Carvin-DCM3800L_J-pwr-sch 电路图 维修手册.pdf

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1、2. ALL CAPACITORS IN MICORFARADS, EXCEPT AS NOTED. 3. ALL DIODES ARE TYPE 1N4003, EXCEPT AS NOTED. NOTES: UNLESS OTHERWISE SPECIFIED. 4. ADDED AS SECONDARY OPERATION. 1. ALL RESISTORS IN OHMS GEORGE DREYER PARALLEL IN GND LIFT MJD340 MJD350 MJD340 MJD350 EARTH GND +15V PRE +15V PRE -15V PRE -15V PRE

2、 -15V PRE +15V PRE -15V PRE +15V PRE -15V PRE +15V PRE -15V PRE +15V PRE -15VDC +15VDC H11B.F H11B.G H11B.C H11B.A H11B.I H11B.J H11B.D H11B.E H11B.H H11B.B BRIDGE 22 1W1% 22 1W1% 340 350 340 350 Clip 2 Clip 1 5401 5401 120pF 120pF 82pF .01 82pF 1.5H 1.5H .047F 250VAC .1F 120pF POWER H12.1 H12.B .1F

3、 .1F R118 R86 R87 R120 S4.B S3.A S1.B S4.A S3.B S1.A 39pF 330pF 39pF 330pF R130 R131 R133 C175 C177 C176 R138 R176 R178 C181 D311 R134 R139 R140 R141 D107 R142 R143 R144 R145 R230 R231 C275 R237 C277 C276 R238 R278 R279 C281 R330 Q203 Q202 R234 C221 Q205 Q204 R239 R240 R241 D207 R242 R243 R244 R245

4、R420 R419 Q103 Q102 L100 Q105 Q104 D103 L200 D203 -24V R179 R177 R277 R276 D206 -24V K100 K200 -24V R314 R315 R322 R320 D310 D312 C317 R317 R318 R323 R321 R311 R312 R325 R326 R324 C310 R331 Q230 Q130 C313 R327 R329 Q303 R92 R90 R91 R93 R121 R122 C57 C59 C77 C76 R119 .01 .01 Red C58 ch2sig D4 D6 D5 V

5、+ PRE V- PRE V+ PRE V- PRE 22 ch1sig + + + 2N5400 2.2K 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 15K 10K 10K15K 10K 15K A14.A 2 3 +1 A25.A 2 3 +1 4.7K 2.2K 2.2K 27K 27K A17.A 2 3 + 1 8

6、 4 A17.B 6 5 + 7 4.7K 4.7K 4.7K R137 470 4.7K 470 4.7K 1N914 D106 1N914 1K 1K 1K 1K 33K 6.8K 100K 1N914 A20.A 2 3 + 1 8 4 A21.B 6 5 + 7 8 4 2114 A18.A 2 3 + 1 8 4 A18.B 6 5+ 7 2114 A20.B 6 5 +7 A21.A 2 3 +1 100K 10K 5.6K 470K 1N914 4.7K 4.7K 4.7K 68K 68K 470 1N914 1N914 4.7K 1K 1K 1K 4.7K 470 1K 6.8

7、K 33K 100K 68K 1.5K 1.8K 2.2K 47K 100K 1K 4.7K 10K 22K 1.8K R405 100 .001F C403 R319 33K R233 2.2K 47K 27K 100K CHANNEL 2 J2 CHANNEL 1 J1 EARTH GND MJD340 Q301 CURLIM CURLIM RELAY+ RELAY+ CURLIM C318 22 D17 F1 E2 500 ms delay INPUT GND A22.B 6 7 +1 A22.A 4 5 +2 A22.D 8 9 +14 A22.C 10 11 +13 R98 100K

8、 R104 150 22 1W1% 22 1W1% R182 R136 EARTH GND + D10 1N914 D16 0.047F 100V C221B + Diode SMB SMT1A D108 D109 D208 SMB D209 SMB SMT A14.B 6 5 +7 A25.B 6 5 +7 27pF R10 R96 C67 22K 33K 27pF R99 R115 C72 22K 33K C186 22 + R289 150K R189 150k C82 22 + R209 3.3K +15V PRE +15V PRE 555 Q302 +15V PRE +15V PRE

