Yamaha CL3 Service Manual page 146

CL3/CL1
2) SIO Connection (DSP7 → RECORDER)
NG: IC206 [SO08] → IC402 [BDR0]
SIO Connection (RECORDER → DSP7) ...
NG: IC402 [BDX0] → IC201 [SI09]
NG: IC402 [BDX0] → IC203 [SI09]
1-22. DNTU SDRAM Test
Contents: Checks the condition of the address bus line and the
data bus line by writing/reading CPU SDRAM on the
DNTU circuit board.
Example of executing screen
1-23. DNTU PLLPU Test
Contents: Checks the condition of the address bus line (A0...A4)
and data bus line (D0...D15) by writing/reading the
registers (00, 0f, 10, 16) of PLLPU.
Example of executing screen
146
1-24. DNTU SIO Test
Contents: Checks the connection between DSP7 and DANTE by
transmitting and receiving signals.
Checks the condition of DNTU circuit board and
Brooklyn2 by executing UART and SPI communication
between them.
Checks visually each of Primary and Secondary LEDs
for lighting(fl ashing).
Example of executing screen
1-25. DNTU Brooklyn2 Test
Contents: Checks the condition of Brooklyn2 by performing the
audio signal and Ethernet checks.
Example of executing screen