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Akai AMI-721L/R Service Manual
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Akai AMI-721L/R Service Manual

Akai AMI-721L/R Service Manual

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Service Manual
MINI COMPONENT SYSTEM
Model : AMI-721L/R
AKAI ELECTRONICS CO., LTD.

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Summary of Contents for Akai AMI-721L/R

  • Page 1 Service Manual MINI COMPONENT SYSTEM Model : AMI-721L/R AKAI ELECTRONICS CO., LTD.
  • Page 2 TABLE OF CONTENTS SAFETY PRECAUTIONS ....................2 SAFETY INSTRUCTION ....................4 SPECIFICATION ......................6 DISASSEMBLY ......................7 REMOVE OF THE TOP COVER AND SIDE COVER ................7 REMOVE OF THE CD MECHANISM .....................7 REMOVE THE PANEL FRONT ASSEMBLY ....................7 PRINCIPAL PARTS LOCATION ..................8 DISASSEMBLY OF THE MAIN COMPONENTS ..............
  • Page 3 SAFETY PRECAUTIONS WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE laundry tub, in a wet basement, or near a swimming pool, THIS APPLIANCE TO RAIN OR MOISTURE. and the like. 2. Carts and Stands - The appliance PORTABLE CART CAUTION should be used only with a cart or RISK OF ELECTRIC SHOCKS...
  • Page 4 SAFETY PRECAUTIONS 13.Outdoor Antenna Grounding - If an outside antenna is 15.Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through connected to the receiver be sure the antenna system is openings.
  • Page 5 SAFETY INSTRUCTION PRECAUTIONS DURING SERVICING The leakage-current should be less the 0.5mA rms AC. The resistance measurement should be done between 1. Parts identified by the (*) symbol parts are critical for accessible exposed metal parts and power cord plug prongs with safety.
  • Page 6 INFORMATION SYMBOLS FOR PRIMARY DESTINATION 1. DECK TEST MODE This test mode can be used for tape speed adjustment as well as Alphabet indicates the destination of the units as listed below. bias oscillator frequency adjustment in TAPE DECK section. While pressing and holding the "TAPE II"...
  • Page 7 SPECIFICATION...
  • Page 8 DISASSEMBLY 1. REMOVE OF THE TOP COVER AND SIDE COVER 1) Remove the 5 screws(a) on the TOP COVER. 2) Removee the 7 screw(b) on the SIDE and BACK COVER. 2. REMOVE OF THE CD MECHANISM 1) Open the DOOR CD by pressing OPEN/CLOSE button on the PANEL FRONT while the POWER is tuned on.
  • Page 9 PRINCIPAL PARTS LOCATION...
  • Page 10 DISASSEMBLY OF THE MAIN COMPONENTS 1. CD PLAYER BLOCK The exchange of driving unit ass’ y. NOTE Power must be supplied before the exchange. During the exchange, prevention band for static electricity must be in wear. (To avoid the damage of pick-up for static electricity) A.
  • Page 11 DISASSEMBLY OF THE MAIN COMPONENTS The exchange of tray ass’ y. NOTE Power must not be supplied before the exchange. During the exchange, prevention band for static electricity must be in wear. (To avoid the damage of pick-up for static electricity) A.
  • Page 12 DISASSEMBLY OF THE MAIN COMPONENTS...
  • Page 13 DISASSEMBLY OF THE MAIN COMPONENTS...
  • Page 14 DISASSEMBLY OF THE MAIN COMPONENTS...
  • Page 15 EXPLODED VIEW AND PARTS LIST 1. ADR2138MW EXPLODED VIEW...
  • Page 16 EXPLODED VIEW AND PARTS LIST 2. ADR2138MW PARTS LIST DECK MODEL : ADR2138MW TYPE DISCRIPTION PART NO Q'ty NO DISCRIPTION PART NO Q'ty MAIN CHASSIS ASS'Y ADR02-041 F.R TORTION SPRING 51264-05033BB REC LEVER-F 11134-01530BA STOP/PAUSE TORTION SPRING 51263-05036PA PLAY LEVER-F 11134-01520BA SENSOR SAFETY SPRING 51264-02026PB...
