Yamaha CL3 Service Manual page 139

The results are shown as below.
Indication in the right
Voltage
window
Less than 0.5 V NG BATT NONE
0.5 V to less than 2.8 V NG x.xxV BATT. Low
2.8 V to less than 3.5 V OK x.xxV
3.5 V or more NG x.xxV BATT. High
1-4. RTC test
Contents: Obtains and sets Real Time Clock.
Example of executing screen
The automatic check (AUTO) is executed. First, sets the
time preset in PC, waits for 1 seconds and judges OK if the
difference with the obtained time is within 1 to 3 seconds.
If it is not possible to set or obtain the time, or the time
difference is below 1 second or more than 3 seconds, judgment
is NG.
1-5. PLLPU test
Contents: Checks the condition of the address bus line (A0....
A4) and data bus line (D0....D15) by writing/
reading the register of PLLPU.
Example of executing screen
Remarks
No battery set
Voltage is lower than
specifi ed value
Voltage is higher than
specifi ed value
Display in case the check result is NG
1-6.
1-7.
Contents: Checks the condition of the address bus line and
Example of executing screen
NG MCS Wxx: yy Rxx: yy
Register number which is judged as NG
DSP6 test
DSP7 test
data bus line by writing/reading each register of
DSP6/DSP7.
Compares and checks DSP6 and DSP7 by writing /
reading to DRAM and SDRAM of each DSP6 and
DSP7 through registers.
Checks the SIO connection between DSPs (including
SHARC) by transmitting and receiving signals.
CL3/CL1
Read Data
Write Data
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