Akai-TX-350-Service-Manual(1) 电路图 维修手册.pdf

《Akai-TX-350-Service-Manual(1) 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Akai-TX-350-Service-Manual(1) 电路图 维修手册.pdf（41页珍藏版）》请在收音机爱好者资料库上搜索。

1、Service Manual MINI COMPONENT SYSTEM Model : TX-350 /TX-550 AKAI ELECTRONICS CO., LTD. RadioFans.CN 收音机爱 好者资料库 Table of Contents - 1 - SAFETY PRECAUTIONS. 2 ADJUSTMENTS. 4 EXPLODED VIEW AND PARTS LIST . 5 WIRING DIAGRAM . 8 BLOCK DIAGRAM . 9 SCHEMATIC DIAGRAM . 10 POWER / AMP /TUNER / TAPE . 10 CD .

2、11 CONTROL . 12 PCB PATTERN LAYOUT . 13 ELECTRICAL PART LIST . 17 MINI COMPONENT SYSTEM TX-350/TX-550 RadioFans.CN 收音机爱 好者资料库 Safety Precautions - 2 - WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. CAUTION :TO REDUCE THE RISK IF ELECTRIC SHOCK, DO NOT R

3、EMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULTED DANGEROUS VOLTAGE WITHIN THE PRODUCTS ENCLOSURE THAT MAY BE SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO

4、PERSONS. THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE. CAUTION TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNL

5、ESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE. LASER SAFETY THIS UNIT EMPLOYS A LASER. ONLY QUALIFIED SERVICE PERSONNEL SHOULD REMOVE THE COVER OR ATTEMPT TO SERVICE THIS DEVICE DUE TO POSSIBLE EYE INJURY. CAUTION : USE OF ANY CONTROLS, ADJUSTMENTS, OR PROCEDURES OTHER THAN THOSE SP

6、ECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. CAUTION : TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. ATTENTION : POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPON- DANTE DE LA PRISE ET POUSSER JUSQU

7、AU FOND. Important Safety Instructions - All the safety and operating instructions should be read before the appliance is operated. - The safety and operating instructions should be retained for future reference. - All warnings on the appliance and in the operating instructions should be adhered to.

8、 - All operating and use instructions should be followed. 1. Water and Moisture - The appliance should not be used near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like. 2. Carts and Stands - The appliance should be us

9、ed only with a cart or stand that is recommended by th manufacturer. 3. An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to overturn. 4. Wall or Ceiling Mounting - The appli- ance should be mou

10、nted to a wall or ceiling only as recommended by the manufacturer. 5. Ventilation - The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may blo

11、ck the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings. 6. Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (includ

12、ing amplifiers) that produce heat. 7. Power Sources - The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance. 8. Grounding or Polarization - The precautions that should be taken so that the grounding or polarization

13、means of an appliance is not defeated. 9. Power - Cord Protection - Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit f

14、rom the appliance. 10.Protective Attachment Plug - If the appliance is equipped with an attachment plug having overload protection. This is a safety feature. See Instruction Manual for replacement or resetting of protective device. If replacement of the plug is required, be sure the service technici

15、an has used a replacement plug specified by the manufacturer that has the same overload protection as the original plug. 11.Cleaning - The appliance should be cleaned only as recommended by the manufacturer. 12.Power Lines - An outdoor antenna should be located away from power lines. CAUTION RISK OF

16、 ELECTRIC SHOCKS DO NOT OPEN PORTABLE CART Figure 2 RadioFans.CN 收音机爱 好者资料库 Safety Precautions - 3 - 13.Outdoor Antenna Grounding - If an outside antenna is connected to the receiver be sure the antenna system is grounded so as to provide some protection against voltage surges and built-up static ch

17、arges. Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna-dis charge unit, size of grounding conductors,location of antenna- discharge unit, connection to gr

18、ounding electrodes and requirements for the grounding electrode. See Figure 1. 14.Non-use Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. 15.Object and Liquid Entry - Care should be taken so that objects do not fall and liquid

19、s are not spilled into the enclosure through openings. 16.Damage Requiring Service - The appliance should be serviced by qualified service personnel when: a) The power-supply cord or the plug has been damaged; or b) Objects have fallen, or liquid has been spilled into the appliance; or c) The applia

