NAD 712 - Fuse Replacement and Safety Checks; Fuse Replacement Guidelines; Post-Service Safety Check Procedure

SERVICE
SAFETY
PRECAUTIONS
We Replacing the fuses
SS
This
symbol
located
near
the
fuse
indicates
that
the
fuse
used
is
fast
operating
type.
For
continued
protection
against
fire
hazard,
replace
with
same
type
fuse.
For
fuse
rating
refer
to
the
marking
adjacent
to
the
symbol.
Reference
No
Part
Number
Description
F503-F504*AH
5120-0019-0
Fuse
4A
125V
Time
Lag
LBC
(UL/CSA)
F503-F504*B,B1,C
5120-0017-0
Fuse
4A
250V
Time
Lag
HBC
(SEMKO/VDE)
F505-F507*AH
5120-0026-0
Fuse
315mA
250V
Time
Lag
LBC
(UL/CSA)
F505-F507*B,B1,C
5120-0027-0
Fuse
315mA
250V
Time
Lag
LBC
(SEMKO/VDE)
NOTE
:
-
<*AH>
:USA,
CANADIAN
MODEL
ONLY.
<"B>
:UK
MODEL
ONLY.
<"B1>
:
AUSTRALIAN
MODEL
ONLY.
<*C>
: EUROPEAN
MODEL
ONLY.
2. Safety-check out
(Only U.S.A. model)
After
correcting
the
original
service
problem
perform
the
following
safety
check
before
releasing
the
set
to
the
customer.
Connect
the
insulating-resistance
tester
between
the
plug
of
power
supply
cord
and
the
screw
on
the
back
panel.
Specifications
:
3.3
Mohm+10%
at
500V.