CASIO QV-780 Service Manual

QV-780

INDEX

(KX-776)

AUG. 1998

(without price)

Ver.1 Aug / 1999

CONTENTS

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

WIRING AND BLOCK DIAGRAM ..............................................................................................................2

POWER SUPPLY CIRCUIT OPERATION..................................................................................................3

ADJUSTMENT ...........................................................................................................................................4

1. Unit Adjustment ....................................................................................................................................4

1-1. Color parameters loading ............................................................................................................4

1-2. Scratch compensation .................................................................................................................5

1-3. Flash adjustment ..........................................................................................................................5

1-4. Flash check ...................................................................................................................................6

1-5. Current consumption ...................................................................................................................7

1-6. Clock reset ....................................................................................................................................7

1-7. Other test modes ..........................................................................................................................8

2. PCB K772-DA Adjustment....................................................................................................................8

2-1. VCC1, VCC3 voltage check..........................................................................................................9

2-2. VCC7, VEE3 adjustment...............................................................................................................9

2-3. Clock oscillation check................................................................................................................9

3. PCB K772-L Adjustment.....................................................................................................................10

3-1. VCC1 adjustment and VCC2, VCC6, VEE2, VCC0 voltage check...........................................11

3-2. VCO free run frequency adjustment ......................................................................................... 11

3-3. Backlight drive voltage adjustment ..........................................................................................12

3-4. VCOM AC adjustment and VCOM DC coarse adjustment ......................................................12

3-5. Brightness voltage setting and contrast adjustment..............................................................13

3-6. BCC ..............................................................................................................................................14

3-7. Color adjustment ........................................................................................................................15

3-8. VCOM DC adjustment.................................................................................................................15

DISASSEMBLY ........................................................................................................................................16

PRINTED CIRCUIT BOARDS ..................................................................................................................22

TROUBLESHOOTING .............................................................................................................................26

EXPLODED VIEW ....................................................................................................................................28

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

SCHEMETIC DIAGRAMS ........................................................................................................................36

SPECIFICATIONS

Item Specification

Recording System Digital (JPEG base) Signal System PAL Recording Medium Memory card (2MB card included) Memory Capacity FINE: 14 images (Minimum) (133KB compressed)

(2MB Card)/ NORMAL: 26 images (Minimum) (70KB compressed) Computer Output image ECONOMY: 47 images (Minimum) (38KB compressed)

Recording Modes Single-image; Movie; Repeat; Panorama; Timer; Interval timer; Self-timer Image Element 1/4-inch CCD (350,000 pixels) Lens Fixed focal point with macro position; F2, f = 3.94mm Aperture F2, F8 switching/fixed Focus Range NORMAL: 0.7m to ∞

MACRO: 14cm to 16cm (From surface of protective lens.) Light Metering TTL center priority by CCD Exposure Metering Program AE Exposure Range EV +5 to 18 Exposure Correction –2EV to +2EV (1/4EV units) Shutter CCD electronic shutter Shutter Speed 1/8 to 1/4000 second White Balance Automatic, WB1, WB2, WB3 Self-timer 2, 10 seconds Flash Modes AUTO, ON, OFF Resolution Modes FINE, NORMAL, ECONOMY Monitor 2.5-inch TFT low-glare color LCD; 84,480 pixels Computer Output image 640 x 480 pixels Input/Output Terminals Clock January 1, 1998 00:00:00 to December 31, 2049 11:59:59 (Auto Calendar) Power Supply Battery Life This camera can be power using AA-size alkaline, lithium or Ni-MH batter-

Dimensions 147(W) x 69(H) x 50(D) mm / 5.8”(W) x 2.7”(H) x 2.0”(D) Weight Approximately 290g (excluding batteries) Accessories Memory card; wrist strap; soft case; video cable; four LR6 alkaline batteries;

DIGITAL OUT, VIDEO OUT, AC adaptor connector, memory card connector

Four batteries (AA-size alkaline, lithium or Ni-MH batteries)/AC adaptor (AD-C620)

ies. The battery life reference values given below indicate the amount of

time at standard temperature (25°C) until power automatically turns off due

to battery failure. They do not guarantee that batteries will perform the amount

of service indicated. Battery life is reduced by low temperatures and contin-

ued use.

Continuous Playback: Alkaline Batteries (LR6); Approx.180 minutes

Lithium Batteries (FR6); Approx. 290 minutes AA-size Ni-MH; Approx.170 minutes

Continuous Recording: Alkaline Batteries (LR6); Approx. 630 shots

Lithium Batteries (FR6); Approx. 1,200 shots AA-size Ni-MH; Approx. 780 minutes

•The above figures are approximations only.

•The above guidelines are based on the following battery types: Alkaline: MX1500 (AA) DURACELL ULTRA Lithium: Energizer Ni-MH (Nickel-Metal Hydride): CASIO NP-H3

•Battery life varies with brand. “Continuous Recording” is made without use of the camera’s flash.

