Loewe-Centros2172-dvd-sm 维修电路原理图.pdf
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1、SERVICEANLEITUNG DVD Recorder Service Manual. Manuel de Service. Manuale di Servizio. Instrucciones de servicio. Service-instructies. 230- 90434.936 CENTROS 2102 HD / CENTROS 2172 HD CENTROS 2102 Art.-Nr. 64502 CENTROS 2172 Art.-Nr. 64512 RadioFans.CN 收音机爱 好者资料库CONTENTSSECTION 1 . . . . SUMMARYSECTI
2、ON 2 . . . . CABINET & MAIN CHASSISSECTION 3 . . . . ELECTRICALSECTION 4 . . . . PARTS LISTRadioFans.CN 收音机爱 好者资料库1-1SECTION 1SUMMARYCONTENTSNEW FUNCTIONS OF DVD-RECORDER. 1-2PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-3SERVICING PRECAUTIONS. 1-4 General Servicing Precautions Insulatio
3、n Checking Prodedure Electrostatically Sensitive DevicesSERVICE INFORMATION FOR EEPROM IC SETTING. 1-5SPECIFICATIONS. 1-61-2NEW FUNCTIONS OF DVD-RECORDER SUMMARY OF PRODUCT- RECORDING FUNCTION OF DVD-RW AND DVD-R SPECIFICATIONS DVD-RW: VIDEO MODE AND VR MODE RECORD AVAILABLE DVD-R :VIDEO MODE RECORD
4、 AVAILABLE - DIGITAL DUBBING FUNCTION OF DV CAMCORDER BY USING DV TERMINAL (IEEE1394) RECORD, PLAY, FF/REW FUNCTION BY REMOTE CONTROL OF DV CAMCORDER - DVD PROGRESSIVE PLAY RESPONSE- VARIOUS FUNCTION RESPONSE OF DVD RECORDING (DISC NAVIGATION AND CONVENIENT PLAY,EDIT FUNCTION)- OUTSIDE INPUT AND TV
5、RECORDING AVAILABLE RECORDING SCREEN QUALITY :VR(HQ, SQ, LQ), VIDEO(HQ, SQ)- TV RESERVE RECORDING FUNCTION (AUTO MODE SETTING AVAILABLE FOR RECORDING INACCORDANCE WITH THE REMAINING DISC SPACE IN RESERVATION) SUMMARIZED EXPLANATION OF MAIN FUNCTION DVD RECORDING FUNCTION(VR MODE RECORD / VIDEO MODE
6、RECORD)1) VR MODE RECORD : MANUAL MODE RECORDING IN ACCORDANCE WITH VARIOUS EDITING FUNC-TION, REMAINING DISC SPACE AND PROGRAM TIME DVD-RW DISC RECORDED IN THE VR MODECAN BE PLAYED WITH A DVD PLAYER CORRESPONDING TO THE DVD-RW THERE IS ALSO A PLAY-ER TO BE PLAYED THROUGH FINALIZING. FOR THE DVD-RW,
7、 RECORDING AND EDITING IS AVAIL-ABLE AT THE SAME DEVICE EVEN AFTER FINALIZING.2) VIDEO MODE RECORDING : THERE IS NO EDITING FUNCTION SUCH AS VR MODE RECORDINGBUT VIDEO MODE RECORDING IS PLAYED IN A GAME DEVICE (FOR EXAMPLE, “PLAY STATION 2”)WITH PC, DVD PLAY FUNCTION CORRESPONDING TO DVD PLAYER, CAR
8、 DVD, DVD-ROM. TO PLAYIN ANOTHER DEVICE, FINALIZING IS REQUIRED. RECORDING, EDITING AND EDITING IS NOT POS-SIBLE AFTER FINALIZING. HOWEVER, RECORDING IS ALLOWED AT THE DVD-RW DISC IF ERASINGTHE TITLE FINALLY RECORDED AFTER FINALIZING.3) RECORDING MODE INITIALIZATION (A KIND OF FORMATTING): BEGINS IN
9、ITIALIZATION AFTERSELECTING RECORDING MODE AS VR OR VIDEO MODE BY USING INITIALIZATION FUNCTION OFTHE DISC SETTING MENU. INITIALIZES DEFAULT AS VR MODE FOR DVD-RW. RECORDS IT ASVIDEO MODE WITHOUT INITIALIZATION FOR VIDEO MODE.4) FINALIZE: BEGINS FINALIZE AT THE DISC SETTING MENU DURING STOP.1-3IMPOR
10、TANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-video servicetechnicians.When servicing this product, under no circumstances should the originaldesign be modified or altered without permission from LOEWE ElectronicsCorporation. All components should be replaced only
11、 with types identical tothose in the original circuit and their physical location, wiring and lead dressmust conform to original layout upon completion of repairs.Special components are also used to prevent x-radiation, shock and fire haz-ard. These components are indicated by the letter “x” include
12、d in their compo-nent designators and are required to maintain safe performance. No deviationsare allowed without prior approval by LOEWE Electronics Corporation.Circuit diagrams may occasionally differ from the actual circuit used. This way,implementation of the latest safety and performance improv
