Sony TA-E88 Service Manual

TA-E88
(Panel:
Silver)
AEP Medel
TA-E88B (Panel: Black).
AEP
Medel
UK
Medel
SPECIFICATIONS
GENERAL
Power
Requirements:
0dB=0.775 V |
240 V ac, 50/60 Hz (UK)
Outputs:
220
V
ac,
50/60
Hz
(AEP)
a
=
Power
|
Voltage
Impedance
Consumption:
22
W
REC
OUT
1,2
|
150
mV
(—14.5
dB)
(max.
15
V)
1kQ
Dimensions: Approx. 480 (w) x 80 (h) x 370 (d) mm OUTPUT 1,2 1.5 V (5.5 dB) (max. 15 V) 100 2
19
(w)
x
3.34
(h)
x
14
x
(d)
inches
Including
projecting
parts
and
controls
Approx.
9.4
kg,
20
Ib
12
oz
(net)
9.7
kg,
21
Ib
7
oz
(with
shipping
carton)
Harmonic Distortion: Less than 0.002 % at 10 V output
IM Distortion: Less than 0.002 % at 10 V output
(6O0Hz : 7kHz=4: 1)
Weight:
Frequency Response: PHONO 1,2 RIAA equalization curve +0.2 dB
TUNER, AUX 0
' = +
TAPE 1,2 ) de — 500 kHz ty dB
Filters: LOW 12 dB/oct. below 15 Hz
Less than 6 nV (weighting network A, IHF with
ATTENUATOR set to min imum,
FILTERs to OFF}
Residual Noise:
AMPLIFIER SECTION
Inputs:
Rae
|
.
Maximum
input
S/N
(weighting
network,
I
|
Sensitivity
mpedance
Capacitance
capability
(1
kHz)
|
input
level)
|
PHONO
1
2.5
mV
(—50
dB)
50
kQ
100
pF
250
mV
(—10
dB)
88
dB
{A,
2.5
mV)
Sn
at
se
i
ea
ae
Pee
ee
Ones
oh
eee
eee
i
ein
elle
ee
er
er
eg
2
|
HEAD
AMP
0.125
mV
(—76
dB)
252:/1002
-
12.5
mV
(—36
dB)
80
dB
(A,
0.2
mV)
10 kQ—-100 k2j100 pF—S00 pel
HON
Vv
{+
i
—
PHONO
2
2.5
mV
{(—50
dB)
(10
k®
steps)
|
(100
pF
steps)
250
mV
{-10
dB)
88
dB
(A,
2.5
mV)
|.
—--~.~--}
---
ae
no
Sani
a)
kar
ated
td
cies
hatchet
Lo
os
a
eesti
vale
>
marae
oie
cs
ae
ad
Se
ee
wa
a
we
HEAD
AMP
0.125
mV
(—76
48)
|
2522/1002
-
/12.5
mV
(—36
dB)
80
dB
(A,
0.2
mV)
TUNER, AUX
TAPE
1.2
150
mV
(—14.5
dB)
50
kQ
_
_
105
dB
(A,
150
mV)
SAFETY-RELATED
COMPONENT.
WARNING
COMPONENTS
IDENTIFIED
BY
SHADING.
AND
A
MARK
ON.
THE
SCHEMATIC
DIAGRAMS,
EXPLODED
VIEWS
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
PUBLISHED
BY
SONY.

Sony TA-E88 Specifications

General

Type	Stereo Preamplifier
Channels	2
Total Harmonic Distortion (THD)	0.003%
Signal-to-Noise Ratio (MM)	86dB
Input Sensitivity (MC)	0.25 mV
Input Sensitivity (MM)	2.5 mV
Input Sensitivity (line)	150 mV
Output Voltage (line)	1 V
Channel Separation (MM)	60 dB
Output Impedance	100 ohms
Input Impedance	47 k ohms (MM), 100 ohms (MC)
Dimensions	430 x 80 x 365mm

Summary

Audio Preamplifier Specifications

Output and Input Specifications

Covers output levels, impedance, frequency response, filters, and input sensitivity for various inputs.

Circuit Description and Block Diagram

Block Diagram Overview

Presents the overall block diagram of the TA-E88/E88B stereo preamplifier.

Phono and Head Amplifier Circuits

Explains the design and operation of the PHONO input stages and the MC head amplifier.

Equalizer and Buffer Amplifier Circuits

Describes the equalizer amplifier stage and the buffer amplifier for level control.

Output, Power Supply, and Relay Circuits

Details the output amplifier, power supply system, and relay drive circuit for muting.

Overall Amplifier Stage

Disassembly Procedures

Case and Bottom Plate Removal

Panel and Knob Removal

Adjustments and Calibration

Offset Adjustments

Guides for performing offset voltage adjustments on EQ, Output, and Buffer amplifier stages.

Diagrams and Schematics

Schematic Diagrams

Electrical Parts List

Semiconductors and Transformers

Capacitors and Resistors

Switches, Jacks, and Accessories