Yamaha AV-S70 Service Manual page 7

Display
04 DSP Diag
05 Ver-A1.08
06 SUM[47a0]
07 PrCan-OFF
08 Pr!C–P–S–
09 Cors- St.
10 COR-Clear
Function
The DSP DIAG (self-diagnosis) mode is initiated. (Refer to page 7 for the details.)
Microprocessor version / date display
Example of microprocessor display
Example of microprocessor date display
What is displayed varies depending on the microprocessor software.
Check sum calculation display / re-calculation
All protection cancellation function ON/OFF
Protection operation history display / clear
C: Center unit amplifier voltage
P: Power circuit voltage
S: Switch side
–: Normal
x: Abnormal
ROM collection (EEPROM) check sum calculation/calculation start
When there is a data in the ROM collection area of EEPROM:
Example of display
When there is no data, "NON" appears on the display.
* The ROM collection (EEPROM) is utilized to cope with the data area for backup
and microprocessor bugs partially. The backup memory for the sound field or
the like will be retained semi-permanently even when the plug is disconnected.
No data is written in the parts mounted on the product as single units.
ROM collection (EEPROM) data clear / clear start
Display is provided only when there is data in the ROM collection area of EEPROM
st
1 time: Data clear confirmation (Clear-ON? displayed)
nd
2 time: Data clear execution (Clear:OK! displayed)
Clear-ON?" is displayed, do not use INPUT key for execution Clear-ON? Clear-ON?
After "Clear-ON? Clear-ON?
(because the program contents will be erased).
Using VOLUME + (UP) key and VOLUME - (DOWN) key, select another test
program.
* The IC for ROM collection has a role to help the microprocessor be upgraded. If
the written data is cleared, the old version will be restored.
05 Ver-A1.08
05 '99.10.15
09 Cors-288b
AV-S70/NX-SW70
6