Regardless of use of the camera’s flash, turning on and off the POWER Switch, as well as other operating conditions may affect the above values.

owner’s manual.

— 1 —

WIRING AND BLOCK DIAGRAM

Photo INT

Auto Iris Lens

Solenoid

CB-PCB

ICX098AK

15V

CCD

15V

-5.5V

Vdrv

CXD1267AN

3.5V

CXA2056Q

CDS+AGC

CXD2310R

ADC

3.5V

BR9040F

EEROM

T.G

3.3V

CXD2452R

20-pin

23-pin

8-pin

KEY-PCB

DA-PCB

60-pin

3.3V YUV

Processor

CXD3120R

3.3V

3.0V Switching

RS5C316A

RTC

UPD6466

OSD

MB91181

Detection Switch

3.3V MACO

3.2V

INTR

CFDET

Signal Generator

Video

RS232C

EDO_ DRAM

Flash Memory

3.3V

15.0V

-5.5V

5.0V

Battery Voltage

Voltage Controller

VIDEO RS232C

3.3V

AC Adaptor

6.0V

10-pin

3.0V

4.5V

18.0V

12.0V

-10.5V

Transformer

5-pin

Battery voltage

GND

Battery voltage

GND

7-pin

Strobe Ass'y

Comparator

Photo Sensor

Xenon Lamp

Battery Voltage

Voltage Controller

Detection Sw. (RSTW)

FUNC button

LED

Chroma

IR3Y18A

Display Controller

CM7013L2

4.5V

26-pin

LCD module

High Voltage

Generator

5-pin

CA-PCB

Motor Driver

IRISA/IRISB

Battery Voltage

L-PCB

3.3V

7-pin

3.3V

— 2 —

2 APO from Pin 202

of IC500

FU152 R590

C525

POWER SUPPLY CIRCUIT OPERATION

VCC1-1

Q580

IC584

OUT VDD GND

NC NC

2 3

VCC1-1

5 4

Q582

VCC1-1

IC586

VCC

GND

R585

IC582

1 2

6 Voltage detection signal

1 PON from

Key PCB

1 2

CN504 VCC3-1 PON KEY0 KEY1 KEY2 SHTTER GND GND

Signal

PON APO

Q588

C592

IC582

VCC

GND

IC588

R595

6 5 4

C590

R592

R593

1 2 3 4

VCC3-1

VCC1-1

R594

5 6 7 8

5 Power ON to Pin 1 of Q155

Operation

Power on/off signal (pulse) from Key PCB Auto power off signal (pulse) from pin 202 of IC500

876

CLR

VCC

CKDQ

123

VCC1-1

GND

R579

Q583

3 POB to Pin193

of IC500

4 FACT from

Pin 195 of IC500

POB

Power on/off recognition signal to pin 193 of IC500 ON: H (VCC3) OFF: L (GND)

FACT

Forced power on signal from pin 195 of IC500 Forced ON: H (VCC3) OFF: L (GND) ex. While writing to flash memory

Power On

Power on/off signal to pin 1 of Q155 ON: H (VCC1) OFF: L (GND)

Voltage

detection

Normal: H Low voltage: L

— 3 —

ADJUSTMENT

1. Unit Adjustment

Contents of the adjustment

(1) Color parameters loading (2) Scratch compensation (3) Flash adjustment (4) Flash function check (5) Current consumption check (6) Clock reset (7) Other test modes

Necessary equipments

(1) IBM PC/AT compatible computer (2) Computer link cable (3) Digital oscilloscope (4) Stabilized power supply (5) Ammeter

1-1. Color parameters loading

Perform the following procedures when you replaced Camera Unit. (1) Set the QV-780 in “PLAY” mode.

(2) Connect the camera and a computer with a link cable.

To RS-232C connector

Digital terminal

(3) Execute the following program on MS-DOS system.

PON776.EXE (for COM port 1)

(4) Loading is done successfully when computer monitor shows a message stating that loading is

completed.

When the loading is completed normally

When the loading is failed (example)

Note: After the loading, also perform the following Scratch compensation and Flash adjustment.

— 4 —

1-2. Scratch compensation

1 meter

Gray paper

“Scratch” is a black dot which appears dimly on a white screen. Three scratches are allowable on

350,000 pxels screen. Perform this adjustment after loading color parameters. (1) Set the QV-780 in “REC” mode. (2) Set the dial on “ ” (PANORAMA MODE). (3) While pressing down the SHUTTER and DEL buttons, turn the power on.

LCD screen indicates “TEST MODE”.

(4) While TEST MODE is indicated on the LCD, select the dial on .

