SANYO VPC-G250EX, VPC-G250E, VPC-G250 WARNING

Page 1

WARNING

Do not use solder containing lead.

This product has been manufactured using lead-free solder in order to help preserve the environment. Because of this, be sure to use lead-free solder when carrying out repair work, and never use solder containing lead.

Lead-free solder has a melting point that is 30 - 40°C (86 104°F) higher than solder containing lead, and moreover it does not contain lead which attaches easily to other metals. As a result, it does not melt as easily as solder containing lead, and soldering will be more difficult even if the temperature of the soldering iron is increased. The extra difficulty in soldering means that soldering time will increase and damage to the components or the circuit board may easily occur. Because of this, you should use a soldering iron and solder that satisfy the following conditions when carrying out repair work.

Soldering iron

Use a soldering iron which is 70 W or equivalent, and which lets you adjust the tip temperature up to 450°C (842°F). It should also have as good temperature recovery characteristics as possible. Set the temperature to 350°C (662°F) or less for chip components, to 380°C (716°F) for lead wires and similar, and to 420°C (788°F) when installing and removing shield plates. The tip of the soldering iron should have a C-cut shape or a driver shape so that it can contact the circuit board as flat or in a line as much as possible.

Note:

If replacing existing solder containing lead with lead-free solder in the soldered parts of products that have been manufactured up until now, remove all of the existing solder at those parts before applying the lead-free solder.

Solder

Use solder with the metal content and composition ratio by weight given in the table below. Do not use solders which do not meet these conditions.

Metal content

Composition ratio by weight

Lead-free solder is available for purchase as a service tool. Use the following part number when ordering:

Part name: Lead-free solder with resin (0.5 mm dia., 500 g) Part number: VJ8-0270

Tin (Sn) Silver (Ag)

96.5 %

3.0 %

Copper (Cu)

0.5 %

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Page 2

1. OUTLINE OF CIRCUIT DESCRIPTION

1-1. CCD CIRCUIT DESCRIPTION

1. IC Configuration

The CCD peripheral circuit block basically consists of the following ICs. IC901 (MN39727PMJ-A) CCD imager IC932 (AN20111A) V driver IC931 (AD9942BBCZ) CDS, AGC, A/D converter,

H driver, vertical TG

Pin 1

Pin 15

2. IC901 (CCD)

[Structure]

1/2.5 inch positive pixel-type color frame-reading fixed picture elements 2 channel output

Optical size 1/2.5 type format Effective pixels 2612 (H) X 1954 (V) Pixels in total 2728 (H) X 1966 (V) Optical black

Horizontal (H) direction: Front 58 pixels, Rear 0 pixels Vertical (V) direction: Front 6 pixels, Rear 6 pixels

Dummy bit number Horizontal : 28 Vertical :5

Pin No.

1, 2, 7, 8,

10, 11, 20

Symbol Pin Description

1B, V2, V3B, V4,

V7B, V7R, V8

Vertical register transfer clock

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

Output part 2

1 2 3 4 5 6 7 8

9 10 11 12 19 20 14 18 25 13 27 28 26

VO1

VDD1

GND1

16 15

Horizontal shift register 1

Output part 1

Photo diode

Vertical shift register

Horizontal shift register 2

Fig. 1-2. CCD Block Diagram

Waveform

Voltag e

-6.0 V, 0 V

V7B

V7A

V5B

V5A

V3B

V3A

V1B

V1A

V5R

V7R SUB SUBSW PT GND VO2 VDD2

GND2

3, 9, 12

4, 5, 19

13, 17, 26

15, 28

16, 27

1A, V3A, V7A Vertical register transfer clock

V5B, V5R, V6

GND, GND1,

GND2

SUB

Vertical register transfer clock

GND

Substrate clock

Circuit power

VOL1, VOL2

Signal output

Substrate controlSUB SW

Horizontal register transfer clock

Reset gate clock24

Protection transister bias

Table 1-1. CCD Pin Description

– 3 –

-6.0 V, 0 V, 12 V

-6.0 V, 0 V

-6.0 V, 0 V, 12 V

GND

0 V

Aprox. 6 V (Different from every CCD)

12 VVDD1, VDD2

DC Aprox. 12 V

0, 3.4 V (When importing all picture element: 3.4 V)

0 V, 3.4 V

4.2 V, 9.0 V

-6 V

When sensor read-out

Page 3

3. IC932 (V Driver)

A V driver (IC932) is necessary in order to generate the clocks (vertical transfer clock and electronic shutter clock) which driver the CCD. In addition the XV1-XV8 signals which are output from IC102 are vertical transfer clocks, and the XSG signal is superimposed onto XV1, XV3, XV5 and XV7 at IC932 in order to generate a ternary pulse. In addition, the XSUB signal which is output from IC102 is used as the sweep pulse for the electronic shutter.

