DOWNLOAD Sharp 51DT-25H (serv.man19) Service Manual ↓ Size: 26.03 KB | Pages: 2 in PDF or view online for FREE

Model
51DT-25H (serv.man19)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
26.03 KB
Type
PDF
Document
Service Manual / Technical Bulletin
Brand
Device
TV / CTR / Countermeasure for intermittent failure of Q401 and Q801
File
51dt-25h-sm19.pdf
Date

Sharp 51DT-25H (serv.man19) Service Manual / Technical Bulletin ▷ View online

Sharp Electronics (UK) Limited
Originator AvW   Supervisor                        Approval Date    /   /     Reference BW 100898
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV980803
Month of Issue: August 1998
        Classification:               White
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
MODELS
37DM23H
37DT25H
51D25H
SYMPTOM Transistors Q401 and Q801 may be damaged by intermittent electrostatic discharges
from the CRT.  This normally results in a blank raster (no video).
CAUSE
Excessive voltages generated across the base-emitter junction of Q401 and/or Q801.
ACTION
Fit diodes across the base-emitter junctions of Q401 and Q801 as shown in the
diagrams below.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
D411
Didoe, 1N4148
RH-DX0045BMZZ
AA
D412
Diode, 1N4148
RH-DX0045BMZZ
AA
          CF301    L202   D411
           Q401    D412       C420
Location of Components on the Component side of the PWB
Sharp Electronics (UK) Limited
Originator AvW   Supervisor                        Approval Date    /   /     Reference BW 100898
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
  CTV980803
Month of Issue: August 1998
        Classification:               White
TELEVISION TECHNICAL BULLETIN
Page 2 of 2
                                            E
                                              Q401
                                             B
        D412                           C
                                     R408
                      R407
                              Q401
                         R407                 D412
                                                  R408
                                        E
                    E
            
C                                   D411
                                     B
                       Q801
                              Q801
                            D411
Physical Location of New Diodes and Modified Circuits
Display

Sharp 51DT-25H (serv.man19) Service Manual / Technical Bulletin ▷ Download

  • DOWNLOAD Sharp 51DT-25H (serv.man19) Service Manual ↓ Size: 26.03 KB | Pages: 2 in PDF or view online for FREE
  • Here you can View online or download the Service Manual / Technical Bulletin for the Sharp 51DT-25H (serv.man19) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp 51DT-25H (serv.man19) CTR. Information contained in Sharp 51DT-25H (serv.man19) Service Manual / Technical Bulletin (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.