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2-3
SERVICE TEST PROGRAM
1. PRELIMINARY SETUP � To enter the service test program hold the keys �PLAY� and �STOP� depressed while turning POWER ON. � The display shows the software-version of the built-in microprocessor (e.g. �85S�). � The program is now in the main menu � various tests can be entered by pressing the corresponding buttons (see flow chart on next page or detailed description of test programs below).
5. SERVO TEST Purpose:Check door- and inner-switch, movement of slide servo and acceleration of discmotor. � To enter the servo test start service test program and press the �PLAY� button. � The display shows �S xy�. �x� indicates state of doorswitch; �y� indicates state of inner-switch. x,y = �1� means switch is open. � To move slide outside hold the �NEXT� button depressed. � To move slide inside hold the �PREV� button depressed. � To accelerate the discmotor clockwise hold the �MODE� button depressed. � To accelerate the discmotor counter-clockwise hold the �PROG� button depressed. � To enter the focus test press the �PLAY� button, to exit the servo test and return to the main menu press the �STOP� button.
2. DISPLAY TEST Purpose:Check the internal display driver of the µP and the display segments. � To enter the display test start service test program and press the �NEXT� button. � The display shows test pattern 1, all display segmants are switched on. � To exit the display test and return to the main menu press the �STOP� button.
3. KEY & REMOTE CONTROL TEST Purpose:Check operation of keys, cord remote control and IR-remote control. � To enter the key & remote control test start service test program and press the �MODE� button. � The display shows �--�. � Hold keys on the set resp. the remote control depressed and check corresponding key codes on the display of the CD-player resp. the test patterns on the display of the remote control. Codes and patterns can be found in table 1 (see flow chart on next page). � To exit the key & remote control test and return to the main menu press the �STOP� button.
6. FOCUS TEST Purpose:Check movement of lens and operation of focus servo. � The focus servo loop is switched on and the set starts searching the focus. If the focus is OK the display shows �-F�, else �-F�. � When the disc is turned manually �focus noise� is audible. � To move slide outside hold the �NEXT� button depressed. � To move slide inside hold the �PREV� button depressed. � To accelerate the discmotor clockwise hold the �MODE� button depressed. � To accelerate the discmotor counter-clockwise hold the �PROG� button depressed. � In case the focus is OK the discmotor test can be entered by pressing the �PLAY� button, to exit the focus test and return to the main menu press the �STOP� button.
4. PLAYBACK TEST WITH ERROR ANALYSIS Purpose:Analyse errors that occur during playback. � To enter the playback test start service test program and press the �PROG� button. Note that the playback test can only be entered if the CD-door is closed. � The set reads the TOC and switches to stand-by mode. � Press the �PLAY� button to start the error analysis. As long as the playback is free of errors the display shows track and time information as in normal play-mode. In case of an error a corresponding error code will be displayed. The meaning of this error code can be found in table 2 (see flow chart on next page). Note: Errors can either be �fatal� or �non fatal�. Fatal errors lead to a stop of the playback while non-fatal errors only cause a short interruption of music. Fatal errors are displayed as long as the set is connected to the power source, non fatal errors are displayed untill a new error occurs or a button is pressed. � To stop the playback test disconnect the set from the power source.
7. DISCMOTOR TEST Purpose: Check speed regulation of discmotor. � The speed regulation is switched on and the discmotor starts rotating. If the speed reaches 75% of the nom. speed the display shows �-d�, else �-d�. Note: During this test the µP displays the speed-flag of the CD7. As this IC can only monitor a small range of speed deviation the displayed information is not very reliable. In case of doubt check disc motor control circuit. � To enter the radial test press the �PLAY� button, to exit the discmotor test and return to the main menu press the �STOP� button.
8. RADIAL TEST Purpose: Check if radial loop locks and an audio signal is output. � The display shows �rd�. � The radial servo loop is switched on, mute is released and an audio signal is audible. � To jump 10 tracks outside press the �NEXT� button. � To jump 10 tracks inside press the �PREV� button. � To exit the radial test and return to the main menu press the �STOP� button.
CS 46 165
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