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TROUBLE
'COMMON
CAUSE
REMEDY
1. No power output
1) Relay will not activate.
2) Relay is activated.
b. HV meter will not swing, no Ip
(plate current), cooling fan
inoperative.
c. Ip, RF meter swings off scale,
d. Ip will not change.
a, Exciter RF meter swings off scale.
a. Control cable disconnected.
b. Power supply protector in lock due
to temperature rise from extended
transmi:
"
c. LINEAR switch at STBY
D. ALC and RL plugs reversed.
Defective coaxial cable connection.
Interlock switch not depressed due to
faulty upper case cover installation.
Antenna coaxial cable disconnected.
RF INPUT and RF OUTPUT coaxial
connectors reversed.
'Secure control cable.
Allow standby for approximately 15 minutes
with power switch on for forced air cooling,
Refer to Section 4.7.
Turn switch to OPERATE.
Correct reversed cables.
Correct connection.
Correct upper case cover installation.
Refer to Section 2.2.3.
Correct connection.
Correct reversed cables.
2. Output power too low.
1) Ip (plate current) below 400mA .
2) Hv (plate voltage) in max. drive
state below 1.5kV for CW and below
2kV for SSB.
a.
Low exciter output
Improper setting ALC ADJ control
c. Different positions of BAND switches
between exciter and TL-922A.
s
Low line voltage.
Readjust exciter
Readjust control. Refer to Section 4.5.
Set both BAND switches to same position.
Improve line regulation (refer to
Section 2.4).
3. RF meter swing too hi or low
Improper RF control setting.
Adjust RF control until RF meter reads
Approximately 7 on scale. Refer to Section 4.6,
4, Fuse blows when POWER switch is
turned "ON".
Inside shield plate incorrectly installed
causing interlock switch to short high
voltage line to ground.
Reinstall inside shield plate and replace fuse,
Refer to Section 2.2.2.
5. Upper case over high voltage trans-
former too hot.
Line voltage change terminal cover on
rear removed or ajar.
Replace cover securely.
16
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