Yamaha-AX-496-Service-Manual电路原理图.pdf

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1、AX-496/396 SERVICE MANUAL STEREO AMPLIFIER AX-496/396 100702 I CONTENTS SPECIFICATIONS. 1 TO SERVICE PERSONNEL . 2 REMOTE CONTROL PANEL . 2 IMPEDANCE SELECTOR . 2 FRONT PANELS. 3 REAR PANELS . 3 INTERNAL VIEW . 6 DISASSEMBLY PROCEDURES . 6 ADJUSTMENTS. 7 BLOCK DIAGRAM. 8 -COM DATA . 9 PRINTED CIRCUI

2、T BOARD . 1025 SCHEMATIC DIAGRAM . 2629 PARTS LIST . 3047 REMOTE CONTROL TRANSMITTER . 48 IMPORTANT NOTICE This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specif

3、ically YAMAHA Products, are already known and understood by the users, and have therefore not been restated. WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive components, and failure of the product

4、to perform as specified. For these reasons, we advise all YAMAHA product owners that any service required should be performed by an authorized YAMAHA Retailer or the appointed service representative. IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute auth

5、orization, certification or recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form. The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA a

6、re continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division. WARNING:Static discharges can dest

7、roy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss). IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power

8、to the unit. AX-496/396 P.O.Box 1, Hamamatsu, Japan RadioFans.CN 收音机爱好者资料库 AX-496/396 1 435 (17-1/8) Unit : mm (inch) 151 (5-15/16) 130 (5-1/8)350 (13-3/4)21 (13/16) 19.5 (3/4) 21.5 (7/8) 391 (15-3/8) I SPECIFICATIONS I Power Section Minimum RMS Output Power 8, 20Hz to 20kHz, 0.019% THD AX-49685W+8

9、5W AX-39660W+60W Maximum Output Power (EIAJ) 1kHz, 10% THD AX-496 8/6130W / 150W AX-396 6110W Dynamic Power (IHF) 8/6/4/2 AX-496130/150/185/220W AX-396100/120/140/150W DIN Standard Output Power 4, 1kHz, 0.7% THD AX-496120W AX-39695W IEC Output Power 8, 1kHz, 0.019% THD AX-496100W AX-39675W Power Ban

10、d Width 8, Half power, 0.04% THD10Hz to 50kHz Damping Factor 8, 20Hz to 20kHz240 Frequency Response 20Hz to 20kHz00.5dB Total Harmonic Distortion (20Hz to 20kHz) CD/DVD to SP OUT (8, Half power)0.008% Signal to Nise Ratio (IHF-A-Network) CD/DVD (Input Shorted, CD/DVD DIRECT AMP ON) 110dB PHONO (Inpu

11、t Shorted)88dB Residual Noise (IHF-A-Network) CD/DVD DIRECT AMP ON35V I Control Section Input Sensitivity / Impedance CD/DVD etc.150mV / 47k PHONO2.5mV / 47k Output Level / Impedance REC OUT150mV / 1.6k Headphone Jack Rated Output / Impedance 0.25V / 680 Channel Separation CD/DVD (Input 5.1k Termina

12、ted) 1kHz/10kHz65 / 50dB Tone Control Characteristics BASS10dB (20Hz) TREBLE10dB (20kHz) Continuous Loudness Control Attenuation-30dB (1kHz) I General Power Supply R, T modelsAC110/120/220/240V, 50/60Hz A modelAC240V, 50Hz B, G modelsAC230V, 50Hz Power Consumption AX-496Approx. 210W AX-396Approx. 15

13、0W AC Outlets (Switched) R, T, G models100W Max x 3 A, B models100W Max x 1 Dimensions (W x H x D)435 x 151 x 391mm (17-1/8 x 5-15/16 x 15-3/8) Weight AX-4969.5 kg (21lbs) AX-3968.7 kg (19lbs 3oz) Accessories Remote Control Transmitter Batteries Color Gold / Black / Titan * Specifications subject to

14、 change without notice. R . General modelT . China model A . Australia modelB . British model G. European model DIMENSIONS RadioFans.CN 收音机爱好者资料库 AX-496/396 IMPEDANCE SELECTOR WARNING: Do not change the IMPEDANCE SELECTOR switch setting while the power to this unit is on, otherwise this unit may be

15、 damaged. 2 TAPE STANDBY/ON DECK A/B DIR BDIR A A/B/C/D/EPRESET CD/DVDMDTAPE TUNERAUX RAX9V499920 PHONO + CD TUNER DISC SKIP +VOLUME WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product c

16、ontains LEAD. In addition, other electrical/electronic and /or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLD

17、ER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA- SON WHATSOEVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor! If you come in contact with solder or components located insid