VMSUB

OSUB

OV5R

OV7R

OV4

OV6

OV8

RESET

SUBCNT

SUB

VDC

V7R

V5R

3-level

2-level

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

3-level

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

Level

conversion

VHH

OV1B

OV1A

OV3B

OV3A

OV5B

OV5A

OV7B

OV7A

GND

CH8

CH4

CH7

CH3

CH6

CH2

CH1

4. IC931 (H Driver, CDS, AGC and A/D converter)

IC931 contains the functions of H driver, CDS, AGC and A/D converter. As horizontal clock driver for CCD image sensor, HØ1, HØ2, HØL and RG are generated inside, and output to CCD. The video signal which is output from the CCD is input to pin (1) and pin (74) of IC931. 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 14-bit signal, and is then input to MOVIC (IC102). The gain of the VGA amplifier is controlled by pins (4), (5), (6), (69), (70) and (71) serial signal which is output from ASIC (IC101).

REFT_B

TIMING

CORE

SYNC

HD_B

REFB_B

VREF_B

VD_B

ADC

CLAMP

ADC

SL_A

SDATA_A

AD9942

INTERNAL

REGISTERS

SL_B

SDATA_B

DOUT_A

DOUT_B

CLI_A

CLI_B

SCK_A SCK_B

CCDIN_A

CCDIN_B

RG_A

RG_B

H1A TO H4A

H1B TO H4B

REFT_A

REFB_A

VREF_A

CDS

HORIZONTAL

DRIVERS

VGA

0~18 dB

VGA

INTERNAL CLOCKS

PRECISION

GENERATOR

VD_A

HD_A

Fig. 1-4. IC931 Block Diagram

Fig. 1-3. IC932 Block Diagram

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Page 4

1-2. CP1 and VF1 CIRCUIT DESCRIPTION

1. Circuit Description 1-1. Digital clamp

The optical black section of the CCD extracts averaged values from the subsequent data to make the black level of the CCD output data uniform for each line. The optical black section of the CCD averaged value for each line is taken as the sum of the value for the previous line multiplied by the coefficient k and the value for the current line multiplied by the coefficient 1-k.

1-2. Signal processor

1. γ 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 signals from the RGB signals.

4. Horizontal and vertical aperture circuit

This circuit is used gemerate the aperture signal.

1-3. AE/AWB and AF computing circuit

The AE/AWB carries out computation based on a 64-segment screen, and the AF carries out computations based on a 6segment screen.

1-4. SDRAM controller

This circuit outputs address, RAS, CAS and AS data for controlling the SDRAM. It also refreshes the SDRAM.

1-5. 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 between individual input/output and PWM input/output.

2. Outline of Operation

When the shutter opens, the reset signals (ASIC and CPU) and the serial signals (“take a picture” commands) from the 8bit microprocessor are input 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 MOVIC as 13-bit 2 channels data. The data that is input to the MOVIC is converted to 1 ch from 2 ch, and input to the SDRAM through digital clamp. The data that is input to SDRAM is input to the ASIC through the D1 I/F. 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 either 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 γ 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 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 I/F. When played back on the LCD and monitor, data is transferred from memery to the SDRAM, and the image is then elongated so that it is displayed over the SDRAM display area.

3. LCD Block

The LCD display circuit is located on the CP1 board, and consists of components such as a power circuit. The signals from the ASIC are 8-bit digital signals, that is input to the LCD directly. The 8-bit digital signals are converted to RGB signals inside the LCD driver circuit . This LCD has a 3-wire serial, and functions such as the brightness and image quality are controlled. Because the LCD closes more as the difference in potential between 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. In addition, the timing pulses for signals other than the video signals are also input from the ASIC directory to the LCD.

1-6. TG/SG

Timing generated for 5 million pixel horizontal addtion CCD control.

1-7. Digital encorder

It generates chroma signal from color difference signal.

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Page 5

4. Lens drive block

4-1. Focus drive

The 16-bit serial data signals (LENS_SD) and (LENS_CK and LENS_EN) which are output from the ASIC (IC101) are used to drive (FOCUS A +, FOCUS A -, FOCUS B + and FOCUS B

-) by the motor driver (IC951), and are then used to microstepdrive the stepping motor for focusing operation. Detection of the standard focusing positions is carried out by means of the photointerruptor (F_SENSE) inside the lens block.

