PRACTICAL SERVICE PRECAUTIONS
IT MAKES SENSE TO AVOID EXPOSURE TO ELECTRICAL SHOCK.
While some sources are
expected to have a possible dangerous impact, others of quite high potential are of limited current and are
sometimes held in less regard.
ALWAYS RESPECT VOLTAGES.
While some may not be dangerous in themselves, they can cause
unexpected reactions – reactions that are best avoided. Before reaching into the powered color TV set, it is
best to test the high voltage insulation. It is easy to do, and is just a good service precaution.
BEFORE POWERING UP THE TV WITH THE BACK OFF
(or on a test fixture), attach a clip lead to
the CRT DAG ground and to a screwdriver blade that has a well insulated handle. After the TV is powered
on and high voltage has developed, probe the anode lead with the blade, starting at the bottom of the High
Voltage Transformer (flyback – IFT). Move the blade to within two inches of the connector of the CRT.
IF
THERE IS AN ARC, YOU FOUND IT THE EASY WAY, WITHOUT GETTING A SHOCK!
If
there is an arc to the screwdriver blade, replace the High Voltage Transformer or the lead, (if removable)
whichever is causing the problem.
PICTURE TUBE REPLACEMENT PROCEDURE
Note: a. Two (2) people are required to handle this picture tube.
b. Safety Glasses must be worn during this procedure or whenever directly handling a picture tube.
c. Take care in each step not to damage the CRT or the cabinet.
1. Remove the Chassis and the CRT Socket Board Module from the cabinet.
2. A furniture pad or blanket should be positioned on the floor to support only the CRT Face. This pad or
blanket should be high enough to keep the CRT Face approximately 12 to 14 inches off the floor.
3. Using two people, place the cabinet in a front down position with the CRT Face on the pad or blanket.
4. Place padded blocks under each corner of the cabinet to keep it from rocking.
5. Remove the four screws, at the corners of the CRT.
6. With two people lowering the cabinet to the floor, leave the CRT elevated by the pad or blanket.
Note: Take care not to grasp the neck of the CRT during this procedure, as it is extremely fragile.
7. Two (2) people may then lift the CRT from the cabinet.
8. Remove the degaussing coil from the defective CRT and mount on the replacement. Take care to
maintain the exact shape and fit.
To install the new CRT, reverse steps 1 to 7.
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Страница 35: ...Figure Service position Mono Carrier ...
Страница 69: ...Power Supply Set Not Working Figure Fault finding tree Set not working ...
Страница 70: ...Set Does Not Start Up Figure Fault finding tree Set does not start up ...
Страница 73: ...Blank Screen Figure Fault finding tree Blank screen ...
Страница 76: ...Picture Ok No Sound Figure Fault finding tree Picture ok no sound ...
Страница 77: ...Unable To Perform Tuning Figure Fault finding tree Unable to perform tuning ...
Страница 80: ...Audio Processing No Sound Figure Fault finding tree No sound ...
Страница 83: ...Hardware Alignments Figure Top view family board ...
Страница 86: ...Software Alignments and Settings Figure Service Mode overview ...
Страница 118: ...Figure Geometry alignments ...
Страница 172: ...All Models 7661 Chassis Overview ...
Страница 173: ...All Models 7661 Power Supply A1 ...
Страница 174: ...All Models 7661 Deflection A2 ...
Страница 175: ...All Models 7661 Tuner IF A3 ...
Страница 176: ...All Models 7661 Hercules A4 ...
Страница 177: ...All Models 7661 Features Connectivities A5 ...
Страница 178: ...All Models 7661 Class D Audio Amplifier A6 ...
Страница 179: ...All Models 7661 Audio Amplifier A7 ...
Страница 180: ...All Models 7661 Rear I O Cinch A8 ...
Страница 181: ...All Models 7661 Front Control A9 ...
Страница 182: ...All Models 7661 DVD Power Supply A10 ...
Страница 183: ...All Models 7661 CRT Panel B1 ...
Страница 184: ...All Models 7661 Eco Scavem B2 ...
Страница 185: ...All Models 7661 Side AV Headphone Panel D ...
Страница 186: ...USED ONLY IN MODELS 25PT6341 85 7661 Side Jack Panel Wide ...
