55
XC-IS22CD
7.1.1 SEQUENCE AFTER THE POWER ON
Standby states
P78 SYSPOWER : "H"
The condition that MUTE
is not released.
• VOLUME : 0
• CD and DECK Function : Under a STOP of operation.
Microcomputer
DECK Initialize Sequence
P99 : "H"
No
No
No
Yes
Yes
Check P52 TC MODE
input is "L".
Retry it to two times.
IC2601(BU4094) P12 is "H"
IC2601(BU4094) P11 is "L"
Yes
Transfer
P86 VOLDATA
P87 VOLCLK
P88 EXPCE
System bus communication (
∗
1)
Transfer the system POWER ON.
Note 1 : IC No. or P
∗∗
without name indicate the pin No.
of microcomputer (IC5501).
Note ;
∗
1 : System bus communication
P8 SCLK
P9 SDATA
P10 SREQ
∗
2 : Starts the LCD communication
P97 LCDCLK
P96 LCDCE
P95 LCDDAT
∗
3 : Transfer the Function, Volume, BASS
and TREBLE data to the volume IC.
P85 VOLCE
P86 VOLDATA
P87 VOLCLK
∗
4 : Initial setting of CD decoder IC
P100 CDCLK
P99 CDDIN
P98 CDDOUT
P27 CDDS
∗
5 : Initialize the TUNER PLL IC
P91 TXCE
P93 TXODAT
P92 TXCLK
P64 TXIDAT
Does the DECK Head down ?
(Is the MODE SW OFF ?)
MOTOR ON
MOTOR OFF
500 msec.
solenoid is ON ?
POWER ON
Power is ON.
Transmit the bus data.
Initialize the DECK.
Initial setting of CD microcomputer IC.
DECK control IC starts
the data transfer.
Does CD door open ?
Is P57 and P58 at "H" level ?
Transfer the Function, Volume, BASS
and TREBLE data to the volume IC. (
∗
3)
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"
Is three times ?
Function : TUNER (
∗
5)
Initialize the TUNER PLL IC.
P67 TXPOW : "H"
Starts the LCD communication (
∗
2)
7. GENERAL INFORMATION
7.1 DIAGNOSIS
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