Alpine-Alpage-AL-90-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MAN C 1l 90 /ILPINE . -Contents Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Parts Location and Disassembly Instructions . 4 to 7 Replacement of Mechanical Parts . 8 to 10 Adjustment Proc

2、edures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 to 20 Adjustment Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 to 22 Block Diagram . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 to 24 Trouble Shooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 to 26 Parts Layout on P.C. Board. . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 to 38 Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 to 42 VoltaQe Chart. . . . . . . . . . . . . . . . . . . . . . .

5、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 to 54 Schematic Diagram ( 1/4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to 57 Schematic Diagram (2/4) . . . . . . . . . . . . . . . . . . . . . . .

6、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 to 60 Schematic Diatram (3/4) . 61 to 62 Schematic Diagram (4/4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 to 64 Electrical Parts List . . . . . . . . . . . . . . . .

7、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to 91 Packing Method View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Packing Assembly Parts List . . . . . . . . . . . . . . . . .

8、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Cabinet Assembly Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 to 94 Exploded View (Cabinet) ( 1/2) . . . . . . . . . . . . . . . . . . . . . . . .

9、 . . . . . . . . . . . . . . . . . . . . . . . . . . 95 to 96 Exploded View (Cabinet) (2/2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 to 98 Exploded View (Cassette Deck) . 99 to 100 Cassette Deck Assembly Parts List . 101 Semi-conductor Le

10、ad Identifications . 102 to 107 -2- Specifications Recording System . 4 Track, 2 Channel Stereo Tape Speed . 4.76 cm/sec. 1% Wow and Flutter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.03% (.IIS WRMS) Signal to Noise Ratio (A Curve WTD, Meta

11、l Position, RIP, from 400 Hz 3% Dist. Point) Dolby N R Off . 54 dB Dobly B-Type N R On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 dB Dolby C-Type 11 R On . 64 dB Distortion (400 Hz, 0 dB, Metal Position) STD . 2% BLES . 3% Frequency

12、Response by Reference Tape (-25 dB Level, Dolby NR Off) Metal (TDK AC-711) . 20 Hz to 22 KHz (2 dB) Cr02 (TDKAE-512) . 20Hzto20KHz(2dB) FeCr (SONY CS-300) . 20 Hz to 21 KHz (2 dB) Normal (TDK AC-223) . 20 Hz to 20 KHz 2 dB) Allowable Frequency Response by BLES (-25 dB Level, Dolby NR Off) + 5 OK . 2

13、0 Hz l.:. i dB) to 20 KHz(_ 8 dB) Nearly OK . 20 Hz (!_ i dB) to 17 KHz (,!_ i dB) Bias Frequency . 105 KHz Erase Ratio . 60 dB (125 Hz) Crosstalk. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 dB (1 KHz, 0 dB) Separation . 35 dB (1 KH

14、z, 0 dB) Input Level/Impedance Mic . 0.8mV/600 ohm Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 OOmV /15K ohm EXT NR . 580mV 1.5 dB/50K ohm (400 Hz) Output Level/Impedance Line . 1 OOOmV 1.5 dB/1 OOK ohm Headphone . 500mV/8

15、ohm EXT NR . 580mV 1.5 dB/100K ohm (400 Hz) Fast Forward/Rewind Time (C-60) . 85 sec. Take Up Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 to 609cm Fast Forward/Rewind Torque . , . 70 to 130gcm Power Consumption . 40W Power S

16、ource . 110/127/220/240V, AC 50/60 Hz (Multi Voltage Model) 120V, AC 60 Hz (Single Voltage Model) Memory Back Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SUM-3 Battery 2 pcs. (1.5V x 2) Dimensions . 435(W) x 126(H) x 347(D) mm Weight . 10.1 Kg * * Specificati

17、ons and characteristics are subject to change without prior notice. Noise reduction system manufactured under licence from Dolby Laboratories Licensing Corporation. Dolby and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. -3- AL-90 AL-90 Parts Locations and Disassemb

18、ly Instructions IVIPX Fl LTER ON incdicator DOLBY B/C type NR indicators TAPE SELECT indicators (METAL/Cr02L FeCr/IIORM) MONITOR (SOURCE/TAPE) indicators AUTO PLAY/AUTO REW indicators Multi-memory TAPE/TIME counter E,IECT knob PITCH CONTROL POWER switch PHONES jack . STOP switch ( ) REC switch 1 MET

19、ER 5005,5006 ffi T.P EXT NR ENCODER OUT LINE OUT A F osc AF osc Figure 33 Figure 34 LINE IN SET Figure 35 -19- AC VTVM 0 0 0 AC AC VTVM VTVM AL-90 AL-90 AF osc TP5015(5016l, 5007(5008) i1l1IIIJ TP5011 1-ln= Frequency Counter Oscilloscope 05023 (05024) SET I TP5017 Figure 36 AC VTVM 0 0 0 0 0 Oscillo

