Roland BK-5 Service Notes page 32

Jan. 2012
3. Disconnect the USB cable and make sure the display shows "Disconnected OK".
4. Press [START/STOP] button to go to next test.
8. USB MEMORY check
The display shows:
1. Connect the USB Memory (like ROLAND M-UF2G) to USB MEMORY socket.
2. Verify that the display shows : USB MEMORY "Connected" and READ/WRITE: OK.
3. Remove the USB Memory and make sure the display shows: USB MEMORY "Disconnected OK".
4. Press [START/STOP] button to go to next test.
9. LCD check
The display shows:
1. Press the following four switches and check the related display-LCD condition:
All pixels are off
2. Press [START/STOP] button to go to next test.
3
All pixels are on The pattern is right
and tidy
The pattern is right
and tidy