Pioneer DEQ-P9 Посібник з експлуатації - Сторінка 41
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7.3 OPERATIONAL DESCRIPTION
The DSP/DIR/DF/EVOL will be initialized, and the microcomputer will enter a normal operation. All other commands
entered by key operations are also received by IP-BUS communications, and DSP/EVOL settings are conducted. For
normal operations, the monitoring of the DSP error is conducted by communicating with the DSP at certain intervals.
When DSPPW does not become H
The XOUT(Pin10)/XIN(Pin12) of the microcomputer is not operating.
The microcomputer is in the STOP mode. Please verify the ASENSB
(Pin16)/BSENS(Pin15).
IP-BUS Communication
When sound is not emitted
Lock and Unlock of the DIR (DIRERR(Pin72) of the microcomputer)
Fixed to HIGH
Either the digital audio is abnormal, or the DIR IC is abnormal.
Becomes HIGH at certain intervals
Initialization of the microcomputer
When a DIR error or DSP error is detected, the microcomputer performs re-initialization.
In such circumstances, the DIRRST(Pin68)/DSPRST(Pin67) become LOW (for 4ms) at certain intervals (approximately 3
sec.).
The microcomputer is performing re-initialization.
DEQ-P9
With the IP-BUS communica-
tions, communication is con-
ducted in set intervals (a
refresh operation is conduct-
ed every five seconds), when
the Acc and Bup are ON (see
figure on the left).
When the IP-BUS communi-
cations are not performing
properly, the product does
not operate properly.
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