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The AV-S77 is composed of the AV-S77C, the NX-SW77 and the NX-S77E.
FRONT SPEAKER (AV-S77C)
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users,
and have therefore not been restated.
WARNING:
Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive
components, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service required
should be performed by an authorized YAMAHA Retailer or the appointed service representative.
IMPORTANT:
The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or recognition of any applicable
technical capabilities, or establish a principle-agent relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA are
continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to
retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.
WARNING:
Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to the
ground buss in the unit (heavy gauge black wires connect to this buss).
IMPORTANT:
Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.
I CONTENTS
TO SERVICE PERSONNEL .......................................... 1
FRONT/REAR PANEL ............................................... 1~2
SPECIFICATIONS ...................................................... 3~4
INTERNAL VIEW (AV-S77C) ........................................ 4
DISASSEMBLY PROCEDURES ............................... 5~6
P.C.B. OPERATION CHECK ......................................... 6
TEST PROGRAM MODE ........................................... 7~9
DSP DIAG MODE (Self-diagnosis) ........................ 9~16
1 0 0 7 7 5

HOME THEATER SYSTEM

AV-S77
SERVICE MANUAL
REAR SPEAKER
(NX-S77E)

IMPORTANT NOTICE

IC DATA ................................................................. 17~23
DISPLAY DATA ........................................................... 24
BLOCK DIAGRAM ................................................. 25~29
PRINTED CIRCUIT BOARD .................................. 30~41
SCHEMATIC DIAGRAM ........................................ 42~46
PARTS LIST ........................................................... 47~59
REMOTE CONTROL TRANSMITTER ........................ 60
SUBWOOFER
(NX-SW77)
REAR SPEAKER
(NX-S77E)
P.O.Box 1, Hamamatsu, Japan

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   Summary of Contents for Yamaha AV-S77

  • Page 1: Table Of Contents

    The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit.

  • Page 2: To Service Personnel

    AV-S77 I TO SERVICE PERSONNEL 1. Critical Components Information AC LEAKAGE Components having special characteristics are marked s WALL EQUIPMENT TESTER OR and must be replaced with parts having specifications equal OUTLET UNDER TEST EQUIVALENT to those originally installed. 2. Leakage Current Measurement (For 120V Models Only)

  • Page 3

    AV-S77 M REMOTE CONTROL M NX-S77E TRANSMITTER M NX-SW77...

  • Page 4: Specifications

    Frequency Response ..........140Hz ~ 20kHz * Specifications are subject to change without notice due to product improvements. SUBWOOFER SECTION (NX-SW77) Type ......Advanced YAMAHA Active Servo Technology B ..British model G ..European model Driver ........16cm Cone, Magnetic Shielding Type Frequency Response ..........

  • Page 5: Internal View (av-s77c)

    AV-S77 M NX-S77E Dimensions 100 (3-15/16") 112 (4-3/8") Unit: mm (inch) M NX-SW77 Dimensions 435 (17-1/8") 433 (17-1/16") 176 (6-15/16") Unit: mm (inch) I INTERNAL VIEW (AV-S77C) 1 MAIN P.C.B. 2 DSP P.C.B. 3 OPERATION P.C.B.

  • Page 6: Disassembly Procedures

    AV-S77 I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) Disconnect the power cord from the AC outlet. AV-S77C Disassembly procedures Bottom 1. Removal of Grille Ass'y a. Insert a flat tip screwdriver or the like from the bottom of the Grille Assembly.

  • Page 7: Operation Check

    AV-S77 NX-SW77 Disassembly procedures 1. Removal of Grille Ass'y a. Push up the Grille Assembly with a flat tip screwdriver or the like inserted from the bottom. (Fig. 4). b. Keep pushing up the Grille Assembly gradually until it can be removed.

  • Page 8: Test Program Mode

    AV-S77 I TEST PROGRAM MODE 1. Procedure for starting Test Program With the power plug disconnected from the outlet, reconnect it to the outlet while pressing the [VOLUME] key and the [DSP] key simultaneously, and the Test Program will be activated.

