Phonic_T8200_Signal_Processor_Service_Manual 电路图.pdf

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1、SIGNAL PROCESSOR 8200T8200 RadioFans.CN 收音机爱 好者资料库 PHONIC CORPORATION PANEL LAYOUT Page 4Page 3 T8200 SERVICE MANUAL 211-12300-040-0 AC/S 280-2026B-000-0 FUSE 591-03008-200-0 T/P FLT SCR.X8 210-03300-001-6 CH 1/2 OUTPUT 210-03300-240-0 CH 1/2 INPUT 211-01602-550-0 CH 1/2 INPUT/OUTPUT 210-03300-240-0

2、 CH 1/2 INPUT 210-03300-001-6 CH 1/2 OUTPUT 210-02201-390-0 OUT/IN 542-60240-020-0 P/KNOB 210-02201-390-0 OUT/IN 542-60240-020-0 P/KNOB P/KNOB:542-20320-020-0 ACRYLIC:529-20032-000-0 HOUSING:543-20210-010-0 P/SW:210-02101-010-0 LED:100-00150-040-0 260-10000-080-0 VU METER(LOW I/O LEVEL) 260-10000-09

3、0-0 VU METER(LOW I/REDUCTION) 260-10000-100-0 VU METER(HIGH I /O LEVEL) 260-10000-110-0 VU METER(HIGH REDUCTION) 540-20420-020-0 R/KNOB ALL ROT/VR 025-50314-010-0 COLD WARM 025-50314-000-0 CROSS-OVER 210-04402-000-0 HIGH AVERAGE LOW AVERAGE METER MODE 210-04202-040-0 HIGH AVERAGE LOW AVERAGE METER M

4、ODE 210-04402-000-0 100-00410-000-0 CLIP LED 210-04202-040-0 PROCESSOR 022-50340-080-0 INPUT/LOW/HIGH/OUTPUT 023-50340-040-0 INPUT/LOW/HIGH/OUTPUT/ Ch2 COLD WARM 023-50340-030-0 LOW COMP./COMP RATIO /HIGH COMP./COMR RATIO CROSS.OVER 023-50340-040-0 INPUT/LOW/HIGH/ OUTPUT /Ch2 COLD WARM 023-50340-030

5、-0 LOW COMP/COMP RATIO /HIGH COMP/COMR RATIO CROSS.OVER 022-50340-070-0 LOW COMP./COMP RATIO /HIGH COMP./COMR RATIO CROSS.OVER 022-50340-070-0 LOW COMP/COMP RATIO /HIGH COMP/COMR RATIO CROSS.OVER RadioFans.CN 收音机爱 好者资料库 Page 4Page 4 PHONIC CORPORATION SYSTEM BLOCK DIAGRAM SYSTEM BLOCK DIAGRAM T 8200

6、 SERVICE MANUAL INPUT MATERMODE LOW REDUCTION INPUT INPUT HIGHCOMP. COMP.RATIO -10dB/+4dBTHRESHOLD+/-12dB +/-12dB LOW PREQUENCY OUTPUT BALANCED INPUT STAGE LOW 1:1-20 +/-12dB LOW PREQUENCY LEVEL LOW PREQUENCY COMP.RATIO LOW PREQUENCY LOWAVERAGE S/F -40-+20 +/-12dB COMP.RATIO LOW PREQUENCY COMP.RATIO

7、 HIGH REDUCTION PROCESSOR BALANCED INPUT STAGE PROCESSOR -12-+12 -12-+12 COMP.RATIO HIGHT LEVEL -40-+20 TUBE LOW PREQUENCY PROCESSOR -10/+4dB LEVEL 1:1-20 TUBE OUTPUT VARIABLE X-OVER STAGE PROCESSOR TIMBRE OUTPUT PROCESSOR +/-12dB HIGHAVERAGE S/F OUTPUT BYPASS -40-+20 -12-+12 CROSS-OVER INPUT TIMBRE

8、 VARIABLE X-OVER STAGE RELAY LOW LEVEL CROSS-OVER LEVEL TUBE -40-+20 THRESHOLD LOWCOMP. HIGH TIMBRE THRESHOLD PROCESSOR +/-12dB-10dB/+4dB OUTPUT LOWAVERAGE S/F BY/IN PROCESSOR -40-+20 RELAY HIGH THRESHOLD HIGH I/O LEVER HIGH I/O LEVER THRESHOLD cold-warm MATERMODE VARIABLE X-OVER STAGE LEVEL1:1-20 +

