Aiwa-CT-R442-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL FM/MW/LW CASSETTE CAR STEREO AEP Model UK Model SPECIFICATIONS CT-R442 Ver 1.0 2003.03 Model Name Using Similar MechanismCT-X442 Tape Transport Mechanism TypeCDS-363AG1-A 9-877-102-01Sony Corporation 2003C0500-1e Vehicle Company C 2003.03Published by Sony Engineering Corporation RADIO

2、 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 Selectivity: 90 dB Capture

3、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 Speed: 4.8 cm/sec. S/N

4、 Ratio: 50 dB Frequency Response: 40 Hz 14,000 Hz Stereo Separation: 40 dB 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:

5、 Bass 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. RadioFans.CN 收音机爱

6、 好者资料库 2 CT-R442 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 soldering iron around 270 C dur- ing repairing. Do not touch the s

7、oldering 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 .7 2-2.Mechanical Deck Assy (CDS-363AG1-A).8 2-3.Sub Panel Assy .9 2-4.MAIN Board

8、. 10 3.ELECTRICAL ADJUSTMENT. 11 4.DIAGRAMS 4-1.Note for Printed Wiring Boards and Schematic Diagrams . 12 4-2.Printed Wiring Board MAIN Board . 13 4-3.Schematic Diagram MAIN Board (1/3) . 14 4-4.Schematic Diagram MAIN Board (2/3) . 15 4-5.Schematic Diagram MAIN Board (3/3) . 16 4-6.Printed Wiring B

9、oards KEY/AUX Boards . 18 4-7.Schematic Diagram KEY/AUX Boards . 19 4-8.IC Pin Function Description . 20 4.EXPLODED VIEWS 4-1.Main Section . 22 4-2.Front Panel Section . 23 5.ELECTRICAL PARTS LIST. 24 RadioFans.CN 收音机爱 好者资料库 3 CT-R442 SECTION 1 GENERAL This section is extracted from instruction manu

10、al. 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 to remove the cassette. 2Press and h

11、old 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 it locks. Be sure not to press any b

12、uttons 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 the unit on/off You can turn the unit

13、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 before starting the operation, unless

14、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. Muting the sound 1Press PWR/MUTE br

15、iefly. 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/right), FAD (front/rear) and H-BASS

16、(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). In H-BASS mode, turn AUDIO CONTROL

17、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 align each source modes volume to almo

18、st 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 canceled. Restoring the factory settings

19、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 SEL until “BEEP” appears on the displa

20、y. 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 return to the former display, press

21、DSPL again. RADIO OPERATION Tuning in to a station (Seek/Manual Tuning) i/kTU (TUNER) Band indicator* Stereo indicatorFrequency indication * “F” means FM. ENGLISH 4ENGLISH 4 1Press TU (TUNER) repeatedly to select the desired band (F1, F2, F3, MW, or LW). 2*Press i (to move to higher frequencies) or

22、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. The unit locates a station automatically (Seek Tuning)

23、. 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, the unit automatically switches to Monaural mode to r

24、educe noise. 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) repeatedly to select the de

25、sired 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 order (Preset Scan). To

26、 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 manually (Manual Memory) 1Pr

27、ess 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 preset station replaces t

28、he 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 tuning reception contro

29、l (ATRC) The unit automatically suppresses FM noise caused by vehicle movement, and maintains sound quality. Radio data system (RDS) features The following RDS features are available with this unit. Important The RDS features are available only during FM reception. You may not be able to activate th

30、e RDS features fully in the areas where the station is test-broadcasting the RDS signals. AUDIO CONTROLPS/A.ME TAAFSEL Tuning in to Alternative Frequency (AF) stations There are programs transmitted at different frequencies in different areas. Along with the program itself, an RDS station sends the

31、AF list data that contains the frequencies sending the same program. If the signal of the tuned-in frequency becomes weak while you are driving, the unit automatically searches the same program sent at another stronger frequency according to the AF list, so that you do not have to seek and tune in t

32、o the other frequency again. 1Press AF during FM reception to activate AF function. “AF” appears on the display.* * “AF” flashes when the unit cannot receive AF list data. Tuning in to an EON*, Traffic Program (TP) The unit automatically switches to FM reception and tunes in to an EON, traffic annou

