Marantz SR 8100 DC Service Manual

Page 2

INTRODUCTION

This service manual was prepared foruse by Authorized
Warranty Stations and contains service information for
Marantz Model SR-81OODC Stereophonic Receiver.

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 receiver.

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 usually be ob-
tained through local suppliers.

2. TEST EQUIPMENT REQUIRED FOR SERVICING

1. P.W. BOARDS
1. Tuner/Phone ....................... P100
2. Controller ......................... P500
3. VFL. and Signal LED .................. P501
4. PLL and L.P.F. ..................... P502
5. Controller and F.|.P. Jumper ............ P503
6. Controller and PLL Jumper ............. P504
7. Main Amp ......................... P700
8. Main Amp ......................... P701
9. Power Supply . . P800
10. Scan Step SW. ...................... P050
11. Tone Amp ......................... PE00
12. Tone Volume ....................... PE01
13. Connection ........................ PE02
14. Vol/Balance ........................ PGOO
15. Tape Monitor SW. .................... NM
16. Protector ......................... PLOO
17. AC Power Relay ..................... P000
18. Filter/Loudness ..................... P800
19. Speaker Terminal .................... P501
20. Timer Switch ....................... P850
21. Key Board ......................... PTOO
22. PowerOffSwitch PTEO
23. Function SW ........................ PUOO
24. C/F Display ........................ PU50
25. Head Phone ........................ PW01

This table lists the test equipment required for servicing the Model SR-SIOODC Receiver.

Item Manufacturer and Model No.

Use

AM Signal Generator

Signal source for AM alignment

Test Loop

Use with AM Signal Generator

Sound Technology
Model 1000A

FM Signal Generator
MPX Signal Generator

Signal source for FM alignment
Stereo separation alignment and trouble
shooting

Distortion Analyzer
Audio Oscillator
AC VTVM

Sound Technology
Model 1700A

Distortion measurements
Sinewave and squarewave signal source
VolEQe measurements (AC)«

Tektronix Model T932

Waveform analysis and trouble shooting and

Oscilloscope

PhilipsModel 3232

A50 alignment

Frequency Counter

Fluke Model 1900A

MPX Oscillator adjustment (VCO)

Circuit Tester

Trouble shooting

DC VTVM

Fluke Model 8000 Digital" Simpson
Model 313, Triplet Model 801

Voltage measurements (DC)

AC Wattmeter

Simpson Model 1379

Monitors primary power to amplifier

AC Ammeter

Commercial Grade (1-10A)

Monitors amplifier output under short circuit
condition

Line Voltmeter

Simpson Model 1359

Monitors potential of primary power to
amplifier _

Variable Autotransformer

Superior Electronic Co.,
Powerstat Model 116B-10A

Adjusts level of primary power to amplifier

Shorting Plug

Use phono plug with 600vohm
across center pin and shell

Shorts amplifier input to eliminate noise
pickup

Output Load (8 ohms,

Commercial Grade

Provides Bohm load for amplifier output

i 0.5%, 100W) termination
Output Load (4 ohms, . Provides 4-ohm load for amplifier output
: 0.5%, 100W) Commercral Grade termination

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