Casio QV-300 (B) Troubleshooting guide

QV-300 (B)(KX-727B)

NOV. 1996

(without price)

(For NTSC)

CONTENTS

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

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

FLOW DIAGRAMS ........................................................................................ 3

POWER SUPPLY CIRCUIT OPERATION.....................................................5

TROUBLESHOOTING ................................................................................... 8

DISASSEMBLY.............................................................................................. 9

ASSEMBLY.................................................................................................. 11

PRINTED CIRCUIT BOARDS...................................................................... 13

EXPLODED VIEW........................................................................................ 15

PARTS LIST................................................................................................. 16

SCHEMATIC DIAGRAMS............................................................................ 23

WAVEFORMS.............................................................................................. 27

— 1 —

SPECIFICATIONS

Item Specification

1. Recording System Digital (JPEG based)

2. Signal System NTSC

3. Recording Medium Built-in 32-Mbit flash memory

4. Number of Memory Pages FINE(VGA) : 64 (approximately 480-kbit compressed)

NORMAL(Quarter-VGA) : 192 (approximately 160-kbit compressed)

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

6. Imaging Device 1/4-inch CCD (Total Number of Pixels: 360,000)

7. Lens 2 focal points with macro position: F2.6 f=4.9 mm/f=11.0 mm

8. Aperture F2.6/F8 manual switching

9. Focal Length f=4.9 mm F2.6/NORMAL : 0.6 m (2') ~ ∞;

f=4.9 mm F2.6/MACRO : 9 cm (3.5") ~ 11 cm (4.3")

f=4.9 mm F8/NORMAL : 0.3 m (1') ~ ∞;

f=4.9 mm F8/MACRO : 7 cm (2.8") ~ 14 cm (5.5")

f=11.0 mm F2.6/NORMAL : 3.4 m (11.2') ~ ∞;

f=11.0 mm F2.6/MACRO : 52 cm (1.7') ~ 62 cm (2')

f=11.0 mm F8/NORMAL : 1.7 m (5.6') ~ ∞;

f=11.0 mm F8/MACRO : 44 cm (1.4') ~ 77 cm (2.5')

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. Resolution FINE, NORMAL

19. Monitor 61,380-pixel 2.5-inch TFT low-glare color LCD: doubles as finder

20. PC Output Image 480 × 640 dots (FINE)

240 × 320 dots (NORMAL)

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

22. Power Supply Batteries (AA-size Alkaline or Lithium batteries ×4)/AC Adaptor

23. Battery Life LR6 (AM3) AA-size alkaline batteries

Approximately 130 minutes continuous operation (Play mode)

Recording for about 96 images (one image per minute)

FR6 AA-size lithium batteries

Approximately 220 minutes continuous operation (Play mode)

Recording for about 180 images (one image per minute)

24. Dimensions 72 (H) ×162 (W) ×49 (D) mm/

2.8" (H) ×6.4" (W) ×1.9" (D)

