Power On Sequence - Pioneer XV-IS22DVD Service Manual

7.1.2 POWER ON SEQUENCE

Note 1 : IC No. or P∗∗ without name indicate the pin No.
of microcomputer (IC5501 : IF ASSY).
Standby states
POWER ON
Power is ON.
Transmit the bus data.
Starts the LCD communication (∗2)
DECK control IC starts
the data transfer.
Initialize the DECK.
Transfer the Function, Volume, BASS
and TREBLE data to the volume IC. (∗3)
Is CD door open ?
Is P57 and P58 at "H" level ?
Close the CD door.
Function : DVD (∗4)
Initial setting of DVD microcomputer IC.
P84 DVD ON/OFF : "H"
Perform the following process after
4.9 seconds after the POWER ON.
Release the system MUTE.
P73 SYSMUTE : "H"
Perform the following process after
5.0 seconds after the POWER ON.
Release the speaker relay.
P77 SPCONT : "H"
P78 SYSPOWER : "H"
System bus communication (∗1)
Transfer the system POWER ON.
P86 VOLDATA
Microcomputer P87 VOLCLK
P88 EXPCE
No
Yes P99 : "H"
Function : TUNER (∗5)
Initialize the TUNER PLL IC.
P67 TXPOW : "H"
The condition that MUTE
is not released.
• VOLUME : 0
• DVD DECK Function : Under the STOP mode.
Note ;
∗1 : System bus communication
∗2 : Starts the LCD communication
∗3 : Transfer the Function, Volume, BASS
and TREBLE data to the volume IC.
∗4 : Initial setting of DVD control u-com.
Transfer
∗5 : Initialize the TUNER PLL IC
DECK Initialize Sequence
MOTOR ON
Is the DECK Head down ?
(Is the MODE SW OFF ?)
No
50 msec.
solenoid is ON ?
Tried 5 times ?
No
MOTOR OFF
XV-IS22DVD
P8 SCLK
P9 SDATA
P10 SREQ
P97 LCDCLK
P96 LCDCE
P95 LCDDAT
P85 VOLCE
P86 VOLDATA
P87 VOLCLK
P100 DVDCLK
P99 DVDDIN
P98 DVDDOUT
P82 XRDY1(u-com ready)
P27 LT11
P91 TXCE
P93 TXODAT
P92 TXCLK
P64 TXIDAT
Check P52 TC MODE
input is "L".
Yes
IC2601(BU4094) P12 is "H"
Yes
Retry it to 5 times.
IC2601(BU4094) P11 is "L"
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