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CLD- D925
6. SELF-DIAGNOSTIC FUNCTIONS
6.1 SELF-DIAGNOSTIC
FUNCTIONS
The
self-diagnostic
functions
automatically
display
an
error code on the TV screen and front panel fluorescent
display section when
there is an error. The customer
* * (OD)
checks
the error
code
and conveys
it to the service
personnel to make repairs more efficient.
can display the error code again by holding down the
key for 5 seconds (except a loading error
display). At that time, partial error is displayed with the
mechanism switch information.
* : If the Power Cord is unplugged, this function is not
lost with the EEPROM IC (IC102).
Self-diagnostic error code
Mechanism switch information
Fig.1
TV screen display
This table explains the information for analyzing the cause when an error occurs with the CLD player.
Setf-
diagnostic
Probable cause
rror code
Spindle
overcurrent
detection
error.
In the play state, overcurrent was detected in the spindle motor. Monitoring starts 5
seconds after the start of play or special playback mode, this error is detected if the
overcurrent port is "L" for 4 seconds.
«Motor NG
@At LD start-up, the rate of rotation calculated from the FG was less than 15 rpm for 5
consecutive seconds from the spindle run command.
@At CD start-up, there was less than 1/8th rotation even after 5 seconds had passed
FG
since the end of acceleration.
abnormality |@ During play search, CD : subcordes are being read/LD : Phillips codes are being
read and the spindle is locked, but a state in which the rate of rotation calculated
from the FG was less than 15 rpm continued for 5 seconds or more. In the above
case, it is judged that an abnormality has occurred in the FG sensor and that
accurate rotation rate calculation has become impossible.
*FG sensor abnormality, FG
signal not coming to
mechanism controller
*FG sensor clogged
*Rubbing between FG sensor
and slit
*Turntable dropped
*FG slit deposition NG
@At LD start-up, the speed did not reach 1200 rpm within a certain time (12 seconds)
after the spindle run command.
@At CD start-up, a certain speed (313 rpm) was not reached within 6 seconds from
the end of spindle acceleration.
* Spindle motor NG
*Commutator NG
* Bearing too tight
¢Power supply NG
« — 5V not fed from POWER
SUPPLY assy
*Parts shorted
* Tilt switch 1, 2, 3 abnormal, so
til/loading state not read in
correctly
* Tilt/loading mechanism
mechanically locked
*Drive IC NG
* Power supply NG
Partial short
error
Power supply | — 5V power supply abnormality detected.
abnormality
| The power supply abnormality port is constantly monitored and if its signal stays high
error
for about 1 second consecutively, the power supply
is judged to be abnormal.
H1
H2
AO
Loading
error
62
@ When loading operation goes over time (approx. 10 sec.).
@ When assist at disc sense entry ends and is not tilt neutral.
@ When assist at set up entry ends and is not tilt neutral.
* Slider ceased being able to run
«The slider mechanism is
mechanically locked and can
no longer move to its target.
*Slider position switch NG
*Fiexible cable pulled out
*Drive IC NG
*Power supply abnormal
During slider movement, a time over-run occurred (track count search 20 seconds,
mandatory movement 10 seconds)
* Disc sandwiched
*Disc shifted
*Spindie motor NG
*Disc scratched or dirty
defocused during start-up
*Two discs loaded
*PU actuator NG
* Tilt sensor NG
* Tilt neutral NG
(tilt base NG)
@ During LD setup, after 1/8th rotation. the track count during 1/8 rotation exeeded
511.
Miss clamp | @ During start-up, the focus was lost once and refocusting was attempted, but the
focus could not be locked.
@ Two FG pulses did not come within 800 ms from from the start of LD start-up.
@ The disc clamp operation did not end within 5 seconds.
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