Panasonic-SAAK22-cs-sm 电路图 维修手册.pdf

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1、I I AMPLIFIER SECTION Power output 10% Total harmonic distortion 70 Hz-16 kHz, both channels driven (LOW)60 W per channel (6 ) Power output 10% Total harmonic distortion 1 kHz, both channels driven (HIGH)70 W per channel (6 ) Input sensitivity AUX250 mV Input Impedance AUX13 k I I FM TUNER SECTION F

2、requency range87.9 - 107.9 MHz (200 kHz steps) 87.5 - 108.0 MHz (100 kHz steps) Sensitivity2.5 V (IHF) S/N 26 dB2.2 V Antenna terminal(s)75 (unbalanced) I I AM TUNER SECTION Frequency range520 - 1710 kHz (10 kHz steps) Sensitivity S/N 20 dB (at 1000 kHz)560 V/m 2001 Matsushita Electronics (S) Pte. L

3、td. All rights reserved. Unauthorized copying and distribution is a violation of law. SA-AK22 Colour (S). Silver Type Area (P). U.S.A. (PC). Canada TAPE SECTION : SG2 MECHANISM SERIES CD SECTION : RAE0152Z-3 TRAVERSE DECK SERIES I I CASSETTE DECK SECTION Track system4 track, 2 channel Heads Record/p

4、laybackSolid permalloy head ErasureDouble gap ferrite head MotorDC servo motor Recording systemAC bias 100 kHz Erasing systemAC erase 100 kHz Tape speed4.8 cm/s Frequency response (+3 dB, -6 dB at DECK OUT) HIGH (TYPE II)35 Hz - 14 kHz S/N50 dB (A weighted) Wow and flutter0.18 % (WRMS) Fast forward

5、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 laser/780 nm Number of channelsStereo Frequency response20 Hz - 20 kHz (+1, -2 dB) Wow and flutterBelow measurable limit Digital filter8 fs

6、CD Stereo System Specifications ORDER NO. MD0101009C1 A6 RadioFans.CN 收音机爱 好者资料库 D/A converterMASH (1 bit DAC) I I GENERAL Power supplyAC 120 V, 60Hz Power consumption155 W Dimensions (W x H x D)250 x 332 x 316 mm 9 27/32” x 13 1/16” x 12 7/16” Mass(7.6 kg) 16.8 lb I I SYSTEM 1 Safety Precaution 3 2

7、 Before Repair and Adjustment 4 3 Protection Circuitry 4 4 Accessories 4 5 Handling Precautions For Traverse Deck 5 6 Precaution of Laser Diode 6 7 Operation Procedures 7 8 Operation Checks and Main Component Replacement Procedures 9 9 Self-Diagnostic Function 19 10 Description of Error Code 20 SC-A

8、K22(P)Music Center: SA-AK22(P) Speaker: SB-AK22(P) SC-AK22(PC)Music Center: SA-AK22(PC) Speaker: SB-AK22(P) Notes: 1. Specifications are subject to change without notice. Mass and dimensions are aproximate. 2. Total harmonic distortion is measured by the digital spectrum analyzer. 11 CD Test Mode Fu

9、nction 21 12 Measurements and Adjustments 21 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 47 18 Wiring Connection Diagram 57 19 Troubleshooting Guide 58 20 Parts Location and Replacement Parts Li

10、st 59 CONTENTS Page Page 2 SA-AK22 RadioFans.CN 收音机爱 好者资料库 1 Safety Precaution (This “Safety Precaution” is applied only in U.S.A.) 1. Before servicing, unplug the power cord to prevent an electric shock. 2. When replacing parts, use only manufacturers recommended components for safety. 3. Check the

11、 condition of the power cord. Replace if wear or damage is evident. 4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc. 5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to pre

12、vent the customer from being exposed to a shock hazard. 1.1. Insulation Resistance Test 1. Unplug the power cord and short the two prongs of the plug with a jumper wire. 2. Turn on the power switch. 3. Measure the resistance value with ohmmeter between the jumper AC plug and each exposed metal cabin

13、et part, such as screwheads, antenna, control shafts, handle brackets, etc. Equipment with antenna terminals should read between 3 M and 5.2 M to all exposed parts*.(Fig.1) Equipment without antenna terminals should read approximately infinity to all exposed parts.(Fig.2) *Note: Some exposed parts m

14、ay be isolated from the chassis by design. These will read infinity. 4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be repaired and rechecked before it is returned to the customer. 3 SA-AK22 RadioFans.CN 收音机爱 好者资料库 2 Before Repai

