Sharp 66GS-62 (serv.man22) Service Manual / Technical Bulletin ▷ View online
CTV 2004 03 07
Month of Issue:
March 2004
Classification:
White
TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
Reference AvW 10 03 2004 - 7
Revision 1
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
MODEL
66GS62H
Audio Problems with the GA10 Chassis
Problems in the audio stage on the GA10 chassis can normally be attributed to either the MSP or NVM corruption. In
the case of the latter, reprogramming with the correct data will cure the problem.
the case of the latter, reprogramming with the correct data will cure the problem.
Set Enters Standby at Switch On
There is a protection line that monitors the outputs to the loudspeakers. If this output becomes unbalanced, then the
protection pin on the processor (pin 63 - PROT) will go low, putting the set into standby. This normally happens if the
loudspeakers are left unplugged when servicing the set. Depending upon the component tolerances on the chassis,
this fault can also happen intermittently while the set is running.
There is a protection line that monitors the outputs to the loudspeakers. If this output becomes unbalanced, then the
protection pin on the processor (pin 63 - PROT) will go low, putting the set into standby. This normally happens if the
loudspeakers are left unplugged when servicing the set. Depending upon the component tolerances on the chassis,
this fault can also happen intermittently while the set is running.
Low audio levels on SCART inputs
This normally happens after the NVM has been blanked - if it is reprogrammed using the data on the Sharp Technical
Web, then this will not happen.
This normally happens after the NVM has been blanked - if it is reprogrammed using the data on the Sharp Technical
Web, then this will not happen.
Set up the NVM as follows:
24645 Type NVM
24C16 Type NVM
Page
Address
Value
Page
Address
Value
08
72
2A
03
4E
14
08
73
00
03
4F
00
03
50
14
03
51
00
No Sound
This can be caused by the failure of D744 (short circuit). F703 can also fail.
This can be caused by the failure of D744 (short circuit). F703 can also fail.
Cracking, Distorted or Intermittent Sound
Faults of this nature can be caused by the failure of the MSP, IC303 or dry joints on XL301. IC303 can also suffer from
dry joints, reflowing all pins should cure this type of problem.
Faults of this nature can be caused by the failure of the MSP, IC303 or dry joints on XL301. IC303 can also suffer from
dry joints, reflowing all pins should cure this type of problem.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
D744
SMD Diode, LL4148
RH-DX0551BMZZ
AA
F703
Fuse, 4A
QFS-J4021CEZZ
AE
IC303
IC, MSP3410
RH-IX1853BMZZ
BC
Display
