NAD-T531-cd-sm2 电路图 维修手册.pdf

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1、CONTENTS SECTION 1 . . . .SUMMARY SECTION 2 . . . .CABINET & MAIN CHASSIS SECTION 3 . . . .ELECTRICAL SECTION 4 . . . .MECHANISM SECTION 5 . . . .REPLACEMENT PARTS LIST RadioFans.CN 收音机爱 好者资料库 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-3 SERVICING PRECAUTION

2、S. 1-4 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SPECIFICATIONS. 1-5 RadioFans.CN 收音机爱 好者资料库 1-3 Prior to shipment from the factory, the products are strictly inspected to conform with the recognized product safety and electrical codes of the cou

3、ntries in which they are to be sold. However, in order to maintain such com- pliance, it is equally important to implement the following precautions when a set is being serviced. Precautions during Servicing 1. Locations requiring special caution are denoted by labels and inscriptions on the cabinet

4、, chassis and certain parts of the product. When performing service, be sure to read and comply with these and other cautionary notices appearing in the operation and service manuals. 2. Parts identified by the symbol and shaded ( Y) parts are critical for safety. Replace only with specified part nu

5、mbers. Note : Parts in this category also include those specified to comply with X-ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spurious radiation emission. 3. Use Specified internal wiring. Note especially: 1) Doub

6、le insulated wires 2) High voltage leads 4. Use specified insulating materials for hazardous live parts. Note especially: 1) Insulation Tape 2) PVC tubing 3) Spacers 4) Insulation sheets for transistor 5. Observe that wires do not contact heat producing parts (heatsinks, oxide metal film resistors,

7、fusible resistors, etc.) 6. Check that replaced wires do not contact sharp edged or pointed parts. 7. 1) When a power cord has been replaced, check that A mark is made on the cord, under strain, near the aperture, and the flexible cord is subjected 100 times to a pull of 40N for a duration of 1 seco

8、nd each. 2) During the test, the cord shall not be displaced by more than 2mm 8. Also check areas surrounding repaired locations. IMPORTANT SAFETY PRECAUTIONS Fig. 1 Power cord RadioFans.CN 收音机爱 好者资料库 1-4 Fig. 3 SAFETY CHECK AFTER SERVICING Examine the area surrounding the repaired location for dama

9、ge or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. Insulation resistance test confirm the specified insulation resistance or

10、greater between power cord plug prongs and externally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) See table below. Dielectric strength test Confirm specified dielectric strength or greater between powe

11、r cord prongs and exposed accessible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) See table below. Clearance distance When replacing primary circuit components, confirm specified clearance distance (d), (d) bet

12、ween sol- dered terminals, and between terminals and sur- rounding metallic parts. See table below. Table 1 : Ratings for selected areas * Class II model only. Note. This table is unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality. Leaka

13、ge Current test Confirm specified or lower leakage current between B(earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, micro- phone jacks, earphone jacks, etc.) Measuring Method: (Power ON) Inse

14、rt load Z between B(earth ground, power cord plug prongs) and exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See figure and following table. Table 2:Leakage current ratings for selected areas. Note. This table is for IEC member only. Be sure to confirm the

15、precise values for your particular country and Note. locality. Chassis d a Primary circuit terminals Exposed accessible part Z Load AC Voltmeter Earth Ground, Power cord plug prongs B Fig. 2 AC Line Voltage AC Line Voltage 100 to 130 V 200 to 240 V *100 to 130 V *200 to 240 V Australia Europe Austra

16、lia Europe Other terminals Antenna earth terminals i E 0.7m A peak i E 2m A DC i E 0.7m A peak i E 2m A DC F 10 M/500 V DC4kV 1 minute F 6mm(d) F 8mm(d) (a Power cord) RegionLoad ZLeakage Current(i) Earth Ground (B) to : Region Insulation Resistance Dielectric Strength Clearance Distance(d),(d) 2k 5