  • Page 17 ADJUSTMENTS 1. TUNER SECTION FM Antenna FM RF SSG TEST EQUIPMENT Terminal(75 ohm) 75 ohm Coaxal 1. Signal Generator with a frequency range of FM broadcast. 2. Oscilloscope with a side amplifier of approximately 100 KHz. Carrier Frequency : 98MHz 3.
  • Page 18 ADJUSTMENTS E-F BALANCE ADJUSTMENT 1. Connect oscilloscope to test point TP502 and TP503 on CD PCB. Traverse Waveform 2. Press power switch on. 3. Put test disc(TCD-781) in and press play button then pause button. 4. Pressing Fast Forward button, adjust RV502 to get that the oscilloscope waveform is symmetrical on the bottom in relation to 0V, and check this level.
  • Page 19 PARTS LIST ATTENTION 1. When placing an order for parts, be sure to list the part No. , Model No. and the description of each part. Otherwise, the nondelivery of the part or the delivery of a wrong part may result. 2.
  • Page 20 PARTS LIST AMI-721R (3Band/FTZ) Part List Location Part Code Part Name Description Q'ty 10000 9CDC052003 PCB MAIN AS AMI-721(3B/RDS/EMI) 11000 9CDC046104 PCB CD AS AMI-921DPR0F(S/S MECHA) 12000 9CDC051711 PCB FRONT AS AMI-721R2F 13000 9CDC050701 PCB OPTICAL JACK AS AMI-710R0F(S/S MECHA) 14000 9CDC052100 PCB PT AS...
  • Page 21 PARTS LIST Location Part Code Part Name Description Q'ty CC253 CCXB1H102K C CERA 50V B 1000PF K (TAPPING) CC254 CCXB1H102K C CERA 50V B 1000PF K (TAPPING) CC255 CXCH1H330J C CERA 50V CH 33PF J (TAPPING) CC256 CXCH1H330J C CERA 50V CH 33PF J (TAPPING) CC257 CCXF1H103Z...
  • Page 22 PARTS LIST Location Part Code Part Name Description Q'ty CC817 CCXF1H103Z C CERA 50V F 0.01MF Z (TAPPING) CC819 CCXF1H104Z C CERA 50V F 0.1MF Z CC901 CCXF1H223Z C CERA 50V F 0.022MF Z (TAPPING) CC902 CCXF1H104Z C CERA 50V F 0.1MF Z CC903 CCXF1H104Z C CERA...
  • Page 23 PARTS LIST Location Part Code Part Name Description Q'ty CW701 9738833700 CONN AS #26 8P FLAT 220MM DZ901 DZTZ6R2A-- DIODE ZENER MTZ-6.2 52MM TAPPING DZ902 DZTZ33B--- DIODE ZENER MTZ-33B D201 DZN4148--- DIODE 1N4148 AUTO 52MM D471 DZN4148--- DIODE 1N4148 AUTO 52MM D601 DZN4148--- DIODE...
  • Page 24 PARTS LIST Location Part Code Part Name Description Q'ty L204 5LC682K822 COIL CHOKE 6.8MH L205 5LC682K822 COIL CHOKE 6.8MH L208 RD-AZ103J- R CARBON FILM 1/6 10K OHM J L251 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) L270 W581GY6095 WIRE JUMPER AWG22 1/0.65 SN 6 AUTO L601 5L0503K643...
  • Page 25 PARTS LIST Location Part Code Part Name Description Q'ty RV201 RV6417223- R SEMI FIXED VM6CK-PV(1S) B 22K OHM RV601 RV1417222- R SEMI FIXED 1/10 2.2K OHM B V6EK-PV1S RY901 5SC0201103 SW RELAY HR-CR323 2C-1P DC12V R002 W581GY6095 WIRE JUMPER AWG22 1/0.65 SN 6 AUTO R003 RD-AZ470J- R CARBON FILM...
  • Page 26 PARTS LIST Location Part Code Part Name Description Q'ty R651 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R652 RD-AZ479J- R CARBON FILM 1/6 4.7 OHM J R653 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R654 RD-4Z121J- R CARBON FILM 1/4 120 OHM J R655 RD-AZ333J-...
  • Page 27 PARTS LIST Location Part Code Part Name Description Q'ty R821 RD-4Z472J- R CARBON FILM 1/4 4.7K OHM J R822 RD-4Z472J- R CARBON FILM 1/4 4.7K OHM J R823 RD-4Z683J- R CARBON FILM 1/4 68K OHM J R824 RD-4Z103J- R CARBON FILM 1/4 10K OHM J R825 RD-4Z103J-...