9、 +15V PRE 22F C103 22F C104 22F C105 J100 J200 21 3 21 3 120pF R88 R89 C54 10K 15K LIMITER S2.B S2.A +15V PRE -15V PRE 22 C7 + 22 C8 + R24 100 R25 100 R14 protect D11 1K H1.A H1.B -15VDC +15VDC OUTPUT2 OUTPUT1 THERMAL DIO R211 270 R210 68 D25D26 D27D28 1N914x4 R232 150K smt 1/4w R229 150K smt 1/4w O

10、UTPUT2 OUTPUT1 22uF C12 + 22uF C106 + Q14 2N5400 5550 Q15 -15V PRE R59 3.3K R226 47 D29 1N914 R227 220K R228 220K THERMAL DIODE DC protection short circuit protection thermal protection R246150 R216 150 R217150 R249150 R219 150 R220150 R146150 R222 150 R223150 R149 150 R224150 R225150 C10K AMP2 P1 c

11、w C10K AMP1 P2 cw #1688 47k .1F C10 R16 470K smt 1/4w R17 220K Q1 + BRIDGE D18 BLUE power Red protect R18 4.7K C14 .047 250VAC R173 10K 5550 Q133 R273 10K 5550 Q233 R274 47K R174 47K 560 C182 .1 C180 560 C184 560 C282 .1 C280 560 C284 30-02050 FLAT PCB DESIGN 80-02050 Q115Q113Q111Q109 MJW21193 Q110

12、Q112Q114Q116 Q215Q213Q211Q209 MJW21193 Q210Q212Q214Q216 PL2N E L H55B.E H55B.A H55B.B H55B.D H55B.G H55B.C H55B.H H55B.F +15VDC PRI -15VDC PRI INPUT SW GND INPUT SW GND R32 4.7K QC1 QC2 R212A 22 1W R212B 22 1W R212C 22 1W R212D 22 1W .047F 250VAC C121 + EARTH GND 0.047F 100V C121B + R112A 22 1W R112

13、B 22 1W R112C 22 1W R112D 22 1W J3 2+ 2- 1+ 1- J4 2+ 2- 1+ 1- J101 12 3 J201 12 3 C800 + C801 + 47K 1W R800 47K 1W R801 2200F 200V 2200F 200V C802 + .01 R806 R810 Q800GATE Q802GATE Q CENTER 10 10 D800 D802 D803 D804 C807 + 220pF C811 + C814 + C812 + C815 + V+ V- +15V -15V R830 12K MOUNTING HOLES HEA

14、TSINK MOUNTING C827 .47 Q807 R840 R839 27K 10K R842 1K R843 100K D819 1000F 35V C813 + C816 + C831 + D821 D822 T2 10 1 2 3 9 8 4 5 7 6 1000F 100V X 4 +/- 15VDC C834 0.1F C835 + 22F R850 1K C836 + 82F R853 10K -24V 1uF 250V AC C8371uF 250V AC C838 4.7nF 250V AC C839 4.7nF 250V AC C840 LINE NEUT Q800G

15、ATE PWRCOM Q802GATE Q CENTER RECT AC PWRCOM R829 5.6K C823 0.001uF R847 47K R817 10 C805 + .47uF 400V D813 R807 10K R808 10K VREF VREF 22F 600V 1A SMT 470 470 R867 R866 4.7 33K D823 D814 D824 D826 C842 C843 C841 + + 0.0033F 400v C810 C830 + 0.047F +15VDC PRI -15VDC PRI +15VDC PRI +15VDC PRI R835 R83

16、4 C826 + 33K1F R836 4.7K AC MAINS VOLTAGE DETECTION R854 33K D815 D817 D818 D820 220K R815 220K R816 R818 C817 + 1F10K R819 10K D825 R820 10K D827 R821 47K R822 22K VREF R823 R824 R825 RECT AC UNDER/OVER VOLTAGE SHUT DOWN OVER CURRENT DETECTION R809 33K R811 4.7K Q806 C818 C821 C820 R827 10K C822 +

17、22F #141 #59 E4 4.7nF 250V AC C824 HEATSINK -15VDC PRI R813 220 PWRCOMPWRCOM PWRCOM PWRCOM PWRCOM PWRCOM PWRCOM PWRCOM PWRCOM PWRCOM PWRCOM OSC OUT SHUTDN ERROR+ ERROR- DISCHG SG3525 COMP SYNC VREF AOUT BOUT VCC GND RT CT VC SS 16 15 14 13 12 11 10 U1 9 1 2 3 4 5 6 7 8 R805 1.8K PWRCOM 250pF 250pF 1

