Philips-DVP-1120-Service-Manual电路原理图.pdf

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1、. Technical Specifications.1-2 . Safety Instructions, Warnings, Notes.1-3 . Mechanical and Dismantling Instructions.2-1 . Region Code, Software Version 50/60 Hz Power consumption to check the File Name. Note: It is required capital letter for the File System name. 2) Burn the data onto a blank CDR B

2、. Procedure for software upgrade: 1) Power up the set and insert the prepared Upgrade CDR. 2) The set will starts reading disc & response with the following display TV screen: Upgrade File DETECTED Upgrade? Press Play TO START. 3) Press button to confirm, then screen will display : Files coping UPGR

3、ADING 4) The upgraded disc will automatically out when files coping complete, then take out the disc. 5) About 1 minute later, the trace will automatically close when upgrading complete. C. Read out the software versions to confirm upgrading 1) Power up the set and press button on the remote control

4、. 2) Press button. The software version and other information are display on the TV screen as follows: Version XX.XX.XX.XX (main version) SUB-VER XX.XX.XX.XX (software version of application software) 8032 XX.XX.XX.XX Servo XX.XX.XX.XX (software version of Servo) RISC XX.XX.XX.XX DSP XX.XX.XX.XX Reg

5、ion Code XX 3-1 Caution: The set must not be power off during upgrading, in that case the decoder board will be damaged entirely. 4-1 Spindle motor does not move Yes Yes No No No No Yes Check whether “RFA5V” (+5V) voltage is normal. Correct connection Check the RFA5V power supply Check/Replace Q2 Q3

6、. Check/ Replace U1. Have no focus 1. Check U1 182pin FOCUS_PWM signals 2.If there are F+, F-, T+ and T- signals output from U7. Check/Replace the loader Yes Yes No Go Check whether laser voltage (2.3V for DVD & 1.9V for CD) on Collector of Q2 and Q3 Check the FFC connection between 24P and the load

7、er. 1.Whether voltage on pin 129 of U1 varies 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 no move FOCUS_PWN waveform 4-2 The power can not be on or off Go Ye s Yes No No The power cant be on or off Yes Re

8、pair the power board Check the power supply on the power board is normal. Check/Correct connection Whether the connection to K401 is broken. Correct the connection Replace U1. No No Yes Yes Check if the CN301 on the front board to CN5 on the decoder board is in good contact. Whether there is 0V and

9、3.3V voltage difference on Pin 192 PCON of U1. Trouble shooting chart 4-3 All output voltages on the power board is 0V or deviated.No No No Yes No U1(PIN 8 - Drain waveform) Replace F1 Replace C1&C2 if D1, D2, D3, D4 are normal. Check/ replace U1. Check whether U1 are eroded. All output voltages on

10、the power board is 0V or deviated Check whether there is 300V on C1 and C2. Check whether 100KHz oscillating signal on Pin6 of U1 Check if +5V, , +12V and -12V are short. Check whether the components in the short-circuit voltage are defected or eroded. Yes Yes Yes Yes U1(PIN 3 - RC waveform) Trouble

11、 shooting chart Check whether F1 is blown4-4Disc cannot be read. No Yes No Yes No Yes Yes No No Yes Disc cannot be read. Check the loaded circuit 1.Check voltage on pin 100 of U1 varies between 0 and 3.3V: 3.3V for CD 0V for DVD 2.Check whether peripheral components are eroded or defect Check the FF

12、C connection between 24P and the loader. Check U1 and peripheral components Re-solder or replace the defective parts Check the connection between U1 Correct connection Replace U1 or loader. Yes Check whether there is laser voltage (2.3V for DVD and 1.9V for CD) on Collector of Q2 &Q3 Check if there is RFO signal on pin10 of CN2. (The normal RFO signal is a clear reticulated wave) Trouble shooting chart Check U1, U7, and peripheral components are eroded or badly soldered.