Pioneer CD-8400, Service Manual

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PD-F957,PD-F907
40
7.2.3 ERROR HISTORY DISPLAY
(1) Disc No. A : Detail of error code at portion
<Note> The user display appears only when the normal operation cannot be returned even if the fail safe operation is executed after each
error occurs.
(2) Track No. B : Error sequence in portion
The display of 1 to 16 appears. The low number indicates the recently generated error. The error whose number is “1” was generated most
recently.
(3) Minute : Second No. C : Detail of error generation mode in portion
Indicates the internal mode in which the displayed error is generated. The upper digit in “minute : second” has the meaning.
User display Description
None A0 • A disc couldn’t be detected for playback after loading because;
No disc existed.
A disc was turned upside down.
A disc was dirty.
A disc was loaded incompletely.
• The focus got out of place during playback due to the crack
and stain on the disc.
None A1 • The servo mechanism couldn’t move to the desired tune
position within a fixed time during selection of a tune from
playback or during playback.
A3 • A disc couldn’t be loaded within a fixed time.
(A disc couldn’t be carried from the rack block.)
U1
A4 • A disc couldn’t be unloaded within a fixed time. (A disc couldn’t
be returned to the rack block.)
A2 • The LOADING mechanism couldn’t move to the desired disc
position within a fixed time during selection of a disc from
playback or during playback start from stop.
U2
A5 • The LOADING mechanism couldn’t be forcibly returned to
the home position (left position when viewed from the front)
within a fixed time after it is initialized or becomes NG.
None A6 • A disc couldn’t be normally rotated for playback after loading
because;
A disc was turned upside down.
A disc was dirty
A disc was loaded incompletely.
• A disc couldn’t be normally rotated during playback due to the
crack and stain on the disc.
User display Description
None A7 • Mechanism position just before the LOADING mechanism
shifts to the disc selection operation when the DCNT pin is
low. (The DCNT pin is usually high when the LOADING
mechanism is in the stop state. The mechanism position is
thus judged to have been shifted for some reason. The shifted
mechanism position may cause a failure.)
None A8 • Discrepancy has occurred between the detected disc position
and the current disc position during movement of the loading
mechanism. (The system may incorrectly counted the
waveforms of the DCNT and DPOS terminals. If counting is
incorrect, the position of the disc No. displayed does not match
the disc position counted.)
None A9 • Mechanism position during disc loading when the DCNT pin
is low. (The DCNT pin is usually high when the LOADING
mechanism is in the stop state. The mechanism position is
thus judged to have been shifted for some reason. The shifted
mechanism position may cause a failure.)
None AA • The pickup block cannot return to the innermost circumference
when the playback is
c
ompleted or another disc is shifted.
Digit of minute Digit of second
Display Contents Display Contents
0
*
Spindle stop operation 0
*
1
*
Disc return operation
2
*
Disc selection operation
3
*
Setup operation 1
*
4
*
CD-R setup operation
5
*
TOC read
6
*
Track search operation
7
*
Play
8
*
Pause
9
*
Manual search
During closing of the hood
and when the hood is com-
pletely close
During opening of the hood
and when the hood is com-
pletely open
Hood section
User display Description
U3 P0 The hood did not open within the specified time. The switch of
the hood was malfunctioning.
P1 The hood did not close within the specified time. The switch of
the hood was malfunctioning.
P2 The hood was attempted to be opened with force when it was
completely closed. The switch of the hood was malfunctioning.