Marantz SUPERSCOPE CD-312 - Page 5

INTRODUCTION
This service manual are prepared for use by
Authorized Warranty Station and contains serv-
ice information for Superscope Model CD-312
Stereo Cassette Deck.
Servicing information and voltage data included
in this manual are intended for use by the knowl-
edgeable 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
Superscope Inc. A simple description is included
for parts which can be usually obtained through
local suppliers.
1. TEST EQUIPMENT REQUIRED FOR
SERVICING
For measuring or checking the CD-312, the fol-
lowing 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-211 (Normal)
TDK AC-511 (CrO2)
SONY CS-30 (Fe-Cr)
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 Measurement of Output Level
Signal-to-Noise Ratio
MTT-150 Adjustment of Output Level
MTT-116U Frequency Response (for Normal)
MTT-116K Frequency Response (for CrOz,
Fe-Cr)
MTT-121 Cross Talk
MTT-141 Channel Separation
BIAS and EQ switches setting in accordance with
tape used are as follows:
Switch Position
EQ Switch BIAS Switch