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Panasonic SA-AK78 Service Manual
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Panasonic SA-AK78 Service Manual

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Specification
Amplifier Section
Front speaker power output
Power output
PMPO
RMS power output
THD 10%, both channels driven
Total
LOW 100 Hz
MID 1 kHz
HIGH 10 kHz
Power output in
Dolby Pro Logic mode
PMPO Total
RMS power output
THD 10%
Total
Front LOW 100 Hz
Front HIGH 1 kHz
Center 1 kHz
Surround 1 kHz
Input sensitivity
AUX 1, AUX 2
MIC
All manuals and user guides at all-guides.com
3400 W
200 W per channel (6Ω)
120 W per channel (6Ω)
40 W per channel (6Ω)
40 W per channel (6Ω)
4000 W
500 W
120 W per channel (6Ω)
40 W per channel (6Ω)
90 W per channel (8Ω)
45 W per channel (8Ω)
250 mV
0.7 mV
CD Stereo System
SA-AK78
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
Input impedance
AUX 1, AUX 2
MIC
FM Tuner Section
Frequency range
Sensitivity
S/N 26 dB
Antenna terminal(s)
AM Tuner Section
Frequency range
Sensitivity
S/N 20 dB
Cassette Deck Section
Track system
Heads
Record/playback
Erasure
Motor
Recording system
Erasing system
Tape speed
© 2000 Matsushita Electronics (S) Pte. Ltd. All rights
reserved. Unauthorized copying and distribution is a
violation of law.
ORDER NO. MD0005090C3
10 kΩ
600 Ω
87.50-108.00 MHz (50 kHz step)
1.8µV (IHF)
1.5µV
75 Ω unbalanced
522-1629 kHz (9kHz step)
520-1630 kHz (10kHz step)
500 µV/m
4 track, 2 channel
Solid permalloy head
Double gap ferrite head
DC servo motor
AC bias 100kHz
AC erase 100kHz
4.8 cm/s

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  • Page 1 All manuals and user guides at all-guides.com ORDER NO. MD0005090C3 CD Stereo System SA-AK78 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 Specification...

  • Page 2: Table Of Contents

    Wow and flutter Below measurable limit analyzer. Digit filter 8 fs System: SC-AK78 (GC) Music Center : SA-AK78 (GC) D/A converter MASH (1 bit DAC) Front Speaker : SB-AK78 (GC) General Center Speaker : SB-PC70 (GC) Surround Speaker : SB-PS70 (GC)

  • Page 3: Accessories

    All manuals and user guides at all-guides.com SA-AK78 • • No sound is heard when the 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 used.

  • Page 4: Handling Precautions For Traverse Deck

    All manuals and user guides at all-guides.com SA-AK78 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 during repair of the traverse deck (optical pickup).
  • Page 5 All manuals and user guides at all-guides.com SA-AK78 abgestrahlt. Wellenlänge : 780nm Maximale Strahlungsleistung der Lasereinheit :100W/VDE Die Strahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden: 1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefährlich ist.

  • Page 6: Operation Procedures

    All manuals and user guides at all-guides.com...
  • Page 7 All manuals and user guides at all-guides.com SA-AK78...

  • Page 8: Self-Diagnostic Display Function

    All manuals and user guides at all-guides.com SA-AK78 8 Self-Diagnostic Display Function 8.1. 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 when performing maintenance on the unit.

  • Page 9: Description Of Error Code

    All manuals and user guides at all-guides.com SA-AK78 9 Description of Error Code 9.1. Error detection for Cassette Mechanism block Error Error Problem condition Display MODE SW Faulty operation of cassette mechanism. detection error Faulty contact or short-circuit of mechanism mode switch (S951, S971).

  • Page 10: Cd Test Mode Function

    All manuals and user guides at all-guides.com SA-AK78 10 CD Test Mode Function This CD test mode is provided to check CD unit without connecting to changer loading mechanism. This mode shall operate CD PLAY with CD unit being connected only and CD Automatic Alignment result is shown on FL display.

