Akai-QX3700-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL Model: QX3700 MINI HIFI MICRO COMPONENT SYSTEM www.akai.ru RadioFans.CN 收音机爱 好者资料库 STANDBY/ON LOUDNESS PHONES REMOTE FUNCTION UP/RDOWN/L Hi-Fi MICRO COMPONENT SYSTEM VOLUME QX-3700QX-3700QX-3700QX-3700QX-3700 Mini Hi-Fi Micro Component System SERVICE MANUAL RadioFans.CN 收音机爱 好者资料库 - 1

2、 - This manual is the latest at the time of printing, and does not include the modification which may be made after the printing, by the constant improvement of product. Contents I. Safety instructions. 2 II. Specifications. 3 III. Level List of Equipments or placed in a built-in installation, such

3、as a bookcase or cabinet that may impede the flow of air through the ventilation openings. 9. Heat The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other ap pliance (including amplifier) which produce heat. 10. Nonuse Periods The power cord of the

4、 appliance should be unplugged from the outlet when left unused for a long pe riod of time. 11. 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. 12. Power Lines An outdoor antenna should be locat

5、ed away from power lines. 13. 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 atten- tion to cords, at plugs, convenience receptacles, and the point where they exit from the appli

6、ance. 14. Power requirements for multi voltage (not for all mod els) Before connecting the power cord, make sure that the voltage selector on the rear panel is set to the correct voltage for you area. If not, please set it correctly. 15. Load For protecting the appliance from being damaged, rated lo

7、ad while is printed on the appliance or is explained in opera- tion instruction, that should be connected to the speaker out- put of the appliance. Never short circuit the speaker output of the appliance when the appliance is working. 16. Object and Liquid Entry Care should be taken so that objects

8、do not fall and liquids are not spilled into the enclosure through openings. 17. Cleaning Unplug the appliance from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaner. Use a damp cloth for cleaning. 18. Make your contribution to protect the environment Used batteries with

9、 the ISO symbol for recycling as well as small accumulators (rechargeable batteries), mini-batteries (cells) and starter batteries should not be thrown into the garbage can. Please leave them at an appropriate depot. Portable cart warning 19. Overloading Do not overload wall outlets and extension co

10、rds as this can result in a risk of fire or electric shock. 20. Damage Requiring Service Unplug this appliance from the wall outlet and refer servicing to qualified service personnel under the following conditions: a). The power-supply cord or the plug has been damaged; b). Objects have been fallen,

11、 or liquid has been spilled into the appliance; c). The appliance has been exposed to rain; d). The appliance does not appear to operate normally or ex- hibits a marked change in performance; e). The appliance has been dropped, or the enclosure dam aged. WARNING TO REDUCE THE RISK OF FIRE OR ELECTRI

12、C SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The lightning flash with arrowhead symbol, within an equilateral triangle, is inte

13、nded to alert the user to the presence of uninsulated “dangerous voltage” within the products enclosure; that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of import

14、ant operating and maintenance (servicing) instructions in the literature accompanying the appliance. CLASS 1 LASER PRODUCT This product contains a low power laser device. To ensure continued safety, do not remove any covers or attempt to gain access to the inside of the product. Refer any servicing

15、to qualified personnel. A. CLASSIFICATION LABEL, PLACED ON EXTERIOR SURFACE B. WARNING LABEL, PLACED INSIDE THE UNIT RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION CLASS1 LASER PRODUCT KLASSE1 LASER PRODUKT LUOKAN1 LASER LAITE KLASS1 LASER APPARAT - 3 - II. Specifications CONDITIONS OF SPECIFICATION MEA

16、SUREMENTS 1. STANDARDS ENVIRONMENTAL CONDITIONS TEMPERATURE : 23C HUMIDITY : 65% IF NO DOUBT ARISES IN THE JUDEMENT, THE MEASUREMENT CAN BE MADE UNDER CONDITIONS OF TEMPERATURE 10 TO 35C AND HUMIDITY 45 TO 85%. 2. REATED POWER SUPPLY AC: 220V 50Hz 3. LOAD IMPEDANCE SPEAKER OUTPUT : RESISTIVE LOAD AS

