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1、SERVICE MAN,/. ALPINE -Contents- Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Parts Locations and Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2、. . . . . . . 4 to 7 Adjustment Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 to 16 Adjustment Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3、to 18 Block !)iagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 to 20 Replacement of Mechanical Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 to 23 Trouble S
4、hooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 to 34 Parts Layout on P.C. Boards . . . . . . . . 35 to 47 Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5、. . . . . . . . . . . 48 to 50 Schematic Diagram 1/3-A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 to 52 Schematic Diagram (1 /3-B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6、 . 53 to 54 Schematic Diagram 2/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to 56 Schematic Diagram (3/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 to 58 Electri
7、cal Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 to 78 Exploded View (Cabinet) (1/2) . . . 79 to 80 Exploded View (Cabinet) (2/2) . . . . . . . . . . . 81 to 82 Cabinet Assembly Parts List . . . . . . . . . . . . .
8、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 to 84 Exploded View (Cassette Deck) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 to 86 Cassette Deck Assembly Parts List . . . . . . . . . . . . . . . . . . . .
9、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Packing Assembly Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Semi-Conductor Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . .
10、. . . . . . . . . . . . . . . . . . . 89 to 93 - 2 - l J Specifications Recording System . . 4 Track, 2 Channel Stereo Tape Speed . _ . , . . . . . 4.76 cm/sec. 1% Wow and Flutter . , . . , . 0.03% (J IS WRMS) Signal to Noise Ratio (A Curve WTD, Metal Position, R/P, from 400 Hz 3% Dist. Point) Dolby
11、 NR Off . . , . , . . . . . 54 dB Dolby B-Type NR On . , . . 59 dB Dolby C-Type NR On . . . 64 dB Distortion (400 Hz, 0 dB, Metal Position) . . . . 2% Frequency Response by Reference Tape (-25 dB Level, Dolby NR Off) Metal (TDK AC-711) . . . , . 20 Hz to 21 KHz (3 dB) Cr01 (TDK AE-512) . . 20 Hz to
12、20 KHz (3 dB) Fe Cr (SONY CS-300) . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Hz to 20 KHz (3 dB) Norma I (TDK AC-223) . . . . . . . . . . . . . . 20 Hz to 20 KHz 3 dB) Bias Frequency . 105 KHz Erase Ratio . . . 60 dB ( 125 Hz) Crosstalk . . . . . . . 60 dB (1 KHz, 0 d
13、B) Separation . . . . 35 dB (1 KHz, 0 dB) Input Level/Impedance Mic . . . . . . . . . . . O.BmV/600 ohm Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 OOmV /1 SK ohm Output Level/Impedance Line . . . . . . 1000mV 1.5 d8/100K o
14、hm Headphone . . . 500mV/8 ohm Fast Forward/Rewind Time IC60) . 85 sec. Take Up Torque . . . 35 to 60 gem Fast Forward/Rewind Torque . , . , , . . . 70 to l 30gcm Power Consumption . . . . . . 40W Power Source . . . 110/127 /220/240V, AC 50/60 Hz (For Multi-Voltage Model) 120V, AC 60 Hz (For Single-
15、Voltage Model) Dimensions . , . . . . . . . . . . 435W) x 126(H) x 347(0) mm Weight . . . . . 9.5 Kg Specifications and characteristics are subject to change without prior notice. . Noise reduction system manufactured under I icence from Dolby Laboratories Licensing Corporation. Dolby and the double
16、O symbol are trademarks of Dolby Laboratories Licensing Corporation. -3- - Parts Locations and Disassembly Instructions TAPE/TIME switch _ -, C LEAR switch _ _, MEMORY EXECUTION _ _, switch ir ffi /TP21032104 AC VTVM T.P. 3001,3002 LEVEL METER m)_ 515,516 - AF OSC LINE IN I 7 AF OSC - Figure 21 LINE
17、 IN SET / - T.P. - - V m- Figure 22 AC VTVM Figure 23 -15- - I -0 0 - 0 - AC VTVM . AL-85 Frequency Counter AF OSC Figure 24 DC Volt Meter 0553 , 0554 (QS55 ). (0556 ) 0 O 0 =-_J TP505, 506 Oscilloscope Figure 25 AC VTVM AC VTVM 0 0 ,_JIL, 0 0 0 Oscilloscope LINE OUT AC VTVM Oscilloscope LINEIN r- m
