Panasonic-SAAK18-cs-sm 电路图 维修手册.pdf

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1、I I AMPLIFIER SECTION (GC area) PMPO1400 W RMS power output THD 10%, both channels driven70 W per channel (6 ) Input sensitivity AUX250 mV MIC0.7 mV Input Impedance AUX13.9 k MIC680 I I AMPLIFIER SECTION (GN area) RMS power output THD 10%, both channels driven60 W per channel (6 ) Input sensitivity

2、AUX250 mV Input Impedance AUX13.9 k 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) 2000 Matsushita Electronics (S) Pte Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. SA

3、-AK18 Colour (S). Silver Type Area (GC).Asia, Latin America, Africa and Middle Near East (GN).Oceania TAPE SECTION : AR2 MECHANISM SERIES CD SECTION : RAE0152Z-3 TRAVERSE DECK SERIES I I AM TUNER SECTION (GC area) Frequency range MW522 - 1629 kHz (9 kHz steps) 520 - 1630 kHz (10 kHz steps) SW3.200 -

4、 7.350 MHz (0.005 MHz steps) 9.400 - 21.750 MHz (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 AM TUNER SECTION (GN area) Frequency range522 - 1629 kHz (9 kHz steps) Sensitivity S/N 20 dB (at 999 kHz)560 V/m I I CASSETTE DECK SECTION Track system

5、4 track, 2 channel Heads Record/playbackSolid permalloy head ErasureDouble gap ferrite head MotorDC servo motor CD Stereo System Specifications ORDER NO. MD0004055C3 RadioFans.CN 收音机爱 好者资料库 Recording systemAC bias 100 kHz Erasing systemAC erase 100 kHz Tape speed4.8 cm/s Frequency response (+3 dB, -

6、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 C-60 cassette tape I I CD SECTION Sampling frequency44.1 kHz Decoding16 bit linear Beam source/wave lengthSemiconductor

7、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 DAC) I I GENERAL (GC area) Power supplyAC 110 V/127 V/220 V/230-240V, 50/60 Hz Power consumption155 W 1 Before Repair and Adjustment 3

8、2 Protection Circuitry 3 3 Accessories 3 4 Handling Precautions For Traverse Deck 4 5 Precaution of Laser Diode 4 6 Operation Procedures 6 7 Operation Checks and Main Component Replacement Procedures 8 8 Self-Diagnostic Function 15 9 Description of Error Code 16 Power consumption in standby mode Eco

9、 mode on0.8 W Eco mode off12 W Dimensions (W x H x D)270 x 330 x 310 mm Weight7.4 kg I I GENERAL (GN area) Power supplyAC 230-240V, 50 Hz Power consumption152 W Power consumption in standby mode Eco mode on0.4 W Eco mode off12 W Dimensions (W x H x D)270 x 330 x 310 mm Weight6.9 kg I I SYSTEM SC-AK1

10、8 (GC)Music Center: SA-AK18 (GC) Speaker: SB-AK18 (GC) SC-AK18 (GN)Music Center: SA-AK18 (GN) Speaker: SB-AK18 (GC) Notes: 1. Specifiacations are subject to change without notice. Weight and dimensions are approximate. 2. Total harmonic distortion is measured by the digital spectrum analyzer. 10 CD

11、Test Mode Function 17 11 Measurements and Adjustments 17 12 Illustration of ICs, Transistors and Diodes 21 13 Terminal Function of ICs 22 14 Block Diagram 25 15 Schematic Diagram 33 16 Printed Circuit Board 60 17 Wiring Connection Diagram 73 18 Troubleshooting Guide 74 19 Parts Location and Replacem

12、ent Parts List 75 CONTENTS Page Page 2 SA-AK18 RadioFans.CN 收音机爱 好者资料库 3 Accessories Remote Control Transmitter FM indoor antenna AC mains lead (GC) AC mains lead (GN) Power plug adapter (GC) AM Loop antenna 1 Before Repair and Adjustment Disconnect AC power, discharge Power Supply Capacitors C536,

13、C545, C546, C548 and C555 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. For GC Current consumption at AC

14、 110 V, 240 V, 50 Hz in NO SIGNAL mode should be 620mA ,300mA respectively. For GN Current consumption at AC 240 V, 50 Hz in NO SIGNAL mode should be 200mA. 2 Protection Circuitry The protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when the

15、 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 are

16、 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 and

17、 then on again. 3 SA-AK18 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 G

18、 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 preven

19、t 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. G

20、 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, and

21、 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 prot

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

23、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. 2. Do not a

24、djust 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 Laserstrahlung

25、von der Lasereinheit abgestrahlt. Wellenlnge : 780nm 4 SA-AK18 I I Use of Caution Labels 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 freigel

26、egten Laserdiode gefhrlich 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 U