17、0k 1-5 SPECIFICATIONS DVD VIDEO PLAYER Power supplyAC 110240V, 50/60Hz(T531B, T531C) AC 120V, 60Hz(T531AH) Power consumtion16W Mass3.0kg(6.6lbs) External dimensions435 x 88 x 247 mm (W x H x D) Signal systemPAL 625/50, NTSC 525/60 LaserSemiconductor laser, wavelength 650nm Frequency range (digital a

18、udio)4Hz to 20kHz Signal-to-noise ratio (digital audio)More than 100dB (EIAJ) Audio dynamic range (digital audio)More than 95dB (EIAJ) Harmonic distortion(digital audio)0.008% Wow and flutterBelow measurable level (less than +0.001%(W.PEAK) (EIAJ) OperationsTemperature : 5C(41F) to 35C(95F), Operati

19、on status : Horizontal OUTPUTS Video outputs1.0V(p-p), 75, negative sync., RCA jack x 1/ SCART(TO TV) (T531C ONLY) S video outputs(Y)1.0V(p-p), 75, negative sync.,Mini DIN 4-pin x 1 (C)0.286V(p-p), 75 Audio output(digital audio)0.5V(p-p), 75, RCA jack X 1 Audio output(optical audio)Optical connector

20、 x 1 Audio output(analog audio)2.0Vrms (1kHz, 0dB), 330, RCA jack (L, R) x 1/ SCART(TO TV) (T531C ONLY) *Designs and specifications are subject to change without notice. *Weight and dimensions shown are approximate. 2-1 SECTION 2 CABINET & MAIN CHASSIS CONTENTS 1. DISASSEMBLY.2-2 CABINET DISASSEMBLY

21、 .2-2 CIRCUIT BOARD DISASSEMBLY .2-3 2. EXPLODED VIEWS.2-4 1. Cabinet and Main Frame Section.2-4 2. Packing Accessory Section.2-6 2-2 DISASSEMBLY CAUTION BEFORE STARTING SERVICING Electronic parts are susceptible to static electricity and may easily and damaged, so do not forget to take a proper gro

22、unding treatment as required. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screw driver in servicing. Several kinds of screws are used and some of them need special cautions. That is, take care of the tapping screws securing molded p

23、arts and fine pitch screws used to secure metal parts. If they are used improperly, the screw holes will be easily damaged and the parts can not be fixed. Top Case (A) (A) (A) (A) (A) (A) (A) Tray Door Disc Tray Front Panel Stopper Stopper (B) CABINET DISASSEMBLY 1. Top Case 1. Release 7 screws (A).

24、 (See Fig. 2-1) 2. Lift the top case with holding the back of it, and remove it in the direction of the arrow Fig. 2-1 Fig. 2-2 Fig. 2-3 3. Front Panel 1. Eject the disc tray. (See Fig. 2-2) 2. Remove the tray door. (See Fig. 2-2) 3. Release 2 screws (B). 4. Pull the front panel toward you while pre

25、ssing 7 stoppers to disengage, and remove the front panel. (See Fig. 2-3) 2.Tray Door 1.Eject the disc tray. 2.Lift up the tray door in the direction of the arrow. 2-3 Main Circuit Board (C) (C) (C) (C) (C) (C) (C) (C) (C) (C) (C) (C) Power Code Interface Board (D) (D) Scart Key Circuit Board (E) (E

26、) (E)(E) (5, 6, 7 TOOL ONLY) Fig. 2-4 Fig. 2-5 1. Disassembling of Main Circuit Board and Interface Board 1. Remove the top case.(See Fig. 2-1) 2. Remove 12 screw (C). 3. Remove the deck from Main Circuit Board. 4. Remove Main Circuit Board from Interface Board. 5. Remove 2 screw (D). 6. Remove Inte

27、rface Board from the chassis. CIRCUIT BOARD DISASSEMBLY Note: Before removing the main circuit board, be sure to shortcircuit the laserdiode output land. After replacing the main circuit board, open the land after inserting the flexible connector. (Refer to Mechanism Disassembly) 2. Digitron and Key

