Yamaha RX-A4A Service Manual
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Yamaha RX-A4A Service Manual

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n CONTENTS（目次）
TO SERVICE PERSONNEL .................................................. 2
PANEL LAYOUTS ................................................................. 3
REMOTE CONTROL PANEL ................................................ 5
SPECIFICATIONS ................................................................. 6
DISASSEMBLY PROCEDURE / 分解手順 ...........................10
UPDATING FIRMWARE /
ファームウェアのアップデート ........................................ 20
INSPECTIONS / 検査 .......................................................... 23
AV
1014 5 1
-A0
2021.05
RX-A4A
SERVICE MANUAL
パワーアンプ調整 ............................................................. 48
IC DATA ............................................................................... 50
BLOCK DIAGRAMS / ブロック図 ....................................... 54
WIRING DIAGRAMS / 配線図 ............................................. 57
CIRCUIT BOARDS / シート基板図 ..................................... 60
PIN CONNECTION DIAGRAMS ......................................... 78
CIRCUIT DIAGRAMS .......................................................... 79
REPLACEMENT PARTS LIST ...........................................101
REMOTE CONTROL ..........................................................124
© 2021 Yamaha Corporation
AV RECEIVER

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  • Page 1: Table Of Contents

    DISASSEMBLY PROCEDURE / 分解手順 ......10 PIN CONNECTION DIAGRAMS ......... 78 UPDATING FIRMWARE / CIRCUIT DIAGRAMS ............79 ファームウェアのアップデート ........20 REPLACEMENT PARTS LIST ...........101 INSPECTIONS / 検査 ............23 REMOTE CONTROL ............124 1014 5 1 2021.05 © 2021 Yamaha Corporation...

  • Page 2: To Service Personnel

    RX-A4A n TO SERVICE PERSONNEL AC LEAKAGE WALL EQUIPMENT TESTER OR 1. Critical Components Information OUTLET UNDER TEST EQUIVALENT Components having special characteristics are marked ⚠ and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Models Only)

  • Page 3: Panel Layouts

    RX-A4A n PANEL LAYOUTS FRONT PANEL REAR PANELS J model Remote control sensor Front display リモコン信号受光部 フロントディスプレイ U, C models Standby indicator Touch panel スタンバイインジケーター タッチパネル R, L models...
  • Page 4 RX-A4A T model B, G, F models V model K model P, S models A model...

  • Page 5: Remote Control Panel

    RX-A4A n REMOTE CONTROL PANEL RAV577...

  • Page 6: Specifications

    RX-A4A n SPECIFICATIONS n Audio Section n FM Tuner Section n General Rated Output Power Headphone Impedance Tuning Range Power Supply ................. 16 ohms or more U, C models ...........87.5 MHz to 107.9 MHz U, C models .............. AC 120 V, 60 Hz – 1 channel driven –...
  • Page 7 RX-A4A n 参考仕様 n オーディオ部 n FM チューナー部 n 総合 定格出力 ヘッドホンインピーダンス 受信周波数範囲 電源電圧 .....................16 Ω 以上 ................. 76.0 MHz ~ 94.9 MHz ................AC 100 V, 50/60 Hz – 1 チャンネル駆動出力 – (1 kHz, 0.9% THD, 8 Ω) 周波数特性 (10 Hz ~ 100 kHz) 50 dB SN 感度 (IHF) 消費電力...
  • Page 8 The Bluetooth ® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Yamaha Corporation is 365 (14-3/8") under license. This AV Receiver is compatible with AirPlay 2. iOS 11.4 or later is required.

  • Page 9: Circuit Boards Layout / ユニットレイアウト

    IC90）へ書き込む必要があります。 （詳しい手順は、関連す e Wireless Network Module るサービスニュース、または技術報告を参照してください。 procedure, refer to related Service News or Service Bulletin. もしくはヤマハのサービスセンターまでご連絡ください） 。 f DC FAN MOTOR Or contact your local Yamaha representative.) g DIGITAL P.C.B. 安全対策 Safety measures h DSP P.C.B. • この製品の内部には高電圧部分があり危険です。修理の際 • Some internal parts in this product contain high voltages i FUNCTION (2) P.C.B.