Press “MENU” and “ ” buttons simultaneously. LCD indicates;

CLOCK RESET

STROBE ADJUST DEFECT CORRECT BATTERY CHECK

(5) Cover QV-780 lens so that the light does not go in the

camera.

(6) Using “+” or “–” buttons, select “DEFECT CORRECT” and

press the SHUTTER button to execute the program.

(7) Make sure that the small red square mark on LCD turns in

blue.

(8) Turn the POWER switch off.

As the compensation data is written in the EEPROM by the POWER switch operation, do not forget to turn it off using the switch.

1-3.Flash adjustment

Perform this adjustment when you replaced the flash unit or

after color parameter loading.

Preparation and condition;

• Adjustments previously described should be completed.

• Distance between flash cover and gray paper should be one meter.

• The adjustment must be done in a dark room.

• Use following gray paper for the testing. Notes: •Use lighter color surface of the paper.

• Gray paper should be larger than the shooting area.

Code No. Name Specification 1904 5411 Superior Seamless Paper No. 22 (1.75 x 2.7 m) 1904 5412 Superior Seamless Paper No. 22 (2.72 x 11 m)

Though these papers are available from Casio, large camera stores handle them.

— 5 —

(1) Set the QV-780 in “REC” mode. (2) Execute the test program.

• Set the dial on “ ” (PANORAMA MODE).

• While holding down the “SHUTTER” and “DELETE” buttons, turn the POWER on.

• While TEST MODE is indicated on the LCD, select the dial on .

Press “MENU” and “ ” buttons simultaneously. LCD indicates;

CLOCK RESET

STROBE ADJUST DEFECT CORRECT BATTERY CHECK

(4) Use “+” or “–” buttons to select “STROBE ADJUST” and press the SHUTTER button. (3) Shot a picture of the test paper.

(Flash indicator should be red before shooting.)

(5) Make sure that the flash icon turns from red to blue.

(If it does not turn into blue, IC531 might be faulty.)

(6) Turn the POWER switch off.

As the adjustment data is written in the EEPROM by the POWER switch operation, do not forget to turn it off using the switch.

1-4.Flash check

This test is to make sure that the flash circuit is not affected by undesirable electric noise. Perform this test whenever you changed wirings of the camera unit.

Conditions;

• Perform after the flash adjustment

• Use “ ” button to select Flash On.

• Apply 6.0 ± 0.1 [V] voltage on DC IN jack.

(1) Set the QV-780 in “REC” mode and press the shutter. (2) Using a digital oscilloscope, monitor flash trigger pulse.

Voltage

Ammeter

Put oscilloscope probe on Camera unit.

Regulator

DC6.0±0.1V

Digital oscilloscope TIME: 1.0¨ µsec/div VOLTS: 1V/div (AC)

Correct waveform

OK if this peak is shown

TIME: 1µsec/div VOLTS: 1V/difv

NG waveform

2nd positive peak is not shown.

— 6 —

TIME: 1µsec/div VOLTS: 1V/difv

(3) Set the QV-780 on “PLAY” mode and make sure that the picture taken is not too dark or too light. (4) After the shot, flash is charged automatically. Observing the ammeter, make sure that the charging

current is less than 1.2 [A].

If the following pictures are taken, it may be caused by faulty wirings.

Shrinken

To solve this problem, install the wires as shown below.

Strobe

white wire in front. The other four wires in the back.

Lens

Removable for correction

*Warning: Discharge capacitor before operat-

Note: Red wire and

ing in accordance with DISASSEMBLY proce-

Red wire

dure of page 19. There is a risk of electric shock.

1-5.Current consumption

Soldering

White wire

(1) Set the QV-780 in “REC” mode. After the flash circuit is fully charged, make sure that the current

consumption is less than 550 [mA] (for example, at PLAY mode, current consumption is 380 [mA] when the flash is fully charged.

(2) Reduce the power supply voltage to 3.8 [V] and make sure that the low battery warning indicator

is shown.

1-6.Clock reset

Perform the following procedures when you replaced PCB K772-DA. (1) Set the QV-780 in “REC” mode. (2) Execute the test program.

• Set the dial on “ ” (PANORAMA MODE).

• While holding down the “SHUTTER” and “DELETE” buttons, turn the POWER on.

• While TEST MODE is indicated on the LCD, select the dial on . Press “MENU” and “ ” buttons simultaneously.

LCD indicates;

CLOCK RESET

STROBE ADJUST DEFECT CORRECT BATTERY CHECK

— 7 —

(3) Using “+” or “–” buttons, select “CLOCK RESET” and press the SHUTTER button to execute the

program.

1-7.Other test modes

(1) Set the QV-780 in “REC” mode. (2) Execute the test program.

• While holding down the “SHUTTER” and “DELETE” buttons, turn the POWER on.

• While TEST MODE is indicated on the LCD, press “MENU” and “ ” buttons simultaneously.