18、5-86025 +/-15VDC BIAS PRI DSP T1 PWRCOM PWRCOM R8021.5K L800L801 0.47F 250V AC C809 3mH3mH L802 ISENSE+ ISENSE- ISENSE- ISENSE+ FSDH0265RN Drain Vstr PWM Vcc GND Vfb Ipk 4 6 32 1 7 8 5 Q803 R837 R831 1.5K PWRCOM 1A 600V PWRCOM N/U NEUT 470K R844 470K R845 EARTH GND Q808 47K 1W R848 BIAS RECT AC R849

19、 470K 470K D828 Q801 OVER TEMP/AUX PROTECTION LOW RAIL HI RAIL SHLD SHLD PRI PRI SEC T3 20 1 PWRCOM C806 + C808 + PWRCOM 0.1 0.1 Q811 Q809 Q812 Q810 R855 R852R826 R851 PWRCOM C819 + 0.47uF N/U N/U 100 100 8A 200V C828 + 22uF 35V 0.1 0.1 EARTH GND C847 + 2200F 200V C848 + 2200F 200V TR1 T C849 + C851

20、 + C850 + C852 + R814 10 1W R803 10 1W R804A 10 R804B10 R804C10 C4 22 + R340 10K 54 Q5 R1115A 2.4 x12 R1115C R1115D R1115E R1115F R1115B R1116A 2.4 x12 R1116C R1116D R1116E R1116F R1116B R1113A 2.4 x12 R1113C R1113D R1113E R1113F R1113B R1114A 2.4 x12 R1114C R1114D R1114E R1114F R1114B R1111A 2.4 x1

21、2 R1111C R1111D R1111E R1111F R1111B R1112A 2.4 x12 R1112C R1112D R1112E R1112F R1112B R1109A 2.4 x12 R1109C R1109D R1109E R1109F R1109B R1110A 2.4 x12 R1110C R1110D R1110E R1110F R1110B R859 10 1W R858 10 1W R2215A 1.68 x6 R2215C R2215D R2215E R2215F R2215B R2216A 1.68 x 6 R2216C R2216D R2216E R221

22、6F R2216B R2213A 2.4 x12 R2213C R2213D R2213E R2213F R2213B R2214A 2.4 x12 R2214C R2214D R2214E R2214F R2214B R2211A 2.4 x12 R2211C R2211D R2211E R2211F R2211B R2212A 2.4 x12 R2212C R2212D R2212E R2212F R2212B R2209A 2.4 x12 R2209C R2209D R2209E R2209F R2209B R2210A 2.4 x12 R2210C R2210D R2210E R221

23、0F R2210B LM13700 BO2BO1 BI1 I-1 BI2 I+2I+1 I-2 BA1 BD1 BA2 BD2 O1 O2 V-V+ 10 11 12 13 14 15 16 U2 1 2 3 4 5 6 7 89 R162 2.2K R161 100R R160 100R R163 15K R262 2.2K R261 100R R260 100R R263 15K R164 10K R264 10K Q131 2N5400 1F C119+ 100K R165 Q231 5401 100K R265 R268 10K 1F C219+ 470 R166 470 R266 C

24、H1 LIM OP OUT CH1 LIM OP INV CH2 LIM OP OUT CH2 LIM OP INV CH1 LIM OP OUT CH1 LIM OP INV CH2 LIM OP OUT CH2 LIM OP INV 5550 Q232 R270 22K R271 10K CH1 CLIP LIM TAP CH2 CLIP LIM TAP CH2 CLIP LIM TAP Q234 5401 -15V PRE +15V PRE +15V PRE -15V PRE -15V PRE +15V PRE +15V PRE +15V PRE 22K R272 -15V PRE 5.

