Panasonic SC-AK48 Service Manual
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Panasonic SC-AK48 Service Manual

Panasonic SC-AK48 Service Manual

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Specifications
AMPLIFIER SECTION
PMPO
RMS power output
THD 10%, both channels driven
Input sensitivity
AUX
MIC
Input inpedance
AUX
MIC
FM TUNER SECTION
Frequency range
Sensitivity
S/N 26dB
Antenna terminal (s)
AM TUNER SECTION
Frequency range
Sensitivity
S/N 20dB (at 999kHz)
3000W
(HIGH) 40W per channel (6Ω)
(MID) 40W per channel (6Ω)
(LOW) 120W per channel (6Ω)
(TOTAL) 200W per channel (6Ω)
250mA
0.7mV
13.9kΩ
680Ω
87.50 - 108.00MHz
(50kHz steps)
2.5µV (IHF)
2.2µV
75Ω (unbalanced)
552-1629kHz (9kHz steps)
520-1630kHz (10kHz steps)
560µV/m
SA-AK48
Colour
(S) ................. Silver Type
Areas
(GC) .............. Asia, Latin America,
Middle East and Africa.
TAPE SECTION : AR2 MECHANISM SERIES
CD SECTION : RAE0152Z-M TRAVERSE DECK
SERIES
SYSTEM :
SC-AK48
CASSETTE DECK SECTION
Track system
Heads
Record/playback
Erasure
Motor
Recording system
Erasing system
Tape speed
Frequency response (+3, -6dB) at DECK OUT
NORMAL (TYPE I)
HIGH (TYPE II)
S/N
Wow and flutter
Fast forward and rewind time
CD SECTION
Sampling frequency
Decoding
Beam source/wave length
Number of channels
Frequency response
Wow and flutter
Digital filter
© 2000 Matsushita Electric Industrial Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER No.MD0004060C3
CD Stereo System
4 track, 2 channel
Soild permalloy head
Double gap ferrite head
DC servo motor
AC bias 100kHz
AC erase 100kHz
35Hz - 14kHz
35Hz - 14kHz
50dB (A weighted)
0.18% (WRMS)
Approx. 120 seconds with
C-60 cassette tape
16 bit linear
Semiconductor laser/
20Hz - 20kHz (+1dB, -2dB)
Below measurable limit
Unauthorized
copying
4.8cm/s
44.1kHz
780nm
Stereo
8fs
and

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Summary of Contents for Panasonic SC-AK48

  • Page 1 Areas (GC) ....Asia, Latin America, Middle East and Africa. TAPE SECTION : AR2 MECHANISM SERIES CD SECTION : RAE0152Z-M TRAVERSE DECK SERIES SYSTEM : SC-AK48 Specifications AMPLIFIER SECTION CASSETTE DECK SECTION PMPO 3000W Track system 4 track, 2 channel...

  • Page 2: Table Of Contents

    Power consumption in standby 2. Total harmonic distortion is measured by the digital spectrum mode analyzer. Eco mode on 0.8W SYSTEM Eco mode off SC-AK48 : Main unit : SA-AK48 Dimensions (WxHxD) 270x331x338mm Speakers : SB-AK48 CONTENTS Page Page 1 Accessories...

  • Page 3: Accessories

    SA-AK48 1 Accessories 2 Before Repair 1. Turn off the power supply. Using a 10Ω, 10W resistor, current at 50Hz in NO SIGNAL mode should be shown connect both ends of power supply capacitors (C571 - 574, below with respect to supply voltage 230/230-240V. 558) in order to discharge the voltage.

  • Page 4: Handling Precautions For Traverse Deck

    SA-AK48 4 Handling Precautions for Traverse Deck The laser diodes 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).

  • Page 5: Precaution Of Laser Diode

    SA-AK48 5 Precaution of Laser Diode...

  • Page 6: Location Of Controls

    SA-AK48 6 Location of Controls...

  • Page 7: Location Of Controls For Remote Control Transmitter

    SA-AK48 7 Location of Controls for Remote Control Transmitter...

  • Page 8: Operation Checks And Component Replacement Procedures

    SA-AK48 8 Operation Checks and Component Replacement Procedures • This section describes procedures for checking the 8.1. Checking for the main P.C.B. operation of the major printed circuit boards and replacing the main components. • For reassembly after operation checks or replacement, reverse the respective procedures.