18、e the enclosure of this product, wash your hands before handling food. I TO SERVICE PERSONNEL 1. Critical Components Information. Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measu

19、rement (For 120V Models Only). When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits. GMeter impedance should be equivalent to 1500 ohm shunted by 0.15F. GLeakage current must not exceed 0.5mA. GBe sure to test fo

20、r leakage with the AC plug in both polarities. I REMOTE CONTROL PANELI IMPEDANCE SELECTOR AX-496/396 3 MAX-496 MAX-396 I FRONT PANELS I REAR PANELS (AX-496) R model AX-496/396 4 B model G model T model I REAR PANELS (AX-396) R model AX-496/396 5 B model G model A model J model AX-496/396 1 1 2 3 3 4

21、4 5 5 6 7 77 1 790A8 32546 B 6 I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) 1. Removal of Top Cover Remove 4 screws (1) and 4 screws (2) in Fig. 1. 2. Removal of Front Panel a. Remove 6 screws (3) in Fig. 1. 3. Checking and Parts Replacement of MAIN P.C.B. (1) a. Disconnect the

22、power cord from the AC outlet. b. Remove 3 screws (4) attaching the Speaker terminal and Impedance Selector in Fig. 1. c. Remove 2 screws (5) and remove 1 plastic rivet (6) in Fig. 1, then remove the Sub Chassis. d. Remove 4 screws (7) in Fig. 1, then remove the MAIN P.C.B. (1) with Heat Sink and Ch

23、assis. Fig. 1 I INTERNAL VIEW 1 AX-496: MAIN P.C.B. (6) / AX-396: MAIN P.C.B. (7) 2 MAIN P.C.B. (2) 3 MAIN P.C.B. (1) 4 MAIN P.C.B. (3) 5 FUNCTION P.C.B. (4) 6 FUNCTION P.C.B. (5) 7 MAIN P.C.B. (9) 8 MAIN P.C.B. (8) 9 FUNCTION P.C.B. (7) 0 FUNCTION P.C.B. (6) A FUNCTION P.C.B. (1) B FUNCTION P.C.B.

24、(2) AX-496/396 R553 R552 R560 R561 R553 (L ch) R561 (R ch) R552 (L ch) R560 (R ch) 0.1mV10mV Cut I ADJUSTMENTS Confirmation of Idling Current Right after Power is switched ON, confirm the voltages measures at R553 (L ch) and R561 (R ch) are between 0.1mV to 10mV. If it exceeds 10mV, open (cut off) R

25、552 (L ch), R560 (R ch) and reconfirm the voltage. 7 AX-496/396 10dB 10dB PHONO CD SP A SP B PHONES TUNER AUX TAPE1 PB TAPE1 REC MD PB MD REC CD DIRECT AMP PHONO EQ AMP CD DIRECT AMP CD DIRECT AMP MOTOR DRIVER ON ON OFF OFF31.8dB M Main VR 10dB SMU LOUDNESS BALANCE TONE CONTROL AUDIO MUTE A B POWER

26、AMP RYSP LB 15 15 B B LB 12S + + + + + + AUDIO MUTE SMU Rec Select Rec Select Data Power ON Power ON/OFF RYPS Remote Control Input Select Data Input Select Main VR Protection RYSP U-COM RYPS 10dB 10dB PHONO CD SP A SP B PHONES TUNER AUX TAPE1 PB TAPE1 REC TAPE2 PB TAPE2 REC CD DIRECT AMP PHONO EQ AM

27、P CD DIRECT AMP CD DIRECT AMP MOTOR DRIVER ON ON ON OFF OFF OFF33.5dB M Main VR 10dB SMU RYPS LOUDNESS BALANCE TONE CONTROL PURE DIRECT AUDIO MUTE A B POWER AMP RYSP LB 15 15 B B LB 12S + + + + + + AUDIO MUTE SMU Rec Select Rec Select Data Power ON Power ON/OFF RYPS Remote Control Input Select Data

28、Input Select Main VR Protection RYSP U-COM I BLOCK DIAGRAM 8 M AX-496 M AX-396 AX-496/396 No.PortI/OFormREFunction 1P53II 2P17I/OOCEI Chip Enable (Input selector) 3P16I/OOCK Clock S-CLK 4P15I/OODATA Data T x D 5P14I/OO 6P13I/OOTMO Tape Monitor 7P12I/OOVRUP Motor Volume (UP) 8P11I/OOVRDN Motor Volume

29、 (DOWN) 9P10I/OORYPS Power Relay 10P27IIENR Rotary Encoder (Right) 11P26IIENL Rotary Encoder (Left) 12P25IID34/5 AX-496, 396/596 Detect H: 496, 396 L: 596 13P24II 14P23IIREC Rec Out Selector Detect IN3 15P22IIPRDC Protection (DC) IN2 16P21IIPRI Protection (Overload) IN1 17P20IIPRPS Protection (Power

