Tokyo Hy-Power HL-1.5KFX User Manual page 9

turned off immediately after finishing operation. Allow the cooling fan to run for an
extended period of time.
‡ F -3 ID:
Excessive Id Indicator (>35A). Depending on the band and antenna situation, high
drain current may flow into FET's. If 35A is exceeded, this LED flickers and/ or
lights to indicate that high Id is being drawn. (This light does not necessarily mean
a failure of the amplifier. However if it lights too often, or too long, it is possible the
drive power should be reduced and the antenna should be checked for SWR, to
avoid stress to the FET's).
‡ G O. DRIVE, O. HEAT, O. VOLT, FUSE, PR
‡ G -1 O.DRIVE
: When overdrive or band miss-set is detected, LED lights to indicate the protection
circuit has worked.
‡ G -2 O.VOLT
: When the DC drain voltage of the FET's (Vd) is too high, the LED lights to indicate
the protection circuit has worked.
‡ G -3 O.HEAT
: When the PA module temperature reaches 70 deg. C, the LED lights to indicate the
protection circuit has worked. (It is necessary for the cooling fan to operate for
several minutes to cool the PA module).
‡ G -4 FUSE
: LED lights when the 20A glass fuse has blown from excessive Id. (Two 20A fuses
are on the PC1622V PA board.)
‡ G -5 PR
: LED lights when reflected power from antenna exceeds 80W to indicate protection
circuit has worked.
(Turning the main POWER switch to off, and then on again can
reset the Protection Circuits
‡ H BAND
One of the green LED lights will indicate which band is selected for operation.
‡ I MULTIMETER
Pf (Forward output power), Pr (Reflected power from antenna), Vd (FET drain
voltage), and Id (FET drain current) are shown on the scale as selected by ‡ B
METER select switch.
.)
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