Eico HF-85 - Page 36

TROUBLE-SHOOTING
CHART
SYMPTOM
CAUSE
REMEDY
Preamplifier
causes power
line fuse
to
blow.
Line cordy
J18yJ19, primary
or high
voltage secondary
windings
of T1 in-
correctly
wired.
Repair
Pri./h.v.
sec. windings
of
T1 shorted.
Replace
Any tube
filament not
lit.
Open leod from
6.
3V winding of Tl.
6.
3V
winding
of Tl open.
Repair
Replace
DC
voltage at
V6 cathode
(pin
7)
is incorrect
as specified below.
a) No voltage.
Defective
V6
C27A shorted
intemaliy
or externally.
Open
R58
Connection to
center-tap of
high
voltage
winding
of
Tl is open.
Replace
Replace
(or repair)
Replace
Repair
b)
Low voltage.
C27A
O.K. bot
C27B or C shorted.
C27
open or rto
connection.
Excessive current
drain
in amplifier
Replace
Replace
(or repair)
Repair
e)
High
voltage.
Tubes
V1-V4 defective or
over-biased
and
not drawing
normol current.
Repair
(or
replace)
Op«n R53 or ft54.
Roplaco