2-3
SERVICE TEST PROGRAM5. SERVO TEST
Purpose:Check door- and inner-switch, movement of slide
servo and acceleration of discmotor.
1. PRELIMINARY SETUPYTo enter the servo test start service test program and
YTo enter the service test program hold the keys OPLAY�press the OPLAY� button.
and OSTOP� depressed while turning POWER ON.YThe display shows OSxy�. Ox� indicates state of door-
YThe display shows the software-version of the built-inswitch; Oy� indicates state of inner-switch. x,y= O1� means
microprocessor (e.g. O85S�).switch is open.
YThe program is now in the main menu � various tests canYTo move slide outside hold the ONEXT� button depressed.
be entered by pressing the corresponding buttons (seeYTo move slide inside hold the OPREV� button depressed.
flow chart on next page or detailed description of testYTo accelerate the discmotor clockwise hold the OMODE�
programs below).button depressed.
YTo accelerate the discmotor counter-clockwise hold the
OPROG� button depressed.
2. DISPLAY TEST
Purpose:Check the internal display driver of the ?YP and theTo enter the focus test press the OPLAY� button, to exit the
display segments.servo test and return to the main menu press the OSTOP�
YTo enter the display test start service test program andbutton.
press the ONEXT� button.
YThe display shows test pattern 1, all display segmants are
switched on.6. FOCUS TEST
Purpose:Check movement of lens and operation of focus
YTo exit the display test and return to the main menu pressservo.
the OSTOP� button.YThe focus servo loop is switched on and the set starts
searching the focus. If the focus is OK the display shows
O-F�, else O-F�.
3. KEY & REMOTE CONTROL TESTYWhen the disc is turned manually Ofocus noise� is audible.
Purpose:Check operation of keys, cord remote control andYTo move slide outside hold the ONEXT� button depressed.
IR-remote control.YTo move slide inside hold the OPREV� button depressed.
YTo enter the key & remote control test start service testYTo accelerate the discmotor clockwise hold the OMODE�
program and press the OMODE� button.button depressed.
YThe display shows O--�.YTo accelerate the discmotor counter-clockwise hold the
YHold keys on the set resp. the remote control depressedOPROG� button depressed.
and check corresponding key codes on the display of the
CD-player resp. the test patterns on the display of theYIn case the focus is OK the discmotor test can be entered
remote control. Codes and patterns can be found in table 1by pressing the OPLAY� button, to exit the focus test and
(see flow chart on next page).return to the main menu press the OSTOP� button.
YTo exit the key & remote control test and return to the main
menu press the OSTOP� button.7. DISCMOTOR TEST
Purpose: Check speed regulation of discmotor.
YThe speed regulation is switched on and the discmotor
4. PLAYBACK TEST WITH ERROR ANALYSISstarts rotating. If the speed reaches 75% of the nom.
Purpose:Analyse errors that occur during playback.speed the display shows O-d�, else O-d�.
YTo enter the playback test start service test program and
press the OPROG� button. Note that the playback test canNote:During this test the ?P displays the speed-flag of the
only be entered if the CD-door is closed.CD7. As this IC can only monitor a small range of
YThe set reads the TOC and switches to stand-by mode.speed deviation the displayed information is not very
YPress the OPLAY� button to start the error analysis.reliable. In case of doubt check disc motor control
circuit.
As long as the playback is free of errors the display shows
track and time information as in normal play-mode. In caseYTo enter the radial test press the OPLAY� button, to exit the
of an error a corresponding error code will be displayed. Thediscmotor test and return to the main menu press the
meaning of this error code can be found in table 2 (see flowOSTOP� button.
chart on next page).
Note:Errors can either be Ofatal�or Onon fatal�. Fatal errors8. RADIAL TEST
lead to a stop of the playback while non-fatal errorsPurpose: Check if radial loop locks and an audio signal is
only cause a short interruption of music. Fatal errorsoutput.
are displayed as long as the set is connected to theYThe display shows Ord�.
power source, non fatal errors are displayed untill aYThe radial servo loop is switched on, mute is released and
new error occurs or a button is pressed.an audio signal is audible.
YTo jump 10 tracks outside press the ONEXT� button.
YTo stop the playback test disconnect the set from theYTo jump 10 tracks inside press the OPREV� button.
power source.
YTo exit the radial test and return to the main menu press
the OSTOP� button.
CS 46 165 |
ACEC
