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1、iiii . SERVICE MANUAL r.llpage STEAEO G4SSETTE DECK -REVISED- 300 This Service Manual is applicable to manufactures Serial Numbers after 10710001. Qlpaoa STlR(O CASSEHf TAPt DCK A(:JO() cx;r. . Ulll(ll. . I . 11119 ALPINE ELECTRONICS INC. I Contents Specifications . . . . . . . 2 Parts Location and
2、Disassembly Instructions . 3 to 5 Adjustment Procedures . . . . . . . . . . . . . . . 6 to 10 Adjustment Locations . . . . . . . . . . . . . . 11 Replacement of Mechanical Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Trouble Shoot
3、ing Guide . : . 13 to 15 Block Diagram . 16 Parts Layout on P .C. Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 to 28 Wiring Diagram (1/2) . . 29 to 30 Wiring Diagram (2/2) (For Multi Voltage Model). . . . . . . . . . . . . . . . .
4、. . . . . . . . . . . . . . . . . . . . . . 31 to 32 Wiring Diagram (2/2) (For Single Voltage Model) . 33 to 34 Schematic Diagram ( 1 /2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 to 36 Schematic Diagram (1/2) Voltage Chart . 37 Sc
5、hematic Diagram (2/2) Voltage Chart . 38 to 42 Schematic Diagram (2/2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 to 44 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6、. . . . . . . . . . . . . 45 to 61 Packing Assembly Parts List . : . 62 Packing Method View . : . 62 Exploded View (Cabinet) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 to 64 Cabinet Assembly Parts List . . . . . . . . . . . . . . .
7、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to 66 Exploded View (Cassette Deck) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 to 68 Cassette Deck Assembly Parts List . . . . . . . . . . . . . . . . . . . . . .
8、. . . . . . . . . . . . . . . . . . . . . . . . . . 69 to 70 Semi-Conductor Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 to 72 Specifications Type . 4-track, 2 channel stereo cassette deck, front loading:yertical type Power Sourc
9、e . AC 110/127/220/240V, 50/60 Hz (For multi-1idhage model) AC120V, 60 Hz (For single voltage model) Power Consumption . 40W Max. Tape Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4. 76 cm/sec. 1 .5% Wow v1EMORY Switch . :,i _ -. .
10、;-.:-z J 8 . rn:_ u 1. r.,1- ?:! 11, - .,tA=;:_.- - POW El Bottoo i =-_: . :,_,. _ wl - j II -fn a:i, ij Function Switches: DOLBY CAL STOP, REC (),REW ( ) (UR) Controls PLAY (),FF (),PAUSE ( 11) TEST OSC (400 Hz/10 kHz) TAPE SELECT Switch - Switch DOLBY NR/MPX FILTER Switch-REC LEVEL (Master) Contro
11、l REC MUTE Switch _ _. BIAS FINE (UR) Controls MONITOR (TAPE/SOURCE) Switch- MIC REC LEVEL (L/R) Controls PHONES Jack- TIMER (PLAY-OFF-REC) Standby Switch METER (PEAK/VU) Switch- -, 1UTPUT LEVEL/PHONES LEVEL ) REC Monitor Jack J (For multi-voltage model) REC/PLAY (DIN) Jack (For multi-voltage model)
12、 LINE INPUT Jacks LINE OU PUT Jacks Figure 1 Figure 2 -3- MIC Jackes Control Voltage Selector Switch (For multi-voltage model) AC Outlet (For single voltage model) a AC Supply Cord 1. Removal of Top Cover (1) Remove six screws marked o as shown in Figure 3 and 4. (2) Lift up the top cover in the dir
13、ection of the arrow as shown in Figure 4. Direction of Knobs Figurl! 4 2. Removal of Front Panel (1) After removing the top cover, pull out the keyboard switch assembly and eight knobs as shown in Figure 4. (2) Remove two screws holding the cassette door and door frame as shown in Figure 4, and then
14、 remove them. (3) Remove ten screws marked * from the top and bottom sides of the front panel as shown in Figures 5 and 6. (4) Carefully disconnect lead wires from keyboard indi- cator and memory indicator P.C. Boards, and pull out the front panel in the direction of the arrow as shown in Figure 5.
