Before replacing any of these components, read the parts list in this manual carefully. Special safety characteristics are identified in this manual and its supplement electrical components having such features are shaded or marked by on the schematic diagram and the parts list. These characteristics are often passed unnoticed by a visual inspection. Many electrical and mechanical parts in the chassis have special safety-related characteristics. When replacing high-power resistor, keep the resistor 10 mm away from the circuit board. Disconnect the power cord before replacing parts.ĭ. Always discharge the graphite layer conductor when moving the CRT. 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.ī. 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.Ī. The CRT of this TV set have gotten the approval of safety authentication inspection. * Keep the main power voltage at 120V when checking the high voltage.ġ.1.2 The primary source of X-RAY RADIATION is the CRT. When servicing, please refer to the HIGH VOLTAGE CHECK procedure this service manual before check the high voltage and the high voltage meter should be reliable and accurate. And it should not exceed 28kV in any condition. The high voltage of zero beam current(brightness, contrast and color is min) should be within 27kV on condition that the main power (B+) voltage is AC120V. To avoid this radiation hazard, the high voltage should fall within the limitation. Before servicing the unit, please read the following items carefully.ġ.1.1 Excessive voltage will cause harmful X-ray.

Note: This service manual is only for professional service personnel’s reference.

Jensen ts2050j service manual