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PHILIPS AZ7268
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of PHILIPS AZ7268 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 8 (click to view)
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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