Error Code - Pioneer PDR-L77 Service Manual

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7.1.2 ERROR CODE

Laser Hour Meter Indication and Error Code Display for Service
The PDR-L77 can display the total turn-on time of the laser diode
and error codes for service.
When the TIME button is held down for about 5 seconds in stop
state in Normal mode, an FL display as shown below is obtained.
Display
∗∗∗∗ ∗∗
" 5100 "
Error code table for service
Code Symptom
No operation even when
TE
L 13942296513
H0
power is supplied.
(CHECK display)
H1
Pre-recording process does
not complete, and the tray
H2
does not open.
(CHECK display)
Pre-recording process
H5
disabled (CHECK display)
The unit stops during the
L∗ tray open/close operation.
(CHECK display)
The unit stops when PLAY
E∗ or REC/PAUSE starts.
(CHECK display)
The unit does not read the
P∗ inserted disc, and stops.
(CHECK DISC display)
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Error code Number
Contents of Error
Communication between mechanism
controller and mode controller is not
achieved.
Defective mechanism controller
terminals
Improper input voltage at the
mechanism-control terminals
(pins 22, 23, 24)
Improper IC303 data writing
Improper loading
Defective slider
• The pickup cannot be returned to the
specified position.
Defect in spindle
• Disc upside-down.
• Dirty or cracked disc
• Abnormal disc rotation
• No signal obtained from the disc
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2 9
8
Right 2 FL digits : Error code for service
The total turn-on time of the laser diode is displayed in the range
of 0 to 5100.
The error code for service is displayed as a number (ERROR
NUMBER), which follows a message "CHECK DISC" or
"CHECK". For details, see the table below.
Possible Cause
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• Improper soldering
3 6 7 1 3 1 5
• Pattern short
• Short-circuiting of parts
• Improper power supply
• Defect in IC303
• Defective tray position sensor
• Defective loading motor
• Improper soldering
• Pattern short
• Improper power supply
• Disconnected flexible cable
• Defective drive circuit
• Abnormal power supply
• Abnormal TOC position switch
• Improper soldering
• Defective spindle motor
• Defective spindle drive circuit
• Abnormal FG signals
• Defective WBL circuit
• Defective decoder circuit
• Unable to read ATIP or subcode
• High error rate
co
.
PDR-L77
9 4 2 8
Checkpoints
IC301 (PE5109A)
0 5 8 2 9 9 4 2 8
IC351 (PDJ014A)
IC371
(HD74HC573FP)
IC201 (PA9007A)
IC303 (PYY1196)
IC451 (M56788FP)
S601 (PSG1013)
IC451 (M56788FP)
IC401 (CXD2585Q)
∗1
PC651
(NJL5803K-F1)
IC451 (M56788FP)
IC401 (CXD2585Q)
∗1 : SERVO MECHANISM Assy
m
9 9
9 9
∗1
59