Zenith-DVB352-dvd-sm电路图 维修手册.pdf

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1、SERVICE MANUAL Product Type: DVD VIDEO PLAYER Chassis: DPM-4 (MD) Manual Series: DVB352 Manual Part #: 3829RGN002K Model Line: D Product Year: 2003 Summary 1 Cabinet & Main Chassis2 Electrical3 Parts List4 Published September 2003 by Technical Publications Zenith Electronics Corporation 201 James Re

2、cord Road Huntsville, Alabama 35824-1513 Copyright 2003 by Zenith Electronics Corporation Printed in U.S.A Model Series: CONTENTS DVB352 . . . . RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 1-1 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-2 SERVICING PRECAU

3、TIONS. 1-3 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SPECIFICATIONS. 1-4 RadioFans.CN 收音机爱 好者资料库 1-21-3 IMPORTANT SAFETY NOTICE This manual was prepared for use only by properly trained audio-video service technicians. When servicing this product

4、, 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 circuit and their physical location, wiring and lead dress must conform to original

5、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” included in their compo- nent designators and are required to maintain safe performance. No deviations are allowed without prior appro

6、val 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 the new service literature is printed. CAUTION: Do not attempt to modify t

7、his product in any way. Never perform customized installations without manufacturers approval. Unauthorized modi- fications will not only void the warranty, but may lead to property damage or user injury. Service work should be performed only after you are thoroughly familiar with these safety check

8、s 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 arrowhead symbol within an equilateral tri- angle is intended to alert the s

9、ervice personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magni- tude to constitute a risk of electric shock. The pictorial representation of a fuse and its rating within an equi- lateral triangle is intended to convey to the service personnel the following fuse

10、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 protection from AC line shock. After the original service problem has be

11、en corrected, make a check of the fol- lowing: 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 repair shop. 2. Verify that all protective devices such as insula

12、tors, 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 be inspected to discover possible cold solder joints, solder spla

13、shes, 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 (including the AC cord), and replace if necessary. 5. No lead or component should touch a high

14、 current device 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 selector knobs, antenna terminals, handle and screws) to b

15、e sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANS- FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type cap

16、acitor between a known good earth ground water pipe, conduit, etc.) and the exposed metal- lic 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-polarized adaptor and repeat AC voltage measurements for e

17、ach exposed 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 INSTALLATION 1. Never install any receiver in a closed-in recess, c

18、ubbyhole, or closely fitting shelf 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 where dew is a factor, near steam radiators where steam leakage is a factor, etc. 3. Avoid placement where draperies m

19、ay obstruct venting. The customer should also avoid the use of decorative scarves or other coverings that might obstruct 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 platf

20、orm must retain its original feet (or the equivalent thickness in spacers) to provide adequate air flow across the bottom. 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 sl

21、oping shelf or in a tilt- ed position, unless the receiver is properly secured. 6. A product on a roll-about cart should be stable in its mounting to the cart. Caution the customer on the hazards of trying to roll a cart with small cast- ers across thresholds or deep pile carpets. 7. Caution custome

22、rs against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous conse- quences to home and family. A.C. Voltmeter 1500 OHM 10 WATT Place this probe on each exposed metal part. Good Earth Ground such as the Water Pipe, Conduit, etc. 0.15uF

23、 PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1-3 SERVICING PRECAUTIONS CAUTION : Before servicing the DVD covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE : if unforeseen circum- stances create conflict between the following servic

24、ing pre- cautions and any of the safety precautions in this publica- tions, always follow the safety precautions. Remembers Safety First: General Servicing Precautions 1. Always unplug the DVD AC power cord from the AC power source before: (1)Removing or reinstalling any component, circuit board, mo

25、dule, or any other assembly. (2)Disconnection or reconnecting any internal electrical plug or other electrical connection. (3)Connecting a test substitute in parallel with an elec- trolytic capacitor. Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors m

26、ay 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 contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or com

27、parable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with whitch instruments covered by this service manual might be equipped. 5. Do not apply AC power to this DVD and/or any of its e

28、lectrical assemblies unless all solid-state device heat sinks are cerrectly installed. 6. Always connect test instrument ground lead to the appropriate ground before connection the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Discon

29、nect 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 resis- tance between each blade of the attachment plug and acces- sible conductive parts (Note 1) should be more than 1M- ohm. Note 1 :

30、 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 called Electrostatically Sensitive (ES) Devices. Ex

31、amples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor compo- nen

32、t or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commer- cially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit un

33、der test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grouned-tip soldering iron to solder or unsolder ES devices. 4. Use only a

34、n anti-static solder removal device. Some solder removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. Do not remove a replaceme

35、nt ES device from its protec tive package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material). 7. Immediately before removing the protective mate

36、rial from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handlin

37、g unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static elec- tricity sufficient to damage an ES device.) 1-4 SPECIFICATIONS GENERAL Power requirementsAC 120 V, 60 Hz Pow

38、er consumption14W Dimensions (Approx.)440 X 80 X 425 mm (17.3 x 3.1 x 16.7 inches) (w x h x d) Weight (Approx.)5.1 kg (11.2 lbs) Operating temperature5C to 35C (41F to 95F) Operating humidity5 % to 90 % SYSTEM Laser Semiconductor laser, wavelength 650 nm Signal systemNTSC Frequency responseDVD (PCM

