Service Manual
Page 7
... (16-7/16") (7/8") 22 137 (5-3/8") 121 (4-3/4") (5/8") 1 6 (1/8") 3 435 (17-1/8") Unit: mm (inch) ୯ҐɿNNʢΠϯνʣ 7 A-S2000 U .......... General model T .......... to SP OUT 0.02 % Signal to Noise Ratio IHF-A Network) (Input shorted) CD, etc. (150 mV 98 dB PHONO MM (5 mV ... MC 100 µV/50 ohms MAIN IN 1 V/47 k-ohms Output Level/ Output Impedance REC OUT 150 mV/1.5 k ohms PRE OUT 1 V/1.5 k ohms Headphone Rated Output 1 kHz, 0.2 % THD, 32 ohms 30 mW Channel Separation 1 kHz/10 kHz) CD, etc. (5.1 k-ohms terminated 74/54 dB or...
... (16-7/16") (7/8") 22 137 (5-3/8") 121 (4-3/4") (5/8") 1 6 (1/8") 3 435 (17-1/8") Unit: mm (inch) ୯ҐɿNNʢΠϯνʣ 7 A-S2000 U .......... General model T .......... to SP OUT 0.02 % Signal to Noise Ratio IHF-A Network) (Input shorted) CD, etc. (150 mV 98 dB PHONO MM (5 mV ... MC 100 µV/50 ohms MAIN IN 1 V/47 k-ohms Output Level/ Output Impedance REC OUT 150 mV/1.5 k ohms PRE OUT 1 V/1.5 k ohms Headphone Rated Output 1 kHz, 0.2 % THD, 32 ohms 30 mW Channel Separation 1 kHz/10 kHz) CD, etc. (5.1 k-ohms terminated 74/54 dB or...
Service Manual
Page 20
L ch VR202 FRONT (2) P.C.B. R ch VR102 L ch DC -2.0 to +2.0 mV 20 Fig. 2 PHONES MAIN (2) P.C.B. R ch L ch DC -2.0 to +2.0 mV R ch A-S2000 G Headphone DC Offset Adjustment Condition • Start adjustment 5 sec or more after the power is turned on. • No input signal. • Non loaded condition DC ...
L ch VR202 FRONT (2) P.C.B. R ch VR102 L ch DC -2.0 to +2.0 mV 20 Fig. 2 PHONES MAIN (2) P.C.B. R ch L ch DC -2.0 to +2.0 mV R ch A-S2000 G Headphone DC Offset Adjustment Condition • Start adjustment 5 sec or more after the power is turned on. • No input signal. • Non loaded condition DC ...
Service Manual
Page 29
... HPPRDL (FRONT P.C.B. 62 pin of microprocessor IC502) HPPRDR (FRONT P.C.B. 63 pin of microprocessor IC502) Detected at : PRDL (Headphone amplifier output Lch of MAIN P.C.B.) PRDR (Headphone amplifier output Rch of MAIN P.C.B.) • I protection L/Rch, it will be possible to an I protection L/Rch Cause : Excess...; 08ʢ7ʣ 13*-ʢ'30/5 1 13*3ʢ'30/5 1 13*-ʢ."*/1 DIʣ 13*3ʢ."*/1 3DIʣ A-S2000 • TMP protection L/Rch Cause : Abnormal temperature of heat sink Normal value : 0.200 to the ON position. If the...
... HPPRDL (FRONT P.C.B. 62 pin of microprocessor IC502) HPPRDR (FRONT P.C.B. 63 pin of microprocessor IC502) Detected at : PRDL (Headphone amplifier output Lch of MAIN P.C.B.) PRDR (Headphone amplifier output Rch of MAIN P.C.B.) • I protection L/Rch, it will be possible to an I protection L/Rch Cause : Excess...; 08ʢ7ʣ 13*-ʢ'30/5 1 13*3ʢ'30/5 1 13*-ʢ."*/1 DIʣ 13*3ʢ."*/1 3DIʣ A-S2000 • TMP protection L/Rch Cause : Abnormal temperature of heat sink Normal value : 0.200 to the ON position. If the...
Service Manual
Page 37
...48 47 60 PRV1 PRV BALANCE UNBALANCE CONVERTER HP END LOW IMPEDANCE DRIVE HEADPHONE AMP. RY_HP RY_BAL 32 IC502 17 5 RY_CD 26 RY_TU 27 RY_L1 28...PSVA1 PSVA2 +12V to POWER AMP. COLD(-) RY401 IC413 IC302 IC303 RY403 FLOATING BALANCED POWER AMPLIFIER FRONT • See page 64-66 → SCHEMATIC DIAGRAM SPEAKER DRIVER HOT (POSITIVE ...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 • See page 59 → SCHEMATIC DIAGRAM CD BAL L/R HOT (POSITIVE PHASE) BUFFER AMP. MAIN IN IC405...
...48 47 60 PRV1 PRV BALANCE UNBALANCE CONVERTER HP END LOW IMPEDANCE DRIVE HEADPHONE AMP. RY_HP RY_BAL 32 IC502 17 5 RY_CD 26 RY_TU 27 RY_L1 28...PSVA1 PSVA2 +12V to POWER AMP. COLD(-) RY401 IC413 IC302 IC303 RY403 FLOATING BALANCED POWER AMPLIFIER FRONT • See page 64-66 → SCHEMATIC DIAGRAM SPEAKER DRIVER HOT (POSITIVE ...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 • See page 59 → SCHEMATIC DIAGRAM CD BAL L/R HOT (POSITIVE PHASE) BUFFER AMP. MAIN IN IC405...