  • Page 10: Disassembly Procedure / 分解手順

    RX-A4A EMBLEM n DISASSEMBLY PROCEDURE / 分解手順 エンブレム (Remove parts in the order as numbered.) Disconnect the power cable from the AC outlet. 1. Removal of SIDE PANEL L and SIDE PANEL R (Fig. 1) TOP COVER Remove 8 screws (1) and 4 screws (2).
  • Page 11 RX-A4A 3. Removal of FRONT PANEL ASSEMBLY (Fig. 2) ＊ In advance, remove the Cable clamps and the cable ties securing the cables. Remove the KNOB VOLUME and KNOB SELECTOR. DIGITAL P.C.B. b. Remove 6 screws (6) and 2 screws (7).
  • Page 12 RX-A4A 3-1. Removal of OPERATION (4) and (5) P.C.B. (Fig. 3) Remove 2 screws (9), and then remove the OPERATION (4). b. Remove screw (j), and then remove the EARTH PLATE. Remove 2 screws (k). d. Disconnect CB451, and then remove the OPERATION (5) P.C.B.
  • Page 13 RX-A4A 3-2. Removal of OPERATION (6), (7) P.C.B. and LCD MODULE (Fig. 4) The FRONT PANEL ASSEMBLY is supplied as a service part assembled for the following purposes. • To fasten together the FRONT PANEL and WINDOW SHEET surface-wide with double-sided tape •...
  • Page 14 RX-A4A 4. Removal of WIRELESS NETWORK MODULE (Fig. 5) The Wireless LAN Antenna Connectors can be removed by using MHF Connector Remover. EARTH PLATE Gray アースプレート  グレー b. Remove screw (n) and then remove the EARTH PLATE and WIRELESS NETWORK MODULE to upward.
  • Page 15 RX-A4A 5. Removal of FAN SUPPORT, DSP P.C.B. and DIGITAL P.C.B. DSP P.C.B. Disconnect CB23. (Fig. 7) b. Remove 2 screws (o), and then remode the FAN SUPPORT. (Fig. 7) Remove 2 screws (p), and then remode the DSP P.C.B. (Fig. 7) d. Remove 10 screws (q). (Fig. 8) DIGITAL P.C.B.
  • Page 16 RX-A4A 6. Removal of FUNCTION (1), (2) and (3) P.C.B. FUNCTION (1) P.C.B. Remove 3 screws (s). (Fig. 10) FUNCTION (2) P.C.B. b. Remove the FUNCTION (3) P.C.B. (Fig. 9) FUNCTION (3) P.C.B. Remove screw (t) and 7 screws (u). (Fig. 10) d. Disconnect CB201, CB240, CB605 and CB648. (Fig. 9) Remove 2 screws (v) and release 1 hook, and then remove the FUNCTION (1) P.C.B.
  • Page 17 RX-A4A Removal of TUNER (DAB) module / TUNER (DAB) P.C.B. When remove the TUNER (DAB) module / TUNER (DAB) P.C.B. before removing the FUNCTION (1) P.C.B, disconnect CB605. (Fig. 11) OPERATION (2) P.C.B. CB403 CB403 CB403 b. Remove 2 screws (w). (Fig. 12)
  • Page 18 RX-A4A When checking the P.C.B. (Fig. 13) • Put the rubber sheet and the cloth over this unit, and place the FRONT PANEL ASSEMBLY on them as shown below. • Connect the heatsink of the AMP unit (L) and heatsink of the AMP unit (R) to the chassis with a ground lead.
  • Page 19 RX-A4A When checking the DIGITAL P.C.B. (Fig. 14) • Put the rubber sheet and cloth over this unit, and place the DIGITAL P.C.B. on them. • Connect CB8 on DIGITAL P.C.B. to the chassis with a ground lead. • Reconnect all cables (connectors) that have been disconnected. Be sure to use the P.C.B. CHECKING JIG (Part No.

  • Page 20: ファームウェアのアップデート

    RX-A4A n UPDATING FIRMWARE / ファームウェアのアップデート When the following parts are replaced, the firmware must be ● Initializing the back-up IC ● Required Tools updated to the latest version. (EEPROM: IC90 on DIGITAL P.C.B.) • USB storage device DIGITAL P.C.B.
  • Page 21 RX-A4A ● Operation Procedures Front display フロントディスプレイ Disconnect the power cable from the AC outlet. Press the z key to turn off the power. (Fig. 1) Insert the USB storage device in which “firmware” is Remove the USB storage device from the USB jack.
  • Page 22 RX-A4A List of Error Messages エラーメッセージ一覧 When writing fails, “ERROR! XXXXXX” is displayed on the front panel display. 書込みエラーが発生すると、前面ディスプレイに “ERROR! XXXXXX” と表示されます。 “XXXXXX” is a HEX value, and each bit represents as follows: “XXXXXX” は 16 進の値で、以下のように各ビットを表しています。 Front display フロントディスプレイ...

