Yamaha MX61 Service Manual page 34

MX61/MX49
Test
LCD display
No.
022 022: Foot Control Chk
023 023: Sustain Chk
024 024: MIDI Chk
025 025: USB Connect Chk
026 026: USB FunctionChk
Since this test item is for
factory inspection, isn't required First, the CPU tries the communication test with the USB controller IC on the PCB.
to be executed when servicing. At that time, confirm "MIDI:OK" is displayed on the LCD and the communication test is passed.
027 027: USB Storage Chk
028 028: Keyboard TypeChk
34
Test description, judging conditions, etc.
Checks the foot controller.
Before executing the test, connect a foot controller (FC7) to the [FOOT CONTROLLER] terminal.
Press the pedal down up to maximum, and the C3 note is output.
Then, pull the pedal up to minimum, and the G3 note is output.
After executing the test, confirm that "OK" is displayed on the LCD.
("FC Down:yy" , "FC Up:yy") / yy = Current value
(OK: "OK")
Checks the sustain pedal.
Start the test without connecting any foot pedal to the FOOT SWITCH [SUSTAIN] terminal.
After starting the test, connect a foot pedal (FC3) to the FOOT SWITCH [SUSTAIN] terminal.
Press the pedal, and the C3 note is output.
Then, release the pedal, and the G3 note is output.
After executing the test, confirm that "OK" is displayed on the LCD.
("FS Down:yy" , "FS Up:yy") / yy = Current value
(OK: "OK")
Checks the MIDI terminals.
Before starting the test, connect the MIDI [IN] and [OUT] terminals using a MIDI cable.
When executing the test, confirm the C4 note is output.
After executing the test, confirm that "OK" is displayed on the LCD.
(OK: "OK" / NG: "NG")
Notes: In case of inspecting by the MIDI operation,
Checks the USB connection.
Start the test without connecting any cable to the USB [TO HOST] and [TO DEVICE] terminals.
When executing the test, "Connect Device - Host" is displayed on the LCD.
To execute the loop check, connect the USB [TO HOST] and [TO DEVICE] terminals using a USB cable.
After executing the test, confirm that "OK" is displayed on the LCD.
When the result is "OK" , "Connect USB Storage" is displayed.
Then, connect a USB storage device to the USB [TO DEVICE] terminal.
Confirm that "OK" is displayed on the LCD.
Checks the USB communication between the USB [TO HOST] terminal and the PC.
Before starting the test, connect the USB [TO HOST] terminal and the PC using a USB cable.
Then, start up the test tool "AsioLoopBack.exe" on the PC.
(OK: "MIDI:OK Audio Out" / NG: "MIDI:NG(Serial)" , "MIDI:NG(GPIO FULL-CN)" ,
Then, the C3 note is output to the PC with the audio channel 1 on USB.
The signal is loop backed from the PC, and output from the OUTPUT [L/MONO] and [R] terminals.
Confirm the C3 note is output with the audio channel 1 at that time.
Press the [INC] switch, and the G3 note is output to the PC with the audio channel 2.
Confirm the G3 note is output with the audio channel 2 at that time.
Checks if the USB device is recognized.
Start the test without connecting any cable to the USB [TO HOST] and [TO DEVICE] terminals.
Before connction, "Connect USB Storage" is displayed on the LCD.
After starting the test, connect a USB storage device to the USB [TO DEVICE] terminal.
(Device Recognition Test)
After executing the test, confirm that "OK" is displayed on the LCD.
(OK: "OK" / NG: "NG")
Checks if the keyboard type is correct.
The Keyboard type is recognized.
Confirm the correct type is displayed as follows.
(OK: "OK 16N" / NG: "NG")
the test for MIDI [IN] and [OUT] terminals is unnecessary.
"MIDI:NG(GPIO HIDMIDI-SUS)")