SECTION 1. GENERAL ❏ SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2.
NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.
❏ ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.
SECTION 2. AUDIO PART ❏ ELECTRICAL TROUBLESHOOTING GUIDE 1. Power check flow INSERT POWER CORD. TURN ON CHECK POWER PLUG THE RED LED? AND POWER SUPPLY CIRCUIT . TURN POWER ON. IS POWER ON? CHECK POWER SUPPLY CIRCUIT . DOES INITIAL CHECK LASER CIRCUIT .
Page 9
2.AUDIO µ.COM CIRCUIT POWER ON Does VIDEO 1/2, TV, AUDIO, Does CD/DVD OPTICAL IN, COAXIAL IN, FM87.5 appear at FLT? appear at FLD? Does it appear Does LOADING DVD Error at appear at FLD? FLD? Check Does no Dise or Connector(PN902)if Reconnet it.
Page 10
3.FRONT CIRCUIT (1/2) POWER ON CHECK IF TURN ON RECONNECT IT. THE PN103/PN104 THE GREEN LED? (REFER TO NOTICE *1). IS OK? CHECK IF THE IS DIGITRON REFER TO SMPS PART. FRONT POWER ON NORMALLY? IS OK(*2). CHECK IF ALL BUTTENS ARE OK.
❏ DETAILS AND W VEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) MT1379 main clock is at 27MHz(X501) 2) MT1336 reset is high active - 3-8 -...
Page 34
3) RS232 waveform during procedure(Downloading) 4) Flash R/W enable signal during download(Downloading) - 3-9 -...
SECTION 4. EXPLODED VIEWS • CABINET AND MAIN FRAME SECTION NOTE) Refer to “SECTION 6 REPLACEMENT PARTS LIST” in order to look for the part number of each part.