Panasonic-SCTM23-cs-sm 电路图 维修手册.pdf

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1、ORDER NO. MD0411547C1 A6 Service Manual MODEL UNIT SC-TM23SA-TM23STEREO SB-TM23 FRONT SPEAKER SC-TM23 SB-TM23 SA-TM23 SB-TM23 Specifications Potencia de salida SC-TM 23Frontal90W RCM por canal (5) 1kHz, 10% DAT Notes: Specifications are subject to change without notice. Mass and dimensions are appro

2、ximate.Total harmonic distortion is measured by the digital spectrum analyzer. 2004 Matsushita Electric Industrial Co. Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. Amplificador SA-TM23 Potencia de salida 2000 W (P.M.P.O) Consumo de potencia 145 W Sencibilida

3、d Aux: 250 mV Rango de sintona AM: 520-1710MHz (paso de 0,2 MHz) Rango de sintona FM: Dimensiones (b x h x l) 250 mm x 330 mm x 320mm Peso: 6.4 kg aprox Alimentacin 127 V ca 10% 60 Hz 87.9-107.9 MHz (paso de 0,2 MHz 87.5-108.0 MHz (paso de 0,1 MHz Bafles SB-TM23 FRONTAL Bocina Super Tweeter - - - -

4、- - Bocina Tweeter 6 cm Bocina Woofer 16 cm IMPEDANCIA Frontal 5 Alto - - - - - - Bajo - - - - - - Dimensiones (b x h x l) 220 mm x 330 mm x 201mm Peso: 2.7 kg aprox. RadioFans.CN 收音机爱 好者资料库 WARNING This service information is designed for experienced repair technicians only and is not designed for

5、use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potencial dangers in attemping to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repai

6、r the product or products dealt with in this service information by anyone else could result in serious injury or death. ! 13 CD Test Mode Function 13.1 How to set CD test mode 13.2 CD Automatically Adjustment result indication 13.3 CD Mecha Aging Test Mode (CR20) 13.4 Micon ROM Checksum and Version

7、 Display Mode 14 Measurements and Adjustments 14.1 Cassette Deck Section 14.1.1 Tape Speed Adjustment (Deck 1 / 2) 14.1.2 Bias and Erase Voltage Check 14.1.3 Bias Frequency Adjustment (Deck 1 / 2) 14.2 Tuner Section 14.2.1 AM-IF Alignment 14.2.2 AM RF Adjustment 14.3 Alignment Points 14.3.1 Cassette

8、 Deck Section 14.3.2 Tuner Section 15 Block Diagram 16 Voltage Measurement 17 Schematic Diagram 17.1 (A) CD Servo Circuit 17.2 (B) Main (Tuner) Circuit 17.3 (B) Main Circuit 17.4 (C) Panel Circuit 17.5 (D) Transformer Circuit, (E) CD Detect Circuit, (F) Spindle Position Circuit Typically the melting

9、 point is 50 - 70F (30 - 40C) higher. Please use a high temperature soldering iron. In case of soldering iron with temperature control,please set it to 700 20F (370 10C). Pb free solder will tend to splash when heated too high (about 1100F/600C). When soldering or unsoldering, please completely remo

10、ve all of the solder on the pins or solder area, and be sure to heat the soldering points with the Pb free solder until it melts enough. 6 Handling Precautions For Traverse Deck The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electric

11、ity of clothes or human body. So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup). Handling of traverse deck (optical pickup) 1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock. 2. To p

12、revent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board). 3. Take care not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish the job in as short time as possible. 4. Do not turn th

13、e variable resistor (laser power adjustment). It has already been adjusted. 5 Grounding for electrostatic breakdown prevention 1. Human body grounding Use the anti-static wrist strap to discharge the static electricity from your body. 2. Work table grounding Put a conductive material (sheet) or stee

14、l sheet on the area where the traverse deck (optical pickup) is place, and ground the sheet. Caution : The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse deck (optical pickup). Caution when replacing the Trave

15、rse Deck The traverse deck has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections. 7 Precaution of Laser Diode CAUTION: This unit utilizes a class 1 laser. Invisible laser radiatio

16、n is emitted from the optical pickup lens. Wavelength: 780nm When the unit is turned on: 1. Do not look directly into the pick up lens. 2. Do not use optical instruments to look at the pick up lens. 3. Do not adjust the preset variable resistor on the pickup lens. 4. Do not disassemble the optical p

17、ick up unit. 5. If the optical pick up is replaced, use the manufacturers specified replacement pick up only. 6. Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. CAUTION! THIS PRODUCT UTILIZES A LASER.USE OF CONT

18、ROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUSRADIATION EXPOSURE. Use of caution label (Except for U.S.A.) 6 8 Accessories Remote Control EUR7710020 (1 Pc) FM Antenna RSA0006-L (1 Pc) AC Cord SJA168-1A (1 Pc) AM Loop Antenna N1DAAAA00001 (1

