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Onkyo TA-2550

Onkyo TA-2550
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TA-2550
SERIAL
NO.
3300
ONKYO
SERVICE
MANUAL
STEREO
CASSETTE
TAPE
DECK
Black
and
silver
model
SAFETY-RELATED
COMPONENT
WARNING!!
COMPONENTS
IDENTIFIED
BY
MARK
“4
ON
THE
SCHEMATIC
DIAGRAM
AND
IN
THE
PARTS
LIST
ARE
CRITICAL
FOR
RISK
OF
FIRE
AND
ELECTRIC
SHOCK.
REPLACE
THESE
COM-
PONENTS
WITH
ONKYO
PARTS
WHOSE
PARTS
NUMBERS
APPEAR
AS
SHOWN
IN
THIS
MANUAL.
MAKE
LEAKAGE-CURRENT
OR
RESISTANCE
MEASUREMENTS
TO
DETERMINE
THAT
EXPOSED
PARTS
ARE
ACCEPTABLY
IN-—
SULATED
FROM
THE
SUPPLY
CIRCUIT
BEFORE
RETURNING
THE
APPLIANCE
TO
THE
CUSTOMER.
ONKYO.
AUDIO
COMPONENTS
SPECIFICATIONS
Track
Format:
4-tracks,
2-channels
Erasing
System:
AC
erase
Tape
Speed:
4.8
cm/sec.
(1-7/8
i.p.s.)
Wow
and
Flutter:
0.045%
(WRMS)
Frequency
Response:
20—17,000Hz
(Normal)
(30—16,000Hz
+
3dB)
20—18,000Hz
(High)
(30—17,000Hz
+
3dB)
20—19,000Hz
(Metal)
(830—18,000Hz
+
3dB)
S/N
Ratio:
60dB
(metal
tape,
Dolby
NR
off)
Anoise
reduction
of
10dB
above
5kHz
and
5dB
at
1kHz
is
possible
with
Dolby
B
NR.
A
noise
reduction
of
20dB
at
5kHz
is
possible
with
Dolby
C
NR.
Input
Jacks:
Line
IN:
2
Input
sensitivity:
6(OmV
Input
impedance:
50kohms
Outputs:
Line
OUT:
2
Standard
output
level:
500mV
(OdB)
Optimum
load
impedance:
over
50
kohms
Headphone
jack:
1
Optimum
load
impedance:
8
to
200
ohms
Motors:
DC
servo
motor:
1
DC
motor:
2
Heads:
REC/PB:
Special
Hard
Permalloy
x
1;
Erase
head:
Ferrite
x
1
Power
Supply
Rating:
AC
220V,
50Hz
Power
Consumption:
19
watts
Dimensions:
435(W)
x
132(H)
x
366(D)mm
(17-1/8"
x
5-3/16"
x
14-3/8")
Weight:
§.8
kg.
(12.8
Ibs.)
Specifications
and
external
appearance
are
subject
to
change
without
notice
because
of
product
improvements.
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Onkyo TA-2550 Specifications

General IconGeneral
Track System4-Track, 2-Channel Stereo
Tape Speed4.8 cm/s
Signal to Noise Ratio (Dolby B Off)60 dB
Output0.5V (line)
Tape TypeType I, Type II
Noise ReductionDolby B
Frequency Response (Metal Tape)20Hz - 20kHz

Summary

SAFETY-RELATED COMPONENT WARNING!

SPECIFICATIONS

SERVICE PROCEDURES

HX PRO CIRCUIT OPERATION EXPLANATION

HX PRO Basic Operation

Details the HX PRO circuit's basic functional operation.

HX PRO BLOCK DIAGRAM

BLOCK DIAGRAM

MICRO COMPUTER (HD614042 SH57)

IC BLOCK DIAGRAM

COUNTER IC (HD614128 SA41)

ADJUSTMENT PROCEDURES

Key Adjustment Items

Details on adjusting tape speed, heads, levels, bias, and HX-PRO.

Chassis Exploded View

Chassis Exploded View Parts List

Tape Mechanism Parts List

Tape Mechanism Exploded View

PC Board View (Bottom Side)

Schematic Diagram (22)

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