30
27

29

26

APL

H.F.OUT

17 14 18 21 22 23 15 10 16 13 12 28 38 35 37 39

H filter

Trap D.L

ACC

ACC DET

APC Killer

F/F

PAL SWVCO

TRAP

SYNC-SEP

SYNC-OUT

SYNC SEP

BPF

Demo­dulation

SYNC-IN

BGP GEN

CLAMP

Color control

L
P
F

TIME-CONST

COLOR

CLAMP

Picture
quality
ADJ.

Matrix
Contrast

AGC.FIL

AGC DET

AGC AMP

INT/EXT
SW

PICTURE

AGC OUT

Vref

γ corrector

R-OUT

DCDET

INV

γ corrector

R Gain

B Gain

G-OUT

INV INV

γ corrector

Clamp
Bright

COM DRIV

B-OUT

SWP GEN

44

43

48

41

31

40

B-SUB­BRI

RGB.
AMP

B-SUB­BRI

46

γ 2

47

γ 1

Peek
Limitter

FRP1
42

FRP2
COM.

AMP

6 7 36 32 33 25 24 5 1 20 4 3 2 51 50 44 45 34

VEE

VCC1

GND

VCC2

VEE

R-V

B-V

IDENT.F

— 10 —

CONT

EXT-R

CHROMA-OUT

EXT-B

EXT-G

SW

R-SUB-CONT

BRIGHT

B-SUB-CONT

COM.OUT