Philips-DVP-4320-Service-Manual电路原理图.pdf

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1、DVD PLAYER DVP4320BL/93/12/51 3. Reading the USB or CD-ROM， in accordance with prompt，press ”OK” key to upgrade. Warning: Do not unplug the AC adapter during firmware upgrade to prevent flash corrupt of the set! Procedure to check SW version of your DVD Portable 1. OPEN 2. Press SETUP MENU 3. Select

2、 Preferences 4. Select Version Info 5. Press “OK” key1-32.0 Safety instruction 1. General safety Safety regulations require that during a repair: . Connect the unit to the mains via an isolation transformer. . Replace safety components indicated by the symbol Only by components identical to the orig

3、inal ones. Any Other component substitution (other than original type) May increase risk of fire or electrical shock hazard. Safety regulations require that after a repair, you must Return the unit in its original condition. Pay, in particular, Attention to the following points: . Route the wires/ca

4、bles correctly, and fix them with the mounted cable clamps . Check the insulation of the mains lead for external Damage . Check the electrical DC resistance between the mains Plug and the secondary side: 1) Unplug the mains cord, and connect a wire between The two pins of the mains plug. 2) Set the

5、mains switch the “on” position (keep the Mains cord unplug). 3) Measure the resistance value between the mains plug and the front panel, controls, and chassis bottom. 4) Repair or correct unit when the resistance measurement is less than 1M 5) Verify this, before you return the unit to the customer/

6、user (ref. UL-standard no. 1492). 6) Switch the unit “off”, and remove the wire between the two pins of the mains plug. 2. Laser safety This unit employs a laser. Only qualified service personnel May remove the cover, or attempt to service this device (due to possible eye injury). Laser device unit

7、Type :Semiconductor laser GaAIAs Wavelength :650nm (DVD) :780nm (VCD/CD) Output power :7mW(DVD) :10mW(DVD/CD) Beam divergence:60 degree Note: Use of controls or adjustments or performance of procedure other than those specified herein, may result in hazardous radiation exposure. Avoid direct exposur

8、e to beam.2-13.0 INSTRUCTION FOR USE You can download this information from the following websites: http:/ http:/ 3-14.0 MECHANICAL AND DISMANTLING INSTRUCTIONS The following guidelines show how to dismantle Step1:Remove 4 screws around the bottom Cover Figure 1 Step2:Open the mid-Cover(Figure 2 &3)

9、 Figure 2 4-1Figure 3 Step3:Remove the 14 screws on board(Figure 4) Figure 44-24.0 MECHANICAL AND DISMANTLING INSTRUCTIONS Spindle motor does not move Yes Yes NoNoNoNoYes Check whether “MD_VCC” (VCC) voltage is normal.Correct connectionCheck the MD_VCC power supplyCheck/Replace Q4Q5Check/ Replace U1

10、.Check opu focus1. Check U2 25pin RFO signals 2.If there are F+, F-, T+ and T- signals output from U1.Check/Replace the loaderYes Yes NoGoCheck whether laser voltage (1.9V for CD & 2.3V for DVD) on L21 & L22Check the FFC connection between 24P and the loader.1. Whether voltage on pin 23 of U2 varies

11、 between 0 and 3.3V (3.3V for CD and 0V for DVD), 2. Whether peripheral components are eroded or badly soldered.Trouble shooting chart Motor not move 5-1The power can not be on or off GoYes Yes NoNoThe power cant be on or offYes Replace the power boardCheck the power supply on the power board and th

12、e connection to to decoder board is normal.Check/Correct connectionWhether the connection to Standby Board is broken. Correct the connection Replace U1.NoNoYes Yes Check if the CON2 on the front board to J 5(6PIN) on the decoder board is in good contact.Whether there is 1.8V and 3.3V voltage difference on L5 and L7 Trouble shooting chart or correct the connection5-2