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EX354D/T/Tv Service Manual - Iss 3

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5. 278 SEE AB RIS4 278 Cig7 Eige SEG BB DIG 7B 1gU m ANB 74 ae Riss 270 a S m sg a 7 1 SEG CB u i AUXB 5V 5 AUXB aVA RI5B
6. SEG BB DIG 7B 2 ISS A 5VA B SEG CB LEDIa2 SEG DB JCIg2 D SEG EB 1 K gt 10104 VPD SEG FB VPRTB o N FD4g52 2 vss VEE SEG GB 7 RPI83 15 ia SEG DPB 5 B_HPI 3
7. Wd R53 56 25 22 SEG AA CI R54 55 27 uch _ 10U aan SEEN e DIG 7A 35v lt lt Ria 2 16 B 7 RSS 56 Eus ed lt lt 228 LED2 AUXA 5V SEG CA 0 ou Y a aa a AUXA BVA R56 56 A
8. LT 22H LK7 HT 5 04 IRF 740 ONSK7 Pav PJ4 ON OFF SWITCH cu m CONNECTOR AN7 Y d v VDRI C7 a V275 470N SNZ AZEN eit L LA2 A X2 ILAN Y x2 FSI Aa 2 ZAT due O 1 2x 2x HBE et w GER plug 3 3mH 3 3mH vV BRI Qw75 Pav I S PJ4 A DSSBBa BH RIZ Leia 3 LI B 4 3 LZ B 4 7 5 2 1 a 15 aT 628 li 2 e o oe E 22aK T E guia sa c 7 2 1 3 3 4 ig 1 LI A 2 1 L2 A2 a g x IN N PJ4 B i IKV IKV O e Ld PJ3 2 CR ANZ D2 O Y
9. 100 IUg un IDAIT VRECT MAGAMP VDRI v275 22 258 25gv HBC c MA L X2 X2 PP v 250V E 04 EB LA26A LI B 5 250 Ig AROR 5 dd 358uH BUzIA AUXA 15V 1BMH LBMH 2 N n u n IIN5PA e N PJI E jia 3 4 PI4 B k vo I F AAA r PJ3 C E 2 RH BN V Sean 2 7 99N p 2 R43 PJI U a 47R B4 IKV R2B paip R37 JA 220K 7 5 BRI 47 33v 22 pa ji R44 7 Pu en T Ws SKBRI L INH 574 15V F PE Ha IBOR m Li A 2 L2 A 120X868 220K C27 4 RIN 225 D zw wa AUXA OV 5 PJ3 B LBMH LBMH 3 3 Meo fle W75 2N2 3 Pav i 22R 47K IN 32E I3 _ 1 255 4 CI PJ4 A G2A KK 4148 SFHBIBA 3 D33 AUXA VA 4 PJ3 D O 100 CHASSIS 470P ANS nass 18V 4 5 25gV ON OFF RTI 4 4 IKV a je Ol AUXA 5V g PJ3 E O4 X2 PP CB SWITCH BA TX2 A wy Riaz MJE A OR FI2 25gv 069 D44 358 R55 GATEA 4N7 CONNECTOR ign B
10. DB BYV27 FEB R4 487 gt 0 e e PJ5 4 R125 SENSE C c29 C39 2 2K2 RI26 2U2 10 470 SENSE C PJ5 3 I 4 PEN MAGAMP 54 50V 4 D36 be VE O PJ5 IBAN E E R137 BVL 153 PJ5 2 SKD28 3 i WEB 220N ED 3 18 V WED 119 uH u 016 EC e e ET CAAA _ EXE PJ5 7 DIZ a R59 5 CHASSIS Foz lg 2 R27 27 m V m E 4 gt 2 6v8 P3 GKDIB 522 G SENSE C RBB PJ1 A 2W W35 NES 22K E D28 a 3 d nn C22 PJI C 2 A BAS2I L R8 SND RIIB S BO H SZI 470P R30 ice was IKB V 4K7 i 220R e i C38 R33 18 e lt B 220R p32 58V JN 2 1900 s A52 1 C78 10 V IBGN R76 1000 C43 a e IBV IWAN 5 3 D12 HP4 7 e 2 LM35BM R117 VB R34 220 04 BC849C Dg RIIS 2W MR 4 020 RIBI BAS2I 43K y VC RIBS 5VC SENSE C h5 IDK
