Technics SU-A909 Service Manual
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Technics SU-A909 Service Manual

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Table Of Contents
Service Manual
COVER
1 Note
TOP NEXT
2 Location of Controls
3 To Supply Power Source
AD9907176C2
3.1 Power Supply to Main
Circuit
3.2 Operation Check
4 Operation Checks and
Component
ReplacementProcedures
5 Type Illustration of ICs,
Transistors and Diodes
Control Amplifier
6 Schematic Diagram
6.1 Schematic Diagram
SU-C909U
Notes
6.2 Schematic Diagram
Colour
7 Printed Circuit Board
Diagram
(K)..........Black Type
8 Block Diagram
9 Wiring Connection
Area
Diagram
10 Measurements and
(E)..........Europe and Russia.
Adjustments
10.1 Measurement
instruments and Special tools
10.2 Output Voltage
Adjustment
11 Terminal Function of
ICs
11.1 IC701
(M38503M2404F) : Micro
Computer
12 Replacement Parts List
PV
13 Cabinet Parts Location
PV
14 Packaging

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Summary of Contents for Technics SU-A909

  • Page 1 Table Of Contents Service Manual COVER 1 Note TOP NEXT 2 Location of Controls 3 To Supply Power Source AD9907176C2 3.1 Power Supply to Main Circuit 3.2 Operation Check 4 Operation Checks and Component ReplacementProcedures 5 Type Illustration of ICs, Transistors and Diodes Control Amplifier 6 Schematic Diagram...
  • Page 2 © 1999 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. •@ TOP NEXT...

  • Page 3: Table Of Contents

    Table Of Contents COVER 1 Note 2 Location of Controls 3 To Supply Power Source 3.1 Power Supply to Main Circuit 3.2 Operation Check 4 Operation Checks and Component ReplacementProcedures 5 Type Illustration of ICs, Transistors and Diodes 6 Schematic Diagram 6.1 Schematic Diagram Notes 6.2 Schematic Diagram 7 Printed Circuit Board Diagram...
  • Page 4 12 Replacement Parts List 13 Cabinet Parts Location 14 Packaging...
  • Page 5 Service Manual TOP NEXT AD9907176C2 Control Amplifier SU-C909U Colour (K)..Black Type Area (E)..Europe and Russia.
  • Page 6 © 1999 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. •@ TOP NEXT...

  • Page 7: Note

    1 Note TOP PREVIOUS NEXT Refer to the servise manual for Model No. SE-A909S (ORDER No. AD9907177C2) for information on Accessories, Connections, Operations and Packaging. •@ TOP PREVIOUS NEXT...

  • Page 8: Location Of Controls

    2 Location of Controls TOP PREVIOUS NEXT...
  • Page 9 •@ TOP PREVIOUS NEXT...

  • Page 10: To Supply Power Source

    3 To Supply Power Source TOP PREVIOUS NEXT This unit SU-C909U is designed to operate on power supplied from the Power Amplifier SE-A909S. When operating the unit SU-C909U alone for testing and servicing, without having power supplied from the Power Amplifier SE-A909S, use the following method. 3.1 Power Supply to Main Circuit 3.2 Operation Check •@...

  • Page 11: Power Supply To Main Circuit

    3.1 Power Supply to Main Circuit TOP PREVIOUS NEXT 1. Apply 10 V AC power to the section between the point and the point . Shown in Fig.1 2. Connect the DC+12 V to+15 V (more than 0.1 A) to the point , and the GND terminal to the point using the DC power supply.

  • Page 12: Operation Check

    3.2 Operation Check TOP PREVIOUS NEXT 1. Input a signal (1 kHz, 100 mV) to the each line-in terminal. 2. Connect the oscilloscope or the speaker with the built-in amplifier to the PRE OUT terminals and check if the signals are outputting from this unit. Fig.1 •@ TOP PREVIOUS NEXT...

  • Page 13: Operation Checks And Component Replacementprocedures

    4 Operation Checks and Component Replacement/Procedures TOP PREVIOUS NEXT...
  • Page 15 •@ TOP PREVIOUS NEXT...

  • Page 16: Type Illustration Of Ics, Transistors And Diodes

    5 Type Illustration of ICs, Transistors and Diodes TOP PREVIOUS NEXT •@ TOP PREVIOUS NEXT...

  • Page 17: Schematic Diagram

    6 Schematic Diagram TOP PREVIOUS NEXT 6.1 Schematic Diagram Notes 6.2 Schematic Diagram •@ TOP PREVIOUS NEXT...

  • Page 18: Schematic Diagram Notes

    6.1 Schematic Diagram Notes TOP PREVIOUS NEXT This schematic diagram may be modified at any time with the development of new technology. Notes: S801: VGCA switch ( S802: Tape monitor switch (TAPE MONITOR) S804: Input select switch (SELECTOR) S805: Unit on/off switch ( VR301: Volume control VR (VOLUME)
  • Page 19 VR311: Output voltage adjustment VR (L ch) VR312: Output voltage adjustment VR (R ch) VR401: Balance control VR (BALANCE) VR402: Tone control VR (BASS) VR403: Tone control VR (TREBLE) Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with the chassis taken as standard.
  • Page 20 Ground the soldering iron. Put a conductive mat on the work table. Do not touch the legs of IC or LSI with the fingers directly. Voltage and signal line : Positive voltage line : Negative voltage line : Phono signal line : Tape rec signal line •@ TOP PREVIOUS NEXT...