13、ement changesinto the set is not delayed until the new service literature is printed.CAUTION: Do not attempt to modify this product in any way. Never performcustomized installations without manufacturers approval. Unauthorized modi-fications will not only void the warranty, but may lead to property
14、damage oruser injury.Service work should be performed only after you are thoroughly familiar withthese safety checks and servicing guidelines.GRAPHIC SYMBOLSThe exclamation point within an equilateral triangle is intended toalert the service personnel to important safety information in theservice li
15、terature.The lightning flash with arrowhead symbol within an equilateral tri-angle is intended to alert the service personnel to the presence ofnoninsulated “dangerous voltage” that may be of sufficient magni-tude to constitute a risk of electric shock.The pictorial representation of a fuse and its
16、rating within an equi-lateral triangle is intended to convey to the service personnel thefollowing fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE ANDRATING AS MARKED NEAR EACH FUSE.SERVICE INFORMATIONWhile servicing, use a
17、n isolation transformer for protection from AC line shock.After the original service problem has been corrected, make a check of the fol-lowing:FIRE AND SHOCK HAZARD1. Be sure that all components are positioned to avoid a possibility of adjacentcomponent shorts. This is especially important on items
18、 trans-ported to andfrom the repair shop.2. Verify that all protective devices such as insulators, barriers, covers, shields,strain reliefs, power supply cords, and other hardware have been reinstalledper the original design. Be sure that the safety purpose of the polarized lineplug has not been def
19、eated.3. Soldering must be inspected to discover possible cold solder joints, soldersplashes, or sharp solder points. Be certain to remove all loose foreign par-ticles.4. Check for physical evidence of damage or deterioration to parts and compo-nents, for frayed leads or damaged insulation (includin
20、g the AC cord), andreplace if necessary.5. No lead or component should touch a high current device or a resistor ratedat 1 watt or more. Lead tension around protruding metal surfaces must beavoided.6. After reassembly of the set, always perform an AC leakage test on allexposed metallic parts of the
21、cabinet (the channel selector knobs, antennaterminals, handle and screws) to be sure that set is safe to operate withoutdanger of electrical shock. DO NOT USE A LINE ISOLATION TRANS-FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms pervolt or more sensitivity in the following manner: Con
22、nect a 1500 ohm, 10watt resistor, paralleled by a .15 mfd 150V AC type capacitor between aknown good earth ground water pipe, conduit, etc.) and the exposed metal-lic parts, one at a time. Measure the AC voltage across the combination of1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by
23、 using anon-polarized adaptor and repeat AC voltage measurements for eachexposed metallic part. Voltage measured must not exceed 0.75 volts RMS.This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti-tutes a potential shock hazard and must be corrected immediately.TIPS ON PROPER I
24、NSTALLATION1. Never install any receiver in a closed-in recess, cubbyhole, or closely fittingshelf space over, or close to, a heat duct, or in the path of heated air flow.2. Avoid conditions of high humidity such as: outdoor patio installations wheredew is a factor, near steam radiators where steam
25、leakage is a factor, etc.3. Avoid placement where draperies may obstruct venting. The customershould also avoid the use of decorative scarves or other coverings thatmight obstruct ventilation.4. Wall- and shelf-mounted installations using a commercial mounting kit mustfollow the factory-approved mou
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