33、ncement program when the program starts. * EON: Enhanced Other Network 1Press TA during FM reception to activate TP function. “TP” appears on the display.* During reception, “TA” appears on the display. * “TP” flashes when the unit cannot receive TP data. To turn off TP function, press TA. “TP” disa

34、ppears. Setting the volume of TP reception When TP function is activated, the traffic announcement program is tuned in at the volume set in the following procedure regardless of the volume of the other source at the time TP function is activated. 1Press and hold AF until “BOOST 40” appears on the di

35、splay. “BOOST 40” disappears approx. 5 seconds later. 2Turn AUDIO CONTROL to select a volume level (0 to 80 in increments of 5). 3Press SEL. Activating AF function and TP function at the same time 1Press AF, and then press TA. “AF” and “TP” appears on the display. Notes During MW or LW reception, th

36、e unit will not automatically tune in to a traffic announcement program. Be sure to select “F1/2/3,” “TAPE,” or “AUX IN” to activate TP function. When the unit tunes in to a traffic announcement program by way of TP function, you can increase the volume, but cannot decrease it. When the traffic anno

37、uncement program finishes, the unit automatically returns to the previous state. Tuning in to a station by specifying a Program Type (PTY) 1Press and hold TA until “PRO-TYPE” appears on the display. “PRO-TYPE” disappears approx. 5 seconds later. 2While “PRO-TYPE” is displayed, press one of the prese

38、t station buttons* for more than 0.5 seconds to select a Program Type. The unit starts to search for a station of the selected Program Type and tunes in to the station. * The Program Types are assigned to the preset station buttons as follows: Preset station button Program Type (default) 1NEWS 2SPOR

39、T 3EDUCATE 4SCIENCE 5ROCK M 6CLASSICS 5 ENGLISH Preset station buttons 1 to 6 RadioFans.CN 收音机爱 好者资料库 4 CT-R442 Changing the Program Types assigned to preset station buttons You can assign one of the following Program Types to each preset station button. NEWS, AFFAIRS, INFO, SPORT, EDUCATE, DRAMA, C

40、ULTURE, SCIENCE, VARIED, POP M, ROCK M, EASY M, LIGHT M, CLASSICS, and OTHER M 1Turn off the unit. 2Press and hold TA until “PRO-TYPE” appears in the display. 3While “PRO-TYPE” is displayed, turn AUDIO CONTROL to select the desired Program Type. 4While the selected Program Type is displayed, press a

41、 desired preset station button for 2 or more seconds. Adjusting the clock by Clock Time (CT) service The unit adjusts the clock automatically according to the CT data sent from a currently tuned-in RDS station. 1Press and hold TA, and then press AF during FM reception. “CT” appears in the display. 2

42、Turn AUDIO CONTROL to select “CT ON.” “CT” appears in the display and the clock is adjusted. To turn off CT function, select “CT OFF” in step 2. Notes In the following cases, “CT” flashes and the clock will not be adjusted: The tuned-in signal is too weak to activate this function. The tuned-in stat

43、ion is not sending CT data. The clock may not always be correct even when CT function is on. Tips and other information Presetting Alternative Frequency (AF) stations automatically Only the strongest frequencies among the AF stations that are broadcasting the same program are selected and assigned t

44、o each preset station button. 1During FM reception, make sure that “AF” and/or “TP” appear(s) in the display (see “Tuning in to Alternative Frequency (AF) stations” and “Tuning in to an EON Traffic Program (TP)”). 2Press and hold PS/A.ME until Auto Memory for AF stations starts. Displaying a Program

45、 Service (PS) name You can check the name of currently tuned-in station in the display. When the unit is tuned in to an RDS station sending PS data, the station name appears in the display. Note In the following cases, the station name will not appear in the display: The tuned-in signal is too weak

46、to activate this function. The tuned-in station is not sending PS data. Notes on emergency broadcasts The unit automatically switches to FM reception and tunes in to emergency broadcast when it starts. When the broadcast finishes, the unit automatically returns to the previous state. Be sure to turn

47、 on AF function and TP function to receive emergency broadcasts. During MW or LW reception, the unit will not tune in to the urgent broadcast. ENGLISH 6 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 playback. Playback starts in the direction that the unit played back previously. Press the following buttons to operate tape transport. 7 ENGLISH To Eject a cassette* Change the