  • Page 23: Inspections / 検査

    RX-A4A n INSPECTIONS / 検査 SELF-DIAGNOSTIC FUNCTION Main menu Sub-menu A: Audio system / オーディオ系 This unit has self-diagnostic functions that are intended for inspection, measurement and location of faulty point. DSP AUDIO DSP THROUGH PLL OFF Each item has a main menu, each of which has sub-menu items.
  • Page 24 RX-A4A Main menu Sub-menu Main menu Sub-menu U: Universal system / 特殊端子系 R: Radio system / TUNER・衛星放送系 USB FRONT 1 TRACK TUNER / DAB+ SIGNAL QUALITY (A, B, G, F models) USB FRONT 2 TRACK DAB MODULE VERSION (A, B, G, F models) N: Network system / ネットワーク系...
  • Page 25 RX-A4A Main menu Sub-menu Main menu Sub-menu P: Power supply system / 電源系 PROTECTION DETECTION HISTORY 1 1. HISTORY 1 1. LAST INPUT AD DATA CHECK 1. LAST VOLUME 1. POWER RELAY ON TIME TEMPERATURE 1. POWER RELAY OPERATION TIME OUTPUT LEVEL 1.
  • Page 26 RX-A4A ● Starting Self-Diagnostic Function (Fig. 1) menu “1-1 DSP THROUGH” is displayed after the self- Startup procedure / 起動手順 diagnostic function mode is activated. In advance, connect the power cable to the AC outlet to put The “No Protection” on the upper left of the display to indicate Beep this unit in standby mode.
  • Page 27 RX-A4A ● Display provided when Self-Diagnostic Function started The display is as described below depending on the situation 2. When the protection function worked to turn off 2-1. When there is a history of protection function 2-2. When the protection function worked due to when the power to this unit is turned off.
  • Page 28 RX-A4A 2-3. When the protection function worked due to Cause: 2-6. When the protection function worked due to Notes: abnormal voltage in the power supply section. The temperature of the heatsink/bridge diode (D1040) is short between speaker terminals. • Applying the power to this unit without correcting excessive.
  • Page 29 RX-A4A ● Operation procedure of Main menu and ● Functions in Self-Diagnostic Function ● Details of Self-Diagnostic Function menu Sub-menu mode A1. DSP AUDIO A2. CH AUDIO Each item has a main menu, each of which has sub-menu items. In addition to the self-diagnostic function menu items, functions listed below are available.
  • Page 30 RX-A4A A3. HDMI AUDIO This menu is used to check the route of audio signal input AMPPOWER P.C.B. RY301 peripheral circuit diagram A2-4. CH AUDIO:SURROUND A2-7. (BLANK) to HDMI IN/OUT jack. Not for service. The analog input audio signal is output to D 3 0 1 1 ＊...
  • Page 31 RX-A4A A4. AUDIO ROUTE CHECK This menu is used to check the speaker output. A3-4. ARC1 (Audio Return Channel function) A4-4. FULL MUTE A4-8. (BLANK) The audio signal input to HDMI OUT 1 jack is A4-1. BI-AMP The audio signals are muted at all channels.
  • Page 32 RX-A4A A5. IMPEDANCE TEST A6. MIC CHECK This menu is used to check the audio output impedance. A4-10. Z2 ADT A4-13. SW ADT A6-1. MIC ROUTE CHECK The ZONE2 distribution routes are checked. The MAIN ZONE distribution routes are checked A5-1.
  • Page 33 TEST ALL A7-3 A7-8 RX-A4A TEST CENTER TEST SURR L A7-2 A7. MANUAL TEST TEST FRNT L The test noise generated by built-in noise generator in A7-4. TEST FRONT R A7-9. TEST FRONT PRESENCE L A7-4 A7-9 DSP is output to the channels specified by the sub-menu.
  • Page 34 RX-A4A D1. LCD CHECK U1. USB N1. NETWORK This menu is used to check operation of the LCD display. This menu is used to check the audio signal route from This menu is used to check functions related to USB storage device.
  • Page 35 RX-A4A N1-3. LINE NOISE 100 MDI N1-6 LINE NOISE 10 MDIX N1-8. EXT TEST N1-9. ETHER MAC ADDRESS MAC address of the receiver is displayed. Line noise is measured. (Fix at 100 BaseTx, MDI） Line noise is measured. (Fix at 10 BaseT, MDIX）...
  • Page 36 RX-A4A N2. WIFI C1. ACCESS CHECK This menu is used to set functions related to wireless LAN This menu is used to check the communication and bus N2-12. WIFI MAC ADDRESS C1-4. I2C adaptor. line connection between devices on DIGITAL P.C.B.
  • Page 37 RX-A4A C2. NET CPU CHECK This menu is used to check the communication and bus C1-6. DIR BUS C1-8. EEPROM C1-11–14. DSP I2S CHECK line connection between devices related to network. Communication and bus line connection between EEPROM (IC90)ʼs reading is checked.
  • Page 38 RX-A4A C3. MCPU TO NCPU COMMUNICATION CHECK C4. FRONT BUTTON CHECK C5. DSP SPI CHECK V1. ANALOG VIDEO CHECK This menu is used to display the name of the operated This menu is used to check the analog video signal.
  • Page 39 RX-A4A V2. DIGITAL VIDEO CHECK V2-2 HDMI SC This menu is used to check the digital video signal route. V2-2. HDMI SCALING V2-3. (BLANK) V2-1. HDMI REPEAT The video / audio signals input to HDMI IN jack are Not for service.
  • Page 40 RX-A4A R1. TUNER / DAB+ T1. POWER This menu is used to check the AM/FM/DAB+ tuner This menu is used to display the operating time and V2-6. GUI-VIDEO OUT R1-3. FM module. operation frequency of this unit. The GUI is output from FPGA (IC54 on DIGITAL FM auto tuning is checked.
  • Page 41 RX-A4A T2. USAGE ENVIRONMENT This menu is used to display the maximum level of the T1-3. POWER AMP B T1-6. CPU OPERATION TIME T2-3. (BLANK) MAIN ZONE/ZONE 2 volume and the maximum value Not for service. The operation frequency of the POWER AMP B The operation time of CPU is displayed.
  • Page 42 RX-A4A T3. EXTERNAL EVENT T4. PROTECTION DETECTION This menu is used to display the history of key operation. T2-5. EEPROM ERROR This menu is used to display the history of protection function. When an error occurs in the EEPROM backup * No matter how many times the same key is pressed, it プロテクション履歴が表示されます。...
  • Page 43 RX-A4A P1. AD DATA CHECK This menu is used to display the A/D conversion value P1-2. PS P1-3. TEMPERATURE P1-4. OUTPUT LEVEL of the microprocessor which detects panel keys and Power supply voltage (PS) protection detection. TMP1: Temperature of the heatsink is detected.
  • Page 44 RX-A4A P2. PROTECTION HISTORY P3. FAN E1. DEVICE WRITE/CLEAR This menu is used to display the history of protection This menu is used to check the FAN operation. P1-7. HDMI TEMPERATURE E1-1. WN FLG CLEAR function. THM1: P3-1. FAN OFF This menu is used to clear the WN written flag.
  • Page 45 S4-1. SYSTEM VERSION MDL:A4A IC is not executed. Select The firmware version is displayed. this sub-menu to protect Model name the values set by the user. A4A: RX-A4A S4-1 PRESET: RESERVED S2-2. DESTINATION System: 0.32 (Initialization reserved) The destination is displayed.
  • Page 46 RX-A4A S4-4. MICROPROCESSOR CHECKSUM S4-7. FLASH ROM CHECKSUM S4-10. DSP2 VERSION S4-13. NET CHECKSUM The checksum value of MICROPROCESSOR (IC92 The checksum value of FLASH ROM (IC93 on The firmware version of DSP2 (IC114 on DIGITAL The checksum value of Wireless network module is on DIGITAL P.C.B.) is displayed.
  • Page 47 RX-A4A S4-16. FPGA SD (Standard Definition) VERSION S4-19. TOUCH SENSOR VERSION The firmware version of SD I/P scaler section in The firmware version of Touch sensor is displayed. FPGA (IC54 on DIGITAL P.C.B.) is displayed. S4-19 TOUCH: 1 S4-16 FPGA-S-V: 2 S4-17.

