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PHILIPS AZ7565
Service Manual


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

Description of PHILIPS AZ7565 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 “PROGRAM” and “STOP” depressed while turning POWER ON. • The display shows the software-version of the built-in microprocessor (e.g. “90S”). • The program is now in the main menu – various tests can be entered by pressing the corresponding buttons (see flow chart or detailed description of test programs below). 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. Three more test patterns are available. • To jump to the next pattern press the “PLAY” button. • 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 and remote control. • To enter the key & remote control test start service test program and press the “MODE” button. • The display shows “--”. • Press keys on the set resp. the remote control and check the 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). • To exit the key & remote control 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 “DSP” button. Note that the playback test can only be entered if the CD-door is closed. • The set now reads the TOC and switches to stand-by. • 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). Note: Errors can either be “fatal” or “non fatal”. Fatal errors always stop the playback, non fatal errors only cause a short interruption of the music. Fatal errors are displayed as long as the set is connected to the power source, non fatal errors are displayed till a new error occurs or a button is pressed. • To stop the playback test disconnect the set from the power source.

6. SERVO TEST Purpose: Check door- and inner-switch, movement of slide 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 door-switch; “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 “DSP” 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. 7. 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 “DSP” 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. 8. 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. • In case the disc speed is OK the radial test can be entered by pressing the “PLAY” button, to exit the discmotor test and return to the main menu press the “STOP” button.

9. 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 enter the error correction analysis press the “PLAY” button, to exit the radial test and return to the main menu press the “STOP” button. 10. ERROR CORRECTION ANALYSIS Purpose: Check the error status of the CD7 in double speed mode (measurement of block error rate, number of interpolations, a.s.o). • The display shows “H”. • The disc turns at double speed, mute is released and music is audible with twice the normal speed. Note: This test program is used for statistical analysis of the error correction of the CD7. As the test requires additional hard- and software it can´t be carried out at “normal” repair shops. • To exit the error correction analysis and return to the main menu press the “STOP” button.

5. IC-CHECK Purpose: Check communication between µP ↔ CD7 and µP ↔ NPC (DRAM controller). • To enter the IC-check start service test program and press the “PLAY” button. • The display shows “Cx ny”. “Cx” indicates result of CD7-check; “ny” indicates result of NPC-check. x,y = ”1” means that the test has been passed successfully; x,y = ”0” specifies an error during communication. • To enter the servo test press the “PLAY” button, to exit the ICcheck and return to the main menu press the “STOP” button.

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