17、 SPECIFIED.(4 OHM) PREAMPLIFIER OUTPUT AND RECORDING OUTPUT : 47k OHM RESISTOR ( 5%) VIDEO OUTPUT: 75 OHM 4. STANDARD OPERATING CONDITION AND METHOD OF MEASUREMENT a) OPERATION METHOD, SETTING POSITION OF THE UNIT STARTING CONDITION FOR THE MEASUREMENT SHOULD BE MAINTAINED FOR TESTS OF AMPLIFIER SEC

18、TION AS EIA-RS-490, FOR TEST OF TUNER SECTION AS IHF-T-200. b) EXCEPT AS OTHERWISE SPECIFIED HEREIN, ALL TESTS SHALL BE MEASURED AT FRONT CHANNELS AND SET THE SELECTOR POSITION. c) MODULATION OF FM DODE75KHz DEVIATION AUDIO 1KHz 75 OHM d) MODULATION OF FM STEREO MPX.67.5KHz DEVIATION 7.5KHz PILOT AU

19、DIO 1 KHz e) MODULATION OF MW30% MOD. AUDIO 1KHz f)REF. OUTPUTLINE OUT Specifications 1. FM Section FM Electrical Specifications (Text Point at Line Out) MeasurementSpecificationsMeasurement Condition/Method/Remarks Description1HFFMMeasu.SSGOthers BPFMODEFreq.Level FM RANGE87MHz108MHz 30dB S/N20uVMo

20、no98MHzAdjust AUTO STOP305dBuVAuto98MHzAdjustOutput level ratio of modulation SENSITIVITYOFF to ON Pilot : ON, R ch : ON OUTPUT LEVEL0.500.1VrmsYesMono98MHz60dBuMeasure both channel test point at Line Out STEREO20dBYesAuto98MHz60dBu SEPARATION MEASURED MODE - 4 - 2. MW Section i. MW Measurement Cond

21、ition (a) Antenna Input:Loop Antenna (b) Measurement Frequency:LowerCenterUpper All versoin603kHz1008kHz 1404kHz (In case of no comment, measure at center frequency.) (c) Modulation Frequency:In case of no comment, use 1kHz 30% modulation (e) Selectivity:Arithmetical mean of 2 values at 10kHz deviat

22、ed frequency (f) Measurement Point:Test Point (At line out) ii. MW Electrical Specifications MeasurementSpecificationsMeasurement Condition/Method/Remarks DescriptionMeas.Freq.SG LevelOthers AM RANGE522KHz1611KHz 26dB S/N5.0mV/MCenterAdjustOutput level ratio of modulation OFF to ON AUTO STOP20mV/MCe

23、nterAdjustMinimum input level of Auto Stop SENSITIVITYAuto Stop Sensitivitythreshold 5.0mV/M OUTPUT LEVEL150-500MVrmsCenter10mV/MMeasure both channel test point at Line Out 3. VCD Section VCD Measurement Condition Measurement Point: At line out or video out 1. Electrical Specifications No.Test ItemU

24、nitSpecification 1Video Output LevelVp-p1.00.2 2Audio Output LevelVrms2.0+0.2/-1.0 3Audio of Resp (20Hz20KHz)dB3.5 4Audio S/N (A-WTD)dB70 5Distortion Measured channel input terminal AUX: 4.7k Terminate Frequency2dBSP out Line80Hz Adjust +3dBsMAXMeasure the level Response 12.5kHzdifference Loudness+1

25、0dB5dBH:10KHz Line1KHz Adjust -30Bar Difference from 1KHz L:100Hzout Line Out8020mVLine out Line1KHz AdjustAdjustMAX LevelTHD 2% - 6 - MeasurementSpecificationsMeasurement Condition/Method/RemarksMeasurement DescriptionTestInputInput SignalOutputVol.Method/Remarks PointSelectorFreq.LevelLevel Freque

