Rotel-RDV985-cd-sm 维修电路原理图.pdf

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1、T echnicalManual DVD PLAYERRDV-985Table of ContentsSpecification.1Information.217 Parts List.3747 Block Diagrams.1822 PCB Assembly.3436 Schematic Diagram .2333SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU,TOKYO 150-0045, JAPANSerial. NO.Beginning Quality UncompromisedY-356B-0109/WTHE ROTEL CO., LTD.

2、 SpecificationsGeneralReadable Discs:DVD VIDEO, Audio CD, VIDE CD, SUPER VIDEO CDVideo Fomat:PAL or NTSC selectableVideo OutputVIDEO OUT (pin jack):1.0 Vp-p (75 ohms)S-VIDEO OUT (S jack):Y Output:1.0 Vp-p (75 ohms)C Output:286 mVp-p (75 ohms)Horizontal Resolution:500 LinesSignal to Noise Ratio:65 dB

3、Audio OutputANALOG OUT (pin jack):2.0 Vrms (10 kohms)DIGITAL OUT (optical):- 21 to -15 dBm (peak)Audio CharacteristicsFrequency Response:CD: (sampling frequency 44.1 kHz):2 Hz to 20 kHzDVD (sampling frequency 48 kHz):2 Hz to 22 kHzDVD (sampling frequency 96 kHz):2 Hz to 44 kHzDynamic Range:16 bit:Mo

4、re than 100 dB20 bit:More than 108 dB24 bit:More than 108 dBWow and Flutter:Unmeasurable (less than Total Harmonics Distortion:Less than 0.002%0.002%)PhysicalPower Requirements:USA Version:AC 120V, 60 HzEuropean Version:AC 230V, 50 HzPower Consumption:23 W (POWER ON), 2 W (STANBY mode)Weight:4.7 kg

5、(10.4 lbs)Dimensions (W x H x D):445 x 112 x 338 mm171/2 x 47/16 x 135/16 inchRadioFans.CN 收音机爱 好者资料库AppearanceRadioFans.CN 收音机爱 好者资料库2(1) Auto adjustment method(2) Confirmation of DVD RF level(3) Confirmation of CD jitter level and RF level If microprocessor (IC401, IC402, IC714, IC716) or servo bo

6、ard (LEA10047) is replaced, initialize the DVD player in the following matter: ref. separate sheet. Adjustment and confirmation matter1.The oscilloscope is connected between 1(RFOP) of CN104 and 2(GND).2.Reproduction of the test disc ( VT-502) made by JVC.3.It is confirmed that RF LEVEL is 350mVp-p

7、150mVp-p.4.When there is disorder in the waveform road cuts etc, test disk is exchanged and measured.1. The CD jitter meter is connected between 11(GND) of CN104 and 12(FLTOUT). The RF level is observed at the same time. 2.The first test disk(CTS-1000) made of JVC is reproduced. 3.It is confirmed th

8、at RF LEVEL is 360 100mVp-p.?5. When there is disorder in the waveform road cuts etc, test disk is exchanged and measured.FRONT SIDE12 1RFOPGNDGNDFLTOUT121112CN104Servo control P.C.BLEA20001Main AdjustmentDVD SERVO CONTROL PWB+-3RDV-985 is adjusted from issue machine because of the FL display on the

9、 way. Please go in the adjustment method before changes according to the following procedures. Attention !MeasurementCN104 pin1GND:CN104 pin2Adjustment point Refer to Fig.2ModeReproduction partDiscMeasurement machine Oscilloscope VT-502DVD Mechanism AssyStandStand200mmRDV-985Fig.1CN101 of DVD Servo

10、Control PWBCN11 of Connection PWBExtension CordconnectionsRefer to Fig.1Extension cord No.QUQ110-3740AMGeneral tool : Hex-head wrench(2mm)(4)Flap adjustment of the Pick-up guide shaft4 Confirmation after adjustment.Confirm to reproduce video CD and CD afterthe DVD test disc is adjusted and to find a

