Panasonic-SAAK331GCP-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 kHz, (Low channel)90 W per channel (5 ) 10 kHz, (High channel)90 W per channel (5 ) Total Bi- Amp power360 W n FM/AM TUNER, TERMINALS SECTION Preset stationFM 15 stations AM 15 stations Frequency Modulation (FM) Frequency range 87.

2、50 -108.00 MHz (50 kHz steps) Sensitivity2.5 V (IHF) S/N 26 dB2.2 V Antenna terminal(s)75 (unbalanced) Amplitude Modulation (AM) Frequency range522 -1629 kHz (9 kHz steps) 520 -1630 kHz (10 kHz steps) Sensitivity S/N 20 dB (at 999 kHz)560 V/m Audio performance (Amplifier) Input sensitivity/Input imp

3、edance Aux250 mV,14.7 k Phone jack TerminalStereo, 3.5 mm jack 2004 Matsushita Electric Industrial Co. Ltd. All rightsreserved.Unauthorizedcopyingand distribution is a violation of law. SA-AK331GCP Colour (S). Silver Type Mic jack Terminal0.7mV, 680 Mono, 3.5 mm n CASSETTE DECK SECTION Track system4

4、 track, 2 channel Heads 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 fl

5、utter0.18 % (WRMS) 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 Syste

6、m Specifications ORDER NO. MD0412582C3 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 SupplyAC 110- 127/220- 240

7、V, 50/60 Hz Power consumption255 W 1 Before Use 4 2 Before Repair and Adjustment 4 3 Protection Circuitry 4 4 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices 4 5 Handling the Lead-free Solder 5 5.1. About lead free solder (PbF) 5 6 Handling Precautions For Tr

8、averse Deck 6 7 Precaution of Laser Diode 7 8 Accessories 8 9 Operation Procedures 9 10 Disassembly and Assembly of Main Component 11 10.1. Disassembly flow chart 11 10.2. Gear for servicing (jig) Information 12 10.3. Disassembly of Top Cabinet 13 10.4. Disassembly of CD Lid 13 10.5. Disassembly of

9、Rear Panel 15 10.6. Disassembly of CD Mechanism Unit 15 10.7. Disassembly of Main P.C.B. 16 10.8. Disassembly of Power P.C.B. 16 10.9. Disassembly of Transformer P.C.B. 17 10.10. Disassembly of Front Panel Unit 18 10.11. Disassembly of Deck Mechanism Unit 18 10.12. CD Mechanism Main Component Replac

10、ement Procedures 19 10.13. Replacement for the pinch roller ass 馳 and head block 32 10.14. Replacement for the Deck motor ass 馳, capstan belt A, capstan belt B and winding belt 33 10.15. Replacement for the cassette lid ass 馳 36 10.16. Rectification for tape jam problem 37 11 Checking for major P.C.

11、Bs 38 Powerconsumptioninstandby mode 0.85 W Dimensions (W x H x D)250 x 330 x 341 mm Mass7.1 kg Operating temperature range+5 to +35C Operating humidity range5 to 90% RH (no condensation) n SYSTEM: SC- AK331 (GCP)Music center: SA- AK331 (GCP) Speaker: SB- AK330 (GC) Notes: 1. Specifications are subj

12、ect to change without notice. Mass and dimensions are approximate. 2. Total harmonic distortion is measured by the digital spectrum analyzer. 11.1. Checking of Main P.C.B. 38 11.2. Checking of Transformer P.C.B. 39 11.3. Checking of Panel, Deck Typically the melting point is 50 -70F (30 -40C) higher

13、. 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 remove all of the solder on the pins or

14、 solder area, and be sure to heat the soldering points with the Pb free solder until it melts enough. 5 SA-AK331GCP 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 electricity of clothes or hum

15、an 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 prevent the breakdown

16、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 the variable resistor (

17、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 a conductive material (sheet) or steel sheet on the area wh

18、ere 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 Traverse Deck The traverse

19、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-AK331GCP 7 Precaution of Laser Diode Caution : This product utilizes a laser diode with the unit turned ON, invisi

20、ble 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 disassemble the optical pick up unit, since radiation from exposed laser diode is

21、 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 PRODUCT UTILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE

22、 OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. n Use of Caution Labels 7 SA-AK331GCP 8 Accessories Remote Control FM Antenna AC Cord AM Loop Antenna AC Plug Adaptor 8 SA-AK331GCP 9 Operation Procedures 9 SA-AK331GCP 10 SA-AK331GCP 10 Disassembly and Asse

23、mbly 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 replacing the main components. 2. For reassembly after operat

24、ion 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 of “Parts Location and Replacement Parts List” (Sectio

25、n 23), 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. 11 SA-AK331GCP 10.2. Gear for servicing (

26、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 set, the “gear for s

27、ervicing” 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 below. Insert the hexagonal screwdriver (2mm) into the gear, and then project the tip of screwdriver for 1 2 mm in length. 12 SA-AK331GCP 10.3. Disas