  • Page 48: Power Amplifier Adjustment / パワーアンプ調整

    RX-A4A n POWER AMPLIFIER ADJUSTMENT / パワーアンプ調整 Perform all adjustments with no signal applied. AMP (1) P.C.B. Warming up before adjustment is not required. Idling current adjustments DC offset confirmations アイドリング電流調節 DC オフセット確認 Item チャンネル ● Idling Current Adjustment Test Point...
  • Page 49 RX-A4A AMP (2) P.C.B. Idling current adjustments DC offset confirmations アイドリング電流調節 DC オフセット確認 Item チャンネル Test Point Adjustment Point Rating Test Point Rating テストポイント 調整箇所 規格 テストポイント 規格 Surround L CB243 pin1, pin2 VR240 Speaker Terminal (TE306) DC 15 ± 2 mV DC 0 ±...

  • Page 50: Ic Data

    RX-A4A n IC DATA IC90: TMPM4G9F15FG (DIGITAL P.C.B.) Microprocessor ＊ No replacement part available. / サービス部品供給なし Memory Cortex-M4 Code Flash ( with FPU) BOOT 512K to 1536KB 128K to 192KB Debug Data Flash Backup RAM (6KB) Clock control 32KB (CG)
  • Page 51 RX-A4A Port Name Function Name Related Power Supply Detail of Function Port Name Function Name Related Power Supply Detail of Function OFF ON OFF ON ECS3_N/PF5 FPGA_N_CS External Bus FPGA CS UT3CTS_N/T32A13INC0/T32A13INA0/INT09b/PU5 DSP1_N_INT DSP1_PON DSP1 Interrupt Signal EBELL_N/PF6 TSNS_N_RST O Touch Sensor Reset...
  • Page 52 RX-A4A Port Name Function Name Related Power Supply Detail of Function Port Name Function Name Related Power Supply Detail of Function OFF ON OFF ON PW1/TSPI8SCK/T32A00OUTA/T32A00OUTC EX_SCK O EEPROM/LCD Module Communication Clock DFF_FROM_N_ 107 PK4/TSPI1CS1/TSPI3TXD/SMI0D2 SF_IO2 Flash ROM Data2 EEPROM Chip Select...
  • Page 53 RX-A4A Port Name Function Name Related Power Supply Detail of Function OFF ON T32A04INA1/T32A04INC1/T32A04INB0/AINA09/ AD_SEL_B +3.3S_PON O AD Select B T32A05INB1/T32A05INC0/T32A05INA0/AINA10/ AD_SEL_C +3.3S_PON O AD Select C T32A05INA1/T32A05INC1/T32A05INB0/AINA11/ LCM_N_CS O LCD Driver Chip Select T32A06INB1/T32A06INC0/T32A06INA0/AINA12/ LCM_A0 O LCD Module A0...

  • Page 54: Block Diagrams / ブロック図

    RX-A4A AUDIO Section Block Diagram n BLOCK DIAGRAMS / ブロック図 F.Pres /Surr.Back /Zone2 F.Pres/Zone2/Bi-Amp AD_MZ1 SPRY_ZFP ADC-ATT VOL_SCK Clock Input 0/ -6/-6.5/-7.5/-9/-12dB VOL_MOSI Logic Data Input "Low" chip select ADC OUT AD_MZ FUNCTION (3) Surr.Back /Bi-Amp /F.Pres /Zone2 (SP) Z2 Pre Mute Surr.Back/Zone2...
  • Page 55 RX-A4A DIGITAL P.C.B. Section Block Diagram Antenna Antenna Ethernet ZONE 2/4 CB131 OUT1 OUT2 OUT3 CB135 HDMI SW1 DIGITAL MN864807 0ｘ70 • See page 79–86 o 0ｘ10 HDMI SW2 Apple CIRCUIT DIAGRAM MN864807 Authentification IC158 WiFi Module WN9711 FUNCTION (3) •...
  • Page 56 RX-A4A Power Supply Sections Block Diagram FUNCTION (2) OPERATION (4) +5A /+5DA +5AD +12A MicAmp MAIN 2SD2014 Q3013 +5DIR -12A DIR1/DIR2 +5HT_PON MicAmp TRANSFORMER FUNCTION (1) TPS7A2501 TPS25200 USB_VBUS_PON +12AMP +5.5V +5HT1 +5HT1 eFUSE Opeamp (Main/Zone) HDMI OUT1 R1173H001D +5.5V VBUS (5.15V)

  • Page 57: Wiring Diagrams / 配線図

    RX-A4A n WIRING DIAGRAMS / 配線図 Set black wire to CABLE GUIDE. Set black wire to CABLE GUIDE. DIGITAL 90 mm (3-1/2") CABLE GUIDE CABLE GUIDE Black wire Black wire Thread the wire REAR PANEL － P.C.B. and CABLE GUIDE.
  • Page 58 RX-A4A OPERATION (1) FUNCTION Top view TUNER (J, U, C, R, T, K, R, (J, U, C, R, T, K, R, L, V, P, S models) L, V, P, S models) (A, B, G, F models) (A, B, G, F models)
  • Page 59 RX-A4A Fix the wire to P.C.B. Wires fixed by style pin (PN306) should be close to P.C.B. Fix the wires to P.C.B. OPERATION (1) W3011A W3011A PN303 PN303 W3029C/D W3029C/D PN306 PN306 W3011B W3011B AMPPOWER CB403 CB403 Fix the wire to chassis.