20、scope LINE IN _ LINE OUT AC VTVM Oscilloscope r SET 77 -0 _; Distortion Meter (3%) Figure 37 TP2019(2020), 3501(3502) SET SET TP8002 Oscilloscope Figure 38 Figure 39 SET TP8002 SET TP8003 SET TP5001 TP5005 5006) Figure 40 Figure 42 Oscilloscope AC VTVM 0 Figure 41 TP800220-(5) TP8004 PROVE (INTEGRAT

21、OR) DC VTVM TP800I06fi-i:=:=:.I!:fillQJJL=-.J (ADST)._ _ P_R_O_V_E _ ., Figure 43 -20- Adjustment Locations VRI Ci TPioo, . TPI006 . , :; !( TPI002 TPI003 ) - TPI004 ) I , J. f, : Terminal P .C. Board I - , I CBBOOI DtEST osc 0 I N. osc I MUTE-6 l - i - . : :- J VR5517 VR5518 VR5522 VR5502VR5506 VR5

22、521 VR5501 VR5505 VR5520 VR5524 M C F N VR5519 VR5523 VR5503 VR5507 M C F- N VR5504 VR5508 M C F N M C F N . _ l.;TP 7KHz RltHT 15KFTl5KH2-; 1 , 7KHz IKHz IKHz - C _ F N 11.t C F N . I R5512 VR55I6 VR551 I VR55I5 E = -55l0 VR55f4 VR5509 VR5513 f .,j I Record EQ P.C. Board -21- , tt TPl007 . i . I I

23、t . - ., I : TP8005 I - 1I AOIN t : TP8006 Jtl ilf:.:. ADST_ - TP EVCC) 1 I TP50I2 G TP501 I T5005 01) 50 T5006 05023 I, TP!i013 . ., I r : , /, L5008 RIGHT L5004 L5007 VR5010 VR5,0I4 VR5008 t VR5012 TP , () T;5016 ,TlOOB -: 15 TP5007 1 L5003 VR5007 VR501 I VR5009 VR5013 LEFT , VR5006 ,1 () REF I VR

24、5002I ., I . , j L5002 TP5001 TP5004 I I I . , , R8003 , I j , TP5006 I VR5003 Tf5005 R:s9p5 ,1EST - 1 I GAIN 1.: , I I , _ TPB003 TEs?1 ! RBOGO REF_ _ ( ) . ,. VR8004 OFF SET / . It 11 I I i =-TP5003 I 4j I/. VR4801 - =-,;,y.; V _R4803 l -JN - -L2003 lCS)L200I R(S)L2002 , ,. I r : TP2012 =. ; . ()

25、TP4o;: , , -?TPt I l7pJ l7pJ : A s _RENS 4801 o :,r VR2003 vR2004 TP4804 , TP2009J TP2013 VR48b4 liP492 0 L2004 ) ) 1 1 V R4802 TP2020 1 :f.2007 l . tTP2008 R-IN dTP2019 L-DCBAL R-DCBAL TP2010 L5001 0 -: t . . VR2O07 1 . TP20.9I , , , L-GAllll , ! TP2003 d: JP2004 , II VR2001 RI: C82001DiR2002 /JI,!

26、,( fO DUlPj L , ) . fO DUMP I TP2002 S2001 S2002 . vR G2_Ao :-:-= _ -:_ _ _ fO SW_ -=- to SW j :_l = - RIG.HT - ., . c - , . -. . Mother P.,c. Board J -22- R VR3302 D EXT NR VR-33 01 ) ENCODER IN l , I . j / -I . I . r .-. i :,. I. TP:3002 . , . ,P300I , . . . , TP3502 Ii TP3501 I ,) f : / I t I I t

27、 VR3802 EXT NR VR.380I l R D DECODER I L I j t.3502 L350I R VR3502 (7, ; PS GAIN _JJ VR3501 D L Dolby NR P.C. Board IJ (,.) I I ENbENRR(i-00-, IN L J3901 REC EXT NR AMP Etic6 I OUT L J3901 LINE IN L J4001 q MIC JACK JL250 LINE OUT L J4001 1fr LINE LEVEL MIC AMP OUTPUT LEVEL HEADPHONE AMP MIX AMP LIN

28、E AMP HEADPHONE JACK J4101 l INTEGRATOR EXT NR DECODER -,)9 AID CONVERTOR SWITCHING IN L J3902 EXTNR PB EXT NR AMP INTEGRATOFI BUFFER SIGNAL RECTIFIER DECODER (a.) II I r=.:.:-1 I - I .,.,. I 1.:c.:-_ _J VARIABLE REC EQ RCH TEST OSC BIAS CONTROL REC BIAS osc MUTE .,. _ -, CONTROL TEST osc COMPARATOR

