Yamaha CL3 Service Manual page 138

CL3/CL1
1-0. INFORMATION
Contents: Checks such items as if the version of the fi rmware
is correct.
Example of executing screen
1-1. CPU MRAM test
Contents: Checks the address data bus line and data bus line of
MRAM on the CPU circuit board.
Example of executing screen
Display in case the check result is NG
NG: MRAM A[X](0xXXXXXXXX) W:XXXXXXXX-R:XXXXXXXX
Address bus number which is judged as NG
NG: MRAM D[X] W:XXXXXXXX-R:XXXXXXXX
write data
Data bus number which is judged as NG
138
When address bus is NG
write data read data
CPU Address
When data bus is NG
read data
1-2. CPU SDRAM test
Contents: Checks the voltage measuring circuit of the backup
battery and judges automatically.
Example of executing screen
Display in case the check result is NG
NG SDRAM ADDRESS BUS Ax
Address bus number which is judged as NG
NG SDRAM DATA BUS Dx
Data bus number which is judged as NG
1-3. BATT test
Contents: Checks the voltage measuring circuit of the backup
battery and judges automatically.
Example of executing screen
When address bus is NG
When data bus is NG