CASIO QV70B, QV-70C Service Manual

QV-70B(NTSC)
QV-70C(PAL)

(KX-770)

OCT. 1997

(without price)

DEL

/PROTECT ZOOM DISP

POWER

ON/OFF

MODE

+

–

REC

PLAY

LCD

ON/OFF

R

CONTENTS

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

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

COLOR ADJUSTMENT................................................................................. 3

MEMORY RESTORING AND RESET ........................................................... 4

DISASSEMBLY ............................................................................................. 6

ASSEMBLY ................................................................................................... 8

PRINTED CIRCUIT BOARDS ....................................................................... 9

EXPLODED VIEW ....................................................................................... 12

PARTS LIST ................................................................................................ 13

SCHEMATIC DIAGRAMS ........................................................................... 19

WAVEFORMS.............................................................................................. 24

SPECIFICATIONS

Item

1. Recording System Digital (JPEG based)

2. Video Signal System NTSC (QV-70B) / PAL (QV-70C)

3. Recording Medium Built-in 2-MB 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; F2.8/f = 5.2 mm

8. Aperture F2.8/F8 manual switching

9. Focal Length F2.8/NORMAL : 0.6 m to 3.0 m
F2.8/MACRO : 12 cm to 14 cm
F8/NORMAL : 0.4 m to ~
F8/MACRO : 10 cm to 18 cm
(from lens protection filter)

10. Light Metering TTL center point by photographic element

11. Exposure Metering Aperture priority AE

12. Exposure Range EV +6 to 18

Specification

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 1.8-inch TFT low-glare color LCD

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

20. Power Supply Batteries (AA-size Alkaline or lithium batteries × 3) /AC Adaptor

21. Current Consumption Approximately 550 mA (REC mode)

22. Dimensions 66(H) × 103(W) × 34(D)mm

23. Weight Approximately 150 g (excluding batteries)

24. Accessories Wirst strap; soft case; video cable;
Alkaline batteries (LR6 × 3)

— 1 —

BLOCK DIAGRAM

Camera Unit Digital PCB

IC701

Lens CDD

A/D
converter

HM538123BJ (NTSC)
HM538253BJ (PAL)
2M bit VRAM

IC602
TC5816AFT-1
16M bit
Flash memory

IC601
HM514800CLJ
2M bit DRAM

VRAM
controller

Data
compressor
expander

IC700
HG51B167FB

ROM

RAM

CPU

I/O
port

Direct
memory
access
controller

Bus
state
controller

Serial
communication
interface

Video
encoder

D/A
converter

Power
supply

Video out

Linear PCB

IC300
IR3P90Y1 (NTSC)
IR3Y21 (PAL)
Chroma circuit

IC400
MSM6770CGS
Display controller

Power
supply

Back
light

AC Adaptor
Battery

LCD

IC600
HD6437034SK24F (NTSC)
HD6437034AK28F (PAL)

Digital I/O

— 2 —

Key PCB

COLOR ADJUSTMENT

THE COLOR ADJUSTMENT IS REQUIRED AFTER THE FOLLOWING SITUATIONS
* The flash memory is initialized by the "AMED-I" command.
* The digital PCB or the camera unit is replaced.

REQUIRED TOOL
Light box: Handy 5000 (Code No.: 1904 5301)
Color filter: LBA 3 (Code No.: 1904 5302)
Color adjustment software: Sdj770vb.exe
Cable for QV-Link

TO DO THE COLOR ADJUSTMENT

1. Connect QV-70 to PC with QV-Link cable.

2. Set the aperture switch of QV-70 to F8.

3. Put the color filter on the light box, and turn the light box on.

4. Put the QV-70 with its lens toward the color filter and light box, and turn the QV-70 on.

5. Execute the color adjustment software "Sdj770vb.exe" on PC (MS-DOS).
Type "Sdj770vb", then press Enter. The message "WAIT" appears on the QV-70 and some parameters
appear on the PC like as the followings.

SUMCODE = 835321
adjust for KX770.

*******************************************
* COLOR ADJUSTMENT for KX770 *
* ver 1.0 *
*******************************************
CAUTION!!! Set f-stop to F8, otherwise doesn't work correctly.
Now adjusting... 0 2
done.

System block 1FE
ASUM 4AB40 CSUM 35662
DSUM 2EA67 ESUM 558FF

RKD FE30 RKE 1D0
BKA 1F0 BKC FE10
GKC 200 GKD 100 GKE FF00

ALPHA FFFC BETA FF82 TINT 155
RAlimit_L BBB RAlimit_H FE0
BAlimit_L 1298 BAlimit_H 1ECE
COL_BAS 28 Y_OFFSET 2
RAMP_INIT DCD BAMP_INIT 18B3
LIN_SUB 108 LIN_SUBY F8

Color filter: LBA 3

Light box: Handy 5000

QV-70

— 3 —

MEMORY RESTORING AND RESET

MEMORY ERROR
"Memory error" (#1 ~ #3) message appears on QV-70 camera, when an error is found in its flash memory. In this
case, the QV-70 is locked up and do not accept any operation except power on / off.

MEMORY ERROR #1
When the memory error #1 occures, press the + button to do the error reset. The following display will be appeared on
QV-70.

ERROR RESET
YES SHUTTER
NO CALL TECH
SUPPORT!

Then press the shutter button. The display should return to normal.
(Refer to owner´s manual for QV-70.)

MEMORY ERROR #2, #3
When the memory error #2 or #3 occures, do the memory restoring.

Notes: 1. When do the error reset or memory restoring, use the AC adaptor.

2. Never turn the power off, while doing the error reset or memory restoring.

MEMORY RESTORING

REQUIRED TOOL
Memory restoring software: Amed.exe
Cable for QV-Link

OPERATION

1. Connect the QV-70 to PC with the cable.

2. Execute the "AMED -PIR" command on MS-DOS, then the following message will be appeared on the PC.

QV series Automatic Memory Error Debugger ver 2.0
Camera type = QV-10A/QV-30 0090:532E

Searching management block ...
Found at bank 1FF status --- OK
Saving management block as "mngblk.dat"

— 4 —

Saving system block at bank 1FE as "sysblk.dat"
Image No. 1 in 006 007 008 009 00A save as "image001.cam"

Image No. 2 in 00B 00C 00D 00E 00F save as "image002.cam"
Image No. 3 in 010 011 012 013 014 save as "image003.cam"

--- Initialize Flash Memory

--- Create mamagement block at bank No.1FF

--- Reset
Restore system block at bank 1FE from "sysblk.dat"
Loading image "image001.cam"

Loading image "image002.cam"
Loading image "image003.cam"

3. The displays on the QV-70 are returned to normal.

When the memory error is not solved by the above steps, do the memory reset and color adjustment.

MEMORY RESET

1. Connect the QV-70 to PC with the cable.

2. Execute the "AMED -I" command on MS-DOS.

3. Do the color adjustment. (See COLOR ADJUSTMENT)

— 5 —

1. Remove the four screws.
Screw

2. Unhook the upper side of the unit, then open

the case from the upper side.

DISASSEMBLY

Screw

Screws

Hooks

3. Be sure not to lose the bright knob, then remove the case.

4. Remove the two screws on the linear

PCB, then disconnect between the linear
and digital PCBs.

Digital PCB

Linear PCB

Bright knob

Screws

5. Disconnect the wire for the back light and the flat
cable for the LCD, then remove the linear PCB.

Flat cable

Wire

— 6 —