4-2. Zoom drive

The 16-bit serial data signals (LENS_SD) and (LENS_CK and LENS_EN) which are output from the ASIC (IC101) are used to drive (ZOOM A +, ZOOM A -, ZOOM B + and ZOOM B -) by the motor driver (IC951), and are then used to microstep-drive the stepping motor for zooming operation. Detection of the standard zooming positions is carried out by means of the photointerruptor (Z_SENSE) inside the lens block.

4-3. ND filter

The ND filter drive signals (NDON and NDOFF) which are output from the ASIC (IC101) are used to drive (ND + and ND -) by the motor driver (IC951), and then the ND filter is inserted into and removed from the beam path.

5. Video Clip Recording and Playback

5-1. Recording

The signal from the camera block is input to IC102 (MOVIC). The data that is input to the MOVIC is input to SDRAM, and input to IC101 (ASIC) through D1 (I/F). The MOVIC converts this data to encoded MPEG4 data, after which it is returned to the ASIC as streaming data, and the data is then written in sequence onto the SD card. At this time, the audio signals that are input to the built-in microphone are converted into digital data by the audio CODEC IC of IC183, and they are then input to IC102 (MOVIC). The audio data is then encoded (AAC) by IC102, and then it is returned to the ASIC as streaming data and is then written in sequence onto the SD card together with the image signals described above.

5-2. Playback

The data is read from the SD card and input to IC102 as streaming data. The encoded data is decoded into image data by IC102 and then returned to the ASIC where it is displayed by the LCD or on a TV monitor. D4 image is output from IC102. At this time, the audio data is also decoded by IC102, and is input to IC183 as digital data. D/A conversion is carried out at IC183, and the sound is then output to the speaker or to the LINE OUT terminal.

4-4. Iris drive

The drive method is a galvanometer type without braking coil. The output from the Hall sensor inside the lens is amplified by the Hall amplifier circuit inside the IC971 lens drive IC, and the difference between the current and target aperture determined by the resulting output and the exposure amout output from the ASIC (IC101) is input to the servo amplifier circuit (IC971) to keep the aperture automatically controlled to the target aperture. The lens aperture control signal is output from IC971 and is input to lens drive IN6B of IC951. IC951 functions as the driver for driving the lens.

4-5. Shutter drive

Reverse voltage is applied to the above aperture drive coil to operate the shutter. When the shutter operates, the OC_EN and OC_CONT signals are maintained at a high level, it is input to IN6B of IC951 with low level. At the same time the SHUTTER + signal that is output from the ASIC (IC101) becomes high (input to IN6A of IC951) and the shutter operates. IC951 functions as the driver for driving the lens.

6. Audio CODEC Circuit (IC183)

The audio signals from the microphone are converted into 16bit digital data. AD conversion is carried out at a maximum sampling frequency of 48 kHz. During audio playback, the 16-bit digital data is converted into analog signals and these drive the speaker or line out system. DA conversion is carried out at a maximum sampling frequency of 48 kHz.

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Page 6

1-3. PW1 POWER CIRCUIT DESCRIPTION

1. Outline

This is the main power circuit, and is comprised of the following blocks. Switching controller (IC501) Analog 12 V power output (L5009) Analog -6 V power output (L5008) Analog 3.4 V power output (L5013) 5 V power output (L5005) Digital 3.25 V power output (L5006) Digital 1.2 V power output (L5007) Backlight power output (L5011)

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 provided with eight built-in channels, only SU (5 V), M (digital

3.25 V), SD (digital 1.2 V), BST (analog 12 V), INV (analog -6 V), AFE (analog 3.4 V) and LED (backlight) are used. Each power supply output is received, and the PWM duty is varied so that each one is maintained at the correct voltage setting level. Feedback for the backlight power (LED) is provided to the both ends voltage of registance so that regular current can be controlled to be current that was setting.

3. Analog 12 V Power Output

HVVDD is output through +12 V (A) and IC503 regulator. Feedback for the +12 V (A) is provided to the switching controller (Pin (26) of IC501) so that PWM control can be carried out.

4. Analog -6 V Power Output

-6 V (A) is output. Feedback for the -6 V (A) is provided to the swiching controller (Pin (25) of IC501) so that PWM control can be carried out.

5. Analog 3.4 V Power Output

+3.4 V (A) is output. Feedback for the +3.4 V (A) is provided to the switching controller (Pin (11) of IC501) so that PWM control to be carried out.

6. 5 V Power Output

+5 V is output. Feedback for the +5 V is provided to the switching controller (Pin (42) of IC501) so that PWM control to be carried out.

7. Digital 3.25 V Power Output

+3.25 V (D) is output. Feedback for the +3.25 V (D) is provided to the switching controller (Pin (2) of IC501) so that PWM control to be carried out.

