Panasonic-SAAK230-cs-sm 电路图 维修手册.pdf

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1、n AMPLIFIER SECTION RMS output power THD 10%, both channels driven 1 kHz100 W per channel (5 ) Total RMS power200 W For GC only PMPO2000 W n FM/AM TUNER, TERMINALS SECTION Preset stationFM 15 stations AM 15 stations Frequency Modulation (FM) Frequency range 87.50 -108.00 MHz (50 kHz steps) Sensitivi

2、ty2.5 V (IHF) S/N 26 dB2.2 V Antenna terminal(s)75 (unbalanced) Amplitude Modulation (AM) Frequency range For GC only522 -1629 kHz (9 kHz steps) 520 -1630 kHz (10 kHz steps) For GN only522 -1629 kHz (9 kHz steps) Sensitivity S/N 20 dB (at 999 kHz)560 V/m Audio performance (Amplifier) Input sensitivi

3、ty/Input impedance Aux250 mV,14.7 k 2004 Matsushita Electric Industrial Co. Ltd. All rightsreserved.Unauthorizedcopyingand distribution is a violation of law. SA-AK230GC SA-AK230GN Colour (S). Silver Type Phone jack TerminalStereo, 3.5 mm jack n CASSETTE DECK SECTION Track system4 track, 2 channel H

4、eads Record/playbackSolid permalloy head ErasureDouble gap ferrite head MotorDC servo motor Recording systemAC bias 100 kHz Erasing systemAC erase 100 kHz Tape speed4.8 cm/s Overall frequency response (+3 dB, - 6 dB at DECK OUT) NORMAL35 Hz -14 kHz S/N50 dB (A weighted) Wow and flutter0.18 % (WRMS)

5、Fast forward and rewind timeApprox. 120 seconds with C- 60 cassette tape n DISC SECTION Discs played 8 cm or 12 cm (1) CD- Audio (CD- DA) (2) CD- R/RW (CD- DA, MP3 formatted discs) (3) MP3 Bit rate MP332 kbps -320 kbps Sampling frequency MP332 kHz, 44.1 kHz, 48 kHz CD Stereo System Specifications OR

6、DER NO. MD0412577C3 RadioFans.CN 收音机爱 好者资料库 CD44.1 kHz Decoding16 bit linear Digital filter8 fs D/A converterMASH (1 bit DAC) Pickup Wavelength780 nm Beam SourceSemiconductor laser Audio output (Disc) Number of channels2 (Stereo) (FL,FR) n GENERAL Power Supply For GC onlyAC 220 -240 V, 50/60 Hz For

7、GN onlyAC 230 -240 V, 50 Hz Power consumption174 W Powerconsumptioninstandby mode 0.7 W 1 Before Repair and Adjustment 4 2 Protection Circuitry 4 3 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices 5 4 Handling the Lead-free Solder 5 4.1. About lead free solder

8、 (PbF) 5 5 Handling Precautions For Traverse Deck 6 6 Precaution of Laser Diode 7 7 Accessories 8 8 Operation Procedures 9 9 Disassembly and Assembly of Main Component 11 9.1. Disassembly flow chart 11 9.2. Gear for servicing (jig) Information 12 9.3. Disassembly of Top Cabinet 13 9.4. Disassembly o

9、f CD Lid 13 9.5. Disassembly of Rear Panel 15 9.6. Disassembly of CD Mechanism Unit 15 9.7. Disassembly of Main P.C.B. 16 9.8. Disassembly of Power P.C.B. 16 9.9. Disassembly of Transformer P.C.B. 17 9.10. Disassembly of Front Panel Unit 18 9.11. Disassembly of Deck Mechanism Unit 18 9.12. CD Mechan

10、ism Main Component Replacement Procedures 19 9.13. Replacement for the pinch roller ass 馳 and head block 32 9.14. Replacement for the Deck motor ass 馳, capstan belt A, capstan belt B and winding belt 33 9.15. Replacement for the cassette lid ass 馳 36 9.16. Rectification for tape jam problem 37 Dimen