9、/-12dB CLIP 1:1-20 +/-12dB BYPASS PROCESSOR LOWCOMP. LOW CLIP cold-warm LEVEL 100-12KLEVEL LOW I/O LEVEL HIGHAVERAGE S/F cold-warm 100-12K HIGHAVERAGE S/F BALANCED INPUT STAGE CROSS-OVER HIGHCOMP. LOW REDUCTION -10/+4dB HIGHCOMP. LOW I/O LEVEL THRESHOLD ST/LINK -40-+20 HIGH REDUCTION INPUT HIGH LEVE

10、L100-12K LEVELLEVEL BALANCED INPUT STAGE LEVEL 1:1-20 LOW LEVEL COMP.RATIO LOWCOMP. BY/IN +/-12dB 1:1-20 LEVEL LOWAVERAGE S/F RadioFans.CN 收音机爱 好者资料库 Page 5PHONIC CORPORATION CH_1 INPUT SCH CH_1 INPUT SCH T 8200 SERVICE MANUAL Page 6PHONIC CORPORATION CH_1 PROCESSOR SCH CH_1 PROCESSOR SCH T 8200 SER

11、VICE MANUAL Page 7PHONIC CORPORATION CH1-2 12dB/Oct FILTER SCH CH1-2 12dB/Oct FILTER SCH T 8200 SERVICE MANUAL Page 8PHONIC CORPORATION CH1-2 GAIN REDUCTION VUMETER SCH CH1-2 GAIN REDUCTION VUMETER SCH T 8200 SERVICE MANUAL Page 9PHONIC CORPORATION CH1-2 INPUT & CONNECTOR SCH CH1-2 INPUT & CONNECTOR

12、 SCH T 8200 SERVICE MANUAL Page 10PHONIC CORPORATION CH1-2 INPUT & VALVE STAGE SCH CH1-2 INPUT & VALVE STAGE SCH T 8200 SERVICE MANUAL COLDCOLD CH2 VALVE_OUT_2CH2 VALVE_OUT_2 R7 8.2K R7 8.2K 1 12 2 5 5 4 4 6 6 + + C6 22uF/25V C6 22uF/25V 1 12 2 C136C136 100n100n 1 12 2 WARMWARM R6 10K R6 10K 1 12 2

13、C159 100P C159 100P 1 12 2 -V1-V1 -V1-V1 +V1+V1 CH2RLYBUS_B/LCH2RLYBUS_B/L R24 10K R24 10K 1 12 2 VR5AVR5A 1 13 3 2 27 7 + + C4C4 22uF/25V22uF/25V 1 12 2 R20 8.2K R20 8.2K 1 12 2 + - + - U2B NJM2068 U2B NJM2068 5 5 6 6 7 7 8 84 4 WARMWARM WARMWARM CH1 INPUTCH1 INPUT R1 8.2K R1 8.2K 1 12 2 GND1GND1 R

14、2 10K R2 10K 1 12 2 CH1 VALVE_OUTCH1 VALVE_OUT R8 3.3K R8 3.3K 1 12 2 CH2RLYBUS_BCH2RLYBUS_B C160 100P C160 100P 1 12 2 COLDCOLD +V2+V2 C5 100P C5 100P 1 12 2 + - + - U48AU48A NJM2068NJM2068 3 3 2 2 1 1 8 84 4 +V1 +V1 +V1 +V1 GND2GND2 C134 100n C134 100n 1 12 2 R10 1K R10 1K 1 12 2 GND2GND2 GND1GND1

15、 WARMWARM CH2RLYBUS_B/LLCH2RLYBUS_B/LL GND2GND2 GND1GND1 WARMWARM C137 100n C137 100n 1 12 2 -V2-V2 VR1AVR1A 1 13 3 2 2 CH2VALVE_OUTCH2VALVE_OUT -V2-V2R14 10K R14 10K 1 12 2 COLDCOLD R3 1K R3 1K 1 12 2 ST-LINKST-LINK -V1-V1 VR3BVR3B 50KB(C.C)*450KB(C.C)*4 4 46 6 5 58 8 C132 100n C132 100n 1 12 2 VR3

