FinePix S1500 Service Manual
3-2
3. Schematics
Confidential: FUJIFILM Service Center Use Only
3-3.
Description of Main Block Functions
3-3-1.
Technical Overview
Equipped with a 1/2.3-inch square-pixel interline CCD (total pixels 10.17 million pixels). Use memory card [SD-picture card].
Optical system featuring a new single-step retracting 12x zoom lens design
Features a new IC, which can do CCD processing (FLASH, AFE, A/D 3-int-1) AD19000, OS processing, Functions control,
Power control function (BD9739KN), TV enlarged output function.
Flash block module.
3-3-2.
Explanation of each block
CCD block / CAM block
The analog signals output from the CCD (1/2.3-inch square-pixel primary-color interline type (total pixels: 10.17 million
(ICX675EQP) ) undergo false color correction, adaptive interpolation, amplification (AGC) and signal mixing in the
"DI9000 (U502)" CCD signal processing IC. They are then converted (A/D) to 12-bit digital signals and sent to the DSP
system.
The "DI9000 (U502)" CCD signal processing IC also incorporates the V driver and H driver that drive the CCD.
OIS block
The Gyro Sensor (IDG1123) calculates the correction value when it receives vibrations from the camera. Vibration force
received in the IC is converted to parallel voltage, which is then passed through the Microcontroller (LC898102A) where
it is processed. Simultaneously, the HALL Element (HGO 111) sends CCD position signals to the Microcontroller, where
the signal is converted to AD. The correction value is obtained when the Gyro and HALL signals undergo PID calculation.
The correction value is converted to ADA, then, using the BLT method the CCD is shifted to the correct position.
Motor block
The DSP, which receives the command do signal from each operation system, control the motor drive IC "R2A30414NP
(U601)", and control the motor of AF/Shutter/Zoom/Iris.
Signal Process block
Input data from CCD
The 12bit digital image data sent from the CCD/CAM block is sent to DSP of camera (inside the DRAM (64 M byte)),
which equals to 1 frame (3648 pix x 2736 pix) is temporarily stored. At the same time, the image data sent to DSP is
calculated in [Auto calculation block], to obtain the correct AE/AWB/AF. The data is sent to and temporarily stored in
SDRAM.
Recording onto an SD-Picture card
The image data held in SDRAM U100 (CT48568126A-G4) is sent one DSP line at a time to the internal [signal
processing unit], which unpacks the data. This consists of "32-bit -> 10-bit conversion", "pre-processing such as digital
clamping, gamma correction and conversion of the R, G, and B channels from 10 bits to 8 bits", followed by "YC
processing of each of the 8-bit digital RGB signals where Y:Cb:Cr = 4:2:2". The Y, Cb and Cr 8-bit image data is then
sent to the internal buffer -- SDRAM.
The image data of Y/Cb/Cr each 8bit is sent to the inside buffer — SDRAM. [Inside buffer—SDRAM] change “each Y/Cb/
Cr signal of 8bit into the easily changed DCT pattern”. By the DSP [JPEG calculation compression] -> [Media controller]
->SDRAM, and last stored in the SD-Picture card.
Playing back image data from an SD-Picture card
The compressed 8bit image data from the SD-Picture card is sent to it “SDRAM” -> DSP “MEDIA control section” ->
[DMAUNIT] -> [Inside DRAM (16Mbyte)] -> [Media controller] -> [JPEG calculation block] -> [Signal process block].
The imaging system adjustment data is stored by Flash ROM (U100).
LCD / EVF unit
The digital signal from DSP system is sent to the drive IC of LCD unit, through the process block of LCD FPC to undergo
LCD drive and LCD panel adjustment control.
The signals processed by the DSP are also sent to the EVF.
