Yamaha PX10 Service Manual page 40

PX10/PX8/PX5/PX3
5-7. DSP (IC104)
5-7-1. I2C Bus
Contents Via I2C Bus which is a communication path with a
microcomputer, it inspects automatically using the
register of DSP.
Advance preparation None.
〈 Service inspection screen 〉
Left end✽is a selecting cursor.
The fault location at the time of FAIL
I2C Bus (SCL-SPR, SCA-SPR)
40
5-7-2. /DSP-IRQ
Contents The function to assert a /DSP-IRQ signal is
automatically inspected via the register of DSP.
Advance preparation None.
〈 Service inspection screen 〉
Left end✽is a selecting cursor.
The fault location at the time of FAIL
/DSP-IRQ