25. Weight Approximately 250 g / 8.8 oz (excluding batteries)

26. Accessories Wrist strap; soft case; video cable; cleaning cloth

— 2 —

BLOCK DIAGRAM

CCD

Camera Unit

IC700

HG51D291FE

Digital PCB

IC703

LC99092-Z03

8 bit to 16 bit

converter

Color processor

IC602

KM29V32000T

32Mbit

Flash memory

IC601

HM51W4260

4Mbit DRAM

IC701

µPD482445LGW

4Mbit VRAM

IC702

µPD6461GS

On screen

display

VRAM

contoroller Video

encoder

D/A

converter

ROM

RAM

Direct

memory

access

controller

Bus

state

controller

Serial

communication

interface

IC600

HD6437042Y03F

Data

compressor

expander

Video out

Key PCB

A/D

converter

Lens

Digital I/O

IC300

IR3P90Y1

Chroma circuit

IC400

MSM6770CGS

Display controller

Linear PCB

Power

supply

Power

supply

AC Adaptor

Battery

Back

light LCD

CPU

I/O

port

— 3 —

FLOW DIAGRAMS

REC mode

1Exposure and Analog to Digital conversion by Camera unit

28 to 16 bits conversion by IC703

3Storage for work

4Color processing by IC703: Ye,Cy, Gr →Y, By, Ry

5Storage for work

6, 7Video encode by IC 700 and IC701: Y, By, Ry →Video

8Video out

When pressing the shutter button

Camera Unit

IC703

LC99092-Z03 IC700

HG51D291FE

IC701

µPD482445LGW

IC602

KM29V32000T

IC601

HM51W4260

IC600

HD6437042Y03F

Digital PCB

CCD A/D

Converter

IC703

LC99092-Z03 IC700

HG51D291FE

IC701

µPD482445LGW

IC602

KM29V32000T

IC601

HM51W4260

IC600

HD6437042Y03F

Digital PCB

Camera Unit

CCD A/D

Converter

— 4 —

1Reading from Flash memory and storage for work

2Expansion by IC700

3Storage for work

4, 5. Video encode by IC 700 and IC701: Y, By, Ry →Video

6Video out

1Exposure and Analog to Digital conversion by Camera unit

28 to 16 bits conversion by IC703

3Storage for work

4Color processing by IC703: Ye, Cy, Gr →Y, By, Ry

5Storage for work

6Compression by IC700

7Storage for work

8Storage to Flash memory

PLAY mode

IC703

LC99092-Z03 IC700

HG51D291FE

IC701

µPD482445LGW

IC602

KM29V32000T

IC601

HM51W4260

IC600

HD6437042Y03F

Digital PCB

Camera Unit

CCD A/D

Converter

— 5 —

VCC1

IC505

VCC1

R515

Q514

C523

VCC3-1

KEY0

KEY2

PON

KEY1

VCC3-1

GND

CN601

FU500 R516 IC507

C548

R511

C254

R514

C521

R517

R510

R512 Q503

R513 Q513

R509

Q512

C520

C531

OUT

VDD

GND

VCC

CLR

OUT

VCC

GND

INA

INB

1PON from

Key PCB

2APO from Pin 42

of IC600

6Voltage detection signal

3POB to Pin102

of IC600

4FACT from

Pin 36 of IC600

5Power ON to Pin 3 of Q505

POWER SUPPLY CIRCUIT OPERATION

Signal

PON

APO

POB

FACT

Power On

Voltage

detection

Operation

Power on/off signal (pulse) from SW900 on Key PCB

Auto power off signal (pulse) from pin 42 of IC600

Power on/off recognition signal to pin 102 of IC600

ON: H (VCC3) OFF: L (GND)

Forced power on signal from pin 36 of IC600

Forced ON: H (VCC3) OFF: L (GND)

ex. While writing to flash memory

Power on/off signal to pin 3 of Q505

ON: H (VCC1) OFF: L (GND)

Normal: H

Low voltage: L

— 6 —

Power on

1. PON

2. APO

3. POB

4. FACT

5. Power On

6. Voltage

detection

Power off

1. PON

2. APO

3. POB

4. FACT

5. Power On

6. Voltage

detection

H (VCC1)

H (VCC3)

H (VCC1)

H (VCC0)

H (VCC1)

H (VCC3)

H (VCC1)

H (VCC0)

CLR

Operation

NAND gate

Flip-flop

Voltage detector

IC505

IC506

IC507

Pin 1 (OUT)

Pin 2 (VDD)

> 3.2 V

< 3.2 V

Time Chart

— 7 —

Power off by APO

1. PON

2. APO

3. POB

4. FACT

5. Power On

6. Voltage

detection

Power off by low voltage detection

1. PON

2. APO

3. POB

4. FACT

5. Power On

6. Voltage

detection

H (VCC1)

H (VCC3)

H (VCC1)

H (VCC0)

H (VCC1)

H (VCC3)

H (VCC1)

H (VCC0)

Forced power on by FACT

1. PON

2. APO

3. POB

4. FACT

5. Power On

6. Voltage

detection

H (VCC1)

H (VCC3)

H (VCC1)

H (VCC0)

— 8 —

TROUBLESHOOTING

No Display

1. Check the fuse (FU500) on the digital PCB.

2. Check the fuse (FU100) on the linear PCB.

3. Check the jack (JK500) on the digital PCB.

4. Check the power switch (SW900) on the key PCB.

5. Check the flat cable between the digital and linear PCBs.

6. Check the back light.

7. Check the LCD.

No Display at Record Mode

1. Check the camera unit.

Defect of the Camera Unit

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

required when the individual parts of the camera unit are replaced, and it can be done only at our factory.

(Except for replacing the outer case of the camera unit)

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