Alpine-Alpage-AL-65-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL /ILPINE CJ ,-. , l,;u.i:;r H1W flOlU i1,.fi,Jfl/l,l,JR,t, H,t,J(, ,-),1,H(. LINE INPUT jacks LINE UTPUT jacks (J201) (J401) Figure 2 -3- 11111111111111111 . ,t,.PlfQR IJ:t!rJfH (Jf-MN, L_J Voltage selector switch (For Multi-voltage Model only) (S101) AC supply cord (P101) - 1. Removal

2、 of Top Cover (1) Remove four screws marked o as shown in Figure 3 and 4. (2) Lift up the top cover in the direction of the arrow in Figure 3. 2. Removal of Front Panel (1) After removal of top cover, remove one screw marked # as shown in Figure 5. (2) Remove two connectors as shown in Figure 5. (3)

3、 Remove seven screws marked 6 as shown in Figure 5 and 6. (4) Remove the front panel from the main chassis in the direction of the arrow as shown in Figure 3. 3. Removal of Meter Optical (1) After removal of top cover and front panel, re- move three screws marked 00 as shown in Figure 5. (2) Then re

4、move meter optical with the Lamp P.C. Board. (3) Disconnect all wires from the meter optical and Lamp P.C. Board. II * It Board tt Lamp P.C. Board Met r Optical Control P .C. Board Deck Direction of Front Panel Removal Rear Cover Figure 5 -4- Direction of Top Cover Removal Figure 3 Figure 4 4. Remov

5、al of REC. VR (1) After removal of front panel, remove four screws marked * as shown in Figure 7. (2) Disconnect all wires from the REC. VR. 5. Removal of Rear Cover (1) After removal of top cover, remove eight screws marked as shown in Figure 4. (2) Removal two tacks as shown in Figure 4. 6. Remova

6、l of Master Board P.C. Board (1) After removal of top cover, rear cover and front panel, remove ten screws marked from the master board P.C. Board as shown in Figure 5 and 7. (2) Remove bias fine knob as shown in Figure 7. (3) Remove two tacks as shown in Figure 5. (4) Then remove master board P.C.

7、Board with the control P.C. Board. (5) Disconnect all wires from the master board P.C. Board and control P.C. Board. (6) Their P.C. Board can be completely removed from the chassis. 7. Removal of Key Board P.C. Board (1) Remove seven screws marked as shown in Figure 8. (2) Disconnect all wires from

8、the key Board P.C. Board. 8. Removal of Reed Switch P.C. Board (1) Remove one screw marked V as shown in Figure 5. (2) Disconnect all wires from the reed switch P.C. Board. 9. Removal of L.E.D. P.C. Board (1) Remove one screw marked * as shown in Figure 5. (2) Disconnect all wires from the L.E.D. P.

9、C. Board. 10. Removal of Cassette Deck (1) Lift up the cassette door in the direction of the arrow in Figure 7. (2) Remove four screws marked z as shown in Figure 5. (3) Disconnect all wires from the cassette deck. (4) The cassette deck can be completely removed from the chassis. -5- I Direction of

10、Cassette Door Key Board P.C. Board - Figure 6 Figure 7 Figure 8 Replacement of Mechanical Parts Removal of Cassette Deck Prior to Replacement Procedures, remove the cassette deck assembly according to Removal of Cassette Deck on page 5. Replacement of Head ( 1) Remove two screws marked * from the ca

11、ssette door bracket of the cassette deck as shown in Figure 9 and the cassette door can be removed. (2) Remove four screws marked o and wires from both sides of the R/P head A , as shown in Figure 10, and it can be removed, with head P.C. Board. Remove the head from the P.C. Board with a soldering i

12、ron. Remove two screws marked and wires from both sides of the erase head as shown in Fig- ure 10, and it can be removed. (3) After finishing assembling, adjust head azimuth, height and tilt angle. Apply screw-lock after adjustment. Replacement of Belt and Flywheel ( 1 ) Remove a screw marked and th

13、e motor brack- et, and two belts can be removed as shown in Figure 11. (2) Remove a washer marked 6. as shown in Figure 13 and the flywheel can be removed. (3) After replacing the belt and flywheel, clean them with absolute alcohol. (4) After finishing assembling, confirm tape speed and wow/flutter

