Panasonic-SAAK52-cs-sm 电路图 维修手册.pdf

《Panasonic-SAAK52-cs-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Panasonic-SAAK52-cs-sm 电路图 维修手册.pdf（80页珍藏版）》请在收音机爱好者资料库上搜索。

1、I I AMPLIFIER SECTION PMPO2300 W RMS power output THD 10%, both channels driven 80 Hz, both channel driven (Low channel)100 W per channel (6 ) 1 kHz, both channel driven (High channel)40 W per channel (6 ) Total Bi-Amp power140 W per channel Input sensitivity AUX250 mV MIC0.7 mV Input Impedance AUX1

2、3 k MIC680 I I FM TUNER SECTION Frequency range87.5 - 108 MHz (50 kHz steps) Sensitivity2.5 V (IHF) S/N 26 dB2.2 V Antenna terminal(s)75 (unbalanced) I I AM TUNER SECTION Frequency range MW522 - 1629 kHz (9 kHz steps) 520 - 1630 kHz (10 kHz steps) 2001 Matsushita Electronics (S) Pte Ltd. All rights

3、reserved. Unauthorized copying and distribution is a violation of law. SA-AK52 Colour (S). Silver Type Area (GC).Asia, Latin America, Africa and Middle Near East TAPE SECTION : AR2 MECHANISM SERIES CD SECTION : RAE0152Z-3 TRAVERSE DECK SERIES SW3.200 - 7.350 MHz (0.005 MHz steps) 9.400 - 21.750 MHz

4、(0.005 MHz steps) Sensitivity MW S/N 20 dB (at 999 kHz)560 V/m SW S/N 20 dB (at 5.3 MHz)35.5 V/m I I CASSETTE DECK SECTION Track system4 track, 2 channel Heads Record/playbackSolid permalloy head ErasureDouble gap ferrite head MotorDC servo motor Recording systemAC bias 100 kHz Erasing systemAC eras

5、e 100 kHz Tape speed4.8 cm/s Frequency response (+3 dB, -6 dB at DECK OUT) NORMAL (TYPE I)35 Hz - 14 kHz HIGH (TYPE II)35 Hz - 14 kHz S/N50 dB (A weighted) Wow and flutter0.18% (WRMS) Fast forward and rewind timeApprox. 120 seconds with CD Stereo System Specifications ORDER NO. MD0101010C3 RadioFans

6、.CN 收音机爱 好者资料库 C-60 cassette tape I I CD SECTION Sampling frequency44.1 kHz Decoding16 bit linear Beam source/wave lengthSemiconductor laser/780 nm Number of channelsStereo Frequency response20 Hz - 20 kHz (+1, -2 dB) Wow and flutterBelow measurable limit Digital filter8 fs D/A converterMASH (1 bit

7、DAC) I I GENERAL Power supplyAC 110 V/127 V/220 V/230-240V, 50/60 Hz Power consumption180 W 1 Before Use 3 2 Before Repair and Adjustment 3 3 Protection Circuitry 3 4 Accessories 3 5 Handling Precautions For Traverse Deck 4 6 Precaution of Laser Diode 5 7 Operation Procedures 6 8 Operation Checks an

8、d Main Component Replacement Procedures 8 9 Self-Diagnostic Function 18 10 Description of Error Code 19 Power consumption in standby mode 0.8 W Dimensions (W x H x D)250 x 332 x 316 mm Mass9.0 kg I I SYSTEM SC-AK52(GC)Music Center: SA-AK52(GC) Speaker: SB-AK52(GC) Notes: 1. Specifiacations are subje

9、ct to change without notice. Weight and dimensions are approximate. 2. Total harmonic distortion is measured by the digital spectrum analyzer. 3. The labels “High” and “Low” on the rear of the speakers refer to High frequency and Low frequency. 11 CD Test Mode Function 20 12 Measurements and Adjustm

10、ents 20 13 Illustration of ICs, Transistors and Diodes 24 14 Terminal Function of ICs 25 15 Block Diagram 28 16 Schematic Diagram 34 17 Printed Circuit Board 48 18 Wiring Connection Diagram 58 19 Troubleshooting Guide 59 20 Parts Location and Replacement Parts List 60 CONTENTS Page Page 2 SA-AK52 Ra

11、dioFans.CN 收音机爱 好者资料库 4 Accessories Remote Control Transmitter FM indoor antenna AC mains lead Power plug adapter AM Loop antenna 1 Before Use Be sure to disconnect the mains cord before adjusting the voltage selector. Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the

12、 voltage setting for the area in which the unit will be used. (If the power supply in your area is 117V or 120V, set to the “127V” position.) Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries, the correct voltage is

