CASIO QV30B Service Manual
QV-30 (B) (KX-724B)
(For NTSC)
APR. 1996
(without price)
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 t o +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 —
11
11
Camera PCB 2222 Digital PCB
BLOCK DIAGRAM
33
33
Linear PCB
CCD
Flash
Memory
TC5816FT-1
(KM29N16000T)
D RAM
HM514B00
ALJ8
Power Supply
Circuit
Gate Array
HG51B167FB
V RAM
HM53812BJ8
CPU
CPU
HD6477034F16
HD6437034F16
IC300
IR3P90Y
IC400
MSM6770GS
55
55
VIDEO OUT (Video I/O)
66
66
DIGITAL (Serial I/O)
LCD
DC IN (6V)
AC adaptor
Battery x 4
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.
Key
Key PCB
— 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.
Camera PCB
1 Lens
2 Color
Filter
1 Lens
1 Lens
Concentrates light rays to a point.
Concentrates light rays to a point.
2 Color filter
2 Color filter
The striped color filter in front of the CCD detector is used to provide color information.
The striped color filter in front of the CCD detector is used to provide color information.
It has three colors, yellow, green and cyan.
It has three colors, yellow, green and cyan.
Array of color filter and signal processing (IC801) for camera are extremely close relationship.
Array of color filter and signal processing (IC801) for camera are extremely close relationship.
3 IC802 (CCD)
Ye,Cy,Gr
color signal D0 ~ D7
CCD IN
PHI1~PHI4
PHS1~PHS4
IC800
Driver
VI1~ VI4
VS1 ~ VS4
4 IC801
Sample Hold,
AGC
Timing
Generator
8bit A/D
Converter
MCK,
HRS2,
FTTRG,
STTRG,
CCODE,
ENDFLG
Digital PCB
Data Bus
D RAM
CPU
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
Array of color filter
Red
Ye
White
Green
Cy=Blue+Green
Three Primary colors
— 3 —
Cy
Mg=Blue+RedYe=Red+Green
Mg
Blue
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.
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.
3
4
5
6
PHI4
PHI3
PHI2
PHI1
532(H)
508(H)
Image pickup
492(V)
500(V)
PHIH1~PHIH2:
Clock pulse for the horizontal shift
register.
PHIR:
CCD analog signal output.
PHIR 7
VDD 8
Vout 9
Output
Amp.
VGG
VOG
Storage
Horizontal shift
register (CCD)
PHIH2
PHIS4
PHIS1
PHIS2
PHIS3
PHIH1
19
18
17
16
12 13
4 Camera Signal Processor (IC801)
Sample Hold,
From CCD
to CCD
AGC
Timing
Generator
Sample Hold
Selects a desired signal from the CCD.
14 15
8bit A/D
Converter
D0~D7
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.
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
CCD
IC800
Driver
DIGITAL PCB
+5V
6
Power Supply
+18V
-10V
IC801
Processor
4 IC602
16M Flash Memory
5 IC601
4M D RAM
2 IC700 Gate Array
Control
Timing
Data
Compressor
V RAM
Control
Encoder
1 IC600 Microprocessor
ROM
DMAC
CPU
I/O Port
SCI, Timmer
D/A
RAM
BSC
3 IC701
1M
V RAM
Amp.
Linear
PCB
IC300
Chroma
Circuit
IC400
Display
Control
VIDEO OUTPUT
(Video I/O)
TFT LCD
DIGITAL (Serial I/O)
DC in +6V
Key Input
Battery
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 —
1 CPU (IC600)
Controls the CCD, D RAM, Flash memory and key operation.
1 CPU (IC600)
Controls the CCD, D RAM, Flash memory and key operation.
Port A Address
CS3 ~ CS0, A21 ~ A16PA15 ~ PA0
Reset,
MD2 ~
MD0,
EXTAL,
XTAL
CK
PROM/MASKROM1
CPU
Interrupt
controller
Serial communication
interface (x2channel)
User break
controller
RAM1
Address
A15 ~ A0
Direct memory
access
controller
Direct state controller
16-bit integrated
timer pulse unit
Data/Address
Programmable timing
pattern controller
Port C
PC7 ~ PC0 PB0 ~ PB15
Address bus 24-bit
Data bus 16-bit
A/D
converter
Port B
Address bus 24-bit
High-order 8-bit
Low-order 8-bit
— 6 —
Timer
AD15 ~ AD0
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
Timing
V RAM
Control
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
It is used for encoder function.
3 V RAM
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
KEY PCB
Block Diagram
Key Matrix
VCC3-1
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
BUTTON RESISTOR
KEY 0
KEY 1
KEY 2
CPU
87 pin
88 pin
89 pin
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
H.F.OUT
18 15 19 20 21 22 16 11 17 14 13 23 35 32 34 36
TRAP
SYNC-OUT
SYNC-IN
TIME-CONST
CLAMP
APL
COLOR
AGC.FIL
AGC OUT
PICTURE
Vref
R-OUT
DCDET
G-OUT
B-OUT
42
VIDEO
10
F ADJ
12
ACC.F
APC.F
27
24
Killer.F
26
VCO
SYNC SEP
H filter
Trap D.L
ACC
9
ACC DET
APC Killer
VCO
TINT
BPF
Demodulation
VEE VCC1 GND VCC2 VEE
BGP GEN
CLAMP
Color control
L
P
F
Matrix
Contrast
Picture
quality
ADJ.
AGC DET
AGC AMP
INT/EXT
SW
γ corrector
γ corrector
R Gain
B Gain
INVINV INV
γ corrector
SWP GEN
Clamp
Bright
COM DRIV
38
41
46
40
RGB.
AMP
44
γ 2
45
γ 1
RGB.
INV
39
FRP
28
COM.
AMP
25 7 6 29 33 31 2 5 4 3 1 48 47 43 30
TINT
YEE
VCC1
GND
VCC2
VEE
— 10 —
CONT
EXT-R
SW
EXT-B
EXT-G
B-SUB-CONT
R-SUB-CONT
BRIGHT
COM.OUT
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