11、sions (W x H x D)250 x 330 x 341 mm Mass6.9 kg Operating temperature range+5 to +35C Operating humidity range5 to 90% RH (no condensation) n SYSTEM SC- AK230 (GC)Music center: SA- AK230 (GC) Speaker: SB- AK230 (GC) SC- AK230 (GN)Music center: SA- AK230 (GN) Speaker: SB- AK230 (GC) Notes: 1. Specific

12、ations are subject to change without notice. Mass and dimensions are approximate. 2. Total harmonic distortion is measured by the digital spectrum analyzer. 10 Checking for major P.C.Bs 38 10.1. Checking of Main P.C.B. 38 10.2. Checking of Transformer P.C.B. 39 10.3. Checking of Panel, Deck Typicall

13、y the melting 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 com

14、pletely remove 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. 5 SA-AK230GC / SA-AK230GN 5 Handling Precautions For Traverse Deck The laser diode in the traverse deck (optical pickup) may break down due to potentia

15、l difference caused by static electricity 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

16、sensitive to electrical shock. 2. To prevent 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 sho

17、rt time as possible. 4. Do not turn the variable resistor (laser power adjustment). It has already been adjusted. 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

18、a conductive material (sheet) or steel 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 pick

19、up). Caution when replacing the Traverse 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. 6 SA-AK230GC / SA-AK230GN 6 Precaution of Laser Diode Cautio

20、n : This product utilizes a laser diode with the unit turned ON, invisible laser radiation is emitted from the pick up lens. Wavelength : 780 nm Maximum output radiation power from pick up : 100 W/VDE Laser radiation from pick up unit is safety level, but be sure the followings: 1. Do not disassembl

21、e the optical pick up unit, since radiation from exposed laser diode is dangerous. 2. Do not adjust the variable resistor on the pick up unit. It was already adjusted. 3. Do not look at the focus lens using optical instruments. 4. Recommend not to look at pick up lens for a long time. CAUTION! THIS

22、PRODUCT UTILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. n Use of Caution Labels 7 SA-AK230GC / SA-AK230GN 7 Accessories Remote Control FM Antenna AC Cord (For GN only) AC Cord (For GC only) AM

23、 Loop Antenna 8 SA-AK230GC / SA-AK230GN 8 Operation Procedures 9 SA-AK230GC / SA-AK230GN 10 SA-AK230GC / SA-AK230GN 9 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 p

24、rocedures for checking the operation of the major printed circuit boards and replacing 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 i

25、ndex when checks or replacement are required. 4. Refer to the Parts No. on the page of “Parts Location and Replacement Parts List” (Section 22), if necessary. 9.1. Disassembly flow chart The following chart is the procedure for disassembling the casing and inside parts for internal inspection when c

26、arrying out the servicing. To assemble the unit, reverse the steps shown in the chart as below. 11 SA-AK230GC / SA-AK230GN 9.2. 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

27、 servicing. 2. For preparation of gear (for servicing), perform the procedures as follows. 3. In case of re- servicing the same 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 mecha cover as shown b

28、elow. Insert the hexagonal screwdriver (2mm) into the gear, and then project the tip of screwdriver for 1 2 mm in length. 12 SA-AK230GC / SA-AK230GN 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

29、 remove the top cabinet. Openingthe 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. Step 4 Release the 2 claws, and then remove the CD Li

30、d. Step 5 Press the OPEN/CLOSE button, the disc tray will close. 9.3. Disassembly of Top Cabinet 9.4. Disassembly of CD Lid (The CD changer unit can be removed after the CD Lid is removed) Follow the (Step 1) -(Step 2) of Item 9.3 -Disassembly of Top Cabinet 13 SA-AK230GC / SA-AK230GN Step 6 Press t

31、he POWER button to turn the power off. Opening the disc tray manually (Using service tools) Step 1 Insert the gear tool into the hole on the underside of CD chassis and 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.

