Read Sharp 66GS-62 (serv.man5) Service Manual online
1
66GS-62H
MODEL
66GS-62H
S
SHARP CORPORATION
PAL I
SYSTEM COLOUR TELEVISION
SE
SG
66GS62H00
SERVICE MANUAL
Issued: 4th April ‘01
GA-10
CHASSIS
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.
regulations in some countries) the set should restored
to its original condition and only parts identical to
those specified should be used.
ADJUSTMENTS PROCEDURES......................7
STEREO LED FLASHING CODES..................11 PARTS LISTING..............................................38
CONTENTS
ELECTRICAL SPECIFICATION........................3
IMPORTANT SERVICE NOTES........................4
CONTROL & TERMINALS.................................5
SCHEMATIC DIAGRAM..................................31
PRINTED WIRING BOARDS..........................12
PACKING OF THE SET & ACCESSORIES....46
CHASSIS LAYOUT...........................................20
ICs ADITIONAL INFORMATION.....................21
COMPONENT LOCATION TABLES................16
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66GS-62H
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).
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.
Technical Bulletin No.
Cause / Solution
Page No.
Application
Data /Serial No.
Data /Serial No.
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66GS-62H
ELECTRICAL SPECIFICATIONS
•Focus ....................... High Bi-Potential Electrostatic
•Sweep Deflection ..................................... Magnetic
•Picture Intermediate frequency................... 38.9MHz
•Sound Carrier Trap................................... 32.9MHz
•Adjacent Sound Carrier Trap ................... 40.9MHz
•Adjacent Picture Carrier Trap.................. 30.9MHz
.
•Aerial Input Impedance
VHF/UHF ...................... 75 ohm Unbalanced
•Tuning Ranges........... 45.75 MHz thru 855.25 MHz
VHF: IR A-J
S1-S41 CH (Hiperband)
UHF: E21-E69 CH
S1-S41 CH (Hiperband)
UHF: E21-E69 CH
•White Level
Set brightness control to get total picture tube cathode current of 600 milliammeter under no signal
condition. Maximum necessary correction of each picture tube cathode current to get 8900 de-
grees
condition. Maximum necessary correction of each picture tube cathode current to get 8900 de-
grees
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 receptacle, when servicing this chassis.
To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to
qualified service personnel.
and power receptacle, when servicing this chassis.
To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to
qualified service personnel.
Specifications are subject to change without prior notice.
•Power Input .................... 220V-240 Volts AC 50Hz
•Power Consumption
Normal Operation ...................................87W
Stand-by Operation ..................................3W
Stand-by Operation ..................................3W
•Audio Power Output Rating (MPO) / Impedance
Internal Left Speaker ...................... 10W, 7
Ω
Internal Right Speaker .................... 10W, 7
Ω
•Speakers
Left / Right ...................................... 12 x 6cm
•Convergence
Static (Centre) ........ between any two colours
Dynamic ..................... after static equals zero
Dynamic ..................... after static equals zero
66GS-62H: UK., IRELAND
66GS-62HS: UK. Silver.
66GS-62HS: UK. Silver.
MODEL DESTINATION & DIFFERENCES:
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66GS-62H
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:
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:
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 29.9 KV,
(at a instantaneous beam current of 1300
(at a instantaneous beam current of 1300
µΑ).
2. Ensure that during normal operation the EHT does not exceed 27KV
±
1.5KV (at a beam current of
1000
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.
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.
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.
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.
