Service Manual
Page 1
... work before you apply power to the industry, and more specifically YAMAHA Products, are subject to change without permission. I CONTENTS TO SERVICE PERSONNEL 2 FRONT PANEL 2 REAR PANELS 3-5 REMOTE CONTROL PANELS 6 SPECIFICATIONS 7 INTERNAL VIEW 8 SERVICE PRECAUTIONS 9 DISASSEMBLY PROCEDURES 9-18 AMP ADJUSTMENT 19-20 UPDATING FIRMWARE 21-27 SELF-DIAGNOSTIC FUNCTION 28-30 IC DATA 31-34 PIN CONNECTION DIAGRAMS 35-36 BLOCK DIAGRAM 37 PRINTED CIRCUIT BOARDS 38-58 SCHEMATIC DIAGRAMS 59-66 REPLACEMENT PARTS LIST 67-87 REMOTE CONTROL...
... work before you apply power to the industry, and more specifically YAMAHA Products, are subject to change without permission. I CONTENTS TO SERVICE PERSONNEL 2 FRONT PANEL 2 REAR PANELS 3-5 REMOTE CONTROL PANELS 6 SPECIFICATIONS 7 INTERNAL VIEW 8 SERVICE PRECAUTIONS 9 DISASSEMBLY PROCEDURES 9-18 AMP ADJUSTMENT 19-20 UPDATING FIRMWARE 21-27 SELF-DIAGNOSTIC FUNCTION 28-30 IC DATA 31-34 PIN CONNECTION DIAGRAMS 35-36 BLOCK DIAGRAM 37 PRINTED CIRCUIT BOARDS 38-58 SCHEMATIC DIAGRAMS 59-66 REPLACEMENT PARTS LIST 67-87 REMOTE CONTROL...
Service Manual
Page 2
... contact between solder and your hands before handling food. A-S2000 I FRONT PANEL A-S2000 (U, C, R, T, K, A, B, G, L, J models) A-S2000 2 WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE G Leakage current must be equivalent to verify that all exposed conductive surfaces are soldered using the lead free solder. Critical Components Information Components having specifications equal to each solder. If you come in contact with...
... contact between solder and your hands before handling food. A-S2000 I FRONT PANEL A-S2000 (U, C, R, T, K, A, B, G, L, J models) A-S2000 2 WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE G Leakage current must be equivalent to verify that all exposed conductive surfaces are soldered using the lead free solder. Critical Components Information Components having specifications equal to each solder. If you come in contact with...
Service Manual
Page 7
... dB or more PHONO (Input shorted, Vol: -30 dB) MM 90/77 dB or more MC 66/77 dB or more Tone Control Characteristics BASS Boost/Cut (50 Hz 9 dB Turnover frequency 350 Hz TREBLE Boost/Cut (20 Hz 9 dB Turnover frequency 3.5 kHz Audio Muting 20 dB (approx.) I Audio Section Minimum RMS Output Power (Power Amp. U .......... Singapore model J Japanese model • DIMENSIONS / ੇ๏...
... dB or more PHONO (Input shorted, Vol: -30 dB) MM 90/77 dB or more MC 66/77 dB or more Tone Control Characteristics BASS Boost/Cut (50 Hz 9 dB Turnover frequency 350 Hz TREBLE Boost/Cut (20 Hz 9 dB Turnover frequency 3.5 kHz Audio Muting 20 dB (approx.) I Audio Section Minimum RMS Output Power (Power Amp. U .......... Singapore model J Japanese model • DIMENSIONS / ੇ๏...
Service Manual
Page 9
...;- I DISASSEMBLY PROCEDURES (Remove parts in this product contain high volt- Before starting any repair work, perform discharge by connecting a discharge resistor (5k-ohms/10W) between terminals at following positions. Lift the panel side L a little and release 3 hooks. Set the "PHONO MM/MC" switch to remove 3 knob TC unit. (Fig. 1) d. ages and are dangerous even after the power is turned off because an...
