CASIO QV10C Service Manual

(with price)

QV-10C(KX-720C)

JUL. 1995

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

1 Camera PCB		2 Digital PCB
					V RAM
			Gate Array
CCD					µPD482234LE
			HG51B167FB

Flash

Memory

TC5816FT-1

D RAM

HM514B00

ALJ8

CPU

HD6477034F20

Power

SupplyCircuit

		DC IN (6V)					Key
		AC adaptor
							Key PCB
		Battery x 4

3 Linear PCB

4 LCD

IC300

IR3P96

LCD

IC400MSM67

70GS

5 VIDEO OUT (Video I/O)

6DIGITAL (Serial I/O)

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.

— 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

Camera PCB

Digital PCB

	4 IC801		Data Bus
3 IC802 (CCD)
Ye,Cy,Gr
color signal	Sample Hold,	8bit A/D	D0 ~ D7
CCD IN	AGC	Converter	D RAM
PHI1~PHI4
PHS1~PHS4
IC800
Driver
VI1~ VI4	Timing		CPU
	Generator		MCK,
VS1 ~ VS4			HRS2,
			FTTRG,
			STTRG,
			CCODE,
			ENDFLG

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.

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

Red

Ye=Red+Green

Mg=Blue+Red

Ye Mg

White

Cy

Green Blue

Cy=Blue+Green

Array of color filter

Three Primary colors

— 3 —

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.

							Effective picture element:
			532(H)				249,936 = 508 (H) x 492 (V)
			508(H)				PHIS1 ~ PHIS4:
	PHI4
3							Clock pulse for the storage.
	PHI3
4	PHI1		Image pickup		500(V) 492(V)		Clock pulse for the image pickup.
6
5	PHI2						PHI1 ~ PHI4:
							PHIH1 ~ PHIH2:
					PHIS4		Clock pulse for the horizontal shift
						19	register.
PHIR 7			Storage		PHIS1	18	PHIR:
					PHIS2	17
					PHIS3	16	CCD analog signal output.
VDD 8	.Amp	Output	Horizontal shift
Vout 9
			register (CCD)
	VGG	VOG	PHIH2	PHIH1
	12	13	14	15

4 Camera Signal Processor (IC801)
				D0 ~ D7:
	Sample Hold,	8bit A/D	D0~D7	Digital signal of the luminance and the
				color difference B-Y and R-Y signal.
From CCD	AGC	Converter
				CCD IN:
				CCD analog signal input.
				VI1 ~ VI4/VS1 ~ VS4:
	Timing			Clock pulse for the CCD control sig-
				nal.
to CCD	Generator		From/to CPU
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. .

— 4 —

DIGITAL PCB

Camera PCB

IC802		IC801	2IC700 Gate Array
CCD
				3IC701
	IC800	Processor	Control	V RAM
			Timing	Control
	Driver			1M
				V RAM
				Encoder

4IC602

Data

Compre-

Amp.

16M Flash Memory

ssor

D/A

DIGITAL PCB

1IC600 Microprocessor

ROM

RAM

Linear

PCB

DMAC

5IC601

IC300

4M D RAM

Chroma

+5V +18V -10V

CPU

BSC

Circuit

IC400

6

SCI, Timmer

Display

Power Supply

I/O Port

Control

DC in +6V

Key Input

Battery

VIDEO OUTPUT

(Video I/O)

TFT LCD

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.

— 5 —

1CPU (IC600)

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

	PA15 ~ PA0			CS3 ~ CS0, A21 ~ A16
	Port A			Address
Reset,	PROM/MASKROM1			RAM1
MD2 ~
MD0,
EXTAL,					AddressAddress
XTAL
CK				Direct memory
	CPU
				access
				controller
	Interrupt	User break	Direct state controller
	controller	controller
	Serial communication		16-bit integrated
	interface (x2channel)		timer pulse unit		Data/Address
			converter		Address
	Programmable timing		A/D	Timer
	pattern controller				/
					Data
	Port C			Port B

A15 ~ A0

AD15 ~ AD0

PC7 ~ PC0			PB0 ~ PB15
	Address bus 24-bit		Address bus 24-bit
	Data bus 16-bit		High-order 8-bit
			Low-order 8-bit

— 6 —

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.

— 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.

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.

2 Gate Array (IC700)

Control

V RAM

Control

Timing

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 —

3V RAM

It is used for encoder function.

4Flash 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	Image data	Color
record	Max; 96 images	Information

5D 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

KEY PCB

Block Diagram

BUTTON RESISTOR

CPU

KEY 0

87 pin

VCC3-1

KEY 1

88 pin

Key Matrix

KEY 2

89 pin

V O L T A G E

B U T T O N

R E S I S T O R

KEY MATRIX

C P U

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)

KEY2

89pin

— 9 —

LINEAR PCB

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

Power Supply

Terminal	V o l t a g e			P u r p o s e
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)		Display

IC300

H.F.OUT

TRAP

SYNC-SEP

SYNC-OUT

SYNC-IN

TIME-CONST

CLAMP

COLOR

APL

AGC.FIL

AGC OUT

PICTURE

DCDET

R-OUT

G-OUT

B-OUT

17

14

18

21

22

23

15

10

16

13

12

28

38

35

37

39

Vref

40

B-SUB-

BRI

SYNC SEP

BGP GEN

AGC DET

H filter

RGB.

VIDEO

Trap

D.L

CLAMP

AGC AMP

44

AMP

9

B-SUB-

F ADJ

INV

INV

INV

43 BRI

11

46

ACC

BPF

Color control

γ corrector

γ 2

47

ACC.F

8

Picture

γ corrector

γ 1

ACC DET

quality

BURST

19

γ corrector

ADJ.

-OUT

48

Peek

APC.F

30

APC

Killer

SWP GEN

Limitter

Killer.F

27

L

FRP1

Demo-

Matrix

INT/EXT

R Gain

Clamp

41

P

42

Contrast

SW

dulation

F

Bright

FRP2

VCO

VCO

PAL SW

B Gain

29

31

COM.

HD

F/F

AMP

COM DRIV

26

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

CONT

CHROMA-OUT

EXT-R

EXT-G

EXT-B

SW

R-SUB-CONT

B-SUB-CONT

BRIGHT

COM.OUT

— 10 —