Sony mu x121 audio mixer

Page 2

MU-X121 |

SECTION 1
GENERAL

TABLE OF CONTENTS

Section Title Pge
SECTION 1 GENERAL
1.1. Outline .................................. 2
1-2. Location and Function of Parts -------- 3
1-3. Connection Examples -------------------- 9
1-4. Functioning of Phone Select Switch ------ 13
SECTION 2 DISASSEMBLY -------------------- 15
SECTION 3 ADJUSTMENT -------------------- 15

SECTION 4 DIAGRAMS

4-1. Block Diagram .......................... 15
4-2. Circuit Boards Location ------------------ 17
4-3. Frame Schematic Diagram- - 17
4-4. Schematic Diagram -Input A board- 19
4-5. Mounting Diagram -Input A Board- 19
4-6. Schematic Diagram -Input B Board- - - -- 21
4-7. Mounting Diagram -Input B Board- ~ - -- 21
4-8. Schematic Diagram -Master L/Master R/ 23
Aux 1 Board- ..........................
4-9. Mounting Diagram -Master L Board- -- 23
4-10. Mounting Diagram -Master R Board- - - 25
4-11. Mounting Diagram -Aux 1 Board- ------ 25
4-12. Schematic Diagram -Aux 2 Board- ------ 27
4-13. Mounting Diagram -Aux 2 Board- ------ 27
4-14. Schematic Diagram -Led L, (R) Board- -- 29
4-15. Mounting Diagram -Led L. (R) Board- -- 29

SECTION 5 EXPLODED VIEW AND
pAg'rs LIST ...................... 31

SECTION 6 ELECTRICAL PARTS LIST -------- 33

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED ev squmc AND MARK

A ON THE SCHEMATIC DlAGRAMS AND IN THE
PARTS Llsr ARE CRITICAL ro SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY mars
wnose PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL on IN SUPPLEMENTS PUBLISHED BY sow.

1-1. OUTLINE

Two stereo inputs (channel 1 through 4)

Two stereo systems are connected, and the level of
connected stereo signal can be controlled with a single
factor.

80. for example, switching between two tum tables can
be performed easily using the fade-in and fadeout
effects.

a channel inputs with wide level range

The MU-X12l is provided with 8 input connectors which
can accept the line and microphone input signals. The
level of input signals are controlled by referring to the
PEAK indicators so that the optimum level can easily
be obtained.

Easy monitoring

Using the headphones, the pre-master fader signal can
be monitored so that intercommunication between a
player and mixing operator is possible without affecting
the output signal.

As for the input signals, the pre-fader signal can also
be monitored channel by channel using the headphones
so that the signal can be checked and the setting can
be changed during piaying.

In-line arrangement of controls and connectors

As the controls and switches on the front panel and the
connectors for each channel are arranged in-Iine, the
change of connections can be done without error.

Balanced type connectors

Thanks to the floating electric balancing circuit for input
and output. the unit is compact and lightweight. and
also the wide frequency range and low noise design is
realized.