20、nce has been exposed to rain; or d) The appliance does not appear to operate normally or exhibits a marked change in performance; or e) The appliance has been dropped, or the enclosure damaged. 17.Servicing - The user should not attempt to service the appliance beyond that described in the operating

21、 instructions. All other servicing should be referred to qualified service personnel. ANTENNA DISCHARGE UNIT (NEC SECTION 810-20) ANTENNA LEAD IN WIRE POWER SERVICE GROUNDING ELECTRODE SYSTEM (NEC ART 250 PART H) GROUND CLAMP ELECTRIC SERVICE EQUIPMENT GROUNDING CONDUCTORS (NEC SECTION 810-21) GROUN

22、D CLAMPS EXAMPLE OF ANTENNA GROUNDING NEC - NATIONAL ELECTRICAL CODE TAPE SECTION Test Tape be used HEAD ADJUSTMENT (AZIMUTH) 1. 10KHz test tape(example: MTT-114N) must be used for this adjustment. 2. Connect to VTVM or oscilloscope to the headphone jack or speaker terminal. 3. Press the play button

23、. 4. Adjust the azimuth by using a screw driver to maintain the max. L&R output voltage. 5. Adjust tape A(1), tape B(2) respectively, Please secure the azimuth position by using locking paint. RECORDING BIAS OSCILLATOR FREQUENCY ADJUSTMENT 1. Connect the frequency counter to TP603, GND. 2. Press the

24、 REC button. 3. Adjust L603 to obtain 80 KHz100Hz TapeContents Use MTT-111N3 KHzTape Speed Adjustment MTT-114N10 KHzHead Azimuth Adjustment MTT-5511BlankRecord Frequency Property VTVM Scope R-CH L-CH 47 kohm 47 kohm Input Level Measurement Point Input Point Output Level Measurement Point TAPE ALIGNM

25、ENT CHART StepItemReference ValueTest TapeAdjust PointTest PointNoteFIG. 1 Tape Speed Adjustment Normal 3,0153,025HzMTT-111NRV601 Line Out L/R Channel Confirm Wow & Flut- ter is within 0.35% FIG.1 3,0003,010HzMTT-111NRV601 Line Out L/R Channel Confirm Tape Speed of end position after adjustment at t

26、ape start position FIG.1 High 5,8206,180HzMTT-111N- - - - - - Shorted TP601, TP602 Confirm High speed after normal speed adjustment FIG.1 2 Azimuth Adjustment Maximum Level Phase:Within90 MTT-114NHead Screw Line Out L/R Channel FIG.2,3,4 3 Recording Bias Oscilla- tor Frequency Adjust- ment 80 KHz0.5

27、MTT-5511L603 TP603,GND Adjust with frequency counter connected. FIG.1 FIG. 1 : Tape Speed & Record Bias Oscillator Frequency Adjust Circuit Test Tape : MTT-111N(3kHz) MTT-5511(Blank) Frequency Counter Output Level Measurement Point Set FIG. 2 : Tape Azimuth Adjust Location (Record/Playback Head) FIG

28、. 3 : Tape Azimuth Adjust Head Screw & WaveformFIG. 4 : Tape Azimuth Adjust Circuit & Waveform Forward Side Adjust with Frequency Counter Connected L-CH Peak R-CH Peak Screw Angle Output Level within 1 dB within 1 dB L-CH Peak R-CH Peak Screw Angle VH Oscilloscope L-CH Output Level Measurement Point

29、 Set Test Tape MTT-114N (10kHz) Screen Pattern In Phase 45 90 135 180 GoodWrong Adjustments - 4 - Exploded View and Mechanical Parts List Model No:TX-350 / TX-550 - 5 - Model No: TX-350/550 Exploded View and Mechanical Parts List - 6 - NOPARTS NAMECODE NOQtyREMARKS 1PANEL FRONT9CD0307100MIPS1 2BADGE

30、 DAEWOO9CD1500900ABS1 3DOOR CASSETTE A/B9CD1810500MIPS1 4WINDOW DOOR A/B9CD16153B0ACRYL1 5DOOR FRAME A/B 9CD18113A0 9CD18113B0 ABS1 6SRING DOOR EJECT L/R9CD30078001 7DOOR CD9CD1810600MIPS1 8WINDOW FLT9CD1615400ACRYL1 9KNOB FUNCTION9CD1337900ACRYL1 10KNOB CD9CD1338000ABS1 11KNOB POWER9CD1338100ABS1 1