2-1. Short-circuit protection circuit

If output is short-circuited for the length of time determined by internal fixing of IC501 , all output is turned off. The control signal (P ON) are recontrolled to restore output.

8. Digital 1.2 V Power Output

+1.2 V (D) is output. Feedback for the +1.2 V (D) is provided to the switching controller (Pin (12) of IC501) so that PWM control to be carried out.

9. Backlight Power Supply output

Regular current is being transmitted to LED for LCD backlight. Feedback for the both ends voltage of registance that is being positioned to in series LED are provided to the switching controller (Pin (37) of IC501) so that PWM control to be carried out.

10. Camera charging circuit

If the camera’s power is turned off, play mode and USB connection mode (card reader and pictbridge) setting while it is connected to the AC adaptor, the battery will be recharged. In the above condition, a CTL signal is sent from the microprocessor and recharging starts.

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Page 7

1-4. PW1 STROBE CIRCUIT DESCRIPTION

1. Charging Circuit

When UNREG power is supplied to the charge circuit and the CHG signal from microprocessor becomes High (3.3 V), the charging circuit starts operating and the main electorolytic capacitor is charged with high-voltage direct current. However, when the CHG signal is Low (0 V), the charging circuit does not operate.

1-1. Charge switch

When the CHG signal switches to Hi, IC541 starts charging operation.

1-2. Power supply filter

C5401 constitutes the power supply filter. They smooth out ripples in the current which accompany the switching of the oscillation transformer.

1-3. Oscillation circuit

This circuit generates an AC voltage (pulse) in order to increase the UNREG power supply voltage when drops in current occur. This circuit generates a drive pulse with a frequency of approximately 200-300 kHz.

2. Light Emission Circuit

When FLCLT signal is input from the ASIC, the stroboscope emits light.

2-1. Emission control circuit

When the FLCLT signal is input to the emission control circuit, Q5402 switches on and preparation is made to the light emitting. Moreover, when a FLCLT signal becomes Lo, the stroboscope stops emitting light.

2-2. Trigger circuit

The Q5402 is turned ON by the FLCLT signal and light emission preparation is preformed. Simultaneously, high voltage pulses of several kV are emitted from the trigger coil and applied to the light emitter.

2-3. Light emitting element

When the high-voltage pulse form the trigger circuit is applied to the light emitting part, currnet flows to the light emitting element and light is emitted.

Beware of electric shocks.

1-4. Oscillation transformer

The low-voltage alternating current which is generated by the oscillation control circuit is converted to a high-voltage alternating current by the oscillation transformer.

1-5. Rectifier circuit

The high-voltage alternating current which is generated at the secondary side of T5401 is rectified to produce a highvoltage direct current and is accumulated at electrolytic capacitor C5412.

1-6. Charge monitoring circuit

The functions programmed in the IC541 monitor oscillations and estimate the charging voltage. If the voltage exceeds the rated value, charging automatically stops. Then, the ZCHGDONE signal is changed to Lo output and a "charging stopped" signal is sent to the microcomputer.

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Page 8

1-5. SYA CIRCUIT DESCRIPTION

1. Configuration and Functions

For the overall configuration of the SYA block, refer to the block diagram. The SYA block centers around a 8-bit microprocessor (IC301), and controls camera system condition (mode). The 8-bit microprocessor handles the following functions.

1. Operation key input, 2. Clock control and backup, 3. Power ON/OFF, 4. Storobe charge control.

21 CAM_LED

22 BAT_LED

23 PLLEN

25 TH_ON

30~33

35, 36

43~46

Signal

SCLK

ZCARD

BACKUP CTL

CHG_CNT

HOT LINE

VF. LED (R)

LCD PWM

NOT USED

VDD2

VSS2

CHG ON

LCD ON1

CLKSEL0

P ON

BL ON

LENS 4M

NOT USED

MRST

VF. LED (G)

ZUSB_DET

USB_TRIG

BATCHGERR

LCD ON2

BATCHGCNT

AVREF ON

SCAN IN5~2

NOT USED

SCAN IN1, 0

VSS3

VDD3

RD SEL

FLW_SCK

FLW_SO

DC_IN

SCAN OUT3~0

BOOT_COMREQ

BAT_CHGI

ZAV_JACK

I/O

Outline

Serial data clock

SD card detection (L= card)

Backup battery charge control

Camera battery charge prohibition/permission

Hot line from ASIC

VF. LED (red) (H= lighting)

Backup 3.2 V

GND

Strobo condensor charge control signal (H= charge)

LCD start-up signal output (H= start up)

ASIC clock selection (fixing)

