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4. DSC-75 and DSC-S85 Block Diagram
Chapter 4 - DSC-S75 and DSC-S85 Block Diagram
The following is a short explanation of the internal camera operations in block diagram format, based on the SY-
68 board as the central item.
Overview
Refer to Figure 4-1. Most of the camera functions are concentrated on SY-68 board, including interfaces for
external switches, controls and I/O interfaces to the outside world. The power supply is on the DM-101 board.
Operation
The camera is controlled by three processors: CAMERA DSP IC301, FRONT CONTROL IC402 and MC CAMERA
SH DSP IC501. The video to the LCD panel and a power supply DC CONTROL IC.
• The CAMERA DSP converts the light image falling on the CCD into video signals for the LCD monitor and A/
V jack and into digital video data for the memory stick and USB port.
• The Front Control IC acts as an I/O interface. It processes all input commands from the camera switches
dials and sensors, controls the flash charging and generates the characters for the LCD monitor panel and
the LCD readout display.
• The MC Camera SH DSP IC controls the digital data to the LCD monitor panel (the video signals are controlled
by the Camera DSP) and the USB I/O.
• The DC Control IC controls all of the regulated power supply outputs from the DM-101 board.
Accessory jack J782 interfaces with the camera LANC data and is also used for triggering an external flash.
CN753 is the Memory Stick™ socket
SY-68 Board Troubleshooting
The SY-68 board is not a repairable item. If defective, it should be replaced and the old board returned for core
credit, as per Sony policy.
The board, together with the lens assembly, is easily removable once the back cover is taken off. They are held
in place by just five easily visible screws; no further explanation is necessary.
N The camera must be fully aligned after the board is replaced. This includes flange back adjustment. To
reduce the alignment time, whenever possible use Radar W to upload and save the data from the original SY
board to the computer then download it back into the new board.
? If camera is intermittent, check the SY board for flatness. Replace if it is slightly bowed along its long axis.
? After replacing a SY-68 board, the camera may display Japanese characters. Use the Service RM-95 to
change the display to English. Change the data in page D, address 4F, to 04 (do not forget to disable write
protect before writing and to press Pause after writing). You can also use this method if the user inadvertently
changes the display to another language.
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