66FW-54H (serv.man30). Fitting instructions for alternative four-pin opto coupler (Revision 3) — Sharp TV Technical Bulletin (repair manual). Page 2

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CTV2002 05 02
Month of Issue:  
October 2002
        
Classification: 
White
TELEVISION TECHNICAL BULLETIN
Page 2 of 3
Sharp Electronics (UK) Limited
Reference JR21052002-1
Revision  3
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
 Red – Carry out on all units
Notes
This is a four-pin device and replaces the original six-pin device.
Pins 1 and 2 of the new four-pin device are the same as the original six-pin IC.  Pins 3 and 4 are the
equivalent of pins 4 and 5.  See picture below for more detail:
          Original Device
    
                 Replacement Device
This requires that the new opto-coupler is fitted diagonally, so that the pins are correctly aligned.
Positioning of the opto couplers in the case of IC705 (power)
       1
       2
       3
6
5
4
  1
  2
4
3
Page of 3

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