Yamaha MW10 Service Manual page 31

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. Reffer to page 32 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 Input
R Input
L Output
R Output
R Input : CN101-6pin
R Output : CN101-3pin
-15V : CN101-9pin
USB D- : JK101-2pin
USB VCC : JK101-1pin
CONNECTION DIAGRAM
USB assembly (WG644500)
CN101
+15V 7
GND 8
9
-15V
5
6
2
3
GND : CN101-8pin
JK101
TP101
V
DC Voltmeter
(Fig.4.3-1)
Personal Computer
PC
MW10
31