Yamaha MW12 Service Manual page 32

MW12
4. Inspections for USB Assembly
4.1 Scope
This inspection specification is appled to the USB assembly (WG644500).
4.2 Power Source
Measure by using Regulated DC Power Supply with two outputs of "+15V 0.1A or more" and "-15V 0.1A or more".
4.3 Preparation
* Application software of "USB AUDIO"
Use the software that can be set as follows.
(Cubase LE, TWE, etc. Refer to page 33 for the example in the Cubase LE Windows version.)
Sampling rate----48kHz or 44.1kHz
Resolution --------16 bits
* Input impedance of measuring instrument is more than 100k ohms.
* Input signal
Unless otherwise specified, the input signal shall be high quality sine wave.
* Input/Output
L Input : CN101-5pin
L Output : CN101-2pin
+15V : CN101-7pin
USB D+ : JK101-3pin
USB GND : JK101-4pin
* Connection
Connect them as shown in Fig.4.3-1.
Regulated DC Power Supply
L Output
R Output
32
All manuals and user guides at all-guides.com
R Input
R Output
-15V
USB D-
USB VCC
CONNECTION DIAGRAM
USB assembly (WG644500)
+15V 7
GND 8
9
-15V
L Input
5
R Input
6
2
3
: CN101-6pin
: CN101-3pin
: CN101-9pin GND : CN101-8pin
: JK101-2pin
: JK101-1pin
CN101
JK101
TP101
V
DC Voltmeter
Personal Computer
PC
(Fig.4.3-1)