16、A,3B,3CA,3DB VR3A,3B,3CA,3DB CH2VALVE_OUT_2CH2VALVE_OUT_2 CH2 TUBE TIMBERCH2 TUBE TIMBER CH2RLYBUS_ACH2RLYBUS_A GND1GND1 + - + - U47A NJM2068 U47A NJM2068 3 3 2 2 1 1 8 84 4 GND1GND1 + - + - U1A NJM2068 U1A NJM2068 3 3 2 2 1 1 8 84 4 + - + - U47B NJM2068 U47B NJM2068 5 5 6 6 7 7 8 84 4 R23 3.3K R23

17、3.3K 1 12 2 VR3CAVR3CA 1 13 3 2 27 7 CH2 VALVE_OUT_1CH2 VALVE_OUT_1 CH2 VALVE_SUM STAGE/LCH2 VALVE_SUM STAGE/L COLDCOLD +V2+V2 VR3DBVR3DB 4 46 6 5 58 8 GND2GND2 R18 10K R18 10K 1 12 2 VR3AVR3A 1 13 3 2 27 7 GND1GND1 CH2 INPUT LEVELCH2 INPUT LEVEL -V2-V2 CH1 INPUT LEVELCH1 INPUT LEVEL -V1-V1 CH2 VALV

18、E_SUM STAGECH2 VALVE_SUM STAGE -V2-V2 GND1GND1 R19 1K R19 1K 1 12 2 VR4 50KB(C.C) VR4 50KB(C.C) 1 13 3 2 2 GND2GND2 R12 10K R12 10K 1 12 2 5 5 4 4 6 6 C133 100n C133 100n 1 12 2 C165 100n C165 100n 1 12 2 CH1 TUBE TIMBERCH1 TUBE TIMBER R21 10K R21 10K 1 12 2 C135 100n C135 100n 1 12 2 COLD -V1 COLD

19、-V1 R17 10K R17 10K 1 12 2 R15 8.2K R15 8.2K 1 12 2 R9 10K R9 10K 1 12 2 COLDCOLD +V1+V1 + - + - U1B NJM2068 U1B NJM2068 5 5 6 6 7 7 8 84 4 GND1GND1 C164 100n C164 100n 1 12 2 GND1GND1 + - + - U2AU2A NJM2068NJM2068 3 3 2 2 1 1 8 84 4 + - + - U48B NJM2068 U48B NJM2068 5 5 6 6 7 7 8 84 4 WARMWARM R13

20、3.3K R13 3.3K 1 12 2 CH2VALVE_OUT_1CH2VALVE_OUT_1 GND1GND1 -V2-V2 C158 100P C158 100P 1 12 2 +V2+V2 GND2GND2 R4R4 8.2K8.2K 1 12 2 GND1GND1 R5 10K R5 10K 1 12 2 GND2GND2 GND2GND2 VR1BVR1B 50KB(C.C)*250KB(C.C)*2 4 46 6 5 5 -V1-V1 C3 100P C3 100P 1 12 2 CH2RLYBUS_B/SCH2RLYBUS_B/S GND1GND1 2 2 1 1 3 3 S

21、W1ASW1A SWITCH *4SWITCH *4 2 2 1 1 3 3 +V1+V1 R16R16 8.2K8.2K 1 12 2 NORMALNORMAL GND2GND2 R22 10K R22 10K 1 12 2 LINKLINK CH1 INPUT LEVELCH1 INPUT LEVEL +V1 CH2INPUT +V1 CH2INPUT C1 100P C1 100P 1 12 2 R11 10K R11 10K 1 12 2 +V2+V2-V2-V2 +V2+V2 + + C2 22uF/25V C2 22uF/25V 1 12 2 GND1GND1 GND2GND2 C

