Aiwa-CT-X442-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL RADIO SECTION (FM) Frequency Range: 87.5 MHz 108 MHz Intermediate frequency: 10.7 MHz Usable Sensitivity: 12.7 dBf 50 dB Quieting Sensitivity: 17.2 dBf IF Rejection: 100 dB Frequency Response: 30 Hz 15,000 Hz S/N Ratio: 67 dB Stereo Separation: 35 dB at 1 kHz Alternate Channel Selecti

2、vity: 90 dB Capture Ratio: 3 dB (MW) Frequency Range: 531 kHz 1,602 kHz Intermediate frequency: 10.71 MHz/450 kHz Usable Sensitivity: 30 V (30 dB) (LW) Frequency Range: 144 kHz 288 kHz (1-kHz/9-kHz steps) Intermediate frequency: 10.71 MHz/450 kHz Usable Sensitivity: 30 V (30 dB) TAPE SECTION Tape Sp

3、eed: 4.8 cm/sec. S/N Ratio: 50 dB Frequency Response: 40 Hz 14,000 Hz Stereo Separation: 40 dB FM/MW/LW CASSETTE CAR STEREO AEP Model UK Model SPECIFICATIONS CT-X442 Ver 1.0 2003.02 Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeCDS-363AG1-A 9-877-054-01Sony Corporation 2003B0500

4、-1e Vehicle Company C 2003.02Published by Sony Engineering Corporation AUDIO SECTION Max. Power Output: 40 W 4 channels AUX input Input sensitivity (load impedance) AUX: 300 mV (10 k) GENERAL Power-Supply Voltage: 14.4 V (11 to 16 V allowable), DC, negative ground Load Impedance: 4 Tone Control: Bas

5、s 10 dB at 100 Hz, Treble 10 dB at 10 kHz Preamp Output Voltage (load impedance): 2.2 V (10 k) Installed size: 182 (W) 53 (H) 155 (D) mm Supplied Accessory: Carrying case (1) Specifications and external appearance are subject to change without notice due to product improvement. The tuner section adj

6、ustments are done automatically in this set. RadioFans.CN 收音机爱 好者资料库 2 CT-X442 Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit Board Repairing Keep the temperature of the sold

7、ering iron around 270 C dur- ing repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. TABLE OF CONTENTS 1.GENERAL.3 2.DISASSEMBLY 2-1.Disassembly Flow .6 2-2.Mechanical De

8、ck Assy (CDS-363AG1-A).7 2-3. Sub Panel Assy . 8 2-4. MAIN Board . 9 3.DIAGRAMS 3-1.Note for Printed Wiring Boards and Schematic Diagrams . 10 3-2.Printed Wiring Board MAIN Board . 11 3-3.Schematic Diagram MAIN Board (1/3) . 12 3-4.Schematic Diagram MAIN Board (2/3) . 13 3-5.Schematic Diagram MAIN B

9、oard (3/3) . 14 3-6.Printed Wiring Boards KEY/AUX Boards . 16 3-7.Schematic Diagram KEY/AUX Boards . 17 3-8.IC Pin Function Description . 18 4.EXPLODED VIEWS 4-1.Main Section . 20 4-2.Front Panel Section . 21 5.ELECTRICAL PARTS LIST. 22 RadioFans.CN 收音机爱 好者资料库 3 CT-X442 SECTION 1 GENERAL This sectio

10、n is extracted from instruction manual. ENGLISH 2ENGLISH 2 THEFT PROTECTION Take the front panel with you when leaving the car, and keep it in the supplied carrying case. Detaching the front panel Before detaching the front panel, remove the cassette to prevent possible damage to the unit. 1Press z

11、to remove the cassette. 2Press and hold PWR/MUTE until the unit turns off. 3Press %. (Hold the panel with one hand to prevent accidentally dropping it.) 4Remove the panel. Attaching the front panel 1Engage the left side of the front panel to the left catch on the unit. 2Push the panel forward until

12、it locks. Be sure not to press any buttons while you are attaching the panel. Note Do not touch the connector on the reverse side of the front panel. This could cause a poor or faulty connection. BASIC OPERATION, AUDIO AND CLOCK ADJUSTMENT PWR/MUTESEL DSPL TU (TUNER) SRC AUDIO CONTROL i/k Turning th

13、e unit on/off You can turn the unit on by pressing any button on the front panel except %, z, f, g and AUDIO CONTROL. The unit also turns on when you insert a cassette. Press and hold PWR/MUTE until the unit turns off. Note Most operations described in this manual require the unit to be turned on be

14、fore starting the operation, unless explicitly stated otherwise. Changing the source mode 1Press SRC. Pressing SRC cycles through source modes in the following order: *Tape Play mode (available while a cassette is in the unit) Adjusting the volume 1Turn AUDIO CONTROL. VOL (volume) indicator flashes.

