Yamaha-DSPAX-620-Service-Manual电路原理图.pdf

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1、AV AMPLIFIER 100763 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 specifically YAMAHA Products, are already known and understood by the users, and have therefo

2、re 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 to perform as specified. For these reasons, we advise all YAMAHA product owners that an

3、y 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 authorization, certification or recognition of any applicable technical capabilities, or es

4、tablish 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 are continually striving to improve YAMAHA products. Modifications are, therefore, inevi

5、table 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 destroy expensive components. Discharge any static electricity your body may have accumulat

6、ed 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 to the unit. IMPORTANT NOTICE DSP-AX620 SERVICE MANUAL I CONTENTS TO SERVICE PERSONNEL

7、. 1 FRONT PANEL . 1 REAR PANELS . 2 SPECIFICATIONS .3 5 INTERNAL VIEW . 5 DISASSEMBLY PROCEDURES .6 8 SELF DIAGNOSIS FUNCTION.9 27 AMP CHECK . 28 IC DATA .29 36 DISPLAY DATA .37 38 PIN CONNECTION DIAGRAM . 39 BLOCK DIAGRAM .40 43 PRINTED CIRCUIT BOARD .44 67 SCHEMATIC DIAGRAM .68 73 PARTS LIST .74 9

8、2 REMOTE CONTROL TRANSMITTER.93 95 DSP-AX620 RadioFans.CN 收音机爱 好者资料库 DSP-AX620 DSP-AX620 I TO SERVICE PERSONNEL Critical Components Information Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. AC LEAKAGE

9、 TESTER OR EQUIVALENT EQUIPMENT UNDER TEST INSULATING TABLE WALL OUTLET 1 IMPEDANCE SELECTOR WARNING Do not change the IMPEDANCE SELECTOR switch setting while the power to this unit is on, otherwise this unit may be damaged. I FRONT PANEL SILENTVIDEO AUX PHONESS VIDEOVIDEOL AUDIO ROPTICAL 6CH INPUTI

10、NPUT MODE INPUT VOLUME EFFECTSET MENU DSP PROGRAM BASSTREBLESPEAKERS AB OFFONOFFON STANDBY /ON D I G I T A L BASS EXTENSION + SURROUND D I G I TA L + A/B/C/D/E RadioFans.CN 收音机爱 好者资料库 DSP-AX620 DSP-AX620 2 M R, T models I REAR PANELS 240V 50 M B model M G model DSP-AX620 DSP-AX620 3 I GENERAL Power

11、Supply B, G models . . . . . . . . . . . . . . . . . . . . . . . AC 230V, 50Hz R, T models . . . . . . . . . . . AC 110/120/220/240V, 50/60Hz Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . 260W Standby Power Consumption B, G models . . . . . . . . . . . . . . . . . . . . . .

12、 . . . . . . . . . . 0.9W Maximum Power Consumption (R model only) . . . . . 610W AC Outlets R, T models, Switched x 2 . . . . . . . . . . . 50W max (Total) G model, Switched x 2 . . . . . . . . . . . . . 100W max (Total) B mode, Switched x 1 . . . . . . . . . . . . . . . . . . . . 100W max Dimensio

13、ns (W x H x D) . . . . . . . . . . . . . 435 x 151 x 390mm (17-1/8” x 5-15/16” x 15-3/8”) Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.5 kg (23 lbs 2oz) Finish . . . . . . . . . . . . . . . . . . . . . . . Black color (B, G models) Gold color (R, T, G models) Titanium color (G mod

14、el) Accessories . . . . . . . . . . . . Remote Control Transmitter x 1 Battery (size AAA, R03) x 4 * Specifications subject to change without notice. R . . . . . . . General model T . . . . . . . . . China model B . . . . . . . . British model G . . . . . European model I AUDIO SECTION Minimum RMS O

15、utput Power per Channel MAIN, 20Hz to 20kHz, 0.06% THD, 8 . . . . . 90W+90W CENTER, 20Hz to 20kHz, 0.06% THD, 8 . . . . . . . 90W REAR, 20Hz to 20kHz, 0.06% THD, 8 . . . . . 90W+90W Minimum RMS Output Power per Channel MAIN, 1kHz, 0.06% THD, 8 . . . . . . . . . . . 100W+100W CENTER, 1kHz, 0.06% THD,

