Pioneer PDR-509 Manuale di servizio - Pagina 34
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PDR-555RW, PDR-V500, PDR-19RW, PDR-509
9. OPERATION DESCRIPTIONS
9.1 ABOUT POWER ON/OFF
9.1.1 Power-up (When the power outlet is
active)
9.1.1.1 Without Backup Power Supply. (When the
content of RAM of the microcomputer is
cleared. )
(1) The power turns on.
(2) XPFAIL becomes "H".
(3) The reset of the microcomputer then becomes "H" and the
microcomputer starts operating. Immediately after the
microcomputer starts operating, it confirm that XPFAIL = "H."
(3)-1 If XPFAI L= "L," the microcomputer immediately returns to
STOP mode (power-save mode). In this case, backup process
is not performed.
Power (IN)
XPFAIL (IN)
XRST (IN)
Falling of XPFAIL during this period cannot be
detected. See (3)-1.
9.1.1.2 With Backup Power Supply
(1) The power turns on.
(2) XPFAIL becomes "H," and the reset of the microcomputer
becomes "L" at the same time.
(3) The reset of the microcomputer then becomes "H," and the
microcomputer exits STOP mode and starts operating.
Immediately after the microcomputer starts operating, it confirm
that XPFAIL = "H."
(3)-1 If XPFAI L= "L," the microcomputer immediately returns
to STOP mode (power-save mode) again. In this case, backup
process is not performed.
Power (IN)
XPFAIL (IN)
XRST (IN)
Falling of XPFAIL during this period cannot be
detected. See (3)-1.
9.1.2 Power Down (When the power outlet
is not active or power failure occurs)
(1) The power starts turning off, and XPFAIL becomes "L" when
the power voltage decreases to some extent.
(2) Interrupted at XPFAI L= "L," and the current operating mode,
disc data, etc. are backed up.
(3) As the reset may become "L" about 3 ms after XPFAIL become
L," the microcomputer must enter STOP mode (power-save
mode) before that. (This is because resumption is made without
data backup if the microcomputer is reset before it enters STOP
mode.)
In STOP mode, the reset is pulled up by the backup power
supply.
34
Power (IN)
XPFAIL (IN)
XSVRST
Microcomputer
operation
XRST (IN)
9.2 ABOUT SERVO CONTROL
9.2.1 Seek Track 0
The sled is carried to the TOC area (home position).
Max.
3.4 sec
SLED drive
TOCP input
terminal
1
1
When TOCP is "H," the sled starts moving toward the inner
periphery.
2
When TOCP becomes "L," the sled moves toward the outer
periphery.
3
When TOCP becomes "H," the sled slowly moves toward the
inner periphery.
4
When TOCP becomes "L" (detected by an interruption), the
sled stops, and the operation finishes.
9.2.2 Focus ON
9.2.2.1 Without a Disc
200msec
Focus drive
1
1
Temporally judging FZC
2
Executing focus IN
About 850µs
It must be lower than
30 ms
Max.
Max.
300 ms
500 ms
2
3
4
250msec
700msec
2