  • Page 9

    AV-S77 Display Function The DSP DIAG (self-diagnosis) mode is activated. (Refer to next page for the details.) 05 DSP Diag 06 Ver-1.02 Microprocessor version / date display 05 Ver-1.02 Example of microprocessor display 05 '01.06.07 Example of microprocessor date display What is displayed varies depending on the microprocessor software.

  • Page 10: Dsp Diag Mode (self-diagnosis)

    AV-S77 Display Function ROM collection (EEPROM) check sum calculation/calculation start 13 Cors- St. This message is displayed only when data exists in the ROM correction area of EEPROM. 13 Cors-288b Example of display The ROM collection (EEPROM) is utilized to cope with the data area for backup and microprocessor bugs partially.

  • Page 11

    AV-S77 FL display of AC-3/dts Through A combination of the sampling frequency and the number of channels is displayed. Example: "AC-3 32k 2/0" AC3/dts Sampling frequency Number of channels (Front/Rear) Analo Analog 32kHz – 44.1kHz 44.1k – 48kHz – –...

  • Page 12

    AV-S77 Details of DIAG menu 1. Analog Through The input is fixed to use the analog (A/D) and has 2 sub-menu items. MAIN BYPSS The main L/R signal is output through the analog bypass without passing the DSP section. The main L/R signal passing through the DSP is output through C/SW and RL/RR.

  • Page 13

    AV-S77 2. DSP Through In the DIGITAL input mode, AC3/PCM AUDIO signal is automatically identified. There are 3 sub-menu items. YSS918-SRAM The main L/R signal is sent through AC3Dav into DSP. After passing through SRAM, the main L/R signal is output through L+R and C/SW and RL/RR signals through (L+R)/2.

  • Page 14

    AV-S77 DSP FULL BIT The main L/R is input through AC3Dav to DSP and then output through all channels. The same applies as “YSS918” except that the digital data is output in full bit at D/A. AUX IN – 20dBV, Both ch...

  • Page 15

    AV-S77 4. Pro Logic The sub-menu items include selection of Pro-logic (The auto input balance is off.) and EFFECT OFF. CENTER LARGE When the analog, PCM audio or AC-3 2/0 mode is used, L, R, C, S signals are pro- logic decoded and output.

  • Page 16

    AV-S77 5. Speakers Set (for reference only) This menu is for checking during the production process and not for servicing. The input L/R signal is output through the specified channels according to the sub-menu. There are 7 sub-menu items. The signal output from the DSP section is normally in the EFFECT OFF state in the menus from 1 to 3.

  • Page 17

    AV-S77 7. Manual Test The test noise is output by the noise generator with a built-in DSP through the channels specified by the sub-menu. Noise is output through all channels. MAIN L Noise is output through the MAIN L channel.

  • Page 18: Ic Data

    AV-S77 I IC DATA IC3 : YM3436DK DIR ( Digital Format Interface Receiver ) 24 26 28 25 17 15 14 13 12 31 EXTW SYSTEM DAUX CLOCK HDLT TIMING DOUT SYNC GENERATOR TSTN D DIN DATA CLOCK SYNC CTLP...

  • Page 19

    AV-S77 IC4 : YSS918D-F AC3Dav VDD2 SDWCK0 SDWCK1 SDBCK0 SDBCK1 SDIA0 SDOB0 SDIA1 SDOB1 RAMA1 SDOB2 RAMA0 RAMA7 RAMWEN RAMA8 RAMOEN RAMA9 VDD2 VDD2 IPORT7 OPORT7 IPORT6 OPORT6 IPORT5 OPORT5 IPORT4 OPORT4 IPORT3 OPORT3 IPORT2 OPORT2 IPORT1 OPORT1 IPORT0 OPORT0...

  • Page 20

    AV-S77 IC4 : YSS918D-F AC3Dav Name Function +5V power supply (for terminal section) RAMCEN External SRAM chip enable terminal RAMA16 External SRAM address terminal 16 RAMA15 External SRAM address terminal 15 SDIB0 PCM input terminal 0 to Sub DSP SDIB1...

  • Page 21

    AV-S77 IC4 : YSS918D-F AC3Dav Name Function AC-3 CRC error detect terminal MUTE Auto mute detect terminal KARAOKE AC-3 KARAOKE data detect terminal SURENC AC-3 2/0 mode Dolby surround encode input detect terminal /SDBCK0 SDBCK0 invert clock output terminal RAMA6...