  • Page 9: Disassembly For The Cd Changer Ass'y

    SA-AK48 • Check the main P.C.B. as shown below. 8.2. Disassembly for the CD changer ass’y (The CD changer unit can be removed until the tray base ornament would removed.) 8.2.1. Disassembly for the disc tray ornament • Follow the (Step 1) - (Step 3) of item 8.1.
  • Page 10 SA-AK48 8.2.2. Disassembly for the CD changer unit • Follow the (Step 1) - (Step 3) of item 8.1. • Follow the disassembly instruction for the disc tray ornament of item 8.2.1.

  • Page 11: Checking For The Unit Operational Condition

    SA-AK48 8.3. Checking for the unit operational condition (Place the unit horizontally when loading the CD changer unit.) 8.3.1. Initial setting of CD unit • Follow the (Step 1) - (Step 3) of item 8.1. • Follow the disassembly instruction for the disc tray ornament of item 8.2.1.
  • Page 12 SA-AK48 8.3.2. Checking for the CD servo P.C.B. 8.3.3. Checking for the FL P.C.B. and cassette mechanism control P.C.B. • The initial setting of CD unit must be completed. (Refer to the initial setting of CD unit in item 8.3.1.) •...

  • Page 13: Replacement For The Traverse Deck Ass'y

    SA-AK48 8.3.4. Checking for the power supply P.C.B. • The initial setting of CD unit must be completed. (Refer to the initial setting of CD unit in item 8.3.1.) • Check the power supply P.C.B. as shown below. 8.4. Replacement for the traverse deck ass’y •...
  • Page 14 SA-AK48...
  • Page 15 SA-AK48...

  • Page 16: Replacement For The Disc Tray

    SA-AK48 8.5. Replacement for the disc tray • Follow the (Step 1) - (Step 3) of item 8.1. • Follow the disassembly instruction for the disc tray ornament of item 8.2.1. • Follow the disassembly instruction for the CD changer unit of item 8.2.2.
  • Page 17 SA-AK48...

  • Page 18: Disassembly And Reassembly For Mechanism Base Drive Unit

    SA-AK48 8.6. Disassembly and reassembly for mechanism base drive unit • Follow the (Step 1) - (Step 11) of item 8.1. • Follow the disassembly instruction for the disc tray ornament of item 8.2.1. • Follow the disassembly instruction for the CD changer unit of item 8.2.2.
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  • Page 24: Replacement For The Motor Ass'y

    SA-AK48 8.7. Replacement for the motor ass’y • Follow the (Step 1) - (Step 3) of item 8.1. • Follow the disassembly instruction for the disc tray ornament of item 8.2.1. • Follow the disassembly instruction for the CD changer unit of item 8.2.2.

  • Page 25: Replacement For The Pinch Roller Ass'y And Head Block

    SA-AK48 8.8. Replacement for the pinch roller ass’y and head block • Follow the (Step 1) - (Step 3) of item 8.1. • Follow the disassembly instruction for the disc tray ornament of item 8.2.1. • Follow the disassembly instruction for the CD changer unit of item 8.2.2.
  • Page 26 SA-AK48...

  • Page 27: Replacement For The Cd Motor Ass'y, Capstan Belt A, Capstan Belt B And Winding Belt

    SA-AK48 8.9. Replacement for the CD motor ass’y, capstan belt A, capstan belt B and winding belt • Follow the (Step 1) - (Step 3) of item 8.1. • Follow the disassembly instruction for the disc tray ornament of item 8.2.1. •...
  • Page 28 SA-AK48...

  • Page 29: Replacement For The Components Parts On The Mechanism

    SA-AK48 8.10. Replacement for the components parts on the mechanism P.C.B. • Follow the (Step 1) - (Step 3) of item 8.1. • Follow the disassembly instruction for the disc tray ornament of item 8.2.1. • Follow the disassembly instruction for the CD changer unit of item 8.2.2.

  • Page 30: Measure For Tape Trouble

    SA-AK48 8.12. Measure for tape trouble • Follow the (Step 1) - (Step 3) of item 8.1.

  • Page 31: Checking Procedure For Self-Operation Of Cassette

    SA-AK48 9 Checking Procedure for Self-operation of Cassette Mechanism Ass’y • This procedure describes simple methods independent of mechanism controller or governor circuit. 9.1. Operation Check Providing with Cassette Tape 1. Push up the EJECT lever with rubber band.(Refer to Fig. 2) 2.