32、Step 3 Repeat Step 2 but rotate the gear tools in anti- clockwise direction. Step 4 The disc tray will be closed. 14 SA-AK230GC / SA-AK230GN Step 1 Remove 6 screws and disconnect wire CN2810 (Fan) at rear cabinet as shown. Step 1 Remove one screw at rear panel. Step 2 Detach the FFC wires (CN2801 QZ

33、ZCWAT 13.1.1. 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 Hz (NORMAL speed)

34、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 13.1.2. Bias and Erase Voltage Check 1. Set the unit “AUX” position. 2. Insert the Normal blank tape (QZZCRA) into DECK 2 and the unit to “REC” mode (use

35、“l REC/STOP” key). 3. Measure and make sure that the output is within the 1. Connect the instrument as shown in Fig.5. 2. Set the unit to AM mode. 3. Apply signal as shown in Fig. 5 from AM- SG. 4. Adjust Z2602 so that the output frequency is maximized in Fig. 6. standard value. Bias voltage for Dec

36、k 2144mV (Normal) Erase voltage for Deck 280mV (Normal) Fig.2 Fig.3 13.1.3. Bias Frequency Adjustment (Deck 1/2) 1. Set the unit to “AUX” position. 2. Insert the Normal blank tape (QZZCRA) into DECK 2 and set the unit to “REC” mode (l use “REC/STOP” key). 3. Adjust L1002 so that the output frequency

37、 is within the standard value. Standard Value: 97 8 kHz Fig.4 Fig.5 13 Measurements and Adjustments 13.2. Tuner Section 13.2.1. AM-IF Alignment 47 SA-AK230GC / SA-AK230GN Fig.6 13.2.2. AM RF Adjustment 1. Connect the instrument as shown in Fig. 7. 2. Set the unit to AM mode. 3. Set AM- SG to 520kHz.

38、 4. Receive 520kHz in the unit. 5. Adjust Z2602 (OSC) so that the EVM- AC is maximized. 6. Set AM- SG to 600Hz. 7. Receive 600Hz in the unit. 8. Adjust Z2602 (ANT) so that the EVM- SG is maximized. 13.3.1. Cassette Deck Section 13.3.2. Tuner Section 9. Set AM- SG to 520kHz. 10. Receive 520kHz in the

39、 unit. 11. Adjust L2602 (OSC) so that the EVM- DC value is with 1.10.5V. Fig.7 13.3. Alignment Points 48 SA-AK230GC / SA-AK230GN 14 Block Diagram T- T+ F+ F- PHOTODETECTOR OPTICAL PICKUP SEMICONDUCTOR LASER Q7601 LASER POWER DRIVE M7302 SPINDLE MOTOR RESET SIGNAL GENERATOR FOCUS COIL DRIVE TRACKING

40、COIL DRIVE TRAVERSE MOTOR DRIVE SPINDLE MOTOR DRIVE MUTE CH2 FOCUS COIL TRACKING COIL D4+17 D4-16 D3+15 D3-14 D1+11 D1-10 D2+13 D2-12 4PC2 3IN2 6IN1 24IN3 23IN4 1 /RST NC 18 5 NC 2 NC B B B B IC7003 AN8739SBTE2 FOCUS COIL/TRACKING COIL/ TRAVERSE MOTOR/ SPINDLE MOTOR DRIVE M7301 TRAVERSE MOTOR E F B

41、A LPD LD C D SPPOL SPOUT TRVP TRP FOP B B A B F E M M 49 SA-AK230GC / SA-AK230GN MN6627953HB SERVO PROCESSOR DIGITAL SIGNAL PROCESSOR/ DIGITAL FILTER/ D/A CONVERTER TO MAIN BLOCK IC7002 NTEST60 IOMODE59 NRST68 TIMING GENERATOR 71 X1 70 X2 (SMCK) (PMCK) MICRO COMPUTER INTERFACE 66 STAT 65 MLD 63 MCLK

42、 64 MDATA DSL/PLL/VCO 44 ARFIN 46 IREF 45 DSLF 47 PLLF 48 PLLF0 SUBCODE INTERFACE 43 AVSS2 49 AVDD2 67BLKCK 74 TXTD 73 DQSY (SBCK) (SUBC) (TXNCLDCK) 62 FLAG 1 EXT0 EFM DEMODULATION SYNC INTERPOLATION CIRC ECC CDROM ECC CIRC RAM 1 MBIT SRAM BUS CONTROL UNIT SPINDLE SERVO SERVO CPU RF INTERFACE RF AMP

