Marantz 4300 Service Manual

Page 2

TABLE OF CONTENTS

SECTION PAGE
Introduction ....... . ....................................................... 1
Service Notes ......................................... - ..................... 1
AM Tuner ........................... . ..................................... 1
FM Tuner . . .' ............. . ............................................... 2
Phono and Pre-Amplifier ..................................................... 5
Dolby Unit ............................................................... 6
400Hz Tone .......... . ..................................................... 7
Dolby Switch ............................................................. 7
Record Level (L) (R) ........................................................ 7
Play Cal. (L) (R) ........................................... _ ................. 7
Dolby FM Preset Level Controls ............................................... 8
400Hz Tone Switch ......................................................... 8
FM De-Emphasis Switch ................................ , ..................... 8
Power Amplifier ........................................................... 8
BTL (Balanced Transformer-less) Connection ..................................... 8
Power Supply Unit ......................................................... 8
Audio Trouble Analysis ...................... t ............................... 8
Test Equipment Required for Servicing .......................................... 9
AM Alignment Procedure .................... . ................................ 1 O
FMAlignmentProcedure........................................ ............. 10
Audio Adjustment .......................................................... 11
Automatic Voltage Regulator Adjustment ....................................... 12
Dolby Alignment Procedures .................................................. 12
Alignment Procedures of Dolby FM Preset Level Controls ........................... 13
Explanation of the Dolby Processing Chart ....................................... 13
Parts List ............................................................. 28 ~ 45
Technical Specifimtions .................................................. 46, 47

LIST OF ILLUSTRATIONS

FIGURE PAGE
1. Block Diagram of the HA1156 ............................................. 4
2. Dial Stringing . . . . . . .................................................... 11
3. Dolby Alignment Implement Simplified Schematic .............................. 12
4. Front Panel Adjustment and Component Locations ............................. 15
5. Main Chassis Component Locations (Bottom View) ............................. 15
6. Rear Panel Adjustment and Component Locations .............................. 16
7. Main Chassis Component Locations (Top View) ............. ' ................... 16
8. FM Front End Assembly P100 Component Locations ............................ 17
9. AM Tuner Assembly P150 Component Locations ............................... 17

10. FM IF Amplifier Assembly P200 Component Locations .......................... 17

11. MPX Stereo Decoder. Noise and DC Amplifier Assembly P300

Component Locations .................................................... 18

12. Phono Amplifier Assembly P400 Component Locations .......................... 18

13. Vari-Matrix Assembly P500 Component Locations .............................. 19

14. Dolby Unit Assembly P600 Component Locations .............................. 19

15. Power Amplifier Assembly P700 Component Locations .......................... 20

16. Power Supply Assembly P800 Component Locations ............................ 21 -

17. FM Cal. Assembly P601 Component Locations ......... ' ................... .. . . . 21