Operational Flow Chart; Cleaning - Pioneer deh-p4400r Service Manual

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7.3 OPERATIONAL FLOW CHART

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Power ON
VDD=5V
19pin
bsens
93pin
bsens=L
asens
92pin
asens=L
dsens
2pin
dsens=L
adpw←H
22pin
ASENBO←H
71pin
csens
TE
77pin
L 13942296513
Starts
communication
with Grille
microcomputer.
SWVDD←H
23pin
Source keys
operative
Source ON
SYSPW←H
21pin
Completes power-on operation.
(After that, proceed to each source operation)

7.4 CLEANING

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Before shipping out the product, be sure to clean the following portions by using the perscribed cleaning tools:
Portions to be cleaned
CD pickup lenses
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- 2V<CSENS<4V ,
Source returns to the original one(before you open).
2V<CSENS<4V
CD, MD and TAPE loading functions are available.
Keys except for EJECT key are not available.
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.
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Cleaning tools
Cleaning liquid : GEM1004
Cleaning pater : GED-008
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DEH-P4400R/XN/EW
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