  • Page 32: Self-Diagnostic Display Function

    SA-AK48 10 Self-Diagnostic Display Function Self-Diagnostic display Cassette Mechanism Test (For error code H01, H02, H03, F01, F02) This unit is equipped with a self-diagnostic display function which, if a problem occurs, will display an error code 1. Press “TAPE, DECK 1/2” to select Deck 2. corresponding to the problem.

  • Page 33: Description Of Error Code

    SA-AK48 11 Description of Error Code 11.1. Error Detection for Cassette Mechanism block Error Error Display Problem Condition MODE SW detection error Faulty operation of cassette mechanism. Faulty contact or short-circuit of mechanism mode switch (S951, S971) REC INH SW detection error Recording not possible.

  • Page 34: Cd Test Mode Function

    SA-AK48 12 CD Test Mode Function This CD test mode is provided to check CD unit without CD Automatic Alignment result indication connecting to changer loading mechanism. This mode shall Under CD test mode, pressing the numeric key ’0’ on the operate CD PLAY with CD unit being connected only and CD remote controller will display the auto adjustment result.

  • Page 35: Measurement And Adjustments

    SA-AK48 13 Measurement and Adjustments 13.1. Tuner Section 13.1.1. Measuring Instruments and Special Tools • AM signal generator (AM-SG) • EVM-AC (AC Electronic voltmeter) • EVM-DC (DC Electronic voltmeter) Fig.2 • Osciloscope 13.1.3. AM RF Adjustment • Choke coil (100µH) 1.

  • Page 36: Cassette Deck Section

    SA-AK48 13.2. Cassette Deck Section 13.2.1. Measuring Instruments and Special Tools • Digital frequency counter • EVM-AC (AC Electronic voltmeter) • Test tape QZZCFM : Head azimuth adjustment QZZCWAT : Tape speed adjustment QZZCRA : Normal reference blank tape QZZCRX : CrO2 tape Fig.6 13.2.2.
  • Page 37 SA-AK48 Standard value (CrO2) : 17±5mV 13.2.4. Bias OSC Frequency Adjustment (Deck 2) 1. Set the unit to “AUX” position. 2. Insert the Normal blank tape (QZZCRA) into DECK2 and set the unit to “REC” mode (use “ REC/STOP” key). 3.

  • Page 38: Illustration Of Ics, Transistors And Diodes

    SA-AK48 14 Illustration of ICs, Transistors and Diodes M5218AP BA7755A MN662790RSC AN8839NSBE2 28PIN BU2090AF-E2 16PIN LA1833NMNTLM 24PIN ..... . LC72131MDTRM 20PIN No.1 M51167AFP-TB...

  • Page 39: Schematic Diagram

    SA-AK48 15 Schematic Diagram • S974 15.1. Schematic Diagram Notes : Deck2 reverse side record prevention tab detect switch (R. REC. INH) • S975 • This schematic diagram may be modified at any time with : Deck2 forward side record prevention tab detect switch (F.

