Service Manual
Page 28
... / ౮ PS protection / Flashing 2 / 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 this unit is turned on ... 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 protection function is at...
... / ౮ PS protection / Flashing 2 / 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 this unit is turned on ... 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 protection function is at...
Service Manual
Page 34
A-S2000 IC504: LC709004A (FRONT P.C.B.) Serial parameter extension Pin Port Name No. 24 P00 23 P01 22 P02 21 P03 20 ... I_BALGAIN I_MT I_MMMC VSS RES VDD CS CLK DIN DOUT I/O Detail of center TAP I LR_BALANCE volume AD I I I I - I Detect head phone insert, H: HP non inserted / L: HP inserted I Balance gain select SW I Detect laver SW for MUTE I Detect laver MMMC, Hi: MC / Low: MM IC501: TC74HC4051AFEL (FRONT P.C.B.) 8-channel analog multiplexer... Bass control O Initial clear extecded IC I BASS volume AD TREBLE volume AD COM out Function selector rotary SW AD MAIN VOLUME AD A-S2000 34
A-S2000 IC504: LC709004A (FRONT P.C.B.) Serial parameter extension Pin Port Name No. 24 P00 23 P01 22 P02 21 P03 20 ... I_BALGAIN I_MT I_MMMC VSS RES VDD CS CLK DIN DOUT I/O Detail of center TAP I LR_BALANCE volume AD I I I I - I Detect head phone insert, H: HP non inserted / L: HP inserted I Balance gain select SW I Detect laver SW for MUTE I Detect laver MMMC, Hi: MC / Low: MM IC501: TC74HC4051AFEL (FRONT P.C.B.) 8-channel analog multiplexer... Bass control O Initial clear extecded IC I BASS volume AD TREBLE volume AD COM out Function selector rotary SW AD MAIN VOLUME AD A-S2000 34
Service Manual
Page 37
... PSVA1 PSVA2 1,64 62,63 48 47 60 PRV1 PRV BALANCE UNBALANCE CONVERTER HP END LOW IMPEDANCE DRIVE HEADPHONE AMP. COLD(-) RY401 IC413 IC302 IC303 RY403 FLOATING BALANCED POWER AMPLIFIER FRONT • See page 64-66 → SCHEMATIC DIAGRAM SPEAKER DRIVER HOT... (POSITIVE PHASE) SIDE SPCH A L/R CH RY201/R111 SPCH B L/R CH RY202/R112 RY_SPA RY_SPB SPEAKERS L/R CH + A - + B - A B C D E F G H I J A-S2000 1 I BLOCK DIAGRAM BALANCE •...
... PSVA1 PSVA2 1,64 62,63 48 47 60 PRV1 PRV BALANCE UNBALANCE CONVERTER HP END LOW IMPEDANCE DRIVE HEADPHONE AMP. COLD(-) RY401 IC413 IC302 IC303 RY403 FLOATING BALANCED POWER AMPLIFIER FRONT • See page 64-66 → SCHEMATIC DIAGRAM SPEAKER DRIVER HOT... (POSITIVE PHASE) SIDE SPCH A L/R CH RY201/R111 SPCH B L/R CH RY202/R112 RY_SPA RY_SPB SPEAKERS L/R CH + A - + B - A B C D E F G H I J A-S2000 1 I BLOCK DIAGRAM BALANCE •...
Service Manual
Page 48
...Location Ref no . ass'y • Semiconductor Location Ref no . Location Ref no . Location Ref no . Location Ref no . Location Ref no . Location Ref no . A B C D E F G H I J A-S2000 1 MAIN (2) P.C.B. (Side A) 2 3 INLAGND INL+ FUNCTION (2) (CB406) 4 LSP_P LSP_N 5 FRONT (13) (W201A, W201B) CB84 W202 MAIN (1) (CB54) -B4 +B4 +B3 -B3 +PB AGND AGND -PB ...MAIN (1) (W103) +5M MG THMR HPRRDR PRIR PRDR +5M MG THMR THML HPPRDR HPPRDL PRIR PRIL PRDR PRDL FRONT (1) (CB521) HPR HPRGND MAIN (1) (W104) HP GND HP GND HP GND MAIN (3) (W318) HPL GND HPR FRONT (2) (CB504)
...Location Ref no . ass'y • Semiconductor Location Ref no . Location Ref no . Location Ref no . Location Ref no . Location Ref no . Location Ref no . A B C D E F G H I J A-S2000 1 MAIN (2) P.C.B. (Side A) 2 3 INLAGND INL+ FUNCTION (2) (CB406) 4 LSP_P LSP_N 5 FRONT (13) (W201A, W201B) CB84 W202 MAIN (1) (CB54) -B4 +B4 +B3 -B3 +PB AGND AGND -PB ...MAIN (1) (W103) +5M MG THMR HPRRDR PRIR PRDR +5M MG THMR THML HPPRDR HPPRDL PRIR PRIL PRDR PRDL FRONT (1) (CB521) HPR HPRGND MAIN (1) (W104) HP GND HP GND HP GND MAIN (3) (W318) HPL GND HPR FRONT (2) (CB504)
Service Manual
Page 50
... work, perform discharge by connecting a discharge resistor (5k-ohms/ 10W) between terminals at following positions. C309 on MAIN (3) P.C.B.. 4. A B A-S2000 1 MAIN (3) P.C.B. (Side A) 2 3 POWER TRANSFORMER Blue Brown Black Red RED Black RED 4 POWER TRANSFORMER 5 HP GND HP GND HP GND MAIN (2) (CB52) 6 7 50 W316 W314 W315 W318 C D E F G H I J Safety measures • Some internal parts in this product...
... work, perform discharge by connecting a discharge resistor (5k-ohms/ 10W) between terminals at following positions. C309 on MAIN (3) P.C.B.. 4. A B A-S2000 1 MAIN (3) P.C.B. (Side A) 2 3 POWER TRANSFORMER Blue Brown Black Red RED Black RED 4 POWER TRANSFORMER 5 HP GND HP GND HP GND MAIN (2) (CB52) 6 7 50 W316 W314 W315 W318 C D E F G H I J Safety measures • Some internal parts in this product...