Sony BRC-300 Repair Investigation.

3/25/2007 M. Antonucci

 
History:

Our camera developed serious issues and was sent out for repair. Multiple boards/ parts were replaced. Camera was repaired and is working normally now

  
Replaced items:
  • Camera Board

 
  • Motor Board
  • CCD (Mounted C. Boards). This assembly consists of the three CCD image sensors and three small amplifier boards that are soldered to the image sensors.
  • Note that the amplifier boards were de-soldered from the CCD chips.
  • Note the metal box the CCD (prism) is attached to. The box is only for protection during shipping.
  • Flex Cables (looks like two were replaced.) This seems rather odd that the cables would need to be replaced. A further inspection may be needed.
Investigation:
   
   
  • Two Fuses have been removed from the motor board. Looks like power (12V) comes in from the white connector to the left of the fuses.

 

 
  • I applied 12 V (current limited to 0.1 A) to the fuses after shorting out the removed fuses. No excessive current flowed.
  • The LEDs on the board lit.
  • I measured the voltages of the on board power supplies. All worked. (3.3V, 1.5 V, 5.0V)

Conclusion: The power board appears as though it may work. It's possible the fuse blew due to a failure on the camera board or the CCD boards. It may be difficult to power up the other boards. Will continue...
  • I measured what appears to be the output of a video chip (OKI).
  • From left to right:
    • National Semiconductor xxxx
    • Altera (FPGA)
    • xxxx (doe not look like it's in the video path.
    • OKI m7654 View Original Web Page (need Google to translate)
  • I didn't measure any shorts on what appears to be the output of the OKI chip. More investigation needed to determine if the was a path of damage!

 
 
Conclusion: (ongoing)
  • So far I don't see any power glitch damage!
  • Don't see any smoked parts.