  • Page 40: Schematic Diagram

    SA-AK48 15.2. Schematic Diagram SCHEMATIC DIAGRAM-1 NOTE: The number which noted at the connectors on the schematic diagram as "SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2" indicates the schematic diagram serial number located on the left corner in the schematic diagram. CD SERVO CIRCUIT :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE 3.3V...
  • Page 41 SA-AK48 SCHEMATIC DIAGRAM-2 :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE 3.3V 3.3V TP18 TP20 TP23 R717 C727 50V1 PLAY C731 6.3V220 2.2V 1kHz, 0dB C730 TP21 R718 C728 50V1 3.2V 2.1V 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 F=16.9344MHz 3.2V BCLK...
  • Page 42 SA-AK48 SCHEMATIC DIAGRAM-3 :TAPE PLAYBACK SIGNAL LINE MECHANISM CONTROL CIRCUIT :POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE DECK1 CS1101 L ch PLAYBACK HEAD R ch C1193 1000P DECK2 Q1101 L ch ((0V)) 2SJ498CDTA CS1102 HEAD SELECT 0.1V R/P HEAD (REC:ON) ((0V)) ((4.4V)) R ch C1103...
  • Page 43 SA-AK48 SCHEMATIC DIAGRAM-4 :POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE :TAPE PLAYBACK SIGNAL LINE Q1107 DTC144TKA146 P.B EQ/REC EQ (CrO /H.SPEED) ((0V)):CrO ((0V)) ((0V)) C1123 1800P C1129 C1131 C1135 C1146 820P 820P 1000P 16V10 R1146 R1115 390K C1115 R1109 0.033 4.3K C1127 R1117 0.01...
  • Page 44 SA-AK48 SCHEMATIC DIAGRAM-5 :TAPE PLAYBACK SIGNAL LINE :POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE 14.6V R1151 C1165 16V10 Q1151,1152 ((10.6V)) DTC144TKA146 Q1153 SWITCHING (PLAY:ON) ((1.2V)) Q1115,1116 Q1151 2SD2114K1V ((0.5V)) ((0V)) MUTING R1152 C1166 0.7V ((4.0V)) ((0V)) 16V10 ((0.2V)) 0.2V Q1115 ((4.0V)) Q1154 0.1V ((10.6V))
  • Page 45 SA-AK48 SCHEMATIC DIAGRAM-6 :POSITIVE VOLTAGE LINE :RECORDING SIGNAL LINE :TAPE PLAYBACK SIGNAL LINE 14.6V H1100 Z1101 M.GND MO.GND +B(5) MAIN D.GND (DSC) +B(3) CIRCUIT R1144 Rch IN (CN304) on R1143 SCHEMATIC Lch IN DIAGRAM-9 A.GND Rch OUT Lch OUT TP10 CN1201 VREF(+) ADIN7...
  • Page 46 SA-AK48 SCHEMATIC DIAGRAM-7 :FM SIGNAL LINE :AM SIGNAL LINE MAIN(TUNER) CIRCUIT :POSITIVE VOLTAGE LINE :FM OSC SIGNAL LINE :AM OSC SIGNAL LINE FM FRONT END CIRCUIT 2SC2786MTA 2SK544F-AC FM MIXER 0.47 2.2P RF AMP 5.6P JK101 FM ANT R103 100K 680K 680K 4.7P...
  • Page 47 SA-AK48 SCHEMATIC DIAGRAM-8 :POSITIVE VOLTAGE LINE :FM SIGNAL LINE :AM SIGNAL LINE :AM OSC SIGNAL LINE R104 R106 CF202 470K (0V) CF201 C104 (0V) 1000P 0.7V Q106 KRA102MTA Q101 POWER SUPPLY LINE (FM:ON) 2SC2058SPTA (0V) FM IF AMP 14.6V 14.6V 14.6V (14.6V) IC101...
  • Page 48 SA-AK48 SCHEMATIC DIAGRAM- 9 :POSITIVE VOLTAGE LINE :TAPE PLAYBACK SIGNAL LINE :RECORDING SIGNAL LINE MAIN(DSC) CIRCUIT :FM SIGNAL LINE :AM SIGNAL LINE :CD PLAYBACK SIGNAL LINE :MIC SIGNAL LINE R401 JK305 FL CIRCUIT (CP605) L ch on SCHEMATIC DIAGURAM-15 R201 18 19 R ch CN303...
  • Page 49 SA-AK48 SCHEMATIC DIAGRAM-10 : RECORDING SIGNAL LINE :FM SIGNAL LINE :MIC SIGNAL LINE :NEGATIVE VOLTAGE LINE :AM SIGNAL LINE :TAPE PLAYBACK SIGNAL LINE :POSITIVE VOLTAGE LINE :CD SIGNAL LINE FL CIRCUIT(CP604) on SCHEMATIC DIAGRAM-15 C228 R225 R224 R248 R249 IC302 16V10 3.6K M5218AP...
  • Page 50 SA-AK48 SCHEMATIC DIAGRAM-11 :NEGATIVE VOLTAGE LINE :FRONT LOW SP DRIVE SIGNAL LINE :POSITIVE VOLTAGE LINE :CD SIGNAL LINE :FRONT MID/HIGHT SP DRIVE SIGNAL LINE D401 1SS355TE17 - 7.9V R434 C440 2.2K 50V3.3 C322 R336 R337 0.068 8.2K C435 R431 6800P C321 10V33 R444...
  • Page 51 SA-AK48 SCHEMATIC DIAGRAM-12 :MIC SIGNAL LINE OPERATION (1) CIRCUIT :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE R606 R609 R613 R617 R631 R638 R644 R649 R653 R656 6.8K 4.7K 2.7K 2.2K 1.8K 1.2K H603 R660 D611-615 SLR325MCT31W OPERATION (2) CIRCUIT S600 R605 R608 R611...
  • Page 52 SA-AK48 SCHEMATIC DIAGRAM-13 :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE Q602 KTA12710YTA POWER SUPPLY 8.5V 8.5V 8.5V 7.8V H602 R693 R663 R682 4.7K R662 (0V) 1.3V 3.6V 0.2V IC601 BU2090AF-E2 LED DRIVE R658 0.2V 4.4V 6.9V 6.9V 6.9V 6.9V 0.6V 5.1V D605 D604...
  • Page 53 SA-AK48...
  • Page 54 SA-AK48 SCHEMATIC DIAGRAM-15 :NEGATIVE VOLTAGE LINE :MIC SIGNAL LINE :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE FL600(RSL0295- F) D636 L605 MA4020LTA 100 H FL DISPLAY 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49...
  • Page 55 SA-AK48 SCHEMATIC DIAGRAM-16 :NEGATIVE VOLTAGE LINE :FRONT LOW SP DRIVE SIGNAL LINE POWER AMP CIRCUIT :POSITIVE VOLTAGE LINE :FRONT MID/HIGHT SP DRIVE SIGNAL LINE IC500 RSN311W64A-P POWER AMP(HIGH,MID,LOW) -28.5V 60.2V -30V 29.5V -0.2V 0.2V -29.7V 29.1V -60.7V R552 R502 R553 4.7K C500 470P...
  • Page 56 SA-AK48 SCHEMATIC DIAGRAM-17 :NEGATIVE VOLTAGE LINE :FRONT LOW SP DRIVE SIGNAL LINE :POSITIVE VOLTAGE LINE :FRONT HIGHT SP DRIVE SIGNAL LINE IC501 STK470-040 REGULATOR JK501 HIGHT 14.5V 9.8V 10.4V 5.1V -27.8V -8.5V -7.9V 7.7V 14.8V 16.0V 28.0V 60V 29.2V 0V -29.7V -60.7V R527 C544...
  • Page 57 SA-AK48 SCHEMATIC DIAGRAM-18 POWER TRANSFORMER CIRCUIT AC IN CIRCUIT Q976 2SD2144STA POWER SUPPLY D979 R985 R980 R981 T502 1D3E 10.4V 27.1V W500 CN500 8.9V R982 C979 820K 1000P Q977 2SC3940AQSTA Z501 POWER SUPPLY D981 C978 1D3E 0.01 5.8V 10.4V JK500 6.5V D984 1SS291TA...

