SANYO VPCS4 - Service Manual Immediate Download

SERVICE MANUAL

Digital Camera

VPC-S4

VPC-S4U

(Product Code : 126 678 00)

(Europe)

(PAL General)

(Product Code : 126 678 01)

(U.S.A.)

(Canada)

(Korea)

(Taiwan)

Contents

1. OUTLINE OF CIRCUIT DESCRIPTION .................... 2

2. DISASSEMBLY ........................................................ 10

3. ELECTRICAL ADJUSTMENT .................................. 12

4. USB STORAGE INFORMATION

REGISTRATION ...................................................... 17

5. TROUBLESHOOTING GUIDE ................................. 18

6. PARTS LIST ............................................................. 19

ACCESSORIES ....................................................... 19

PACKING MATERIALS ............................................ 19

CABINET & CHASSIS PARTS 1 ............................. 20

CABINET & CHASSIS PARTS 2 ............................. 21

ELECTRICAL PARTS .............................................. 22

CIRCUIT DIAGRAMS &

PRINTED WIRING BOARDS ...................................... C1

The components designated by a symbol ( ! ) in this schematic diagram designates components whose value are of

special significance to product safety. Should any component designated by a symbol need to be replaced, use only the part

designated in the Parts List. Do not deviate from the resistance, wattage, and voltage ratings shown.

CAUTION : Danger of explosion if battery is incorrectly replaced.

Replace only with the same or equivalent type recommended by the manufacturer.

Discard used batteries according to the manufacturer's instructions.

NOTE : 1. Parts order must contain model number, part number, and description.

2. Substitute parts may be supplied as the service parts.

3. N. S. P. : Not available as service parts.

Design and specification are subject to change without notice.

SX716/EX, U

REFERENCE No. SM5310586

FILE NO.

PRODUCT SAFETY NOTICE

Fig. 1-1.Optical Black Location (Top View)

Pin No.

Symbol

Pin Description

Waveform

Voltage

Table 1-1. CCD Pin Description

When sensor read-out

Fig. 1-2. CCD Block Diagram

1. OUTLINE OF CIRCUIT DESCRIPTION

1-1. CP1 CIRCUIT DESCRIPTION

1. IC Configuration

IC903 (MN39483PJJ)

CCD imager

IC901 (AN20101A)

V driver

IC906 (AD9948KCPZ)

CDS, AGC, A/D converter

2. IC903 (CCD)

[Structure]

Interline type CCD image sensor

Optical size

1/2.5 type format

Effective pixels

2336 (H) X 1744 (V)

Pixels in total

2408 (H) X 1758 (V)

Optical black

Horizontal (H) direction: Front 16 pixels, Rear 56 pixels

Vertical (V) direction:

Front 11 pixels, Rear 3 pixels

Dummy bit number

Horizontal : 28 Vertical :1

4, 7

5, 6

V3A, V3B

V2, V4

Vertical register transfer clock

Signal output

-8.0 V, 0 V, 12 V

Aprox. 12 V

Vertical register transfer clock

Output gate

1.4 V

-8.0 V, 0 V

Reset gate clock

GND

Circuit power

15 V

GND

0 V

12.5 V, 16 V

ØR

Protection transister bias

-8.0 V

HL, H1

Horizontal register transfer clock

Substrate clock

SUB

0 V, 3.5 V

16, 17

Horizontal register transfer clock

0 V, 3.5 V

2, 3, 8

V5A, V5B, V1

Vertical register transfer clock

Substrate control

SUBC

0, 3.3 V (When importing all

picture element: 3.3 V)

-8.0 V, 0 V, 12 V

Aprox. 6 V

(Different from every CCD)

Pin 9

Pin 1

: Photo diode

Output

part

(internal

bias)

9 PT

16 SUB

10 øV5

Vertical

shift

Horizontal shift register

(internal

bias)

øV6

øV1

øV2

øV3

øV4

3. Part of IC906 (H Driver) and IC901 (V Driver)

An H driver (part of IC906) and V driver (IC901) are neces-

sary in order to generate the clocks (vertical transfer clock,

horizontal transfer clock and electronic shutter clock) which

driver the CCD.

IC906 has the generation of horizontal transfer clock and the

function of H driver, and is an inverter IC which drives the

horizontal CCDs (H1 and H2). In addition the XV1-XV4 sig-

nals which are output from IC101 are the vertical transfer

clocks, and the XSG signal which is output from IC101 is su-

perimposed onto XV1 and XV3 at IC901 in order to generate

a ternary pulse. In addition, the XSUB signal which is output

from IC101 is used as the sweep pulse for the electronic shut-

ter, and the RG signal which is output from IC906 is the reset

gate clock.