22、H1 VALVE_SUM STAGECH1 VALVE_SUM STAGE VR5BVR5B 50KB(C.C)*250KB(C.C)*2 4 46 6 5 58 8 +V2+V2 Page 11PHONIC CORPORATION CH1-2 OUTPUT SCH CH1-2 OUTPUT SCH T 8200 SERVICE MANUAL Page 12PHONIC CORPORATION CH1-2 OUTPUT_2 SCH CH1-2 OUTPUT_2 SCH T 8200 SERVICE MANUAL Page 13PHONIC CORPORATION CH1-2 VCA PROCE

23、SSOR SCH CH1-2 VCA PROCESSOR SCH T 8200 SERVICE MANUAL CH2 VCA CNTR LOW/LCH2 VCA CNTR LOW/L + - + - U33BU33B NJM2068NJM2068 5 5 6 6 7 7 8 84 4 R189 22K R189 22K 1 12 2 GND1GND1 R170 10K R170 10K 1 12 2 U41 THAT 2180A U41 THAT 2180A 4 4 7 7 1 1 3 3 8 8 5 5 6 6 2 2 + + C76 10uF/63V C76 10uF/63V 1 12 2

24、 + + C88 10uF/63V C88 10uF/63V 1 12 2 -V2 -V1 -V2 -V1 GND2GND2 R163 22K R163 22K 1 12 2 R177 5.6K R177 5.6K 1 12 2 +V1+V1 GND1GND1 GND1GND1 C82 100n C82 100n 1 12 2 +V1 -V1 +V1 -V1 CH2 VCA CNTR LOWCH2 VCA CNTR LOW GND1GND1 R178 22K R178 22K 1 12 2 R164 22K R164 22K 1 12 2 -V2-V2 R180 10K R180 10K 1

25、12 2 C94 100n C94 100n 1 12 2 R169 22K R169 22K 1 12 2 R183 22K R183 22K 1 12 2 GND1GND1 GND1GND1 R174 22K R174 22K 1 12 2 +V1+V1 -V1-V1 CH2 SUM STAGE/LCH2 SUM STAGE/L R187 5.6K R187 5.6K 1 12 2 GND1GND1 GND2GND2 +V1+V1 +V2+V2 -V1-V1 R190 10K R190 10K 1 12 2 + + C80 10uF/63V C80 10uF/63V 1 12 2 +V1+

26、V1 +V1+V1 + - + - U33A NJM2068 U33A NJM2068 3 3 2 2 1 1 8 84 4 + - + - U30B NJM2068 U30B NJM2068 5 5 6 6 7 7 8 84 4 + + C96 10uF/63V C96 10uF/63V 1 12 2 GND1GND1 GND2GND2 C85 100n C85 100n 1 12 2 + - + - U31BU31B NJM2068NJM2068 5 5 6 6 7 7 8 84 4 R191 10K R191 10K 1 12 2 CH1_DRIVER LOWCH1_DRIVER LOW

27、 R171 10K R171 10K 1 12 2 +V1+V1 GND1GND1 +V2+V2 GND1GND1 + - + - U30A NJM2068 U30A NJM2068 3 3 2 2 1 1 8 84 4 GND2GND2 GND1GND1 R179 22K R179 22K 1 12 2 +V1+V1 R192 5.6K R192 5.6K 1 12 2 C8147pFC8147pF1 12 2 -V2-V2 R166 10K R166 10K 1 12 2 + - + - U32A NJM2068 U32A NJM2068 3 3 2 2 1 1 8 84 4 CH2 VC

28、A CNTR HIGH/LCH2 VCA CNTR HIGH/L + - + - U28A NJM2068 U28A NJM2068 3 3 2 2 1 1 8 84 4 + - + - U31AU31A NJM2068NJM2068 3 3 2 2 1 1 8 84 4 C7947pFC7947pF1 12 2 +V2+V2 -V1-V1 CH2_DRIVER HIGHCH2_DRIVER HIGH U45 THAT 2180A U45 THAT 2180A 4 4 7 7 1 1 3 3 8 8 5 5 6 6 2 2 U44U44 THAT 2180ATHAT 2180A 4 4 7 7

29、 1 1 3 3 8 8 5 5 6 6 2 2 CH2_DRIVER LOWCH2_DRIVER LOW GND1GND1 GND2GND2 +V2+V2 -V1-V1 R185 10K R185 10K 1 12 2 GND1GND1 + - + - U28B NJM2068 U28B NJM2068 5 5 6 6 7 7 8 84 4 GND1GND1 GND1GND1 C77 100n C77 100n 1 12 2 -V1-V1 GND2 -V1 GND2 -V1 -V2-V2 + + C92 10uF/63V C92 10uF/63V 1 12 2 -V2-V2 GND1GND1

