Read Sharp 66GF-64 (serv.man2) Service Manual online
DA100 (50Hz) and DA50W Chassis – Repair Notes
Page 24 of 80
Figure 19: Location of Centre Speaker
PWB
Figure 20: Location of
Components on the CRT PWB
When the avalanche diode is fitted, only four components generally need to be replaced (D735, Q601, IC705 and
C720), this is because it prevents further damage to the circuitry should the power supply be kept running.
Sharp produce a kit that contains these four items - use the part number FWSERVKIT01//
If the set is operated for prolonged periods without the avalanche diode fitted, then damage will occur to other
parts of the circuit. The CRT PWB suffers normally all the electrolytic capacitors have to be replaced if this is
the case. The moral is, DO NOT run the set when high HT is present.
Sharp Electronics (UK) Limited - May 2003
Revision 3
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