AMERITRON AL-80 - Troubleshooting Chart

TROUBLE-
■ S HO O T I N G CHART
PROBLEM CHECK
No dial light, H.V. or fan
Outlet dead, fuse, plug (if
changed). Jumper wire con¬
nections on the 120/240 con¬
nection block. Interlock
switch, OFF-ON Switch.
2700 V O.K. but no dial
light and will not key when
jack is grounded
Problem is in +12V supply,
check solder connections on
yellow XFMR leads, ground
screws on PS board should be
tight. D-ll, 013
No operation, fuse blows
Shorted rectifiers, HV short,
defective tube
No 2700V, no Ip when keyed
fuse O.K., dial light O.K.
Open filter capacitor C open
on power supply board
Relay won't key and XMIT
light not lit.
Check transceiver relay and
wiring. Check XMIT relay
jack connection and S4
Meter pins backwards on Ig
HV short or open meter shunt
(R2)
Ip idle current on standby.
Ip backwards deflection
Filament to ground short,
socket, tube
No drive, transceive SWR high
No power (+12V) to FP-108
RL-1, QSK module, coax.
No output, won't load, but
drive appears normal
RL-1, QSK module, output
coax, tank lead dress
No transceiver output, trans¬
ceiver O.K, without amplifier on.
ALC too high, try unpluging
ALC. See ALC section of
manual