31、2KNOB CONTROL9CD1338200ABS1 13KNOB EQ L9CD13383L0ABS1 14KNOB EQ R9CD13383R0ABS1 15KNOB VOLUME9CD1334400ABS1 16GUIDE FLT9CD2505600ABS1 17PLATE FILTER9CD0910700PC T0.31 18BRKT SIDE 9CD2412900ABS2 19DAMPER GEAR B9CD2603200ACETAL2 20DAMPER BASE B9CD2603300ACETAL2 21LOCKER BASE 9CDOB01900ACETAL2 22LOCKER

32、 CAM9CDOB02000ACETAL2 23LOCKER SPRING9CDOB01600STS2 24CASSETTE DECK LOGIC9CD6007000ADR-2138MW1 25CUSHION FOOT9CD4207700EVA2 26COVER BACK9CD0411100MIPS1 27COVER TOP9CD0409600MIPS1 28CHASSIS BOTTOM9CD0607100SCP1 29HEAT SINK 509CD4404800AL1 ONLY AMI-N822 30HEAT SINK AL1 ONLY AMI-N722 31BRACKET HEAT SIN

33、K9CD2414400ST 0.31 32COVER SIDE L9CD04112L0MIPS1 33COVER SIDE R9CD04112R0MIPS1 34BRAKETHEAT SINK9CD2414600BSP 0.5T1 35HOLDER AC CORE 9CD2303300ABS 36CD DECK MECHA9CD60070001 37PLATE FLT9CD0909800PVC SHEET T1.02 38PLATE FUNCTION9CD0910000PVC SHEET T0.51 DESCRIPTIONS Model No: TX-350/550 Exploded View

34、 and Mechanical Parts List - 7 - NOPARTS NAMECODE NOQtyREMARKS DESCRIPTIONS P1FRONT PCB1 P2CD DECK PCB1 P3MAIN PCB1 P4POWER PCB1 S1SCREW TAPTTITE7173261011TT2 BIN 2.6 X 10 MFZN13 S2SCREW TAPTTITE7173301011TT2 BIN 3.0X10 MFZN21 S3SCREW TAPTTITE7173301212TT2 BIN 3.0X12 BK20 S4SCREW TAPTTITE7173301612T

35、T2 BIN 3.0X 6 MFZN4 S5SCREW TAPTTITE7173400611TT2 BIN 4.0X 6 MFZN4 S6SCREW WASHER9CD3102400 3.0X10+D14 MFZN1 S7SCREW WASHER9CD310240143.0X8+D14 Ref : AMI-N822 WIRING DIAGRAM - 8 - Model No:TX-350 / TX-550 PLAY HEAD R/P HEAD CW703 SN : 9738804300 7P 350MM SN : 9738835000 3P 260MM CW704 10P CONN PINSN

36、 : 9736407800 SN : 9736407600 13P CONN PIN SN : 9738833700 8P 220MM FD701 IC702 CN508 CW401 CW402 SN : 9738834100 13P 100MM CN704 CN703 CN701 SN : 9738834000 11P 150MM 50W 30W P/T CW900 CN401 CN400 FUNCTION SN:9738833900 10P 350MM CW600 CW602 CW601 TUNER CW400 CN900 SN:9738832101 7P 250MM CW503CW501

37、 CW508 CW507 CN509 CW502 MM CD MECHA. ASSY SN:9738840900 19P 110MM CN502 Pick-Up MM BLOCK DIAGRAM - 9 - Model No:TX-350 /TX-550 Schemetic Diagram - 10 - Model No:TX-350 / TX-550 Assy Name: POWER/AMP/TUNER/TAPE DA CE CK DO XIN NC PD1 VSS AM/FM XOUT VDD FMIN IFIN FM SD AMIN NC ST/MO IF REQ LW S-CURVE

38、AM/FM IF BUFF 304KHz19K19K 0 16123614513 811712491015 VDD1 R/DATA QUAL R/CLK CLOCK VSS1ANALOG V REF VSS2VSS3 PLL 1187.5Hz PLL 57KHz RDS/ARI anti aliasimg 8th switched capacitor filter comparator BIPHASE DECODER TEST Differential DECODER ALC Schemetic Diagram Model No:TX-350 / TX-550 Assy Name: CD -

