Carvin_sx300r_2 电路图 维修原理图.pdf

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1、A4.A A5.B A5.A R136 R126 R118R124R121 C128 R146 C129 D107 !- + !- + !- + + + D108 R132 R135 C114 + R115 R133 R125 R137 C120 + C121 + 1N914 1N914 A4.B R150 R149 D104 D105 !- + C113 + 1N914 1N914 C115 + D101 C117 + R142 Q104 R123 D102 C116 + 47k R148 R127 R134 R145 R119 A7.B !- + D1 R120 D3 360K C111

2、+ C119 + D5 R122 R130 R131 R129 R139 R140 R141 C124 + C123 + C125 + C127 + R144 C112 + R114 R147 C126 + 500Hz S101.B S101.A R128 S102.A S102.B R116 C110 + R117 Q29 A7.A A8.B A8.A R230R226R218R224R221 C227 R246 C228 D207 !- + !- + !- + + + D208 R233 R225 C214 + 39pF R215 R234 R235 R237 C221 + C220 +

3、0.0033 0.1 22F 1N914 1N914 0.01 A6.A R250 R249 D204 D205 !- + C213 + 82PF 1N914 1N914 C215 + 22F D203 1N914 C217 + 0.1F R242 Q201 365k R223 470K D206 1N914 1k 1k 1k C216 + 22F 1k 47k 68k360k 1k2.2k 47k R248 1M R236 R238 R245 10k R219 47K A9.A !- + C212 + 0.001F D200 R220 220 D202 10K 150K C211 + 1F

4、C219 + 82PF D201 R222 1K22K R231 2.2k R232 470 R229 1k R239 R240 R241 C223 + n/u C222 + 0.047F C224 + 0.1F 330 220K 47K C226 + 0.01F R244 4.7K C209 + 0.1F R214 1MR247 10k C225 + 22F 22K 33K 500Hz 47K S201.B S201.A R227 220k R228 1M C218 + 180PF S202.A S202.B R216 C210 + 0.1R217 1M Q200 47K N:408 MAI

5、N PRE FX MAIN PRE FX #300#301#302 GND A M CH1 FET + A6.B !- + CH1 FET - CH2 FET - CH2 FET+ A9.B C309 R320R319 !- + R318R316 C310 + R313C312 + +15VDC C408 -15VDC C403 C404 C470 MASTER H8B.A H8B.C H8B.B H8B.D +15VDC -15VDC 35V 35V R403 R402 CH3 FET - C308 R315 + Q300 R314 -15VDC +15VDC C406 C407 R317

6、R471 R470 C311 + R322 12340 World Trade Drive San Diego, CA 92128 (858) 487-1600 FAX 487-6629 REVISED BY: APPROVED: DRAWN BY:DATE: DATE: ASSY. DATE: ARVIN REV: REV: NO: PCB NO: C A.J.Ashley PRE-AMP 500Hz C471 R472 FX RET DSP SEND(OUT) +15VDC N:408 MAIN PRE FX S300.A S300.B A10.B !- + C1 + R1 C2 + R1

7、2 0.047F 39pF 1K R4 R3 R10 R9 R8 R6 C4 C9 5.6K 10K 220K 1.5K 10K C5 +15VDC QF1 R13 R11 10K QF2 C7 + C8 + n/u C6 R5 R2 R7 1M +15VDC C109 + C122 + R138 0.1F 1M 330 47k 1M 0.1F 1F 0.001F 1k 220 1k 360k 39pF 47k 470k 1k 82pF 22F 22F 1K 2.2k 470 1k0.1F 22k 68k 1k 82pF 1k2.2k 10k 0.01F 0.0068F 0 47k 47k 1

8、50k 0.0033F 220K 0.047F 33k 22k 0.1Fn/u 22F 0.01F 4.7k 22k 10k10k 22F 47k 1M 0.1F 6.8k 47k 0.1F 1M 1M 470k 1F 10 470k n/u n/u n/u 10 10 22F 22F 15k 39pF 22k 33K 120pF 22F 220 0.0033F 1k2.2k 47k47k 0.01F 10k 0.0033F R321 22k J1 INPUT A10.A !- + +5V DSP 0.068F 5457 5457 R143 10k R243 10K C118 +1F H1A.

9、A H1A.B H1A.C H1A.D H2A.A H2A.B H2A.C H2A.D H3A.A H3A.B H3A.C H3A.D MAIN PRE FX CH MIDDLE H4A.A H4A.C H4A.B H4A.D H6B.A H6B.C H6B.B H6B.D 1/2 H1B DSP RET(IN) FX RET D GND TO FRONT MAIN OUT #303 #304 #305 #306 STANDOFFS C3 + H101A.A H101A.B 10DEC02 B PAGE 2 of 5 + + 30- 03301 80- 03301 A SX 300R 收音机爱好者资料库 Ra d i o Fa n s .CN