30、 Supply) IN0 18VrefIVREF 19XinIXIN 20XoutOXOUT 21VssVSS 22VccVCC 23P50IIPRINH Release the Protection 24P61I/OO 25/RESETI/RESET 26P30IIPD Power Down Detect INT0 27P31IIREM Remote Control INT1 28P32IID43 AX-493/393 Detect 29P33IITPM Tape Monitor 30P40I/OOLEDTM LED (Tape Monitor) 31P41I/OOMUTE Mute 32P

31、42I/OORYSP Speaker Relay 33P43I/OOLSBY LED (Power) 34P00I/OIPS Power Key On Wakeup 35P01I/OIREM Remote Control (Wakeup) Key On Wakeup 36P02I/OOLEDP LED (Phono) 37P03I/OOLEDTM LED (Tuner) 38P04I/OOLEDC LED (CD) 39P05I/OOLEDM LED (Tape) 40P06I/OOLEDTP LED (MD) 41P07I/OOLEDA LED (AUX) 42P52II 9 I -COM

32、DATA IC101 : M37478M4-409SP ABCDEFGHIJ 1 2 3 4 5 6 7 AX-496/396 To FUNCTION (7) To FUNCTION (6) HL E HR RYSP A B E R E L E 15 -15 YE BE BE RE RE OR OR To MAIN (6) IMPEDANCE SELECTOR SPEAKERS To FUNCTION (1) MU S12 GND GND RYSP RYPS PRPS PRI PRD VRP VRG 11 I PRINTED CIRCUIT BOARD (Foil side) 10 P.C.B

33、. MAIN (3) AX-496 P.C.B. MAIN (1) ABCDEFGHIJ 1 2 3 4 5 7 AX-496/396 6 POWER To MAIN P.C.B. (2) POWER TRANSFORMER To MAIN (2) GYBR POWER TRANSFORMER To MAIN (1) REORBEYEBEREOR POWER TRANSFORMER To MAIN (2)To MAIN (4) GYBRBRWHYEREORRE WHREYE REBROR To MAIN (5) To MAIN (9) To MAIN (1) To MAIN (8) (B, G

34、 models) To MAIN (5) (R, T models) AC OUTLETS E +12 RYPS GY BR WH BE 12 I PRINTED CIRCUIT BOARD (Foil side) 13 AX-496 P.C.B. MAIN (2) P.C.B. MAIN (4) (R, T models) P.C.B. MAIN (5) (R, T models) P.C.B. MAIN (6) P.C.B. MAIN (8) (B, G models) P.C.B. MAIN (9) ABCDEFGHIJ 1 2 3 4 5 6 7 AX-496/396 REC OUT

35、INPUT VOLUME CD/DVD DIRECT AMPPURE DIRECT 142 2221 TLO E TRO -15 TLI 15 TRI E L E R CE DATA CL -15 L E R 15 CDDL E CDDR CDM VRG VRP PRO PRI PRPS RYPS RYSP DG DG S12 MU LSBY PH TU CD MD TA AU 5V REM DG PS GND CD-D TPMLED P-D/5V To FUNCTION (11) To FUNCTION (6) To FUNCTION (4) To FUNCTION (8) To MAIN

36、(1) 1 8 BASSTREBLEBALANCELOUDNESS -15 +15 E L E R E To MAIN (1) To FUNCTION (1) TLO E TRO -15 TLI 15 TRI E L E R 1514 AX-496 I PRINTED CIRCUIT BOARD (Foil side) P.C.B. FUNCTION (1) P.C.B. FUNCTION (2) P.C.B. FUNCTION (3) P.C.B. FUNCTION (6) ABCDEFGHIJ 1 2 3 4 5 7 AX-496/396 6 CD/DVD DIRECT AMPPURE D

37、IRECT To FUNCTION (1) GND CD-D TPMLED P-D/5V POWER To FUNCTION (8) LSBY 5V STANDBY/ON PS DG REM 5V To FUNCTION (8) PHONOTUNERCD/DVDTAPEMDAUX To FUNCTION (1) To FUNCTION (10) To FUNCTION (9) LSBY PH TU CD MD TA AU 5V REM DG PS LSBY 5V PS DG REM 5V PHONES SPEAKERS AB To MAIN (1) HL E HR RYSP A B CD/DV

38、D PHONO To FUNCTION (4) CDR E CDL -15 PHL E PHR 15 TUNER AUX IN OUT TAPE IN OUT MD 1 1 15 15 16 16 30 30 CDR E CDL -15 PHL E PHR 15 CE DATA CL -15 L E R 15 CDDL E CDDR CDM To FUNCTION (5) To FUNCTION (1) 1617 AX-496 I PRINTED CIRCUIT BOARD (Foil side) P.C.B. FUNCTION (4) P.C.B. FUNCTION (5) P.C.B. F