...;- I DISASSEMBLY PROCEDURES (Remove parts in this product contain high volt- Before starting any repair work, perform discharge by connecting a discharge resistor (5k-ohms/10W) between terminals at following positions. Lift the panel side L a little and release 3 hooks. Set the "PHONO MM/MC" switch to remove 3 knob TC unit. (Fig. 1) d. ages and are dangerous even after the power is turned off because an...
Service Manual
Page 10
... the front panel. Install the knob SEL unit with the "VOLUME MAX" position. • Turn the knob VOL unit counterclockwise fully and check that state. (Fig. 2) * At this time, do not tighten the lock set screw of BALANCE as an example. e. a. G When installing the knob TC unit * Use the same installation procedure for BASS, TREBLE and BALANCE. b. A-S2000 G When installing the knob...
... the front panel. Install the knob SEL unit with the "VOLUME MAX" position. • Turn the knob VOL unit counterclockwise fully and check that state. (Fig. 2) * At this time, do not tighten the lock set screw of BALANCE as an example. e. a. G When installing the knob TC unit * Use the same installation procedure for BASS, TREBLE and BALANCE. b. A-S2000 G When installing the knob...
Service Manual
Page 22
A-S2000 G Operation Procedures 1. Set the switch (SW301) of RS232C conversion adapter to [DISASSEMBLY PROCEDURS]) 3. Turn off the power of this unit to the serial port (RS232C) of this unit and disconnect the power cable from the AC outlet. 2. Remove the panel side L/R and top cover. (Refer to the "FLASH UCOM" side. (Fig. 1) 4. Connect the writing port of the PC with RS232C cross cable, RS232C conversion adapter and flexible...
A-S2000 G Operation Procedures 1. Set the switch (SW301) of RS232C conversion adapter to [DISASSEMBLY PROCEDURS]) 3. Turn off the power of this unit to the serial port (RS232C) of this unit and disconnect the power cable from the AC outlet. 2. Remove the panel side L/R and top cover. (Refer to the "FLASH UCOM" side. (Fig. 1) 4. Connect the writing port of the PC with RS232C cross cable, RS232C conversion adapter and flexible...
Service Manual
Page 27
Set the POWER ON/OFF switch to the OFF position to the factory setting (INPUT: CD BAL). 1. The INPUT selector LED "CD BAL" will light up and the normal operation will be restored. (Fig. 7) 3. A-S2000 G Factory Reset Set back to end. 165 6%*0 .65 108&30/ 0 0 JHʣ */165 JHʣ ʠ108&30/0 0 "BALANCE" knob "POWER ON/OFF" switch Fig. 7 "BALANCE" knob "AUDIO MUTE" switch A-S2000 27 Turn the "BALANCE" knob clockwise fully and then while pressing down the "AUDIO MUTE" switch, set the "POWER ON/OFF" switch to the ON position. (Fig. 7) 2.
Set the POWER ON/OFF switch to the OFF position to the factory setting (INPUT: CD BAL). 1. The INPUT selector LED "CD BAL" will light up and the normal operation will be restored. (Fig. 7) 3. A-S2000 G Factory Reset Set back to end. 165 6%*0 .65 108&30/ 0 0 JHʣ */165 JHʣ ʠ108&30/0 0 "BALANCE" knob "POWER ON/OFF" switch Fig. 7 "BALANCE" knob "AUDIO MUTE" switch A-S2000 27 Turn the "BALANCE" knob clockwise fully and then while pressing down the "AUDIO MUTE" switch, set the "POWER ON/OFF" switch to the ON position. (Fig. 7) 2.
Service Manual
Page 28
...;໓ PS AMP protection 1/2 / Flashing 3 AMP DC protection L/R ch / 3DI Flashing 4 HP DC protection L/R ch / Flashing 5 / 3DI ໓ I SELF-DIAGNOSTIC FUNCTION G Protection Information Display When the power to the ON position. 6%*0 .65 108&30/ 0 0/ʹ͠·͢ɻ POWER indicator "BALANCE" knob A-S2000 "POWER ON/OFF" switch "BALANCE" knob "AUDIO MUTE" switch • List of protection information The type of FUNCTION P.C.B.) does not turn on. 108&3 6/$5*0/1$#ͷ3 • Operation procedures Turn the...