39、11 - Schemetic Diagram - 12 - Model No:TX-350 /TX-550 Assy Name: CONTROL P.C.B Pattern Layout Model No:TX-350 / TX-550 Assy Name: Main PCB - 1 3 - Model No : TX- 350 / TX- 550 Assy Name : CD P.C.B P.C.B Pattern Layout - 14 - P.C.B Pattern Layout Model No:TX-350 / TX-550 Assy Name: CONTROL - 15 - 13

40、- P.C.B Pattern Layout Model No:TX-350 / TX-550 Assy Name: PT - 16 - Europe FTZ(E)Korea(K1)America(A) Asia(S,Y2,Y6) 1CN6019738833300CONN ASUL2851 #28 3P SHIELD 250MOOOO 2CN6029738833500CONN AS#28 6P SHIELD 250MMOOOO 3W6019738834300WIRE LEAD#26 1P 200MMOOOO 1110009CDC046100PCB CD ASAMI-810LN0FROOOO 2

41、B5019CD6574800PCB CD247X197OOOO 3CC501503CCXF1H103ZC CERA50V F 0.01MF Z (TAPPING)OOOO 4CC504506CCXF1H104ZC CERA50V F 0.1MF ZOOOO 5CC507CCXF1H103ZC CERA50V F 0.01MF Z (TAPPING)OOOO 6CC508CCZB1E121KC CERA25V B 120PF K (AXIAL)OOOO 7CC509CCXF1H473ZC CERA50V F 0.047MF Z (TAPPING)OOOO 8CC510CCZB1E222KC CE

42、RA25V B 2200PF K (AXIAL)OOOO 9CC511513CCXF1H104ZC CERA50V F 0.1MF ZOOOO 10CC514CCZB1E682KC CERA25V B 6800PF K (AXIAL)OOOO 11CC515CCXF1H103ZC CERA50V F 0.01MF Z (TAPPING)OOOO 12CC516CCZB1E222KC CERA25V B 2200PF K (AXIAL)OOOO 13CC517CZCH1E809KC CERACH 25V 8PF K AXL 52MMOOOO 14CC518CCZB1E472KC CERA25V

43、B 4700PF K (AXIAL)OOOO 15CC519CZCH1E309KC CERACH 25V 3PF K AXIALOOOO 16CC520CCZB1E102KC CERA25V B 1000PF K (AXIAL)OOOO 17CC521CCXF1H103ZC CERA50V F 0.01MF Z (TAPPING)OOOO 18CC522CCXF1H473ZC CERA50V F 0.047MF Z (TAPPING)OOOO 19CC523CCZB1E152KC CERA25V B 1500PF K (AXIAL)OOOO 20CC524525CZCH1H270JC CERA

44、CH 50V 27PF J AXL 52MMOOOO 21CC526527CCXF1H104ZC CERA50V F 0.1MF ZOOOO 22CC528CCXF1H473ZC CERA50V F 0.047MF Z (TAPPING)OOOO 23CC529CCXF1H103ZC CERA50V F 0.01MF Z (TAPPING)OOOO 24CC531532CCZB1E151KC CERA25V B 150PF K (AXIAL)OOOO 25CC533534CCZB1E102KC CERA25V B 1000PF K (AXIAL)OOOO 26CC535536CCXF1H103

45、ZC CERA50V F 0.01MF Z (TAPPING)OOOO 27CC537CCXF1H104ZC CERA50V F 0.1MF ZOOOO 28CC542543CCZB1E472KC CERA25V B 4700PF K (AXIAL)OOOO 29CC544550CCXF1H104ZC CERA50V F 0.1MF ZOOOO 30CC563CXCH1H101JC CERA50V CH 100PF J (TAPPING)OOOO 31CE501CEXF1H100VC ELECTRO50V RSS 10MF (5X11) TPOOOO 32CE502503CEXF1H478VC

46、 ELECTRO50V RSS 0.47MF (5X11) TPOOOO 33CE504CEXF1H100VC ELECTRO50V RSS 10MF (5X11) TPOOOO 34CE505CEXF1H478VC ELECTRO50V RSS 0.47MF (5X11) TPOOOO 35CE506CEXF1E101VC ELECTRO25V RSS 100MF (6.3X11) TPOOOO 36CE507CEXF1C221VC ELECTRO16V RSS 220MF (8X11.5) TPOOOO 37CE508510CEXF1E101VC ELECTRO25V RSS 100MF (6.3X11) TPOOOO 38CE511513