16、 8 . . . . . . . . . . . . . . 100W REAR, 1kHz, 0.06% THD, 8 . . . . . . . . . . . 100W+100W Maximum Power per Channel (R, T models only) MAIN, 1kHz, 10% THD, 8, EIAJ . . . . . . . . . 115W+115W CENTER, 1kHz, 10% THD, 8, EIAJ . . . . . . . . . . . 115W REAR, 1kHz, 10% THD, 8, EIAJ . . . . . . . 115W

17、+115W Dynamic Power per Channel MAIN, 8/6/4/2 . . . . . . . . . . . . . . . . . . 120/140/175/210W DIN Standard Output Power per Channel ( G model only) MAIN, 1kHz, 0.7% THD, 4 . . . . . . . . . . . . 130W+130W CENTER, 1kHz, 0.7% THD, 4 . . . . . . . . . . . . . . . 130W REAR, 1kHz, 0.7% THD, 4 . .

18、. . . . . . . . . . 130W+130W IEC Power (G model only) MAIN, 1kHz, 0.06% THD, 8 . . . . . . . . . . . 100W+100W Damping Factor MAIN, 20Hz to 20kHz, 8 . . . . . . . . . . . . . . . . 80 or more Input Sensitivity/Impedance PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5mV/47k CD, etc

19、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mV/47k EXT. DECODER MAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mV/47k CENTER . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mV/47k REAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mV/47k

20、SUBWOOFER . . . . . . . . . . . . . . . . . . . . . . 150mV/47k Maximum Input Signal Level PHONO MM, 1kHz, 0.1% THD (Effect on) . . . . . . 100mV CD, etc, 1kHz, 0.5% THD (Effect on) . . . . . . . . . . . . 2.2V Output Level/Impedance REC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 150m

21、V/1.2k PRE OUT (B, G models only) . . . . . . . . . . . . . 2.1V/1.2k SUBWOOFER (MAIN SP : SMALL) . . . . . . . . . . . .4.0V/1.2k Headphone Jack Rated Output/Impedance CD, etc (1kHz, 150mV, 8) . . . . . . . . . . . . . . . 0.4V/560 Frequency Response CD, etc (10Hz to 100kHz, MAIN L/R) . . . . . . .

22、 . +0/-3.0dB RIAA Equalization Deviation PHONO MM (20Hz to 20kHz) . . . . . . . . . . . . . . . 00.5dB Total Harmonic Distortion (20Hz to 20kHz) PHONO MM to REC OUT (1V) . . . . . . . . . . . . . . . . 0.02% CD, etc, to SP OUT L/R (45W/8) . . . . . . . . . . . . . 0.06% Signal-to-Noise Ratio (IHF-A-

23、Network) PHONO MM to REC OUT, Input Shorted 5mV R, T models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86dB B, G models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81dB CD, etc, to SP OUT Input Shorted 250mV (Effect off) . . . . . . . . . . . . . 100dB Residual N

24、oise (IHF-A-Network) MAIN L/R, SP OUT . . . . . . . . . . . . . . . . . . . . . . . . . 150V Channel Separation (Vol. 30dB, Effect off) PHONO MM, Input Shorted, 1kHz/10kHz . . . . 60dB/55dB CD, etc, Input 5.1k Shorted, 1kHz/10kHz . . 60dB/45dB Tone Control Characteristics BASS :Boost/cut . . . . . .

25、 . . . . . . . . . . . . 10dB (50Hz) Turnover Frequency . . . . . . . . . . . . . . . . 350Hz TREBLE : Boost/cut . . . . . . . . . . . . . . . . . .10dB (20kHz) Turnover Frequency . . . . . . . . . . . . . . . 3.5kHz Filter Characteristics MAIN, REAR SP SMALL (H.P.F.) . . fc = 90Hz, 12dB/oct. SUBWOO

26、FER OUT (L.P.F.) . . . . . . fc = 90Hz, 18dB/oct. Bass Extension . . . . . . . . . . . . . . . . . . . . . . . . . .+6dB (60Hz) I SPECIFICATIONS I VIDEO SECTION Video Signal Type B, G models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PAL R, T models . . . . . . . . . . . . . .

27、. . . . . . . . . . . . . NTSC/PAL Composite Video Signal Level . . . . . . . . . . . . . . 1Vp-p/75 S-Video Signal Level Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Vp-p/75 C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.286Vp-p/75 Component Signa

28、l Level Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Vp-p/75 Cb/Cr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.7Vp-p/75 Video Maximum Input Level . . . . . . . . . . . . . . . . . .1.5Vp-p Video Signal-to-Noise Ratio . . . . . . . . . . . . . . . .

