Operational Flow Chart - Pioneer Audio System Power Amplifier Service Manual

5

7.3.2 OPERATIONAL FLOW CHART

Reset Start---OFF ---Power ON
START
| Hard ware reset cancel
<<JUDGMENT>>
Test program check(Unit checker)
- Pin 27 HI/LOW input
Pin 27 HI input
Unit checker program
Pin 17 HI input
or
Pin 16 HI input
Error(Communication error)
| Forcibly OFF
5
6
Pin 27 LOW input
<<JUDGMENT>>
Back up, ACC confirmation
- Pin 17 ACC/Pin 16 Back up
Pin 17 HI input and Pin 16 HI input
• ACC/Back up ON
Main loop
<<JUDGMENT>>
Bus communication Normal/Error
Normal(Main unit communication normal)
<<JUDGMENT>>
System ON/OFF
OFF
- OFF status
=System ON waiting
• Power ON(Pin 66 H)
• Mute ON(Pin 1 H)
• BEEP output available
<<JUDGMENT>>
ACC/Back up ON/OFF
ACC ON/Back up ON
Main loop
6
7
Pin 17 LOW input
and
Pin 16 LOW input
Pin 17 LOW input
or
Pin 16 LOW input
Microcomputer oscillation stop
(Electronic power save)
ON
- ON status
=System OFF waiting
• Power ON(Pin 66 H)
• Mute OFF(Pin 1 L)
• BEEP output available
<<JUDGMENT>>
DSP error confirmation
• communication error:Serial IF
• processing error:Pin 68
Normal operation
GM-8027ZT/WL
7
8
A
B
C
D
DSP error
Error return
• DSP reset(Pin 9)
| About 1 second
E
F
49
8