Download: WARNING Do not use solder containing lead. Note:

WARNING Do not use solder containing lead. Note: This product has been manufactured using lead-free solder in If replacing existing solder containing lead with lead-free sol- order to help preserve the environment. der in the soldered parts of products that have been manufac- Because of this, be sure to use lead-free solder when carrying tured up until now, remove all of the existing solder at those out repair work, and never use solder containing lead. parts before applying the lead-free solder. Lead-free solder has a melting point that is 30 - 40°C (86 - 104°F) higher than solder containing ...
Author: Folver Shared: 8/19/19
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WARNING

Do not use solder containing lead. Note: This product has been manufactured using lead-free solder in If replacing existing solder containing lead with lead-free sol- order to help preserve the environment. der in the soldered parts of products that have been manufac- Because of this, be sure to use lead-free solder when carrying tured up until now, remove all of the existing solder at those out repair work, and never use solder containing lead. parts before applying the lead-free solder. 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 characteris- tics as possible. Set the temperature to 350°C (662°F) or less for chip compo- nents, 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. 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 Tin (Sn) Silver (Ag) Copper (Cu) Composition 96.5 % 3.0 % 0.5 % 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 – 2 –, 1. OUTLINE OF CIRCUIT DESCRIPTION 1-1. CA1 CIRCUIT DESCRIPTION 1. IC Configuration 12 11 10987654321IC901 (ICX488EQF) CCD imager IC905 (H driver, CDS, AGC and A/D converter) 2. IC901 (CCD imager) Gb B Gb B [Structure] R Gr R Gr Interline type CCD image sensor Gb B Gb B Gr Image size Diagonal 6.67 mm (1/2.7 type) R Gr R Gb B Gb B Pixels in total 2396 (H) x 1766 (V) R Gr R Gr Recording pixels 2288 (H) x 1712 (V) Gb B GbBRGr R Gr Gb B GbBRGr R Gr (Note) Horizontal register 13 14 15 16 17 18 19 20 21 22 23 24 (Note) : Photo sensor Fig. 1-1. CCD Block Diagram Pin No. Symbol Pin Description Pin No. Symbol Pin Description 1 Vø6 Vertical register transfer clock 13 VOUT Signal output 2 Vø5B Vertical register transfer clock 14 VDD Circuit power 3 Vø5A Vertical register transfer clock 15 øRG Reset gate clock 4 Vø4 Vertical register transfer clock 16 Hø1B Horizontal register transfer clock 5 Vø3B Vertical register transfer clock 17 Hø2B Horizontal register transfer clock 6 Vø3A Vertical register transfer clock 18 GND GND 7 Vø2 Vertical register transfer clock 19 øSUB Substrate clock 8 Vø1 Vertical register transfer clock 20 CSUB Substrate bias 9 VøST Horizontal addition control clock 21 Hø1A Horizontal register transfer clock 10 VøHLD Horizontal addition control clock 22 Hø2A Horizontal register transfer clock 11 GND GND 23 GND GND 12 GND GND 24 VL Protection transistor bias Table 1-1. CCD Pin Description 3. IC902, IC903 (V Driver) and IC905 (H driver) An H driver and V driver are necessary in order to generate VRT VRB the clocks (vertical transfer clock, horizontal transfer clock and electronic shutter clock) which driver the CCD. VREF IC902 and IC903 are V driver. In addition the XV1-XV6 sig- 2~36 dB 12 nals which are output from IC101 are the vertical transfer CCDIN CDS PxGA VGA ADC DOUT clocks, and the XSG signal is superimposed at IC902 and IC903 in order to generate a ternary pulse. In addition, the CLAMP CLAMPINTERNAL