26、ncy- 5.0 dB 3.0dBSPAUX10HzAdjust0dBsMAXMeasure the level Response- 4.0 dB 3.0dBOUT100kHzdifference from 1kHz output Super Bass+ 10dB 3.0dBSPAUX70HzAdjust0dBs30Measure the level OUTdifference ( S BASS ON)-(S BASS OFF) at 1kHz Volume Level 30 Position LoudnessLow+ 6.0 dB 3.0dBSPAUX100HzAdjust0dBs30Vol

27、ume Level 30 Equalizer- 10.0 dB 3.0dBOUTPosition High+ 5.0 dB 3.0dB10kHz - 7.0 dB 3.0dB NO.DesignationRequirementReference ModelRemark 1Standard signalEXT. MOD. InputLEADER 32161 set GeneratorModulation: AM 0-60% FM 0-99.9KHz Frequency: 0.1-140MHz Level: -20-120dBu Output: 1-50W 2AC voltmeterInter R

28、esistance 1M-10MWKENWOOD V7-1712 set 3AutomaticVP7702C1 set Distortion Meter 4CD PlayerNF3346A1 set Evaluation Filter 5Multiplex SignalKIKU SUI 3400S1 set Generator 6OscilloscopeMax Frequency of input signal;KENWOOD CO-13052 set 5MHz 7OscillatorFrequency of output signal;KENWOOD AG-203A2 set 20Hz-20

29、kHz 8Test LoopResistance: 50LEADER LPA-0701 set Frequency: 100KHz30MHz 9WOW FLUTTERMEGURO1 set METERMK-668G III. Level List of Equipments & Instruments Required for Production MASTER DGND 7805 LM1876B LM1876A 7812 2N5401 T4A AC220V IN JRC4558B JRC4558A REM FUCTION STAND LOUD VOL VOL TO VCD TO VCD TO

30、 CPU D5V SW PHONES RCHLCH LINE2 OUTLINE1 OUT +12V 8V D5V -12V 7808 7805 -22V AG +22V T SYSTEM CONNECTION 25100-3A08 VFD +5V DG REM TU SW STB CLK DI DO PT16311 SW VOL VOL MUTE STAN MENU AG +12V DATA AUX L R TUNER T-933-2 FMAM LGR TUN CE DI DO CLK VCD MEPEG DECODER L G R V G DO STB CLK DG REM +8V DG +

31、5V VIDEO OUT V2 V1 AUDIO OUT PT2314 SYSTEM CONNECTION 78E54 L R DO DI CLK CE +22V -22V -21V F1 F2 0V MUTE LEVEL STAN MENU AC10V AC17V 0V AC17V AC3V5 AC3V5 0V AC17V AC220V AC220V AC12V AC12V AC10V IV. Block diagram - 7 - V. Wiring diagram - 8 - R710 180 W505 P505P501 W501 R501 4K7 R503 4K7 R502 4K7 P

32、700 P701 C730 152 L700 1.8uH R724 100K R712 100K R713 100 R715 100 C707 10U C706 10U C715 100P R711 68K C703 10U C702 10U R705 10K R70610K R7076K8 C708 10U C709 10U R71810K R71710K R7196K8 R7166K8 C704 10U R7036K8 R7025K6 C705 10U R7015K6 R7006K8 N700A N700B R704 6K8 R714 8K2 C701 10U C700 10U R563

33、100 W100P100 W500 W502 GT GT GTGT GTGT GT GT DGND R604 10K R603 10K R602 10K R601 10K C717 100U VD201 LED VD203 LED VD205 LED VD202 LED VD200 LED VD207 IN4148 VD206 IN4148 W201P201 C403 10U C405 10U C402 47UR404 1K C404 47U R407 1K C407 100P R406 3K3 R4053K3 C406 100P C400 10U C401 10U R402 4K7 R403