  • Page 11: Measurements And Adjustments

    All manuals and user guides at all-guides.com SA-AK78 11 Measurements and Adjustments 11.1. Cassette Deck Section • • Measurement Condition − − Digital fre quency counter − − Reverse-mode seelctor switch: • • Test tape − − Tape edit: NORMAL −...
  • Page 12 All manuals and user guides at all-guides.com SA-AK78 11.1.3. Bias and Erase Voltage Check 1. Set the unit to “AUX” position. 2. Insert the Normal blank tape (QZZCRA) into DECK 2 and the unit to “REC” mode (use “ REC/STOP” key).

  • Page 13: Terminal Function Of Ic's

    All manuals and user guides at all-guides.com SA-AK78 12 Terminal Function of IC’s 12.1. IC701 (AN8839NSBE2) Servo Amplifier Pin No. Mark Function Pin No. Mark Function Tracking signal input 1 /RFDET NRFDET output (“L” : detection) Tracking signal input 2...
  • Page 14 All manuals and user guides at all-guides.com SA-AK78 Mark Function Mark Function EFM signal output CLVS Spindle servo phase synchronizing signal output PLL extraction clock output ("H" : CLV, "L" : rough servo) (fPCK = 4.321 MHz during normal playback)
  • Page 15 All manuals and user guides at all-guides.com SA-AK78 Mark Function MIC SW MIC detect SW input(L:NO MIC H:MIC) PHONE PHONE detect input (L:NO PHONE H:PHONE) SER7 Serial 7 output (EEPROM IC CS) SER6 Serial 6 output (DSP MPU CS) SER5...

  • Page 16: Block Diagram

    All manuals and user guides at all-guides.com SA-AK78 13 Block Diagram CD CHANGER SECTION • AN8839NSBE2 (RF) OPTICAL PICKUP IC701 TJ701 SERVO AMP SEMICONDUCTOR RFIN CSBRT LASER OFTR RFENV TENV Q701 DET. Vref. Laser OFTR power Vref. drive DET. Vref.
  • Page 17 All manuals and user guides at all-guides.com SA-AK78 MN662790RSC IC702 SERVO PROCESSOR / DIGITAL SIGNAL PROCESSOR DIGITAL FILTER / D/A CONVERTER 79 80 IOSEL CLVS OUTR BLKCK BLKCK R ch /CLDCK SBCK SUBC OUTL DEMPH SSEL FLAG SQCK SQCK IPFLAG...
  • Page 18 All manuals and user guides at all-guides.com SA-AK78 Note: : CD SIGNAL LINE CD P.B.signal M REQ M CS M CK To MAIN SECTION M SI M SO M RST X451 (8MHz) SW5V /RST MCLK M38503M4254F IC451 MDATA SYSTEM CONTROL...
  • Page 19 All manuals and user guides at all-guides.com SA-AK78 MAIN SECTION • FM ANT AM ANT +B(FM) RF AMP FM MIXER COIL COIL +B(FM) FM IF +B(FM) BUFFER LOCAL OSC +B(FM) LA1833MN FM / AM I F AMP, DET / AM OSC,...
  • Page 20 All manuals and user guides at all-guides.com SA-AK78 To Main section CD P.B.signal M51167AFP-TB Q1153 IC1101 (1/2) (Q1154) P.B. EQ / TPS AMP BUFFER [ DECK 1 ] 36(1) PLAYBACK TP9( TP10 HEAD 33(4) 30(7) (L ch) 32(5) Q1103 (Q1104)
  • Page 21 All manuals and user guides at all-guides.com SA-AK78 NJU7313AMT2 IC201 INPUT SELECTOR (26) (11) (28) (28) S.WOOFER (27) 4,13, 14,25, 26,39, GNDAL/R, (29) (25) 51,70, GNDAC, AUX2 M5218AFPE3 91,100 GNDASL/R, IC202 GNDR, GND, (24) (22) (98) BUFFER GNDX (RIN) TC9496F-012A...
  • Page 22 All manuals and user guides at all-guides.com SA-AK78 (28) AOSLT (AOSRT) SURROUND (98) (RIN) AOCT 4,13, 14,25, TC9496F-013A 26,39, GNDAL/R, IC802 51,70, GNDAC, DIGITAL SOUND 91,100 GNDASL/R, CONTROLLER GNDR, GND, GNDX 9,21, 30,38, (11) 54,62, AOLT VDAR, 86,95, (AORT) VDASC,...
  • Page 23 All manuals and user guides at all-guides.com SA-AK78 M5218AP IC203 BUFFER Q201 MUTING M5228FPE1 IC301 DRIVE BU4066BCF-E2 IC303 M5218AFPE3 M5218AFPE3 SWITCHING IC302 IC302 Q804 SUB WOOFER BUFFER BUFFER Q307 MUTING R ch Q305 Q803 SWITCH- Q203 Q202 MUTING MUTING CONT.
  • Page 24 All manuals and user guides at all-guides.com SA-AK78 HEADPHONES R ch RSN311W64A-P IC501 POWER AMP D202 Q503 SWITCHING (REMOTE) D601 POWER CONTROL CIRCUIT HIGH RLY505 (25) SPEAKERS (6 Ω) (22) D503 RLY503 (18) (12) SURROUND SPEAKERS (8 Ω) RLY504 POWER CONTROL/...
  • Page 25 All manuals and user guides at all-guides.com SA-AK78 Notes : CD SIGNAL LINE : FM SIGNAL LINE : FM OSC SIGNAL LINE : AM SIGNAL LINE : AM OSC SIGNAL LINE : TAPE PLAYBACK SIGNAL LINE : TAPE RECORDING SIGNAL LINE...

