Operation Manual

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8-26
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Replacement of PARTS Periodically･････････････････････
The parts shown below, it is need to exchang periodically.
Replacement of Magnetron (V1/V101/V201)･･････････････････
Remove the shield cover of the modulator and check that no charge remains in the
high-voltage modulator circuit. Then, remove the socket of the magnetron. The
magnetron can be demounted by removing the screws fixing it. When mounting a
new magnetron, do not touch the magnet with a screwdriver or put it on an iron place.
After replacement, connect the lead wire correctly.
Handling of Magnetron under Long-Time Storage
The magnetron that has been kept in storage for a long time may cause sparks and
operate unstably when its operation is started. Perform the aging in the following
procedures:
(1) Warm up the cathode for a longer time than usually. (20 to 30 minutes in the
STBY state.)
(2) Start the operation from the short pulse range and shift is gradually to the longer
pulse ranges. If the operation becomes unstable during this process, return it to
the standby mode immediately. Keep the state for 5 to 10 minutes until the
operation is restarted.
(3) After transmission is made for about 15 minutes, conduct the tuning adjustment.
(4) Adjust RV1 within the receiver so that the bar graph of the tuning indicator on the
display reaches the reading 10 without saturation.
Parts Exchange Standard
1. Magnetron 4,000 hours
2. Motor 10,000 hours
3. LCD 50,000 hours
4. Fan Motor 20,000 hours
5. Lithium battery 3 years