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76DW-18H (serv.man36). Counter measure for poor teletext performance - Sharp TV Technical Bulletin (repair manual)

76dw-18h (serv.man36) technical bulletin
Model
76DW-18H (serv.man36)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
8.19 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Counter measure for poor teletext performance
File
76dw-18h-sm36.pdf
Date
Next: Sharp 76DW-18H (serv.man37) Technical Bulletin

Read Sharp 76DW-18H (serv.man36) Technical Bulletin online

Sharp Electronics (UK) Limited
Originator AvW   Supervisor                        Approval Date    /   /     Reference SP84300X
Revision  2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV990105
Month of Issue: January 1999
        Classification:                White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
66DW18H
76DW18H
SYMPTOM Poor teletext performance.
CAUSE
Poor video signal level into the teletext decoder and errors in the EPROM data.
ACTION
Carry out the following circuit change.
1.  Change R447 (connected to pin 9 of IC401) with a 0R jumper.
2.  Change the EPROM (IC1004) with the one listed below.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
IC1004
EPROM, 66DW18H
CH-IX1642CJH0
AZ
IC1004
EPROM, 76DW18H
CH-IX1642CJH1
AX
R447
SMD resistor, 0R
VRS-TV1JD000J
AA
Display

Download Sharp 76DW-18H (serv.man36) Technical Bulletin

Here you can read online and download Sharp 76DW-18H (serv.man36) Technical Bulletin in PDF. 76DW-18H (serv.man36) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Sharp 76DW-18H (serv.man36) 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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76DW-18H (serv.man36) Service Manuals

Preview DownloadPagesSize
76DW-18H (serv.man2) Fault finding guide Service Manual 13 333.82 KB
76DW-18H (serv.man3) Revision 1 Service Manual 35 190.73 KB
76DW-18H (serv.man4) Main circuit diagram Service Manual 3 550.09 KB
76DW-18H (serv.man5) Front cover Service Manual 1 31.84 KB
76DW-18H (serv.man6) Other PWB layouts Service Manual 7 1.91 MB
76DW-18H (serv.man7) Other circuit diagrams Service Manual 6 826.21 KB
76DW-18H (serv.man8) Notes on the circuit diagram Service Manual 1 94.63 KB
76DW-18H (serv.man9) Main PWB layout Service Manual 4 2 MB
76DW-18H (serv.man10) Dolby surround unit circuit diagram Service Manual 3 597.38 KB
76DW-18H (serv.man11) Block diagrams Service Manual 2 313.46 KB
76DW-18H (serv.man12) Adjustment procedures Service Manual 5 250.62 KB
76DW-18H (serv.man13) 100Hz unit circuit diagram (first generation) Service Manual 3 715.08 KB
76DW-18H (serv.man16) Page 25 to end User Guide / Operation Manual 26 943.49 KB
76DW-18H (serv.man15) Front cover to page 24 User Guide / Operation Manual 26 1.16 MB
76DW-18H (serv.man40) NVM data Firmware 981 B
76DW-18H (serv.man14) Parts listing Parts Guide 19 2.02 MB
76DW-18H from the Specification 1 32.11 KB
76DW-18H (serv.man28) D731 and D732 part change during manufacture. Technical Bulletin 1 115.84 KB
76DW-18H (serv.man38) Counter measure for loss of sync while in the RGB mode. Technical Bulletin 1 6.58 KB
76DW-18H (serv.man37) Counter measure for loss of colour or sync while in the NTSC mode Technical Bulletin 1 7.94 KB
76DW-18H (serv.man35) Counter measure for displacement of the RGB picture Technical Bulletin 1 7.71 KB
76DW-18H (serv.man34) Counter measure for blank raster Technical Bulletin 1 278.96 KB
76DW-18H (serv.man33) Counter measure for failure of the bridge rectifier diodes (D701, D702, D703 and D704). Technical Bulletin 1 68.69 KB
76DW-18H (serv.man32) Faults on the 100Hz PWB Technical Bulletin 1 23.24 KB
76DW-18H (serv.man31) Correction to the line output transformer circuit diagram Technical Bulletin 1 22.06 KB
76DW-18H (serv.man30) Part numbers for external speakers. Technical Bulletin 1 38.32 KB
76DW-18H (serv.man29) Change of power supply opto-coupler. Technical Bulletin 1 61.36 KB
76DW-18H (serv.man27) Intermittent failure of the line output transistor. Line output transistor becoming excessively hot. Technical Bulletin 1 21.65 KB
76DW-18H (serv.man26) Failure of Q509. Technical Bulletin 1 60.04 KB
76DW-18H (serv.man25) Low contrast, poor picture. Technical Bulletin 1 21.04 KB
76DW-18H (serv.man24) Dead set, chopper transistor short circuit. Technical Bulletin 1 43.74 KB
76DW-18H (serv.man23) Fault in the vertical stage. Technical Bulletin 1 45.73 KB
76DW-18H (serv.man22) Intermittent failure of the line output transistor. Technical Bulletin 1 40.23 KB
76DW-18H (serv.man21) Opto coupler soldering temperature. Technical Bulletin 1 54.39 KB
76DW-18H (serv.man20) Common faults on the CW100 chassis. Technical Bulletin 3 67.98 KB
76DW-18H (serv.man19) Blank raster, no teletext, OSD or sound Technical Bulletin 1 10.88 KB
76DW-18H (serv.man18) Failure of the vertical and or horizontal output stage Technical Bulletin 1 11.3 KB
76DW-18H (serv.man17) NVM programming Jig (revision-9) Technical Bulletin 3 98.4 KB
76DW-18H (serv.man39) Packaging Weights Data Regulatory Data 1 4.36 KB

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