25、6KR267 R168 10K 5550 Q132 R170 22K R171 10K CH1 CLIP LIM TAP Q134 5401 22K R172 5.6K R167 V+ CS LIM AMP CNTRL LIM AMP CNTRL QC4 +15 IN LIM AMP CNTRL +15 IN limiter D20 R4 4.7K INPUT SW GND +15 IN N:5 N:5 #1123 #1128 #1145 #1149 #1163 +5V +5V THERMAL DIODE 100 smt 1/4w R22 SPK1 SPK2 D2 1N914 1F C1 +

26、C3 .01 22F C410 H11A.F H11A.I H11A.J H11A.E H11A.D H11A.G H11A.A H11A.C H11A.H H11A.B H55A.E H55A.A H55A.B H55A.D H55A.G H55A.C H55A.H H55A.F #49998 D12 D13 K1 K3 R29 0 R30 0 R31 22K GEORGE DREYER Z801 9.1V Z805 9.1V LORAIL+ LORAIL- sec 82F C11 + D14D15 R812A 22 1W R812B 22 1W R828A 22 1W R828B 22 1

27、W 1 #174 1 #44 1 #481 1 #482 1 #483 1 #484 1 #544 1 #545 1 #658 1 #667 n/u V2 +15V PRE D21 12V DSP C15 + 0.047 Q12 Q13 CH1 CH2 BRDG FET2 CH2 FET2 CH1 R36 33K BRDG AMP CNTRL2 CH2 BRDG FET2 CH2 FET2 5550 Q16 R37 2.2K R38 10K Q17 5401 R39 10K 22K R40 BRDG AMP CNTRL = +15V then BRDG off 0V then BRDG on

28、R41 22K +15VDC -15VDC R42 3.3K R43 33K TL3842 RT/CT COMP OUT REF VFB GND VCC CS U700 6 4 3 2 8 1 5 7 TL3842 RT/CT COMP OUT REF VFB GND VCC CS U720 6 4 3 2 81 5 7 L700 L720 R723 R703 C705 C725 R704 C704 0.1 C724 0.1 C703 0.1 C723 0.1 3.3K 10K 10K 250p 250p R706 10K R726 10K R700 47 R720 33 Q721 Q701

29、V+ V+ TRACK V- TRACK R727 10K R705 4.7K R724 3.3K R725 4.7K LORAIL- D722 R728 Q7261 2.2K R708 R707 2.2K 10K LORAIL+ D702 R734 10K Q723Q722 Q703Q702 C701 .1u D703 R712 10K V- PRE V- PRE -TRDRCH1 R733 22K Q7262 Q7072 R716 10K R736 43K HF+TRDRCH1 HF-TRDRCH1 R735 33K R711 1K R710 100K V- C733 39p R731 1

30、K C734 250pF R7293.9K V+ TRACK V+ TRACKCH2 V- TRACKCH2 V- TRACK A1.B 6 5 +7 n/u R741 C730 10K C732 39pF C731 39p V- +16V D701 8A 200V D721 8A 200V MJD340 Q2 R2 47K Z1 9.1V Z2 5.1V R19 5101W R20 510 1W R21 47K Z703 5.1V Z704 9.1V R33 5101W 350 Q6 C702 + 22F R114 R112 +3.3VDC R113 220 220 Q1A LM1117 A

31、dj SMT 270 1000F 25V C5 + C6 22uF +3.3VDC R738 10K R718 10K #1191#1192#1193 R250 22 1W R251 22 1W R150 22 1W R151 22 1W #1707#1708 #1709 #1712#1718#1724#1725#1727#19728 #1729#1733 #1734 #1735#1736 #1737#1738 #3074#3075 #3076#3635#3636#3637#3638#3639#3640#3907#3908 #3909#3910 R45 150 R46 150 R47 150

32、R48 150 +TRDRCH1 R64 470K R65 47K -15V R51 2.2K R52 1K R53 10K R60 43K R61 100K C17 39p C16 250pF R54 4.7K n/u R55 C13 10K -TRDRCH1 R63 47K V- TRACK V+ TRACK A3.A 2 3 +1 27pF R67 R66 C18 10K 22K 27pF R69 R68 C19 10K 22K R70 470K R71 15K -15V PRE HF-TRDRCH1 HF+TRDRCH1 CH1 LIM OP OUT CH2 LIM OP OUT -1

33、5V +15V A1.A 2 3 + 1 8 4 -15V PRE +15V PRE A3.B 6 5 + 7 8 4 C707 + LORAIL+ FAN7371 GND VDD N/C N/CVS VB INHO U702 6 4 3 2 81 5 7 EARTH GND +15V C24 + 22F C727 + .1u 250V C29 .1u +TRDRCH1 D801 Q800 Q802 D805 D808D807 D806 16A 400V D809 D811D812 D810 16A 400V C30 22 + Q107 MJW21193 Q108 MJW21193 Q208