Fig. 1-4. IC906 Block Diagram

4. IC906 (H Driver, CDS, AGC and A/D converter)

IC906 contains the functions of H driver, CDS, AGC and A/D

converter. As horizontal clock driver for CCD image sensor,

HØ1 (A and B) and HØ2 (A and B) are generated inside, and

output to CCD.

The video signal which is output from the CCD is input to pins

(27) of IC906. There are sampling hold blocks generated from

the SHP and SHD pulses, and it is here that CDS (correlated

double sampling) is carried out.

After passing through the CDS circuit, the signal passes

through the AGC amplifier (VGA: Variable Gain Amplifier). It

is A/D converted internally into a 10-bit signal, and is then

input to ASIC (IC101). The gain of the VGA amplifier is con-

trolled by pin (31)-(33) serial signal which is output from ASIC

(IC101).

CCDIN

H1-H4

SDATA

SCK

CLI

DOUT

VRB

VRT

PRECISION

TIMING

CORE

SYNC

GENERATOR

PxGA

VGA

ADC

2~36 dB

VREF

CLAMP

INTERNAL

REGISTERS

INTERNAL

CLOCKS

CDS

CLAMP

HORIZONTAL

DRIVERS

Fig. 1-3. IC901 Block Diagram

IV1

CH1

IV3

CH2

CH3

IV2

IV6

IV5

CH4

CH5

ISUB

OV6

OV8

OV7

OV4

OV5

OV3

OV2

OV1

Level

conversion

IV4

8 OSUB

VDC

VHH

Level

conversion

Level

conversion

Level

conversion

VDC

Level

conversion

VDC

Level

conversion

VDC

Level

conversion

VDC

Level

conversion

VDC

Level

conversion

VDC

Level

conversion

VDC

Level

conversion

VDC

Level

conversion

VDC

VHH

2-level

3-level

2-level

3-level

2-level

VHH

3-level

5. Lens drive block

5-1. Shutter drive

The shutter drive signal (SIN1 and SIN2) which is output from

the ASIC expansion port (IC106) is drived the shutter constant

level driver (IC951), and then shutter plunger is opened and

closed.

5-2. Iris drive

The iris stepping motor drive signals (IIN1 and IIN2) which are

output from the ASIC (IC101) are used to drive by the motor

driver (IC951).

5-3. Focus drive

The focus stepping motor drive signals (FIN1, FIN2, FIN3 and

FIN4) which are output from the ASIC (IC101) are used to

drive by the motor driver (IC951). Detection of the standard

focusing positions is carried out by means of the

photointerruptor (FPI-E) inside the lens block.

5-4. Zoom drive

The zoom DC motor drive signals (ZIN1 and ZIN2) which are

output from the ASIC (IC101) are used to drive by the motor

driver (IC951). Detection of the zoom positions is carried out

by means of photoreflector (ZPI-E) inside the lens block.

6. Circuit description

6-1. Digital clamp

The optical black section of the CCD extracts averaged val-

ues from the subsequent data to make the black level of the

CCD output data uniform for each line. The optical black sec-

tion of the CCD averaged value for each line is taken as the

sum of the value for the previous line multiplied by the coeffi-

cient k and the value for the current line multiplied by the

coefficient (k-1).

6-2. Signal processor

correction circuit

This circuit performs (gamma) correction in order to maintain

a linear relationship between the light input to the camera

and the light output from the picture screen.

2. Color generation circuit

This circuit converts the CCD data into RGB signals.

3. Matrix circuit

This circuit generates the Y signals, R-Y signals and B-Y sig-

nals from the RGB signals.

4. Horizontal and vertical aperture circuit

This circuit is used gemerate the aperture signal.

6-3. AE/AWB and AF computing circuit

The AE/AWB carries out computation based on a 256-seg-

ment screen, and the AF carries out computations based on

a 11-segment screen.

6-4. SDRAM controller

This circuit outputs address, RAS, CAS and AS data for con-

trolling the SDRAM. It also refreshes the SDRAM.

6-5. Communication control

1. SIO

This is the interface for the 8-bit microprocessor.

2. PIO/PWM/SIO for LCD

8-bit parallel input and output makes it possible to switch be-

tween individual input/output and PWM input/output. It is pre-

pared for 16-bit parallel output.

6-6. TG/SG

Timing generated for 4 million pixel CCD control.

6-7. Digital encorder

It generates chroma signal from color difference signal.

6-8. JPEG encorder and decorder

It is compressed and elongated the data by JPEG system.