39、96 kHz): 8 Hz to 44 kHz DVD (PCM 48 kHz): 8 Hz to 22 kHz CD: 8 Hz to 20 kHz Signal-to-noise ratioMore than 100dB (ANALOG OUT connectors only) Harmonic distortionLess than 0.008% Dynamic rangeMore than 100 dB (DVD) More than 95 dB (CD) OUTPUTS VIDEO OUT1 Vp-p 75 , negative sync, RCA jack x 1 S-VIDEO

40、OUT(Y) 1.0 V (p-p), 75 , negative sync, Mini DIN 4-pin x 1 (C) 0.3 V (p-p) 75 COMPONENT VIDEO OUT(Y) 1.0 V (p-p), 75 , negative sync, RCA jack x 1 (Pb)/(Pr) 0.7 V (p-p), 75 , RCA jack x 2 Audio output (digital audio)0.5 V (p-p), 75 , RCA jack x 1 Audio output (analog audio)2.0 Vrms (1 kHz, 0 dB), 60

41、0 , RCA jack (L, R) x 1 FRONT VIEW (DVB352) 2-1 SECTION 2 CABINET & MAIN CHASSIS CONTENTS 1. EXPLODED VIEWS.2-2 1. Cabinet and Main Frame Section.2-2 2. Packing Accessory Section.2-4 2-2 EXPLODED VIEWS 1. Cabinet and Main Frame Section 465 465 250 462 462 300 DIG901 465 261 260 275 463 463 465 467 4

42、63 463 463 A00 A47 A46 A48 A43 A42 A49 283 280 452 452 320 261A 261A A 5 4 3 2 1 BCD 2-3 Cabinet and Main Frame Section Cabinet and Main Frame Section Part List SALLOCA NOLG PART NOADESCRIPTIONSPECIFICATIONREMARKS ASSEMBLY PARTS SECTION A426871R-5097AOPWB(PCB) ASSEMBLY,TOTALDM6000 SH KEY1 A433501RF4

43、030LOBOARD ASSEMBLYDVD DM7912NM HA1UZZ FRONT A466885R-0700AOSUB PWB(PCB) ASSEMBLYDM7912NM HA1UZZ 55(U),53(S),00 A476871R-6857AOPWB(PCB) ASSEMBLY,TOTALDM7000 POWER A486871R-5096AOPWB(PCB) ASSEMBLY,TOTALDM6000 SH TIMER A496871R-5098BOPWB(PCB) ASSEMBLY,TOTALDM6912N HA1UZZ 5 SLIM KEY2 ZEN PARTS SECTION

44、2503111R-D001DOCASE ASSEMBLYDM6912N HA1UZZ TOP 2603140R-0056AOCHASSISDVD DM6000 MAIN 261A5040R-0069DORUBBERFOOT(SILICONE SPONGE DS-08 T= 2754930R-0351AOHOLDERDVD DM6000 BRACKET 2803721R-F300LOPANEL ASSEMBLY,FRONTNORMAL PADM7912NM HA1UZZNSP NSP 2833581R-T067GODOOR ASSEMBLYDVD DM7912NM HA1UZZ TRAY 300

45、6410RAHX02BOPOWER CORDSP-120P/JL001 CHAUS/JULIAN UL/ 3203720R-D068WOPANEL,VIDEODVD DM7912NM HA1UZZ PRESS BACK SCREW 452353-051AOSCREWSPECIAL 463353-051GOSCREW,DRAWING+ 2 D3.0 L8.0 MSWR3/FN TB ROUN 465353-046KOSCREWSPECIAL (3X10 B.K) 467353-046NOSCREW,DRAWINGSPECIAL(3X8 BK.) 2614930R-0350AOHOLDER 2.

46、Packing Accessory Section BATTERY808 PACKING SHEET804 PACKING803 811 812 OWNERS MANUAL PLUG ASSY 1WAY(YELLOW) PLUG ASSY 2WAY 810 CABLE SET ASSY 801 REMOCON900 BOX CARTON802 PACKING803 806 CABLE, DIN 2-4 Packing Accessory Section Part List SALLOCA NOLG PART NOADESCRIPTIONSPECIFICATIONREMARKS 8013835R

47、S0060BOINSTRUCTION ASSEMBLYDVD DM7912NM HA1UZZ 8023890R-H819LOBOXDM7921PM HA1UZZ SWM3-A 1.472 4 8033920R-E063AOPACKING,CASINGDM6000S 0.02 120 EPS 4 615 128 804292-053DOBAGLVP-1NSP 8066850R-DDA82OCABLE,DINMDC-18-MMBS1-0 S-VHS SM TECH 1 808841-0021OBATTERY,MNER03X HI WATT 1.5V .MA/H AAA 8106851R-0033AOCABLE ASSEMBLY1WAY(Y) + 2WAY(R/W) 1.8M + S-V 8116611R1D003AOPLUG ASSEMBLY1WAY RC1-18RRBS1-0 FREE OF CD 8126611R2D003AOPLUG ASSEMBLY2WAY RC2-18RRBS1-0 FREE OF CD_ 9006711R