Panasonic-SAPM30MD-cs-sm 电路图 维修手册.pdf

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1、I Amplifier Section THD 10%, both channels driven HIGH2 X 6 W (6) LOW2 X 14 W (6) Total BI-AMP power2 X 20 W Input sensitivity AUX320 mV P-MD100 mV Input impedance AUX22 k P-MD10 k Output impedance Headphone16-32 I FM tuner section Frequency range87.50-108.00 MHz (0.05 MHz steps) Sensitivity1.8V (IH

2、F) S/N 26 dB1.5V Antenna terminals75 unbalanced I AM tuner section Frequency range522-1629 kHz (9kHz steps) Sensitivity S/N 20 dB500 V/m 1999 Matsushita Electronics (S) Pte. Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. SA-PM30MD Colour (S). Silver Type Area

3、(EB). Great Britain (EG). Germany and Italy TAPE SECTION AR2 MECHANISM SERIES CD SECTION RAE0155Z TRAVERSE DECK SERIES MD SECTION MR3 MECHANISM SERIES I Cassette Deck Section Track system4 track, 2 channel Heads Record/playbackSolid permalloy head ErasureDouble gap ferrite head MotorDC servo motor R

4、ecording systemAC bias 100kHz Erasing systemAC erase 100kHz Tape speed4.8 cm/s Overall frequency reponse (3dB at DECK OUT) NORMAL (TYPE I)50- Hz - 13 kHz HIGH (TYPE II)50- Hz - 13 kHz S/N ratio Normal (TYPE I)52dB (A weighted) Wow and flutter0.18 % (WRMS) Fast forward and rewind timeApprox. 120 seco

5、nds with C-60 cassette tape I MD section SystemMinidisc digital audio system RecordingMagnetic field modulation direct overwrite MD Stereo System Specification ORDER NO. MD9912156C2 RadioFans.CN 收音机爱 好者资料库 ReadingNon-contact optical system with semiconductor laser (Wavelength = 780nm) Sampling frequ

6、ency44.1 kHz Coding systemATRAC * Number of channels2 channels stereo Wow and flutterBelow measurable limit I CD section Sampling frequency44.1kHz Decoding16 bit linear Beam sourceSemiconductor laser Wave length780 nm Number of channels2 channels stereo S/N ratio SP OUT82 dB (JIS A) Wow and flutterB

7、elow measurable limit Digit filter8 fs D/A converterMASH (1 bit DAC) I General Power supply 1 Before Repair and Adjustment 3 2 Protection Circuitry 3 3 Accessories 3 4 Handling Precautions For Traverse Deck (CD/MD) 4 5 Precaution of Laser Diode 5 6 Caution for AC Mains Lead 6 7 Operation Procedures

8、7 8 Operation Check and Main Component Replacement Procedures 9 9 Self-Diagnostic Display Function 19 For EBAC 230-240 V, 50Hz For EGAC 220-230 V, 50Hz Power consumption74 W Standby ECO0.6 W NORMAL8.5 W Dimensions (WxHxD)195x288x292 mm Weight5.6 kg Notes : 1. Specifications are subject to change wit

9、hout notices. Weight and dimensions are approximate. 2. Total harmonic distortion is measured by the digital spectrum analyzer. * US and foreign patents licensed from Dolby Laboratories Licensing Corporation. I System: SC-PM30MD (EB)Music Center: SA-PM30MD (EB) Speaker: SB-PM30 (E) I System: SC-PM30

10、MD (EG)Music Center: : SA-PM30MD (EG) Speaker: SB-PM30 (EG) 10 Measurement and Adjustment 21 11 Illustration of ICs, Transistors and Diodes 25 12 Terminal Function of ICs 26 13 Block Diagram 33 14 Schematic Diagram 43 15 Printed Circuit Board 63 16 Wiring Connection Diagram 74 17 Troubleshooting Gui