  • Page 28 PARTS LIST Location Part Code Part Name Description Q'ty 9CD2412900 BRKT SIDE ABS 1.5GR 7173301011 SCREW TAPPTITE TT2 BIN 3X10 MFZN 11000 9CDC046104 PCB CD AS AMI-921DPR0F(S/S MECHA) B501 9CD6574800 PCB CD 247X197 CC501 CCXF1H103Z C CERA 50V F 0.01MF Z (TAPPING) CC502 CCXF1H103Z C CERA...
  • Page 29 PARTS LIST Location Part Code Part Name Description Q'ty R538 RD-AZ123J- R CARBON FILM 1/6 12K OHM J R539 RD-AZ123J- R CARBON FILM 1/6 12K OHM J R540 RD-AZ474J- R CARBON FILM 1/6 470K OHM J R541 RD-AZ332J- R CARBON FILM 1/6 3.3K OHM J R542 RD-AZ273J-...
  • Page 30 PARTS LIST Location Part Code Part Name Description Q'ty R577 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R578 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R579 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R580 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R581 RD-AZ222J-...
  • Page 31 PARTS LIST Location Part Code Part Name Description Q'ty CC720 CCXF1H223Z C CERA 50V F 0.022MF Z (TAPPING) CC721 CCXF1H104Z C CERA 50V F 0.1MF Z CC722 CCXF1H223Z C CERA 50V F 0.022MF Z (TAPPING) CC723 CZCH1E101J C CERA CH 25V 100PF J AXL 52MM CC724 CCZB1E221K C CERA...
  • Page 32 PARTS LIST Location Part Code Part Name Description Q'ty R758 RD-AZ334J- R CARBON FILM 1/6 330K OHM J R759 RD-AZ104J- R CARBON FILM 1/6 100K OHM J R760 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R761 RD-AZ106J- R CARBON FILM 1/6 10M OHM J R762 RD-AZ334J-...
  • Page 33 1/2 4.7M OHM J TP901 9713550400 PIN WRAPPING 1.0X2.5X15 TP902 9713550400 PIN WRAPPING 1.0X2.5X15 30000 9CDM031500 PANEL FRONT AS AMI-921DPR0F 9CD0306700 PANEL FRONT MIPS.SP.SILKX5.349GR 9CD1501300 BADGE AKAI ABS.S/V 286-385002A-03S 9CD1336800 KNOB JOG DIAL ABS. SP. 7.5GR 7173261011 SCREW TAPPTITE TT2 BIN 2.6X10 MFZN...
  • Page 34 PARTS LIST Location Part Code Part Name Description Q'ty 9CD18100A0 "DOOR COVER "A" MIPS.SP.SILK. 41GR 9CD1809400 DOOR FRAME A 9CD30080L0 SPRING CASS EJECT(L) SUS D0.8 9CD18100B0 "DOOR COVER "B" MIPS.SP.SILK. 41GR CE272 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP CE273 CEXF1H339V C ELECTRO...
  • Page 35 PARTS LIST Location Part Code Part Name Description Q'ty CE616 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP CE617 CEXF1H339V C ELECTRO 50V RSS 3.3MF (5X11) TP CE618 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP CE619 CEXF1H229V C ELECTRO 50V RSS 2.2MF (5X11) TP CE620 CEXF1E470V...
  • Page 36 PARTS LIST Location Part Code Part Name Description Q'ty CM203 CMXM1H103J C MYLAR 50V 0.01MF J (TP) CM204 CMXM1H103J C MYLAR 50V 0.01MF J (TP) CM205 CMXM1H103J C MYLAR 50V 0.01MF J (TP) CM206 CMXM1H562J C MYLAR 50V 5600 PF J CM207 CMXM1H562J C MYLAR...
  • Page 37 PARTS LIST Location Part Code Part Name Description Q'ty R210 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R211 RD-AZ222J- R CARBON FILM 1/6 2.2K OHM J R212 RD-AZ222J- R CARBON FILM 1/6 2.2K OHM J R213 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R214 RD-AZ103J-...