28、 Circuit Board 1. Remove the front panel.(See Fig. 2-3) 2. Release 4 screws (E), and remove the digitron circuit board. 2-4 EXPLODED VIEWS 1. Cabinet and Main Frame Section 280 465 467 465 465 463 A46 463 463 275 332 PBP00 PBT00 283 260 467 300 467 A48 A43 250 462 462 463 463 452 452 285 OPTIONAL PA

29、RT Scart A 5 4 3 2 1 BCD 2-5 2.Packing Accessory Section BATTERY808 PACKING SHEET804 PACKING OPTIONAL PARTS 803 806 OWNERS MANUAL RF CABLE 810 CABLE SET ASSY 801 REMOCON900 BOX CARTON802 PACKING803 811 812 PLUG ASSY 1WAY PLUG ASSY 2WAY 3-1 SECTION 3 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUI

30、DE.3-2 1. Power(SMPS) Circuit.3-2 2. -com Circuit.3-3 3. MPEG Circuit.3-6 4. Front Circuit(Digitron & Key) .3-7 5. RF/Servo Circuit .3-8 BLOCK DIAGRAMS.3-12 1. Overall Block Diagram.3-12 2. Power (SMPS) Block Diagram.3-14 3. RF/CD DSP/DVD DSP/DVD servo Block Diagram .3-18 4. Audio Block Diagram.3-19

31、 5. MPEG Block Diagram.3-17 6. -COM Block Diagram.3-18 CIRCUIT DIAGRAMS.3-19 1. Power (SMPS) Circuit Diagram .3-19 2. DVD DSP Circuit Diagram.3-23 3. Drive & RF Circuit Diagram .3-25 4. MPEG Circuit Diagram .3-27 5. Audio DM Circuit Diagram.3-29 6. -COM/Expander.3-31 7. DIGITRON & Key Circuit Diagra

32、m.3-33 8. Scart Circuit Diagram.3-35 9. Jack Circuit Diagram.3-37 CIRCUIT VOLTAGE CHART .3-39 WAVEFORMS .3-45 PRINTED CIRCUIT DIAGRAMS.3-47 1. MAIN P.C.BOARD.3-47 2. POWER, A/V, FRONT P.C.BOARD .3-49 3. KEY P.C.BOARD.3-51 4. POWER LED P.C.BOARD .3-51 3-2 ELECTRICAL TROUBLESHOOTING GUIDE No 5V_D or 5

33、V_A . No 5.2VA. Is 5.2VA section working? Is oscillation present at the Base of Q108? Replace Q108. Check L103, C116. Replace R111. Replace BD101. (Bridge rectifier) Check Fuse(F101). Is R111 1? Check D105. Replace Q101, 102. Is 5.2V applied to IC108 Pin 1? Is there a DC voltage at the (+) terminal

34、of BD101? Check R127, 128. (SHUTDOWN CKT) 1. Power(SMPS) Circuit No VF+ Is 5.2VA section working? Replace D109. Is oscillation present at the anode of D109? NO NO NO NO YES YES YESYES YESYES YES YES A.B. NO NO NO 3-3 Replace IC506. Refer to Front Part Check short Reconnect it. 2. -COM Circuit A. No

35、Power Does Logo appear on the screen? Is oscillation of X501 normal? Are IC503 Pins 14, 288 and 29 normal? Does no DISC appear? Does Hello appear at FLD? Is P5901 connected normally? Is P5901 Pin 23 normal? The waveform on A00:21 and D00:15 of IC501 normal? Are IC506 Pins 7, 8 normal? Replace Main B

36、/D. Check the oscillation Check short. OK Replace IC501 or IC503. Check power. (Refer to power) If power is normal OK POWER ON 1 1 YESYES YES YES YES YES YES YES A NO NO NO NO NO NO NO NONO NO A 3-4 B. Audio abnormal D. Open/Close abnormal Check the connection of P5901. Check IC501 Pins 13, 14. Check Audio jack. YES (If OK) YES NO NO YES YES (If OK) YES YES (If OK) YES (If OK) YES (If OK) Check MPEG_CLK Signal of MPEG part. Refer to Audio part. Refer to MPEG part. Replace B/D. Check Front. Reconnect it. Refer to SERVO part