  • Page 60: Circuit Boards / シート基板図

    RX-A4A n CIRCUIT BOARDS / シート基板図 NETWORK HDMI OUT HDMI HDMI OUT No replacement part available (4 NET RADIO) DIGITAL サービス部品供給なし (Side A) (8 SERVER) (ZONE OUT) (6 GAME) (5 STB) (1 MOVIE) eARC/ARC CB21 CB22 IC42 IC134 IC24 IC20...
  • Page 61 RX-A4A DIGITAL (Side B) IC35 IC31 IC33 IC27 IC26 No replacement part available IC138 サービス部品供給なし IC22 IC132 IC32 IC101 IC128 IC57 IC44 No replacement part available サービス部品供給なし IC170 IC155 IC160 IC95 IC76 IC173 IC53 IC156 IC117 IC174 IC126 IC120 IC99...
  • Page 62 RX-A4A • Semiconductor Location Ref no. Location Ref no. Location Q6043 D6001 Q6044 FUNCTION (1) (Side A) D6002 Q6045 D6003 Q6046 PRE OUT ZONE OUT AUDIO 4 AUDIO 3 AUDIO 2 PHONO IC601 Q6047 (3 MUSIC) IC602 Q6048 CENTER SUBWOOFER SUR.BACK...
  • Page 63 RX-A4A • Semiconductor Location Ref no. Location IC605 FUNCTION (1) (Side B) IC606 IC607 IC608 Q6005 Q6006 Q6025 Q6026 IC606 IC608 IC607...
  • Page 64 RX-A4A FUNCTION (2) FUNCTION (3) (Side A) (Side A) FUNCTION (1) (CB602) FUNCTION (1) FUNCTION (1) (CB603) (CB601) AUDIO 3 AUDIO 2 AUDIO 1 (3 MUSIC) (7 TV) COAXIAL OPTICAL OPTICAL No replacement part available サービス部品供給なし CB641 CB645 CB643 AMPPOWER...
  • Page 65 RX-A4A FUNCTION (2) FUNCTION (3) (Side B) (Side B)
  • Page 66 RX-A4A • Semiconductor Location Ref no. Location D4002 D4005 D4006 OPERATION (1) OPERATION (2) (Side A) (Side A) D4007 D4008 D4009 AC IN D4010 REMOTE TRIGGER OUT D4011 1 / 2 D4012 D4013 D4014 D4015 D4016 CB401 CB402 IC402 D4017...
  • Page 67 RX-A4A OPERATION (1) OPERATION (2) (Side B) (Side B) • Semiconductor Location Ref no. Location D4001 D4003 D4004 D4011 D4012 D4102 IC402 IC403 Q4001 Q4002 Q4105 Q4106...
  • Page 68 RX-A4A • Semiconductor Location Ref no. Location D4301 OPERATION (4) (Side A) OPERATION (5) (Side A) DIGITAL D4304 (CB135) FUNCTION (2) D4305 (CB647) to chassis D4306 PHONES D4307 D4308 to chassis D4401 W4302 W4301 W4304 D4402 Standby D4403 indicator W4303...
  • Page 69 RX-A4A • Semiconductor Location Ref no. Location Q4302 OPERATION (4) (Side B) OPERATION (5) (Side B) D4303 D4301 D4302 OPERATION (6) OPERATION (7) (Side B) (Side B)
  • Page 70 RX-A4A • Semiconductor Location Ref no. Location IC481 IC801 IC802 OPERATION (8) (Side A) (Side A) IC803 IC806 IC807 IC808 IC810 IC812 CB847 CB848 No replacement part available IC481 サービス部品供給なし IC812 CB481 OPERATION (6) (CB453) IC803 CB843 CB844 CB832 CB831...
  • Page 71 RX-A4A • Semiconductor Location Ref no. Location D8301 IC804 IC805 OPERATION (8) (Side B) (Side B) IC811 IC813 SCENE RETURN MENU (CONNECT) IC813 No replacement part available IC804 サービス部品供給なし DGND DGND DSP2_BCK DSP1_MCK DGND DGND DSP2_WCK DSP1_BCK DGND DGND DSP2_SD0...
  • Page 72 RX-A4A AMP (1) (Side A) AMPPOWER AMPPOWER AMPPOWER AMPPOWER (W3024) (W3006A) (W3012) (W3006B) AMP (3) (Side A) LB_GND +LB_R -LB_R I_PRT_R DIGITAL (CB85) AMPPOWER (W3030) • Semiconductor Location Ref no. Location Q2021 Q2022 Q2023 Q2024 Q2025 Q2026 Q2027 Q2028 Q2029...
  • Page 73 RX-A4A AMP (1) (Side B) AMP (3) (Side B) • Semiconductor Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no.
  • Page 74 RX-A4A • Semiconductor Location Ref no. Location Ref no. Location Q2431P Q2423 Q2431N Q2422 Q2430P Q2421 Q2430N Q2420 Q2429P Q2419 Q2429N Q2418 AMP (2) (Side A) AMPPOWER AMPPOWER AMPPOWER Q2428P Q2417 (W3005B) (W3013) (W3005A) Q2428N Q2416 AMP (4) (Side A)
  • Page 75 RX-A4A • Semiconductor Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location D2400 D2407 D2414 D2421 Q2404 Q2411 Q2419 Q2426 Q2430P...
  • Page 76 RX-A4A Safety measures • Some internal parts in this product contain high voltages AMPPOWER (Side A) and are dangerous. Be sure to take safety measures during servicing, such as wearing insulating gloves. SPEAKERS • Note that the capacitors indicated below are dangerous even after the power is turned off because an electric EXTRA SP.2...
  • Page 77 RX-A4A • Semiconductor Location AMPPOWER (Side B) Ref no. Location Ref no. Location D3001 Q3004 D3002 Q3004 D3003 Q3005 D3004 Q3006 D3005 Q3010 D3006 Q3011 D3007 Q3012 D3010 Q3013 D3011 Q3015 D3012 Q3016 D3013 Q3017 D3014 Q3018 D3015 Q3019 D3016...