  • Page 26: Schematic Diagram

    All manuals and user guides at all-guides.com SA-AK78 14 Schematic Diagram (All schematic diagrams may be modified at any time with Tray open switch the development of new technology) CD offset detect switch Spindle bottom position detect switch Note : •...
  • Page 27 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-1 : + B Line : CD Signal Line CD SERVO CIRCUIT OPTICAL PICKUP PLAY CIRCUIT 0.6V C701 6.3V33 R701 C703 0.5us. 0.2V/DIV 6.3V100 Q701 2.7V Q701 3.2V LASER DIODE ((2.3V))
  • Page 28 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-2 : + B Line : CD Signal Line R717 C727 50V1 C725 1000P R721 C726 1000P R718 C728 50V1 C743 PLAY 2.2V CN702 Lch OUT 1KHz, 0dB A.GND C731 C753...
  • Page 29 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-3 :NEGATIVE VOLTAGE LINE :TAPE PLAYBACK SIGNAL LINE MECHANISM CIRCUIT :POSITIVE VOLTAGE LINE : RECORDING SIGNAL LINE 14.8V R1103 C1193 C1101 1000P 1000P R1102 Q1101 ((0V)) 100K ((4.2V)) 2SJ498CDTA DECK1 HEAD SELECT...
  • Page 30 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-4 :NEGATIVE VOLTAGE LINE :TAPE PLAYBACK SIGNAL LINE :POSITIVE VOLTAGE LINE : RECORDING SIGNAL LINE 14.8V C1133 50V4.7 Q1107 DTC144TKA146 P.B EQ/ REC EQ (CrO / H.SPEED) R1121 ((4.8V)):CrO ((0V)) ((0V))
  • Page 31 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-5 :NEGATIVE VOLTAGE LINE :TAPE PLAYBACK SIGNAL LINE MECHANISM CIRCUIT :POSITIVE VOLTAGE LINE : RECORDING SIGNAL LINE 14.8V R1106 2.2K Q1151,1152 DTC144TKA146 R1151 C1165 SWITCHING(PLAY:ON) 16V10 ((8.8V)) ((2.6V)) 0.1V Q1153 ((0V)) ((3.8V))
  • Page 32 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-6 :NEGATIVE VOLTAGE LINE :TAPE PLAYBACK SIGNAL LINE :POSITIVE VOLTAGE LINE : RECORDING SIGNAL LINE 14.8V H1100 M.GND MO.GND MO +B 14.2V MAIN CIRCUIT D.GND R1144 (CN100) +B(3) on SCHEMATIC Rch IN...
  • Page 33 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-7 :MIC SIGNAL LINE OPERATION(1) CIRCUIT :POSITIVE VOLTAGE LINE R930 R929 R928 R927 R926 R925 R924 R923 R922 R921 6.8K 4.7K 2.7K 2.2K 1.8K 1.2K H603B H603A Q608 D615-619 2SB621ARSTA SLR325MCT31W POWER SUPPLY 6.8V...
  • Page 34 All manuals and user guides at all-guides.com SA-AK78...
  • Page 35 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-9 :MIC SIGNAL LINE :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :CD SIGNAL LINE -28.4V FL601(RSL0296-F) FL DISPLAY 5 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...
  • Page 36 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-10 :POSITIVE VOLTAGE LINE LOADING MOTOR CIRCUIT TA7291P MOTOR DRIVE 0.01 CLAMP SW (LOADING MOTOR) CIRCUIT MTZJ4R7BTA PLUNGER (CLAMP) (TRAY POSITION 2 DET.) (TRAY POSITION 1 DET.) BOTTOM SW (OPEN DET.)
