76GF-63 (serv.man4) — Sharp TV Service Manual (repair manual)

Model
76GF-63 (serv.man4)
Pages
44
Size
3.9 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / CTR
File
76gf-63-sm4.pdf
Date

View Sharp 76GF-63 (serv.man4) Service Manual online

1
76GF-63H
      MODEL 
 76GF-63H
SHARP  CORPORATION
CONTENTS
 PAL I 
  
SYSTEM COLOUR TELEVISION
SE
00
76GF63H00
DA-50W
 CHASSIS
SERVICE MANUAL
In the interests of user safety (required by safety
regulations in some countries) the set should restored
to its original condition and only parts identical to
those specified should be used.
                  Issued:  11th  Jan  2002
LOCATION PARTS.........................................17
SCHEMATIC DIAGRAM.................................23
BLOCK DIAGRAM..........................................32
PART LIST......................................................33
ELECTRICAL SPECIFICATION.......................3
IMPORTANT SERVICE NOTES.......................4
SERVICE ADJUSTEMENTS............................5
PRINTED WIRING BOARDS..........................10
2
76GF-63H
Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc.
If only part  number changes are required, just change part number directly the part number in the Parts Listing Section.
If you need more information, please refer to the Technical Report (Bulletin).
SERVICE MANUAL UPDATE LOG SHEET
Part No.
Technical Report  No.
Technical Bulletin No.
Cause / Solution
Page No.
Application
Data /Serial No.
3
76GF-63H
ELECTRICAL SPECIFICATIONS
Power Input .......................220V-240 Volts AC 50Hz
Power Consumption
Audio Power Output Rating
Speakers
Left / Right........................................ 6 x 12cm
Centre.............................................. 6 x 12cm
Aerial Input Impedance
Tuning Ranges..............45.75MHz thru 855.25 MHz
Intermediate frequency.............................
.38.9MHz
Adjacent  Sound Carrier Trap
..................40.9MHz
Sound  Carrier Trap 
...............................32.9MHz
VHF/UHF...........................75 ohm Unbalanced
CATV Special Channels
Normal Operating..................................105W
Stand-by Operating.............................. ..1.3W
Internal Left Speaker.....................10W (MPO)
Internal Right Speaker..................10W (MPO)
Internal   Centre   Speaker...........10W (MPO)
White Level
Set brightness control to get total picture tube cathode current of 600 milliamperes under no signal condition.
Maximum necessary correction of each picture tube cathode current to get 8900 degrees K-20 MPCD screen
temperature should not exceed 15% of its original value.
X=0.290               Y=0.284
WARNING
The chassis in this receiver is partially hot. Use an isolation transformer between the line
cord plug and power receptable, when servicing this chassis.
To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer
servicing to qualified sercice personnel.
Convergence.........................Self Converging System
Focus....................................Bi-Potencial Electrostatic
Sweep Deflection...........................................Magnetic
Adjacent  Picture  Carrier Trap
................30.9MHz
Specifictions are subject to change without prior notice.
4
76GF-63H
IMPORTANT SERVICING NOTES
Only qualified service personnel are allowed to carry out maintenance and repair of this receiver.
SERVICING OF HIGH VOLTAGE SYSTEM AND CRT
It is important that the static charge is removed from the high voltage system when carrying out work
on the receiver. This can be achieved by connecting a 10K resistor (with a suitably insulated lead) from
the CRT cavity connector to the CRT ground tag. This must be carried out with the AC supply discon-
nected from the receiver.
Note the following:
 The CRT in this receiver employs Integral Implosion Protection.
 If the CRT has to  be changed  it  MUST  be  replaced  with  the  correct  type for continued safe
working
 DO NOT lift the CRT by its neck.
 When handing the CRT, ensure that shatterproof goggles are worn.
 Ensure that the CRT is discharge before handling.
X-RAY
This receiver is designed to keep any x-ray emission to an absolute minimum. Some fault conditions
and servicing procedures may produce potentially hazardous x-ray radiation levels. This is a problem
when in close proximity to the receiver for long  periods of time. To reduce any risks associated with
this, please observe the following precautions:
1. When undertaking any servicing on this chassis, DO NOT increase the EHT  to more than 33 KV,
   (at a instantaneous beam current of 1600
µΑ).
2. Ensure that during normal operation the EHT does not exceed 32KV
±
1KV (at a beam current of
   1600
µΑ). 
This level has been preset in the factory. Always check that this level has not been ex-
ceeded
   after carrying out any repair on the receiver..
3. DO NOT replace the CRT with any other type than that specified in the parts listing as this may
   cause excessive x-ray radiation.
BEFORE RETURNING THE RECEIVER TO THE CUSTOMER
In addition to the above checks, the following should also be carried out before  returning the receiver
to the customer.
1. Inspect all the leads to ensure that they are dressed correctly and that they are not obstructed or
    pinched by any other parts.
2. Ensure that all protective devices are in good condition. These will include nonmetallic control
   knobs, insulating fish papers, cabinets backs, compartment covers or shields, mechanical insulators,
    etc.
Page of 44

Download Sharp 76GF-63 (serv.man4) Service Manual (Repair Manual)

Here you can view online or download Sharp 76GF-63 (serv.man4) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp 76GF-63 (serv.man4) CTR. Information contained in Sharp 76GF-63 (serv.man4) 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).