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.
Page 4
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 3. DVD & AMP PART ELECTRICAL TROUBLESHOOTING GUIDE 1. System operation flow Power On 1. 8082 initializes SERVO, DSP & RISC registers 2. Write RISC code to SDRAM 3. Reset RISC Show LOGO Tray Closed? Tray Close to Closed position SLED at Inner Side? SLED Moves to Inner Position...
Page 25
2. Test & debug flow TEST Check the AC Vol tage Check the POWER PART Power PCBA (110V or 220V) Switch on the Power PCBA Is the DC Voltage outputs OK? (-44V, -22V, Check the POWER PART -26.5V, ±12V, 5.6V, 3.3V, 5V, 7V, 8V) Is 3.3V and 5V DC Check the regulators or diode.
Page 30
PWM IC Check connection between received correct data IC300 ABCK, ALRCK, stream? ASDAT Normal Check the related circuit of PWM IC out?(IC301) PWM.(Check Audio out Pins52, 54, 55, 59,62, 68 Check Digital Amp circuit (IC701, IC702, IC703, IC704)
Page 31
3. AUDIO µ-COM Circuit(DVD & AMP) POWER ON Does CD/DVD appear Does CD/DVD appear at FLD? at FLD? Does Loading appear Does it appear DVD Error at FLD? at FLD? Does no Dise or Time Check power part of Main Refer to SMPS.
Page 32
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) ES6698FD main clock is at 27MHz(X501) 3.8V, 27MHz FIG 1-1 2) ES6698FD reset is high active. Power Cord in 5.2VA PWR_CTL(SYSTEM µ-COM) IC501 PIN83) M_RESET(IC501 PIN 207) URST(IC501 PIN 188) FIG 1-2...
Page 33
4) Flash R/W enable signal during download(Downloading) FRD(IC500 PIN 28) FWR(IC500 PIN 11) FIG 1-4 2. SDRAM CLOCK 1) ES6698FD main clock is at 27MHz(X501) DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V (IC503 PIN 38) FIG 2-1 3-10...