...;໓ PS AMP protection 1/2 / Flashing 3 AMP DC protection L/R ch / 3DI Flashing 4 HP DC protection L/R ch / Flashing 5 / 3DI ໓ I SELF-DIAGNOSTIC FUNCTION G Protection Information Display When the power to the ON position. 6%*0 .65 108&30/ 0 0/ʹ͠·͢ɻ POWER indicator "BALANCE" knob A-S2000 "POWER ON/OFF" switch "BALANCE" knob "AUDIO MUTE" switch • List of protection information The type of FUNCTION P.C.B.) does not turn on. 108&3 6/$5*0/1$#ͷ3 • Operation procedures Turn the...
Service Manual
Page 29
... "AUDIO MUTE" switch, set the "POWER ON/OFF" switch to the ON position. At this unit with a failure un-repaired and the protection function disabled, the protection function does not work even in a dangerous state, possibly resulting further in damage. Use special care when using this mode. • When the protection function works due to an I protection L/Rch Cause : Excess current flow into amplifier Normal value : LOW (0V) Detection port : PRIL...
... "AUDIO MUTE" switch, set the "POWER ON/OFF" switch to the ON position. At this unit with a failure un-repaired and the protection function disabled, the protection function does not work even in a dangerous state, possibly resulting further in damage. Use special care when using this mode. • When the protection function works due to an I protection L/Rch Cause : Excess current flow into amplifier Normal value : LOW (0V) Detection port : PRIL...
Service Manual
Page 30
... "BALANCE" knob G Factory Reset Set back to the factory setting (INPUT: CD BAL). • Operation procedures Turn the "BALANCE" knob clockwise fully and then while pressing down the "AUDIO MUTE" switch, set the "POWER ON/OFF" switch to end. 165 6%*0 .65 108&30/ 0 0 165 108&30/0 0 "BALANCE" knob "POWER ON/OFF" switch "TREBLE" knob "BALANCE" knob "AUDIO MUTE" switch MAIN DIRECT (26 = 64) 0 0 0 0 0 0 0 Input selector LED / */165 Binary number (BCD) [Lit: 1, Off...
... "BALANCE" knob G Factory Reset Set back to the factory setting (INPUT: CD BAL). • Operation procedures Turn the "BALANCE" knob clockwise fully and then while pressing down the "AUDIO MUTE" switch, set the "POWER ON/OFF" switch to end. 165 6%*0 .65 108&30/ 0 0 165 108&30/0 0 "BALANCE" knob "POWER ON/OFF" switch "TREBLE" knob "BALANCE" knob "AUDIO MUTE" switch MAIN DIRECT (26 = 64) 0 0 0 0 0 0 0 Input selector LED / */165 Binary number (BCD) [Lit: 1, Off...
Service Manual
Page 37
... 15 3,4 9-11 SUB-TRANSFORMER T1 D304 D336 for COLD 6 (for POWER AMP / VOLTAGE AMP STAGE) R CH +B1/-B1 POWER SWITCH D300 for HOT JK501 for MICROPROCESSOR I_BAS 5 I_TRE 4 I_LRBAL 12 I_SEL 2 I_VOL 1 RY1 SPEAKER TRIM BASS REMOTE TREBLE INPUT SEL BALANCE VOLUME VR501 7 FRONT • See page 64-66 → SCHEMATIC DIAGRAM FRONT PANEL AC IN FUNCTION • See page 60-62 → SCHEMATIC DIAGRAM D301 PRV...
... 15 3,4 9-11 SUB-TRANSFORMER T1 D304 D336 for COLD 6 (for POWER AMP / VOLTAGE AMP STAGE) R CH +B1/-B1 POWER SWITCH D300 for HOT JK501 for MICROPROCESSOR I_BAS 5 I_TRE 4 I_LRBAL 12 I_SEL 2 I_VOL 1 RY1 SPEAKER TRIM BASS REMOTE TREBLE INPUT SEL BALANCE VOLUME VR501 7 FRONT • See page 64-66 → SCHEMATIC DIAGRAM FRONT PANEL AC IN FUNCTION • See page 60-62 → SCHEMATIC DIAGRAM D301 PRV...