39、UNCTION (7) P.C.B. FUNCTION (8) P.C.B. FUNCTION (9) P.C.B. FUNCTION (10) P.C.B. FUNCTION (11) ABCDEFGHIJ 1 2 3 4 5 6 7 AX-496/396 IMPEDANCE SELECTOR SPEAKERS To FUNCTION (7) To FUNCTION (6) HL E HR RYSP A B E R E L E 15 -15 YE RE RE OR OR To MAIN (6) To FUNCTION (1) MU S12 GND GND RYSP RYPS PRPS PRI

40、 PRD VRP VRG I PRINTED CIRCUIT BOARD (Foil side) P.C.B. MAIN (3) AX-396 P.C.B. MAIN (1) 1918 ABCDEFGHIJ 1 2 3 4 5 7 AX-496/396 6 To MAIN (9) To MAIN (1) To MAIN (8) (A, B, G models) To MAIN (5) (R model) AC OUTLETS E +12 RYPS GY BR WH BE POWER To MAIN P.C.B. (2) POWER TRANSFORMER To MAIN (2) GYBR PO

41、WER TRANSFORMER To MAIN (1) REORBLORRE POWER TRANSFORMER To MAIN (2)To MAIN (4) GYBRBRWHYEREORRE WHREYE REBROR To MAIN (5) I PRINTED CIRCUIT BOARD (Foil side) AX-396 P.C.B. MAIN (2) P.C.B. MAIN (4) (R model) P.C.B. MAIN (5) (R model) P.C.B. MAIN (7) P.C.B. MAIN (8) (A, B, G models) P.C.B. MAIN (9) 2

42、021 ABCDEFGHIJ 1 2 3 4 5 6 7 AX-496/396 INPUT VOLUME CD/DVD DIRECT AMP 142 2221 TLO E TRO -15 TLI 15 TRI E L E R CE DATA CL -15 L E R 15 CDDL E CDDR CDM VRG VRP PRO PRI PRPS RYPS RYSP DG DG S12 MU LSBY PH TU CD MD TA AU 5V REM DG PS GND CD-D TPMLED P-D/5V To FUNCTION (11) To FUNCTION (6) To FUNCTION

43、 (4) To FUNCTION (8) To MAIN (1) 1 8 BASSTREBLEBALANCELOUDNESS -15 +15 E L E R E To MAIN (1) To FUNCTION (1) TLO E TRO -15 TLI 15 TRI E L E R AX-396 2322 P.C.B. FUNCTION (1) P.C.B. FUNCTION (2) P.C.B. FUNCTION (3) P.C.B. FUNCTION (6) I PRINTED CIRCUIT BOARD (Foil side) ABCDEFGHIJ 1 2 3 4 5 7 AX-496/

44、396 6 TAPE MONITOR To FUNCTION (2) POWER To FUNCTION (8) LSBY 5V PHONOTUNERCD/DVDTAPEMDAUX To FUNCTION (1) To FUNCTION (10) To FUNCTION (9) LSBY PH TU CD MD TA AU 5V REM DG PS LSBY 5V PS DG REM 5V CD/DVD DIRECT AMPTAPE MONITOR To FUNCTION (1) GND CD-D TPMLED P-D/5V STANDBY/ON PS DG REM 5V To FUNCTIO

45、N (8) PHONES SPEAKERS AB To MAIN (1) HL E HR RYSP A B CD/DVD PHONO To FUNCTION (4) CDR E CDL -15 PHL E PHR 15 TUNER AUX IN OUT TAPE IN OUT MD 1 18 9 1 15 15 16 16 16 30 30 CDR E CDL -15 PHL E PHR 15 CE DATA CL -15 L E R 15 CDDL E CDDR CDM To FUNCTION (5) To FUNCTION (1) AX-396 2425 I PRINTED CIRCUIT

46、 BOARD (Foil side) P.C.B. FUNCTION (4) P.C.B. FUNCTION (5) P.C.B. FUNCTION (7) P.C.B. FUNCTION (8) P.C.B. FUNCTION (9) P.C.B. FUNCTION (10) P.C.B. FUNCTION (11) P.C.B. FUNCTION (12) A 1 2 3 4 5 6 7 8 9 BCDEFGHIJKL AX-496 # All voltage are measured with a 10M/V DC electric volt meter. # Components ha

47、ving special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 26 SCHEMATIC DIAGRAM PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. BCE 2SA1695 2SC4466 2SA1145 2SA970 2SC2705 2SC1815? 2SA1015? 2SC2240? 2SA893A 2SC1890A S4VB202SA13582SC44882SD1915F 2SC1740S DTC144ES 2SA933S EE C C B