29、. . . . 50dB Monitor Output Frequency Response Composite Video Signal . . . . . . . . . . 5Hz 10MHz, 3dB S-Video Signal . . . . . . . . . . . . . . . . . 5Hz 10MHz, 3dB Component Signal . . . . . . . . . . . . . . . DC 30MHz, 3dB DSP-AX620 DSP-AX620 4 G DIMENSIONS 352.5 (137/8) 390 (155/16) 16 (5/8)

30、 435 (171/8) 21 (13/16) 21.5 (13/16) 130 (51/8) 151 (515/16) Units : mm (inch) Manufactured under license from Dolby Laboratories. Dolby Digital, AC-3, Pro Logic, and the double-D symbol V are trademarks of Dolby Laboratories. 1992- 1997 Dolby Laboratories. All rights reserved. Manufactured under li

31、cense from Digital Theater Systems, Inc. US Pat. No. 5,451,942 and other world-wide patents issued and pending. DTS, DTS Digital Surround, are trademarks of Digital Theater Systems, Inc. copyright 1996 Digital Theater Systems, inc. All rights reserved. S: S video signal V: Composite video signal O:

32、YES X: NO : NO CARE Caution: Superimposing function is not usable for component signals. G SUPERIMPOSING Input DVD, etc.OutputSuperimposing TerminalSignalMonitor connection SOOO (On screen) VOX SOXX VOO (On screen) SOOO (On screen) VXX SOXX VXO (Blue back) SXX VOO (On screen) SXO (Blue back) VXO (Bl

33、ue back) DSP-AX620 DSP-AX620 5 I INTERNAL VIEW G SET MENU TABLE No.SET MENUPRESET VALUESETTING RANGES 1.SPEAKER SET 1ACENTER SPEAKERLARGELARGE/SMALL/NONE 1BMAIN SPEAKERLARGELARGE/SMALL 1CREAR L/R SPEAKERLARGELARGE/SMALL/NONE 1DLFE/BASS OUTBOTHSUBWOOFER/MAIN/BOTH 1EMAIN LEVELNORMALNORMAL/10dB 2.L/R B

34、ALANCE0L 0 R (0.5 step) (L/R 10.0) 3.HP TONE CTRLBASS : 0dB6dB +3dB (1dB step) TREBLE : 0dB6dB +3dB 4.I/O ASSIGNING 4ACOMPONENT VIDEO INPUTA : DVDDVD, D-TV/CBL, VCR1, VCR2/DVR, V-AUX B : D-TV/CBLD-TV/CBL, VCR1, VCR2/DVR, V-AUX 4BOPTICAL OUT(1) : MD/CD-RDVD, MD/CD-R, D-TV/CBL, VCR1, VCR2/DVR, V-AUX,

35、PHONO, CD, TUNER 4COPTICAL IN(2) : MD/CD-RMD/CD-R, DVD, D-TV/CBL, VCR1, VCR2/DVR, PHONO, CD, TUNER (3) : DVDMD/CD-R, DVD, VCR1, VCR2/DVR, PHONO, CD, TUNER (4) : D-TV/CBLMD/CD-R, VCR1, VCR2/DVR, PHONO, CD, TUNER 4DCOAXIAL IN(5) : CDMD/CD-R, DVD, D-TV/CBL, VCR1, VCR2/DVR, V-AUX, PHONO, CD, TUNER 5.INP

36、UT MODEDVD : AUTOAUTO/LAST 6.DOLBY DIGITAL SET 6ALFE LEVELSPEAKER : 0dB20dB 0dB 6BDYNAMIC RANGESPEAKER : MAXMAX/STD/MIN 7.DTS SET LFE LEVELSPEAKER : 0dB10dB +10dB 8.SPEAKER DELAY TIMECENTER : 0ms0ms 5ms (1ms step) 9.DISPLAY SETBLUE BACK : AUTOAUTO/OFF OSD SHIFT : 05 +5 DIMMER : 04 0 10.MEMORY GUARDO

37、FFON/OFF qw er tyui!0 !1!2 !3 !4!5!8!90!6!7 o qPOWER (1) P.C.B. wMAIN (6) P.C.B. eMAIN (5) P.C.B. rPOWER (4) P.C.B. (R, T only) tMAIN (7) P.C.B. (B, G only) yMAIN (3) P.C.B. uOPERATION (3) P.C.B. iOPERATION (5) P.C.B. oINPUT (4) P.C.B. !0DSP P.C.B. !1POWER (5) P.C.B. (B, G only) !2OPERATION (9) P.C.

