Zenith-DVD5201-cd-sm电路图 维修手册.pdf

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1、SERVICE MANUAL Product Type:DVD Player Chassis:DVD2 Manual Series: VR166 Manual Part #: 923-03461 Model Line:D Product Year:2001 OVERVIEW .5 DISASSEMBLY .8 MECHANISM .10 ELECTRICAL. 14 PARTS.28 DIAGRAMS .37 SCHEMATICS .38 Published by Technical Publications Zenith Electronics Corporation P.O. Box 24

2、0007 Huntsville, Alabama 35824 Copyright June 2001 by Zenith Electronics Corporation Made/Printed in the U.S.A. Model Series: CONTENTS DVD5201 DVD5591 RadioFans.CN 收音机爱 好者资料库 VR166 - 923-03461 2 DVD2 - SAFETY PRODUCT SAFETY GUIDELINES IMPORTANT SAFETY NOTICE This manual was prepared for use only by

3、properly trained audio-visual service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from Zenith Electronics Corporation. All components should be replaced only with types identical to those in the original circui

4、t and their physical location, wiring and lead dress must conform to original layout upon completion of repairs. Special components are also used to prevent x-radiation, shock and fire hazard. These components are indicated by the letter “x” included in their component designators and are required t

5、o maintain safe performance. No deviations are allowed without prior approval by Zenith Electronics Corporation. Circuit diagrams may occasionally differ from the actual circuit used. This way, implementation of the latest safety and performance improvement changes into the set is not delayed until

6、the new service literature is printed. CAUTION: Do not attempt to modify this product in any way. Never perform customized installations without manufacturers approval. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury. Service work should be

7、performed only after you are thoroughly familiar with these safety checks and servicing guidelines. GRAPHIC SYMBOLS The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature. The lightning flash with arro

8、whead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magnitude to constitute a risk of electric shock. The pictorial representation of a fuse and its rating within an equilateral triangle

9、is intended to convey to the service personnel the following fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE. SERVICE INFORMATION While servicing, use an isolation transformer for protec

10、tion from AC line shock. After the original service problem has been corrected, make a check of the following: FIRE AND SHOCK HAZARD 1. Be sure that all components are positioned to avoid a possibility of adjacent component shorts. This is especially important on items trans- ported to and from the

11、repair shop. 2. Verify that all protective devices such as insulators, barriers, covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled per the original design. Be sure that the safety purpose of the polarized line plug has not been defeated. 3. Soldering must

12、be inspected to discover possible cold solder joints, solder splashes, or sharp solder points. Be certain to remove all loose foreign particles. 4. Check for physical evidence of damage or deterioration to parts and compo- nents, for frayed leads or damaged insulation (including the AC cord), and re

13、place if necessary. 5. No lead or component should touch a receiving tube or a resistor rated at 1 watt or more. Lead tension around protruding metal surfaces must be avoided. 6. After reassembly of the set, always perform an AC leakage test on all exposed metallic parts of the cabinet (the channel

14、selector knobs, antenna terminals, handle and screws) to be sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner: Connect a 1500 ohm, 10

15、 watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a non-pola

16、rized adaptor and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately. X-RADIATION 1.Be sure procedur

17、es and instructions to all service personnel cover the subject of x-radiation. The only potential source of x-rays in current TV receivers is the picture tube. However, this tube does not emit x-rays when the HV is at the factory-specified level. The proper value is given in the applicable schematic

18、. Operation at higher voltages may cause a failure of the picture tube or high-voltage supply and, under certain circumstances may produce radiation in excess of desirable levels. 2.Only factory-specified CRT anode connectors must be used. 3.It is essential that the service personnel have available

19、an accurate and reliable high-voltage meter. 4.When the high-voltage circuitry is operating properly, there is no possibility of an x-radiation problem. Every time a color chassis is serviced, the brightness should be run up and down while monitoring the high voltage with a meter, to be certain that

20、 the high voltage does not exceed the specified value and that it is regulating correctly. 5.When troubleshooting and making test measurements in a product with a problem of excessively high voltage, avoid being unnecessarily close to the picture tube and the high voltage power supply. Do not operat

21、e the product longer than necessary to locate the cause of excessive voltage. 6.Refer to HV, B+, and shutdown adjustment procedures described in the appropriate schematics and diagrams (where used). IMPLOSION 1.All direct view picture tubes are equipped with an integral implosion protection system;

22、take care to avoid damage during installation. 2.Use only the recommended factory replacement tubes. TIPS ON PROPER INSTALLATION 1.Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf space over, or close to, a heat duct, or in the path of heated air flow. 2.Avoid co

23、nditions of high humidity such as: outdoor patio installations where dew is a factor, near steam radiators where steam leakage is a factor, etc. 3.Avoid placement where draperies may obstruct venting. The customer should also avoid the use of decorative scarves or other coverings that might obstruct

24、 ventilation. 4.Wall- and shelf-mounted installations using a commercial mounting kit must follow the factory-approved mounting instructions. A product mounted to a shelf or platform must retain its original feet (or the equivalent thickness in spacers) to provide adequate air flow across the bottom

25、. Bolts or screws used for fasteners must not touch any parts or wiring. Perform leakage tests on customized installations. 5.Caution customers against mounting a product on a sloping shelf or in a tilted position, unless the receiver is properly secured. 6.A product on a roll-about cart should be s

26、table in its mounting to the cart. Caution the customer on the hazards of trying to roll a cart with small casters across thresholds or deep pile carpets. 7.Caution customers against using a cart or stand that has not been listed by Underwriters Laboratories, Inc. for use with its specific model of

