Sharp 66GS-62 (serv.man17) Service Manual / Technical Bulletin ▷ View online
CTV 2004 03 02
Date of Issue: 10
th
November 2004
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 2 of 3
Sharp Electronics (UK) Limited
Reference AvW 10 03 2004 - 2
Revision 4
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
Dead set (low or no power supply output)
If the power supply does not kick off - start up oscillator running, but Q702 and Q703 not energising the chopper
transformer - the HT will be low (up to 40V) or zero. Q702 or Q703 breaking down internally can cause this, even
though they can measure all right on a meter.
If the power supply does not kick off - start up oscillator running, but Q702 and Q703 not energising the chopper
transformer - the HT will be low (up to 40V) or zero. Q702 or Q703 breaking down internally can cause this, even
though they can measure all right on a meter.
If the feedback from the voltage feedback circuit based around he opto-coupler, IC703 is incorrect then the HT will fail
to rise. Q713 has been known to fail short circuit, but other components in this area can cause the same fault.
to rise. Q713 has been known to fail short circuit, but other components in this area can cause the same fault.
Intermittent Operation
Unit intermittently will not start up from standby, shuts down or the line collapses. Q606 failing intermittent, it may read
perfectly alright on a component test. This transistor is part of the protection feedback circuit.
Unit intermittently will not start up from standby, shuts down or the line collapses. Q606 failing intermittent, it may read
perfectly alright on a component test. This transistor is part of the protection feedback circuit.
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.
Takes a Long Time to start up or may not start up at All
There are two possible causes of this problem - D724 can go leaky or short circuits, reducing the +5V supply, or the
processor can fail. There are two different types of microprocessor fitted to this model depending upon the size of the
EEPROM (IC1003). See parts issues Technical Bulletin for more information on this.
There are two possible causes of this problem - D724 can go leaky or short circuits, reducing the +5V supply, or the
processor can fail. There are two different types of microprocessor fitted to this model depending upon the size of the
EEPROM (IC1003). See parts issues Technical Bulletin for more information on this.
Intermittent Turning On
When the set is left in standby, it may turn on. This fault can be very intermittent. This problem is caused by failure of
C1013.
When the set is left in standby, it may turn on. This fault can be very intermittent. This problem is caused by failure of
C1013.
Location of C1013 on the Print Side of the PWB
Intermittent line collapse or turning off
This problem can be caused by one of the HT feedback resistors (R742, R743, R744 and R745) on the secondary of
the power supply. Usually it is R743 that fails and it is best to check this component by substitution as the fault may not
respond to flexing the PWB.
This problem can be caused by one of the HT feedback resistors (R742, R743, R744 and R745) on the secondary of
the power supply. Usually it is R743 that fails and it is best to check this component by substitution as the fault may not
respond to flexing the PWB.
CTV 2004 03 02
Date of Issue: 10
th
November 2004
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 3 of 3
Sharp Electronics (UK) Limited
Reference AvW 10 03 2004 - 2
Revision 4
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
C1013
SMD Capacitor
VCKYTV1CF105Z*
AA
C709
Capacitor, 10
µ
F 50V
VCEAGA1HW106M
AH
C713
Capacitor, 68uF 450V
RC-EZ0141BMZZ
AL
C716
SMD Capacitor, 6.8nF 50V
VCKYTV1HB682K
AA
D724
SMD Zener Diode, 2V4
RH-EX0574BMZZ
AA
D736
Diode, IN4937
RH-DX0579BMZZ
AB
D737
SMD Diode, LL4148
RH-DX0551BMZZ
AA
D739
Zener Diode, 33V
RH-EX0427BMZZ
AA
F701
Fuse, 3.15AH 20mm
QFS-C3226CEZZ
AE
IC1001
Microprocessor (NVM 24C16)
RH-IX1856BMZZ
BA
IC1001
Microprocessor (NVM 24645)
RH-IX1798BMZZ
BA
Q606
SMD Transistor, 2SC2412
VS2SC2412KQ-1
AA
Q701
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q702
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q703
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q713
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q715
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q720
SMD Transistor, 2SC2412
VS2SC2412KQ-1
AA
Q721
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q725
SMD Transistor, BC847
RH-TX0232BMZZ
AA
R705
SMD Resistor, 8.2k 1/10W
VRS-TV1JD822J
AA
R714
Resistor, 0.56R 2W
VRN-VV3LBR56J
AB
R718
Resistor, 10
Ω
0.5W
RR-XZ0212BMZZ
AB
R742
SMD Resistor, 120K
Ω
1%
VRS-TQ2BD124F
AA
R743
SMD Resistor, 120K
Ω
1%
VRS-TQ2BD124F
AA
R744
SMD Resistor, 3.9K
Ω
1%
VRS-TV1JD392J
AA
R745
SMD Resistor, 470K
Ω
1%
VRS-TV1JD473J
AA
R753
SMD Resistor, 22k
Ω
VRS-CY1JF222J
AA
Note that the list of components given above IS NOT a parts list to cure all power related problems in this chassis. It
has been compiled to show all the part numbers for items refered to in this document. If the parts noted in the text are
not faulty, carry out fault finding procedures to locate the problematic part.
has been compiled to show all the part numbers for items refered to in this document. If the parts noted in the text are
not faulty, carry out fault finding procedures to locate the problematic part.
