Yamaha SB168-ES Service Manual page 54

SB168-ES
3-5. DSP7 Test
Contents
Checks the condition of address bus by writing/reading the
register of DSP7.
Checks the condition of data bus by writing/reading the
register of DSP7.
Checks the condition of Chip Select by writing/reading the
register of DSP7.
•
Screen Example
Output result
• Normal condition
Displays in the output window as follows.
Item Text indication
CPU Data Bus OK: DSP7 CPU Data Bus
CPU Address Bus OK: DSP7 CPU Address Bus
Chip Select OK: DSP7 Chip Select
• In case of failure
Displays in the output window as follows.
Item Text indication
CPU Data Bus NG: DSP7 CPU Adr xxxxxxxxh, Data xxxxh
CPU Address Bus NG: DSP7 CPU Adr xxxxxxxxh, Data xxxxh
Chip Select NG: DSP7 CPU Adr xxxxxxxxh, Data xxxxh
* The "Adr xxxxxxxxh" in the text indication shows an address
in hexadecimal notation.
* The "Data xxxxh" in text indication shows a write data in
hexadecimal notation.
54
3-6. WORD CLOCK Test
Contents
Checks Word Clock.
Preparation
Input WORD CLOCK to the test jig, NAI48-ES, using
WORD CLOCK generator.
Precautions
Check that the inspection patch is for nonPM.
•
Screen Example
Output result
• Normal condition
Displays in the output window as follows.
Item Text indication
INT48k OK: WC INT48k
EXT48k OK: WC EXT48k
• In case of failure
Displays in the output window as follows.
Item Text indication
INT48k NG: WC INT48k
EXT48k NG: WC EXT48k