18、 SET 11 AF OSC 100K ohm Figure 26 TP2105(TP2106). TP3101 (3102) LINE IN r _ SET :1 -v -I rlr AF OSC Figure 27 -16 - Distortion Meter (3%) - 0 0 0 0 0 Oscilloscope Adjustment Locations Terminal (Deck) P.C.Board fmrm= a3.t-:1t1-t . (3%) J-, REEL MOTOR DRIVER ASSIST MOTOR DRIVER REEL 1 livlOTOR SWITCHI
19、NG vcc+e -19 - AL-85 I AL-85 METER AMP REC EO VARIABLE AMP METER DRIVER PEAK/VU METER L LM401 DOLBY REC LEVEL/EO LOW BOOST REC EO AMP IK/7K REC EO AMP 15K REC HEAD L HD501-I TEST osc TEST OSC SWITCHING 24V RESET PWR FAIL/HLTIRESET SIGNAL CONTROL TO VALIOUS P.B MUTE MUTE Cl RCUIT ,_REC MUTE MUTE CONT
20、ROL POWER PAMO RAMO REC rl REC BIAS BIAS I BIAS I 1 1 CONTROL osc CONTROL SWITCHING I L.j ERASE t BIAS CONTROL , ERASE SIAS osc ERASE HEAD H0502 REC +B DOLBY DECK CONTROL PB EO AMP r= HEAD BASE POSITION DETECT SW PB HEAD H0201-I AUTO REW/PLAY SWITCH TIMER t l SWITCH I REC INH I I r COUNTER ACK DETEC
21、T SW MATRIX TAPE /TIME KEY RO-R:3 REW.PLY.EX.CPL WCTRO LED ORI VER I I LED J EXC SW PWR MUTE ._ _ _ RESET , FL COUNTER DRIVER I FL COUNTER I 50/60Hz SW I REMOTE OINJACK FUN CT ION KEY SW EXECUTION PULSE MUTING t -20 - CALL. WRITE CLEAR SW q i; Replacement of Mechanical Parts 1. Replacement of Casset
22、te Deck Assembly ( 1) Remove the cassette deck assembly according to the item Parts Locations and Instructions. (2) After replacing the cassette deck assembly with a new one, assemble the unit in the reverse way to disassembly. 2. Replacement of Record/Playback and Erase Heads ( 1) Remove the cassen
23、e deck assembly according to the item Parts Locations and Instructions. (2) For removal of the record/playback head, remove two screws (A) and disconnect the lead wires from the head P.C. Board as shown in Figure 28. Then remove the record/playback head from the P.C. Board using a soldering iron. Fo
24、r removal of the erase head, remove the screw (B) and disconnect the lead wires from the head to t.;ke it off as shown in Figure 28. (3) After replacing the head(s) with .; new one and installing the head in the reverse way to disas- sembly, adjust head azimuth, height and tilt angle. ( 4) Apply a l
25、ock paint on the screws (A, Bl after mechanical adjustment and readjust electrical adjustment according to Adjustment Proce- dures. 3. Replacement of Reel Belt(sl ( 1) A emove the cassette deck assembly. (2) Remove two screws ( ) to take off the dust cover assembly from the cassette deck as shown in
26、 Figure 29. (3) After replacing the reel belt with a new one, clean it with absolu le alcohol and install it in the reverse way to the disassembly. (4) After assembling, confirm tape speed and wow/ fluuer are suitable according to Adjustment Procedures. 4. Replacement of Pinch Roller Assembly (S) (
27、1) Remove the cassette deck assembly. (2) A emove the E ring to take off the pinch roller assembly (S) as shown in Figure 30. (3) After replacing the pinch roller assembly (S) with a new one, clean it with absolute alcohol and as- semble it in the reverse way to the disassembly. (4) After assembling
28、, confirm tape speed and wow/ flutter are suitable according 10 Adjustment Procedures. Erase Head ,s Oust Cover Assembly -21- B Record/Playback Head A A Head P.C. Board VIO RED Figure 28 Figure 29 Figure 30 WHT Pinch Roller Assembly (S) - f i 5 AL-85 5. Replacement of Pinch Roller Assembly (T) ( 1)
29、Remove the cassette deck assembly and then the dust cover assembly. (2) Remove the pull spring and the E ring to take off the pinch roller assembly as shown in Figure 31 . (3) After replacing the pinch roller assembly ( T) with a new one, clean it with absolute alcohol and assemble it in the reverse
30、 way to the disas- sembly. (4) After assembling, confirm tape speed and wow/ flutter are suitable according to Adjustment Procedures. 6. Replacement of Pad Motor Assembly (1) Remove the cassette deck assembly. (2) Remove two screws ( ) as shown in Figures 32 and 34 . (3) Pull out the cam gear, and r
