Pioneer DEH-425 Manuale di servizio - Pagina 12

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1. Circuit Diagram and Pattern

DEH-59,52,525,49,42,4225,225,523,323,223

6.2 ERROR NUMBERS AND NEW TEST MODE

@ Error Number Indication

If the CD should fail to operate or if an error has taken place during operation the player will enter into the error

mode, and the cause of the error will be numerically indicated.

This is aimed at assisting in analysis or repair.

(1) Basic Means of Display

«With ERROR indicated in "MODE" on IP-BUS Display data, an error code is transmitted by the use of MIN and SEC.

The MIN and SEC data will be identical.

-Examples of Display

ER-XX

(2) Error Codes

Code

Carriage doesn't move to or from the innermost position

—Home switch failed and/or carriage immobile

— Defects, disc

upside-down, severe vibration

Spindle failed to lock or subcode unreadable

Subcode failure

—Spindle defective, defect, severe vibration

The disc is upside-down, defects, vibration

—Defects, disc

upside-down, severe vibration

Failed to reach target address

—Carriage/tracking defective and/or defects

Power overvoltage or short circuit detected

— Switching transistor defective and/or power abnormal

"defects" means scratches, dirt etc an the surface of the disc.

@ New Test Mode(aging operation and setup analysis)

The single CD player plays in normal mode. After being set up, it will display FOK (focus), LOCK (spindle), subcode,

sound skip, protection against a mechanical error or the like, occurrence of an error, cause and time of an expiry, if

any, (and disc number).

During the setup, the CD software operation status (internal RAM and C-point)is displayed.

(1) How to enter NEW TEST Mode

See the test mode flow chart Page 11.

(2) Relations of keys between TEST and NEW TEST Modes

Keys

BAND

Regulator ON | Regulator OFF

be,

eee

Time of occurrence / cause of error select

Te |

FW-xiCk

TRACK /FF

TR |

REV-KICK

Track-/REV

|_|

TRACKING CLOSE] SCAN

eee

TRACKING OPEN | REPEAT

FOCUS CLOSE

RANDOM

MANU

FOCUS MODE __| AUTO/MANU

TRACK No./ time of occurrence select

Mode Select

Operations, such as EJECT, CD ON/OFF, etc. are performed normally.