11、bnormality. (5) About keeping the disc As for the DVD test disc, plane accuracy is demanded.Please note the keeping place on the disc. ?1. Please do not put the disc directly on the work desk etc. after uses . ?2.To keep the planarity of the disc, politely handle ,and please put in a special case an

12、d keep? the disc vertically after uses . ? Please keep keeping the disc in a cool place where direct sunshine and the air-conditioning ? wind do not drive. ?3.When the disc curves,an accurate adjustment cannot be done. ? Please exchange for a new test disc and adjust optics. ?4?Other discs might not

13、 be able to be reproduced when adjusting on a curved disc. AABFig.2 Point of adjustment ? * Please execute the static electricity protection measures before starting the adjustment.? * When the following parts are exchanged,optical adjustment Adjust the flap of the disc motor is necessary.?1.The dis

14、c motor was exchanged.?2.The laser pick up was exchanged.?3.The traverse motor unit was exchanged. ? Note?Additionally, please adjust the flap of the disc motor when the picture quality deterioration is ?seen .The basic adjustment though, is unnecessary for part exchange in the traverse. An optical

15、adjustment in the laser pick up cannot be done.?Please adjust the flap of the disc motor after exchanging the laser pick up. * When the traverse unit is exchanged, the adjustment is basically unnecessary. 5Check points for each error(1) Spindle start error*Defective spindle motor Are there 10ohms re

16、sistance between each pin of CN101 2931? (The power supply is turned off and measured.)*Hall element: Is sine wave output between CN101 23 and 24, between 25 and 26, and between 27 and 28 during rotation? In either case, replace the mechanical unit.?*Defective spindle driver (IC251) Is a driving wav

17、e output from CN101 2931 ? Is IC251 9 at H level (START)?Servo IC - Is control signal sent to the motor driver ? IC201 95 : Duty is 50% during stop, but varies during rotation (greatly varies at start).- If not sent, pattern or servo IC (IC201) is defective.R259 : approx 2.5V during stop, but varies

18、 during rotation (greatly varies at start).- of not sent, pattern or servo IC (IC201) is defective.?Is FG input to servo IC ?Observe FG wave from IC201 89. - If not output, pattern, IC251 or IC201 is defective.Duringrotation(2) Disc Detection, Distinction error (no disc, no REFNV) * Laser is defecti

19、ve. * Front End Processor is defective (IC101). * APC circuit is defective. - Q101. * Pattern is defective. - Lines for CN101 15 and 17.? Lines for between IC201 2 and IC101 2(LDONA),? between IC201 3 and IC101 1 (LDONB). * Servo IC is defective (IC201).? * Is signal sent to IC201(servo)71 AS2 ? * I

20、C101 - For signal from IC101 to IC301, is signal output from IC101 88 (RFAS1) and ? IC101 69 REENV ?650msecApprox.500mVGND2.5V(3) Traverse movement NG* For automatic adjustment, traverse movement occurs only when the position is changed to retry judging the disc type after the 1st judgment resulted

21、in an error. Therefore, traverse movement rarely occurs because, in most cases, disc judgment at the current position (1st time judgment) is executed successfully. (Of course, NG rarely occurs in this step.)Note: 1st time judgment of disc type resulted in NG. - The re-judgment of disc type may not b

22、e successful. Therefore, after removing the cause of traverse movement, re-execute automatic adjustment and confirm that no problem exists.* Check point a)?During stop?Whether 50% duty pulse is output to R273?Whether between R274 and C271 is at approx. 2.5VDC?Offset voltage between CN101 34 and 35 (

23、scores mV if exists)? b)?When tray is opened or closed?Check by oscilloscope whether a rectangular wave signal is output from CN101 34 or 35.? If checking a) or b) resulted in NG, IC201 maybe defective.(4) Focus ON NG* Is FE output ? - Pattern, IC101* Is FCDRV signal sent ? (R286) - Pattern, IC301*

