DV-6635H (serv.man15). Common faults on the BCTV-A Chassis - Sharp TV Technical Bulletin (repair manual)

dv-6635h (serv.man15) technical bulletin
Model
DV-6635H (serv.man15)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
8.23 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Common faults on the BCTV-A Chassis
File
dv-6635h-sm15.pdf
Date

Read Sharp DV-6635H (serv.man15) Technical Bulletin online

Sharp Electronics (UK) Limited
Reference AVW280499/1
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
CTV990501
Month of Issue: May 1999
        Classification:          White
TELEVISION TECHNICAL BULLETIN
 
Page 1 of 1
MODELS
DV5932H
DV5935H
DV5937H
DV6635H
66AS06H
Common faults on the BCTV-A Chassis
Fault
Reason
Possible Cause
Intermittent tripping
Poor line drive signal
Q606
Tripping every five seconds
Teletext processor supply pin
leaky to ground
Teletext processor (note that removing the teletext
PWB will also result in tripping every five seconds)
Intermittent start up
Blank picture or intermittent blank
picture
Data problems
D708 (may not read faulty), NVM (IC104) and/or
EPROM (IC100)
Intermittent start up
Supply slow to come up
R735 - in some early chassis two resistors (in
parallel) where fitted in series with D708, remove
these and replace with a SOC2500 fuse (2.5A)
Tripping
Power supply slow to start
C702 and/or C712 dry jointed
Intermittent sound (Single chip
NICAM PWB)
Erractic crystal oscillation
Change crystal and remove C1330 and C1331
Poor or no east/west correction
L604 short circuit
L604
Dead set
Line stage problems
Check C619 and associated components
Dry joints on the scan coil connectors (both ends)
Note that the NVM (IC104) and EPROM (IC100) are different depending upon the type of NICAM PWB fitted.  Please
order the correct IC for the correct set, otherwise the receiver may fail to operate.
If you have a fault to add to the above list, please do no hesitate to contact Sharp Technical Support via the Hot Line
telephone number.
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Here you can read online and download Sharp DV-6635H (serv.man15) Technical Bulletin in PDF. DV-6635H (serv.man15) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Sharp DV-6635H (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.