15、(5) After removing the front panel, remove four screws marked 6 as shown in Figure 7, and remove mem- ory indicator and keyboard indicator P.C. Board. 3. Removal of Control P.C. Board :.;,;/lfr,J;,-.,.y-, , Side Bracket (R) Meter Frame Assembly Figure 9 0 Figure 10 -=-.=: : . : .-.:-_.: Shaft -5- r-
16、i r, . 0000 Rivets Holding Plate Phone # Figure 13 ,-11 Figure 11 Tape Speed Adjust Volume Figure 12 Adjustment Procedures I . Rec/Play Combination Head Adjustment (Procedure for exchange the head.) 1. Adjustment of Head Height, Tilt Angle and Azimuth Refer to 4-(2)-14), Rec/Play Combination Head in
17、 FL Cassette Deck Mechanism of AlpageTechnical News. 2. Heads Peculiarity Reparation Adjustment (C401, 402) (1) Conneciton m 4 o 0 osc E109-3(4) 600 ohm 1 ohm T.P. 1 (1 ) R405 (R406) AC VTVM Figure 14 Unit Connect the resistors (1 ohm) to the ground side (BLK) of playback head wires (YEL, RED) and c
18、onnect other sides, of resistors to the ground. Connect the oscillator to both sides of the resistor. (Figure 15) Figure 15 (2) Set the OSC frequency to 200 Hz and adjust for 1V (0 dBV) at T.P.1 (1) by OSC output controller. (3) Increase the OSC frequency seeing the Volt meter and confirm the value
19、of the volt meter as shown in Figure 16. Choose the capacitor (C401, 402) that the peak point become to 24 kHz as shown in Figure 15. Note: C401 and C402 are not always the same capacitance. Output r,v I 220p Capacitance -? 82P 200 Hz 24 kHz -; Freq. -6- Figure 16 #, f t It II . Frequency Response A
20、djustment 1. Measuring Equipment (1) Frequency Generator (2) AC Volt Meter 2. Test Tapes (3) Oscilloscope (4) Distortion Meter AL-300 (1) AC-711 (TDK) . METAL (2) AC-512 (TDK) . Cr02 (3) CS-30 (SONY) . FeCr (4) AC-222 (TDK) or AC-223 (TDK) . NORMAL 3. Connection AF Generator AC VTVM 0 0 0 0 0 Oscill
21、oscope ._ _ ll-/l:1f:!i!i!i,!WM.l,:1w;:+.ii:et:4:M7-.:AMll/4,_,.,i!,E;JMll,-.m:;-:;#;fy;*1t:_9iiffe-=-S ,;-;!,_;, _: ?; . .:;,: ,-.,. - 16) Check left channel ievel meter to be less than -1 VU by bieas fine -L volume turning clockwise (+) and level meter to be more than+ 1 VU by turning counterclock
22、wise (-). 17) Check bias fine -R volume as well as measured under No. 16. 18) In case that level meter indicats always(-) side or fails in indicating more than+ 1VU as measured under No. 16 and 17, return to No. 12 and add mylar capacitor 0.0022 For 0.0039 Fon C221 or C222 in palallel from the botto
23、m side of P.C. Board and repeat adjustment under No. 10. 19) If OK under No. 18, check the distortion. (2) CrO2 1) Set test tape AC-512 into cassette compartment. 2) Set tape select switch at CrO2 position and bias fine and Dolby CAL. volume at center position. 3) Do the same adjustment of No. 3 to
24、No. 9 under Metal. 4) Change frequency of OSC to 10 kHz and adjust the level of volt meter to the same level as measured under No. 3 by VR131 and VR132 for bias adjustment. 5) Then, change frequency of OSC to 20 kHz and adjust the level of Volt Meter to the same level as measured under No.3 by L103