  • Page 37 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-11 :MIC SIGNAL LINE MAIN CIRCUIT :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :CD SIGNAL LINE R213 JK202 R225 R227 2.7K C201 R229 4.7K 0.01 FRONT C235 R233 4.7K R214 -7.7V R217 JK202 8.2K...
  • Page 38 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-12 :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :CD SIGNAL LINE IC453 TC74HCT7007A INTERFACE 4.7V 3.2V C452 0.01 3.2V R471 R467 R489 R473 R474 5.1V R470 1.5K R468 100K R475 R476 R477 C453 0.022...
  • Page 39 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-13 :MIC SIGNAL LINE MAIN CIRCUIT :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :CD SIGNAL LINE R406 R440 DOK2 DSP2 DSP1 R420 CNVss EXP11 4.9V RESET EXP12 DRST2 EXP13 P40 NC 2.3V...
  • Page 40 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-14 :SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE R841 R840 R811 100K R827 4.7K C893 R833 0.022 4.7K...
  • Page 41 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-15 :NEGATIVE VOLTAGE LINE :SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE MAIN CIRCUIT :POSITIVE VOLTAGE LINE :CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE R890 R861 100K R828 4.7K C895 R883 0.022...
  • Page 42 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-16 :SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE C262 R268 R270 50V4.7 3.3K 7.7V R266 -5.3V -5.3V -5.3V...
  • Page 43 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-17 :NEGATIVE VOLTAGE LINE :SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE MAIN CIRCUIT :POSITIVE VOLTAGE LINE :CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE C330 R337 JK204 16V10 SUB WOOFFER R332...
  • Page 44 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-18 :NEGATIVE VOLTAGE LINE :SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE POWER CIRCUIT :POSITIVE VOLTAGE LINE :CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE IC501 RSN311W64A-P POWER AMP(HIGH,MID,LOW) -65V 64.6V -32.1V 31.6V 0V...
  • Page 45 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-19 :NEGATIVE VOLTAGE LINE :SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE :POSITIVE VOLTAGE LINE :CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE IC502 RSN35H1 POWER AMP(CENTER) JK501 RLY504 HIGHT MUTE LATCH -15.3V -4.2V...
  • Page 46 All manuals and user guides at all-guides.com SA-AK78 SCHEMATIC DIAGRAM-20 :NEGATIVE VOLTAGE LINE :POSITIVE VOLTAGE LINE AC TRANS CIRCUIT CN501 SYNC FL CIRCUIT(H602) on SCHEMATIC DIAGRAM-9 / ECO SYS5.8V 5.8V Q593 KTC3199GRTA REGULATOR 5.8V 10.4V 6.4V D597 R596 RVD1SS133TA 820K...