CTV 2004 03 02
Date of Issue: 10
th
November 2004
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 3 of 3
Sharp Electronics (UK) Limited
Reference AvW 10 03 2004 - 2
Revision 4
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
C1013
SMD Capacitor
VCKYTV1CF105Z*
AA
C709
Capacitor, 10
µ
F 50V
VCEAGA1HW106M
AH
C713
Capacitor, 68uF 450V
RC-EZ0141BMZZ
AL
C716
SMD Capacitor, 6.8nF 50V
VCKYTV1HB682K
AA
D724
SMD Zener Diode, 2V4
RH-EX0574BMZZ
AA
D736
Diode, IN4937
RH-DX0579BMZZ
AB
D737
SMD Diode, LL4148
RH-DX0551BMZZ
AA
D739
Zener Diode, 33V
RH-EX0427BMZZ
AA
F701
Fuse, 3.15AH 20mm
QFS-C3226CEZZ
AE
IC1001
Microprocessor (NVM 24C16)
RH-IX1856BMZZ
BA
IC1001
Microprocessor (NVM 24645)
RH-IX1798BMZZ
BA
Q606
SMD Transistor, 2SC2412
VS2SC2412KQ-1
AA
Q701
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q702
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q703
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q713
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q715
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q720
SMD Transistor, 2SC2412
VS2SC2412KQ-1
AA
Q721
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q725
SMD Transistor, BC847
RH-TX0232BMZZ
AA
R705
SMD Resistor, 8.2k 1/10W
VRS-TV1JD822J
AA
R714
Resistor, 0.56R 2W
VRN-VV3LBR56J
AB
R718
Resistor, 10
Ω
0.5W
RR-XZ0212BMZZ
AB
R742
SMD Resistor, 120K
Ω
1%
VRS-TQ2BD124F
AA
R743
SMD Resistor, 120K
Ω
1%
VRS-TQ2BD124F
AA
R744
SMD Resistor, 3.9K
Ω
1%
VRS-TV1JD392J
AA
R745
SMD Resistor, 470K
Ω
1%
VRS-TV1JD473J
AA
R753
SMD Resistor, 22k
Ω
VRS-CY1JF222J
AA
Note that the list of components given above IS NOT a parts list to cure all power related problems in this chassis. It
has been compiled to show all the part numbers for items refered to in this document. If the parts noted in the text are
not faulty, carry out fault finding procedures to locate the problematic part.
has been compiled to show all the part numbers for items refered to in this document. If the parts noted in the text are
not faulty, carry out fault finding procedures to locate the problematic part.
CTV 2004 03 02
Date of Issue: 10
th
November 2004
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 3 of 3
Sharp Electronics (UK) Limited
Reference AvW 10 03 2004 - 2
Revision 4
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
C1013
SMD Capacitor
VCKYTV1CF105Z*
AA
C709
Capacitor, 10
µ
F 50V
VCEAGA1HW106M
AH
C713
Capacitor, 68uF 450V
RC-EZ0141BMZZ
AL
C716
SMD Capacitor, 6.8nF 50V
VCKYTV1HB682K
AA
D724
SMD Zener Diode, 2V4
RH-EX0574BMZZ
AA
D736
Diode, IN4937
RH-DX0579BMZZ
AB
D737
SMD Diode, LL4148
RH-DX0551BMZZ
AA
D739
Zener Diode, 33V
RH-EX0427BMZZ
AA
F701
Fuse, 3.15AH 20mm
QFS-C3226CEZZ
AE
IC1001
Microprocessor (NVM 24C16)
RH-IX1856BMZZ
BA
IC1001
Microprocessor (NVM 24645)
RH-IX1798BMZZ
BA
Q606
SMD Transistor, 2SC2412
VS2SC2412KQ-1
AA
Q701
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q702
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q703
Transistor, 2SK2662
CH-TX0231BMV0
AK
Q713
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q715
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q720
SMD Transistor, 2SC2412
VS2SC2412KQ-1
AA
Q721
SMD Transistor, 2SA1037
VS2SA1037KQ-1
AA
Q725
SMD Transistor, BC847
RH-TX0232BMZZ
AA
R705
SMD Resistor, 8.2k 1/10W
VRS-TV1JD822J
AA
R714
Resistor, 0.56R 2W
VRN-VV3LBR56J
AB
R718
Resistor, 10
Ω
0.5W
RR-XZ0212BMZZ
AB
R742
SMD Resistor, 120K
Ω
1%
VRS-TQ2BD124F
AA
R743
SMD Resistor, 120K
Ω
1%
VRS-TQ2BD124F
AA
R744
SMD Resistor, 3.9K
Ω
1%
VRS-TV1JD392J
AA
R745
SMD Resistor, 470K
Ω
1%
VRS-TV1JD473J
AA
R753
SMD Resistor, 22k
Ω
VRS-CY1JF222J
AA
Note that the list of components given above IS NOT a parts list to cure all power related problems in this chassis. It
has been compiled to show all the part numbers for items refered to in this document. If the parts noted in the text are
not faulty, carry out fault finding procedures to locate the problematic part.
has been compiled to show all the part numbers for items refered to in this document. If the parts noted in the text are
not faulty, carry out fault finding procedures to locate the problematic part.
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