Panasonic TX-21PM30T, Service Manual

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Fig. 1
1.4. X-Radiation
Warning :
The potential sources of X-Radiation in TV set are the EHT section and the picture tube. When using a picture tube test jig for
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.
1. Set the brightness to minimum.
2. Use the remocon to get into Service Mode.
3. Measure the EHT. The meter reading should indicate 27.0(±1.0)kV. If the meter indication is out of tolerance, immediate service
and correction is required to prevent the possibility of premature component failure.
4. To prevent the possibility X-Radiation, it is essential to use the specifield picture tube, if service replacement becomes
necessary.
1.5. MX-7 Chassis Block Diagram
3
TX-21PM30T
TUNER
SAW
AUDIO
EAR
PHONE
SPEAKER
V OUT
DY
H OUT
FBT
SCREEN
FOCUS
RGB
IC601
EHT
CRT
TONE
EW
CIRCUIT
SIF
TRAP
POWER
SAW
FM DEMOD.
( Z - BOARD ).