  • Page 47: Printed Circuit Board

    All manuals and user guides at all-guides.com SA-AK78 15 Printed Circuit Board CD SERVO P.C.B (REPX0192A) (RF) TP20 X701 TJ701 TP23 C717 R714 TP19 TP21 C716 TP29 C721 C744 R709 TP24 C722 R712 TP18 C723 C724 R742 C725 TP25 IC701...
  • Page 48 All manuals and user guides at all-guides.com SA-AK78 DECK P.C.B (PCI-DECK78-MONT)
  • Page 49 All manuals and user guides at all-guides.com SA-AK78 MECHANISM (DECK 1) P.C.B (REPX0108A) S953 CS951 S951 S952 D951 IC951 SOLENOID MECHANISM (DECK 2) P.C.B (REPX0108) S973 Z971 CS971 1 2 3 4 5 6 7 8 9 S971 S975 S974...
  • Page 50 All manuals and user guides at all-guides.com SA-AK78 PANEL P.C.B. (AK78-PCI-PAINEL-MONT) R623 S611 RANDOM C630 C631 C634 IC602 R699 FL DISPLAY VOLUME R685 R686 S613 1 2 3 17 19 22 23 25 27 30 32 34 36 38 40 42 44 4...
  • Page 51 All manuals and user guides at all-guides.com SA-AK78 S602 S601 POWER R613 J768 R614 J763 R615 TUNER SENSOR R616 4 36 38 40 42 44 46 49 51 53 TAPE D607 IC603 R617 AUX1/2 J773 S606 C602 J633 C601 R619...
  • Page 52 All manuals and user guides at all-guides.com SA-AK78 OPERATION (2) P.C.B (REP2934B) VR602 S649 JOG PULSE ENCODER D630 D623 D632 D622 1 2 3 4 5 6 7 8 910 S648 S646 S645 S647 LOWCH TRICONT MIDCH S642 HICH STOP...
  • Page 53 All manuals and user guides at all-guides.com SA-AK78 MAIN P.C.B (AK78-MAIN-MONT) FRONT SURROUND SPEAKERS WOOFER SPEAKERS AUX2 AUX1 R202 C266 R268 C264 IC203 R276 Q307 R272 Q201 R250 R241 R243 J171 C235 4 5 6 C326 R225 C263 C265 R245...
  • Page 54 All manuals and user guides at all-guides.com SA-AK78 POWER P.C.B (AK78-PCI-POWER-MONT) FRONT SURROUND/CENTER SPEAKERS SPEAKERS R-CHANNEL L-CHANNEL R521 JK503 R522 SUR_R SUR_L CENTER C521 R537 R511 C502 R508 J501 R503 C511 R517 C512 J504 R518 J536 R527 J534 R528 C509...
  • Page 55 All manuals and user guides at all-guides.com SA-AK78 STABILIZER P.C.B. (REP2937B)
  • Page 56 All manuals and user guides at all-guides.com SA-AK78 AC TRANSFORMER P.C.B (AK78-PCI-TRAFO-MONT) T501 (POWER TRANSFORMER) BLK/OR D500 W500 C592 Q591 D591 R594 C597 C595 PRIMARY D595 R593 D592 SECONDARY C598 D599 Q594 Q593 D554 D597 C591 D553 D551 R591 R599...

  • Page 57: Wiring Connection Diagram

    All manuals and user guides at all-guides.com SA-AK78 16 Wiring Connection Diagram...
  • Page 58 All manuals and user guides at all-guides.com SA-AK78...

  • Page 59: Troubleshooting Guide

    All manuals and user guides at all-guides.com SA-AK78 17 Troubleshooting Guide...