LCD indicates;

BLACK COLOR BAR APO OFF

(3) Using [ + ] or [ – ] buttons, select a test mode then press “SHUTTER”.

2. PCB K772-DA Adjustment

Contents of the adjustment

(1) VCC1, VCC3 checks (2) VCC7, VEE3 adjustments (3) Clock oscillation frequency check

Checkpoints

CP562

CP561

CP567

CP151

CP573

CP566

CP596 CP150

CP592

CP154

CP153

CP560

CP595

CP594

CP593

CP540

CP155

CP160

CP165

CP167

CP161

CP541

CP166

CP182

CP175

CP168

CP164

CP184

CP183

CP570

CP520

VR651

CP170

CP171

CP578

CP572

CP571

CP529

VR650

SW502

— 8 —

2-1. VCC1, VCC3 voltage check

Apply 5.0 ± 0.05 [V] on check point CP150. (For normal check you can use an AC adaptor however, when the camera is faulty, apply the above mentioned voltage.)

(1) At Power on;

VCC1 (CP164) ................. 3.2 ± 0.16 [V]

VCC5-1 (CP165) .............. 5.25 ~4.75 [V]

VCC5-2 (CP166) .............. 5.25~4.75 [V]

VCC3-1 (CP167) .............. 3.3 ± 0.17 [V]

VCC3-3 (CP168) .............. 3.3 ± 0.17 [V]

VCC3-4 (CP169) .............. 3.3 ± 0.17 [V]

(2) At Power off;

VCC3-1 (CP164) .............. 0 [V]

2-2.VCC7, VEE3 adjustment

Apply 5.0 ± 0.05 [V] on check point CP150. (For normal check you can use an AC adaptor however,

when the camera is faulty, apply the above mentioned voltage.) (1) Adjust VR650 so that VCC7 (CP170) is 15.0 ± 0.45 [V]. (2) Adjust VR651 so that VEE3 (CP171) is -5.5 ± 0.2 [V].

2-3.Clock oscillation check

• Apply 3.2 ± 0.1 [V] on lithium battery terminal (CP578).

• Turn power off.

• Room temperature should be 25 ± 10 °C.

(1) Use quartz timer or frequency counter to measure clock frequency.

• Quartz timer; within ± 62 ppm

• Frequency counter (check point TC500 signal pad); 32.767 ± 0.002 [KHz}

(2) Current consumption; less than 1 [µA]

— 9 —

3. PCB K772-L Adjustment

Contents of the adjustment

(1) VCC1 adjustment and VCC2, VCC6, VEE2, VCC0 voltage check (2) VCO free run frequency adjustment (3) Backlight drive voltage adjustment (4) VCOM AC adjustment and VCOM DC coarse adjustment (5) Brightness voltage setting and contrast adjustment (6) BCC adjustment (7) Color adjustment (8) VCOM DC fine adjustment

Check points

CP317

CP700

CP149

CP900

CP114 CP110

CP901

CP100

VR900

CP146

CP140

CP350

CP111

VR100

CP147

VR350

VR302

CP101

CP145

CP112

CP322

CP120

CP902

VR303

CP300

CP344

CP324

CP320 CP711

CP113

CP733

CP115

CP725

CP308

VR710

CP351

VR301

VR300

CP337

CP142

CP141

— 10 —

3-1.VCC1 adjustment and VCC2, VCC6, VEE2, VCC0 voltage check

Apply 5.0 ± 0.05 [V] on check point CP101. (For normal check you can use an AC adaptor however,

when the camera is faulty, apply the above mentioned voltage.)

(1) Adjust VR100 so that VCC1 is 4.50 ± 0.02 [V] (2) Check the following voltages.

VCC2 ...................... 11.5 ~ 12.5 [V]

VCC6 ...................... 17.5 ~ 19.5 [V]

VEE2....................... -9.5 ~ -11.5 [V]

VCC0 ...................... 2.8 ~ 3.2 [V]

(3) Turn the power off and make sure that all the voltages are 0 [V].

3-2.VCO free run frequency adjustment

• Show color bar in test mode.

• Apply 5.0 ± 0.05 [V] on check point CP101. (For normal check, AC adaptor can be used, however, when the camera is faulty, apply the above mentioned voltage.)

• Connect check points CP725 (SYF) and CP115 (VCC0).

(1) Monitoring CP733 (HDB) with a frequency counter, adjust VR710 so that the frequency is 15.625 ±

0.1 [KHz].

(2) Disconnect CP725 and CP115 and make sure that signals of CP337 (CSY) and CP733 (HDB) are

synchronized.

Power

Supply

VCC0

PCB K772A-L

SYF

(CP725)

QV-780

CSY

(CP337)

HDB

(CP733)

CSY

Oscilloscope

HDB

Frequency

Counter

— 11 —

+ 28 hidden pages