Yamaha ACD1 Service Manual page 40

ACD1
3-6. RS485 SHEET test (for circuit board test)（NO. 06）
Contents: Loopback test in circuit board. Check connection from CPU to RS485 transceiver IC (IC605) automatically.
Example of executing screen
*** 06. RS485 SHEET ***
[RS485 SHEET test screen]
Check items
・ DS2 circuit board : Check if the IC605 and peripheral devices are installed properly.
・ BRG circuit board : Check if the IC105, IC110 and peripheral devices are installed properly.
・ Check the signals from the CPU circuit board and connection.
3-7. RS485 ALL test (for general test)（NO. 07）
Contents: Loopback test using the dedicated jig (refer to 1-3.). Command is outputted, transmitted through the jig and the
command from the jig is detected.
Example of executing screen
*** 07. RS485 ALL
Operation
・ Start the application software for testing, "SerialDebugger", with the host PC and execute the test.
Double-click on the "SerialDebugger.exe" in the "C:¥ACD1¥Tool¥SerialDebugger" to start the software.
Check items
・ DS2 circuit board : Check if the IC605, JK601 and peripheral devices are installed properly.
・ BRG circuit board : Check if the IC105, IC110 and peripheral devices are installed properly.
・ Check the signals from the CPU circuit board and connection.
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EXIT:[ENTER]
RS485 OK!
***
EXIT:[ENTER]
RS485 OK!
[RS485 ALL test screen]