34、Q207 31 Q7 R34 680 R49 220 500 P105 cw 31 Q8 R50 680 R56 220 500 P205 cw Q804 Q805 TL3842 RT/CT COMP OUT REF VFB GND VCC CS U3 6 4 3 2 81 5 7 TL3842 RT/CT COMP OUT REF VFB GND VCC CS U4 6 4 3 2 8 1 5 7 D740 D760 L740 L760 R763 R743 C745 C765 R744 C744 0.1 C764 0.1 C743 0.1 C763 0.1 3.3K 10K 10K 250p

35、 250p R746 10K R766 10K R7409 47 R760 33 Q761 Q741 V+ V+ TRACKCH2 V- TRACKCH2 R767 10K R745 4.7K R764 3.3K R765 4.7K LORAIL- D762 R768 Q7661 2.2K R748 R747 2.2K 10K LORAIL+ D742 R774 10K Q763Q762 Q743Q742 C741 .1u D743 R752 10K -TRDRCH2 R773 22K Q7662 Q7472 HF+TRDRCH2 HF-TRDRCH2 R775 33K 3 2 1 D S G

36、 Q740 3 2 1 D S G Q760 V- V- +16V D741 8A 200V D761 8A 200V R7421 47K Z743 5.1V Z744 9.1V R7433 5101W 350 Q29 C742 + 22F R778 10K R758 10K R7445 150 R7446 150 R7647 150 R7648 150 R7652 1K C747 + LORAIL+ FAN7371 GND VDD N/C N/CVS VB INHO U5 6 4 3 2 81 5 7 EARTH GND +15V C7424 + 22F C767 + .1u 250V C7

37、429 .1u +TRDRCH2 D720 3 2 1 D S G Q720 3 2 1 D S G Q700 R127 1K R128 1K C20 39pF C23 39p R129 470K R132 15K -15V PRE HF-TRDRCH2 HF+TRDRCH2 R964 470K R965 47K -15V -TRDRCH2 R963 47K +TRDRCH2 R951 2.2K C25 + 22F D700 C762 + 1F C722 + 1F R44 220K C26 250p R101 220K C27 250p R953 10K R960 43K R961 100K

38、C917 39p C916 250pF R954 4.7K n/u R955 C913 10K V- TRACKCH2 -15V +15V A2.A 2 3 + 1 8 4 R944 220K c926 250p R9716 10K R9736 43K R9710 100K C9733 39p C9734 250pF R97293.9K A2.B 6 5 +7 n/u R9741 C9730 10K V+ TRACKCH2 R9100 220K C927 250p R72 R15 R57 220 220 Q9 LM1117 Adj SMT 270 Q217 Q218 R2217A 1.68 x

39、6 R2217C R2217D R2217E R2217F R2217B R2218A 1.68 x 6 R2218C R2218D R2218E R2218F R2218B Q219 Q220 R2219A 1.68 x6 R2219C R2219D R2219E R2219F R2219B R2220A 1.68 x 6 R2220C R2220D R2220E R2220F R2220B Q117 Q118 R1117A 1.68 x6 R1117C R1117D R1117E R1117F R1117B R1118A 1.68 x 6 R1118C R1118D R1118E R111

40、8F R1118B Q119 Q120 R1119A 1.68 x6 R1119C R1119D R1119E R1119F R1119B R1120A 1.68 x 6 R1120C R1120D R1120E R1120F R1120B 2114 2114 2114 18 OCT2008 REV E first step out of R/D design. Changes from Rev E to Rev F Corrections to ground plains and changes in footprints. Also changed to front panel layou

41、t to match DCMseries layout of LEDs. DCM2, DCL AND DCX Dual TRACKER hs1hs2 HS3 hs4 hs5 L1 MP1MP2MP3MP4MP5MP6 -15VDC PRI +15VDC PRI A801.A 2 3 + 1 8 44565 -15VDC PRI +15VDC PRI A802.A 2 3 + 1 8 4 4565 PWRCOM VREF C2 + .1u A802.B 6 5 +7 A801.B 6 5 +7 C28 + 1F R28 R26 27K 10K R23 1K PWRCOM C32 + 22uF Q

42、3 PWRCOM VREF +15VDC PRI A803.A 2 3 +1 -15VDC PRI +15VDC PRI A803.B 6 5 + 7 8 4 4565 C804 0.1F 1uF 250V AC C740 1uF 250V AC C760 1uF 250V AC C768 C748 1uF 250V AC C728 1uF 250V AC C720 1uF 250V AC C700 1uF 250V AC C708 C31 + C33 + C34 + C35 + C36 + C37 + 5550 Q4 R27 2.2K R73 33K R74 33K AMP1 +DR AMP