31、emove two screws ( * ) as shown in Figure 33, and two lead wires (violet, orange) from the terminal P .C. Board to take off the pad motor. (4) After replacing the pad motor assembly with a new one, assemble it in the reverse way 10 dis- assembly, Pad Bracket Assembly c) ?ad Motor Figure 33 Cam Gear
32、0 1rection of Cam Gear Removal * -22 - -E Ring _.,_ _ Pinch Roller Figure 31 Reel Belt Figure 32 Pad Motor Assembly Figure 34 Assembly (T) Pad Bracket Assembly 7. Replacement of Reel Motor Assembly ( 1) Remove the cassette deck assembly and then the dust cover assembly. (2) Remove four screws ( * )
33、to take off the DD motor unit assembly from the cassette deck assembly as shown in Figure 32. (3) Remove five screws ( ) from the cassette deck assembly as shown in Figure 35. (4) Remove two screws ( ) from the motor bracket as shown in Figure 36 and two lead wires (red, blue) from the terminal P.C.
34、 Board. (5) After replacing the reel motor assembly with a new one, assemble it in the reverse way to dis- assembly. (6) After assembling, confirm tape speed and wow/ flutter are suitable according to Adjustment Procedures. -23- Req - Reel Motor Assembly Motor Bracket Figure 35 Reel Motor Assembly F
35、igure 36 - , ) 1 AL-85 Trouble Shooting Guide When the tape deck fails to function properly, check following conditions first, then examine it according to the check list below. 2. Is this unit properly used as instructed in the manu- al? 3. Is there any trouble on speakers and amplifiers7 1. Are al
36、l connections correct? 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 loading and close the cassette door again. PAUSE switch was touched and the Release the pause mode . deck
37、is 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 possible. Tabs for prevention of accidental Cover the tab openings with a piece
38、of erasure have been removed. adhesive tape. Connections are improper. Check connections . Heads are dirty. Perform head cleaning . No playback sound. During playback, MONITOR switch is Set MONITOR switch to TAPE . set to SOURCE. OUTPUT LEVEL control is set to Adjust for proper level. minimum. Durin
39、g recording and pause mode, Set MONITOR switch to SOURCE . MONITOR switch is set to TAPE. Recording or playback TIMER switch is not set to OFF. Set TIMER switch to OFF. operation starts auto maticatly when power is switched on. Input signal does not REC LEVEL controls are set to mini- Adjust for pro
40、per level. come in the deck when mum. recording. Connections between A L-85 and stereo Check connections and cords. system are incorrect. Playback sound is husky Heads are dirty. Perform head cleaning. or left/right sound bal Tape is stretched or warped. Use another tape . ance is instable. Excessiv
41、e 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 . Setting of DOLBY N R select switch is Set the switch to a correct position . unsuitable. Recording level is too low. Adjust for prop
42、er level. MIC level controls are not set to mini- Set MIC level controls to minimum . mum in recording from LINE IN. -24 - Ill Symptom Causes Remedy Sound is distorted. Recorded sound on 1he tape itself is Check by listening to another tape. distorted. Recording level is too high. Adjust for proper
43、level. TAPE SELECT switch is not set to cor- Set TAPE SELECT swtich to correct rect position in recording. position. Wow/flutter is excessive Heads, pinch rollers and capstans are Perform cleaning of heads and tape and sound intermittent. dirty. transport part. Tape is wound too tightly or unevenly.
44、 Wind the tape with fast forward or rewind. Loud hum noise is heard Connection cords are not plugged in Securely plug in al I cords. during playback . correctly. External leakage flux (in inductive fields Remove inductive sources such as fluo- from amplifier power transformer, etc.) rescent lamps, amplifiers, transformers, occurs. etc. from the vicinity of the deck. Heads are dirty. Perform he
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