27、TILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. 5 SA-AK18 6 Operation Procedures 6 SA-AK18 7 SA-AK18 Some chassis components may have sharp edges. Be careful when disassembling and servicing. M

28、ain Component Replacement Procedures 7.1.1. Checking of the Main, Panel, Deck and Power P.C.B. Step 1 Remove the Top Cabinet. Step 2 Push the lever in the direction of the arrow. Step 3 Pull out the CD tray as shown and remove the CD lid. Push back the CD tray after the CD lid has been removed. 7 Op

29、eration 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 procedu

30、res. Special reassembly procedures are described only when required. 3. Select items from the following index when checks or replacement are required. Contents Checking Procedure for each major P.C.B. 1. Checking of the Main, Panel, Deck and Power P.C.B. 1. Replacement of the Traverse Deck. 2. Repla

31、cement 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 Lasereinheit darf nur gegen eine vo

32、m Hersteller speczifizierte Einheit ausgetauscht werden. 7.1. Checking Procedure for each major P.C.B. 8 SA-AK18 Step 5 Remove the wire at CP605 and CN309. Step 6 Release the 2 catches and remove the CD changer base together with the CD changer. Checking for Main, Panel and Deck P.C.B Checking for P

33、ower P.C.B. 9 SA-AK18 7.2.1. Replacement of the Traverse Deck Step 1 Follow the procedures in Disassembly 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

34、 remove the Traverse Deck. Step 5 Remove the flexible cable CN701. Removal of the flexible cable. Push 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. I

35、nstallation of the CD servo P.C.B. after replacement Step 1 Connect the FFC board. Step 2 Install the CD servo P.C.B. in the traverse deck assembly. 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 det

36、ect switch (S701) mounted on the CD servo P.C.B. may be damaged. 7.2. Main Component Replacement Procedures 10 SA-AK18 7.2.2. Replacement of the Power Amplifier IC 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 an

37、d CN304 and pull out the Main PCB. Step 5 Remove the 4 screws fixed to the Power Amplifier IC. Step 6 Unsolder the terminals of Power Amp IC and replace the respective component. 11 SA-AK18 Step 1 Push the lever from position A to B. Step 2 Pull the stopper (black) in the direction of arrow 1 and pu

38、sh the lever in the direction of arrow 2. Step 3 Push the stopper (black) down until the white lever 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

39、arrow 1 as shown and push the traverse unit into the position in the direction of arrow 2. Step 3 Pull 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 po

40、sition indicated |-|. 7.3. Disassembly and assembly of the Traverse Unit 12 SA-AK18 Step 2 With lifting 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 Ro

41、tate the hexagonal wrench in the direction of arrow (clockwise), and then open the disc tray fully. Step 6 Upset the CD changer unit again. Step 7 Release both the claws, and then draw the disc tray. 7.4. Disassembly and assembly of the Disc Tray 13 SA-AK18 Step 8 With forcing the left guide bar man

42、ually because the left guide bar interferes with claw, draw the disc tray. Installation of the disc tray after replacement 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 ge

43、ar. Step 4 Holding the disc tray manually, rotate the pulley gear in the direction of arrow. Step 5 Rotate the gear 5 or 6 times manually, and then push the disc tray. 14 SA-AK18 8 Self-Diagnostic Function 8.1. Self-diagnostic display This unit is equipped with a self-diagnostic display function whi

44、ch, if a problem occurs, will display an error code corresponding to the problem. Use this function when performing maintenance on the unit. 8.2. How to enter the Self-Diagnostic Function 8.3. Cassette Mechanism Test (For error code H01, H02, H03, F01, F02) 1. Press “TAPE, DECK 1/2” to select Deck 2

45、. 2. Load a cassette tape with the erasure prevention tab, remove from left side only and close the cassette 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.

46、5. Press “REVERSE FM MODE/BP” (Tape will be stop after 2 seconds) 6. Load a pre-recorded tape with both 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/T

47、UNE 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 no recording function)

48、8.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29, H15, F75) 1. Press “CD”. 2. Press “OPEN/CLOSE (1)” and place a CD. 3. Press “OPEN/CLOSE (1)” to close the tray. 15 SA-AK18 8.7. Power Amplifier Failure (F61) 9 Description of Error Code 4. Press “OPEN/CLOSE (5)” and wait until the tray is op

49、en. 5. Press “OPEN/CLOSE (1)” and remove the CD. 6. Press “OPEN/CLOSE (1)” to close the tray. 7. Press “I/TUNE MODE” to indicate Error Code. If several problem exist, error code will change each time when “I/TUNE MODE” is pressed. (e.g. F15 F26 F16 .etc). 8.5. To clear all Error code 1. Press “STOP/TUNE MODE” button for 5 seconds. 2. FL indicator shows “CLEAR” for 1 second and change to “T”. 8.6. How to get out from Self-Diagnostic function 1. P