19、 Pc) 7 9 Operation Procedures 8 10 Disassembly and Assembly of Main Component “ATTENTION SERVICER” Some chassis components may have sharp edges. Be careful when disassembling and servicing. 1.-This section describes procedures for checking the operation of the major printed circuit boards and replac

20、ing the main components. 2.-For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are described only when required. 3.-Select items from the following index when checks or replacement are required. 4.-Refer to the Parts No. on the page

21、 of “Main component Replacement Procedures”, if necessary. 10.1 Disassembly flow chart The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing. To assemble the unit, reverse the steps shown in the chart as below. 10.2

22、 Gear for servicing (jig) Information 1.-This unit has a gear which is used for checking items (Open/Close of disc tray, up/down operation of traverse unit by manually) when servicing. 2.-For preparation of gear (for servicing), perform the procedures as follows. 3.-In case of re-servicing the same

23、set, the “gear for servicing” may has been taken off because it has been used. The “gear for servicing” must be stored. Remove the gear provided with mechanism cover as shown below. 9 Insert the hexagonal screwdriver (2mm) into the gear, and then project the tip of screwdriver for 1 2 mm in length.

24、10.3 Disassembly of Top Cabinet Step 1 Remove 2 screws at each side and 5 screws at rear panel. Step 2 Lift up both sides of the top cabinet, push the top cabinet towards the rear and remove the top cabinet. 10.4 Disassembly of CD Lid (The CD changer unit can be removed after the CD Lid is removed)

25、Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet Opening the disc tray automatically (Using Power Supply) Step 1 Connect the AC power cord. Step 2 Press the POWER button to power up the main unit. Step 3 Press the OPEN/CLOSE button, the disc tray will open automatically. 10 S

26、tep 4 Release the 2 claws, and then remove the CD Lid. Step 5 Press the OPEN/CLOSE button, the disc tray will close. Step 6 Press the POWER button to turn the power off. Opening the disc tray manually (Using service tools) 11 Step 1 Insert the gear tool into the hole on the underside of CD chassis a

27、nd then rotate in the direction of arrow. The disc tray will be opened. Step 2 Release the 2 claws, and then remove the CD lid cover. Step 3 Repeat Step 2 but rotate the gear tools in anti- clockwise direction Step 4 The disc tray will be closed. 10.5 Disassembly of Rear Panel Follow the (Step 1) -

28、(Step 2) of Item 10.2 - Disassembly of Top Cabinet Step 1 Remove 6screws and disconnect wire CN2810 (Fan) at rear cabinet as shown. 10.6 Disassembly of CD Mechanism Unit Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet Step 1 Remove one screw at rear panel. Step 2 Detach the

29、FFC wires (CN2801 QZZCWAT 14.1.1 Tape Speed Adjustment (Deck 1/2) 1. Set the tape edit button to “NORMAL” position. 2. Insert the test tape (QZZCWAT) to DECK 2 and playback (FWD side) the middle portion of it. 3. Adjust Motor VR (DECK 2) for the output value shown below. Adjustment target: 2940 3060

30、 Hz (NORMAL speed) 4. After alignment, assure that the output frequency of the DECK 1 FWD are within 60 Hz of the value of the output frequency of DECK 2 FWD. Fig.1 14.1.2 Bias and Erase Voltage Check 1. Set the unit “AUX” position. 2. Insert the Normal blank tape (QZZCRA) into DECK 2 and the unit t

31、o “REC” mode (use “ REC/STOP” key). 3. Measure and make sure that the output is within the standard value. Bias voltage for Deck 2144mV (Normal) Erase voltage for Deck 280mV (Normal) Fig.2 Fig.3 14.1.3 Bias Frequency Adjustment (Deck 1/2) 1. Set the unit to “AUX” position. 2. Insert the Normal blank

32、 tape (QZZCRA) into DECK 2 and set the unit to “REC” mode ( use “REC/STOP” key). 3. Adjust L1002 so that the output frequency is within the standard value. Standard Value: 97 8 kHz Fig.4 14.2 Tuner Section 14.2.1 AM-IF Alignment 1. Connect the instrument as shown in Fig.5. 2. Set the unit to AM mode

33、. 3. Apply signal as shown in Fig. 5 from AM-SG. 4. Adjust Z2602 so that the output frequency is maximized in Fig. 6. 43 Fig.5 Fig.6 14.2.2 AM RF Adjustment Connect the instrument as shown in Fig. 7. Set the unit to AM mode. Set AM-SG to 520kHz. Receive 520kHz in the unit. Adjust Z2602 (OSC) so that

34、 the EVM-AC is maximized. Set AM-SG to 600Hz. Receive 600Hz in the unit. Adjust Z2602 (ANT) so that the EVM-SG is maximized. Set AM-SG to 520kHz. Receive 520kHz in the unit. Adjust L2602 (OSC) so that the EVM-DC value is with 1.10.5V. Fig.7 14.3 Alignment Points 14.3.1 Cassette Deck Section 14.3.2 T

