JVC-THA10-ddcs-sm维修电路原理图.pdf
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1、SERVICE MANUAL No.20872 Sep. 2000 COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD. Printed in Japan 200009(S) No.20872 DVD DIGITAL THEATER SYSTEM TH-A10R/TH-A10TH-A10R/TH-A10 TH-A10R TH-A10 XV-THA10R (DVD player)/XV-TH-A10 SP-THA10 (Speaker section) SP-PWA10 (Powered subwoofer) SP-XCA10 (Center speaker)
2、 SP-XSA10 (Satellite speaker) x 4 Contents Safety Precautions Important for laser products Preventing static electricity Disassembly method Adjustment method Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs 1-2 1-3 1-4 1-5 1
3、-21 1-24 1-25 1-25 1-26 Area Suffix TH-A10R B EN EE U.K. Northern Europe Russia Area Suffix TH-A10 EContinental Europe VICTOR COMPANY OF JAPAN, LIMITED OPTICAL DISC BUSINESS DIV. PERSONAL Region cord. 3) Press Enter button. And EEPROM initialize start. 4) When indicate 96kHz EEPROM on the display ,
4、initialize finished. Note : During the EEPROM initialization the keys may not be operated. Press the POWER key to initiate the STAND-BY mode and the test mode will then be cancelled. Adjustment and confirmation matter 1.The oscilloscope is connected between 1(RFOP) of CN104 and 2(GND). 2.Reproductio
5、n of the test disc (VT-501) 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 sam
6、e 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 P12 and GND P1 and GND Main Adjustment DVD SERVO CONTROL PWB TH-A10R/TH-A10 1-2
7、2 MeasurementAdjustment point Refer to Fig.2 Mode Reproduction part Disc Measurement machine No need Flap adjustment of the Pick-up guide shaft adjusts Tangential adjustment machine screw A and Tilt adjustment machine screw B from the DVD Mechanism Assy bottom. 1. The part at the center on the DVD t
8、est disc is reproduced. 2.The flap adjustment screws is turned alternately and adjusted like clearly seeing the waveform of CN1041 to the way. Note 1.The tangential adjustment is done finish and, then, tilt is adjusted. 2.The repeat the adjustment 2-3 times,for best result. 3.The final adjustment sh
9、ould be tilt adjustment. VT-501 DVD Mechanism Assy Stand Stand 200mm DVD player 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 (1.27 mm) (4) Flap adjustment of the Pick-up guide sha
10、ft 1) Make sure that there is no disc on the tray. 2) Press both the PLAY and OPEN/CLOSE keys of the main unit to activate the primary power and ( ; Version3, ; Region cord) will be displayed on the FL indicator. Note: If the FL indicator display stops and remains at TEST 0, unplug the power cord fr
11、om the outlet and after waiting at least 1 second, plug it in again. After the tray open/close procedure has completed, unplug it again and then perform the initialization procedure again. 3) Press the OPEN/CLOSE key of the main unit to draw the tray out. *Place the test disk (VT-501) on the tray an
12、d then press the OPEN/CLOSE key. (Note: Pushing the tray to close it is not possible.) 4) Press the PLAY key of the main unit. 5) The JIT 0000 is displayed on the FL indicator. Set the FL indicator figure value to its minimum by adjusting the pickup guide shaft flap. * The test mode is cancelled whe
13、n the power is turned off. TH-A10R/TH-A10 1-23 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
14、. 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
15、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 mea
16、sures 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 t
17、he 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 uni
18、t is exchanged, the adjustment is basically unnecessary. TH-A10R/TH-A10 1-24 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 su
19、bjected 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 p
20、ickup, 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 r
21、esistors 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 e
22、lectrostatic 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 flexib
23、le 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 circuit. Short-circuit TH-A10R/TH-A10 1-25 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26
24、 25 24 23 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 SDOS OCKS MIS BCLK LRCK SDTI1 SDTI2 SDTI3 SDTO DAUX DFS VREFL RIN+ RIN- LIN+ LIN- ROUT1 LOUT1 ROUT2 LOUT2 ROUT3 LOUT3 DEM1 DEM0 MCKO DVDD DVSS PD XTS ICKS1 ICKS0 CAD1 CAD0 CDTO CDTI CCLK CS PIS XTO XTI AVSS AVDD VREFH VCOM L
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