7. Outline of Operation

When the shutter opens, the reset signals and the serial sig-

nals ("take a picture" commands) from the 8-bit microproces-

sor are input to ASIC (IC101) and operation starts. When the

TG/SG drives the CCD, picture data passes through the A/D

and CDS, and is then input to the ASIC as 12-bit data. The

AF, AE, AWB, shutter, and AGC value are computed from this

data, and three exposures are made to obtain the optimum

picture. The data which has already been stored in the SDRAM

is read by the CPU and color generation is carried out. Each

pixel is interpolated from the surrounding data as being ei-

ther R, G and B primary color data to produce R, G and B

data. At this time, correction of the lens distortion which is a

characteristic of wide-angle lenses is carried out. After AWB

and

processing are carried out, a matrix is generated and

aperture correction is carried out for the Y signal, and the

data is then compressed by the JPEG method by (JPEG) and

is then written to card memory (SD card).

When the data is to be output to an external device, it is taken

data from the memory and output via the USB. When played

back on the LCD and monitor, data is transferred from memery

to the SDRAM, and the data elongated by JPEG decorder is

displayed over the SDRAM display area.

8. LCD Block

LCD block is in the CP1 board, and it is constructed by VCOM

generation circuit etc.

The video signal from the ASIC are 6-bit digital signal, and

input to LCD directly. It is converted into RGB signals at driver

circuit in the LCD.

The VCOM (common polar voltage: AC) and the R, G and B

signals becomes greater, the display becomes darker; if the

difference in potential is smaller, the element opens and the

LCD become brighter. And also the timing pulse except the

video signal is input to LCD directly from ASIC.

1-2. CP1 POWER CIRCUIT DESCRIPTION

1. Outline

This is the main power circuit, and is comprised of the follow-

ing blocks.

Switching controller (IC501)

Analog system power output (T5001, Q5001, IC502)

Digital 3.25 V power output (L5004)

Digital 1.7 V power output (L5005)

5 V system power output (L5003, Q5009)

LCD 15 V system power output (L5001, Q5002)

Backlight power output (L5002)

Motor system power output (IC955, L9551, Q9551)

2. Switching Controller (IC501)

This is the basic circuit which is necessary for controlling the

power supply for a PWM-type switching regulator, and is pro-

vided with seven built-in channels, only CH2 (digital 3.25 V),

CH3 (digital 1.7 V), CH4 (digital system), CH5 (analog sys-

tem), CH6 (LCD system) and CH7 (backlight sysetm) are used.

Feedback from 3.25 V (D) (CH2), 1.7 V (D) (CH3), digital sys-

tem (CH4), analog system (CH5), LCD system (CH6) and

backlight system (CH7) power supply outputs are received,

and the PWM duty is varied so that each one is maintained at

the correct voltage setting level.

Feedback for the backlight power (CH7) is provided to the

both ends voltage of registance so that regular current can

be controlled to be current that was setting.

2-1. Short-circuit Protection Circuit

If output is short-circuited for the length of time setting inside

(Pin (42) of IC501), all output is turned off. The control signal

(P ON) are recontrolled to restore output.

3. Analog System Power Output

+12 V (A), +3.45 V (A) and -8.0 V (A) are output. Feedback for

the 13 V (+12 V (A)) is provided to the switching controller

(Pin (53) of IC501) so that PWM control can be carried out.

+3.45 V (A) is output which dropped 3.4 V by 5V system power

output at regulator IC502.

4. Digital 3.25 V Power Output

+3.25 V (D) is output. Feedback for the +3.25 V (D) is pro-

vided to the switching controller (Pins (32) of IC501) so that

PWM control can be carried out.

5. Digital 1.7 V Power Output

+1.7 V (D) is output. Feedback for the +1.7 V (D) is provided

to the swiching controller (Pin (31) of IC501) so that PWM

control can be carried out.

6. 5 V System Power Output

+5 V is output. Feedback for the +5 V is provided to the

swiching controller (Pin (52) of IC501) so that PWM control

can be carried out.

7. LCD System Power Output

+15 V (L) and 5 V (L) are output. Feedback for the +15 V (L) is

provided to the swiching controller (Pin (56) of IC501) so that

PWM control can be carried out.

8. Backlight Power Output

Regular current is being transmitted to LED for LCD back-

light. Feedback for the both ends voltage of registance that is

being positioned to in series LED are provided to the switch-

ing controller (Pin (48) of IC501) so that PWM control to be

carried out.

9. Motor System Power Output

3.7 V is output. Feedback for the 3.7 V is provided to (Pin (1)

of IC955) so that PWM control can be carried out.