Yamaha 01x Service Manual page 74

O1X
(2) Execution method in the normal state
When proper operation of all signal items is confirmed, the
screen returns to the execution select screen and "O" is displayed
in the check item space.
(3) Execution method in the faulty state
If ERROR appears on the display, press [KNOB-8]", and
checking comes to an end. The screen returns to the execution
select screen and "X" is displayed in the check item space.
12:DSP6
ERROR:xxxxxxxxxxxxx
(4) Item description and error message
1: CPU Interface (Data Bus 1) -> WCR register TxBusy
check
Error message: ERROR: TXBUSY
2: CPU Interface (Data Bus 2) -> WRITE/READ to TxBuf
check
Error message: ERROR: TSBUF W/R
3: CPU Interface (Chip Select, TXB) -> WRITE/READ to
TxBusy of DSP check
Error message: ERROR: CHIP SELECT
4: CPU Interface (Address Bus) -> Connection of Address
Bus check
Error message: ERROR: ADDRESS BUS
5: CPU Interface (BUS W/R Reg.) -> Bus, W/R register
check
Error message: ERROR: BUS W/R REG.
6: DRAM Interface (Data Bus 1) -> WRITE/READ to
DRAM check
Error message: ERROR: DRAM W/R
7: DRAM Interface (Address Bus) -> Check for reading
of a certain value written to all DRAMs
Error message: ERROR: DRAM ADDRESS BUS
(5) Check point when judged as NG
The devices that can be diagnosed by this check are as follows.
Circuit board Device name
DM CPU (IC101)
DM DSP6 (IC202)
DM DRAM (IC205, 206) DRAM for effect function
DM PLLP2 (IC602)
74
EXIT
Function
Control of DSP6
Control of effect function and DRAM
Address code to DSP6
4.13 DSP7 function check .....
(1) Outline
The check items on each signal related to DSP7 and judgment
for each item are displayed on the LCD.
13:DSP7
DSP7 TEST NOW...
The following signal items are checked one by one.
1: CPU Interface (Data Bus)
2: CPU Interface (Chip Select)
3: CPU Interface (Address Bus)
4: SIO Connection (DSP6 <->DSP7)
(2) Execution method in the normal state
When proper operation of all signal items is confirmed, the
screen returns to the execution select screen and "O" is displayed
in the check item space.
(3) Execution method in the faulty state
If ERROR appears on the display, press [KNOB-8], and
checking comes to an end. The screen returns to the execution
select screen and "X" is displayed in the check item space.
13:DSP7
ERROR:xxxxxxxxxxxxx
(4) Item description and error message
1: CPU Interface (Data Bus 1) -> WRITE/READ to TxBuf
check
Error message: ERROR: TXBUF W/R
2: CPU Interface (Chip Select) -> WRITE/READ to DSP
TxBusy check
Error message: ERROR: CHIP SELECT
3: CPU Interface (Address Bus) -> Connection of Address
Bus check
Error message: ERROR: ADDRESS BUS
4: SIO Connection (DSP6 <-> DSP7) -> DSP6 to DSP7
connection check
Error message: ERROR: DSP6 CONNECTION
(5) Check point when judged as NG
The devices that can be diagnosed by this check are as follows.
Circuit board Device name
DM CPU (IC101)
DM DSP6 (IC202)
DM DSP7 (IC210)
DM PLLP2 (IC602)
(13) DSP7
EXIT
Function
Control of DSP7
Communication with effect and DSP7
Communication with mixer and DSP6
Address decode to DSP7