  • Page 58: Printed Circuit Board Diagram

    SA-AK48 16 Printed Circuit Board Diagram Notes: This printed circuit board diagram may be modified at any time with the development of new technology. L10~12 are printed coils formed on the P.C.B. and thus not found in the replacement parts list. CD SERVO P.C.B.
  • Page 59 SA-AK48 MECHANISM CONTROL P.C.B. ELECTRICAL PARTS LOCATION Ref. Ref. Ref. Q1173 Q1171 Q1174 D1172 D1175 Q1179 R1174 MECHANISM CONTROL P.C.B. R1177 C1174 C1182 L1201 IC1101 R1126 C1104 IC1102 R1131 C1105 Q1175 IC1105 R1132 C1106 Q1101 R1133 C1108 Q1176 C1175 1 2 3 4 5 C1180 Q1102 R1188...
  • Page 60 SA-AK48 MAIN P.C.B. FM ANT AM ANT (LOOP) (GND) (EXT) C303 JK101 R112 C107 Z120 JK305 CN300 Z101 R230 D401 Q106 R103 R104 E C B C326 C441 C327 Q101 C102 C204 C436 C147 C125 C109 Z102 C104 R131 C402 C202 C442 C111...
  • Page 61 SA-AK48 FM FRONT END P.C.B. Ca A B C E Ca A Ca A B C E B C E (REP1998B) ELECTRICAL PARTS LOCATION Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref.
  • Page 62 SA-AK48 FL P.C.B. R600 R604 R629 S619 ( DISPLAY/ FL600 DEMO) 1 2 3 5 6 7 8 9 10 R951 R904 L605 R903 R908 R664 VR600 C615 R901 R676 R672 R906 R936 Q605 R668 R665 R699 R673 R905 R669 B C E R909 R666...
  • Page 63 SA-AK48 ELECTRICAL PARTS LOCATION Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. FL P.C.B. H602 IC600 S639 R699 C605 IC601 R700 C606 CN600 R642 IC602 CP604 R701 C607 IC603 C608 CP605 R900 R682 Q600 CP606...
  • Page 64 SA-AK48 ELECTRICAL PARTS LOCATION Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. MECHANISM P.C.B. (DECK 1) IC951 S951 S952...
  • Page 65 SA-AK48 OPERATION ( 1 ) P.C.B. OPERATION ( 2 ) P.C.B. 1 2 3 4 5 6 7 8 H603 ELECTRICAL PARTS LOCATION S603 DECK 1 OPEN) Ref. No. Lo. No. Ref. No. Lo. No. OPERATION (2) P.C.B. S604 D607 R605 (CD MANAGER) S601...
  • Page 66 SA-AK48 POWER AMP P.C.B. ELECTRICAL PARTS LOCATION D507 Ref. Ref. Ref. D503 C534 H501 D502 POWER AMP P.C.B. D509 IC500 R525 C505 IC501 R526 C506 Q500 R527 C507 Q501 R528 C508 Q516 D516 D518 Q502 R529 C509 B C E Q519 R551 Q503...
  • Page 67 SA-AK48 MOTOR P.C.B. AC IN P.C.B. CN500 (LOADING MOTOR) Z501 T502 F2 T2A (POWER TRANSFORMER) JK500 S501(VOLT ADJ) AC IN (110/127/220/230-240V 50/60Hz) PLUNGER (REPX0202C) (REP2578A-N) ELECTRICAL PARTS LOCATION Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. Ref.
  • Page 68 SA-AK48 POWER TRANSFORMER P.C.B. Q977 C981 R978 CN502 C980 D983 ELECTRICAL PARTS LOCATION C979 Ref. No. Lo. No. Ref. No. Lo. No. Q978 R982 POWER TRANSFORMER P.C.B. E C B Q976 E C B Q975 R980 Q976 C976 Q977 R981 Q975 Q978 R976...

