Marantz SD4000 - Introduction and Service Basics; Required Servicing Test Equipment

MARANTZ MODEL SD4000 STEREO CASSETTE DECK
YFDI1I000
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INTRODUCTION
This service manual are prepared for use by Authorized
Warranty
Station
and
contains
service
information
for
Marantz Stereo Cassette Deck.
Servicing
information
and
voltage
data
included
in
this
manual
are
intended
for
use
by
the
knowledgeable
and
experienced
technician
only.
All
instructions
should
be
read
carefully.
No
attempt
should
be
made
to
proceed
without
a
good
understanding
of
the
operation
of
the
Cassette
Deck.
The parts list furnishes information by which replacement
parts may be ordered from the Marantz Company. A
simple description is included for parts which can be
usually obtained through local suppliers.
1. P.W. BOARDS
As
can
be
seen
from
the
circuit
diagram,
the
chassis
of
your
Cassette
Deck
consists
of
the
following
units,
Each
unit
mounted
on
a
printed
circuit
board
is
described
within
the
square
enclosed
by
a
bold
dotted
line
on
the
circuit
diagram.
1.
PreAmp.........-
mounted
on
P,W.
Board
P100
2.
Fus€....
eee
ee
eae
mounted
on
P.W.
Board
P400
3.
Compuskip.........
mounted
on
P.W.
board
P450
4.
Dolby............
mounted
on
P.W.
Board
P500
5.
LED
Meter
Amp.....
mounted
on
P.W.
Board
P600
6.
LED
Meter.........
mounted
on
P.W.
Board
P650
7.
Power
LED
.......
ee
ce
eee
eee
mounted
on
P700
8.
MICAmp&Vol.....
mounted
on
P.W.
Board
P700
9.
Power
Supply.......
mounted
on
P.W.
Board
P900
@speed cassette deck
2. TEST EQUIPMENT REQUIRED FOR SERVICING
For measuring or checking your Cassette Deck, the fol-
lowing instruments and materials are necessary.
VTVM
Audio Oscillator (AF OSC)
Attenuator (600 22)
Oscilloscope
Bandpass Filter (1 kHz)
IEC A-Curve Filter
Wow and Flutter Meter
Torque Meter (Cassette Type)
Digital Frequency Counter
Distortion Meter
Blank Tapes (Completely erased with bulk eraser)
TDK AC-211 (Normal)
TDK AC-511 (Special/CrO, )
SONY CS-30 (Fe-Cr)
TDK AC701
eee @2eee8ee @
NOTE: If any doubt is noted in a measured value, use
new tape.
@ Test Tapes (New Tape)
MTT-111 Wow and Flutter, Tape Speed [1-7/8
1.P.S. (4.75 cm/sec)]
MTT-111SP Wow and Flutter, Tape Speed [3-3/4
1.P.S. (9.5 cm/sec)]
MTT-112 Measurements of Output Level and Sig-
nal-to-Noise Ratio
MTT-150 Adjustment of Output Level
MTT-216 Frequency Response (for Norma!)
MTT-316 Frequency Response (for CrO2, Fe-Cr,
Metal)
MTT-121 Cross Talk
MTT-141 Channel Separation