24、Is driving voltage sent ?CN101 20, 21 - If NG, pattern, driver, mechanical unit (with the power turned off, measure the? resistance between CN101 20 and 21).?* Does CN101 7(SRF1) become H and is the focus drawing in done? - Mechanical unit (laser power too low), IC101(defective gain)? - Moreover, It

25、 is thought that abnormality is found in the disk.?* Mechanical unit is defective.(5) Tracking ON NG* When the tracking loop cannot be drawn in, IC201 39 (/TRON) does not become L.* Mechanical unit is defective.?Because the undermentioned adjustment value is abnormal, it is not possible to draw in n

26、ormally.* Periphery of driver (IC271)?Constant or IC it self is defective.?(When passing without becoming abnormal while adjusting the following.)* Servo IC (IC201)?When improperly adjusted due to defective IC.?Focus position rough adjustment?Phase difference cancellation rough adjustment?Tracking b

27、alance adjustment7(6) Spindle CLV NG* When the spindle cannot be shifted to CLV Servo, does not become H between IC301 69 and IC20137.* IC201 Is signal output from CN103 1 (RFOP)?* IC201 Is signal output from CN103 11 (DSLIP)?* IC201 Is signal output from CN103 6 to 9 (binary-coded clock and data)?*

28、 IC201 Is 39 (/TRON) at L level ?* IC301 74 to 76 - Is signal output to IC201 24, 25, 28 (In case of only CD).? (Serial communication of rotation information)* Spindle motor driver is defective. Even when one of the three phases is defective, item (1) may be passed. - Check the second item in (1) ab

29、ove.* C260 to C263 Defective soldering If noise eliminating capacitors are not properly soldered, noise may ride on the waveform.?* Besides, the undermentioned cause is thought though specific of the cause is difficult because various factors are thought.?Mechanism is defective.(jitter)?IC101, IC201

30、.* Besides, the undermentioned cause is thought though specific of the cause is difficult because various factors are thought.?Mechanism is defective. (jitter)?IC201, IC301, IC401.?The disc is dirty or the wound has adhered.(7) Address read NG(8) Between layers jump NG (double-layer disc only)* When

31、 the focus flight is generated when jumps between layers. Because all adjustments for L1 layer must be successful, this error may rarely be due to a circuit defect.?* Crosstalk might occur from tracking to focus system. (See (11) ) - Replace the mechanical unit.* Driver surroundings.* Defect of cons

32、tant and IC.* For double-layer discs, after checking CLV on layer L1, jumps to layer L0 after mode changes to FG. Then tracking is turned off, and adjustments are executed from the focus position coarse adjustment in order.* When the jump between layers is done on the single-layer disk, the disk dis

33、tinction error is thought.?- The laser power is low (RF level is confirmed by CN102 1 (RFOP).?- AS1, AS2, REFNV Is the signal sent to between IC101 and IC201 ?8Long-distance seekFeedTrackingHold (DC) during feedAcceleration pulse at start;deceleration pulse at stop(each one)(In the direction of sear

34、ch,opposite to this figure)Kick pulse (fine seek) isinserted after long-distance seek.(Not one)Kick pulseApprox.2.5V(9) Neither picture nor sound is output* Cannot searcha) Can the feed system be driven?Check the waveform of TRSDRV signal (R273). - Waveform between R274 and C271.?Search results in a

35、 change of duty?(three values with 2.5V at the center)?(The figure is exaggerated.)?Check the waveform of CN101 1 and 2. - After the driver (IC271)b) Is kick available?Check the TRDRV signal waveform from R289.?Check the waveform of CN101 22 and 23 - After the driver (IC271)?Although differs in ampl

36、itude and DC offset, the waveform is similar to that of R289For short-distance search, the waveformbecomes roundish, not trapezoidal, andvoltage is low.9(10) Picture is distorted or abnormal sound occurs at intervals of several seconds.Does JITOUTchange periodically?(2V or more in peakvalue, exceptd