14、with test tape (MTT-111 ). Motor Bracket Flywheel Main Belt Sub Belt D Figure 11 -6- Cassette Door Bracket Erase Head * Figure 9 R/P Head BLK Figure 10 Replacement of Motor (1) Remove a screw marked as shown in Figure 11 and two screws marked * and two wires (white, white/red) from terminal P.C. Boa

15、rd as shown in Figure 12, and the motor can be removed. (2) After finishing assembling, confirm tape speed and wow/flutter with test tape (MTT-111 ). Replacement of Pinch Roller (1) Remove a washer marked to take off pinch roller assembly from the cassette deck as shown in Figure 13. (2) After repla

16、cing the pinch roller, clean it with abso- lute alcohol. (3) After finishing assembling, confirm tape speed and wow/flutter with test tape (MTT-111 ). -7- . White Figure 12 4 Washer / ._/ / , I Pinch Roller I Figure 13 - Trouble Shooting Guide Symptom Possible Cause No power. 1. Defective power swit

17、ch (S101). 2. Disconnected Fuse (F101 v 103). (For multi-voltage model only). 3. Defective DC supply block. 4. Defective power connections. Capstan shaft does not rotate. 1. Main belt out of place or its discon- Head base does not go up. nection. 2. Defective motor. 3. Burning of flywheel shaft. 1.

18、Defective play solenoid (SD601 ). 2. Defective control circuit. 3. Deformation of spring plate. 4. Deformation of assist base stopper. More than 90 87 to 90 -8- Remedies 1. Replace switch. 2. Replace fuse. 3. Check and repair DC power. 4. Check and repair wiring. 1. Reinstall or replace main belt. 2

19、. Replace motor. 3. Lubricate or replace flywheel shaft. 1. Replace play solenoid. 2. Check and repair. 3. Modify spring plate. Solenoid 4. Modify the angle of bending part of assist base stopper. / Assist Base Symptom Cassette tape does not run. (No taking up operation). FF/REW does not funciton. E

20、xcessive wow/flutter. Playback does not function. Possible Cuase 1. Sub belt out of place or its discon- nection. 2. Slippage of play idler. 3. Defective take-up reel. - Remedies 1. Reinstall or replace sub belt. 2. Clean play idler. 3. Replace take-up reel. Play Idler 1. Defective FF (SD603)/REW (S

21、D602) 1. Replace them. solenoids. 2. Defective control circuit. 2. Check and repair. 1. Defective flywheel assembly. 1. Replace flywheel assembly. 2. Defective motor. 2. Replace motor. 3. Defective drive belt. 3. Replace drive .belt. 4. Defective pinch roller assembly. 4. Replace pinch roller assemb

22、ly. 5. Slippage between tape and pinch roller. 5. Clean pinch roller. 6. Swing of center clutch. 6. Replace center clutch. 7. Swing of back tension. 7. Modify back tension spring and ap- ply grease on the spring plate. Apply grease here Spring plate as 1. Dirty recording/playback head. 1. Clean head

23、. 2. Defective recording/playback head. 2. Replace head. 3. Disconnected wire between recording/ 3. Check wiring and repair. playback head and playback amplifier. 4. Defective playback level adjustment 4. Readjust or replace volumes. volumes (VR201, 202) or their slippage. 5. Defective playback ampl

24、ifier. 5. Repair or replace. 6. Defective Dolby circuit. 6. Repair or replace. 7. Defective muting cirucit. 7. Repair or replace. 8. Dfective contact of line-out 8. Repair or replace. jack of its defect. -9- - Symptom Possible Cause Remedies Erasing does not function. 1. Defective rec. inh. switch (

25、S602). 1. Replace switch. (No signal input) 2. Removal of safety tabs of cassette 2. Fix tabs. tape. 3. Dirty erase head. 3. Clean head. 4. Defective erase head. 4. Replace head. 5. Wire disconnection to erase head. 5. Check wiring and repair. 6. Defective bias OSC. 6. Check and repair. 7. Defective

26、 bias OSC trans. 7. Replace trans. Recording does not function. 1. Defective contact of line-in 1. Repair or replace. jack or its defect. 2. Defective contact of mic jack or 2. Repair or replace. its defect and defect of mic amplifier. 3. Defective rec volume (VR251, 252). 3. Replace volume. , 4. De

