Marantz MA-9S2 - Service Manual

MA-9S2
Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
Service
Manual
MA-9S2 /
F N/K1G/N1G/U1G
Part no. 90M339J855010
First Issue 2006.09
MZ
Monaural Power Amplifi er
TABLE OF CONTENTS
SECTION PAGE
1. TECHNICAL SPECIFICATIONS ........................................................................................... 1
2. CAUTION .............................................................................................................................. 1
3. ALIGNMENTS ....................................................................................................................... 2
4. BLOCK DIAGRAM ................................................................................................................ 4
5. WIRING DIAGRAM ............................................................................................................... 5
6. SCHEMATIC DIAGRAM ...................................................................................................... 7
7. PARTS LOCATION ..............................................................................................................11
8. EXPLODED VIEW AND PARTS LIST ................................................................................ 23
9. ELECTRICAL PARTS LIST ................................................................................................. 27
MA-9S2
METER OFF
OFF
ON
power on/of f
monau r a l
power ampli f i e r ma
-
9s2
BALANCEDUNBALANCED-2
INPUT SELECTOR
1

Summary

Technical Specifications

Alignments

DC Offset Voltage Adjustment

Procedure for adjusting the DC offset voltage of the amplifier's speaker outputs.

Idling Current Adjustment

Procedure for adjusting the amplifier's idling current for power transistors.

Meter Adjustment

Procedure to set speaker output voltage level using a meter and oscillator.

Block Diagram

Wiring Diagram

Schematic Diagram

Parts Location

Exploded View and Parts List

Exploded View and Parts List

Visual representation and list of parts for the amplifier's physical assembly.

Electrical Parts List

Comprehensive list of electrical components with part numbers and descriptions.

Marantz MA-9S2 Specifications

General

Input Sensitivity	1.2 V
Signal-to-Noise Ratio	120 dB
Type	Mono Power Amplifier
Power Output (4 Ohms)	600 W (20 Hz - 20 kHz, 0.03% THD)
Frequency Response	5 Hz - 100 kHz
Input Impedance	20 kΩ
Power Output (8 Ohms)	300 W (20 Hz - 20 kHz, 0.015% THD)