CASIO QV30B Service Manual

(without price)

QV-30 (B) (KX-724B)

(For NTSC)

APR. 1996

R

CONTENTS

SPECIFICATIONS .........................................................................................	1
BLOCK DIAGRAM ........................................................................................	2
CIRCUIT OPERATIONS ................................................................................	3
COLOR ADJUSTMENT ...............................................................................	13
ADJUSTMENT .............................................................................................	15
TROUBLESHOOTING .................................................................................	18
DISASSEMBLY ...........................................................................................	19
ASSEMBLY .................................................................................................	21
PRINTED CIRCUIT BOARDS .....................................................................	23
EXPLODED VIEW .......................................................................................	25
PARTS LIST ................................................................................................	26
SCHEMATIC DIAGRAMS ...........................................................................	35
WAVEFORMS..............................................................................................	39

	SPECIFICATIONS
Item		Specification
1. Recording System		Digital (JPEG based)/Field recording
2. Video 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		2 focal points with macro position: F2.8 f=4.0 mm/f=9.0 mm
8. Aperture		F2.8/F8 manual switching
9. Focal Length		f=4.0 mm F2.8/NORMAL	: 50 cm ~ y
		f=4.0 mm F2.8/MACRO	: 10 cm ~ 13 cm
		f=4.0 mm F8/NORMAL	: 24 cm ~ y;
		f=4.0 mm F8/MACRO	: 8 cm ~ 19 cm
		f=9.0 mm F2.8/NORMAL	: 250 cm ~ y
		f=9.0 mm F2.8/MACRO	: 50 cm ~ 65 cm
		f=9.0 mm F8/NORMAL	: 120 cm ~ y;
		f=9.0 mm F8/MACRO	: 40 cm ~ 95 cm
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		-2 EV to +2 EV
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 2.5-inch TFT low-glare color LCD
19. Terminals		DIGITAL; VIDEO OUT; DC IN 6 V
20. Power Supply		Batteries (AA-size Alkaline batteries × 4)/AC Adaptor
21. Battery Life		Approximately 120 minutes (Playback mode)
22. Dimensions		72 (H) × 162 (W) × 49 (D) mm/
		2.8" (H) × 6.4" (W) × 1.9" (D)
23. Weight		Approximately 240 g / 8.5 oz (excluding batteries)
24. Accessories		Wirst strap; soft case; special video cable;
		Alkaline batteries (LR6 × 4); cleaning cloth

— 1 —

BLOCK DIAGRAM

1 Camera PCB 2 Digital PCB
					V RAM
CCD			Gate Array		HM53812BJ8
			HG51B167FB

Flash

Memory

TC5816FT-1

(KM29N16000T)

D RAM

HM514B00

ALJ8

CPU

CPU

HD6477034F16

HD6437034F16

Power Supply

Circuit

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

3 Linear PCB

IC300

IR3P90Y

LCD

IC400

MSM6770GS

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.

6DIGITAL (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

11Lens Concentrateslightlightraysraysto atopointa point. .

22Colorfilter TheThestripedstripedcolorcolorfilterfilterin frontin frontof theof theCCDCCDdetectectoris uisedusedto provideto providecolorcolorinformationinformation. . It hasIt hasthreethreecolors,colors,yellow,yellow,greengreenandandcyancyan. .

ArrayArrayof colorof colorfilterfilterandandsignalsignalprocessingprocessing(IC801)(IC801)for forcameracameraareareextrememelyclosecloserelationshiprelationship. .

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 —

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.

			532(H)
			508(H)
3	PHI4
	PHI3
4	PHI2		Image pickup		500(V) 492(V)
5
6	PHI1
					PHIS4	19
PHIR 7			Storage		PHIS1	18
					PHIS2	17
					PHIS3	16
VDD 8	.Amp	Output	Horizontal shift
Vout 9
			register (CCD)
			PHIH2	PHIH1
	VGG	VOG
	12	13	14	15

4 Camera Signal Processor (IC801)

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 register.

PHIR:

CCD analog signal output.

	Sample Hold,	8bit A/D	D0~D7
From CCD	AGC	Converter
	Timing
to CCD	Generator		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.

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)

1Controls the CCD, D RAM, Flash memory and key operation. CPU (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,					Address
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
	Programmable timing		A/D	Timer
	pattern controller		converter
	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.
83, 84	VCC	IN	Power source.

— 7 —

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.

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 —

3 V RAM

3It VisRAMused for encoder function. It is used for encoder function.

4 Flash Memory

4 Flash Memory

Up to 96 images can be stored in memory. Flash memory does not require electrical power

Up to 96 images can be stored in memory. Flash memory does not require electrical power to store to store data, so image data is retained in memory even when you turn camera power off.

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

If batteries go dead, simply load a set of new batteries or connect the AC adaptor and you will be able

will be able to view images in camera memory. to view images in camera memory.

Memory Map

Header	Image data	Color
record	Max; 96 images	Information

5 D RAM

There is area of work space that the microprocessor uses for storing temporary data , the

5 D RAM

intermediate results of calculations, and all sorts of pieces of information that the system

There is area of work space that the microprocessor uses folr storing temporary data, the intermediate

needs to remember.

results of calculations, and all sorts of pieces of information that the system needs to remember.

6 Power Supply

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 2

89 pin

Key Matrix

VOLTAGE

BUTTON

RESISTOR

KEY MATRIX

CPU

VCC3-1

Shutter

R900(1.8K)

KEY0

87pin

VCC3-1

[+]

R901(15K)

KEY0

87pin

VCC3-1

MODE

R902(1.8K)

KEY1

88pin

VCC3-1

DISP

R903(4.7K)

KEY1

88pin

VCC3-1

ZOOM

R904(10K)

KEY1

88pin

VCC3-1

SELF

R905(27K)

KEY1

88pin

VCC3-1

[-]

R906(1.8K)

KEY2

89pin

VCC3-1

DEL

R907(15K)

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

IC300

SYNC-SEP

SYNC-OUT

TIME-CONST

H.F.OUT

TRAP

SYNC-IN

CLAMP

COLOR

APL

AGC.FIL AGC OUT PICTURE

DCDET

R-OUT

G-OUT

B-OUT

18

15

19

20

21

22

16 11

17

14 13 23

35

32

34

36

Vref

42

SYNC SEP

BGP GEN

AGC DET

H filter

RGB.

VIDEO

Trap

D.L

CLAMP

AGC AMP

38

AMP

10

F ADJ

INV

INV

INV

41

12

44

ACC

BPF

Color control

γ corrector

γ 2

45

ACC.F

Picture

γ corrector

γ 1

9

ACC DET

quality

γcorrector

APC.F

ADJ.

46

27

APC

Killer

SWP GEN

24

Killer.F

L

RGB.

26

VCO

Matrix

INT/EXT

R Gain

40

INV

P

Clamp

VCO

Demodulation

39

Contrast

SW

F

Bright

FRP

B Gain

TINT

28

VEE

VCC1 GND VCC2 VEE

COM.

COM DRIV

AMP

25

7

6

29

33

31

2

5 4

3 1

48

47

43

30

TINT

YEE

VCC1

GND

VCC2

VEE

CONT

EXT-R EXT-G

EXT-B SW

R-SUB-CONT

B-SUB-CONT

BRIGHT

COM.OUT

— 10 —