11、de 75 18 Parts Location and Replacement Parts List 83 CONTENTS Page Page 2 SA-PM30MDRadioFans.CN 收音机爱 好者资料库 3 Accessories Remote Control Transmitter FM indoor antenna AC mains lead (EG) AC mains lead (EB) FM antenna Plug Adaptor (EB) AM Loop antenna 1 Before Repair and Adjustment Disconnect AC power

12、, discharge Power Supply Capacitors C905, C910 through a 10, 5W resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices. After repairs are completed, restore power gradually using a variac, to avoid overcurrent. EG Current c

13、onsumption at AC 230V, 50 Hz in NO SIGNAL mode should be 150mA. EB Current consumption at AC 240V, 50 Hz in NO SIGNAL mode should be 150mA. 2 Protection Circuitry The protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when the power is turned

14、on. Sound stops during a performance. The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are shorted, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used. If this occu

15、rs, follow the procedure outlines below: 1. Turn off the power. 2. Determine the cause of the problem and correct it. 3. Turn on the power once again after one minute. Note: When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again. Not

16、e : Refer to Packing Materials check and replace if neccessary. MD F26MD is loaded but cannot be played Communication error between the servo processor IC and the microprocessor IC (system control). Check if the flexible circuit board is disconnected. Displayed when the disc is scratched too. F22MD

17、cannot be loadedMD loading motor or MD loading mechanism error; check and replace. F28MD cannot be loadedConfirm that the disc is not catching on anything. The connection (flexible circuit board or connector cable) between the MD unit and the MD servo circuit board is disconnected or damaged; check

18、and replace if neccessary. The MD unit may be malfunctioning; replace it. F29MD cannot be ejectedConfirm that the disc is not catching anything. The connection (flexible circuit board or connector cable) between the MD unit and the MD servo circuit board is disconnected or damaged; check and replace

19、 if neccessary. The MD unit may be malfunctioning; replace it. 9.5.4. Error detection code for Cassette Mechanism Block Error CodeProblem ConditionPossible Cause H01Cassette deck maifunctionsMODE SW detection error. Faulty contact or short circuit of mechanism mode switch. (S971) H02Recording not po

20、ssibleREC INH SW detection error. Faulty contact or short circuit of REC INH switch. (S974, S975) H03Playback cannot perform.HALF SW detection error. Faulty contact or short circuit of HALF switch. (S972) H06No treble is produce when a normal tape is CrO2 SW detection error played or recorded. Exces

21、sive treble is produces when a CrO2/Metal tape is played, or the recorded treble is destorted and at a low level. Cr02 SW detection error. Faulty contact or short circuit of CrO2 switch (S973). F01The tape advances slightly and then stops. Reel pulse detection error. Faulty reel pulse, faulty hole d

22、etect IC. (IC971) F02Cassette deck will not perform TPS function Faulty TPS drive IC. (IC303) 20 SA-PM30MD Measurement condition Record timer : OFF Make sure head, capstan and pressure roller are clean. Judgeable room temperature 20 5 C (68 9 F) Measuring instrument EVM (Electronic Voltmeter) Digita

23、l frequency counter Note : If you wish to readjust the head azimuth, be sure to adjust with adhering the casette tape closely to the mechanism by pushing the cebter of cassette tape with your finger. (Shown in Fig. 1) 1. Connect the measuring instrument as shown in Fig. 2. 2. Replace azimuth screws

24、for both forward and reverse direction after removing the screw-locking bond left on the head base. (Supply part No. of azimath adjusting screw: RHD17015) 3. Playback the azimuth adjustment portion(8kHz, -20dB) of test tape(QZZCFM). Adjust the azimuth adjusting screw until the outputs of the L/Rch a

25、re maximized. (Refer to Fig. 3) Make sure that the difference in the peak level between the left and right channels does not exceed 0.5dB. 4. Perform the same adjustment in reverse playback mode. Check of the level difference forward and reverse directions 5. Playback the playback gain adjustment po

