Philips-CED-750-Service-Manual电路原理图.pdf

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1、 CED750/55/94DB-SL 0850 3141 785 33261Exploded View 1kHz,0dB,10kload)Subwoofer output voltage: 2.0V(CD play mode)Aux-in level: 1 500mVDimensions(WHD): 18858193mmWeight: 2.5kgDisc PlayerSystem: Disc digital audio systemFrequency response: 20Hz-20k HzSignal/noise ratio: 75dBTotal harmonic distortion:

2、Less than 0.3%(1KHz)Channel separation: 55dBVideo signal for mat: NTSC/PAL/AUTOVideo output: 1+/0.2VLCDScreen size: 7inches(16:9)Display resolution: 480234 dotsActive area: 154.0886.58mmDot pitch: 0.1070.370mmContrast ratio: 350Brightness: 200cd/mBluetoothCommunication system: Bluetooth Standard ver

3、sion 2.0Output: Bluetooth Standard Power Classer 2Maximum communication rangeLine of sight approx.10mFrequency band: 2.4GHz band(2.4000GHz-2.4835GHz)Modulation method: FHSSCompatible Hands-Free Profile(HFP)bluetooth Hands-Free Profile(HFP)profiles Advanced AudioDistribution Profile(A2DP)Audio Video

4、RemoteControl Profile(AVRCP)Supported SBC(Sub Band Codec),MP3codecs SBC(Sub Band Codec)ReceiveTransmitTunerFrequency range 87.5-108.0MHz(Eur) FM 65.0-74.0MHz OIRT87.5-107.9MHz(Ame)Frequency range 522-1620KHz(Eur) AM(MW) 530-1710MHz(Ame)Usable sensitivity 8uV FMUsable sensitivity 30uV AM(MW)(S/N=20db

5、)Frequency response 30Hz-15KHzStereo separation 30db(1KHzSignal/noise ratio 55dbNote:Specifications and design are subject to change without notice for product improvements.1-2MEASUREMENT SETUPTuner FMDUTRF GeneratorBandpassLF Voltmetere.g. PM5326250Hz-15kHze.g. 7122 707 48001 e.g. PM2534S/N and dis

6、tortion metere.g. Sound Technology ST1700BRi=50Use a bandpass filter to eliminate hum(50Hz,100Hz) and disturbance from the pilottone(19kHz,38kHz). Tuner AM (MW,LW)DUTRF GeneratorBandpassLF Voltmetere.g. PM5326250Hz-15kHze.g. 7122 707 48001 e.g. PM2534S/N and distortion metere.g. Sound Technology ST1

7、700BRi=50Frame aeriale.g. 7122 707 89001To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday s cage.Use a bandpass filter ( or at least a high pass filter with 250Hz) to eliminate hum ( 50Hz,100Hz ).DUTDUTLRLF Generatore.g. PM5110LEVEL METERe.g. Sennheiser UPM550

8、with FF-filterS/N and distortion metere.g. Sound Technology ST1700BLRLEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BUse Audio Signal Disc SBC429 4822 397 30184(replaces test disc 3) CassetteUse Universal Test Cassette CrO2 SBC419 4822 397 30069 or

9、 Universal Test Cassette Fe SBC420 4822 397 30071CD1-31-4SERVICE AIDSGBGBWARNINGAll ICs and many other semi-conductors aresusceptible to electrostatic discharges (ESD).Careless handling during repair can reduce lifedrastically.When repairing, make sure that you areconnected with the same potential a

10、s the massof the set via a wrist wrap with resistance.Keep components and tools also at thispotential.ESDCLASS 1LASER PRODUCTSafety regulations require that the set be restored to its originalcondition and that parts which are identical with those specified,be usedSafety components are marked by the

11、 symbol!.Lead free1-5INSTRUCTIONS ON CD PLAYABILITYSet remains closed!check playabilityNNNYYYcheck playabilityExchange CDM“fast“ lens cleaningplayabilityok?playabilityok?playabilityok?$Customer complaint“CD related problem“Check playabilityPlay a CDfor at least 10 minutesann lnfo for customer“SET OK

12、“$areturn set$ -$c For description-see following pages$bFor flap loaders(=access to CD drive possible)clesning method$c is recommended1-6Software version check & upgrade 2-1 2-1 Software version check Open the Settings menu, and then press the numeric keys ?43210?on the remote control in turn. A pic

13、ture contained version information will be displayed. MPEG upgrade 1. First, copy the upgrade files to SD card or USB storage device. To ensure success, add some media files larger than 8M such as MP3 to the storage device meanwhile. Upgrade Files: MPEG.BIN MCU.BIN BT.BIN 2. Insert the storage devic

14、e contained upgrade files into the player and the player will load the upgrade files automatically. Following picture will be displayed. 3. Following picture will be displayed after you select the MPEG upgrade option. 4. Touch upgrade to start upgrade process and following picture will be displayed.

15、 Meanwhile, Beep tone can be heard during the upgrade process. BT upgrade 1. First, copy the upgrade files to SD card or USB storage device. To ensure success, add some media files larger than 8M such as MP3 to the storage device meanwhile. Upgrade Files: MPEG.BIN MCU.BIN BT.BIN 2. Insert the storag

16、e device contained upgrade files into the player and the player will load the upgrade files automatically. Following picture will be displayed. 3. Following picture will be displayed after you select the BT upgrade option. 5. Touch Upgrade to start upgrade process and following picture will be displ

17、ayed. MCU upgrade 1. First, copy the upgrade files to a SD card or USB storage device. To ensure success, add some media files larger than 8M such as MP3 to the storage device meanwhile. 2. Insert the storage device contained upgrade files into the player and the player will load the upgrade files a

18、utomatically. Following picture will be displayed. 3. Following picture will be displayed after you select the MCU upgrade option. 4. Touch Upgrade to start upgrade process and following picture will be displayed. 5. When the upgrade process of MCU has been done, the player will reset automatically and the whole upgrade process is done. Upgrade Files: MPEG.BIN MCU.BIN BT.BIN Software version check & upgrade 2-2 2-2