37、uring kick)NOYESSome system otherthan servo may bedefective.Feed system is defective (drive gain is defective: too large). Check the waveform according to a) in (9). Play back a simple disc with no angle change. OK when the following waveform appears at intervals of several seconds.510Sec.11.2VIf th

38、is voltage is toohigh (2V or more, forexample), feed motormay be defective, orthe mechanical unithas seized.(11) Others (unusual events experienced to date)(13) Others* Problem occurs with double-layer discs although no problem occurs with single-layer DVD.?(Error occurs, or search becomes unstable

39、and takes longer.) Crosstalk might occur from tracking to focus system.?- When FE was observed during search (skip, etc.), it was found that a wave resembling TE? with an amplitude of 200mVp-p was riding on FE.?- Mechanical unit was replaced.* Error frequently occurred in the outer part of discs alt

40、hough no error occurred in the inner part.?- Mechanical unit was replaced because tilt seemed to be defective.V-CD : Frequent occurrence of error in inside and outer.(Even the disk without the wound : when generated.)Waveform observation?- Is the oscillation frequency of about 700900Hz output? (Borr

41、ow a pertinent disk for the complaint for the combination with the disk.)?- Exchanges mechanism for the mechanism resonance.(12) CD During normal playback operationa) Is TOC reading normal? Displays total time for CD-DA. Shifts to double-speed mode for V-CD.?b)Playback possible?Please refer to Servo

42、 Volume flow.*-:- is displayed during FL serch. According to *Cannot serch for DVD(9), check the feed and tracking systems.*No sound is output although the time is displayed.(CA-DA)*DAC, etc, other than servo.*The passage of time is not stable, or picture is abnormal.(V-CD)?*The wound of the disc an

43、d dirt are confirmed.NONOYES10Precautions for Service Handling of Traverse Unit and Laser Pickup? 1. Do not touch any peripheral element of the pickup or the actuator.?2. The traverse unit and the pickup are precision devices and therefore must not be subjected to ? strong shock.?3. Do not use a tes

44、ter to examine the laser diode. (The diode can easily be destroyed by the ? internal power supply of the tester.)?4. To replace the traverse unit, pull out the metal short pin for protection from charging.?5. When replacing the pickup, after mounting a new pickup, remove the solder on the short land

45、 ? which is provided at the center of the flexible wire to open the circuit.?6. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the ? characteristics of the optical block.? Do not change the setting of these half-fixed resistors for laser power adjustment.?

46、Destruction of Traverse Unit and Laser Pickup by Static Electricity Laser diodes are easily destroyed by static electricity charged on clothing?or the human body. Before repairing peripheral elements of the traverse?unit or pickup, be sure to take the following electrostatic protection:?1. Wear an a

47、ntistatic wrist wrap.?2. With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the sheet or the plate.?3. After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.?4. Short-c

48、ircuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup.? After completing the repair, remove the solder ? to open the circuit.?Short-circuit11Is the ACwave detected onthe anode side ofD953?Does theoscillation wavecome out toIC9013?P.STAND-BYi

49、ndicating lamplights up?Connect to outlet.Press POWER switch.STANDBYindicating lampgoes out?ACheck S867(power switch)and the lineto IC714.F901fuse is blownDoes FLlight up?Correctvoltage applied at eachleadof FL?Correct voltageapplied to IC831(FL driver)?ReplaceF901.Voltage ofIC9531 atapprox.5.6V?Osc

50、illatingwave output fromIC83120?Voltageof IC83113(P.ON RESET)at +5V?CheckIC831,R843and C833.BIs connectionbetween IC83113and IC71476 OK?Repair the wiring.Voltageof CN83119at +5V?Replace IC831.Voltageof IC9533at 5 V?ReplaceIC953.ContinuityOK between IC9533and IC71416, 62 and 99?Is IC953hot?toMicro-co