25、and L 104. 6) In case that 20 kHz level is less than that of 400 Hz and 10 kHz, add mylar capacitors C901 and C902 with dipping solder on point C (C). 7) Do the same adjustment No. 13 to No. 19 under Metal. (3) FeCr 1) Set test tape CS-30 into cassette compartment. 2) Set Tape Select switch at FeCr
26、position and bias fine and Dolby CAL. volume at center position. 3) Do the same adjustment from No. 3 to No. 9 under Metal. 4) Change frequency of OSC to 10 KHz and adjust the level of volt meter to the same level as measured under No. 3 by VR119, 120 for bias adjustment. 5) Then, change frequency o
27、f OSC to 20 KHz and adjust the level of volt meter to the same level as measured under No. 3 by L 105 and L 106. 6) In case that 20 KHz level is less than that of 400 Hz and 10 KHz, add mylar capacitors C903 and C904 with dipping solder on point D (D). 7) Do the same adjustment from No. 13 to No. 19
28、.under Metal. (4) Nomal 1) Set test tape AC-222 or AC-223 into cassette component. 2) Set tape select switch at NORM position and bias fine and Dolby CAL. volume at center position. 3) Do the same adjustment from No. 3 to No. 9 under Metal. 4) Change frequency of OSC to 10 kHz and adjsut the level o
29、f volt meter to the same level as measured under No. 3 by V R 117 and V R 118 for bias adjstment. 5) Then change frequency of OSC to 20 kHz and adjust the level of volt meter to the same level as measured under No. 3 by L 107 and L 108. 6) In case that 20 kHz level is less than that of 400 Hz and 10
30、 kHz, add mylar capacitors C905 and C906 with dipping solder on point E (E). 7) Do the some adjustment from No. 13 to No. 19 under Metal. (5) Level Calibration 1) Set test tape AC-512 into cassette compartment. 2) Set tape select switch CrO2 position. 3) Do the same adjustment from No. 3 to No. 9 un
31、der Metal. 4) Adjust the same level at No. 7 and No. 9 under Metal by VR113, 114 for rec. level adjustment. 3. Electrical Ajustment To properly test, adjust and repair Alpage AL-300 Cassette Decks the equipment listed below are needed. (1) AC Volt meter. (4) Frequency counter. (2) Dual trace oscillo
32、scope. (5) DC Volt meter. (3) Audio Generator Test Tapes (1) MTT-111 . Wow/Flutter (-10 dB, 3kHz) (2) MTT-150 or VTT-666 . Dolby Level (200 nwb/m) -8- (1 J j . j/ AL-300 STEP DESCRIPTION MODE ADJUST CHECK CONNECTION REMARKS POINT POINT INSTRUCTION ( 1 Test Tape: MTT-111 RECORD E204 (Anti-Rec Hole sh
33、ould be Tape Select (Motor covered with tape. : Norm. Inside T.P. 2 stT,pe A Monitor Adjust VR, T.P. 2 Figure 19 : Tape See Tape NR: Off Figure 12) 1 Speed Tape Adjustment (2) Bias OSC should be cut off. (Refer to Note 2.) (3) Adjust for 3,000 Hz. PLAY ( 1) Test Tape: MTT-111 Tape Select : Norm. T.P
34、. 2 (2) Adjust for 3,000 Hz. B VR129 Figure 19 (3) Pitch control VR (VR130) Monitor T.P. 2 should be positiones at click : Tape NR: Off point. PLAY Playback Tape Select 2 Level : Norm. VR123 T.P. 2 Figure 18 ( 1 Test Tape MTT-150 Adjustment Monitor VR124 T.P. 2 (2) Adjust for 580mV. : Tape NR: Off D
35、C RECORD 3 Balance Monitor VR133 T.P. 3 Figure 21 ( 1) Line Input: Nor Adjustment : Source VR134 T.P. 3 (2) Adjust for 10 V. STOP Line Tape Select ( 1) Line Input Signal: 400 Hz, Reference : Norm. VR101 T.P. 4 4 Level Monitor VR103 Figure 20 500 mV. T.P. 4 (2) Adjust for 580 mV. Adjustment : Tape NR
