MODEL PM-94 STEREO AMPLIFIER
INTRODUCTION
This service manual was prepared for use by Authorized
Warranty Stations and contains service information for the
Marantz Model PM-94 Stereo Amplifier.
Servicing information and voltage data included in this
manual are intended for use by knowledgeable and ex-
perienced personnel only. All instructions should be read
carefully. No attempt should be made to proceed
without a good understanding of circuitry operation.
The parts list furnishes complete ordering information.
Most replacement parts should be ordered from the
Marantz Company. However, a simple description is in-
cluded for parts which can be obtained locally.
1. P.W. BOARDS
As can be seen from the circuit diagram the
chassis of Model PM-94 consists of the following
units. Each unit mounted on a printed circuit board
is discribed within the square enclosed by a bold
dotted line on the circuit diagram.
1. Tone (L)......................mounted on P.W. Board PE01
2. Tone (R)......................mounted on P.W. Board PE02
3. Flat Amp/Supply ........mounted on P.W. Board PG00
4. CD Direct/
Balance etc ...............mounted on P.W. Board PK00
5. Power Transistor..........mounted on P.W. Board PL00
6. Comparator/Protec/
Supply..........................mounted on P.W. Board PN00
7. Soft Start Ass'y...........mounted on P.W. Board PN50
8. Main Volume................mounted on P.W. Board PQ00
9. Speaker Muting
Relay............................mounted on P.W. Board PR00
10. Phono/Speaker
Selector........................mounted on P.W. Board PR50
11. Tone/Tape 1.2/
VCR/Muting ...............mounted on P.W. Board PT00
12. Function Selector ...... mounted on P.W. Board PV00
13. Tape Play/
Rce/VCR.................... mounted on P.W. Board PW00
14. Function LED......mounted on P.W. Board PY00
15. Tape/VCR/Muting
Indicator ......................mounted on P.W. Board PZ00
16. Phono Amp/
Input Selector........... mounted on P.W. Board P400
17. Power Amp (L)...........mounted on P.W. Board P600
18. Power Amp (R)...........mounted on P.W. Board P700
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