Read Panasonic TX-21PM30T Service Manual online
Receiving Channels :
28-69 (PAL B AUST)
13-62 (NTSC M JAPAN)
33.6 MHz (SECAM)
32.5 MHz (B,G)
33.75 MHz (SECAM)
34.42 MHz (NTSC)
general public. It does not contain warning cautions to advise non-technical individuals of potential dangers in
attempting to service a product. Product powered by electricity should be serviced or repaired only by
experienced professional technicians. Any attempt to service or repair the product or products dealt with in this
service literature by anyone else could result in serious injury or death.
2. When servicing, observe the original lead dress, especially the lead dress in the high voltage circuits. If
should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when
working on high voltage equipment. Always discharge the anode of the picture tube to the receiver
chassis before handling the tube.
After servicing make the following leakage current checks to prevent the customer from being exposed
to shock hazards.
2. Turn on the receiver’s power switch.
lic cabinet part on the receiver, such as screw heads, aerials, connectors, control shafts, ect. When the
exposed metallic part has a return path to the chassis, the reading should be between 4 Mohm and 20
Mohm.When the exposed metal does not have a return path to the chassis, the reading must be infinite.
2. Check a 2 kohm non-inductive resistor and an AC/DC current meter, in series with each exposed
The current from any point should not exceed 0.7 mA peak AC or 2mA DC. In the case of a measure-
ment being outside of these limits specified, there is a possibility of a shock hazard, and the receiver
should be repaired and rechecked before it is returned to the customer.
service, ensure that jig is capable of handling 28.0kV without causing X-Radiation. Note: It is important to use an accurate
periodically calibrated high voltage meter.