  • Page 22

    AV-S77 µ IC200 : M30217MA-A208FP (16 bit -COM) P67/FLD7 P24/FLD36 P66/FLD6 P25/FLD37 P65/FLD5 P26/FLD38 P64/FLD4 P27/FLD39 P63/FLD3 P30/FLD40 P62/FLD2 P31/FLD41 P61/FLD1 P32/FLD42 P60/FLD0 P33/FLD43 P34/FLD44 P107/AN7 P35/FLD45 P106/AN6 P36/FLD46 P105/AN5 P37/FLD47 P104/AN4 P40/FLD48 P103/AN3 P41/FLD49 P102/AN2 P42/FLD50 P101/AN1 P43/FLD51 AVSS...

  • Page 23

    AV-S77 µ IC200 : M30217MA-A208FP (16 bit -COM) PORT Name IN/OUT Function CMOS (DSP) /IC AC3D OUT (/ICAC) CLK1 S-CLK (DSP) AC3D CLK OUT(CLKAC) (Serial I/O-1) RxD1 S-IN (DSP) AC3D DATA IN(RXAC) (Serial I/O-1) TxD1 S-OUT (DSP) AC3D DATA OUT(TXAC)

  • Page 24

    AV-S77 µ IC200 : M30217MA-A208FP (16 bit -COM) PORT Name IN/OUT Function FLD10 SEGMENT 25 (P25) (VEE internal pull-down) FLD9 SEGMENT 26 (P26) (VEE internal pull-down) FLD8 SEGMENT 27 (P27) (VEE internal pull-down) FLD7 SEGMENT 28 (P28) (VEE internal pull-down)

  • Page 25: Display Data

    AV-S77 I DISPLAY DATA G V200 : 13-BT-180GNK (V629140) G PIN CONNECTION Pin No. Connection Pin No. Connection Note : 1) F1, F2 ..Filament 2) NP ..No pin 3) NX ..No extended pin 4) DL ..Datum Line 5) 1G ~ 13G ..

  • Page 26: Block Diagram

    AV-S77 I BLOCK DIAGRAM Input Selector Unit & DSP Unit...

  • Page 27

    AV-S77 µ-COM & Power Supply Signal Detect For Auto Power CB202 M-SENSOR For Flash Writer CONTROL OPERATION P.C.B. MAIN P.C.B. 6ch Selector CONTROL /6ch Volume INPUT Selector IC201 PROM XL200 U200 10 11 REMOTE Power Down Detect SENSOR +B12V Q209/D206/D207...

  • Page 28

    AV-S77 Subwoofer & Rear Amplifier IC13 UPC4570 UPC4570 UPC4570 STK404-050 Sub Woofer CURRENT IC4/IC5 DETECTOR 9 0 A UPC4570 6 7 8 SW-PRT 1 2 3 4 UPC4570 LM1875T Rear Speaker Lch DC Signal Detect MUTE Q9/Q10 JK2 B Rear Speaker Rch...

  • Page 29

    AV-S77 I AV-S77C PRINTED CIRCUIT BOARD (Foil side) To OPERATION To DSP (Lead Type Device 1/2) MAIN P. C. B. • Semiconductor Location Ref. No. Location Ref. No. Location Ref. No. Location D300 D313 IC312 D302 D314 IC313 D303 D315...

  • Page 30

    AV-S77 I AV-S77C PRINTED CIRCUIT BOARD (Foil side) (Lead Type Device 2/2) MAIN P. C. B. SPEAKERS SYSTEM CONNECTOR CENTER SURROUND MAIN THROUGH VIDEO To SPEAKER R J model only WRITER To SPEAKER L • Semiconductor Location To OPERATION Ref. No.

  • Page 31: Printed Circuit Board

    AV-S77 • Semiconductor Location I AV-S77C PRINTED CIRCUIT BOARD (Foil side) Ref. No. Location From MAIN D200 D201 D204 OPERATION P. C. B. (Lead Type Device) D205 D206 D207 TEST MODE (for factory check) IC200 From MAIN IC201 Q200 Q201...