26、rtion(315Hz, 0dB) of test tape(QZZCFM). Check if level difference between forward and reverse direction is within 1.5dB. 6. After the adjustment, applyscrewlock to the azimuth adjusting screw. Normal speed (Standard value : 3000 90Hz) 1. Connect the measuring instrument as shown in Fig. 4. 2. Playba

27、ck the middle portion of the test tape (QZZCWAT). 3. Adjust motor VR for the output value shown below. (Refer to Fig. 5) Adjustment target : 3000 40Hz Fig. 4 Test tape Headazimuth adjustment (8 kHz, -20 dB); QZZCFM Tape speed adjustment (3 kHz, -10 dB); QZZCWAT Playback gain adjustment (315 Hz, 0 dB

28、); QZZCFM Normal reference blank tape; QZZCRA CrO2 blank tape; QZZCRX Fig. 1 Fig. 2 Fig. 3 Fig. 5 10 Measurement and Adjustment 10.1. Cassette Deck Section 10.1.1. Head Azimuth Adjustment 10.1.2. Tape Speed Adjustment 21 SA-PM30MD 1. Connect the measuring instrument as shown in Fig. 6. 2. Set the un

29、it to “AUX” position. 3. Insert the normal blank tape (QZZCRA) and set the unit to “REC” mode (use “GREC/STOP” key). 4. Measure and make sure that the output is within the standad value. Standard value : 16 3mV 1. Connect the measuring instrument as shown in Fig. 7. 2. Set the unit to “AUX” position

30、. 3. Insert the normal blank tape (QZZCRA) and set the unit to “REC” mode (use “GREC/STOP” key). 4. Measure and make sure that the output is within the standard value. Standard value : 98 8kHz 10.2.1. AM-IF Alignment 10.2.2. AM-RF Alignment Fig. 6 Fig. 7 10.1.3. Bias Vlotage Check 10.1.4. Bias Frequ

31、ency Check 10.2. Tuner Section SIGNAL GENERATOR or SWEEP GENERATOR RADIO DIAL SETTINGINDICATOR (ELECTRONIC VOLTMETER or OSCILLOSCOPE) ADJUSTMENT (Shown in Fig. 3) REMARKS CONNECTIONSFREQUENCY Fashion a loop of several turns of wire and radiate a signal into the loop ant. of receiver. 450kHz 30% Mod.

32、 at 400Hz Point of non- interference. (on about 600kHz) Headphones Jack (32) (Fabricate the plug as shown in Fig. 2 and then connect the lead wires of the plug to the measuring instrument.) Z102 (AM IFT)Adjust for maximum output SIGNAL GENERATOR or SWEEP GENERATOR RADIO DIAL SETTINGINDICATOR (ELECTR

33、ONIC VOLTMETER or OSCILLOSCOPE) ADJUSTMENT (Shown in Fig. 3) REMARKS CONNECTIONSFREQUENCY Fashion a loop of several turns of wire and radiate a signal into the loop ant. of receiver. 522kHzTuning capacitor fully closed Headphones Jack (32) (Fabricate the plug as shown in Fig. 2 and then connect the

34、lead wires of the plug to the measuring instrument.) Z101 (AM OSC Coil)Adjust for maximum output 603kHzTuning to signalZ101 (AM ANT Coil) 22 SA-PM30MD Fig. 8 Adjust each laser power : read power for reading (play) and write power for writing (record). 10.4.1. Necessary Instruments Laser power meter

35、(Advantest TQ8210 or compatible meter) Test disc (Pre-mastered disc RFKV0006 or RFKV0014) Recordablediscavailableonsalesroot(withmusic recorded) Insulated driver for adjustment such as a ceramic driver Jitter meter 10.4.2. Set the Unit to the Adjustment Mode 1. Perform the item “8.1.6. Checking for

36、the MD Servo P.C.B.” in “Operation Check and Main Component Replacement Procedures”, Step 1 to Step 4. 2. Turn the power on. 3. Press CD play button with no CD, cassette or MD loaded. 4. Press and hold the STOP button for at least 2 seconds, and while still pressing the STOP button, press the Forwar