  • Page 60: Parts Location And Replacement Parts List

    All manuals and user guides at all-guides.com SA-AK78 18 Parts Location and Replacement Parts List Notes: • • Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardent (resistors), high-quality sound (capacitors), low noise (resistors), etc are used.
  • Page 61 All manuals and user guides at all-guides.com SA-AK78 18.1. Mecanismo do Deck Montado: RD-JMD034-Z 18.1.1. Deck Mechanism Parts Location...
  • Page 62 All manuals and user guides at all-guides.com SA-AK78...
  • Page 63 All manuals and user guides at all-guides.com SA-AK78 18.1.2. Deck Mechanism Parts List Ref. Part No. Part Name & Description Remarks RMM0131 BRAKE ROD Ref. Part No. Part Name & Description Remarks RMM0133-1 EJECT ROD RMQ0519 REEL HUB CASSETTE DECK...
  • Page 64 All manuals and user guides at all-guides.com SA-AK78 18.2. CD Loading Mechanism (RD-DAC024-Z) 18.2.1. CD Loading Mechanism Parts Location...
  • Page 65 All manuals and user guides at all-guides.com...
  • Page 66 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks 18.2.2. CD Mechanism Parts List RMX0140 DISC SPACER Ref. Part No. Part Name & Description Remarks RME0261 FRONT LOCK SPRING RMQ0742 SPINDLE BASE TRAVERSE DECK...
  • Page 67 All manuals and user guides at all-guides.com SA-AK78 18.3. Cabinet 18.3.1. Cabinet Parts Location...
  • Page 68 All manuals and user guides at all-guides.com SA-AK78...
  • Page 69 All manuals and user guides at all-guides.com...
  • Page 70 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks Q384 2SC2412KT96R TRANSISTOR D386 UDZSTE175R1B DIODE Q385 DTA114EKA146 TRANSISTOR D451 RL1N4003N02 DIODE Q451 2SB621ARSTA TRANSISTOR D453...
  • Page 71 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D658 MTZJ4R7BTA DIODE S953 RSH1A019-2U SW LEAF D665 RVD1SS133TA DIODE S971 RSH1A018-3U LEAF SWITCH D666 RVD1SS133TA...
  • Page 72 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks W500 REXX0206 STANDBY BY WIRE COMPONENT COMBINATION W502 REX1003 12P WIRE UNIT W506 REX1004 10P WIRE UNIT...
  • Page 73 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R258 ERJ6GEYJ102V 1K 1/10W R358 ERJ6GEYJ563V 56K 1/10W R259 ERJ6GEYJ103V 10K 1/10W R359 ERDS1FVJ180T 18 1/2W...
  • Page 74 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R459 ERJ6GEYJ272V 2.7K 1/10W R550 ERDS2TJ563T 56K 1/4W R460 ERJ6GEYJ272V 2.7K 1/10W R551 ERDS2TJ334T 330K 1/4W...
  • Page 75 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R627 ERDS2TJ222T 2.2K 1/4W R727 ERJ6GEYJ392A 3.9K 1/10W R628 ERDS2TJ272T 2.7K 1/4W R728 ERJ6GEYJ392A 3.9K 1/10W...
  • Page 76 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R865 ERJ6GEYJ222V 2.2K 1/10W R961 ERDS2TJ102T 1K 1/4W R866 ERJ6GEYJ223V 22K 1/10W R962 ERDS2TJ122T 1.2K 1/4W...
  • Page 77 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R1167 ERJ6GEYJ470A 47 1/10W C267 ECUV1H102KBN 1000P 50V R1170 ERJ6GEYJ102A 1K 1/10W C268 ECUV1H102KBN 1000P 50V...
  • Page 78 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C506 ECBT1H471KB5 470P 50V C614 ECEA1HKA2R2B 2.2 50V C507 ECBT1H180JC5 18P 50V C615 ECBT1H150JC5 15P 50V...
  • Page 79 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C732 ECEA0JKA221I 220 6.3V C856 ECEA1HKAR47B 0.47 50V C733 ECUZ1E104MBN 0.1 25V C857 ECUVNE104KBN 0.1 25V...
  • Page 80 All manuals and user guides at all-guides.com SA-AK78 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C1134 ECEA1HKA4R7B 4.7 50V RJ704 ERJ8GEY0R00A 0 1/8W C1135 ECUZ1H102KBN 1000P 50V RJ707 ERJ8GEY0R00A 0 1/8W...
  • Page 81 6Ω Specifications are subject to change without notice. 6Ω Weight and dimensions are approximate. 6Ω System : SC-AK78 (GC) Music Center : SA-AK78 (GC) Input power Front Speaker : SB-AK78 (GC) HIGH 60W (Music) Center Speaker : SB-PC70 (GC) 60W (Music)
  • Page 82 All manuals and user guides at all-guides.com SB-AK78 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.
  • Page 83 All manuals and user guides at all-guides.com SB-AK78 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)
  • Page 84 All manuals and user guides at all-guides.com SB-AK78 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...

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