  • Page 78: Pin Connection Diagrams

    RX-A4A n PIN CONNECTION DIAGRAMS • ICs TPS25942ARVCR W25Q16JVSSIQ • ICs TMPM4G9F15FG W9812G6KH-6 SDRAM W25Q32JVSSIQ W9825G6KH-6 SDRAM 74LCX32FT A3V28S40JTP-60 BA15218F BD34703KS2 CS2100CP-CZZR 74LCX126FT XCL209B333DR TPS54308 TPS62065DSGR 74VHC273FT XC6233H181NR-G CY8CMBR3106S ES9007S FA8A61N NE5532DR NJM2388F33 • Diodes 1SS355VM 1SS352 BAV103 CMH04 D5SBA60 5A 600V...

  • Page 79: Circuit Diagrams

    RX-A4A n CIRCUIT DIAGRAMS HDMI OUT HDMI 3 (ZONE OUT) H D M I Z O N E 2 / 4 O U T DIGITAL 1/8 C B 8 C B 7 H D M I I N - 7...
  • Page 80 RX-A4A HDMI OUT 1 (eARC/ARC) C B 2 2 DIGITAL 2/8 C B 2 1 H D M I O U T 1 H D M I O U T 2 e F u s e D C 0 4 S 0 1 9 J A A R 2 0 0...
  • Page 81 RX-A4A DIGITAL 3/8 t o 0 0 2 . s h t H R X _ Y [ 0 - 7 ] , H R X _ C [ 0 - 7 ] , H R X _ D E , H R X _ H S , H R X _ V S...
  • Page 82 RX-A4A to DIGITAL 3/8 0 0 1 . s h t to DIGITAL 2/8 0 0 4 . s h t to DIGITAL 5/8 0 0 8 . s h t to DIGITAL 7/8 to DIGITAL 8/8 to DIGITAL 1/8...
  • Page 83 RX-A4A DIGITAL 5/8 D A C 1 _ S C L D A C 1 _ S C L D A C 1 _ S D A D A C 1 _ S D A D S P _ M O S I...
  • Page 84 RX-A4A IC117: RP130K331D-TR DIGITAL 6/8 Voltage regulator No replacement DSP2 part available. + 3 . 3 D S P 2 a Serial Flash D S P D 8 1 Y サービス部品供給なし D S P 2 _ B C K O...
  • Page 85 RX-A4A IC135: PCM5101APWR + 3 . 3 D S P 2 + 3 . 3 D A C No replacement 106 dB audio selector DAC with 32-bit, 384 kHz PCM interface part available. DIGITAL 7/8 n o _ u s e サービス部品供給なし...
  • Page 86 RX-A4A ★ All voltages are measured with a 10 MΩ/V DC electronic voltmeter. D S P 1 _ M C K I D S P 1 _ M C K I DIGITAL 8/8 ★ Components having special characteristics are D S P 1 _ B C K I D S P 1 _ B C K I marked ⚠...
  • Page 87 RX-A4A DSP 1/5 K P D _ P W R _ N No replacement No replacement No replacement C 8 0 0 6 part available. part available. part available. 0 . 1 / 1 0 サービス部品供給なし サービス部品供給なし サービス部品供給なし + 3 . 3 M...
  • Page 88 RX-A4A DSP 2/5 S D C 1 _ D A T A 7 S D C 1 _ D A T A 7 No replacement No replacement No replacement S D C 1 _ D A T A 6 part available.
  • Page 89 RX-A4A DSP 3/5 S P M I _ C L K S P M I _ C L K S P M I _ D A T A S P M I _ D A T A P S _ H O L D...
  • Page 90 RX-A4A DSP 4/5 n o _ u s e R G M I I _ C T L _ T X R G M I I _ C T L _ T X R G M I I _ C K _ T X...
  • Page 91 RX-A4A DSP 5/5 No replacement No replacement No replacement No replacement No replacement part available. part available. part available. part available. part available. サービス部品供給なし サービス部品供給なし サービス部品供給なし サービス部品供給なし サービス部品供給なし 0 0 3 . s h t I C 8 0 1...
  • Page 92 RX-A4A AUDIO 1 AUDIO 2 AUDIO 3 AUDIO 4 n o _ u s e (7 TV) (3 MUSIC) PHONO A V 2 A V 3 FUNCTION 1/3 P H O N O A u d i o 2 A u d i o 3...
  • Page 93 RX-A4A Page 96 H2 Page 85 K9 Page 85 K3 Page 85 K6 Page 99 to OPERATION (4) to DIGITAL to DIGITAL to DIGITAL to AMPPOWER_W3003 FUNCTION 2/3 W4301 IC641, IC642, IC643, IC644, IC645: NE5532DR CB124 CB125 CB123 f r o m D I G I T A L ( 1 )
  • Page 94 RX-A4A AUDIO 1 AUDIO 2 AUDIO 3 OPTICAL OPTICAL COAXIAL n o _ u s e FUNCTION 3/3 A V 1 A U D I O 1 A U D I O 2 A U D I O 3 A V 2...
  • Page 95 RX-A4A Safety measures • Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such as wearing insulating gloves. OPERATION 1/3 D e s t i n a t i o n P a r t L i s t M A I N T R A N S F O R M E R •...
  • Page 96 RX-A4A REMOTE OPERATION 2/3 Page 99 B9 R E M O T E to AMPPOWER W3028 O U T f r o m A M P P O W ( 1 ) W 4 3 0 1 O P E ( 2 )
  • Page 97 RX-A4A OPERATION 3/3 Page 82 J9 to DIGITAL CB86 1 . 0 m m p i t c h S M T t y p e S i d e a n g l e t o D I G I T A L 3.3V...
  • Page 98 RX-A4A AMP (4) AMP (1) A M P ( 4 ) W 2 9 0 0 Page 82 I9 D G N D R 2 9 0 1 R 2 9 0 0 to DIGITAL + 3 . 3 T H M 2...
  • Page 99 RX-A4A Page 98 K9 to AMP (1) N O T I C E T o A m p . _ R R E S I S T O R ( m o d e l ) AMPPOWER CB208 R E M A R K S...
  • Page 100 RX-A4A n REPLACEMENT PARTS LIST DIGITAL • ELECTRICAL COMPONENT PARTS Ref No. Part No. Description Remarks Markets 部品名 VDQ86600 P.C.B. DIGITAL ＰＣＢ　ＤＩＧＩＴＡＬ　 WARNING CB1-8 VDF66200 CN.HDMI HDMI 19P SE ＨＤＭＩコネクター ● Components having special characteristics are marked ⚠ and must be replaced with parts having specifications...