43、1 -DR AMP2 +DR AMP2 -DR AMP2 +DR AMP2 -DR R75 10K R76 10K AMP1 +DR AMP1 -DR R77 10K R78 10K J5 2+ 2- 1+ 1- V+ PRE R79 R80 100 smt 1/4w R81 220K 1.5K D7 BP1.A BP1.B BP1.C BP1.D QC3 BRDG AMP CNTRL2 A5.A 4 5 +2 A5.C 10 11 +13 R105 1.5K 50 % 80 % R100 2.2K R97 3.9K A5.D 8 9 +14 A5.B 6 7 +1 ch2 50% D624

44、ch2 80% D623 ch1 50% D614 ch1 80% D613 80 % 80 % 1 C70 + 1 C71 + R108 6.8K RAIL+ CLIP CLIP CLIP +15VDC SIG SIG SIG 50 % 50 % RAIL+ R13 BRIDGE D1 4.7K yellow -15VDC -15VDC L2 L3 R82 0 22F 160V C38 + 22F 160V C39 + R83 C40 + 100 .01 THERMAL DIODE V+ PRE V- PRE L4 L5 +15V PRE -15V PRE C44 + 1F R84 R85

45、OUTPUT1 220K 910 D19 R94 R95 OUTPUT2 220K 910 D22 220pF C43 R106 1K R107 1K 220pF C45 R206 1K R207 1K .1F C46 + +15V PRE .1F .1F C51 C50 + + +15V PRE -15V PRE R109 10 R110 10 C25A + 1000F J1B n/u J1A N/u 100K R111 100K R116 J7 n/u J6 n/u C47 .0033uF R117 22 1W R123 n/u 1W .1F C48 + +15VDC -15VDC.1F

46、C49 + -15VDC 560pF C189 560pF C289 .1F C52 .1F C53 R124 221W R125 221W R126 221W H4.A H4.B H4.C H4.D 1uF 160V C21 2.2uF 250V 1uF 160V C56 A4.A 2 3 +1 A4.B 6 5 +7 D3 D8 R5 220K R6 220K -15VDC -15VDC +15VDC E1 HEATSINK E3 HEATSINK E5 HEATSINK E6 HEATSINK .1F C9 .1F C60 .1F C61 HBIAS2.A HBIAS2.B HBIAS1

47、.A HBIAS1.B HTEST1.A HTEST1.B MJD340 Q10 R7 5101W R8 5101W R9 5101W 1000F 25V C62 + 1000F 25V C63 + C707B + C727B + C747B + C767B + N:76 R11 100 R12 100 R35 100 R58 100 56pF C66 56pF C68 C69 + 1F 400V PWRCOM D9 R62 6.8k R805 2.2K for DCM3800L VALUE CHANGES BETWEEN DIFFERENT AMP MODELS: DCM3000L: R49

48、, R56 = 100 ohmR49, R56 = 100 ohm R805 = 2.2K DCM3800L: VOLTAGE DOUBLING OFF ABOVE 140VAC MJD350 Q122 MJD340 Q121 R155 47 R154 47 R156 220 R153 220 R157 22 D111 1N914 R152 22 D110 1N914 MJD350 Q222 MJD340 Q221 R255 47 R254 47 R256 220 R253 220 R257 22 D211 1N914 R252 22 D210 1N914 C22 .01 #2358 -15

49、IN +15 IN A6.A 2 3 + 1 8 4 2114 C55 22 + 120pF R103 R102C74 10K 10K A6.B 6 5 +7 120pF R135 R147 C75 10K 10K 39pF C78 120pF R3 R1 C73 10K 10K 120pF R148 R158 C79 10K 10K 39pF C80 C81 22 + C8322 + C84 22 + -15 IN R159 0 R169 0 R175 100 R180 0 Changes from Rev H to Rev I Corrections to ground plain short near R156 on rev H. Added input dif amp on input jack PCB to reduce noise in cabling. 16 JUNE 09 J Changes from Rev I to Rev J 0.047C410.047C42 R181 10 1W Added bypass caps. Added resistor r181 at C69. Cap added at Q7(C41) and Q8 (C42). Moved R834 from +15VDC PRI t