Service Manual
Page 59
... 60 K2 to FUNCTION (1)_W3005 Page 60 K2 to FUNCTION (1)_W3006 IC201: NJM2068MD-TE2 Dual operational amplifier OUT1 1 -IN1 2 +IN1 3 -VCC 4 +- +- 8 +VCC 7 OUT2 6 -IN2 5 +IN2 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice...
... 60 K2 to FUNCTION (1)_W3005 Page 60 K2 to FUNCTION (1)_W3006 IC201: NJM2068MD-TE2 Dual operational amplifier OUT1 1 -IN1 2 +IN1 3 -VCC 4 +- +- 8 +VCC 7 OUT2 6 -IN2 5 +IN2 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice...
Service Manual
Page 60
...;/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 60 J K L W3006 W3005 Page 59 I7 to BALANCE_CB202 W3003 Page 59 I5 to BALANCE_CB201 W3001 Page 61 J4 to FUNCTION (2)_CB403 Page 61 B6 to FUNCTION (2)_CB402 W3002 Page 61...
...;/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 60 J K L W3006 W3005 Page 59 I7 to BALANCE_CB202 W3003 Page 59 I5 to BALANCE_CB201 W3001 Page 61 J4 to FUNCTION (2)_CB403 Page 61 B6 to FUNCTION (2)_CB402 W3002 Page 61...
Service Manual
Page 61
...FUNCTION (2) IC401-406: OP275GSR Dual bipolar/JFET, audio operational amplifier OUT A 1 -IN A 2 +IN A 3 V- 4 8 V+ 7 OUT B 6 -IN B 5 +IN B IC413: NJM2068MD-TE2 Dual operational amplifier OUT1 1 -IN1 2 +IN1 3 -VCC 4 +- +- 8 +VCC 7 OUT2 6 -IN2 5 +IN2 IC407-412: TC94A81UG Electronic volume control... shift register Timing gene Test and Power ON reset Level shift Latch Zero crossing ...# Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 61
...FUNCTION (2) IC401-406: OP275GSR Dual bipolar/JFET, audio operational amplifier OUT A 1 -IN A 2 +IN A 3 V- 4 8 V+ 7 OUT B 6 -IN B 5 +IN B IC413: NJM2068MD-TE2 Dual operational amplifier OUT1 1 -IN1 2 +IN1 3 -VCC 4 +- +- 8 +VCC 7 OUT2 6 -IN2 5 +IN2 IC407-412: TC94A81UG Electronic volume control... shift register Timing gene Test and Power ON reset Level shift Latch Zero crossing ...# Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 61
Service Manual
Page 62
... electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 62 -11.9 -11.9 5.0 0 12.2 -11.9 12.2 12.0 12.0 -11.9 0 0 W3 Page 59 I3 to BALANCE_CB203 W4 Page 66 H6 to FRONT (13)_CB79 FUNCTION (3) IC51: NJM7812FA Voltage regulator INPUT OUTPUT COMMON IC52...
... electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 62 -11.9 -11.9 5.0 0 12.2 -11.9 12.2 12.0 12.0 -11.9 0 0 W3 Page 59 I3 to BALANCE_CB203 W4 Page 66 H6 to FRONT (13)_CB79 FUNCTION (3) IC51: NJM7812FA Voltage regulator INPUT OUTPUT COMMON IC52...
Service Manual
Page 63
.... 0 Before starting any repair work, perform discharge by connecting a discharge resistor (5k-ohms/10W) between terminals at following positions. C308 on MAIN (3) P.C.B.. 4. C335 on MAIN (3) P.C.B.. 2. The time required for LЊ8 discharging is subject to those originally installed. 3. MAINʢ3ʣP.C.B.ͷ$ # Components having specifications equal to change without notice. 4. MAINʢ3ʣP.C.B.ͷ$ with parts having special characteristics...