  • Page 101: Replacement Parts List

    RX-A4A DIGITAL DIGITAL Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 C269-272 UZ563100 C.CE.CHP 1000pF チップセラコン C1000 UZ563100 C.CE.CHP 1000pF チップセラコン C273-274 ZZ744800 C.EL 100uF 6.3V ポスキャップ　　　　　　 C1005 UV246100 C.CE.CHP チップセラコン C275-276 UZ563100 C.CE.CHP...
  • Page 102 RX-A4A DIGITAL DIGITAL Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 C1335-1336 UV246100 C.CE.CHP チップセラコン YK953A00 TPS7A2501DRVR 電源ＩＣ　　　　　　　　 C1339 UZ563100 C.CE.CHP 1000pF チップセラコン * IC4 YG881A00 RP130K181D-TR 電源ＩＣ　　　　　　　　 C1343-1344 WU839500 C.CE.CHP 2200pF チップセラコン　　　　　...
  • Page 103 RX-A4A DIGITAL DIGITAL Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 * IC160 YK770A00 TLV74112PDQNR 電源ＩＣ　　　　　　　　 Q1200 ZZ539800 2SCR513P5 トランジスタ　　　　　　 * IC161 YK772A00 TLV74125PDQNR 電源ＩＣ　　　　　　　　 Q1300 WW782100 TR.DGT DTC014EUBTL デジタルトランジスタ　　 IC164 YG936A00 XC6233H181NR-G 電源ＩＣ　　　　　　　　...
  • Page 104 RX-A4A DIGITAL DIGITAL Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R64-65 RD457100 R.CHP 10K Ω 1/16W J チップ抵抗　　　　　　　 R134-135 RD457470 R.CHP 47K Ω 1/16W チップ抵抗　　　　　　　 R66-67 RD457470 R.CHP 47K Ω 1/16W チップ抵抗　　　　　　　...
  • Page 105 RX-A4A DIGITAL DIGITAL Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R259 RD457100 R.CHP 10K Ω 1/16W J チップ抵抗　　　　　　　 R520-522 RD456100 R.CHP 1K Ω 1/16W J チップ抵抗　　　　　　　 R260-264 RD455100 R.CHP 100 Ω...
  • Page 106 RX-A4A DIGITAL DIGITAL Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R858 RD456100 R.CHP 1K Ω 1/16W J チップ抵抗　　　　　　　 R1014-1015 RD455100 R.CHP 100 Ω 1/16W J チップ抵抗　　　　　　　 R859 RD458100 R.CHP 100K Ω...
  • Page 107 RX-A4A DIGITAL DIGITAL and DSP Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R1175-1176 RD457100 R.CHP 10K Ω 1/16W J チップ抵抗　　　　　　　 R1347 RD457100 R.CHP 10K Ω 1/16W J チップ抵抗　　　　　　　 R1200 RF455680 R.CHP 680 Ω...
  • Page 108 RX-A4A DSP and FUNCTION Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 C8104-8105 UV016100 C.CE.CHP 6.3V チップセラコン * R8049 RD657100 R.CAR.CHP 10K Ω 1/20W チップ抵抗　　　　　　　 C8110-8119 UV016100 C.CE.CHP 6.3V チップセラコン * R8101-8102 RD650000 R.CAR.CHP...
  • Page 109 RX-A4A FUNCTION FUNCTION Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 C6040 UZ062220 C.CE.CHP 220pF チップセラコン C6430 UU237100 C.EL 10uF ケミコン　　　　　　 C6043-6044 UU238100 C.EL 100uF ケミコン　　　　　　　　 C6434 ZD517600 C.MYLAR 100pF 100V マイラーコン　　　　　　...
  • Page 110 RX-A4A FUNCTION FUNCTION Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 J6030 RD350000 R.CHP 0 Ω 1/16W J チップ抵抗　　　　　　　 R6041 RD356220 R.CHP 2.2K Ω 1/16W J ABGF チップ抵抗　　　　　　　 J6034 RD350000 R.CHP 0 Ω...
  • Page 111 RX-A4A FUNCTION FUNCTION Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R6224 RD255270 R.CHP 270 Ω 1/10W J チップ抵抗　　　　　　　 R6405 RF356910 R.MTL.CHP 9.1K Ω 1/16W D チップ金属皮膜抵抗 R6225-6226 RD357100 R.CHP 10K Ω...
  • Page 112 RX-A4A FUNCTION and OPERATION OPERATION Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R6498 VI192500 R.MTL.CHP 100 Ω 1/10W チップ金属被膜抵抗　　　 ⚠ C4007 WJ322300 C.CE.M.CHP 1000pF 630V チップ積層セラコン　　　 R6499 VI195300 R.MTL.CHP 1.5K Ω...
