NAD-C545BEE-cd-sm 维修电路原理图.pdf
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1、NADC 545BEECOMPACTDISC PLAYERC 545BEECOMPACTDISC PLAYERSERVICE MANUALRadioFans.CN 收音机爱 好者资料库- 2 -SAFETY INFORMATIONCAUTIONTHIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:-(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND(2) THIS DEVICE MU
2、ST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.The lightning flash with arrowhead, within an equilateral tri-angle is intended to alert the user of the presence ofuninsulated dangerous voltage within the productsenclosure; that may be of sufficient mag
3、nitude to consti-tute a risk of electric shock to persons.The exclamation point within an equilateral triangle is intend-ed to alert the user of the presence of important operatingand maintenance (servicing) instructions in the literatureaccompanying the appliance.CLASS 1LASER PRODUCTRadioFans.CN 收音
4、机爱 好者资料库- 3 -SERVICE SAFETY PRECAUTIONS1. Replacing the fusesCAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE.Reference NoPart NumberDescriptionFC201 *C 5120-0050+0FUSE T1.6A/250V 5X20FC201 *AH 5120-0052+0FUSE T1.6A 250V 5X20FC202, FC204, FC205 *C 5120-0
5、018+0FUSE T1A 250V 5X20FC202, FC204, FC205 *AH 5120-0020+0FU T1A 250V UL/CSA 5X20FC203 *C 5120-0035+0FU T100MA 250VFC203 *AH 5120-0036+0FUSE 250V 100MA T 5X20NOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY.2. Safety check out(Only U.S.A. model)Before returning the product to the customer, ma
6、ke leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit.Parts marked with the symbol are critical with regard to the risk of fire and electric shock.Replace only with parts recommended by the manufacturer.CONTENTSDESCRIPTION PAGE
7、SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5DISASSEMBLY INSTRUCTIONS . . . . . .
8、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8RF PATTERN TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10、 . . . . . . . .10-12PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-16SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-23IC BLOCK DIAGR
11、AM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24-31TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . .
12、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33-44MECHANISM EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45MECHANISM EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13、46EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48PACKING DIAGRAM . . . . . . . . . . .
14、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49- 4 -SPECIFICATIONSGENERAL PARAMETERS Output level - Analog 2.2 0.1 V Optical -22.5 3.5 dBm Coaxial 650 150 mV Frequency response 0.3 dB (ref. 0 dB 20 Hz-1 kHz) 0.5 dB (ref. 0 dB 5 kHz-20 kHz) Total harm
15、onic distortion 90 dB De-emphasis -3.73 to -5.33 dB (ref. 0dB 5 kHz) -8.04 to -10.04 dB (ref. 0 dB 16 kHz) Linearity 0.01 dB (ref. 1 kHz at -3 dB) 0.02 dB (ref. 1 kHz at -6 dB) 0.02 dB (ref. 1 kHz at -10 dB) 0.05 dB (ref. 1 kHz at -20 dB) 0.15 dB (ref. 1 kHz at -60 dB)DIMENSION AND WEIGHT Unit Dimen
16、sions (W x H x D) 435 x 285 x 70 mm (Net) 435 x 293 x 86 mm (Gross)* Net weight 4.9 kg Shipping weight 6.3 kg* - Gross dimensions include feet, extended buttons and rear panel terminals.- 5 -1. UPGRADE PORT 2. LINE OUT 3. DIGITAL OUT (COAXIAL, OPTICAL)4. +12V TRIGGER INPUT5. IR INPUT6. AC MAINS INPU
17、T1. STANDBY 2. STANDBY LED 3. DISC TRAY4. OPEN/CLOSE5. PLAY/PAUSE6. STOP7. RANDOM8. REPEAT9. DISPLAY10. SKIP/SCAN11. VFD12. REMOTE SENSORREAR PANEL / FRONT PANELREAR PANELFRONT PANEL123456123456789101211- 6 -76654312DISASSEMBLY INSTRUCTIONS1. Remove machine screws M 4.0 x 6.0 ( 1 to 4 ) from the sid
18、e panels. Remove tapping screw 3.0 x 8.5 ( 5 )from the back panel. Refer to Figure No.1. Figure No.12. Pull both sides of the TOP COVER slightly outwards 6 and tilt approx. 35 and then remove in the direction as indicated by the arrow 7 . Refer to Figure No.2. Figure No.2.- 7 -BLOCK DIAGRAM? ? ?- 8
19、-WIRING DIAGRAMCD MECHANISMSWITCH BoardKEY BoardSERVO BoardMAIN BoardTRANSFORMERAC IN7013-0550+0part of the fascia assembly7013-0510+07013-0530+0part of the fascia assembly NSPNSP7013-0540+07012-9020+07013-0520+07013-0570+07013-0560+0 7013-1280+0 7012-9301+0 CORD-AC GS 250V 2.5A - C VERSION7012-9331
20、+0 CORD-AC UL 125V 7A - AH VERSION- 9 -RF PATTERN TESTINGNAD - C 545BEE PCB TESTING POINTS DIAGRAMTESTING PROCEDURE(1) Load the test disc (Sony Test CD YEDS-7) and set the unit into PLAY mode.(2) Connect the scope to C7 (Pin 81 of IC1) and DGND (C32). Scope setting: Coupling : AC. Vertical sensitivi
21、ty : 0.2 V/ div. Horizontal time base : 0.5 S/div.(3) Observe the waveform is 1.5V p-p +/-5% and the eye pattern is at its best shape (see FIG. 1).FIG. 1 (a) FIG. 1 (b) Poor eye pattern FIG. 1 (C) Good eye pattern3T4T5T 11TTest Point- 10 -IMPORTANT NOTESINSTRUCTION FOR HANDLING OPTICAL SYSTEM BLOCK
22、PICK-UPElectrostatic breakdown of the laser diode in the optical system block may occur due to a potential difference caused by electrostatic charge accumulated on clothing, human body, etc. A ground must be provided as follows to prevent any electrostatic charge during unpacking or repair work.1. G
23、round for Human BodyBe sure to wear a ground band (1M ohm) that is properly to remove any static electricity that may be charged on the body.2. Ground for Work BenchBe sure to place a conductive sheet (1M ohm) or copper plate with proper grounding on the work bench or other sur-face on which the pic
24、k-up is to be placed.3. Because the static electricity charge on the clothing does not discharge through the body grounding band, do not let clothing to get in contact with the pick-up unit. PRECAUTIONS FOR CHECKING BEAM EMISSIONThe laser beam of this unit is focused on the reflecting surface of the
25、 objective lens in the optical system block. Therefore, keep your eyes at least 12 inches (30 cm) away from the objective lens when the laser diode is ON.(Operation Check Method for Laser Diode and Focus Search Function.)When the POWER switch is turned ON after the chucking plate is removed, observe
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