11. SEG BA DESFA Es 8 5VA A SEG CA SEG DA SEG EA 5 104 SEG FA VPRTA o CD4952 APS SEG G IPHIA 15 _ 8 APS 13 SEG DPA SENSE A N W AUXA 5V IOHIA e Ag c3 cia AUXA OVA 1ggN 33UN IBAN PE PE 2 5 3 ILOA cn e ES Bi E3 330N AUXA 5VA 5 2 1 va 58 VOLOA s c2 R24 10K 3 R25 22 IC2 C MUXIA g 5 v e 190K LE EI 1 MUXBA sa E7 CE ll 7 47U AZA AUXAZ VA 5V 9 7 AUXA GVA 5 IC5 8 5VA A iex m 8 220 5 Q0 SB p2 22 OP A AUXA 5V 13 4 R48 5 LIS 1g 20 J YI 10 14 2 12 Za A TO DZA ADCREFA B s 8 2 AUXA BV Ice CB 3 IC5 C 5ENSE A 574 IBAN gt ETA 338 ICOMA BBA _ lt 19 SEG DPA 1 3 18 BUM SERUUM ICOMA AUXA BVA 2 _ 4 17 SEG FA AUXA 5V AUXA 5V _ IB SEG EA TR 8 D 15 5 LEDI BSA _7 14 SEG CA O P ON VRB AUXA I5V 8 13 82155 Mauser 2 SENSE A BBA SEG BA SWI RI Bra 8 12 SEG AA aud CLK 1 H 22P AUXA 5V
12. MAGAMP 4 A LB 1 350UH LKI7 Fr L 014 AUXA 15V a e EG PJI 5 L AUXA 5V R28 mza A oss R37 cag NN IBAN RIN x 47 aw Bzx 22 2w T 79c39 100 PJI 7 22 at GATEA AUXA BV 257 R102 J t R85 x TIC 120 x D24 AUXA OVA D25 126D 2K2 BYV je on 4 TX2 A IN 15 c20 MIE 922 AUXA 5V 414B ON 470P Sairas SE A BZX BIO Ski C31 ABS GATEA D44 10AN 22K T 9 PJ1 2 SY e 580v e 4 D PJ id a 9 DP ZA 2 26C N RII4 2K2 T 2 erg pi5 Jr ick D y IE ES 5 4 y PJI 3 non SAVAN x x 2280 400v 53V e e e Ld R29 270 D3g ris Mi Rag E51 BY BaN BMB 16 R 1 63 33K W 21 SVE 480v mm 4 OEA MAZ AUXA OVA MAGAMP 4 A 28 END 1 350UH ER Wan ana E an a AUXB 15V e ar E PJ2 5 R124 cal SKS R45 AUXB 5V la 010 47 DBa 738 22 1025 5 218 R as H zw J W Bz GATEB 2 7 79c39 259 RIB3 RB7 HO Pi2 x f TIC 100 R41 x 09 D26 AUXB OVA D27 125D 2K2 a BYV 21 ja 012 N 034A FO PJ2 4 4148 32 470P pam MJE BZA AUXB 5V SN Is IgggU 35 330 W C18
