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