  • Page 21: Schematic Diagram

    6.2 Schematic Diagram TOP PREVIOUS NEXT •@ TOP PREVIOUS NEXT...

  • Page 22: Printed Circuit Board Diagram

    7 Printed Circuit Board Diagram TOP PREVIOUS NEXT •@ TOP PREVIOUS NEXT...

  • Page 23: Block Diagram

    8 Block Diagram TOP PREVIOUS NEXT •@ TOP PREVIOUS NEXT...

  • Page 24: Wiring Connection Diagram

    9 Wiring Connection Diagram TOP PREVIOUS NEXT •@ TOP PREVIOUS NEXT...

  • Page 25: Measurements And Adjustments

    10 Measurements and Adjustments TOP PREVIOUS NEXT 10.1 Measurement instruments and Special tools 10.2 Output Voltage Adjustment •@ TOP PREVIOUS NEXT...

  • Page 26: Measurement Instruments And Special Tools

    10.1 Measurement instruments and Special tools TOP PREVIOUS NEXT AC electric voltmeter (AC EVM) AF oscillator •@ TOP PREVIOUS NEXT...

  • Page 27: Output Voltage Adjustment

    10.2 Output Voltage Adjustment TOP PREVIOUS NEXT 1. Turn on the power. 2. Select the input source to CD. 3. Connect the measuring instrument as shown in Fig.2 4. Apply 1 kHz, 200 mV signal to CD terminal. 5. Adjust the VOLUME to maximum. 6.
  • Page 28 •@ TOP PREVIOUS NEXT...

  • Page 29: Terminal Function Of Ics

    11 Terminal Function of ICs TOP PREVIOUS NEXT 11.1 IC701 (M38503M2404F) : Micro Computer •@ TOP PREVIOUS NEXT...

  • Page 30: Ic701 (M38503M2404F) : Micro Computer

    11.1 IC701 (M38503M2404F) : Micro Computer TOP PREVIOUS NEXT Pin No. Name Function Power supply (+5 V) terminal VREF Reference voltage input AGND GND terminal Chip select signal input Not used, open REMCON Remote control signal input BACKUP Power failure detect signal input Not used, open SELDATA O Data signal output for input select IC (IC201 and IC202)
  • Page 31 VGARLY O VGCA mode relay control signal output Not used, open SELPH Not used, open BATLVL2 Battery voltage detection (2) signal input (Not used, open) Not used, open RSWAD Power switch (S805) detect signal input KEYAD Tape monitor and VGCA switch input BATLVL1 Battery voltage detection (1) signal input (Not used, open) •@...