CLOCKS

XSUB signal which is output from IC101 is used as the sweep pulse for the electronic shutter. A H driver is inside IC905, RG HORIZONTAL PRECISIONand H1, H2 and RG clock are generated at IC905. 4 DRIVERS TIMING CLIH1-H4 CORE 4. IC905 (CDS, AGC Circuit and A/D Converter) SYNC INTERNAL GENERATOR REGISTERS The video signal which is output from the CCD is input to Pin (27) of IC905. There are inside the sampling hold block, AGC HD VD SL SCK SDATA block and A/D converter block. The setting of sampling phase and AGC amplifier is carried out by serial data at Pin (32). The video signal is carried out Fig. 1-2. IC905 Block Diagram A/D converter, and is output by 12-bit. – 3 – VOUT GND VDD GND ØRG VØHLD HØ1B Vertical register VØST HØ2B VØ1 GND VØ2 ØSUB VØ3A CSUB VØ3B HØ1A VØ4 HØ2A VØ5A GND VØ5B VL VØ6, 1-2. CP1 and VF1 CIRCUIT DESCRIPTION 1. Circuit Description 2. Outline of Operation 1-1. Digital clamp When the shutter opens, the reset signals (ASIC and CPU) The optical black section of the CCD extracts averaged val- and the serial signals (“take a picture” commands) from the ues from the subsequent data to make the black level of the 8-bit microprocessor are input and operation starts. CCD output data uniform for each line. The optical black sec- When the TG/SG drives the CCD, picture data passes through tion of the CCD averaged value for each line is taken as the the A/D and CDS, and is then input to the ASIC as 10-bit sum of the value for the previous line multiplied by the coeffi- data. The AF, AE, AWB, shutter, and AGC value are com- cient k and the value for the current line multiplied by the puted from this data, and three exposures are made to obtain coefficient 1-k. the optimum picture. The data which has already been stored in the SDRAM is read by the CPU and color generation is 1-2. Signal processor carried out. Each pixel is interpolated from the surrounding 1. γ correction circuit data as being either R, G, and B primary color data to pro- This circuit performs (gamma) correction in order to maintain duce R, G and B data. At this time, correction of the lens a linear relationship between the light input to the camera distortion which is a characteristic of wide-angle lenses is and the light output from the picture screen. carried out. After AWB and γ processing are carried out, a matrix is generated and aperture correction is carried out for 2. Color generation circuit the Y signal, and the data is then compressed by JPEG and This circuit converts the CCD data into RGB signals. is then written to card memory (SD card). When the data is to be output to an external device, it is taken 3. Matrix circuit data from the memory and output via the USB I/F. When played This circuit generates the Y signals, R-Y signals and B-Y sig- back on the LCD and monitor, data is transferred from memery nals from the RGB signals. to the SDRAM, and the image is then elongated so that it is displayed over the SDRAM display area. 4. Horizontal and vertical aperture circuit This circuit is used gemerate the aperture signal. 3. LCD Block The LCD display circuit is located on the CP1 board, and 1-3. AE/AWB and AF computing circuit consists of components such as a power circuit. The AE/AWB carries out computation based on a 64-segment The signals from the ASIC are 6-bit digital signals, that is screen, and the AF carries out computations based on a 6- input to the LCD directly. The 6-bit digital signals are con- segment screen. verted to RGB signals inside the LCD driver circuit . This LCD has a 3-wire serial, and functions such as the brightness and 1-4. SDRAM controller image quality are controlled. This circuit outputs address, RAS, CAS and AS data for con- Because the LCD closes more as the difference in potential trolling the SDRAM. It also refreshes the SDRAM. between the VCOM (common polar voltage: AC) and the R, G and B signals becomes greater, the display becomes darker; 1-5. Communication control if the difference in potential is smaller, the element opens and 1. SIO the LCD become brighter. This is the interface for the 8-bit microprocessor. In addition, the timing pulses for signals other than the video signals are also input from the ASIC directory to the LCD. 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. 1-6. TG/SG Timing generated for 4 million pixel horizontal addtion CCD control. 1-7. Digital encorder It generates chroma signal from color difference signal. – 4 –, 4. Lens drive block 5. Video clip recording and playback 4-1. Focus drive 5-1. Recording The focus motor is a stepping motor which is microstep-driven The signals from the camera block are input to the ASIC where by IC951. The 4 MHz clock signal (OSCIN) of the control sig- they are processed, and the image data that is stored in the nals (3-wire serial control (SDATA, SCLK, SENAB), VD) and SDRAM of IC103 is input to the IC102 MPEG4 CODEC LSI. SUB CPU that are output from the ASIC (IC101) port is input The CODEC LSI converts this data to encoded MPEG4 data, to IC951 so that IC951 can microstep control the focus motor. after which it is returned to the ASIC as streaming data, and Detection of the standard focusing motor position is carried the data is then written in sequence onto the SD card. At this out by means of photointerruptor sensor inside the lens. time, the audio signals that are input to the built-in microphone are converted into digital data by the audio CODEC IC of IC183, 4-2. Zoom drive and they are then input via the ASIC to IC102 (MPEG4 The zoom motor is a stepping motor which is microstep-driven CODEC). The audio data is then encoded (AAC) by IC102, by IC951. The 4 MHz clock signal (OSCIN) of the control sig- and then it is returned to the ASIC as streaming data and is nals (3-wire serial control (SDATA, SCLK, SENAB), VD) and then written in sequence onto the SD card together with the SUB CPU that are output from the ASIC (IC101) port is input image signals described above. to IC951 so that IC951 can microstep control the zoom motor. Detection of the standard zoom motor position is carried out 5-2. Playback by means of photointerruptor sensor inside the lens. The data is read from the SD card and input to IC102 as stream- ing data. The encoded data is decoded into image data by 4-3. ND filter IC102 and then returned to the ASIC where it is displayed by ND filter control is carried out by the control signals (ND ON the LCD or on a TV monitor. At this time, the audio data is also and ND OFF) that are output from the ASIC (IC101) port and decoded by IC102, and it passes through the ASIC and is in- input to IC951 so that IC951 can drive the ND filter. put to IC183 as digital data. D/A conversion is carried out at The 4 MHz clock signals (OSCIN) of the 3-wire serial control IC183, and the sound is then output to the speaker or to the signals (SDATA, SCLK, SENAB) and SUB CPU allow IC951 to LINE OUT terminal. operate. 6. Audio CODEC circuit (IC183) 4-4. Iris drive The audio signals from the microphone are converted into 16- The drive method is a galvanometer type without braking coil. bit digital data. AD conversion is carried out at a maximum The aperture opening amout is controlled as follows: the out- sampling frequency of 48 kHz. put from the Hall sensor inside the lens is amplified by the Hall During audio playback, the 16-bit digital data is converted into amplifier circuit inside the IC971 lens drive IC, and the differ- analog signals and these drive the speaker or line out system. ence between the current and target aperture determined by DA conversion is carried out at a maximum sampling frequency the resulting output and the exposure amout output from the of 48 kHz. ASIC (IC101) is input to the servo amplifier circuit (IC971) to keep the aperture automatically controlled to the target aper- ture. 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. The 4 MHz clock signals (OSCIN) of the 3-wire serial control signals (SDATA, SCLK, SENAB) and SUB CPU allow IC951 to operate. 4-5. Shutter drive Reverse voltage is applied to the above aperture coil to oper- ate the shutter. With normal operation, the OC_EN and OC_CONT signals that are output from the ASIC (IC101) are maintained at a low level and when the shutter operates, the OC_EN and OC_CONT signals switch to high, and after that the SHUTTER + signal that is output from the ASIC (IC101) becomes high and the shutter operates. It is input to lens drive IN6B of IC951 with low level. IC951 functions as the driver for driving the lens. The 4 MHz clock signals (OSCIN) of the 3-wire serial control signals (SDATA, SCLK, SENAB) and SUB CPU allow IC951 to operate. – 5 –, 1-3. PWA POWER CIRCUIT DESCRIPTION 1. Outline 3. Analog System Power Output This is the main power circuit, and is comprised of the follow- +12 V (A), +3.45 V (A) and -6.0 V (A) are output. Feedback for ing blocks. the +12 V (A) is provided to the switching controller (Pin (4) of Switching controller (IC501) IC501) so that PWM control can be carried out. Analog system power output (L5001, Q5001) 4.5 V power output (L5005, Q5008) 4. Digital 3.25 V Power Output Digital 3.25 V power output (L5006) VDD3 is output. Feedback for the VDD3 is provided to the Digital 1.2 V power output (L5007) swiching controller (Pin (54) of IC501) so that PWM control Backlight power output (L5008, Q5009) can be carried out. Digital 1.8 V power output (L5014, Q5004) Motor system power output (IC531, L5301, Q5301) 5. Digital 1.2 V Power Output VDD1.2 is output. Feedback for the VDD1.2 is provided to the 2. Switching Controller (IC501) switching controller (Pin (52) of IC501) so that PWM control This is the basic circuit which is necessary for controlling the to be carried out. power supply for a PWM-type switching regulator, and is pro- vided with seven built-in channels, only CH1 (digital 1.2 V), 6. 4.5 V System Power Output CH2 (digital 3.25 V), CH4 (4.5 V system), CH5 (analog sys- 4.5 V is output. Feedback for the 4.5 V output is provided to tem), CH6 (backlight system) and CH7 (digital 1.8 V) are used. the switching controller (Pin (2) of IC501) so that PWM con- Feedback from digital system 1.2 V (D) (CH1), 3.25 V (D) trol to be carried out. (CH2), 4.5 V system (CH4), analog system (CH5), backlight system (CH6) and 1.8 V system (CH7) power supply outputs 7. Backlight Power Supply output are received, and the PWM duty is varied so that each one is Regular current is being transmitted to LED for LCD back- maintained at the correct voltage setting level. light. Feedback for the both ends voltage of registance that is Feedback for the backlight power (CH6) is provided to the being positioned to in series LED are provided to the switch- both ends voltage of registance so that regular current can ing controller (Pin (6) of IC501) so that PWM control to be be controlled to be current that was setting. carried out. 2-1. Short-circuit protection circuit 8. Digital 1.8 V Power Output If output is short-circuited for the length of time determined VDD1.8 is output. Feedback for the VDD1.8 is provided to the by internal fixing of IC501 , all output is turned off. The control switching controller (Pin (9) of IC501) so that PWM control to signal (P ON) are recontrolled to restore output. be carried out. 9. Motor System Power Output 4.8 V is output. Feedback for the 4.8 