Power On Sequence - Pioneer PDR-609 Service Manual

Power ON Sequence

model check
IC701(PDC066) 94 pin: 609/ System
IC701(PDC066) 92 pin: Legato
IC701(PDC066) 91 pin: High bit
Terminal TEST check
IC701(PDC066)
12pin: 2V or less
IC701(PDC066)
It is an adjustment mode
by 3.5V or more.
The backup data is read from EEPROM
(Input selector and digital Volume etc.)
MAIN LOOP
"POWER ON " display
Reset release of mechanism
control microcomputer (88 pin: "H")
Mechanism communication beginning
Setting of audio format
One second later
Mechanism communication
Initialization of AD/DA Converter
Mechanism communication
Input selection setting
RESET
Yes
No
Yes
12pin: 3.5V
No
• EEPROM communication
At the operation usually
• Mechanism communication
Key reception
Operation mode usually
The unit checker mode
IC7502(PDC066) 98 pin: EEP DATA
IC7502(PDC066) 100 pin: EEP CLOCK
IC701(PDC066) 7 pin: MACK (Output)
IC701(PDC066) 28 pin: MREQ (Input)
IC701(PDC066) 95 pin: MSI (Output)
IC701(PDC066) 96 pin: MSO (Input)
IC701(PDC066) 97 pin: MSCK (Input)
PDR-609
67