15、 Muting the sound 1Press PWR/MUTE briefly. MT indicator flashes. To restore volume, briefly press PWR/MUTE again. 3 ENGLISH3 ENGLISH Adjusting sound You can select the following modes for adjusting sound depending on the music you listen to: BASS (low frequencies), TRE (high frequencies), BAL (left/

16、right), FAD (front/rear) and H-BASS (high bass). 1Press SEL repeatedly to select the mode to be adjusted. Pressing SEL cycles through the modes. The selected modes indicator flashes (except for H- BASS). 2Turn AUDIO CONTROL to increase or decrease the level for the selected mode (except for H-BASS).

17、 In H-BASS mode, turn AUDIO CONTROL to select 1, 2, 3 or off. Note Adjust the level or select on/off within 5 seconds, or the selected mode will return to previous state. Aligning the source levels (Source Level Adjuster) Volume may vary each time you change the source mode. In this case, you can al

18、ign each source modes volume to almost the same level. 1Press SRC or TU (TUNER) repeatedly to select the desired mode. 2Press DSPL while pressing SEL. “LEVEL 0” appears on the display. 3Turn AUDIO CONTROL to adjust the level. Note Adjust the level within 5 seconds, or the selected mode will be cance

19、led. Restoring the factory settings 1Turn off the unit. 2Press and hold DSPL until “LEVEL -” appears on the display. Note You can restore the factory settings only for VOL, BASS, TRE, BAL, FAD, and H-BASS, and aligned source volume levels. Setting the beep tone 1Turn off the unit. 2Press and hold SE

20、L until “BEEP” appears on the display. 3Turn AUDIO CONTROL to select ON or OFF. 4Press SEL. Setting the clock 1Press and hold DSPL until the clock indication flashes in the display. 2Press i (to set hour) or k (to set minute) and turn AUDIO CONTROL. 3Press DSPL. Displaying the clock 1Press DSPL. To

21、return to the former display, press DSPL again. RADIO OPERATION Tuning in to a station (Seek/Manual Tuning) LO i/kTU (TUNER) Band indicator* Stereo indicatorFrequency indication Local indicator * “F” means FM. ENGLISH 4ENGLISH 4 1Press TU (TUNER) repeatedly to select the desired band (F1, F2, F3, MW

22、, or LW). 2*Press i (to move to higher frequencies) or k (to move to lower frequencies) to tune in to a station. “ST” appears on the display when an FM station is broadcasting in stereo, and receiving conditions are good. *Seek Tuning and Manual Tuning Press and hold i or k until Seek Tuning starts.

23、 The unit locates a station automatically (Seek Tuning). Press i or k repeatedly to search for a desired station while increasing or decreasing the frequency step by step (Manual Tuning). To stop Seek Tuning, press i or k again. Monaural mode When FM signals become weak, or FM reception becomes poor

24、, the unit automatically switches to Monaural mode to reduce noise. Local mode Local mode allows you to tune in only to strong stations during Seek Tuning. 1Press LO before you start Seek Tuning. “LO” appears on the display. To return to Distant mode, press LO again. “LO” disappears and the unit tun

25、es in to all receivable stations. Using preset stations You must preset stations before you can tune in to a station using preset station number buttons. i/kPS/A.ME TU (TUNER) Preset station buttons 1 to 6 Preset station number Presetting stations automatically (Auto Memory) 1Press TU (TUNER) repeat

26、edly to select the desired band (F1, F2, F3, MW, or LW). 2Press and hold PS/A.ME until automatic presetting starts. The unit automatically stores up to 6 stations for each band. After completion of automatic presetting, the unit tunes in to all the stations stored on the preset station buttons in or

27、der (Preset Scan). To cancel automatic presetting, press PS/A.ME again. Checking the preset stations (Preset Scan) 1Press PS/A.ME briefly. Each preset station will be tuned in for 5 seconds in order. To cancel Preset Scan, press PS/A.ME again or any preset station button. Presetting stations manuall

28、y (Manual Memory) 1Press TU (TUNER) repeatedly to select the desired band (F1, F2, F3, MW, or LW). 2Press i or k to tune in to a desired station (see “Tuning in to a station” as well for another tuning method). 3Press and hold the desired preset station button until the unit beeps. Note A newly pres

29、et station replaces the station on the same band that was previously stored on that preset station button. Tuning in to a preset station 1Press TU (TUNER) repeatedly to select the desired band (F1, F2, F3, MW, or LW). 2Press the preset station button on which the desired station is stored. Active tu

30、ning reception control (ATRC) The unit automatically suppresses FM noise caused by vehicle movement, and maintains sound quality. TAPE PLAYBACK SRC gfz Playing a tape 1Insert a cassette to start playback. If a cassette is already inserted, press SRC repeatedly to select Tape Play mode to start playb