V output is sent to pin (1) of IC531 for PWM control to be carried out. 10. Camera Charging Circuit If the camera’s power is turned off, play mode and USB con- nection 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 micropro- cessor and recharging starts. – 6 –, 1-4. ST1 STROBE CIRCUIT DESCRIPTION 1. Charging Circuit 2. Light Emission Circuit When FLCLT signals are input from the ASIC expansion port, When UNREG power is supplied to the charge circuit and the the stroboscope emits light. CHG signal from microprocessor becomes High (3.3 V), the charging circuit starts operating and the main electorolytic 2-1. Emission control circuit capacitor is charged with high-voltage direct current. When the FLCLT signal is input to Hi at the emission control However, when the CHG signal is Low (0 V), the charging circuit, Q5409 switches on and preparation is made to the circuit does not operate. light emitting. Moreover, when a FLCLT signal becomes Lo, the stroboscope stops emitting light. 1-1. Charging switch The CHG signal becomes High, Q5407 becomes ON and the 2-2. Trigger circuit charging circuit starts operating. The Q5409 is turned ON by the FLCLT signal and light emis- sion preparation is preformed. Simultaneously, high voltage 1-2. Power supply filter pulses of several kV are emitted from the trigger coil and ap- C5401 constitutes the power supply filter. They smooth out plied to the light emitter. ripples in the current which accompany the switching of the oscillation transformer. 2-3. Light emitting element When the high-voltage pulse form the trigger circuit is ap- 1-3. Oscillation circuit plied to the light emitting part, currnet flows to the light emit- This circuit generates an AC voltage (pulse) in order to in- ting element and light is emitted. crease the UNREG power supply voltage when drops in cur- rent occur. This circuit generates a drive pulse with a frequency Beware of electric shocks. of approximately 100-200 kHz. Because self-excited light omis- sion is used, the oscillation frequency changes according to the drive conditions. 1-4. Oscillation transformer The low-voltage alternating current which is generated by the oscillation control circuit is converted to a high-voltage alter- nating 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 high- voltage direct current and is accumulated at electrolytic ca- pacitor C5412. 1-6. Voltage monitoring circuit This circuit is used to maintain the voltage accumulated at C5412 at a constance level. After the charging voltage is divided and converted to a lower voltage by R5405 and R5406, it is output as the monitoring voltage VMONIT. When VMONIT voltage reaches a specified level, the CHG signal is switched to Low and charging is in- terrupted. – 7 –, 1-5. SY1 CIRCUIT DESCRIPTION 1. Configuration and Functions For the overall configuration of the SY1 circuit, refer to the block diagram. The SY1 circuit 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, 5. Signal input and output for zoom and lens control. Pin Signal I/O Outline 1 SCK O Serial clock output 2 CARD I Card detection 3 BACKUP_CTL O Backup battery charge control 4 BAT_CHG ON O Camera battery charge prohibition/permission 5 HOT_L2 I Hot line request from ASIC 6 NOT USED - - 7 LCD_PWM O LCD backlight brightness adjustment 8 NOT USED - - 9 VDD2 - VDD 10 VSS2 - GND 11 VF. LED (R) O Red LED (H= lighting) 12 VF. LED (G) O Green LED (H= lighting) 13 TH ON O Battery temperature & card detection power control 14 BAT_CHG_CNT O Camera charge electric current control 15 BL ON O LCD backlight ON/OFF signal 16 LENS_4M O Lens driver IC standard clock output 17 MAIN RESET O System reset (MRST) 18 LCD ON2 O D/D converter (LCD system) ON/OFF signal 19 USB_DET I USB power detection terminal (L= detection) 20 DC_IN I DC jack detection 21 LCD ON1 O D/D converter (LCD system) ON/OFF signal 22 PLLEN O PLL oscillation ON/OFF 23 TRST O Use LEDA3 when starting 24 AV JACK I AV JACK detection 25 ST_CHG ON O Strobo charge control 26 BOOT_COMREQ I Command request input (combine with BOOT output) 27 PRG ENA/DATA1 I Flash rewrite select terminal 28 AVREF ON O AD VREF ON/OFF signal 29 SCAN IN5 I Key matrix input 30 SCAN IN4 I Key matrix input 31 SCAN IN3 I Key matrix input 32 SCAN IN2 I Key matrix input 33 SCAN IN1 I Key matrix input 34 SCAN IN0 I Key matrix input 35 VSS3 - GND 36 VDD3 - VDD 37 RDSEL I Select terminal for on-tip debugger 38 CLK (SFW) O Flash rewrite (combine with ROM debugger) 39 DATA0 (SFW) O Flash rewrite (combine with ROM debugger) 40 P ON O D/D converter (digital system) ON/OFF signal 41~44 SCAN OUT3~0 O Key matrix output 45 CHGERR I Camera charge error detection See next page → – 8 –, 46 TIME OUT I Camera charging completed detection 47 BAT CHGIICamera charging electric current detection 48 BAT_TMP I Battery temperature detection 49 BAT_OFF/INT0IBattery OFF detection signal input 50 SREQ I Serial communication request signal 51 SCAN IN6IKey matrix input (interruption) 52 NOT USED - - 53 RESET I Microprocessor reset input 54 XCIN I Clock oscillation terminal for clock (32.768 kHz) 55 XCOUT O Clock oscillation terminal for clock (32.768 kHz) 56 VSS1 - GND 57 XIN I Main clock oscillation terminal (4 MHz) 58 XOUT O Main clock oscillation terminal (4 MHz) 59 VDD1 - VDD 60 BATTERY I Battery voltage detection 61 VMONIT I Main condenser charging voltage detection 62 TH_TEMP I Camera temperature detection 63 SO O Serial data output 64 SI I Serial data input Table 5-1. 8-bit Microprocessor Port Specification 2. Internal Communication Bus The SY1 circuit 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. S. REQ 8-bit ASIC SO ASIC Microprocessor ASIC SI ASIC SCK

