66DS-03H (serv.man15). Intermittent failure of the line output transistor - Sharp TV Technical Bulletin (repair manual)

66ds-03h (serv.man15) technical bulletin
Model
66DS-03H (serv.man15)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
35.1 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Intermittent failure of the line output transistor
File
66ds-03h-sm15.pdf
Date

Read Sharp 66DS-03H (serv.man15) Technical Bulletin online

CTV2001 09 06
Month of Issue:  September 2001
        
Classification: 
White
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
Sharp Electronics (UK) Limited
Reference AVW21092001-2
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
MODELS
59DS03H
59DS05H
66DS03H
66DS05H
66ES03H
66ES05H
SYMPTOM Intermittent failure of the line output transistor.
CAUSE
Various components in the horizontal stage.
ACTION
When it is found that the line output transistor is short circuit, the following
components should be checked and/or replaced:
!  C607 - this capacitor normally goes leaky leading to intermittent failure of the line
output transistor, Q602.
!  D602 and D605 can also cause intermittent failure of Q602, but normally they do
not read faulty.
!  L601 goes open circuit leading to Q602 getting very hot, then failing.  When
checking L601, note that there is a 22R resistor in parallel with it.
!  C613 may go dry jointed as well as the connections to the scan coils (both ends of
the connecting wire). C613 sometimes needs to be replaced.
!  Q601 can cause Q602 to fail.
Please see diagram on next page.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
D602
Diode, 1N4934
RH-DX0504BMZZ
AA
D605
Diode, RGP10D
RH-DX0591BMZZ
AB
L601
Coil, 4.7
µ
H
VP-DF4R7K0000
AB
C607
Capacitor, 330
µ
F 10V
RC-EZ0122BMZZ
AB
C613
Capacitor, 690
η
F 250V Mylar
RC-FZ6684BMNJ
AE
Q601
Transistor, 2SD2153T100/W
RH-TX0146BMZZ
AD
Q602
Transistor, BUH515
RH-TX0144BMZZ
AK
CTV2001 09 06
Month of Issue:  September 2001
        
Classification: 
White
TELEVISION TECHNICAL BULLETIN
Page 2 of 2
Sharp Electronics (UK) Limited
Reference AVW21092001-2
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
Page of 2
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Here you can read online and download Sharp 66DS-03H (serv.man15) Technical Bulletin in PDF. 66DS-03H (serv.man15) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Sharp 66DS-03H (serv.man15) CTR. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.