30、 CH1 SUM STAGECH1 SUM STAGE C78 100n C78 100n 1 12 2 +V1+V1 CH2 VCA CNTR HIGHCH2 VCA CNTR HIGH +V1+V1 C74 100n C74 100n 1 12 2 C86 100n C86 100n 1 12 2 +V1+V1 CH1 VCA CNTR HIGHCH1 VCA CNTR HIGH U46U46 THAT 2180ATHAT 2180A 4 4 7 7 1 1 3 3 8 8 5 5 6 6 2 2 +V2+V2 R182 5.6K R182 5.6K 1 12 2 R175 10K R17

31、5 10K 1 12 2 -V1-V1 C91 100n C91 100n 1 12 2 CH2_DRIVER LOW/LCH2_DRIVER LOW/L R176 10K R176 10K 1 12 2 C75 100n C75 100n 1 12 2 U42 THAT 2180A U42 THAT 2180A 4 4 7 7 1 1 3 3 8 8 5 5 6 6 2 2 C83 100n C83 100n 1 12 2 -V1-V1 GND2GND2 U43 THAT 2180A U43 THAT 2180A 4 4 7 7 1 1 3 3 8 8 5 5 6 6 2 2 -V1-V1

32、GND1GND1 CH2_DRIVER HIGH/LCH2_DRIVER HIGH/L C162 100P C162 100P 1 12 2 C90 100n C90 100n 1 12 2 R168 22K R168 22K 1 12 2 +V1+V1 R165 10K R165 10K 1 12 2 +V1+V1 C93 100n C93 100n 1 12 2 -V1-V1 GND2GND2 C163 100P C163 100P 1 12 2 + + C84 10uF/63V C84 10uF/63V 1 12 2 GND2GND2 -V2-V2 -V2-V2 CH1 VCA CNTR

33、 LOWCH1 VCA CNTR LOW CH1_DRIVER HIGHCH1_DRIVER HIGH R188 22K R188 22K 1 12 2 C9547pFC9547pF1 12 2 -V1-V1 GND1GND1 + - + - U29BU29B NJM2068NJM2068 5 5 6 6 7 7 8 84 4 R172 5.6K R172 5.6K 1 12 2 CH2 SUM STAGECH2 SUM STAGE -V2-V2 +V1+V1 C7347pFC7347pF1 12 2 GND1GND1 R167 5.6K R167 5.6K 1 12 2 R184 22K R

34、184 22K 1 12 2 -V1-V1 -V1-V1 + - + - U32B NJM2068 U32B NJM2068 5 5 6 6 7 7 8 84 +V1 4 +V1 +V1+V1 +V2+V2 GND2GND2 +V1+V1 + - + - U29A NJM2068 U29A NJM2068 3 3 2 2 1 1 8 84 4 C8747pFC8747pF1 12 2 C8947pFC8947pF1 12 2 R186 10K R186 10K 1 12 2 C161 100P C161 100P 1 12 2+V1+V1 R173 22K R173 22K 1 12 2 +V

35、2+V2 GND1GND1 R181 10K R181 10K 1 12 2 +V2+V2 Page 14PHONIC CORPORATION CH_2 INPUT VUMETER SCH CH_2 INPUT VUMETER SCH T 8200 SERVICE MANUAL Page 15PHONIC CORPORATION CH_2 PROCESSOR SCH CH_2 PROCESSOR SCH T 8200 SERVICE MANUAL GND2GND2 GND1GND1 GND2GND2 CH2 VCA CNTR LOWCH2 VCA CNTR LOW R120R120 5.6K5

36、.6K1 12 2 C59C59 100n100n 1 12 2 SW12BSW12B 5 5 4 4 6 6 +V1+V1 (-12dB)(-12dB) VR17 50KB VR17 50KB 1 13 3 2 2 4 4 5 5 + - + - U23BU23B NJM2068NJM2068 5 5 6 6 7 7 8 84 4 +V2+V2 + + C57C57 10uF/63V10uF/63V 1 12 2 GND2GND2 GND1GND1 R135 1KR135 1K 1 12 2 GND1GND1 -V1-V1 D45 LL4148 D45 LL4148 1 12 2 +V2+V