  • Page 32: Printed Circuit Board

    AV-S77 I AV-S77C PRINTED CIRCUIT BOARD (Component side) (Lead Type Device) (Surface Mount Device) DSP P. C. B. DSP P. C. B. From OPERATION From MAIN • Semiconductor Location Ref. No. Location IC10 IC11 IC12 IC14 IC15 OPTICAL 2 OPTICAL 1...

  • Page 33

    AV-S77 • Semiconductor Location I NX-SW77 PRINTED CIRCUIT BOARD (Foil side) Ref. No. Location (Lead Type Device) (Lead Type Device) AMP (C) P. C. B. AMP (D) P. C. B. From POWER (A) AMP (F) IC10 IC11 IC12 IC13 From...

  • Page 34

    AV-S77 I NX-SW77 PRINTED CIRCUIT BOARD (Component side) • Semiconductor Location (Lead Type Device) (Lead Type Device) POWER (A) P. C. B. POWER (B) P. C. B. Ref. No. Location To AMP (D) +12V -12V AMPG AMP (C) AMP (E)

  • Page 35

    AV-S77 AV-S77C SCHEMATIC DIAGRAM (MAIN) FROM DSP Page 44 PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. MAIN L 2SC2878 2SA1674 2SK304 DTA114ES 11.9 11.9 11.9 1SR139 S1NB20 1SS133 MTZJ5.1B MTZJ6.2B -5.1 INPUT -11.4 MAIN L MTZJ27.0B -11.6 Anode (FRONT L) –...

  • Page 36

    AV-S77 AV-S77C SCHEMATIC DIAGRAM (OPERATION) IC201 : S-29390AFJA CMOS 4kbit Serial EEPROM Memory array Address decoder Data register Output buffer TEST Mode decode logic Clock generator Point 3 Pin 13 of IC200 -25.1 SYSTEM CONRTOL -25.3 EEP ROM RESET 11.4 11.5...

  • Page 37

    AV-S77 AV-S77C SCHEMATIC DIAGRAM (DSP) Point 1 Pin 13 of IC3 SELECTOR MAIN L (FRONT L) 12.0 -11.7 Point 2 Pin 28 of IC6 PLL CONT 12.0 ADC/DAC -11.7 LFE (SW) PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. 2SC3326 ISS355 µPC29M33T-E1...

  • Page 38

    AV-S77 NX-SW77 SCHEMATIC DIAGRAM (AMP) IC1~5: µPC4570HA Dual OP-Amp 24.7 REAR L 11.8 SPEAKERS 24.8 -11.6 -25.0 Vcc Vo -11.4 IC8, 9, 11, 12 : LM1875T Power Amp – DC SIGNAL DETECT REAR -11.4 SPEAKER RELAY 24.8 IC10: M5218AL Headphone Amp.

  • Page 39

    AV-S77 NX-SW77 SCHEMATIC DIAGRAM (POWER) TO AMP Page 45 TO AMP Page 45 TO AMP Page 45 TO AMP Page 45 TO AMP Page 45 PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. 2SC1740S 1SR139 RBV-602 NJM78M12FA NJM79M12FA 1SS133 MTZJ5.6B Anode –...

  • Page 40: Parts List

    AV-S77 I WARNING PARTS LIST Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally in- stalled. I ELECTRICAL PARTS Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTS List.

  • Page 41

    AV-S77 AV-S77C P.C.B. AMP & P.C.B. DSP-FL Schm PART Description Remarks Schm PART Description Remarks Ref. Ref. AAX28220 P.C.B. 339148 AAX11210 C.POL 1500pF 065028 AAX28200 P.C.B. DSP-FL 338951 AAX10160 C.EL 10uF 066286 US061330 C.CE.CHP 33pF 065487 AAX11240 C.POL 3300pF 065087 US145100 C.CE.CHP...

  • Page 42

    AV-S77 AV-S77C P.C.B. AMP & P.C.B. DSP-FL Schm PART Description Remarks Schm PART Description Remarks Ref. Ref. C208 US061330 C.CE.CHP 33pF 065487 C364 AAX09970 C.CE 0.01uF 049191 C209 US061330 C.CE.CHP 33pF 065487 C365 AAX09970 C.CE 0.01uF 049191 C210 US061330 C.CE.CHP...

