Yamaha DME4io-ES Service Manual page 60

DME4io-ES/DME8i-ES/DME8o-ES
3-5. COMPONENT Test (NO. 05)
Contents: Automatically checks by comparing if the data agree with each other by looping back the audio output from
the CPU to the CPU with the DSP7.
Example of Executing Screen
*** 05. COMPONENT
OK!
NG: COMPONENT ERROR.!
EXIT:[ENTER]
Messages
• When disagreement error occurs between transferred and received data:
Troubleshooting
Check the signals connected to the following terminals in case of NG.
SIO32 (105Pin), SIO56 (134Pin) of DSP7 (DSP circuit board: IC153)
SIO32 (105Pin) of DSP7 (DSP circuit board: IC157)
TxD_SIO (193Pin), RxD_SIO (199Pin), SIOFSYNC (197Pin), PTD [3](210Pin) of CPU (CPU circuit board: IC002)
3-6. ATSC2 Test (NO. 06)
Contents: Writes, reads, and displays each register of ATSC2.
Example of Executing Screens
*** 06. ATSC2
OK.
EXIT:[ENTER]
*** 06. ATSC2
MODE REG. NG
adrs: 0x00
EXIT:[ENTER]
Detailed contents in case of NG are as follows:
• NG register name
• NG address • W/R data "adrs: 0x00 W: 0x00 R: 0x0F"
In case of NG, a register name and its port address where NG was detected fi rst are displayed along with the W/R
data contents.
Troubleshooting
Check the followings in case of NG.
Check malfunction of ATSC2 (DSP circuit board: IC403) and signal path (address bus, data bus, control signal, etc.)
connected between the ATSC2 and CPU (CPU circuit board: IC002).
60
***
***
***
W: 0x00 R: 0x0F
"MODE REG. NG"
Indicated in case of OK
Indicated in case of NG
NG: COMPONENT ERROR.!
Indicated in case of OK
Indicated in case of NG