37、2 CH1 LOW AVERAGECH1 LOW AVERAGE GND2GND2 GND2GND2 C70C70 100n100n 1 12 2 (-12dB)(-12dB) -V2-V2 GND2GND2 CH2_DRIVER HIGH/LCH2_DRIVER HIGH/L C131 100n C131 100n 1 12 2 R155R155 10K10K 1 12 2 VR15VR15 50KB(C.C)50KB(C.C) 1 13 3 2 2 4 4 5 5 R106R106 330K 1%330K 1% 1 12 2 R125R125 330K 1%330K 1% 1 12 2 +

38、 - + - U24BU24B NJM2068NJM2068 5 5 6 6 7 7 8 84 4 GND2GND2 D60D60 LL4148LL4148 1 12 2 -V2-V2 -V2-V2 GND1GND1 CH2 VCA CNTR HIGH/LCH2 VCA CNTR HIGH/L + - + - U24AU24A NJM2068NJM2068 3 3 2 2 1 1 8 84 4 VR11BVR11B 4 46 6 5 58 8 -V2-V2 VR13BVR13B 4 46 6 5 58 8 R150R150 33K33K 1 12 2 SW10ASW10A 2 2 1 1 3

39、3 D68D68 LL4148LL4148 1 12 2 R109 2.7K R109 2.7K 1 12 2 CH2 HIGH AVERAGECH2 HIGH AVERAGE +V1+V1 GND2GND2 + - + - U26B NJM2068 U26B NJM2068 5 5 6 6 7 7 8 84 4 VR16VR16 50KB50KB 1 13 3 2 2 4 4 5 5 D69 LL4148 D69 LL4148 1 12 2 (+12dB)(+12dB) -V1-V1 +V1+V1 GND2GND2 -V2-V2 R129 10K R129 10K 1 12 2 -V2 -V

40、2 -V2 -V2 GND2GND2 GND2GND2 R136 10K R136 10K 1 12 2 D70 LL4148 D70 LL4148 1 12 2 + - + - U27AU27A NJM2068NJM2068 3 3 2 2 1 1 8 84 4 GND2GND2 -V2-V2 R118R118 1K1K 1 12 2 GND1GND1 +V1+V1 R110 10K R110 10K 1 12 2 +V2+V2 (+20dB)(+20dB) GND2GND2 GND2GND2 + - + - U19BU19B NJM2068NJM2068 5 5 6 6 7 7 8 84

41、4 GND2GND2 R131R131 33K33K 1 12 2 -V1-V1 -V1-V1+V1+V1 D46 LL4148 D46 LL4148 1 12 2 D55D55 LL4148LL4148 1 12 2 -17V CH2 -17V CH2 C125 100n C125 100n 1 12 2 R147 2.7K R147 2.7K 1 12 2 +V2+V2 +V2+V2 D49 LL4148 D49 LL4148 1 12 2 R139 5.6K R139 5.6K1 12 2 +V2+V2 +V2+V2 R143R143 680K680K 1 12 2 C126 100n

42、C126 100n 1 12 2 +V2+V2 +V1+V1 GND1GND1 -V2-V2 -V2-V2 CH2 LOW AVERAGECH2 LOW AVERAGE -V2-V2 R138R138 2.7K2.7K 1 12 2 R130 82K 1% R130 82K 1% 1 12 2 R154R154 1K1K 1 12 2 C54C54 100n100n 1 12 2 D58D58 LL4148LL4148 1 12 2 C121 100n C121 100n 1 12 2 R122 270K R122 270K 1 12 2 + +C58C58 1uF/100V1uF/100V

43、1 12 2 R152R152 5.6K5.6K 1 12 2 + - + - U22A NJM2068 U22A NJM2068 3 3 2 2 1 1 8 84 4 GND2GND2 R126 10K R126 10K 1 12 2 R156 1K R156 1K 1 12 2 R111R111 82K 1%82K 1% 1 12 2 (+20dB) -V2 (+20dB) -V2 GND2GND2 + - + - U21A NJM2068 U21A NJM2068 3 3 2 2 1 1 8 84 4 C129 100n C129 100n 1 12 2 -17V-17V GND1GND