15、r and Adjustment Disconnect AC power, discharge Power Supply Capacitors C536, C545 and C546 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

16、 a variac, to avoid overcurrent. Current consumption at AC 120V, 60 Hz in NO SIGNAL mode should be 400mA. 3 Protection Circuitry The protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when the power is turned on. Sound stops during a performan

17、ce. 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 used. If this occurs, follow the procedure outline

18、s 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 then on again. 4 Accessories Remote Control Trans

19、mitter FM indoor antenna AC mains lead AM Loop antenna 4 SA-AK22 5 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 human body. So, be careful of electrostatic breakdown

20、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. The short land between the No.4(LD) and No.5(GND) pins on the flexible board

21、 (FFC) is shorted with a solder build-up to prevent 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). 4. Do not turn the variable resistor (laser

22、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 where the

23、 traverse deck (optical pickup) is placed, 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 deck

24、 has a short point shorted with solder to protect the laer diode against electroststics breakdown. Be sure to remove the solder from the short point before making connections. 5 SA-AK22 6 Precaution of Laser Diode CAUTION: This unit utilizes a class 1 laser. Invisible laser radiation is emitted from

25、 the optical pickup lens. 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 pick up unit. 5. If the optical pick

26、 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 CONTROLS OR ADJUSTMENTS OR PERFORMANCE

27、 OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. 6 SA-AK22 7 Operation Procedures 7 SA-AK22 8 SA-AK22 Some chassis components may have sharp edges. Be careful when disassembling and servicing. Main Component Replacement Procedures 8 Operation Checks and Ma

28、in 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 procedures. Special reassemb

29、ly 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. 1. Replacement of the Traverse Deck. 2. Replacement of the Power Amplifi

30、er 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. 9 SA-AK22 Step 1 Remove 3 screws each side and 5 screws at rear panel. Step 2 Remove the Top Cabinet Step 3 R

31、emove T-bracket. Step 4 Remove 2 screws each side of the inner chassis and a screw at the rear panel. 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. 8.1. D

32、isassembly and assembly main unit 10 SA-AK22 Remove Front Panel Step 1 : Use a hexagonal wrench and 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

33、 two catches shown above to remove the front cabinet from the CD Traverse Unit. Separated front and rear panel assy. 11 SA-AK22 Removal of Inner bracket. 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, r

34、emove 4 screws. Step 1 Remove 2 screws each side. 8.1.1. Checking for Panel, Main and Deck P.C.B. 12 SA-AK22 8.1.2. Checking for Power P.C.B. 8.1.3. For Live Troubleshooting Procedure Step 6 : Reconnect all connectors. Step 7 : Use extension 14pin FFC wire for CN309. Step 8 : Supply power for troubl

35、eshooting. 13 SA-AK22 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 remo

36、ve the Traverse Deck. Step 5 Remove the flexible cable CN 701. 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. Insta

37、llation 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. 8.2. Main Component Replacement Procedures 14 SA-AK22 Note: Before installing the CD servo P.C.B., move the optical pickup towards the outer edge from the

38、marking (black triangle). Otherwise, the reset detect switch (S701) mounted on the CD servo P.C.B. may be damaged. 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 and CN304

39、and pull out the Main P.C.B. Step 5 Remove 4 screws fixed to the Power Amplifier IC. Step6 Unsolder the terminals of Power Amp IC and replace the respective component. 15 SA-AK22 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 leve

40、r in the direction of arrow 2. Step 3 Push the stpeer (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 arrow 1 as s

41、hown 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 position indic

42、ated I-I. 8.3. Disassembly and assembly of the Traverse Unit 16 SA-AK22 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 Rotate the hex

43、agonal 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. Step 8 With forcing the left guide bar manually because the left guide bar interfers with claw, draw the disc tr

44、ay. Installation of the disc tray after replacement 8.4. Disassembly and assembly of the Disc Tray 17 SA-AK22 Step 1 Slide the drive rack fully in the direction of arrow. Step 2 Holding the drive rack not to move, install the disc tray. Step 3 Align the drive rack with the driver gear. Step 4 Holdin

45、g 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. 18 SA-AK22 9 Self-Diagnostic Function 9.1. Self-diagnostic display This unit is equipped with a self-diagnostic display function which, if a problem

46、occurs, will display an error code corresponding to the problem. Use this function when 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 casse

47、tte 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. 5. Press “REVERSE

48、 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/TUNE MODE” to indi

49、cate 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) 19 SA-AK22 9.7. Power Amplifier Failure (F61) 10 Description of Error Code 9.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29, H15) 1. Press “CD”. 2. Press “OPEN/CLOSE (1