Raytheon Beech Baron E55 - Page 679

Ray~heon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
Chart
31
TROUBLESHOOTING
FULL
TRANSISTOR
REGULATOR
9000591
TYPE
24
VOLT
(Continued)
INDICATION
PROBABLE
CAUSE
REMARKS
6.
High
systemvoltage.
a.
Driver
transistor
open.
a.
Negative
or
positive
grounded
system:
1.
Defective
transistor.
7.
Nocharge.
a.
Zener
diode
shorted.
a.
Either
system:
1.
Reverse
battery
polarity.
2.
High
system
voltage.
3.
Defective
zener.
8.
High
systemvoltage.
a.
Zener
diode
open.
a.
Either
system:
1.
Defective
zener.
9.
Shorted
outputtransistorand
a.
Field
discharge
diode
open.
a.
Either
system:
high
system
voltage.
1.
Reverse
battery
polarity.
2.
Defective
diode.
10.
No
charge.
a.
Back
bias
diode
open.
a.
Negative
grounded
systems:
1. Severe
ground
at
F
terminal
of
generator.
2.
Severe
ground
in
wiring
between
F terminals
of
generator
and
regulator.
3.
Generator
field
completely
shorted.
4.
Defective
diode.
b.
Positive
grounded
systems:
1.
Sever short
between
F and
negative
leads
between
generator
and
regulator.
2.
Generator
field
completely
shorted.
3.
Defective
diode.
11.
Poor
switching
which
would
a.
Back
bias
diode
shorted.
a.
Negative
grounded
systems:
cause
shorted
output
transistor.
1.
F terminal
of
generator
has
been
grounded.
2.
Poor
ground
in
system
or
poor
connection
at
generator
or
regulator.
3.
Regulator
too
hot.
4.
Ground
in
wiring
between
F
terminals
of
generator
and
regulator.
5.
Defective
transistor.
6.
Shorted
field in
generator.
7.
Defective
diode.
Dec
31/03Page
82
SECTION
13
E21