13、already set.) 2 Before Repair and Adjustment Disconnect AC power, discharge Power Supply Capacitors C531, C532, C533, C534, C579 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 co

14、mpleted, restore power gradually using a variac, to avoid overcurrent. Current consumption at AC 110 V, 60 Hz in NO SIGNAL mode should be 650mA respectively. 3 Protection Circuitry The protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when th

15、e power is turned 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 ar

16、e used. If this occurs, 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 an

17、d then on again. 3 SA-AK52 RadioFans.CN 收音机爱 好者资料库 The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity of clothes or human body. So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup). G

18、G 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. The short land between the No.4 (LD) and No.5 (GND) pins on the flexible board (FFC) is shorted with a solder build-up to preve

19、nt damage to the laser diode. To connect to the PC board, be sure to open by removing the solder build-up, and finish the work quickly. 3. Take care not to apply excessive stress to the flexible board (FFC board). 4. Donotturnthevariableresistor(laserpower adjustment). It has already been adjusted.

20、G G 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 where the traverse deck (optical pickup) is placed, an

21、d 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 deck has a short point shorted with solder to pro

22、tect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections. 5 Handling Precautions For Traverse Deck 4 SA-AK52 6 Precaution of Laser Diode Caution : This product utilizes a laser diode with the unit turned ON, invisible laser ra

23、diation 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 dangerous.

24、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. ACHTUNG : Dieses Produkt enthlt eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Lase

25、rstrahlung von der Lasereinheit abgestrahlt. Wellenlnge : 780nm Maximale Strahlungsleistung der Lasereinheit :100W/VDE Die Strahlung an der Lasereinheit ist ungefhrlich, wenn folgende Punkte beachtet werden: 1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefhrlic

26、h ist. 2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen. 3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken. 4. Nicht ber lngere Zeit in die Fokussierlinse blicken. ADVARSEL: I dette a apparat anvendes laser. CAUTION! THIS PRODUCT UTILIZES A LASER. USE OF C

27、ONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. I I Use of Caution Labels 5 SA-AK52 7 Operation Procedures 6 SA-AK52 7 SA-AK52 Some chassis components may have sharp edges. Be careful when disassembling and servicing.

28、8 Operation Checks and Main Component Replacement Procedures “ATTENTION SERVICER” 1. This section describes procedures 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 pro

29、cedures. Special reassembly procedures are described only when required. 3. Select items from the following index when checks or replacement are required. Contents Disassembly and assembly main unit 1. Checking of the Main, Panel, Deck and Power P.C.B. Main Component Replacement Procedures 1. Replac

30、ement of the Traverse Deck. 2. Replacement of the Power Amplifier IC. Disassembly and assembly of the Traverse Unit Disassembly and assembly of the Disc Tray Warning: This product uses a laser diode. Refer to caution statement Precaution of Laser Diode. ACHTUNG: Die Lasereinheit nicht zerlegen. Die

31、Lasereinheit darf nur gegen eine vom Hertsteller spezifizierte Einheit ausgetauscht werden. 8 SA-AK52 Step 1 Remove 3 screws each side and 5 screws at rear panel. Step 2 Remove the Top Cabinet Step 3 Remove T-bracket. Step 4 Remove 2 screws each side of the inner chassis and a screw at the rear pane

32、l. Turn locating pin 90. (Locating pin need not have to be bent back). Step 5 Release the wires CN 300, 301, 302, 304 and 309. Remove rear panel by pulling backward and lift rear panel assy off. Remove Front Panel 8.1. Disassembly and assembly main unit 9 SA-AK52 Step 1 : Use a hexagonal wrench and

33、turn clockwise to release the tray. Step 2 : Remove the 2 screws. Step 3 : Push the CD tray in the direction shown above. Step 4 : Remove the CD lid in the direction of the arrow. Step 5 : Release the two catches shown above to remove the front cabinet from the CD Traverse Unit. Separated front and

34、rear panel assy. Removal of Inner bracket. 10 SA-AK52 Step 7 Remove 2 screws from bottom and 2 screw beside inner bracket to push forward to release the front panel.Step 8 To release inner bracket, remove 4 screws. Step 1 Remove 2 screws each side. 8.1.1. Checking for Panel, Main and Deck P.C.B. 11

35、SA-AK52 Step 6 : Reconnect all connectors. Step 7 : Use extension 14pin FFC wire for CN309. Step 8 : Supply power for troubleshooting. 8.1.2. Checking for Power P.C.B. 8.1.3. For Live Troubleshooting Procedure 12 SA-AK52 8.2.1. Replacement of the Traverse Deck Step 1 Follow the procedures in Disasse