29、 TEST SIGNAL TEST OSC FREQ. SWITCHING INTER FACE AUTO REC EQ CONTROL SELECT SW- AID BUFFER AMP REC HEAD L HD2001 BLES STD/CALL WRITE KEV SW STD MEM INDICATOR HINDICATOR I ERR BAT DRIVER BIAS CAL ._ _ _.OK EQ ERASE BIAS osc ERASE BIAS CONTROL PB EQ AMP ERASE HEAD HD5001 AUlO REW/ PLAY SWITCH DECK CON

30、TROL HEAD BASE POSITION DETECT SW REC INH. PACK DETECT SW KEY RO R3 REW.PLY. EX CPL,-., WCTRO. RESET FL COUNTER t-,.i DRIVER EXECUTION PULSE MUTING TIMER SWITCH COUNTER TAPE/TIME EXC SW LED DRIVER FL COUNTER 50/60Hz SW CALL,WRITE CLEAR SW SWITCHING - REEL MOTOR M2 ASSIST MOTOR M3 VCC +B CD - 0 () C

31、- m cc I m 3 AL-90 Trouble Shooting Guide When the tape deck fails to function properly, check follow- ing conditions first, then examine it according to the check list below. 1. Are all connections correct? 2. Is this unit properly used as instructed in the manual? 3. Is there any trouble on speake

32、rs and amplifiers? Symptom Causes Remedy Tape does not run. No power supplied. Check AC supply cord and POWER switch. Cassette door is not properly closed . Push EJECT knob to check cassette load- ing and close the cassette door again. PAUSE switch was touched and the Release the pause mode . deck i

33、s in pause mode. Tape end is reached. Rewind the tape or turn the cassette over. During rewind, the tape MEMORY EXECUTION switch is ON. Set MEMORY EXECUTION switch to stops or goes into play-OFF. back. Recording is not Tabs for prevention of accidental erasure Cover the tab openings with a piece pos

34、sible. have been removed. of adhesive tape. Connections are improper. Check connections . Heads are dirty. Perform head cleaning . No playback sound. Although no external N R unit is being us- Set the switch to correct position. ed, DOLBY NR select switch is set to EXT NR. During playback, MONITOR s

35、witch is Set MONITOR switch to TAPE. set to SOURCE. OUTPUT LEVEL control is set to Adjust for proper level. minimum. During recording and pause mode, Set MONITOR switch to SOURCE. MONITOR switch is set to TAPE. Recording or piayback Ti MER switch is not set to OFF . e Set TIMER switch to OFF. operat

36、ion starts auto- matically when power is switched on. Input signal does not REC LEVEL controls are set to minimum. Adjust for proper level. come in the deck when Connections between AL-90 and stereo Check connections and cords . recording. system are incorrect. Playback sound is husky Heads are dirt

37、y. Perform head cleaning . or left/right sound bal- Tape is stretched or warped. Use another tape . ance is instable. Excessive tape hiss. Heads are magnetized. Perform head demagnetizing . Inferior tape with high hiss noise is used. Replace the tape . Heads are dirty. Perform head cleaning . Settin

38、g of DOLBY NR select switch Set the switch to a correct position. is unsuitable. Recording level is too low. Adjust for proper level. MIC level controls are not set to minimum Set MIC level controls to minimum . in recording from LINE IN. -25- AL-90 Symptom Causes Remedy Sound is distorted. Recorded

39、 sound on the tape itself is Check by listening to another tape. distorted. Recording level is too high . Adjust for proper level. TAPE SELECT switch is not set to Set TAPE SELECT switch to correct correct position in recording. position. Wow/flutter is excessive Heads, pinch rollers and capstans ar

40、e dirty . Perform cleaning of heads and tape and sound is intermittent. ! transport part. Tape is wound too tightly or unevenly . Wind the tape with fast forward or rewind. Loud hum noise is heard Connection cords are not plugged in Securely plug in all cords. during playback. correctly. External le

41、akage flux (in inductive fields Remove inductive sources such as from amplifier power transformer, etc.) fluorescent lamps, amplifiers, transformers, occurs. etc. from the vicinity of the deck. Heads are dirty Perform head cleaning . High tone is excessively N R system is not engaged properly . The same NR system as was used in re- enhaned. ding must be employed for playback. TAPE SELECT switch is set incorrectly . Set TAPE SELECT switch to suitable position. High tone is weak. Heads are dirty. Perform head cleaning . TAPE SELECT switch is set incorrectly . Set