27、fective Dolby circuit. 4. Repair or replace. 5. Slippage of rec. current adjusting 5. Readjust or replace. volumes (VR501, 502) or their defect. 6. Defective rec. amplifier. 6. Repair or replace. 7. Slippage of rec. bias adjusting 7. Repair or replace. volumes (VR503 - 508) or their defect. 8. Disco

28、nnected wire between 8. Check wiring and repair. recording/playback head and record amplifier. 9. Dirty recording/playback head. 9. Clean head. 10. Defective recording/playback head. 10. Replace head. Distorted Sound. 1. Distortion of input signal. 1. Check input signal. 2. Level-over of input signa

29、l. 2. Lower input level. 3. Bias is too small or not flowing. 3. Adjust to suitable bias. 4. Misposition of rec. bias adjusting 4. Adjust to suitable bias. volume (VR503 - 508). 5. Large distortion of bias waveforms. 5. Check bias OSC. 6. Magnetization of recording/ 6. Demagnetize with head eraser.

30、playback head. 7. Dirty recording/playback head. 7. Clean head. -10- MIC AMP J251 SOURSE AMP MPX FILTER J201 J252 v-O PB. AMP - HDl-1 L P.8. HEAD REED SW +B AUTO PLAY AUTO REW AUTO REPEAT SW AUTO STOP SWITHING TAPE END DETECT REC MUTE +8 P.B. FF REW SOLENOID DOLBY NR +B NORM EQ CrO2 EQ - - METAL EQ

31、REC AMP PHONE AMP REC HEAD HDl-3 ERASE HEAD HD2 J403 -!el) J401-I STOP SWITCHING POWER ON/OFF MUTE MUTE +B MUTE +B SWITCHING P.B. FF METER AMP REC +B REC +B SWITCHING REC PB. SOLENOID DRIVER R DECK CONTROLLER FUNCTION KEYS REMOTE DIN JACK LM402 P.8. MUTE +B +B P.8. MUTE+B SWITCHING POWER SUPPLY CIRC

32、UIT M601 OJ - 0 () C - Q) cc -,: Q) 3 I . Adjustment Procedures Step Description Mode Adjust Test Connection Remarks Points Points Instruction Round Playback hole on Line Test Tape: MTT-111 (3 kHz) 1 Tape Speed Tape: Nor the rear of Figure 16 Adjustment NR: Off the motor Out Adjust for 3000 30 Hz (F

33、igure 15) Head Height and Turn the screw A and B to adjust the head height and tilt angle. (Figure 14) 2 Tilt Angle Ad-Use M-300 check bar to check the head height. The tip face of the check bar should stay justment parallel to the head surface to cheak the tilt angle. (See Note (11) Turn the screw

34、until the left and right Playback Head signal levels become maximum and Head Azimuth Azimuth Line still more with the phase when repro- 3 Adjustment Tape: Nor Screw C Out Figure 16 ducing MTT-114 (10 kHz) (It is neces- NR: Off (Figure 14) sary to readjust the head height as it moves if azimuth adjus

35、tment is too large.) Playback Playback Level Tape: Nor VR201 T.P.3 Test Tape: MTT-150 4 Adjustment NR: Off VR202 T.P.4 Figure 17 Adjsut for 580mV Monitor : Tape Test Signal Input: 23 kHz, non cliping C201 T.P.3 Level Select capacitance of C201 for 1 C202 T.P.4 Figure 18 23 kHz at the peak point. 23

36、kHz: Decrease the capacitance Playback Playback Tape: Nor R241 Select resistor at the peak point to 5 Adjustment NR: Off T.P.3 5 6 dB from bottom of EQ curve (Refer to Monitor 2 R203 Figure 18 and connect it with dipping solder. Figure 20) : Tape ( R242 T.P.4 6 dB: Decrease the resistance Change tap

37、e position to CrO2 3 Figure 18 position. Confilm -3.5 dB from normal level at the level point of 14 kHz Rec/Pause Rec. Level Tape: Nor VR251 T.P.1 Figure 19 Test signal input: 400 Hz, 300mV 6 Adjustment NR: Off VR252 T.P.2 Adjust for 580mV Monitor : Source Bias: Off (See Note 1 l l -12- . Step Descr

38、iption Mode Adjust Test Connection Points Points Instruction Remarks Rec/Pause Tape: Nor Level 7 Level Meter NR:Off VR403 Conditions at step 6 Adjustment Monitor VR404 Meter Figure 1 9 Adjust for O dB : Source Reading ( Mark) Bias: Off Rec/Pause Tape: Nor 8 Rec. Peak NR: Off L501 T.P.5 Test Signal I

