Sony TC-188SD - Service Manual

Mode!
E Model
SPECIFICATIONS
GENERAL
Frequency
Response:
DOLBY
NR
OFF
Power
Requirements:
110V,
120V,
220V,
240V
ac,
50/60
Hz
With
Ferri-Chrome
cassette
20—16,000 Hz (NAB)
Power Consumption: 11W 30—15,000 Hz +3dB (NAB)
Dimensions:
Approx.
440
(w)
x
145
(h)
x
290
(d)
mm
30—15,000
Hz
(DIN)
17
1/4
(w)
x
53/4
(h)
x
113/g
(d)
inches
With
chromium
dioxide
cassette
20—16,000 Hz (NAB)
30—15,000 Hz +3dB (NAB)
|
30—15,000
Hz
(DIN)
TAPE
RECORDER
SECTION
With
regular
cassette
Track:
4-track
2-channel
stereo
20—14,000
Hz
(NAB)
Fast
Forward
30—13,000
Hz
(DIN)
Rewind
Time:
Approx.
90
seconds
with
Sony
cassette
C-60
Wow
and
Flutter:
0.08%
WRMS
(NAB)
+0.2%
(DIN)
S/N Ratio: DOLBY NR OFF
Weight: Approx. 6.3 kg, 13 Ib 140z
*
‘Dolby’
and
the
double-D
symbol
are
the
trade
marks
of
With
Ferri-Chrome
cassette
Dolby
Laboratory
Inc.
Noise
reduction
system
manufac-
58
dB
at
peak
level
(NAB)
tured
under
license
from
Dolby
Laboratory
Inc.
56
dB
(DIN,
1975
rev.)
*0dB=0.775V
| |
48
dB
(DIN,
old)
With chromium dioxide cassette
54 dB at peak level (NAB)
SAFETY-RELATED
COMPONENT
WARNING!!
DOLBY
NR
ON
Improved
by
5dB
at
1
kHz,
10dB
COMPONENTS
IDENTIFIED
BY
SHADING
ON
THE
sbove’s
Kuz
SCHEMATIC
DIAGRAMS
AND
IN
THE
PARTS
LIST
ARE
CRITICAL
TO
SAFE
CPERATION.
REPLACE
THESE
COMPONENTS
WITH
SONY
PARTS
WHOSE
PART
NUMBERS
APPEAR
AS
SHOWN
IN
THIS
MANUAL
OR
IN
SUPPLEMENTS
PUBLISHED
BY
SONY.
7
— Continued on next page —
®
AANUAL
667
a Sees GR kets cont nee
A ase 2
seni

Summary

Specifications

Section 1: Outline

1-1. Block Diagram

High-level overview of internal circuitry and signal flow.

Section 2: Disassembly

2-1. External Component Removal

Procedures for removing external parts like the top case, bottom plate, and cassette lid.

Deck Mechanism and Holder Removal

Steps for removing the deck mechanism and cassette holder.

Section 3: Adjustments

3-1. Mechanical Adjustments: Overview

Pinch Roller Pressure and Pause Timing Adjustments

Motor and Timing Switch Position Adjustments

Fast Forward and Rewind Torque Adjustment

3-2. Electrical Adjustments: Overview

Procedures for electrical adjustments including tape speed and bias/EQ settings.

Tape Speed Adjustment

Record;playback Head Azimuth Adjustment

Procedure for adjusting the head azimuth for optimal sound quality.

Playback Level Adjustment

Record Bias and Level Adjustments

Sony TC-188SD Specifications

General

Track System	4-track, 2-channel stereo
Motor	DC servo motor
Output	0.775V (line)
Type	Cassette Deck
Heads	1 x record/playback, 1 x erase
Tape Type	Normal, CrO2
Frequency Response	30 Hz - 16 kHz (CrO2 tape)
Inputs	Line In
Outputs	Line, Headphones