.... 0 Before starting any repair work, perform discharge by connecting a discharge resistor (5k-ohms/10W) between terminals at following positions. C308 on MAIN (3) P.C.B.. 4. C335 on MAIN (3) P.C.B.. 2. The time required for LЊ8 discharging is subject to those originally installed. 3. MAINʢ3ʣP.C.B.ͷ$ # Components having specifications equal to change without notice. 4. MAINʢ3ʣP.C.B.ͷ$ with parts having special characteristics...
Service Manual
Page 64
... PS Reset input RESET 27 CNVSS 26 Timer 1 (8) Prescaler 12 (8) Timer 2 (8) CNTR0 CNTR1 CNTR2 Prescaler X (8) Prescaler Y (8) Timer X (8) Timer Y (8) Timer Z (16) PHONES 0 5.1 5.0 Page 63 K8 to MAIN (2)_W204 10 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is...
... PS Reset input RESET 27 CNVSS 26 Timer 1 (8) Prescaler 12 (8) Timer 2 (8) CNTR0 CNTR1 CNTR2 Prescaler X (8) Prescaler Y (8) Timer X (8) Timer Y (8) Timer Z (16) PHONES 0 5.1 5.0 Page 63 K8 to MAIN (2)_W204 10 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is...
Service Manual
Page 65
... 0.7 25.7 9 10 J K L M N A-S2000 20.9 20.9 0.6 0 25.7 25.7 0.6 0.6 0 0 -0.5 -20.7 -20.7 0 0.5 0.5 -25.2 W1001 Page 66 G3 to FRONT (11)_CB27 W1002 Page 60 B3 to FUNCTION (1)_CB301 -11.8 11.9 -11.8 -11.8 -11....8 11.9 FRONT (10) W1003 Page 60 K9 to FUNCTION (1)_CB305 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change...
... 0.7 25.7 9 10 J K L M N A-S2000 20.9 20.9 0.6 0 25.7 25.7 0.6 0.6 0 0 -0.5 -20.7 -20.7 0 0.5 0.5 -25.2 W1001 Page 66 G3 to FRONT (11)_CB27 W1002 Page 60 B3 to FUNCTION (1)_CB301 -11.8 11.9 -11.8 -11.8 -11....8 11.9 FRONT (10) W1003 Page 60 K9 to FUNCTION (1)_CB305 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change...
Service Manual
Page 66
... Page 62 H8 to FUNCTION (3)_W4 W12A 8 W12B W12C W12D To POWER TRANSFORMER 8P 9 620mm Page 62 G2 to FUNCTION (3)_CB2 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. 10 # Schematic diagram is subject to change without notice. 66 W8A...
... Page 62 H8 to FUNCTION (3)_W4 W12A 8 W12B W12C W12D To POWER TRANSFORMER 8P 9 620mm Page 62 G2 to FUNCTION (3)_CB2 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. 10 # Schematic diagram is subject to change without notice. 66 W8A...
Service Manual
Page 67
A-S2000 I REPLACEMENT PARTS LIST • ELECTRICAL COMPONENT PARTS WARNING G Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. SURG.PRTCT : SURGE PROTECTOR SW.TACT : TACT SWITCH SW.LEAF : LEAF SWITCH SW.LEVER : LEVER SWITCH SW.MICRO : MICRO SWITCH SW.PUSH : PUSH SWITCH SW.RT.ENC : ROTARY ENCODER SW.RT.MTR : ROTARY SWITCH WITH MOTOR SW.RT : ROTARY...
A-S2000 I REPLACEMENT PARTS LIST • ELECTRICAL COMPONENT PARTS WARNING G Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. SURG.PRTCT : SURGE PROTECTOR SW.TACT : TACT SWITCH SW.LEAF : LEAF SWITCH SW.LEVER : LEVER SWITCH SW.MICRO : MICRO SWITCH SW.PUSH : PUSH SWITCH SW.RT.ENC : ROTARY ENCODER SW.RT.MTR : ROTARY SWITCH WITH MOTOR SW.RT : ROTARY...