37、d Skip/Search button for at least 2 seconds. The unit enters Self-Diagnostic Mode and display “TEST”. 5. While pressing STOP button on the unit, press 4 and 7 on the remote control. The unit enters doctor mode for adjustment. Cautions 1. About handling the MD unit The magnetic head is a precision un

38、it and is very Fig. 9 Fig. 10 fragile. Do not deform it. Laser diode in the optical pickup may be destroyed by the staticelectricity generated in your clothes or body. Be especially careful with the static electricity. The optical pickup is structured extremely precisely. Do not subject to the stron

39、g impact or shock. Do not touch the lens. 2. About handling the magnetic head When replacing the magnetic head, do not tighten the mounting screw (RHD17022) too firmly. If the screw is tightened too much to deform the resin, the position of the head is moved, and this affects its recording operation

40、. Recommended torque for mounting screw: 700 g cm +/- 100 g cm Reference:Thisisthesameforceasusinga screwdriver with a 15-mm diameter grip, you fasten the screw naturally with your thumb and index finger. 3. About the driver for adjusting laser power Use only insulated driver such as a ceramic drive

41、r. With the metal driver, it is not possible to adjust properly because of the induction noise. Also, if it short-circuits with the chassis, it may destroy or damage the laser diode. Recommended driver: VESSEL 9000 1.8 -30 (Ceramic driver) Cautions on optical pickup: Theopticalpickupandthemagnetiche

42、adare structured precisely; therefore, they are very fragile. Be 10.3. Alignment Points 10.4. Laser Power Adjustment 23 SA-PM30MD 4. While pressing STOP on the unit, press 4 followed by 7 on the remote. Display will now show CD E no disc, MD E no disc or TAPE E (E is shown by 3 horizontal bars) 5. P

43、ressing STOP will toggle between these displays. With MD E no disc in the display, continue with 10.4.3. careful not to touch them with the edge of the laser power meter. The sensor of the laser power meter is a very fine part. Be careful not to touch it to the optical pickup lens. Thefocuspointofth

44、elaserreachesto356F. Therefore, avoid adjusting using laser power for a long time because the sensor of the laser power meter may be burned. Do not allow the write power to even momentarily reach or exceed 7.5 mW. Doing so will result in damage to the optical pickup. Do not set the unit to the laser

45、 power adjustment mode with the MD loaded. Doing so may result in damage to the MD. 10.4.3. Adjustment Procedure 1. Enter “1” using numeric pad on the remote control with no MD loaded. FL display “Rough ADJ”. (Read power adjustment mode) 2. Slide sensor cover on the laser power meter. (Fig. 1) 3. Pl

46、ace the sensor on the laser power meter right on top of the optical pickup. (Fig. 2) 4. Confirm that the reading of the laser power meter is within the standard value. If the value is out of the range, adjust VR1. (Fig. 3) Standard value (read power) : 600W 650W Cautions Proceeding on to the subsequ

47、ent adjustment procedure with the read power exceeding 650W will result in damage to the optical pickup. 5. Press “MEMORY/ENTER” button on the unit. FL display “ROUGH ADJ.OK” flash for 3 times and display the next indication. FL display “FINE ADJ” (Write power adjustment mode) 6. Adjust VR1 until re

48、ading of the laser power meter is within the standard value. (Fig. 3) Standard value (write power) : 6.8mW 0.1mW Cautions Do not allow the write power to reach or exceed 7.5mW, even for a moment. Doing so will result in damage to the optical pickup. 7. Press “MEMORY/ENTER” button on the unit. FL dis

49、play “FINE ADJ.OK” flash for 3 times and display the next indication. FL display “ROM-D.CHECK” (ROM data check mode) 8. Confirm that the reading of the laser power meter is within the standard value. Standard value(ROM data laser power) : 320W380 9. Press “MEMORY/ENTER” button on the unit. FL display “RAM-D.CHECK” (RAM data check mode) 10. Confirm that the reading of the laser power meter is within the standard value. Standard v