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37DT-25H (serv.man27). Common faults on the CA1 Chassis - Sharp TV Technical Bulletin (repair manual)

37dt-25h (serv.man27) technical bulletin
Model
37DT-25H (serv.man27)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
7.56 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Common faults on the CA1 Chassis
File
37dt-25h-sm27.pdf
Date
Next: Sharp 37DT-25H (serv.man28) Technical Bulletin

Read Sharp 37DT-25H (serv.man27) Technical Bulletin online

Sharp Electronics (UK) Limited
Reference AVW150299/1
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
CTV990202
Month of Issue: Febuary 1999
        Classification:                White
TELEVISION TECHNICAL BULLETIN
           Page 1 of 1
MODELS
37DM23H
37DT25H
51DT25H
Common faults on the CA1 Chassis
Fault
Reason
Possible Cause
No teletext
Low video input to pin 30 of IC1001 (should be 2.5V).
Q201 or Q801
Buzz on sound
Noise on audio IF signal or AFT VCO adjustment
incorrect
Q801 or poor adjustment of the AFT
VCO
Erratic start up problems
Noise corrupting operation of IC1001/201
See Technical Bulletin CTV981205
Vertical stage problems
Various component failures.  Note that as the vertical
output stage is DC coupled, a problem at the start of the
stage can have a dramatic effect on the output.
Check all components in the vertical
stage, paying particular attention to
R507/8/22, C510/2/14 and C713
No start up
Power supply failure
Q702 and/or D718 short circuit
Dead set
Power supply running, but no picture and sound
Q704 and/or Q1012
Display

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Here you can read online and download Sharp 37DT-25H (serv.man27) Technical Bulletin in PDF. 37DT-25H (serv.man27) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Sharp 37DT-25H (serv.man27) 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.

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37DT-25H (serv.man27) Service Manuals

Preview DownloadPagesSize
37DT-25H (serv.man2) Start to Page 15 Service Manual 20 2.36 MB
37DT-25H (serv.man3) Pages 16 to 30 Service Manual 15 1.9 MB
37DT-25H (serv.man4) Pages 31 to 51 Service Manual 21 2.4 MB
37DT-25H (serv.man5) Page 52 to end Service Manual 20 1.73 MB
37DT-25H (serv.man6) Circuit diagrams Service Manual 5 721.67 KB
37DT-25H (serv.man7) PWB layouts Service Manual 4 1.07 MB
37DT-25H (serv.man8) NVM map Service Manual 4 164.43 KB
37DT-25H (serv.man9) Adjustment procedures and child lock release details Service Manual 4 152.7 KB
37DT-25H (serv.man11) User Guide / Operation Manual 28 1007.15 KB
37DT-25H (serv.man10) Parts listing Parts Guide 11 672.14 KB
37DT-25H from the Specification 1 19.82 KB
37DT-25H (serv.man16) Change of power supply opto-coupler. Technical Bulletin 1 61.36 KB
37DT-25H (serv.man31) Details of recall notice made in March 1998 Technical Bulletin 2 47.01 KB
37DT-25H (serv.man30) Jittering teletext Technical Bulletin 1 7.84 KB
37DT-25H (serv.man29) Details of hotel mode operation Technical Bulletin 2 11.9 KB
37DT-25H (serv.man28) Data change when replacing the NVM - OSD shift, language and child lock functions Technical Bulletin 1 8.21 KB
37DT-25H (serv.man26) Fitting instructions for Orion type CRT (circuit changes) Technical Bulletin 1 7.84 KB
37DT-25H (serv.man25) Common faults on the CA1 chassis Technical Bulletin 1 19.8 KB
37DT-25H (serv.man24) Countermeasure for no teletext unless in the mix mode Technical Bulletin 1 42.59 KB
37DT-25H (serv.man23) Countermeasure for set not coming out of standby Technical Bulletin 1 90.98 KB
37DT-25H (serv.man22) Countermeasure for height, tuning or video problems at switch on Technical Bulletin 2 79.59 KB
37DT-25H (serv.man21) Countermeasure for whistling power supply during the standby mode Technical Bulletin 1 33.55 KB
37DT-25H (serv.man20) Countermeasure for intermittent noise from SCART connection during standby Technical Bulletin 2 28.18 KB
37DT-25H (serv.man19) Countermeasure for protection of data loss from the NVM during switch on Technical Bulletin 1 22.84 KB
37DT-25H (serv.man18) Countermeasure for intermittent failure of Q401 and Q801 Technical Bulletin 2 26.03 KB
37DT-25H (serv.man17) Countermeasure to cure popping from the loudspeaker during switch on Technical Bulletin 2 17.01 KB
37DT-25H (serv.man15) No sound or picture. Technical Bulletin 1 34.98 KB
37DT-25H (serv.man14) IC201 mask has been updated from 1Y to 2Y. Technical Bulletin 1 42.08 KB
37DT-25H (serv.man13) Vertical collapse and no data on the I2C bus after one minute. Technical Bulletin 1 40.62 KB
37DT-25H (serv.man12) Power supply runs, but it does not turn on Technical Bulletin 1 11.04 KB
37DT-25H (serv.man32) Packaging Weights Data Regulatory Data 1 4.35 KB

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