NAD-C315-int-sm维修电路原理图.pdf

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1、NAD SERVICE MANUAL C 315BEE STEREO AMPLIFIER C 315BEE STEREO AMPLIFIER RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION.3- 4 REAR PANEL/FRONT PANEL VIEW.5 SPECIFICATIONS.6 WIRING DIAGRAM7 BLOCK DIAGRAM. .8- 12 ALIGNMENT PROCEDURE.13 SCHEMATICS.14- 16 PCB LAYOUT.17- 19 TR

2、OUBLE SHOOTING GUIDE.20 ELECTRICAL PARTS LIST.21- 27 EXPLODED VIEW.28 EXPLODED VIEW PARTS LIST.29 PACKING VIEW PARTS LIST.30 RadioFans.CN 收音机爱 好者资料库 PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACT

3、URER S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES. T

4、O DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM AC LINE SHOCK. SAFETY CHECKS AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED. A CHECK SHOULD BE MADE OF THE FOLLOWING. SUBJECT : FIRE CONNECT A 1500

5、 OHM 10 WATT RESISTOR, PARALLELED BY A .15 MFD, 150V AC TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE AC VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE AC PLUG AND REPEAT

6、 AC VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY. SUBJECT : GRAPHIC SYMBOLS SUBJECT : TIPS ON PROPER INSTA

7、LLATION 1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW. 2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS WHERE STEAM LEAKA

8、GE IS A FACTOR, ETC. 3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILATION. 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORY APPROVED

9、 MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIO

10、NS. 5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED. 6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS AC

11、ROSS THRESHOLDS OR DEEP PILE CARPETS. 7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V. S OF THE SAME OR LARGER SCREEN SIZE. 8. CAUTIO

12、N CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY. THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINS

13、ULATED “ DANGEROUS VOLTAGE” WITHIN THE PRODUCT S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN

14、 THE LITERATURE ACCOMPANYING THE APPLIANCE. RadioFans.CN 收音机爱 好者资料库 SERVICING PRECAUTIONS CAUTION : Before servicing the A/V Receiver covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE : if unforeseen circumstances create conflict between the f

15、ollowing servicing precautions and any of the safety precautions in this publication, always follow the safety precautions. Remember Safety First: General Servicing Precautions 1. Always unplug the A/V Receiver AC power cord from the AC power source before: (1) Removing or reinstalling any component

16、, circuit board, module, or any other assembly. (2) Disconnecting or reconnecting any internal electrical plug or other electrical connection. (3) Connecting a test substitute in parallel with an electrolytic capacitor. Caution : A wrong part substitution or incorrect polarity installation of electr

17、olytic capacitors may result in an explosion hazard. 2. Do not spray chemicals on or near this A/V Receiver or any of its assemblies. 3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner

18、, cottontipped swab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service manual might be equipped. 5. Do not apply AC power to th

19、is A/V Receiver and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. 6. Always connect test instrument ground lead to the appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last. I

20、nsulation Checking Procedure Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter(500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should

21、 be more than 1M-ohm. Note 1 : Accessible Conductive Parts including Metal panels, Input terminals, Earphone jacks, etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostaticall

22、y Sensitive (ES) Devices. Examples of typical Es devices are integrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling

23、any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to apply

24、ing power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder

25、ES devices. 4. Use only an antistatic solder removal device. Some solder removal devices not classified a “ anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do not use freonpropelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. D

26、o not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material). 7. lmmediately before remov

27、ing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodi

28、ly motions when handing unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.) RadioFans.CN 收音机爱 好者资料库 ? ? VOLUME TREBLEBAL

29、ANCEBASS 5 NDACEEB513 4689 7 3 12 TONE DEFEAT PHONESTAPEVIDEOTUNERCDAUXMPDISC Stereo Integrated Amplifier C 315BEE ? ? ? ? ? 1. DISC INPUT 2. CD INPUT 3. VIDEO INPUT 4. AUX INPUT 5. TUNER INPUT 6. TAPE IN/OUT 7. SPEAKERS OUT 8. AC LINE CORD 9. POWER SWITCH 1. POWER 2. POWER/STAND BY/ PROTECTION LED