35、uner Section 44 15 Block Diagram 45 46 47 6601 6601 565 48 49 565 9 50 51 16 Voltage Measurement 52 53 17 Schematic Diagram SW1 : Push switch SW2 : Push switch SW3 : Open switch SW4 : CD switch SW5 : Load switch S951 : Mode switch S952 : Half switch S971 : Mode switch S972 : Half switch S975 : Recin

36、h_F switch S6101 : Open/ Close switch S6102 : CD 1 switch S6103 : CD 2 switch S6104 : CD 3 switch S6105 : CD 4 switch S6106 : CD 5 switch S6201 : Rew switch S6202 : Tuner switch S6203 : CD switch S6204 : FF switch S6205 : Stop switch S6206 : Deck 1/2 switch S6207 : Deck 2 Open switch S6208 : TAPE sw

37、itch S6209 : AUX switch S6210 : Deck 1 Open switch S6301 : Power switch S6303 : SSEQ switch S6304 : REC switch S6305 : Demo/Display switch S7201 : Rest switch VR6491 : VR Volume Jog The voltage value and waveforms are the reference voltage of this unit measured by DC electronic voltmeter (high imped

38、ance) and oscilloscope on the basis of chassis. Accordingly, there may arise some error in voltage values and waveformsdependingupon the internal impedance of the tester or the measuring unit. No mark: Playback : Rec : FM ( ) : CD Importance safety notice : Components identified by mark have special

39、 characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high- quality sound (capacitors), low-noise (resistors), etc. are used. Whenreplacing any of components, be sure to use only manufacturers specified parts shown in the parts list. Cau

40、tion ! IC, LSI and VLSI are sensitive to static electricity. Secondary trouble can be prevented by taking care during repair. Cover the parts boxes made of plastics with aluminium foil. Put a conductive mat on the work table. Ground the soldering iron. Do not touch the pins of IC, LSI or VLSI with f

41、ingers directly. (All schematic diagrams may be modified at any time with the development of the new technology) Note: 17.1 (A) CD Servo Circuit 54 55 56 17.2 (B) Main (Tuner) Circuit 57 17.3 (B) Main Circuit 58 59 60 17.4 (C) Panel Circuit 61 62 63 17.5 (D) Transformer Circuit, (E) CD Detect Circui

42、t, (F) Spindle Position Circuit H: Tri-State 5SPOUTOSpindle driver output signal 6SPPOLOSpindle driver output signal 7TRVPOSpindle driver output signal 8TRVMOSpindle driver output signal 9TRVP2OTraverse driver output signal 2 (+) 10TRVM2OTraverse driver output signal 2 (-) 11TRPOTraverse driver outp

43、ut signal (+) 12TRMOTraverse driver output signal (-) 13FOPOTraverse driver output signal (+) 14FOMOTraverse driver output signal (-) 15IOVDD3-I/O power supply 3 16DVDD1-Power supply 1 for digital circuit 17DVSS1-Digital circuit GND 1 18ADPVCCIPower voltage monitor. Power voltage input 19TEINIDSP tr

44、averse error signal input 20FEINIDSP focus error signal input 21CEAI/OHPF-Amp capacitance connection terminal 22RFENVORF envelope signal monitor 23FEOUTOFE Amp output 24FENIFE Amp reversal input 25TENITE Amp reversal input 26TEOUTOTE Amp output 27VREFOVREF output 28PDIAPC Amp input 29LDOAPC Amp outp

45、ut 30EITracking input signal 1 31FITracking input signal 2 32DITracking input signal 4 33BITracking input signal 2 Pin No. MarkI/OFunction 34CITracking input signal 3 35AIFocus input signal 1 36DCDETIDetection HPF capacitance terminal 37RFVDD-RF Amp power supply 38RESERVE-AVSS2 39RFOUTORF Amp output

46、 40RFINIAGC input 41CAGCI/OAGC control terminal 42ARFOUTOAGC output (Audio RF) 43AVSS2-Analog circuit GND 2 44ARFINIRF signal input 45DSLFODSL loop filter 46IREFII (current), Reference input 47PLLFOPLL loop filter 48PLLF0OPLL loop filter 49AVDD2-Analog circuit power supply 2 50OUTLOLCH output signal

47、 51AVSS1-Audio output circuit GND 1 52N.C.-No Connection 53AVDD1-Power supply 1 for analog circuit 54OUTRORCH output signal 55DVSS2-Digital circuit GND 2 56IOVDD1-I/O power supply 1 57DVDD2-Power supply 2 for Digital circuit 58REGONILaser diode control (H: ON) 59IOMODEII/O switching setting input 60NTESTITest mode setting input (H: ON) 61TXODigital audio interface output 62FLAGOFlag signal output 63MCLKIMicro-P serial command CLK 64MDATAIMicro-P serial comma