28、sembly 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. Step 1 Connect the AC power cord. Step 2 Press the POWER button to power up the main unit. Step 3 Pres

29、s the OPEN/CLOSE button, the disc tray will open automatically . Step 4 Release the 2 claws, and then remove the CD Lid. Step 5 Press the OPEN/CLOSE button, the disc tray will close. 10.4. Disassembly of CD Lid (The CD changer unit can be removed after the CD Lid is removed) Follow the (Step 1) -(St

30、ep 2) of Item 10.3 -Disassembly of Top Cabinet Opening the disc tray automatically (Using Power Supply) 13 SA-AK331GCP Step 6 Press the 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 an

31、d 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. 14 SA-AK331GCP Step 1 Remove 8 screws and disconnect

32、wire CN2810 (Fan) at rear cabinet as shown. Step 1 Remove one screw at rear panel. Step 2 Detach the 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 por

33、tion of it. 3. Adjust Motor VR (DECK 2) for the output value shown below. Adjustment target: 2940 3060 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 Ch

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

35、 5 from AM- SG. 4. Adjust Z2602 so that the output frequency is maximized in Fig. 6. 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 tape

36、 (QZZCRA) into DECK 2 and set the unit to “REC” mode (l use “REC/STOP” key). 3. Adjust L1002 so that the output frequency is within the standard value. Standard Value: 97 8 kHz Fig.4 Fig.5 14 Measurements and Adjustments 14.2. Tuner Section 14.2.1. AM-IF Alignment 47 SA-AK331GCP Fig.6 14.2.2. AM RF

37、Adjustment 1. Connect the instrument as shown in Fig. 7. 2. Set the unit to AM mode. 3. Set AM- SG to 520kHz. 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 maxi

38、mized. 14.3.1. Cassette Deck Section 14.3.2. Tuner Section 9. Set AM- SG to 520kHz. 10. Receive 520kHz in the unit. 11. Adjust L2602 (OSC) so that the EVM- DC value is with 1.10.5V. Fig.7 14.3. Alignment Points 48 SA-AK331GCP 15 Block Diagram T- T+ F+ F- PHOTODETECTOR OPTICAL PICKUP SEMICONDUCTOR LA

39、SER Q7601 LASER POWER DRIVE M7302 SPINDLE MOTOR RESET SIGNAL GENERATOR FOCUS COIL DRIVE TRACKING 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 AN87

40、39SBTE2 FOCUS COIL/TRACKING COIL/ TRAVERSE MOTOR/ SPINDLE MOTOR DRIVE M7301 TRAVERSE MOTOR E F B A LPD LD C D SPPOL SPOUT TRVP TRP FOP B B A B F E M M 49 SA-AK331GCP MN6627953HB SERVO PROCESSOR DIGITAL SIGNAL PROCESSOR/ DIGITAL FILTER/ D/A CONVERTER TO MAIN BLOCK IC7002 NTEST60 IOMODE59 NRST68 TIMIN

41、G GENERATOR 71 X1 70 X2 (SMCK) (PMCK) MICRO COMPUTER INTERFACE 66 STAT 65 MLD 63 MCLK 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

42、ECC CIRC RAM 1 MBIT SRAM BUS CONTROL UNIT SPINDLE SERVO SERVO CPU RF INTERFACE RF AMPLIFIER 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)

43、 (SRDATA) SERIAL OUTPUT INTERFACE REGULATOR LON (DVDD2) MP3/WMA DECODER FS CONVERTER 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 F

44、OP FOM 14 IOVDD13 15, 56, 72 DVDD1,2 16, 57 DVSS13 17, 55, 69 DIGITAL OUT TX 61 OUTL 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-AK331GCP IC2601 LA1833NMNTLM FM/AM IF AMP, DET/AM OSC, MIX/FM MP

45、X SD ST SHIFT REGISTER LATCH 1 2 SWALLOW COUNTER 1/6,1/17,4 BITS 12 BITS 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

46、AM RM AMP AGC PHASE DET PILOT DET FF PILOT CANCEL (FM) TUNER 15V SUPPLY SWITCH 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 L26

47、01 232422212019181716141513 123465789101112 FM IF AMP Q2601 B B B B B RCH 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-AK331GCP MOTOR DRIVE C0GAM0000005 IC1 IC2801C2CBJG000564MICROPROCESSOR REG MLD MCLK CE MDATA SD CD_RST SWITCH BLKCK PL

48、LCLK ST/DO PLLDA Q2906 STAT Q2907 RM1 SWITCH C0HBB0000044 FL 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

49、 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 /RESTSW 82 IN15 IN26 VREF 4 VCC 7 GND 1 10OUT2 2OUT1 8VS D2 PUSH PUSH OPEN X2802 XC_IN 10 XC_OUT 11 X2801 19 BLKCK P1 2340 P18 G1 519 G13 FL12 FL30 FL6602 FL DISPLAY B B B B B B CD_RST REMOTE SENSOR Z6481 D1 JOG VOL VR6491 FROM POWER TRAN