  • Page 69: Block Diagram

    SA-AK48 17 Block Diagram CD CHANGER SECTION AN8839NSBE2 (RF) IC701 CD OPTICAL PICKUP TJ701 SERVO AMP SEMICONDUCTOR RFIN CSBRT LASER OFTR RFENV TENV DET. Q701 Vref. LASER OFTR POWER Vref. DRIVE DET. Vref. /RFDET /RFDET DET. FE IN A ch Vref.
  • Page 70 SA-AK48 : CD PLAYBACK SIGNAL LINE NOTE MCLK MCLK MDATA MDATA STAT STAT (To MAIN SECTION) SUBQ SUBQ MN662790RSC SQCK IC702 SQCK SERVO PROCESSOR / DIGITAL SIGNAL PROCESSOR BLKCK DIGITAL FILTER / D/A CONVERTER BLKCK RESTSW S701 (REST) 79 80 IOSEL OUTR BLKCK...
  • Page 71 SA-AK48 MAIN SECTION FM ANT AM ANT (FM FRONT END) Z101 Q1A,D1A CF201 RF AMP FM MIXER COIL COIL Q3,D3 BUFFER FM IF LOCAL Q101 LA1833NMNTLM CF202 IC101 +B(FM) FM / AM I F AMP, DET / AM OSC, MIX / FM MPX DECODER BUFF.
  • Page 72 SA-AK48 M51167AFP-TB TP9( TP10 Q1153(Q1154) IC1101 (1/2) P.B. EQ / TPS AMP BUFFER [ DECK 1 ] 36(1) PLAYBACK HEAD 33(4) 30(7) (L ch) 32(5) TP3( Q1103 (Q1104) [ DECK 2 ] 31(6) HEAD SELECT (PLAY:ON) HEAD Q1115 (L ch) (Q1116) Q1101(Q1102) MUTING...
  • Page 73 SA-AK48 (67) (59) (68) (To CD CHANGER SECTION) (69) CD P.B.signal (71) (70) (57) (66) Q304 Microcomputer SWITCH- Graphic interface equalizer M62433AFP IC303 DIGITAL SOUND CONTROLLER 9~20 (63) (62) (45~56) (44) (60) (58) (38) (39) (41) (42) (43) (37) FILTER VR601 (MIC VOLUME)
  • Page 74 SA-AK48 CR NETWORK 19 22 M5218AP IC302 BUFFER R ch M62456FPE1 IC301 BTL BASS BOOST +B10 +B10 +B10 +B10 D600~603, D604, D607 +B11 611~615 (TRI-AMP) (TAPE,CD, D605 (REC/PLAY TIMER, TUNER,S.WOOFER, (AC IN) CD1~5) AUX) 10~15 9~13 REC/PLAY TIMER, SW,AUX,TAPE, G1~5 TUNER,CD BU2090AF-E2 BU2090AF-E2...
  • Page 75 SA-AK48 HEADPHONES RSN311W64A-P R ch IC500 POWER AMP D519 POWER CONTROL Q510 CIRCUIT SWITCH- Q518(Q517) (25) H.P.F. HIGH Q511(Q514) (18) L.P.F. (12) SPEAKERS (6 ) (22) D515 POWER CONTROL/ PROTECTION CIRCUIT Q503,505 OVER LOAD DET. D517 Q500,507, +/-B1 +B4 520,521 Q502,508 POWER MOTOR...
  • Page 76 SA-AK48 STK470-040 IC501 REGULATOR S701 D526 (VOLT ADJ) T501 AC IN D520 D521 D503 REGULATOR LED9V D501,502 Q515 Q512 RL501 Z501 D314 RL502 RELAY Q519 DRIVE POWER SUPPLY D513 Q509 POWER SWITCH- Q516, SUPPLY D512,518 CONT. ACIN PCONT FL DISPLAY Q501, (FL600) D504,514,516...

