66FW-54H (serv.man42). Fault finding flow charts for the DA100 (50Hz) chassis — Sharp TV Technical Bulletin (repair manual)

Model
66FW-54H (serv.man42)
Pages
3 Few pages! See other manuals at the bottom of the first or last page.
Size
47.22 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Fault finding flow charts for the DA100 (50Hz) chassis
File
66fw-54h-sm42.pdf
Date

View Sharp 66FW-54H (serv.man42) Technical Bulletin online

CTV2001 05 03
Month of Issue:  
May 2001
        
Classification: 
White
TELEVISION TECHNICAL BULLETIN 
Page 1 of 3
Sharp Electronics (UK) Limited
Reference AVW30042001-1
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
MODELS
56FW53H
66FW53H
66FW54H
76FW53H
76FW54H
59ESD7H
66ESD7H
Please find fault finding flow charts on the following two pages.
Neon
illuminated
NICAM or OPC
LED's illuminated
Plug or Internal fuse has failed
 Check Bridge Rectifier,Q701, Q702,
Q703 and D712
Plug or Internal fuse has failed
 Check Bridge Rectifier,Q701, Q702,
Q703 and D712
No
Short Circuit
Check HT
(D720 Cathode)
No
Yes
Power supply is working correctly
check data communication
(see LED's Fault code table)
Power supply is working correctly
check data communication
(see LED's Fault code table)
No
Short circuit on a supply other
than the main HT
Short circuit on a supply other
than the main HT
line Drive Missing
go to chart 2
line Drive Missing
go to chart 2
140v
Between 20 And 40 Volts
Zero
Press CH+ button
on main PWB
Remove R623
No
Yes
CTV not faulty
standby mode
CTV not faulty
standby mode
Protection circuit operating
Check IC1001 pin 95
(5v = Normal\zero= standby)
Protection circuit operating
Check IC1001 pin 95
(5v = Normal\zero= standby)
Power supply in standby mode
check IC702
Power supply in standby mode
check IC702
Power Supply Starts
No Change
Power Supply Starts
For A Few Seconds Only
Chart 1 -  No 140v rail
Before switching on ensure that the aerial is not connected
IC702
pin15 = 0v
HT has increased
replace IC705 and check
associated components
HT has increased
replace IC705 and check
associated components
Power Supply not working
Replace R713 and R714
check D712, Q702 and Q703
Power Supply not working
Replace R713 and R714
check D712, Q702 and Q703
Yes
Note:
An avalanche diode has been
added across C720
Back to top
DA50 Chassis
Fl
Sharp Electronics (UK) Ltd
NICAM or OPC
LED's illuminated
No
Reduced Vertical Scan
Increase
Screen control
Yes
Power supply is working correctly
check data communication
(see LED's Fault code table)
Power supply is working correctly
check data communication
(see LED's Fault code table)
No Video
Check Video input selection
 and IF stage
No Video
Check Video input selection
 and IF stage
Correct
Waveform
Yes
Line Drive Fault
Check Q607 (crow bar)
and IC801
Line Drive Fault
Check Q607 (crow bar)
and IC801
EHT Protection circuit operating
Check D617 and amplitude of the line fly-back pulse
EHT Protection circuit operating
Check D617 and amplitude of the line fly-back pulse
Less Than1.8v
More Than 1.8v
Chart 2 -  140v rail Present
Before switching on ensure that the aerial is disconnected
Vertical Output Fault
Ensure IC501 pin 12 = 5v
Check IC501 +/- supply
Vertical Output Fault
Ensure IC501 pin 12 = 5v
Check IC501 +/- supply
Vertical Flyback fault
Check R530,Q502,Q503,Q507
and D507
Vertical Flyback fault
Check R530,Q502,Q503,Q507
and D507
Yes
Check
 Line drive
IC801 pin 50
Check
OSD
Check
 IC801 pin 12
Check
IC801 pin 11
(see waveform)
Incorrect
Waveform
No Vertical Scan
No
No
Check
IC1801 pin 2
12v
No LT supply to RGB output
Q902 and associated
components
No LT supply to RGB output
Q902 and associated
components
Low
RGB output Fault
Check IC801
RGB output Fault
Check IC801
Back to top
DA50 Chassis
Fl
Sharp Electronics (UK) Ltd
Page of 3

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Here you can view online or download Sharp 66FW-54H (serv.man42) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp 66FW-54H (serv.man42) CTR. Information contained in Sharp 66FW-54H (serv.man42) 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).