  • Page 43: Schematic Diagram

    AV-S77 AV-S77C P.C.B. AMP & P.C.B. DSP-FL Schm PART Description Remarks Schm PART Description Remarks Ref. Ref. CN310 AAX28400 5569-04A1 BLK 081867 s IC315 AAX12000 NJM79M12FA 070447 XX698570 DIODE ISS355 069444 IC316 XB247A00 uPC4570HA 070111 XX698570 DIODE ISS355 069444 JK300 AAX28530 JACK.RCA...

  • Page 44

    AV-S77 AV-S77C P.C.B. AMP & P.C.B. DSP-FL Chip Resistors Schm PART Description Remarks Schm PART Description Remarks Ref. Ref. HS101 AAX10890 HEAT.SINK UOT-16CS25-MP 055523 RD354470 R.CAR.CHP 47Ω 1/16W 067543 AAX10140 CUSHION 055172 RD354510 R.CAR.CHP 51Ω   1/16W 333377 AAX28480 SPACER LH-5-5...

  • Page 45

    AV-S77 NX-SW77 P.C.B. POWER Schm PART Description Remarks Schm PART Description Remarks Ref. Ref. AAX28240 P.C.B. POWER AMP 338941 AAX12270 C.EL 330uF 066402 AAX12170 C.CE 100pF 051723 AAX12270 C.EL 330uF 066402 AAX12170 C.CE 100pF 051723 AAX12250 C.EL 22uF 066352 AAX12170 C.CE...

  • Page 46

    AV-S77 NX-SW77 P.C.B. POWER Schm PART Description Remarks Schm PART Description Remarks Ref. Ref. C137 AAX11180 C.POL 0.1uF 065007 AAX12190 COIL.CHOKE 1.5uH 074417 C138 AAX11180 C.POL 0.1uF 065007 AAX12190 COIL.CHOKE 1.5uH 074417 C139 AAX11180 C.POL 0.1uF 065007 iC174020 2SC1740S QRS...

  • Page 47

    AV-S77 NX-SW77 P.C.B. POWER Schm PART Description Remarks Schm PART Description Remarks Ref. Ref. * s T1 AAX28510 TRANS SUB A1A1E0-1 337195 XX707320 IPS-5007 064821 XX707320 IPS-5007 064821 XX698880 MET37-00O1 075878 iC174020 2SC1740S QRS 055717 AAX10900 HEAT.SINK DPS35-40 055524 BB070700 GND.MTL...

  • Page 48

    AV-S77 I AV-S77C EXPLODED VIEW I AV-S77C MECHANICAL PARTS Ref. PART Description Remarks Markets AAX28590 FRONT PANEL 338422 AAX28340 GRILLE ASS'Y 338426 AAX28270 WINDOW SHEET WINDOW SHEET 338922 AAX28540 FILTER BLUE 338417 AAX28620 BUTTON POWER 338418 AAX28610 BUTTON OPERATION 338420...

  • Page 49

    AV-S77 I NX-SW77 EXPLODED VIEW I NX-SW77 MECHANICAL PARTS Ref. PART Description Remarks Markets 2-10 XY559A00 DRIVER, WOOFER JA1678 16cm 6Ω 25W 058529 AAX28350 GRILLE ASS'Y 338810 AAX28300 ENCLOSURE 350220 2-10 AAX12290 FOOT 055357 2-15 AAX12120 BIND HEAD TAPPING SCREW...

  • Page 50: Parts List

    AV-S77 Parts List for Carbon Resistors Value 1/4W Type Part No. 1/6W Type Part No. Value 1/4W Type Part No. 1/6W Type Part No. 1.0 Ω 3100 3100 10 kΩ 7100 7100 HJ35 HF85 HF45 HF45 1.8 Ω ❊ 3180 11 kΩ...

  • Page 51: Remote Control Transmitter

    AV-S77 REMOTE CONTROL TRANSMITTER SCHEMATIC DIAGRAM OPEN POD2: P/U POD3 POD1 POD0 OPEN POE0: P/U POC3 OPEN POE1: P/U POC2 2Ω POE2: P/U POC1 SID303C-01 3.0V 47µF POE3: P/U POC0 22Ω POB3 2SC3265 POB2 0.1µF XOUT POB1 POB0 4.00MHz POA3...

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