Rotel-RDV-985-Service-Manual电路原理图.pdf

T echnical Manual DVD PLAYER RDV-985 Table of Contents Specification.1 Information.217 Parts List.3747 Block Diagrams.1822 PCB Assembly.3436 Schematic Diagram .2333 SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU, TOKYO 150-0045, JAPAN Serial. NO. Beginning Quality Uncompromised Y-356A-0109/W THE ROTEL CO., LTD. Specifications General Readable Discs:DVD VIDEO, Audio CD, VIDE CD, SUPER VIDEO CD Video Fomat:PAL or NTSC selectable Video Output VIDEO 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 Lines Signal to Noise Ratio:65 dB Audio Output ANALOG OUT (pin jack):2.0 Vrms (10 kohms) DIGITAL OUT (optical):- 21 to -15 dBm (peak) Audio Characteristics Frequency Response: CD: (sampling frequency 44.1 kHz):2 Hz to 20 kHz DVD (sampling frequency 48 kHz):2 Hz to 22 kHz DVD (sampling frequency 96 kHz):2 Hz to 44 kHz Dynamic Range: 16 bit:More than 100 dB 20 bit:More than 108 dB 24 bit:More than 108 dB Wow and Flutter:Unmeasurable (less than Total Harmonics Distortion:Less than 0.002% 0.002%) Physical Power Requirements: USA Version:AC 120V, 60 Hz European Version:AC 230V, 50 Hz Power Consumption:23 W (POWER ON), 2 W (STANBY mode) Weight:4.7 kg (10.4 lbs) Dimensions (W x H x D):445 x 112 x 338 mm 171/2 x 47/16 x 135/16 inch RadioFans.CN 收音机爱 好者资料库 Appearance RadioFans.CN 收音机爱 好者资料库 (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 board (LEA10047) is replaced, initialize ? the DVD player in the following matter: ref. separate sheet. Adjustment and confirmation matter 1.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 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 that RF LEVEL is 360 100mVp-p.? ? 5. When there is disorder in the waveform road cuts etc, test disk is exchanged and measured. FRONT SIDE 12 1 RFOPGNDGNDFLTOUT 121112 CN104 Main Adjustment DVD SERVO CONTROL PWB + + RDV-985 is adjusted from issue machine because of the FL display on the way. Please go in the adjustment method before changes according to the following procedures. Attention ! Measurement CN104 pin1 GND:CN104 pin2 Adjustment point Refer to Fig.2 Mode Reproduction part Disc Measurement machine Oscilloscope VT-502 DVD Mechanism Assy Stand Stand 200mm RDV-985 Fig.1 CN101 of DVD Servo Control PWB CN11 of Connection PWB Extension Cord connections Refer to Fig.1 Extension cord No. QUQ110-3740AM General tool : Hex-head wrench(2mm) (4)Flap adjustment of the Pick-up guide shaft Confirmation after adjustment. Confirm to reproduce video CD and CD after the DVD test disc is adjusted and to find abnormality. (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 and 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 be able to be reproduced when adjusting on a curved disc. A AB Fig.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 disc 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 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. Check points for each error (1) Spindle start error *Defective spindle motor Are there 10ohms resistance 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 wave 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 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. During rotation (2) Disc Detection, Distinction error (no disc, no REFNV) * Laser is defective. * 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 ? * IC101 - For signal from IC101 to IC301, is signal output from IC101 88 (RFAS1) and ? IC101 69 REENV ? 50msec Approx. 500mV GND 2.5V (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 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 be 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 (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 * 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 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 normally. * 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 balance adjustment (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)? * 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) above. * 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. * 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 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 constant 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 distinction 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 ? Long-distance seek Feed Tracking Hold (DC) during feed Acceleration pulse at start; deceleration pulse at stop (each one) (In the direction of search, opposite to this figure) Kick pulse (fine seek) is inserted after long- distance seek. (Not one) Kick pulse Approx. 2.5V (9) Neither picture nor sound is output * Cannot search a) Can the feed system be driven? ?Check the waveform of TRSDRV signal (R273). - Waveform between R274 and C271. ?Search results in a 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 amplitude and DC offset, the waveform is similar to that of R289 For short-distance search, the waveform becomes roundish, not trapezoidal, and voltage is low. (10) Picture is distorted or abnormal sound occurs at intervals of several seconds. Does JITOUT change periodically? (2V or more in peak value, except during kick) NO YES Some system other than servo may be defective. 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. 11.2V If this voltage is too high (2V or more, for example), feed motor may be defective, or the mechanical unit has 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 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 although 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? ? (Borrow a pertinent disk for the complaint for the combination with the disk.)? ?- Exchanges mechanism for the mechanism resonance. (12) CD During normal playback operation a) 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 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 and dirt are confirmed. NO NO YES Precautions 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 tester 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 ? 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. ? ?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 antistatic 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-circuit 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