  • Page 77: Troubleshooting Guide

    SA-AK48 18 Troubleshooting Guide...
  • Page 78 SA-AK48...

  • Page 79: Wiring Connection Diagram

    SA-AK48 19 Wiring Connection Diagram [DECK 1] [DECK 2] R/P HEAD, PLAYBACK HEAD AC IN ERASE HEAD AC IN P.C.B. 1 . . . 5 1 . . . 5 T502 (POWER 1 . 5 1 . 5 TRANSFORMER) CS1102 CS1101 3 .
  • Page 80 SA-AK48 SPEAKERS AM ANT FM ANT CP501 CN300 POWER AMP P.C.B. MAIN P.C.B. FM FRONT END P.C.B. FAN MOTOR CP303 CP500 CN301 BLACK CN309 13 ... 1 CN303 CN302 2 ..20 2 .

  • Page 81: Terminal Function Of Ics

    SA-AK48 20 Terminal Function of ICs 20.1. IC600 (M38199MF227): Terminal Function Name System Control and FL Driver GRD1 FL grid signal output GRD13 Terminal Function Name SEG32 FL segment signal output 1 CRT/SER4 CRT timer SEG4 TPS signal input Power supply (+5V) DECK1 Deck1 mechanism condition input SEG3...

  • Page 82: Ic703 (An8739Sbe2):Focus Coil/Tracking Coil/Traverse

    SA-AK48 Terminal Function Terminal Function Name Name GND terminal Power supply terminal Digital audio interface signal output BYTCK Byte clock signal (Not used, open) MCLK Command clock signal input /CLDCK Sub-code frame clock signal (Not used, open) MDATA Command data signal input FCLK Crystal frame clock (Not used, open) Command load signal input...