31、ack. Playback starts in the direction that the unit played back previously. Press the following buttons to operate tape transport. 5 ENGLISH To Eject a cassette* Change the playback side Fast-forward the upper side (l) of the tape Rewind the lower side (j) of the tape Rewind the upper side (l) of th

32、e tape Fast-forward the lower side (j) of the tape Stop fast transport and resume playback Press z f and g simultaneously g f f or g lightly* Auto Reverse function When the end of the tape is reached during playback or fast tape transport, the direction of the tape is automatically reversed, and pla

33、yback starts on the other side. Direction indications Displayed when the upper side of the cassette is being played. Displayed when the lower side of the cassette is being played. Tape transport display Upper side: During playback Lower side: During playback When you do not play back a tape Be sure

34、to eject any cassette. To prevent tape problems Before inserting a cassette into the unit, make sure that there is no slack in the tape. If necessary, take up the slack by inserting a pencil through the spindle hole and winding. Tapes of 90 minutes or longer are extremely thin and easily deformed or

35、 damaged. They are not recommended. *When you eject the cassette, the unit switches to the previous mode. * Do not press f or g all the way. Doing so may change the direction of tape transport. RadioFans.CN 收音机爱 好者资料库 4 CT-X442 AUXILIARY EQUIPMENT Listening to a CD/MD/MP3 portable player or other eq

36、uipment You can listen to equipment connected to the unit. Refer to the operating instructions for the corresponding equipment for more detailed information. Be sure to remove the inserted cassette to prevent possible damage to the unit before connecting the equipment. SRCAUX jack 1Connect a CD/MD/M

37、P3 portable player or other equipment to the units AUX jack (3.5-mm dia.). 2Press SRC repeatedly until “AUX IN” appears on the display. OTHER FUNCTIONS SRCSELAUDIO CONTROL Changing the contrast of the display 1Press and hold SRC until “CONT.” appears on the display. 2Turn AUDIO CONTROL to select “L

38、(for low)” or “H (for high).” Setting the dimmer of the display 1Press and hold SEL until “DIMMER” appears in the display. 2Turn AUDIO CONTROL to select “0 (bright)” or “1 (dimmed).” Muting the sound while using the phone When the telephone mute lead (light blue) of the unit is connected to a cellul

39、ar phone hands-free car kit, etc., the unit mutes the sound from the speakers automatically during your conversation on the cellular phone. For details, refer to the separate “INSTALLATION AND CONNECTIONS” for the unit and the instruction manual for the cellular phone hands-free car kit. ENGLISH SUP

40、PLIED MOUNTING HARDWARE FOR INSTALLATION A INSTALLATIONS The installation scenario described in this manual assumes that you have a typical car. If your specific car requires any adjustments or modifications, consult your nearest AIWA car audio dealer. PRECAUTIONS This unit is designed for negative-

41、ground, 12-V DC operation only. Before starting installation, make sure the ignition switch is set to OFF and disconnect the earth terminal of the car battery to avoid short-circuiting. Install the unit where it will not hamper the operation of the vehicle. Install the unit where it will not injure

42、the passenger if there is a sudden stop, like an emergency stop. Avoid installing the unit where it would be subject to high temperatures caused by direct sunlight or hot air from the heater, or where it would be subject to dust, dirt or excessive vibration. Use only the supplied mounting hardware,

43、for a safe and secure installation. PREINSTALLATIONS B If there is installation hardware for another receiver already in the dashboard, it must be removed. Before installing the unit in the dashboard Remove the trim plate from the unit 1 FLAP (flap panel)-type model Remove the trim plate a by pushin

44、g the side of the plate in the direction of the arrow. FIX (fixed panel)-type model Remove the trim plate a by pushing the upper and lower parts of the plate in the direction of the arrow. As for the DFP (Detachable Front Panel) -type model, the trim plate is separately packed at the factory. Remove

45、 the installation sleeve 2 Insert the levers 8 along each groove on both sides of the unit to unlock the installation sleeve 1 and pull the sleeve to detach it from the unit. BASIC INSTALLATIONS C Installation in the dashboard Note that the Installation shown is a typical example. For some car types

46、 you may need to make adjustments or modifications to install the unit. If your car is of such type, consult your nearest AIWA car audio dealer. Mounting-angle adjustment The mounting angle should be 30 degrees or less from horizontal. Caution on installation without using the sleeve D Be sure to us

47、e the supplied screws 9 shown in A to attach the mounting brackets M (not supplied). ESPAOL ACCESORIOS DE MONTAJE SUMINISTRADOS PARA LA INSTALACION A INSTALACION La instalacin descrita a lo largo de este manual presupone que tiene un coche normal. Si su coche requiere ajustes o modificaciones, consulte con su concesionario de audio para coches de AIWA ms cercano. PRECAUCIONES Este aparato fue diseado para una conexin a tierra negativa y funciona con una CC de 12 V. Antes de empezar la instalacin, compruebe que