Dsp Ram Check; Version/Sum - Yamaha DSP-AX620 Service Manual

DSP-AX620

13. DSP RAM CHECK

This menu is used to self-diagnose whether or not YSS928 (IC801 of DSP circuit board) and external
RAM (IC802 of DSP circuit board) are connected properly.
During signal processing, the status before execution of this menu is maintained.
BUS CHECK:NOER

14. VERSION/SUM

There are two sub-menu items.
Indicates the program version, checksum of the microprocessor (IC501 of the operation circuit board).
The checksum is obtained by adding data for every 8 bits for each program area and expressing the
result as a 4-figure hexadecimal data.
The signals are processed using EFFECT OFF. (The L/R signals are output using ANALOG MAIN
BYPASS setting.)
VER. XXXXX
A:XXXX P:XXXX
27
[Remote control code: 7A—0A (CD SKIP +)]
Checks the address bus and the data bus, and indicates the connection condi-
tion.
"NOER" appears when no error is detected.
Indicate Function
Bus being checked
WAIT
No error detected
NOER
Short or open of data bus
DATA
Short or open of address bus
ADDR
Version [Remote control code: 7A—0D (CD REW)]
Release 1 figure / Main 2 figures / DSP 2 figures
Checksum [Remote control code: – – – – ]
A: All
P: Program area