27、television receiver or generically approved for use with TVs of the same or larger screen size. 8.Caution customers against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous consequences to home and family. A.C. Voltmeter 1500 OHM 10 W

28、ATT Place this probe on each exposed metal part. Good Earth Ground such as the Water Pipe, Conduit, etc. 0.15uF RadioFans.CN 收音机爱 好者资料库 VR166 - 923-03461 3 DVD2 - TOC TABLE OF CONTENTS OVERVIEW .5 FEATURES .5 SPECIFICATIONS .5 OUTPUTS .5 PACKAGE CONTENTS.6 SERVICING PRECAUTIONS.7 GENERAL SERVICING P

29、RECAUTIONS .7 INSULATION CHECKING PROCEDURE.7 ELECTROSTATICALLY SENSITIVE (ES) DEVICES .7 DISASSEMBLY .8 MECHANISM .10 ELECTRICAL. 14 BLOCK DIAGRAMS . 14 TROUBLESHOOTING . 18 PARTS.28 DIAGRAMS .37 DVD5201/5591 EXPLODED VIEW .37 SCHEMATICS .38 DVD5201/5591 POWER SUPPLY CIRCUIT .38 DVD5201/5591 DVD AN

30、D DSP CIRCUIT .39 DVD5201/5591 DRIVE AND RF CIRCUIT .40 DVD5201/5591 MICRO CIRCUIT.41 DVD5201/5591 MEMORY CIRCUIT .42 DVD5201/5591 TIMER CIRCUIT .43 DVD5201 AUDIO/VIDEO CIRCUIT.44 DVD5591 AUDIO/VIDEO CIRCUIT.45 DVD5201 JACK CIRCUIT .46 DVD5591 JACK CIRCUIT .47 DVD5201/5591 MAIN PCB LAYOUT .48 DVD520

31、1/5591 PCB LAYOUTS.49 RadioFans.CN 收音机爱 好者资料库 OVERVIEW VR166 - 923-03461 5 DVD2 - OVERVIEW FEATURES 5 Disc Changer MP3 Decoding DTS/Dolby Digital Capable Component Video Output Universal Remote Control with Shuttle Zoom (4X, 16X) Still Pause and Frame Advance EZ Search, EZ Scan with Marker Automatic

32、 Aspect Ratio Control Parental Control SPECIFICATIONS Power supply . AC120V, 60Hz Power consumption . 16W Mass . 5.7kg(12.6lbs) External dimensions . 430 x 118 x 381 (W x H x D) Signal system. NTSC Laser Semiconductor. lDVD Semiconductor laser, wavelength 650nm Frequency range (audio). 4Hz - 20kHz S

33、ignal-to-noise ratio (audio) . More than 100dB (EIAJ) Audio dynamic range (audio). More than 90dB (EIAJ) Harmonic distortion (audio) . 0.008% Wow and flutter . Below measurable level (less than +0.001%(W.PEAK) (EIAJ) Operations Temperature : . 5C(41F) to 35C(95F), Operation status : . Horizontal OUT

34、PUTS Video outputs. 1.0V(p-p), 75W, negative sync., RCA jack x 1 S video outputs . (Y)1.0V(p-p), 75W, negative sync, Mini DIN 4-pin x 1 (C)0.286V(p-p), 75W Component video output. (Y)1.0V(p-p), 75W,negative sync., RCA jack x 1 (Pb)/ (Pr) 0.7V(p-p), 75W Audio output (digital audio) . 0.5V(p-p), 75W,

35、RCA jack X 1 Audio output (analog audio) . 2.0Vrms (1kHz, 0dB), 330W, RCA jack (L, R) x 2 *Designs and specifications are subject to change without notice. *Weight and dimensions shown are approximate. OVERVIEW VR166 - 923-03461 6 DVD2 - OVERVIEW OVERVIEW PACKAGE CONTENTS BATTERY 808 PACKING SHEET 8

36、04 PACKING OPTIONAL PARTS 803 811 812 OWNERS MANUAL 810 CABLE SET ASSY 801 REMOCON 900 BOX CARTONX 802 PACKING 803 VR166 - 923-03461 7 DVD2 - SERVICING SERVICING SERVICING PRECAUTIONS Before servicing the DVD covered by this service data (and its supplements and addendums), read and follow the safet

37、y precautions. If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions in this publication, always follow the safety precautions. Remember, safety first. GENERAL SERVICING PRECAUTIONS 1) Always unplug the DVD AC power cord from the AC

38、 power source before: a) Removing or reinstalling any component, circuit board, module, or any other assembly. b) Disconnection or reconnecting any internal elec- trical plug or other electrical connection. c) Connecting a test substitute in parallel with an elec- trolytic capacitor. Caution: A wron

39、g part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2) Do not spray chemicals on or near this DVD or any of its assemblies. 3) Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate con- t

40、act cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft ap- plicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4) Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this serv

41、ice manual might be equipped. 5) Do not apply AC power to this DVD and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. 6) Always connect test instrument ground lead to the appropriate ground before connection the test in- strument positive lead.

42、Always remove the test in- strument ground lead last. INSULATION CHECKING PROCEDURE Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter (500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachm

43、ent plug and accessible conductive parts should be more than 1M-ohm. Accessible Conductive Parts including Metal pan-els, Input terminals, Earphone jacks, etc. ELECTROSTATICALLY SENSITIVE (ES) DEVICES Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are call