Final Steps; Service - Eico HF-35 Instruction Manual

FINAL
STEPS
You have now
completed
the
assembly
and
wiring of your amplifier.
When
you have completed
the following steps your amplifier
wi
1 1
be ready
for use.
1}
To catch any wiring
errors.
It is
suggested
that the entire
wiring be
checked
polnt-by-polnt
against the wiring instructions (and
preferably
also against the
schematic wiring diagram
In
order to
become
more
familiar
with the
component
layout and
circuitry).
While doing
so,
check
for rosin Joints, loose
lumps
of
solder, poor lead
dress,
and accidental
shorts or
leakage paths arising From the
flow of
rosin
between
contacts (remove with a
stiff
brush dipped
In
carbon
tetrachloride)*
2)
Clean
socket
XVI
with carbon tetrachloride using a
stiff
brush.
It is
also
advisable
to
remove
the tube and shield from
XVI,
and clean the socket
and
pins
on
top of the
chassis.
3)
Insert tubes
VT
through
V5
in
their correct sockets
and
the fuse
in
the fuse
holder* Place a shield over
VI
4)
Insert the octal plug into octal socket J4,
5)
IMPORTANT:
BE
SURE
TO
MAKE
THE
FOLLOWING
RESISTANCE
CHECKS
BEFORE
CONNECTING TO
THE
AC
LINE:
Check
for
a colddc
resistance of
at
least
1.2
ohms
across the
AC
pul
gf
check
for
a resistance of at least
45
ohms
between ground and
pins
4 and
6
of
XV5; check
for
a
resistance
of at least
200 K ohms between
pin 8 of the rectifier
tube
V5
and ground.
Allow
suffi-
cient time for the electrolytic capacitors to
be charged by the
ohmmeter
bat-
tery In this last
measurement. These measurements const
itute
a reasonable check
of the
power
supply
components and wiring before applying power.
If
you
fall
to
obtain these resistance values/
do
not
proceed
to
the next
step until
the
cause
Is
discovered
and the condition remedied.
If
the
measurements are sat-
isfactory,
proceed
to
CONTROL ADJUSTMENTS
in
the
MAINTENANCE
sec-
tion
of the book*
DO NOT CONNECT
TO
THE
AC
LINE
until
you have com-
pleted the preliminary
BIAS
ADJ* and
BALANCE
ADJ.
control adjustments,
at
which
point
you
will
be
Instructed to
do
so.
When
you have completed the
CONTROL
ADJUSTMENTS,
proceed
to
the
step
following
this
one,
after
having disconnected the amplifier from the
AC
line.
6) Press
a speed nut
In
place over each hole on
the
bottom flange of the chassis
(see Fig. 6),
7) If
the amplifier
is
not
going
to
be
fastened to
some surface
,
insert
the rubber
feet
in
the
openings provided
In
the
bottom
plate
and mount
the bottom plate
on
the chassis,
using 10
^8^32
X
3/8"
screws.
Do
not use the
1"
long screws
for this
purpose (possibility of
shorting input jack).
If
the amplifier
is
to
be
fastened
to
a surface, the Feet will not
be used
and
the
bottom
plate will be
required
as
a
template before
it
is
attached
to
the amplifier.
8)
Read
theMECHANICAL
I
N5TALLATION
and
ELECTRICAL INSTALLATION
sections of the instruction
book coreful
ly,
and
Install
and connect
the
amplifier
IF
you are
still
having
difficulty,
write
to
our service
department
listing all
possible Indications that
might be helpful.
If
desired,
you
may
return the in-
strument
to
our factory
where
if
w!
1 1
be placed
in
operating condition for
$5.00
plus the cost of parts
replaced due to their being
damaged
in
the course of
construction. This
service policy applies only
to
completed
instruments
con-
structed
in
accordance with the instructions as stated
in
the
manual.
Instru-
ments that are not
completed
or
instruments that are
modified
will not
be ac-
cepted
for repair.
Instruments that
show evidence of acid core solder
or
paste
fluxes will
be returned not repaired.
NOTE:
Before returning this unit,
be
sure
all parts
are securely
mounted. Attach a tag
to
the instrument, giving
your
home
address
and the trouble
with
the unit.
Pack very
carefully
in
a
rugged container, using sufficient
packing
material (cotton,
shredded news-
paper,
or excelsior), to
make
the unit
completely
immovable
within
the
con-
tainer.
The original shipping carton
is
satisfactory,
providing
the original
inserts
are used or sufficient
packing
material
Is
Inserted to
keep the instru-
ment immovable.
Ship by prepaid Railway
Express,
if
possible,
to
the Elec-
tronic Instrument
Co.
,
Inc.,
33^00
Northern Blvd. L.l.
C.
1,
New
York. Re-
turn
shipment
will
be
made by
express collect.
Note
that the carrier
cannot be
held
liable for
damages
In transit
If
packing,
[N
HIS
OPINION,
Is
insufficient.