Yamaha DM 1000, Service Manual

Page: 116 / 307

DM1000/MB1000/SP1000
116
1-1. PLLP2 test
Contents: Read/Write the Reg. (00, 0f, 10, 16) of the
PLLP2 to compare and check.
Example of execution screen
1-2. Battery test
Contents: The voltage of the backup battery by A/D
is measured and judgment is automatic.
Example of execution screen
1-4. DSP6 and SIO tests
1-5. DSP7, SIO, and ATSC2 tests
Contents: Read/Write the register of each DSP6 and
DSP7 and check whether the Data Bus and
Address Bus are good or bad.
Read/Write the DRAM and SDRAM of each
DSP6 and DSP7 via the registers and
compare and check.
Check the SIO connection between each
DSP and between the ATSC by the Send/
Receive signal.
Example of execution screen
1. Service Check
Common contents:
1) The contents of the Service Check Program and
examples of the screens executed for each check
item are displayed.
Common preparations:
1) Check objectives: DM1000 and MB1000
2) Cables: MIDI cable: 1
CANNON cable: 1
COAXIAL cable:
1
BNC cable: 1
3) DM1000 starting method:
While pressing the [AUX SELECT DISPLAY] and
[AUX4] keys, turn the power ON.
During normal operation, press the [SEL] key in the
CH “6 7 1 1” order and press the [STORE] key to
display the dialog box for confirmation. Select Yes
and press the [ENTER] key to restart the DM1000 in
the service check mode.
Service Check Connection Diagram
2TR IN DIGITAL1
2TR IN DIGITAL2
2TR OUT DIGITAL1
2TR OUT DIGITAL2
WORD CLOCK IN
WORD CLOCK OUT
TO HOST-USB
MIDI IN (MTC IN)
MIDI OUT
REMOTE
SMPTE IN
DM1000
SLOT1
SLOT2
MB1000
CONTROL
METER
--- PLLP2 ---
NG Adrs,Data BUS
EXIT ([DEC] Key->[ENTER] Key)
Certified voltage range
2.80 V to 3.50 V
Below 0.5 V is NG:
BATT NONE
EXIT ([DEC Key]->[ENTER Key])
--- BATT ---
NG BATT
NG:BATT (2.56V)
Details are displayed when
NG is determined.
When there are many NG
items, the display stops
after about 20 items.
OK DSP6,SIO
OK DSP7,SIO,ATSC2
--- DSP6 ---
1: CPU Interface (Data bus)
NG: TxBusy
1: CPU Interface (Data bus)
NG: BIF #01 0000 XXXX 0000･･･
--- DSP7 ---
EXIT ([DEC Key]->[ENTER Key])
All items are selected
automatically and cannot
be selected manually.
Items are displayed one
after another after “1:”
during execution.