  • Page 32: Replacement Parts List

    All parts are supplied by MESA. Ref. No. Part No. Part Name& Description Pcs. Remarks RKM0078-1K TOP CABINET RHD30035-K1 SCREW XTBS3+8JFZ1 SCREW RGW0229-K KNOB,SELECTOR RGW0230-K KNOB,VOLUME RKA0053-A FOOT RMG0270-K RUBBER RDG0449 GEAR RGB0031-A TECHNICS BADGE RGB0112-N VGCA BADGE RGG0168C-K PANEL RGK0747-S RING ORNAMENT...
  • Page 33 RGK1111-K RGK1163-K DISPLAY 1 RGK1164A-K1 DISPLAY 2 RGL0453-Q PANEL LIGHT 1 RGL0454-Q PANEL LIGHT 2 RGP0740A-K SUB GRILL RGP0743-K GRILL RGU0890-1K BUTTON,POWER RGU1712-K BUTTON,OPEN RGU1774-S BUTTON,VGCA RGW0205-S KNOB, RHD26033 SCREW RHD26034 SCREW RHN90001 RKF0593-Q DOOR RKG0009 MAGNET RKW0273A-K FILTER RME0284 SPRING RMR1202-K ARM(L)
  • Page 34 C113,14 ECQB1H682JF3 50V 6800P C115,16 ECQB1H223JF3 50V 0.022U C117,18 ECEA1VKA4R7B 35V 4.7U C119,20 ECQB1H472JF3 50V 4700P C121,22 ECKR1H103ZF5 50V 0.01U C123,24 ECBT1H102KB5 50V 1000P C201,02 ECBT1H101KB5 50V 100P C203-06 ECCR1H101K5 50V 100P C211,12 ECBT1H101KB5 50V 100P C215 ECBT1H101KB5 50V 100P C217,18 ECBT1C103NS5 16V 0.01U...
  • Page 35 C419,20 ECBT1C332KR5 16V 3300P C421,22 ECQV1H823JZ 50V 0.082U C423,24 ECBT0J153MS5 6.3V 0.015U C425,26 ECBT1H121KB5 50V 120P C427,28 ECEA1HKS010 50V 1U C513,14 ECEA1HPS010 50V 1U C515,16 ECCR1H101J5 50V 100P C519,20 ECA1EPXS100B 25V 10U C521,22 ECA1CPXS470B 16V 47U C523,24 ECCR1H331J5 50V 330P C601 ECEA1HKS010 50V 1U...
  • Page 36 D521 MA165 DIODE D601 MA165 DIODE D607 MA165 DIODE D651-54 RL1N4003N02 DIODE D655,56 MA167 DIODE D658 MA4056M DIODE D701 1SS291TA DIODE D702 MA165 DIODE D704 1SS291TA DIODE D705-07 MA165 DIODE D709,10 MA165 DIODE D712 MA165 DIODE D801-04 SLR325VCT31 D806-08 SLR325VCT31 D811 SLR325DCT31 D812,13...
  • Page 37 L601-07 ELEXT1R0KA9 COIL L701 ELEXT101KA9 COIL L801 ELEXT101KA9 COIL L802 ELEXT100KA9 COIL RPG4512 PACKING CASE RPN1206 SPP756 PROTECTION COVER PCB1 REP2873A-M MAIN PCB (RTL) PCB2 REP2841D-S PANEL PCB (RTL) Q201 DTC124EST TRANSISTOR Q202 DTA124ESTP TRANSISTOR Q203 DTC124EST TRANSISTOR Q204 DTA124ESTP TRANSISTOR Q501 DTA124ESTP...
  • Page 38 R215-17 ERDS2FJ103 1/4W 10K R219-21 ERDS2FJ103 1/4W 10K R222,23 ERDS2FJ102 1/4W 1K R224 ERDS2FJ472 1/4W 4.7K R227 ERDS2FJ472 1/4W 4.7K R251-58 ERDS2FJ102 1/4W 1K R301,02 ERDS2FJ104 1/4W 100K R315,16 ERDS2FJ272 1/4W 2.7K R351,52 ERDS2FJ102 1/4W 1K R353,54 ERDS2FJ333 1/4W 33K R355,56 ERDS2FJ272 1/4W 2.7K...
  • Page 39 R726 ERDS2FJ102 1/4W 1K R728 ERDS2FJ104 1/4W 100K R801 ERDS2FJ821 1/4W 820 R802 ERDS2FJ102 1/4W 1K R803 ERDS2FJ122 1/4W 1.2K R804 ERDS2FJ152 1/4W 1.5K R805 ERDS2FJ182 1/4W 1.8K R806 ERDS2FJ222 1/4W 2.2K R807 ERDS2FJ332 1/4W 3.3K R808 ERDS2FJ472 1/4W 4.7K R809 ERDS2FJ682 1/4W 6.8K...
  • Page 40 VR311, 12 EVNDXAA00B23 VR,OUTPUT VOLT.ADJ. VR401 EVJ02QF01G15 VR,BALANCE VR402 ,03 EVJYA1F01C15 VR,BASS/TREBLE X701 RSXY8M00D01T OSCILLATOR Z801 RCD12042TH COMPONENT COMBINATION 1 •@ TOP PREVIOUS NEXT...
  • Page 41 13 Cabinet Parts Location TOP PREVIOUS NEXT •@ TOP PREVIOUS NEXT...
  • Page 42 14 Packaging TOP PREVIOUS •@ TOP PREVIOUS...
  • Page 49 POWER AMPLIFIER TAPE2 PRE OUT TAPE1 (SE-A909S) TUNER PHONO MAIN P.C.B. CN701 CN702 1 ..7 1 ..8 CN301 CN302 CN401 1 . . 4 1 ..7 1 .
