Pioneer-SD1000-disp-sm电路图 维修手册.pdf

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1、(R42-145- 0 .a i I l Snrri,*%r*J STEREO DISPLAY SD- l OOO/rw l I ,) 7 O2F2N) TJIONEER RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 1 . SPECIFICATIONS SEMICONDUCTORS FETs. 9 Transistors 40 Diodes 33 Cathode-ray tube 3-inch 75mm) Electrostatic _ def lection type OSCILLOSCOPE SECTION Vertical amplif

2、ier Deflection sensitivity: 20mV F-plcm Frequency response: 5Hz - 25OkHz within -3dB) lnput impedance: 190kQ lnput capacitance: BOpF Horizontal amplifier Deflection sensitivity; 20mV p-p/cm Frequency response: 5Hz - 25OkHz within -3dB) lnput impedance; 190kQ lnput capacitance: BOpF Sweep frequency r

3、ange 4 ranges 10Hz - 100kHz synchronous circuit synchronous level: More than 3/g on scope Synchronize system: I nternal Additional circuir Spot killer circuit AUDIO OSCILLATOR SECTION Frequency range 2AHz-2AkHz Automatic sweep, manual sweep +1A% or less Output level 2V or. more, variable continuousl

4、y Output srabitiry ZaHz-ZOkHz, +1dB or less Output impedance 4.7k Q or less Distortion j% or iess at 20Hz- 20kHz) Sweep time: 25 seconds from 2AHz ta 20kHz) LEVEL METERS SECTION Reference level odB = 2V lFront), odB = 20V Rear) lnput sensitivity 0dB, -10dB, -2OdB Response time 0.3 second for to OdB

5、indicate (at l kHz) Frequency response 2AHz - 2AkHz, + t dB INPUT voltages as high as 1,500 volts are present. 7.5 FRONT PAN E L A soldering iron is required. from OSC OUT, INPUT 1 (Photo 11). Remove all knobs by pulling them off their shafts. Remove the nuts from the control knob shafts. Remove the

6、 two screws in the front corners (Photo t2. The front panel can now be taken off (Photo l4). Photo 15 shows the inner side of the front panel. Photo 1 2 I7 Photo 10 Photo I lt lttS .3 I Photo 13 Photo 14 Photo 1 5 7 .6 LEVE L M ETE RS Remove the front panel as explained above. Remove two screws as s

7、hown in Photo 16. Remove the two serews from the shield plate as shown in Photo 17. The meters can now be removed (Photo 18). Photo 17 Photo 18 Photo 19 Photo 16 18 8. ALIGNMENT PROCEDURE 8.1 ZERO AXIS POSITION 1. Set both VERT. and HORIZ. POSITION controls to center position. 2. Adjust P27 on V amp

8、 PCB to obtain 0V between terminals 8 and 9 (Photo 20). 3. Tun R21 on H amplifier PCB to obtain 0V between terminals 5 and 6. 8.2 AMPLITUDE SENSITIVITY ADJUSTMENT (Photo 20) V.AMPLIFIER 1. Apply a 28mV rms lkHz sine wave signal to INPUT 1 (marked VERTICAL) on front panel. 2. Turn VERTICAL GAIN contr

9、ol to maximum, HORIZONTAL GAIN control to minimum. Adjust R31 on V amp PCB to obtain a straight line of 40mm length. Adjust R21 (horizontal position) and P27 (vertical position) so that line is centered as shown in fig. t4. Strl.IOOO H . AMPLIFIER 1. Apply same input signal as described in V. AMPLIF

10、IERIo INPUT 2 (marked HORIZONTAL) on front panel. 2. Turn VERTICAL GAIN control to minimum, HORIZONTAL GAIN control to maximum. 3. Adjust P22 to obtain a 40mm long line. 4. Adjust P21- and P27 so that line is centered as shown in fig. 15. FINAL CHECKS 1. Apply input signal as mentioned above to INPU

11、T 2. Turn both HORIZONTAL and VERTICAL GAIN controls to maximum. 2. Line should be as shown in fig. 16. 3. If necessary, adjust R31 and P22 to obtain line as shown. 3. 4. 8.3 1. 2. METER CALIBRATION (Photo 21) Apply a tkHz 2V (rms) signal to INPUTS 1 and 2 (on front panel). Set LEVEL METER switch at

12、 position 0dB. 3. Adjust R13 (vert.) and P22 (horiz.) so that both meters indicate 0dB. is. 16 Photo 21 L9 i 1il t+l J Ilt Fig. 14Fig. 15 t PIctN EEFI ELECTFIGIN IC CclFIPGIFIATIclN 15-5, 4-Chome, Ohrnoni-nrshi, Ohca-ku, Tokyo, Japan U.S. PIctN EEFI ELECTFIGIN ICEI CGFIPCFIATIcN 1 78 Commence Fload, Canlstadt New Jensey O7O72 U. S. A. PIclNEEFI ELECTFIG,NIC (EUFIclPE ) N.V. Nooncier aarr 83, 2O3O Antwenp, Be grum COPYRTGHT o SEPT. 1971 PRINTED lN JAPAN