COLOR TELEVISION Manual
Description
COLOR TELEVISION
T S 2 750J ( TK2 750)
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CONTENTS Safety instruction ……………………………………………………………………… 1 General instruction ……………………………………………………………………….
1 Alignment instruction …………………………………………………………………… 2 Alignment f low .
.
……………………… ……………………… …………………….
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2 Alignment m ethod………………………………………………………………….
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3 BLOCK DIAGRAM ……………………………………………………………………….
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8 MAIN IC ……………………………………………………………………………….
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9 Exploded view……………………………………………………………….
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13 Part list …………………….
………………………………………………15 Schematic diagram ………………………………………………………………….
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32
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Note: This service manual is only for professional service personnel’s reference.
Before servicing the unit, please read the following items carefully.
1 safety instruction
1.
1 X-RAY radiation precaution 1.
1.
1 Excessive voltage will cause harmful X-ray.
To avoid this radiation hazard, the high voltage should fall within the limitation.
The appliance works at AC 120V, 60Hz.
The high voltage of zero beam current should be within 29.
0kV on condition that the main power (B+) voltage is AC135V.
And it should not exceed 30kV in any condition.
* Keep the main power voltage at 135V when checking the high voltage.
1.
1.
2 The primary source of X-RAY RADIATION is the CRT.
The CRT of this TV set have gotten the approval of safety authentication inspection.
The replacement CRT should be exactly the same type and specification CRT which has gotten a similar safety approval, and check the high voltage according to the HIGH VOLTAGE CHECK procedure.
1.
2 safety precaution a.
Since the power supply circuit of this receiver is directly connected to the AC power line, an isolation transformer is necessary during dynamic service to avoid possible shock hazard.
b.
Always discharge the graphite layer conductor when moving the CRT.
c.
Disconnect the power cord before replacing parts.
d.
When replacing high-power resistor, keep the resistor 10 mm away from the circuit board.
1.
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