39、nput: 23 kHz, 17mV Adjustment Monitor L502 T.P.6 Figure 19 (300mV -25 dB) : Source Adjust for peak point come to 23 kHz Bias: Off I Rec/Play Tape VR501 T.P.5 1 : Nor Figure 19 Test Signal Input: 400 Hz, 300mV NR: Off VR502 T.P.6 Adjust for 1 mV Bias: Off Rec/Play Tape VR503 T.P.5 9 Rec. Current 2 :

40、CrO2 Figure 19 Adjustment NR: Off VR504 T.P.6 Adjust for 1.3mV Bias: Off Rec/Play Tape VR505 T.P.5 3 : Metal VR506 Figure 19 Adjust for 1.3mV NR: Off T.P.6 Bias: Off Rec/Play 1 Tape VR507 T.P.5 Figure 19 Test Signal Input: 400 Hz, 300mV : Nor VR508 T.P.6 Adjust for 6mV (14mV - 7.5 dB) NR: Off Rec/Pl

41、ay 2 Tape VR551 T.P.5 Figure 19 : CrO2 T.P.6 Adjust for 8mV (14mV -4.5 dB) Record/Play NR: Off (1) Bias Adjustment Rec/Play 3 Tape VR509 T.P.5 Figure 19 : Metal VR510 T.P.6 Adjust for 14mV NR: Off Rec/Play 4 Tape L503 T.P.5 Figure 19 : Metal L504 T.P.6 Adjust for max. and repeat Step (3). NR: Off 10

42、 Rec/Play VR507 T.P.5 NR: Off Figure 19 20 Tape: Nor VR508 T.P.6 17000 Hz Test Signal In- Record/Play Rec/Play put: Frequency (2) Frequency T.P.5 Frequen-Response Band Response NR: Off VR551 Figure 19 cy Re- 20 17mV (300mV Tape: CrO2 T.P.6 18000 Hz Adjustment sponse -25 dB) Rec/Play ( 3dB) Adjust fo

43、r flat NR: Off VR509 T.P.5 Figure 19 20 of Response Tape: Metal VR510 T.P.6 19000 Hz -13- Mode Adjust Test Connection Remarks Step Description Points Points Instruction When the frequency response becomes up or down because of unevenness of the head or tape running, readjust fol- lowing instruction.

44、 Refer to Figure 21, 23. 1. Up or down less than 10 kHz. CrO2 . . VR503, 504 EQ Volume 10 Readjust by VR505, 506 (Metal). Nor . VR501, 502 2. Up or down about 14 kHz. Refer to Figure 22, 23. CrO2 . VR551 Bias Volume Readjust by VR509, 510 (Metal) Nor . VR507, 508 Rec/Play Bias Trap Tape: Metal T.P.3

45、 Figure 19 Test Signal Input: 400 Hz, 17mV Adjustment NR T.P.4 (300mV -25 dB) : C position 11 L201 (1) Pre Amp L202 Adjust for min. output (2) Dolby L203 Adjust for min. output L204 Note I) : Bias: Off Remove A connector from the master P.C. Board to the erase head. Alignment Location D B Figure 14

46、Figure 15 -14- Ill Connection Instruction LINE OUT 1-+-i D 1-1-ook-+-i-o 111111111111111111!1! PLAY Unit ohm AC VTVM T.P.3,4 PLAYPACK Unit AC VTVM Figure 17 LINE IN Signal Generator Unit Frequency Response Playback EQ Frequency Response. I !ss-GdB i 23 kHz Frequency -11-fTJ Figure 16 T.P.7,8 Signal

47、Generator T.P.1,2/T.P.3,4/T.P.5,6 AC VTVM Figure 19 Fregueny Countor T.P.3,4 N 00 NN a: a: Figure 18 AC VTVM 1:pl o Distortion Meter When changing under 10 kHz, adjust the EQ volume. 10 kHz -Frequency Figure 20 Figure 21 When changing around 14 kHz, adjust the bias volume. =i!I /- . 14 kHz -Frequency Figure 22 Examples: R/P Frequency Response -Frequency . Flattens with EQ volume. . Flattens with bias volume. . Check the peak point of playback and recording. Figure 23 -15- - Note II Initial Setup 1. Place the gauge plate in a tape transport just as a cassette tape is normally inserted.