Error Code - Pioneer PDR-L77 Service Manual

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
H0
power is supplied.
H1 (CHECK display)
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
tray open/close operation.
L
(CHECK display)
The unit stops when PLAY
or REC/PAUSE starts.
E
(CHECK display)
The unit does not read the
P inserted disc, and stops.
(CHECK DISC display)
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
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
• Improper soldering
• 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
PDR-L77
Checkpoints
IC301 (PE5109A)
IC351 (PDJ014A)
IC371
(HD74HC573FP)
IC201 (PA9007A)
IC303 (PYY1196)
IC451 (M56788FP)
S601 (PSG1013) 1
IC451 (M56788FP)
IC401 (CXD2585Q)
1
PC651
(NJL5803K-F1)
IC451 (M56788FP)
IC401 (CXD2585Q)
1 : SERVO MECHANISM Assy
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