  • Page 50 MAIN P.C.B. TAPE2/MD TAPE1 PHONO TUNER REC(OUT) PLAY(IN) REC(OUT) PLAY(IN) JK203 JK201 JK202 JK204 JK205 R206 R205 C206 C205 E203 C124 C123 5 6 7 8 IC101 R216 R220 R215 R219 C122 15 16 C121 15 16 IC202 R124 R123 IC201 C116 C115...
  • Page 51 PRE OUT (GND) (+15V) TO POWER AMPLIFIER PLAY(IN) (SE-A909S) C658 L604 JK801 JK501 L606 L602 L603 E204 RL521 D601 (AC10V) Q601 Q521 Q522 5 6 7 8 (-15V) IC511 Q603 Q602 (AC10V) D521 Q710 Q702 R302 R301 C304 C303 R358 5 6 7 8 5 6 7 8 IC311...
  • Page 52 ELECTRICAL PARTS LOCATION Ref. Ref. Ref. Ref. Ref. Ref. Ref. Ref. Ref. Ref. MAIN P.C.B. IC101 D601 X701 R206 R352 R706 C123 C256 C516 IC201 D607 RL201 R211 R353 R707 C124 C257 C519 IC202 D651 RL202 R101 R212 R354 R708 C201 C258 C520...
  • Page 53 TONE P.C.B. LED P.C.B. W704A 1 2 3 W401 C405 C407 C801 R405 IC401 C422 C406 R406 C426 C408 C424 Z801 C415 R407 R416 W705A VR401 VR402 VR403 C416 C425 C423 R408 R415 R409 R410 C417 C418 C420 C419 (REP2841D-S) W701 BALANCE TREBLE...
  • Page 54 :POSITIVE VOLTAGE LINE :PHONO SIGNAL LINE MAIN CIRCUIT :NEGATIVE VOLTAGE LINE :TAPE REC SIGNAL LINE JK501 14.2V C115 R131 C113 C117 0.022 6800P 35V4.7 R123 R127 R125 180K PRE OUT JK501 C123 1000P 14.2V IC101 AN6558F R101 C103 PHONO EQ AMP JK201 1.5K 50V4.7...
  • Page 55 :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :PHONO SIGNAL LINE 14.1V 14.2V Q522 IC511 R525 DTA124ESTP R521 C521 UPC4570C C513 16V47 50V1 RELAY DRIVE OUTPUT AMP RL521 14.1V 4.9V 12.7V Q521 DTC124ESTP RELAY DRIVE 14.2V R526 R522 C522 C514 16V47 50V1 C301 180P 14.1V...
  • Page 56 MAIN CIRCUIT :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :PHONO SIGNAL LINE 14.1V 14.2V 5.7V C305 R315 25V10 2.7K C306 R316 25V10 2.7K R503 3.3K R504 3.3K CN401 TONE CIRCUIT W401 C427 50V1 C407 C409 16V47 IC401 NJM4580EDTE1 TONE AMP R417 C401 C405 R405...
  • Page 57 :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE 14.1V 14.2V 5.7V K J I H G L D B C CN701 CN702 4 5 6 4 5 6 LED CIRCUIT 4 5 6 4 5 6 W701 W702 D801 804,806 808,817,818 SLR325VCT31 R819 0.3V 4.4V...
  • Page 58 MAIN CIRCUIT :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :PHONO SIGNAL LINE (GND) C658 Q601,602 0.01 DTA124ESTP JK801 (+15V) L601 Q601 RELAY DRIVE LOGIC GND L602 P ON/OFF 14.2V 14.4V L603 +B/VIRTUAL POWER L604 PRE GND AMPLIFIER L605 B/VIRTUAL (SE A909S) L606 AC BACKUP L607...
  • Page 59 TC9163N TC9164N IC201 IC202 INPUT SELECTOR AN6558F INPUT SELECTOR IC101 (18) (12) Phono PHONO EQ amp. (10) RL201 PLAY(IN) TAPE1 Q201,202 REC(OUT) Relay RL202 drive PLAY(IN) TAPE2/MD Q203,204 REC(OUT) Relay drive TUNER Mode Mode select select S804 ( SELECTOR) KEY SWITCH (S801,802) X701 (8MHz)
  • Page 60 UPC4570C IC351 amp. UPC4570C IC311 UPC4570C VR301 IC511 (VOLUME) FRONT1 amp. (L ch) Output amp. PRE OUT NJM4580EDTE1 VR311 IC401 FRONT2 (L ch) Tone amp. treble RL501 RL521 bass VR402(BASS), VR403(TREBLE) Q501,502 Q521,522 BA6218 IC391 Drive Relay Relay MOTOR DRIVE drive drive Pre amp...
  • Page 61 UPC4570C BA6218 NJM4580EDTE1 8PIN TC9163N 28PIN AN6558F BU2090AFE2 16PIN TC9164N 28PIN M38503M2404F 42PIN No.1 No.1 MA165TA M5F78M05L RL1N4003N02 1SS291TA MA167TA DTC114ESTP DTC114YSTP Cathode Cathode DTA124ESTP Cathode DTC124ESTP DTC144ESTP Anode Anode Anode SLR325DCT31 MA4056MTA SLR325VCT31 Cathode Anode Cathode Anode...

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