  • Page 38 PARTS LIST Location Part Code Part Name Description Q'ty R422 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R423 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R424 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R431 RD-AZ272J- R CARBON FILM 1/6 2.7K OHM J R432 RD-AZ272J-...
  • Page 39 PARTS LIST Location Part Code Part Name Description Q'ty R609 RD-AZ682J- R CARBON FILM 1/6 6.8K OHM J R610 RD-AZ682J- R CARBON FILM 1/6 6.8K OHM J R611 RD-AZ562J- R CARBON FILM 1/6 5.6K OHM J R612 RD-AZ562J- R CARBON FILM 1/6 5.6K OHM J R613 RD-AZ102J-...
  • Page 40 PARTS LIST Location Part Code Part Name Description Q'ty CC525 CZCH1H270J C CERA CH 50V 27PF J AXL 52MM CC526 CCXF1H104Z C CERA 50V F 0.1MF Z CC527 CCXF1H104Z C CERA 50V F 0.1MF Z CC528 CCXF1H473Z C CERA 50V F 0.047MF Z (TAPPING) CC529 CCXF1H103Z C CERA...
  • Page 41 PARTS LIST Location Part Code Part Name Description Q'ty CE517 CEXF1C221V C ELECTRO 16V RSS 220MF (8X11.5) TP CE518 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP CE519 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP CE520 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP CE521 CEXF1H479V...
  • Page 42 PARTS LIST Location Part Code Part Name Description Q'ty Q502 TKSA928AY- KSA928A-Y Q503 TKSC2331Y- KSC2331Y Q504 TKSR1003-- KSR1003 Q505 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) RV501 RV6417223- R SEMI FIXED VM6CK-PV(1S) B 22K OHM RV502 RV6417223- R SEMI FIXED VM6CK-PV(1S) B 22K OHM R501 RD-AZ474J- R CARBON FILM...
  • Page 43 PARTS LIST Location Part Code Part Name Description Q'ty D708 DZN4148--- DIODE 1N4148 AUTO 52MM FD701 DBJ703GNK- BJ703GNK IC701 1M24C04--- M24C04-BN6 IC702 1M38199721 M38199721(921DP/721L) IC703 1MSGEQ5A-- MSGEQ5A IC704 1BU4094BCF BU4094BCF(SOP16) IC705 1PNA4612HB PNA4612M00HB LD701 DLTL16KGE- LTL-16KGE(GREEN)PI3.1 LD702 DLTL16KGE- LTL-16KGE(GREEN)PI3.1 LD703 DLTL16KYE- LTL-16KYE (AMBER)PI3.1 LD704...
  • Page 44 PARTS LIST Location Part Code Part Name Description Q'ty R303 RD-AZ181J- R CARBON FILM 1/6 180 OHM J R304 RD-AZ271J- R CARBON FILM 1/6 270 OHM J R305 RD-AZ331J- R CARBON FILM 1/6 330 OHM J R306 RD-AZ391J- R CARBON FILM 1/6 390 OHM J R307 RD-AZ471J-...
  • Page 45 PARTS LIST Location Part Code Part Name Description Q'ty R712 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R713 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R714 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R715 RD-AZ333J- R CARBON FILM 1/6 33K OHM J R716 RD-AZ393J-...
  • Page 46 PARTS LIST Location Part Code Part Name Description Q'ty 9CD2412900 BRKT SIDE ABS 1.5GR 7173261011 SCREW TAPPTITE TT2 BIN 2.6X10 MFZN 7173301011 SCREW TAPPTITE TT2 BIN 3X10 MFZN 7173301011 SCREW TAPPTITE TT2 BIN 3X10 MFZN 7173301012 SCREW TAPTITE TT2 BIN 3X10 MFZN BK 9CD4207700 CUSHION FOOT URETHAN FOAM RUBBER...
  • Page 47 PARTS LIST Location Part Code Part Name Description Q'ty 7173301212 SCREW TAPPTITE TT2 BIN 3X12 MFZN BK 7173301012 SCREW TAPTITE TT2 BIN 3X10 MFZN BK 7173301212 SCREW TAPPTITE TT2 BIN 3X12 MFZN BK 47P1503600 CLAMP WIRE A NYLON 66 9CD0410400 COVER ANT 9CD9310100 LABEL AC CAUTION...