Circuit Description - Pioneer KEH-M5500 UC Service Manual

'KEH-MS5500
22. CIRCUIT DESCRIPTION
Indicating an Error Number
If the CD should fail to operate in multi mode, or if an
error has taken place during the operation and resulted
in an error, the player will enter into the error mode. And
the cause of such error is numerically indicated.
This is aimed at assisting an analysis or a repair.
o Basic Means of Display
With ERROR indicated in "MODE" on P-BUS Display
date, an error code is transmitte by the use of MIN
and SEC.
identical date are transmitted with MIN and SEC.
e Examples of Head Unit Display
E-XX
(4 digits)
(2) Error Codes
Error Code Classification Mode Description Detail/Cause
+. +4 ——
10 ELECTRIC SET UP Carriage home failure Unmovable to and from the inner circumference
| — Home switch failed and/or carriage improper
i moved
11 i t Focus failure Focussing failed
~ Disk scarred or stained on the back or vibrat-
ing hard
a
12 t t SET UP failure Spindle failed to lock or subcode extraordinary
~ Spindle defective, disk other than audio and
ROM
30 t SEARCH Search time out Target address failed to reach
— Carriade/tracking improperly and/or disk
scarred
—
AO SYSTEM = Power failure Power overvoltage or short circuit detected
|
— Switching transistor defective and/or power
|
abnormal
! 660 An error upon ejection MAG SW release time has timeout.
60 An error while putting in and out Tray in/out time has timeout.
the tray Tray is caught when put in.
70 An error upon elevation Elevation time has timeout.
80 An error with an empty magazine No disk is available.
inserted
*lf TOC has failed to be read in, the operation will continue anyway.
Error Code AO is peculiar to the this unit and inapplicable to another future CD player.
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