  • Page 83: Replacement Parts List

    SA-AK48 21 Replacement Parts List Notes: Ref. Part No. Part Name & Description Psc. Remarks • • Important safety notice : RYQ0290-S JOG CYLINDER UNIT 1 [M] Component identified mark have special RGL0486-Q DISC LIGHTING CHIP 1 [M] characteristics important safety. RGB0113-N PANA BADGE (HOOK TYP 1 [M]...
  • Page 84 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks TRAVERSE DECK RMQ0742 SPINDLE BASE 1 [M] RML0517 TIMING LEVER 1 [M] INTEGRATED CIRCUITS RML0516 PLUNGER LEVER 1 [M] RMB0551 UPPER SPINDLE SPRING 1 [M] TA7291P IC DRIVE...
  • Page 85 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks Q901 RVTDTC143EST TRANSISTOR 1 [M] D517 RK306LFU1 DIODE 1 [M] Q902 RVTDTC143EST TRANSISTOR 1 [M] D518 RVD1SS133TA DIODE 1 [M] Q903 RVTDTC143EST TRANSISTOR 1 [M] D519...
  • Page 86 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks S602 EVQ21405R SW AUX 1 [M] CN702 RJS1A6719-1Q 19P FFC CONNECTOR 1 [M] S603 EVQ21405R SW DECK 1 OPEN 1 [M] CN1201 RJS8T7ZA 8P MOLEX CONNECTOR...
  • Page 88 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks R226 ERJ6GEYJ101V 100 1/10W 1 [M] R424 ERJ6GEYJ183V 18K 1/10W 1 [M] R230 ERJ6GEYJ473V 47K 1/10W 1 [M] R425 ERJ6GEYJ362V 3.6K 1/10W 1 [M] R231 ERJ6GEYJ183V 18K 1/10W...
  • Page 89 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks R560 ERDS2TJ124T 120K 1/4W 1 [M] R634 ERDS2TJ102T 1K 1/4W 1 [M] R561 ERDS2TJ103T 10K 1/4W 1 [M] R635 ERDS2TJ472T 4.7K 1/4W 1 [M] R562 ERDS2TJ104T...
  • Page 90 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks R708 ERJ6GEYJ223A 22K 1/10W 1 [M] R950 ERDS2TJ223T 22K 1/4W 1 [M] R709 ERJ6GEYJ683A 68K 1/10W 1 [M] R951 ERDS2TJ103T 10K 1/4W 1 [M] R710 ERJ6GEYJ102V 1K 1/10W...
  • Page 91 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks R1153 ERJ6GEYJ122A 1.2K 1/10W 1 [M] C112 ECUV1H103KBN 0.01 50V 1 [M] R1154 ERJ6GEYJ122A 1.2K 1/10W 1 [M] C113 ECUV1H102KBN 1000P 50V 1 [M] R1155 ERJ6GEYJ221A 220 1/10W...
  • Page 92 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks C306 ECEA1HKA0R1B 0.1 50V 1 [M] C520 ECBT1C182KR5 1800P 16V 1 [M] C307 ECUZ1H102KBN 1000P 50V 1 [M] C521 ECKR1H103ZF5 0.01 50V 1 [M] C308 ECUZ1E473ZFN 0.047 25V...
  • Page 93 SA-AK48 Ref. Part No. Part Name & Description Psc. Remarks Ref. Part No. Part Name & Description Psc. Remarks C613 ECBT1H681KB5 680P 50V 1 [M] C721 ECUZ1H100DCN 10P 50V 1 [M] C614 ECBT1H681KB5 680P 50V 1 [M] C722 ECUZ1H100DCN 10P 50V 1 [M] C615 ECBT1H101KB5 100P 50V...

  • Page 95: Cabinet Parts Location

    SA-AK48 22 Cabinet Parts Location...
  • Page 96 SA-AK48...

  • Page 97: Mechanism Parts Location

    SA-AK48 23 Mechanism Parts Location...
  • Page 98 SA-AK48...

  • Page 99: Cd Mechanism Parts Location

    SA-AK48 24 CD Mechanism Parts Location...

  • Page 100: Packaging

    SA-AK48 25 Packaging...
  • Page 101 HIGH 6Ω Notes : 6Ω Specifications are subject to change without notice.Weight and dimensions are approximate. 6Ω System : SC-AK48 (GC) Music Center : SA-AK48 (GC) Input power Speaker : SB-AK48 (GC) HIGH 60W (Music) 60W (Music) © 2000 Matsushita Electronics (S) Pte. Ltd. All rights reserved.
  • Page 102 SB-AK48 1 Connection of the Speaker Cables • Be sure to connect speaker cables before connecting the AC power supply cord. • The load impedance of any speaker used with this unit must be 6Ω. • Be sure to connect the cable from the right speaker to the roght terminal and the cable from the left speaker to the left terminal.
  • Page 103 SB-AK48 3 Cabinet Parts Location Ref. No. Part No. Part Name & Description Remarks 4 Replacement Parts List RGQ0230-K CORD CLIPPER RMQ0941 BUSH TERMINAL Notes : RKA0072-KJ • Important safety notice : RMQ0938 PORT PACKING RYQ0296-S FRONT PANEL (L) Components identified mark have...
  • Page 104 SB-AK48 Ref. No. Part No. Part Name & Description Remarks XTB3+10G SCREW (EXTEND PORT) RGK0985B-H ORNAMENT CAP RKA0072-KJ RGQ0260-S PANEL SPACER RYQ0297-H ORNAMENT ASS’Y (L) RYQ0297A-H ORNAMENT ASS’Y (R) RGK0500-K DUST CAP RMR1208-K TWEETER SPACER REE0981 WIRE RMQ0931C CAB PACKING RMQ0931LK CABINET PACKING CAPACITORS...

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