44、1 D59 LL4148 D59 LL4148 1 12 2 SW10BSW10B 5 5 4 4 6 6 R117R117 10K10K 1 12 2 GND2GND2 -V1-V1 CH2 HIGH GAIN REDUCTIONCH2 HIGH GAIN REDUCTION C53 100n C53 100n 1 12 2 C63 100n C63 100n1 12 2 R162 680K R162 680K 1 12 2 + - + - U21B NJM2068 U21B NJM2068 5 5 6 6 7 7 8 84 4 GND2GND2 C56 100n C56 100n1 12

45、2 D66D66 LL4148LL4148 1 12 2 -V2-V2 GND2GND2 R158R158 5.6K5.6K 1 12 2 -V1-V1 +V1+V1 CH2_DRIVER HIGHCH2_DRIVER HIGH +V2+V2 GND1GND1 D44 LL4148 D44 LL4148 1 12 2 GND2GND2 -V2-V2 +V2+V2 GND1GND1 VR14 50KB VR14 50KB 1 13 3 2 2 4 4 5 5 CH2 HIGH LEVEL CH2 HIGH LEVEL + + C64C64 10uF/63V10uF/63V 1 12 2 -V1-

46、V1 GND2GND2 SW9A,9B,10A,10B SW9A,9B,10A,10B R148 10K R148 10K 1 12 2 GND1GND1 R132 22K R132 22K 1 12 2 +V2+V2 GND1GND1 (+20dB)(+20dB) C67 100n C67 100n 1 12 2 + - + - U27BU27B NJM2068NJM2068 5 5 6 6 7 7 8 84 4 R161 15K R161 15K 1 12 2 R134 10K R134 10K 1 12 2 D53D53 LL4148LL4148 1 12 2 R124 680K R12

47、4 680K 1 12 2 CH1 HIGH COMPCH1 HIGH COMP THRESHOLDTHRESHOLD CH2 HIGH GAIN REDUCTION/LCH2 HIGH GAIN REDUCTION/L R112R112 33K33K 1 12 2 C127 100n C127 100n 1 12 2 C61 100n C61 100n 1 12 2 + +C72C72 1uF/100V1uF/100V 1 12 2 R146 330K 1% R146 330K 1% 1 12 2 GND1GND1 GND2GND2 CH2 VCA CNTR HIGHCH2 VCA CNTR

48、 HIGH R140R140 10K10K 1 12 2 C124C124 100n100n 1 12 2 (+12dB) CH2 LOW LEVEL (+12dB) CH2 LOW LEVEL -V1-V1 + +C65C65 1uF/100V1uF/100V 1 12 2 R108R108 330K 1%330K 1% 1 12 2 SW11ASW11A SWITCH *2SWITCH *2 2 2 1 1 3 3 + + C69C69 10uF/63V10uF/63V 1 12 2 (-40dB)(-40dB) +V1+V1 R121 10K R121 10K 1 12 2 + - +

49、- U20AU20A NJM2068NJM2068 3 3 2 2 1 1 8 84 4 D67 LL4148 D67 LL4148 1 12 2 R141 270K R141 270K 1 12 2 VR19VR19 50KB(C.C)50KB(C.C) 1 13 3 2 2 4 4 5 5 (-40dB) +V2 (-40dB) +V2 D52 LL4148 D52 LL4148 1 12 2 R123 15K R123 15K 1 12 2 -V2-V2 +V1+V1 CH2_DRIVER LOWCH2_DRIVER LOW R137 1K R137 1K 1 12 2 GND1GND1 C66C66 100n100n 1 12 2 R151 22K R151 22K 1 12 2 D57 LL4148 D57 LL4148 1 12 2 COMP.RATIOCOMP.RATIO + - + - U25AU25A NJM2068NJM2068 3 3 2 2 1 1 8 84 4 C122 100n C122 100n 1 12 2 D64 LL4148 D64 LL4148 1 12 2 (+12dB) +V2 (+12dB) +V2 +V2+V2 GND2GND2 R145R145 10K10K 1 12 2 C52 100n C52 1