  • Page 113 RX-A4A OPERATION OPERATION Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 C4513 UZ635100 C.CE.CHP 0.1uF チップセラコン Q4103-4104 WC529400 KTC3875S Y GR RTK トランジスタ　　　　　　 C4515 UZ764100 C.CE.CHP 0.01uF チップセラコン ⚠ Q4105-4106 ZA348800 KTA1046-Y-U/PFY トランジスタ　　...
  • Page 114 RX-A4A OPERATION OPERATION and AMP Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R4111-4112 RD356560 R.CHP 5.6K Ω 1/16W J チップ抵抗　　　　　　　 R4718 RD357470 R.CHP 47K Ω 1/16W J チップ抵抗　　　　　　　 R4113 RD357200 R.CHP 20K Ω...
  • Page 115 RX-A4A Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 C2409 ZD520800 C.MYLAR 0.047uF 100V マイラーコン　　　　　　 Q2423 ZH762900 2SA1145 O,Y トランジスタ　　 * C2411 VDF02900 C.PP 100pF 100V ＰＰコン　　　　　　　　 Q2424-2426 WF549900 2SC3906K T146 R,S トランジスタ　...
  • Page 116 RX-A4A AMP and AMPPOWER AMPPOWER Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R2434 RF456510 R.CHP 5.1K Ω 1/16W F チップ抵抗　　　　　　　 C3001 ZD518800 C.MYLAR 1000pF 100V マイラーコン　　　　　　 R2435 V8070000 R.MTL.FLM 1 Ω...
  • Page 117 RX-A4A AMPPOWER AMPPOWER Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 D3001-3003 ZP358600 DIODE 1SS352 TE ダイオード　　　　　　　 R3027 RD355100 R.CHP 100 Ω 1/16W J チップ抵抗　　　　　　　 ⚠ D3004-3005 WY164200 DIODE.ZENR UDZV13B ツェナーダイオード　　　 R3028-3029 RD358100 R.CHP...
  • Page 118 RX-A4A AMPPOWER and TUNER TUNER and DAB Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 R3119 RD357220 R.CHP 22K Ω 1/16W J チップ抵抗　　　　　　　 RD455820 R.CHP 820 Ω 1/16W チップ抵抗　　　　　　　 R3120-3125 RF457680 R.CHP 68K Ω...
  • Page 119 RX-A4A l OVERALL ASSEMBLY 900-1 4 (2) 3 (2) 4 (3) 4 (1) 3 (1) Amp unit T, K models Amp unit T model U, C, R, L, V, P, S, J models A, B, G, F models U, C, R, T, K, L, V,...
  • Page 120 RX-A4A Ref No. Part No. Description Remarks Markets 部品名 Ref No. Part No. Description Remarks Markets 部品名 VDQ86600 P.C.B. ASSEMBLY DIGITAL ＰＣＢ　ＤＩＧＩＴＡＬ　 WK912500 BIND HEAD B-TIGHT SCREW 3x15 MFZN2B3 バインドＢタイトネジ WE994800 BIND HEAD S-TIGHT SCREW MFZN2B3 バインドＳタイトネジ VDQ98400 P.C.B. ASSEMBLY ＰＣＢ　ＤＳＰ　　　　　...
  • Page 121 カード電線　　　　　　　 3 (4) * 23 VEG20100 LCD MODULE VATN ＬＣＤモジュール * 269 VDR02900 EARTH PLATE アースプレート　　 * 270 VDR07500 FRONT PANEL AVENTAGE RX-A4A print フロントパネル 3 (5) * 300 VDR018i0 SUB-PANEL VDR0180 サブパネル　　 * 301 VDR019i0 LENS VDR0190 レンズ　　　 * 302...
  • Page 122 RX-A4A l AMP UNIT Ref No. Part No. Description Remarks Markets 部品名 VDQ87200 P.C.B. ASSEMBLY ＰＣＢ　ＡＭＰ　　　　　 VDQ87300 P.C.B. ASSEMBLY UCVPS ＰＣＢ　ＡＭＰ　　　　　 VDQ87400 P.C.B. ASSEMBLY RTKABGF ＰＣＢ　ＡＭＰ　　　　　 VDQ93800 P.C.B. ASSEMBLY AMPPOWER ＰＣＢ　ＡＭＰＰＯＷＥＲ VDQ93900 P.C.B. ASSEMBLY AMPPOWER UCVPS ＰＣＢ　ＡＭＰＰＯＷＥＲ VDQ94000 P.C.B. ASSEMBLY AMPPOWER RTKABGF ＰＣＢ　ＡＭＰＰＯＷＥＲ...
  • Page 123 RX-A4A n REMOTE CONTROL SCHEMATIC DIAGRAM VBATT ZONE 2 Main 0603 1206 1 VSS 2 KI0/P2.0 P3.0/REM/CLKO P2.1 KI1/P2.1 P0.6 4 [PCLK]/KI0/P1.0/XIN LIGHT_ENB P0.5/NRST/[VPP] 5 KI1/P1.1/XOUT P0.4/T1 6 KI2/P1.2 P0.3/T0 7 [PDATA]/REM/KI3/P1.3 P0.2 8 KI4/P1.4 P0.1/INT1 PSCL 9 KI5/P1.5 P0.0/INT0 10 KI6/P1.6...

  • Page 124: Remote Control

    RX-A4A PANEL KEY NO. LAYOUT KEY CODE ID-1 ID-2 ID-1 ID-2 Key No. Key Name Key No. Key Name MAIN ZONE 2 MAIN ZONE 2 MAIN ZONE 2 MAIN ZONE 2 ZONE 1/ZONE 2 [MAIN] [ZONE2] [MAIN] [ZONE2] TOP MENU...
  • Page 125 RX-A4A...

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