30、3. HEADPHONE 4. INPUT SELECTOR 5. IR RECEIVER 6. TONE CONTROLS 7. TONE DEFEAT 8. BALANCE CONTROL 9. VOLUME CONTROL RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS PREAMP IN , SPEAKERS OUT CONTINUOUS AVERAGE POWER 40 W (16 dBW) OUTPUT INTO 8 OHMS OR 4 OHMS (Min. power per channel, 20 Hz 20 kHz, with no more t

31、han rated distortion) THD + Noise 200 Input Impedance R = 50 kohms C = 100pF Input sensit ivit y (for rated output into 8 ohms) 200 mV Volt age gain 39 dB Fr equency r esponse 20 Hz 20 kHz +/- 1.0 dB (tone defeat off) +/- 0.2dB (tone defeat on) Signal / Noise r at io, A-weighted 95dB r ef . 1 W 1 1

32、1dB r ef . 40 W SMPTE I.M. 0.02% (Intermodulation Distortion, 60 Hz + 7 kHz, 4:1, from 250 mW to rated output) IHF I.M. 0.01% (CCIF IM Distortion, 19 + 20 kHz at rated output) Headphones Out put Impedance 68 ohms Maximum input signal 7 V CONTROLS Treble +/- 5 dB at 10 kHz Bass +/- 8 dB at 100 Hz DIM

33、ENSIONS AND WEIGHTS Net Weight 5 .25 kg ( 1 1.5 Ib) Shipping Weight 6.5 kg (14.3lb) DIMENSION (WHD) 435 X70 X 242mm RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 TAPE OUT L DISC L DISC R CD R VIDEO R AUX R TAPE1 IN R TAPE1 IN L AUX L VIDEO L CD L PREAPMAMP CIRCUIT BASS RT31 RT32 RT34 TREBLE BALANC

34、E SW31 TONE DEFEAT RT33 VOLUME PRE-OUT L PRE-OUT R MAIN IN R MAIN IN L POWER AMP CIRCUIT L CIRCUIT R POWER AMP PROTECTION CIRCUIT RL301 MCU(W78E52C) JK31 R330 POSISTOR (80 DEGREE C) HEADPHONE TUNER R TUNER L CONTROL MP R MP L TAPE OUT R Speaker R Speaker L JQX-115F/ 24 VOL- VOL+ VOLUME CONTROL CIRCU

35、IT (REMOTE) MUTE Q120 MUTE Q220 MUTE CIRCUIT FOR RECORD OUT TEMP COMPENSATION CIRCUIT(Q122,Q222 ON THE MAIN HEATSINK) INPUT AND STANDBY INDICATION LEDS INPUT SELECTION IC(TC9164CNG) +/ -17V SUPPLY CIRCUIT +/ -45V SUPPLY CIRCUIT MUTE Q105 MUTE Q205 MAIN MUTE CIRCUIT BLOCK DIAGRAM RadioFans.CN 收音机爱 好者

36、资料库 +5V Sandby control line 18V Power Supply Control Circuit +5V Input selection Key s and LEDS +5V Main Mute Mute Circuit Record Out Circuit IC503 V S G IR receiver D501 RED BLUE Standby LED MICROPROCESSOR CONNECTION DIAGRAM AMBER Volume Circuit NC 1 NC 2 NC 3 Vss 4 SDA 5 SCL 6 NC 7 Vcc 8 IC502 24C

37、01 C504 27P C505 27P X501 11.0592MHz PHONE5 MP IN DATA CLK STB U301 TC9164 Input Selection IC P1.0 1 RST 9 RXD/P3.0 10 TXD/P3.1 11 INT0/P3.2 12 INT1/P3.3 13 T0/P3.4 14 T1/P3.5 15 WR/P3.6 16 RD/P3.7 17 XTAL2 18 XTAL1 19 VSS 20 P2.0/A8 21 P2.1/A9 22 P2.2/A10 23 P2.3/A11 24 P2.4/A12 25 P2.5/A13 26 P2.6

38、/A14 27 P2.7/A15 28 PSEN 29 ALE 30 EA 31 P0.7/AD7 32 P0.6/AD6 33 P0.5/AD5 34 P0.4/AD4 35 P0.3/AD3 36 P0.2/AD2 37 P0.1/AD1 38 P0.0/AD0 39 VDD 40 P1.1 2 P1.2 3 P1.3 4 P1.4 5 P1.5 6 P1.6 7 P1.7 8 IC501 AT89S51 RadioFans.CN 收音机爱 好者资料库 24C01 KEY BOARDIC502 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