36、mbly of the Traverse Unit ( Step 1 - Step 4 ). Step 3 Desolder the 4 legs of the 2 motors and pull out the Servo P.C.B. Step 4 Widen the 3 bosses with a flat screwdriver and pull out the 3 pins. Then remove the Traverse Deck. Step 5 Remove the flexible cable CN701. Removal of the flexible cable. Pus

37、h the top of the connector in the direction of the arrow 1, and then pull out the flexible cable in the direction of the arrow 2. Note: Insert a short pin into the flexible cable for traverse unit. Installation of the CD servo P.C.B. after replacement Step 1 Connect the FFC board. Step 2 Install the

38、 CD servo P.C.B. in the traverse deck assembly. 8.2. Main Component Replacement Procedures 13 SA-AK52 Step 1 Follow the procedures in Checking Procedure for each major P.C.B. ( Step 1 - Step 6 ). Step 4 Remove the wires at CN302, CN303 and CN304 and pull out the Main PCB. Step 5 Remove the 4 screws

39、fixed to the Power Amplifier IC. Note: Before installing the CD servo P.C.B., move the optical pickup towards the outer edge from the marking (black triangle). Otherwise, the reset detect switch (S701) mounted on the CD servo P.C.B. may be damaged. Step 6 Unsolder the terminals of Power Amp IC and r

40、eplace the respective component. 8.2.2. Replacement of the Power Amplifier IC 14 SA-AK52 Step 1 Push the lever from position A to B. Step 2 Pull the stopper (black) in the direction of arrow 1 and push the lever in the direction of arrow 2. Step 3 Push the stopper (black) down until the white lever

41、eject out. Step 4 Lift up the traverse unit and slide out the unit as shown. Replacement of Traverse Unit Step 1 Place the traverse unit as shown. Step 2 Press in the lever shaft in the direction of arrow 1 as shown and push the traverse unit into the position in the direction of arrow 2. Step 3 Pul

42、l the stopper in the direction of arrow 1 and release the lever in the direction of arrow 2 as shown. Step 4 Pull out the tray half way and push it back fully. Step 5 Push the lever to the initial position indicated |-|. 8.3. Disassembly and assembly of the Traverse Unit 15 SA-AK52 Step 2 With lifti

43、ng the claw in the direction of arrow 1, draw the clamp SW P.C.B. in the direction of arrow 2. Step 3 Remove the mechanism cover. Step 4 Insert the gear with hexagonal wrench into the hole. Step 5 Rotate the hexagonal wrench in the direction of arrow (clockwise), and then open the disc tray fully. S

44、tep 6 Upset the CD changer unit again. Step 7 Release both the claws, and then draw the disc tray. Step 8 With forcing the left guide bar manually because the left guide bar interferes with claw, draw the disc tray. Installation of the disc tray after replacement 8.4. Disassembly and assembly of the

45、 Disc Tray 16 SA-AK52 Step 1 Slide the drive rack fully in the direction of the arrow. Step 2 Holding the drive rack, not to move, install the disc tray. Step 3 Align the drive rack with the drive gear. Step 4 Holding the disc tray manually, rotate the pulley gear in the direction of arrow. Step 5 R

46、otate the gear 5 or 6 times manually, and then push the disc tray. 17 SA-AK52 9 Self-Diagnostic Function 9.1. Self-diagnostic display This unit is equipped with a self-diagnostic display function which, if a problem occurs, will display an error code corresponding to the problem. Use this function w

47、hen performing maintenance on the unit. 9.2. How to enter the Self-Diagnostic Function 9.3. Cassette Mechanism Test (For error code H01, H02, H03, F01, F02) 1. Press “TAPE, DECK 1/2” to select Deck 2. 2. Load a cassette tape with the erasure prevention tab, remove from left side only and close the c

48、assette holder. 3. Press “FAST FORWARD MEMORY” (Tape will be stop after 2 seconds) 4. Load a cassette tape with the erasure prevention tab, remove from right side only and close the cassette holder. 5. Press “REVERSE FM MODE/BP” (Tape will be stop after 2 seconds) 6. Load a pre-recorded tape with bo

49、th side record tabs intact and close the cassette holder. 7. Press “PLAY/TUNE/TIME ADJ UP” (After TPS function, tape will stop automatically) 8. Press “REC/STOP” (Tape will not move) 9. Press “STOP/TUNE MODE” to indicate Error code. If several problem exist, error code will change each time when “I /TUNE MODE” is pressed. (e.g. H01 H03 F01 .etc.) 10. Press “TAPE, DECK 1/2” to select Deck 1. 11. Repeat step 2 to 9 to test Deck 1. (Tape Deck 1 will not check H02 because of n