Sony TA-D505 Service Manual

TA-D505
SAFETY CHECK-OUT TABLE OF CONTENTS
After correcting the original service problem, . . P
perform the following safety check before releasing peer iOne BLUE ws
the set to the customer: SECTION 1. GENERAL* * + + * ee © © © © © 3
Check the antenna terminals, metal trim, ‘‘metallized” SECTION 2. DIAGRAMS
knobs, screws, and all other exposed metal parts for
AC
leakage.
Check
leakage
as
described
below,
2-1.
IC
Pin
Functions
+
++
+++
4
2-2. Circuit Boards Locations + + 6
2-3. Printed Wiring Boards+ + + + 8
2-4. Schematic Diagram
LEAKAGE TEST —Audio Section— ¢« «© © © «© « « «© 13
The
AC
leakage
from
any
exposed
metal
part
to
2-9.
ecHene
TLC
kagran
earth ground and from all exposed metal parts to any —Control Section— + + + + + + + 18
exposed metal part having a return to chassis, must SECTION 3. EXPLODED VIEWS
not exceed 0.5mA (500 microampers). Leakage
3-1. Cabinet Sections *© * © «© « « 2]
current can be measured by any one of three
methods. 3-2. Main Board Section + + « « + 22
© 23
e e e
1.
A
commercial
leakage
tester,
such
as
the
SECTION
4.
ELECTRICAL
PARTS
LIST
-
Simpson
229
or
RCA
WT-540A.
Follow
the
manufacturers’
instructions
to
use
these
instru-
ments.
MODEL IDENTIFICATION
2. A battery-operated AC milliammeter, The Data —Specification Label—
Precision 245 digital multimeter is suitable for
this job.
3.
Measuring
the
voltage
drop
across
a
resistor
by
——
,
means
of
a
VOM
or
battery-operated
AC
volt-
meter.
The
“limit”
indication
is
0.75V,
so
SONY:
MODEL
NO.
analog
meters
must
have
an
accurate
low-
voltage
scale.
The
Simpson
250
and
Sanwa
|
INTEGRATED
STEREO
AMPLIFIER
SH-63Trd
are
examples
of
a
passive
VOM
that
is
suitable.
Nearly
all
battery
operated
digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)
To Exposed Meta!
Parts on Set
AEP, GERMANY, ITALIAN model: AC: 220V~ 50/60Hz
UK model: AC: 240V~ 50/60Hz
E, SAUDI ARABIA,
AUSTRALIAN model: AC: 120/220/240V~ 50/60Hz
AC
0.15 uF voltmeter
| | (0.75 V)
SAFETY-RELATED COMPONENT WARNINGI!
COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
= Earth Ground
Using an AC voltmeter to check AC leakage.

Sony TA-D505 Specifications

General

Brand	Sony
Model	TA-D505
Category	Amplifier
Language	English