Operational Flow Chart; Cleaning - Pioneer DEH-P840MP Service Manual

7.3 OPERATIONAL FLOW CHART

Power ON
VCC=5V
Pin 16/17/62/99
bsens
Pin 73
asens
Pin 74
ASENBO←H
Pin 82
Starts
communication
with Grille
microcomputer.
SWVDD←H
Pin 40 (OEL)
Pin 79 (LCD)
Source keys
operative
Source ON
SYSPW←H
Pin 23
Completes power-on operation.
(After that, proceed to each source operation)

7.4 CLEANING

Before shipping out the product, be sure to clean the following portions by using the prescribed cleaning tools:
Portions to be cleaned
CD pickup lenses
bsens=L
asens=L
300ms
300ms
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 300msec, the oscillator
may be defective.
Cleaning tools
Cleaning liquid : GEM1004
Cleaning paper : GED-008
DEH-P840MP,P8400MP,P8450MP
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