Страница 187: ...NOT USED IN MODELS 25PT6341 85 27MS6341 37 27PT5441 37 32MS6341 37 32PT5441 37 33PT5441 85 7661 Top Control Panel E ...
Страница 188: ...USED ONLY IN MODELS 27MS6341 37 32MS6341 37 7661 Top Control Panel Round ...
Страница 189: ...USED ONLY IN MODELS 26PW6341 37 28PW6341 85 30PW6341 37 32PW6341 85 7661 Linearity Panorama Panel G ...
Страница 190: ...NOT USED IN MODELS 27ST6210 27 7661 LTI CTI Interface Panel H ...
Страница 191: ...NOT USED IN MODELS 25PT6341 85 27PT5441 37 32PT5441 37 33PT5441 85 7661 Front Interface Panel J ...
Страница 192: ...USED ONLY IN MODELS 27ST6210 27 7661 EPS Module ...
Страница 193: ...USED ONLY IN MODELS 27ST6210 27 7661 SP LS Module ...
Страница 194: ...USED ONLY IN MODELS 27ST6210 27 7661 ITV Interface Module ...
Страница 195: ...All Models 7661 Layout Mono Carrier Top Side ...
Страница 196: ...All Models 7661 Layout Mono Carrier Overview Bottom Side ...
Страница 197: ...All Models 7661 Layout CRT Panel Top Side ...
Страница 198: ...All Models 7661 Layout CRT Panel Bottom Side ...
Страница 199: ...All Models 7661 Layout Side AV Headphone Panel Top Side ...
Страница 200: ...All Models 7661 Layout Side AV Headphone Panel Bottom Side ...
Страница 201: ...USED ONLY IN MODELS 25PT6341 85 7661 Side Jack Panel Wide Top Side ...
Страница 202: ...USED ONLY IN MODELS 25PT6341 85 7661 Side Jack Panel Wide Bottom Side ...
Страница 205: ...USED ONLY IN MODELS 27MS6341 37 32MS6341 37 7661 Top Control Panel Round Top Side ...
Страница 206: ...USED ONLY IN MODELS 27MS6341 37 32MS6341 37 7661 Top Control Panel Round Bottom Side ...
Страница 207: ...USED ONLY IN MODELS 26PW6341 37 28PW6341 85 30PW6341 37 32PW6341 85 7661 Layout Linearity Panorama Panel Top Side ...
Страница 208: ...NOT USED IN MODELS 27ST6210 27 7661 Layout LTI CTI Interface Panel Top Side ...
Страница 209: ...NOT USED IN MODELS 27ST6210 27 7661 Layout LTI CTI Interface Panel Bottom Side ...
Страница 210: ...NOT USED IN MODELS 25PT6341 85 27PT5441 37 32PT5441 37 33PT5441 85 7661 Layout Front Interface Panel Top Side ...
Страница 211: ...NOT USED IN MODELS 25PT6341 85 27PT5441 37 32PT5441 37 33PT5441 85 7661 Layout Front Interface Panel Bottom Side ...
Страница 212: ...USED ONLY IN MODELS 27ST6210 27 7661 EPS Module Top Side ...
Страница 213: ...USED ONLY IN MODELS 27ST6210 27 7661 SP LS Module Top Side ...
Страница 214: ...USED ONLY IN MODELS 27ST6210 27 7661 SP LS Module Bottom Side ...
Страница 215: ...USED ONLY IN MODELS 27ST6210 27 7661 ITV Interface Module Top Side ...
Страница 216: ...USED ONLY IN MODELS 27ST6210 27 7661 ITV Interface Module Bottom Side ...
Страница 217: ...All Models 7661 Testpoint Overview Mono Carrier ...
Страница 218: ...All Models 7661 Testpoint Overview CRT ...
Страница 219: ...All Models 7661 Testpoint Overview LTI Panel ...
Страница 220: ...All Models 7661 Wiring Diagram ...
Страница 221: ...All Models 7661 Block Diagram Supply and Deflection ...
Страница 222: ...All Models 7661 Block Diagram Video ...
Страница 223: ...All Models 7661 Block Diagram Audio Control ...
Страница 224: ...All Models 7661 I2C and Supply Voltage Overview ...