D/D converter ON/OFF control (H= ON)

LCD backlight ON/OFF control (H= ON)

Lens driver IC standard CLK

System reset output

VF. LED (green) (H= lighting)

USB detection input

Cradle camera detection display LED drive

Cradle charge display LED drive

PLL ON/OFF control (H= ON)

Cradle USB trigger detection

Temperature sensor power ON/OFF

Camera battery charge error detection (L= detection)

LCD power control (12 vL)

Camera charge control

SW 3.2 V ON/OFF control (L= ON)

Keyscan input 5~2

Keyscan input 1, 0

GND

Backup 3.2 V

ON-tip debugger select terminal

Serial data clock for flash

Serial data output for flash

DC power connection detection input (L= detection)

Keyscan output 3~0

Command request input (combined with BOOT output)

IC521 charge electric current monitoring

AV jack detection (L= HD/ M=SD/ H=USB cable or no cable)

See next page →

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Page 9

56 57

BAT_TEMP

NOT USED

BAT_OFF

ZSREQ

SCAN IN6

IR_IN

RESET

XCIN

XCOUT

VSS1

XIN I

XOUT O Main clock

VDD1

BATTERY

CHG_DONE I Strobo condensor charging completion signal input (H= completion)

INT_TEMP I

ASIC_SDO I

ASIC_SDI

NOT USED -

I Battery OFF detection signal input (L= OFF detection)

I/O

I I

I UNREG_SY voltage mesurement input

Table 5-1. 8-bit Microprocessor Port Specification

Lithium battery temperature detection

Transmission clock for communication (SYA ↔ ASIC)

Keyscan input 6

Infrared remote control transmission data input

Reset input

Clock (32.768 kHz)

Clock

GND

Main clock (4MHz)

Backup 3.2 V

Substrate temperature measurement input around ASIC

Serial data input to ASIC

Serial data output to ASIC

2. Internal Communication Bus

The SYA block carries out overall control of camera operation by detecting the input from the keyboard and the condition of the camera circuits. The 8-bit microprocessor reads the signals from each sensor element as input data and outputs this data to the camera circuits (ASIC) or to the LCD display device as operation mode setting data. Fig. 5-1 shows the internal communication between the 8-bit microprocessor, ASIC and SPARC lite circuits.

ASIC RESET

S. REQ

8-bit

Microprocessor

Fig. 5-1 Internal Bus Communication System

ASIC SO

ASIC SI

ASIC SCK

MRST

ASIC

3. Key Operaiton

For details of the key operation, refer to the instruction manual.

SCAN OUT

SCAN IN

← LEFT

TELE

SEQUENTIAL

SHOT

→ RIGHT

WIDE

POP UPHD/SD

TEST

↑ UP

REC

LCD

ROTATION

STROBO

Table 5-2. Key Operation

– 10 –

↓ DOWN

SHUTTER 1st

SET

SHUTTER 2nd

CAMERA

PLAY

SPEED UP

POWER ON

PANEL OPEN

Page 10

4. Power Supply Control

The 8-bit microprocessor controls the power supply for the overall system. The following is a description of how the power supply is turned on and off. When the battery is attached, a regulated 3.2 V voltage is normally input to the 8-bit microprocessor (IC301) by IC302, so that clock counting and key scanning is carried out even when the power switch is turned off, so that the camera can start up again. When the battery is removed, the 8-bit microprocessor operates in sleep mode using the backup lithum battery. At this time, the 8-bit microprocessor only carries out clock counting, and waits in standby for the battery to be attached again. When a switch is operated, the 8-bit microprocessor supplies power to the system as required. Both the PA ON signal from the ASIC and the P ON signal from the 8-bit microprocessor at pin (16) set to high, and then turns on the DC/DC converter. After this, low signal is output from pin (18) so that the ASIC is set to the reset condition. After, this pin set to high, and set to active condition. If the LCD monitor is on, the LCD ON 1 signal at pin (12) set to high, and the DC/DC converter for the LCD monitor is turned on. Once it is completed, the ASIC returns to the reset condition, all DC/DC converters are turned off and the power supply to the whole system is halted.

ASIC,

memory

Power voltage

Power OFF

Power switch ON-

Auto power OFF

CAMERA

LCD monitor

Play back

Table 5-3. Camera Mode

Note) 4 MHz = Main clock operation, 32 kHz = Sub clock operation

3.3 V 1.2 V

OFF

CCD

5 V (A)

+12 V etc.

OFF

8 bit

CPU

3.2 V

(ALWAYS)

32KHz OFF

4 MHz ON

MONITOR

12 V etc.

LCD

3.3 V

– 11 –