66CS-03H (serv.man26). Common faults on the CS chassis — Sharp TV Technical Bulletin (repair manual)

Model
66CS-03H (serv.man26)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
24.21 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Common faults on the CS chassis
File
66cs-03h-sm26.pdf
Date

View Sharp 66CS-03H (serv.man26) Technical Bulletin online

Sharp Electronics (UK) Limited
Originator AvW   Supervisor                        Approval Date    /   /     Reference AVW120199/2
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
CTV990113
Month of Issue: January 1998
        Classification:               White
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
MODELS
51CS03H
51CS05H
59CS03H
59CS05H
59CSD8H
66CS03H
66CS05H
66CSD8H
Symptom
Possible Remedy
Dead no sound or vision)
Q701 & Q601 failed                                                     *
D609,  D610,  D720,  D718,  Q702,  Q703,  C601,  C604,
C619, C714, C708, R706, R707, R720 and inspect scan
coils and scan coil socket for bad connections.
Q601 failed
D609, D610, C601, C604, C619 and inspect scan
coils/scan coil socket for bad connections.
Q601 s/c and failure of audio o/p stage
Q601  failed  due  to  missing - 16V rail (supply to o/p
stage). Leave Q601 out of circuit until you have
confirmed that both the +16V and the -16V rails are
correct.
No voltage at Q701 drain
Technical Bulletin CTV970201 (Issued Feb 97)
NICAM LED on or flashing (aerial disconnected)
See flowchart on page 2
HT rail present, no line drive, NICAM LED switches on for
3-6 seconds then goes off (ariel disconnected)
Check R611 and IC201
Keeps switching to standby
Check audio output stage for a short circuit
HT rail missing-unsolder pin 2 of
LOPTX and measure the HT rail
0V                              Power supply not running (check CTV is not in
                                  standby mode
20V-40V                     Short on one of the secondary LT supply rails e.g.
                                   audio o/p stage
110V-150V                 Short circuit on line o/p stage
Line drive pulsating
IC401 not communicating with micro
Line drive pulsating and R628 (R634 in later
Q704 (low standby/sound 5V rail)
models) burning
Slow start up i.e. more than 3-6 seconds for
line oscillator to start depending on model
C714  (please ensure that this is replaced with the
specified part)
Audio Problems
Intermittent sound
Technical Bulletin CTV970203 or CTV980204
Whistle on the Audio (later models only)
Damage print feeding 40V to R368
Distorted sound
IC301 (MSP3410)
Vertical O/P Stage Faults
No or intermittent vertical output
Technical Bulletin CTV970207 (Issued Feb 97)
Failure of vertical output stage
Technical  Bulletin  CTV970202  (Issued Feb 97)  &
check Q507/8/9
Intermittent frame cramping
Replace D501, D502, D507, D512, C506 & C507
Rainbow effect (no line pulses at IC501 pin 2)
C501
Rainbow effect and R628 (R634 in later models) open
circuit
R631 or R632 fusible resistors
Sharp Electronics (UK) Limited
Originator AvW   Supervisor                        Approval Date    /   /     Reference AVW120199/2
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
CTV990113
Month of Issue: January 1998
        Classification:               White
TELEVISION TECHNICAL BULLETIN
Page 2 of 2
Symptom
                                               
         Possible Remedy
Other Problems
East West correction
Check D605, D612, D619, D621 & R628 (R634 in
later models)
Blank raster and flyback lines when hot
Technical Bulletin CTV970204 (issued Feb 97)
Blank raster ( no sandcastle pulse)
D602
Tuner drift
Technical Bulletin CTV970806 (Issued Feb 97)
Notes
1.
D609 & D610 may not read faulty.
2.
Q601, IC201 & C601 are different devices in the 51cm than the larger models.
3.
Before replacing IC201 ensure that 8V is present on all three supply pins (22,23 & 53)
4.
The value of R706 in the 59CS05 & 66CS05 models is 0.33ohm.
5.
CTV must be tuned to CH69 and receiving a signal before the IF PLL (ACF) is carried out.
6.
For alternative 45V and Audio Mute circuits (??CS)3H models only) refer to ??CSO5H service manual.
7. 
Some exchange PWB will have a single 4 pin socket instead of two 2 pin sockets for the loudspeaker
connections. Carefully trim the two 2 pin plug to enable them to fit into the single 4 pin socket.
* These parts except for R707 & R720 are available as a kit.
   Part numbers are:
51 cm models
51 CSCHASSISKIT
59/66cm models
59 CSCHASSISKIT
Page of 2
Display

Download Sharp 66CS-03H (serv.man26) Technical Bulletin

Here you can view online or download Sharp 66CS-03H (serv.man26) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp 66CS-03H (serv.man26) CTR. Information contained in Sharp 66CS-03H (serv.man26) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).