43、LIFIER INPUT PORT RFVDD37 VREF27 A,B,C,D,E,F3035 A, B, C, D, E, F CEA21 LD29 LD PD28 LPD DCDET36 CAGC41 2 EXT1 3 EXT2 76 GIO0 77 GIO1 78 GIO2 75TXTCK PORT ARF RFOUT39 RFIN40 FEN24 TEN25 FEOUT23 TEOUT26 (LRCK) (BCLK) (SRDATA) SERIAL OUTPUT INTERFACE REGULATOR LON (DVDD2) MP3/WMA DECODER FS CONVERTER

44、DIGITAL FILTER 1 BIT DAC PWM LOGIC ANALOG LOWPASS FILTER RFENV22 A/D CONVERTER ADPVCC18 FEIN20 TEIN19 RFENV22 OUTPUT PORT PWMSEL4 SPPOL6 SPPOL SPOUT5 SPOUT TRVP7 TRVP TRVM 8 TRVP2 9 TRVM2 10 TRP11 TRP TRM 12 FOP13 FOP FOM 14 IOVDD13 15, 56, 72 DVDD1,2 16, 57 DVSS13 17, 55, 69 DIGITAL OUT TX 61 OUTL

45、50 OUTR 54 AVDD1 53 AVSS1 51 (LRCKIN) (BCLKIN) (SRDATIN) CD_RST STAT MLD MCLK MDATA BLKCK CD SIGNAL RCH A B X7201 B B B B B B FILTER B B B B B B 50 SA-AK230GC / SA-AK230GN IC2601 LA1833NMNTLM FM/AM IF AMP, DET/AM OSC, MIX/FM MPX SD ST SHIFT REGISTER LATCH 1 2 SWALLOW COUNTER 1/6,1/17,4 BITS 12 BITS

46、PROGRAMMABLE DIVIDER REFERENCE DIVIDER C2B I/F PLLCLK PLLDA ST/DO CE X2603 ST/DO SD S- CURVE REG FM IF FM DET AM OSC LEVEL DET BUFFER ALC DECODER STEREO SWITCH AM DET AM IF TUNING DRIVE AM/FM IF BUFFER COMP FFFF REG VCO AM MIX AM RM AMP AGC PHASE DET PILOT DET FF PILOT CANCEL (FM) TUNER 15V SUPPLY S

47、WITCH Q2606 POWER ON RESET UNIVERSAL COUNTER UNLOCK DETECTOR PHASE DETECTOR CHARGE PUMP TO CD DRIVE BLOCK PLL FREQUENCY SYNTHESIZER LC72131MDTRM IC2602 X2602 16 17 18 11 15 19107698 4CL 3DI 2CE 5DO 13 12 14 20 1 L2602 D2602 L2601 232422212019181716141513 123465789101112 FM IF AMP Q2601 B B B B B RCH

48、 A B CF2601CF2602 B FM ANT Z2620 8 (FM) MIXER OSCBUFFER Q1 (RF AMP) 6 5 17 Q2 Q3Q4 AM IFT Z2602 AM ANT 51 SA-AK230GC / SA-AK230GN MOTOR DRIVE C0GAM0000005 IC1 IC2801C2CBJG000565MICROPROCESSOR REG MLD MCLK CE MDATA SD CD_RST SWITCH BLKCK PLLCLK ST/DO PLLDA Q2906 STAT Q2907 RM1 SWITCH C0HBB0000044 FL

49、DRIVER IC6601 S7201 Q6457 LED DRIVE SW5 LOCK SW4 CD SW3 SW1 SW2 POWER SUPPLY CONTROL Q1 Q2937 Q2936 CD MOTOR SUPPLY SWITCH PLUNGER MOTOR SUPPLY CONTROL SWITCH SSEQ_LED 76 RESET 8 71 FL_RESET CS 3 72 FL_CS 74 FL_CLKSCK 9 SDATA 10 73 FL_DOUT XIN 5 XOUT 6 RMT 18 D6457 MLD 79 MDATA 80 MCLK 81 22 SD 7721 ST/DO 78 STATUS 84 CHG_CW 85 CHG_CCW 88 CHG_PLR 83 CHG_HLF 89 CHG_AD2 90 CHG_AD1 86 CHG_SW1 87 CHG_SW2 PLLCE 3 30 PLLCK 29 PLLDA X_IN 15 X_OUT 13 V_JOG_A 67 V_JOG_B 68 /