36、: Off STOP Monitor Tape Select ( 1 Line Input Signal: 400 Hz, : Norm. VR121 T.P. 2 5 Level Figure 20 500 mV. Adjustment Monitor VR122 T.P. 2 (2) : Source Adjust for 580 mV. NR: Off STOP Level Tape Select ( 1) Line Input Signal: 400 Hz, Meter : Norm. VR125 T.P. 5 Figure 20 500 mV. Gain Monitor VR126
37、T.P. 5 (2) Adjust for 1 V. Adjustment : Source NR: Off 6 STOP Level Tape Select ( 1 Line Input Signal: 400 Hz. Meter : Norm. VR127 Level Figure 20 500mV 0 dB Monitor VR128 Meter (2) Adjust for O dB. ( DO Marked Adjustment : Source point) on Level Meter. NR: Off -9- STEP DESCRIPTION MODE ADJUST CHECK
38、 CONNECTION REMARKS POINT POINT INSTRUCTION STOP Tape Select Test OSC : Norm. Level Monitor VR109 Level Adjust for O dB ( OD Marked Adjustment : Source VR110 Meter point) on Level Meter. 400 Hz NR: Off Test OSC : 400 Hz 7 STOP Tape Select Test OSC : Norm. Level Monitor VR111 Level Adjust for O dB (
39、OD Marked Adjustment : Source VR112 Meter point) on Level Meter. NR: Off Test OSC : 10 kHz Frequency 8 Response See Step IL Frequency Response Adjustment. Adjustment Note: 1. For adjustment, set the pitch control volume, bias fine volume and Dolby calibration volume to the mecha- nical center positi
40、on. 2. Bias cut: Ground the base of 0138 (Point A in adjustment Location) 3. Refer to adjustment procedures of AL-80 in Alpage Technical News (FL Series Cassette Deck Mechanism) for head azimuth, height, and tilt angle. Play LINE IN m 4 o 0 GND AF Generator AC VTVM Frequency Counter T.P. 2 (2) eoeol
41、/ 1111111111111111111 i I ! ! : GND Unit Unit Figure 18 0 0 Figure 19 0 Dual Oscilloscope AC VTVM DC VTVM T.P. 2 (2), 4 (4), 5 (5) rJJ Lj I l-7-i-+o T.P. 3 (3) I 7J 7J 11-/-k Unit Unit Figure 20 0 o 0 Dual Oscilloscope -10 - Figure 21 AL-300 Adjustment Location R/P Master P.C. Board -11 - Replacemen
42、t of Mechanical Parts 1. Replacement of Cassette Deck (1) Remove the top cover. (Refer to page 4 for re moval.) (2) Remove the front panel. ( Refer to ( 1) through (4) under front panel removal on page 4.) (3) Remove control P .C. Board and power P .C. Board. (Refer to page 4 for removal.) (4) Remov
43、e the cassette deck. ( Refer to page 4 for removal.) 2. Replacement of Head ( 1) Remove two screws marked and to remove the erase head as shown in Figure 22. (2) Remove two screws marked , , to remove the R/P head with the P.C. Board as shown in Figure 22. (3) After replacement with the good heads,
44、assemble them in the opposite wat to the disassembly. A f. ter assembling, adjust the head azimuth, tilte angle and the height with the test tape. (Refer to page 6 for adjustment.) Erase Head R/P Head Figure 22 ._ _ _, 3. Replacement of Sub Belt, Motor Belt, and Right and Left Flywheels. ( 1) Remove
45、 the sub belt and the motor belt, and right and left flywheels can be easily removed. (refer to page 5 for removal of the sub belt and the motor belt.) (2) After replacement with the good belts and the flywheels, clean the belt with isopropyl alcohol and assemble them in the opposite way to the dis- assembly. (3) After assembling, confirm tape speed
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