MRST

Fig. 5-1 Internal Bus Communication System – 9 –, 3. Key Operaiton For details of the key operation, refer to the instruction manual.

SCAN

SCAN IN126OUT03450← LEFT → RIGHT ↑ UP ↓ DOWN SET MENU LCD LOTATION 1 TELE WIDE REC 1st SHUTTER 2nd SHUTTER CAMERA PLAY 2 - - - - - - POWER ON 3 - TEST - - - - PANEL OPEN Table 5-2. Key Operation 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 micro- processor 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. The 8-bit microprocessor first sets the P ON signal at pin (40) to high, and then turns on the DC/DC converter. After this, low signals are output from pin (17) so that the ASIC is set to the reset condition. After this these pins set to high, and set to active condition. If the LCD monitor is on, the LCD ON 1 signal at pin (22) 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, 8 bit LCD

CCD

memory CPU MONITOR5V(A) 3.2 V 3.3 V (L) Power voltage 3.3 V 1.2 V +12 V etc. (ALWAYS) +12 V etc. Power OFF OFF OFF 32KHz OFF Power switch ON- OFF OFF 32KHz OFF Auto power OFF

CAMERA

LCD finder ON ON 4 MHz ON Play back ON OFF 4 MHz ON Table 5-3. Camera Mode Note) 4 MHz = Main clock operation, 32 kHz = Sub clock operation – 10 –]
15

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