Marantz cp430 - Level Meter Adjustment; Playback Noise Measurement; MPX Filter Adjustment; Record;Playback Frequency Response and Recording Level Adjustment

MODEL CP430/PMD430 STEREO CASSETTE RECORDER
INTRODUCTION
This
service
manual
are
prepared
for
use
by
Authorized
Warranty
Station
and
contains
service
information
for
Marantz
Stereo
Cassette
Recorder.
Servicing
information
and
voltage
data
included
in
this
manual
are
intended
for
use
by
the
knowledgeable
and
ex-
perienced
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
Recorder.
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
ob-
tained
through
local
suppliers.
1. SHOCK, FIRE HAZARD SERVICE TEST:
CAUTION: After servicing this appliance and prior to
returning to. customer, measure the resistance between
either primary AC cord connector pins (with unit NOT
connected to AC mains and its Power switch ON), and
the face or front Panel of product and contrnis and chassis
button.
Any resistance measurement less than 1 Megohms should
cause unit to be reparied or corrected before AC power
is applied, and verified before return to user/customer.
Ref. UL Standard NO. 1270. Para 66. 3. D (Mandatory
Test after servicing Electrical Appliances, effective 7-1-83).
2. PW. BOARDS
As can be seen from the circuit diagram, the chassis of
your
Cassette
Recorder
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 cir-
cuit diagram.
1.
Rec/Play
Amp
.....
mounted
on
P.W.
Board
PK01
2.
TAPE
EQ
AMP
.
mounted
on
P.W.
Board
PJO1
3.
ATT
Switch.......
mounted
on
P.W.
Board
PKO3
4.
LiE
Di
aii
veaidan
mounted
on
P.W,
Board
PX02
5.
Mecha
Control
.....
mounted
on
P.W.
Board
PM0O1
6.
Control
Switch...
..
mounted
on
P.W.
Board
PS01
7.
Light
2.2.00...
mounted
on
P.W.
Board
PX01
8.
MicMode
........
mounted
on
P.W.
Board
PKO2
9,
DolbyNRL
......
mounted
on
P.W.
Board
P601
10.
DolbyNRR
......
mounted
on
P.W.
Board
P602
3. TEST EQUIPMENT REQUIRED FOR
SERVICING
For
measuring
or
checking
your
Cassette
Recorder,
the
following
instruments
and
materials
are
necessary.
VTVM
Audio Oscillator (AF OSC)
Attenuator (600 2)
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-212 (Normal)
TDK AC-512 (Special/CrO, )
TDK AC-712' (Metal)
NOTE: If any doubt is noted in a measured value, use new
tape.
© Test Tapes (New Tape)
MTT-111 Wow and Flutter, Tape Speed
MTT-112 Measurements of Output Level
MTT-112B Signal-to-Noise Ratio
MTT-150 Adjustment of Output Level
MTT-256 Frequency Response (for Normal)
MTT-356 Frequency Response (for Special/
CrO2 and Metal)
MTT-121 Cross Taik
MTT-141 Channel Separation