39、? ? ? ? ? ? ? ? ? ? 1 2 3 45 6 7 8 NC NC NC VSS VCC NC SCL SDA RadioFans.CN 收音机爱 好者资料库 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40Vcc P0.0(AD0) P0.1(AD1) P0.2(AD2) P0.3(AD3) P0.4(AD4) P0.5(AD5) P0.6(AD6) P0.7(AD7) P2.0(A8) P2.1(A9) P

40、2.2(A10) P2.3(A11) P2.4(A12) P2.5(A13) P2.6(A14) P2.7(A15) PSEN ALE/ PROG EA/ VPP (T2)P1.0 (T2EX)P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RST (RXD)P3.0 (TXD)P3.1 (INT0)P3.2 (INT1)P3.3 (T1)P3.5 (T0)P3.4 (WR)P3.6 (RD)P3.7 XTAL1 XTAL2 GND AT89S51/ W78E052C MAIN BOARD : IC501 PIN CONFIGURATION OSC WATCH DOG P

41、ORT 1 LATCH LATCH LATCH LATCH PORT 0 PORT 2 PORT 0 DRIVERS PORT 1 DRIVERS PORT 2 DRIVERS PORT 3 DRIVERS QUICK FLASH RAM RAM ADDR. REGISTER REGISTER B ACC STACK PIONTER PROGRAM ADDRESS REGISTER BUFFER PC INCREMENTER PROGRAM COUNTER DUAL DPTR INTERRUPT,SERIAL PORT AND TIMER BLOCKS TMP2 TMP1 ALU PSW TI

42、MING AND CONTROL INSTRUCTION REGISTER P1.0 - P1.7P3.0 - P3.7 P2.0 - P2.7P1.0 - P1.7 PORT 3 PORT ISP PROGRAM LOGIC RadioFans.CN 收音机爱 好者资料库 L-S1 2 L-S2 3 L-S3 4 L-S4 5 L-S5 7 L-S6 8 L-S7 10 L-S8 11 L-COM 1 6 L-COM 2 9 L-COM 3 12 STB 13 GND 14 R-S1 27 R-S2 26 R-S3 25 R-S4 24 R-S5 22 R-S6 21 R-S7 19 R-S

43、8 18 R-COM 1 23 R-COM 2 20 R-COM 3 17 DATA 16 CLK 15 Vss 1 Vdd 28 MAIN BOARD:U301 TC9164CNG PIN CONFIGURATION RadioFans.CN 收音机爱 好者资料库 ? A. LOWEST VOLUME ADJUSTMENT 3. Connect a oscilloscope to Left channel binding posts. 1. Turn down the volume potentiometer to the lowest setting. 2. Input a high vo

44、ltage signal such as 5V from CD input. 4. Observing the oscilloscope, adjust VR102, to ma ke the output of speaker the lowest level possible. 5. Adjust VR202 as in line #4 above, to make the output of the speaker the lowest level possible. B. IDLING CURRENT 4. Connect the DMM to TP3 & TP4, adjust VR

45、201 and then fine adjust VR203 for 7mV +/- 1mV. 3. Connect the DMM to TP1 & TP2, adjust VR101 and then fine adjust VR103 for 7mV +/- 1mV. 1. Connect the DMM to TP1 & TP2 as well as TP3 &TP4, adjust the idle current to 12.5mV via VR201/101. TP1TP2 TP3TP4 VR101 VR201 VR202 VR203 MAIN BOARDC315BEE VR10

46、3 2. Place the top cover back on the unit and let unit run idle for 10 minutes (no input signal nor load). 5. Install the top cover. VR102 5. Connect a oscilloscope to Right channel binding posts. RadioFans.CN 收音机爱 好者资料库 RCA31A L RCA31C L RCA32A L RCA32C L RCA33A L RCA33C L RCA33E L R101 470 R103 470 R105 470 C101 100p C102 100p C103 100p R107 470 R109 470 R111 470 C104 100p C105 100p C106 100p R113 470 C107 100p RCA31B R RCA31D R RCA32B R RCA32D R RCA33B R RCA33D R RCA33F R R201 470 R203 470 R205 470 C201 100p C202 100p C203 100p R207