34、 100K R400 100K R401 4K7 C72810U C727 10U N701B JRC4558:A N701A JRC4558:A C116 100U R726 47K R725 47K C726 10U C725 10U R723 5K6 C722 104 C723 104 C721 104 C724 104 R722 5K6 C712 2U2 C714 272 C713 272 N702 PT2314 C719 2U2 C720 10U C502 100P R508 470K R565 10K C501 103 R208100 RP200 EC-16B R500 10K C

35、505 30P C504 30P X500 12MHZ W104P104 R307 220K R306 68K C303 220U R304 15K R305 39K V302 C1815 V301 C1815 V300 A1015 C201 223 C200 223 R203 680 R200 680 R201 560 R202 560 P202 PHONES C304 102 C305 102 VD300 IN4148 VD111 IN4148 W200 P200 C301 104 C302 104 R302 4.7 R303 4.7 L302 1UH L301 1UH R300 4.7

36、R301 4.7 C114 100U C113 100U VD112 12V V102 2N5401 V101 C9014 V100 C9014 N104 L7805CV N100 L7805CV N101 L7808CV N103 L7812CV C53 100U/16V C52 100U/25V P101 W101 C125 104 C124 104 C123 1000U C122 1000U VD110 IN4001 C120 1000U/25VC121 1000U/16V C43 470U C131 103 C130 103 VD107 IN4007 VD106 IN4007 VD10

37、5 IN4007 VD104 IN4007 C132 103 C133 103 C129 103 C128 103 C300 0.15K/250V L300 UT-20 XP300 JK2 OT IN N102B LM1876TFB N102A LM1876TFA C718 22U C711 104 C710 104 C716 104 VD113 BF40C6A F101 F3.15A F300 250V/T4A F100 F3.15A C106 2200U/25V C107 2200U/25V C137 104 C138 104 C108C111 103X4 T01 P300 P301 W3

38、00 P102 W102 VD100 IN4007 VD101 IN4007 VD109 IN4007 VD108 IN4007 VD400 IN4007 VD102 IN4007 VD103 IN4007 C126 103 C127 103 C408 220U/35V R408100 R409100 R41010k VD401 22V VD402 5V1 C409 104 R111 10K R112 100 R110 100 R106 470/3W R107 100/3W C115 220U/25V C112 220U/25V R108 3K3 C100 4U7 C101 4U7 R100

39、22K R3 22K C104 330P R104 24K W104P104 C105 330P R105 24K R102 1K R103 1K C102 47uC103 47u P503W503 R512 4K7X8 R513 4K7X8 VD500 IN4148 C503 10U C506 104 R509 22K V503 C9014 V502 C9014 R564 22K R560 33K N502A JRC4558 N502B JRC4558 R561 22K N400B JRC4558:B N400A JRC4558:A R220 150 K202R222 18 R210 100

40、 R205 100 K200R209 100 K201R204 100 V201 C9014 V202 C9014 V200 C9014 R206 33K C205 104 R212 10K R213 10K R214 180 R207 1K R211 33K R215 180 C206 104 R216 180 R217 180 R218 180 R221 100 C203 104 C204 47U C202 47P VD600 IN4148 VD601 IN4148 VD603 IN4148 VD602 IN4148 AN AN AN AN AN AN AN N601 24C02 VD20

41、4 LED R720 47K R721 47K R709 68K C729 100p R708 8K2 C731 10U C732 10U DG N500 SYSTEM CONNECTION CON26P FROM LCH AG RCH +12V OUTPUT FROM V DG AG V2V1RL VIDEO OUTAUDIO OUT TO VCD MPEG DG +8V DG +5V HRS2H-S RL300 6A/250V TO TUNER CLK DO DI TUN CE TUN SW STB CLK DI DO K1 P17 P16 P15 P14 P13 P12 P11 P10

42、P9 P8 P7 P6 P5 P4 P3 F2 F2 F1 F1 P2 P1 G7 G6 G5 G4 G3 G2 G1 +5V DGND VOL2 VOL1 STAND 8 7 6 5 4 3 2 1 DG DG AG 7 6 5 3 2 1 4 8 BOUR BINR BOUL BINL LOUT LIN VCDR VCDL TUNL AUXL LOUL TURN AUXR LOUR ROUT RIN TRR TRL AGND VCC REF DI DO DG R L 3 2 1 89C58 F2 F1 -21V 0V RCHLCH SPEKEAR OUT LIN LOUT AGND RIN