38、B. !3POWER (2) P.C.B. !4POWER (6) P.C.B. (R, T only) !5MAIN (4) P.C.B. !6MAIN (1) P.C.B. !7POWER (3) P.C.B. !8MAIN (2) P.C.B. !9INPUT (1) P.C.B. 0INPUT (2) P.C.B. DSP-AX620 DSP-AX620 6 I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) 1. Removal of Top Cover Remove 8 screws ( q and w

39、 ) and then remove the Top Cover in Fig. 1. 2. Removal of Front Panel Unit a. Remove 9 screws ( e, r and t ) in Fig. 1. b. Remove CB104, CB303 and ground wire. c. Lift 2 hooks and then remove the Front Panel Unit in Fig. 1. Fig. 1 Fig. 2 Fig.3 DSP 3. Removal of Sub Chassis Unit Remove 4 screws ( y )

40、 and then remove the Sub Chassis Unit in Fig. 2. 4. Removal of DSP P.C.B. a. Remove 4 screws ( u ) and then remove the Shield Case Cover in Fig. 3. b. Remove 7 screws ( i and o ) and then remove the DSP P.C.B. in Fig. 3. w w t e r Front Panel Unit Top Cover q q u y y Hooks Sub Chassis Unit u i u i o

41、 Shield Case Cover DSP-AX620 DSP-AX620 7 5. Removal of Input (1)/(2) P.C.B. (Checking the Input (1)/(2) P.C.B. and Replacing Components) a. Remove the DSP P.C.B. b. Remove 1 screw ( !0 ) and then remove the Input (4) P.C.B. in Fig. 4. c. Remove 2 screws ( !1 ) and then remove the Operation (5) P.C.B

42、. in Fig. 4. d. Remove 4 screws ( !2 ) and then remove the Operation (3) P.C.B. in Fig. 4. e. Remove 7 screws ( !3 and !4 ) and then remove the Operation (2) P.C.B. in Fig. 4 and 5. f. Remove 8 screws ( !5 and !6 ) and then remove the Input (1)/(2) P.C.B. in Fig. 4 and 5. g. Place the INPUT (1)/(2)

43、P.C.B. as shown in Fig. 6 and check them for operation. Note : When DSP P.C.B., INPUT (1)/(4) P.C.B., OPE (2)/(3) P.C.B., and OPE (5) P.C.B. have been removed from the rear panel, the ground connection becomes open. Connect the ground of each P.C.B. to the chassis by using a lead wire. Fig. 4 Fig. 5

44、 Fig.6 INPUT (4) INPUT (1) INPUT (2) OPE (2) OPE (5) OPE (3) INPUT (1) INPUT (2) OPE (2) OPE (5) OPE (3) INPUT (4) DSP !3x6!0!1x2!2x4 !5x7 !4 !6 Cloth DSP-AX620 DSP-AX620 8 6. Removal of Main Chassis (Checking the Main (1) P.C.B. and Replacing Components) a. Remove the Front Panel Unit. b. Remove th

45、e Sub Chassis Unit. c. Remove the DSP P.C.B. Fig. 7 Fig.8 Fig.9 d. Remove the Input (4) P.C.B, Operation (5)/(3)/(2) P.C.B. and Input (1)/(2) P.C.B. e. Remove 6 screws ( !7, !8 and !9 ) and then remove the Main (5)/Power (1) P.C.B. in Fig. 7 and 8. f. Remove 4 screws ( 0 ) and then remove the Power

46、Transformer in Fig. 8. g. Remove 4 screws ( 1, 2 and 3 ) and then remove the Main Chassis in Fig. 7 and 8. h. Reinstall the removed P.C.B. to the Rear Panel and tighten them with screws. i.Set the Rear Panel and Front Panel upright as shown in Fig. 9. At this time, use a box or the like to keep them

47、 horizontal. In this state, check the MAIN (1) P.C.B. and each of the other P.C.B. for operation. 3!8 !7 !8 Power Transformer Rear Panel Front Panel MAIN (1) MAIN (5) POWER (1) !9 0 12 Use care so that the DSP Shield Case and INPUT (1)/(2) P.C.B. will not be shorted. DSP-AX620 DSP-AX620 9 I SELF DIAGNOSIS FUNCTION This product has a built-in self diagnosis function (DIAG) to facilitate inspection, measurement and determi