43、 ROUT RL100 HRS2H-S VCD R L R L TUNER AUX IN DI DO +12 -12 RCH LCH GND 8 7 31 4 5 6 9 14 10 11 15 13 12 2 MUTE CONTROL LIN AGND RIN +8V DG DG +5V MUTE +22V -22V LOUT LGND RGND ROUT +12V DGND CPU POWER DGND VCD +5V -12V DGND +12V P00 P01 P02 P03 P04 P05 P06 P07 P20 P21 P22 P23 P24 P25 P26 P27 ALE/P P

44、SEN P10 P11 P12 P13 P14 P15 P16 P17 CE MENU REMIN STB VOL1 MUTE STAN REST X2 GND 39 38 37 36 35 34 33 32 21 22 23 24 25 26 27 28 30 29 17 16 9 1 2 3 4 5 6 7 8 11 10 12 13 14 19 18 DO STB CLK REM DGND 15 VOL2 X1 20 31 VCC +5V SW MENU VOL1 VOL2 MUTE STAN+8V +5V AG RCH LCH -12V +12V REM -21V F1 F2 DG D

45、G FC-26P CON26P2 IR200 1838 REM GND PT16311 N600 +5V -21V VDD GR5 GR4 GR3 GR2 GR1 SW1 SW2 SW3 SW4 DO DI NC CLK STB K1 K2 K3 K4 KS12 KS1 KS2 KS3 KS4 KS5 KS6 KS7 KS8 KS9 KS10 KS11 GR8 GR7 GR6 SG20 SG19 SG18 SG13 VDD SG17 SG16 SG15 SG14 LED5 LED4 LED3 LED2 LED1 OSC GND K4 K3 K2 KS5 KS4 KS2 KS1 K601 K60

46、0 K603 K606K602 K605K604 DI DO +5V +5V +5V DG DG F2 F1 -V +12V -12V L R AG +5V +8VSTAN MUTE VOL2 VOL1 SW AG DG DG +5V +5v VFD600 25100-3A08 LEVEL LEVEL -12V +12V VCC 40 REMO 250V 250V TO VCD MPEG VI. Schematic Diagram - 9 - VII. Component Diagrams i. AMP PCB Component Diagram - 10 - ii. AMP CONTROL

47、PCB Component Diagram - 11 - iii. AMP OUTPUT PCB Component Diagram - 12 - - 13 - iv. CONNECTIVE PCB Component Diagram v. CPU CONTROL PCB Component Diagram - 14 - - 15 - vi. VCD CONTROL PCB Component Diagram - 16 - vii. AUDIO/VIDEO OUTPUT PCB Component Diagram - 17 - viii. REMOTE HANDSET PCB Componen

48、t Diagram - 18 - VIII. Exploded Diagram View and Parts List A. VCD exploded - 19 - Parts list for VCD exploded view diagram LocationPart No.DiscriptionQTY 1405-AA0902-05PANEL FRONT1 2263-AA0901-06LFRONT LENS1 3370-AA0801-01FOOT CSH2 4227-AA0921-06SMTB CV CD1 5260-AA0901-01LLENS REAR1 6CSH2 7E7801-01

49、3006FRONT CONTROL PCB ASSY1 8224-AA0902-01BHOLD PCB1 9403-AA0903-01CHASSIS BOTTOM1 10370-AA0802-01FOOT CSH REAR2 11322-AA0801-01SPOG SPR6 12E7801-013007OUTPUT PCB ASSY1 13402-AA0903-05REAR COVER1 14E7801-013009TUNER PCB ASSY1 15E7801-013008MPEG PCB ASSY1 16530-V58001-01FIBER PAPER WASHER4 17401-AA0902-01TOP CABINET1 18429-A