13. Da BYV27 R4 4R7 ST V J e Is 5 C29 c39 i OP N 2 115 2K2 C P E 2U2 IAN V 4 OPJ5 T 58V en a R126 5 A pjg D36 470 SENSE C I ceng IB NSN Sun 3 W35 S LOPJ5 Vis L SKD2B SENSE C E E 53 I MB ExmZ2UN ED E 3 118uH 400V PIS r o Pr V NG 016 f O LED 2 opus 3 R58 5 CHASSIS 52 leg 2 DIG 2 T 5515 4 R27 22 TP3 Er 5 47 9 D70 SKQIB K SENSE E 188 PJI A gt W was J 2 4K7 yi D W35 3 D35 E D17 BYV 3 013 DE DI E 2 lt RB7 PJ1 B BA521 7 PJI C wie BA521 ia wa 2 350 A W35 RG 1 so 22K R I8 2 PUE 2K2 5V e o L e R33 10 NEL 220R 58V 31 R107 400 78 N 10K 1 3 vw i 521 1000 0204 D12 ja R76 ay C43 BCB49C val N iN No cS AVN0 e N 2 LM358M w35 ja 2W MR VC RII 43 SENSE C SENSE C IKB RIQB 10K L FUSIBLE RIZ9 2194 RI D V 5 C5 VC 4K7 V ION i R114 489 paw YE 19K B L VR2 RIIS e LM35BM 2K 7 3 oi RIS LM358M IDK 2 IL 300 DEDA W R12 4 SENSE C 8 Lens Va VE 536
14. NO VSrd 22 2 2 NO W s m 200 1011X IZIdSIa T T T 1 O 1219 111 2002 I WB MN VI SSI 08 S5SSE AL GvSEX3 gru 1 VAG v3Lv9 EZ BZ zD 2 2 D N sa N 3 E 1 1X A D n s UCAD LE e N BZ bd SIG T T T T 50 Circuit Diagrams 51
15. EVAZA R153 56 RI25 22 SEG AB 31 e CI FIg7 TIBS SEEcBB RISA SB 1au IN DIG 7B 1 35V m m m R11g 6 7 RIS5 56 Y eke m m m 220 LED1g2 AUXB 5V 1 SES CB g Y mom a AUXB BVA RISES 5H a n Ra ika 12 gt 5VA B 5EG DB VPRTB e s 14 odes RIS7 56 9171 ip 4053 gt 13 7 7 IPHIB icma T BT RISB 56 I H ig 9 B 1 H ig 8 RI72 11 Ns E SEG FB lt u n m m 5 L Ny m D I B SENSE B VSS VEE niga a a IOHIB Lis 8 7 OE 5 lt B ME Rg cua 5 ASS So 4053 PEPEI c a3 33UN Riza SEG DPB VOLTS AMPS IN 63V 2 5 AUX 9VA 5VA B d r ES 4 ILOB m 5 2 8 X 56R 1 u 1 B 4 u EL u 1623 2 C102 5 1 27 3 4 5 5 I 2 37 47 5 S 2 9 10102 8 gar IggN 8 VOL OB Doo w 4053 Ic as T F347 1516 L fyi BEST AZB 15 2 2 A B Y MURIE E 10105 7 AUXB 5V mE 5 LF347M 1 f AUXB VA ICOMB AUXB 5V 5 20 ZI us 4 574 zB y 220N v c as 8 ISTA aay 511 PIDZ Y 3 053 B s R117 OP B O 13 R148 Yi 2 ORI 14 Ic1a5 D 14 ja E3 7 a Ka Ren J 4 10 0 8 SENSE B AUX V a s 10105 0 12 LF347M 8 190 R122 330 1 186 C108 n 5102 7 AHCS74 Em IBAN 8 BOB 2 19 SEG
16. 45 5V 3 3V Output PCB for Version 3 PJ1 FITTED ON S i UNDERSIDE r RIIS R87 CIC 5V PCB 35555 4580 1 pys LED 5 SE 5 V 46 1 5V to 5V Output PCB for Version 4 III MA3 I D LC YYGo JSA lt E a R124 N Ics R125 HIIHH _IC2 BICE 114 N P 2 n 8 47 Control for Versions 1 amp 2 35555 2600 8 1 zal 423 48 Control for Version 3 2108 D107 10107 PJ192 EEEE J iD IN x 2814 a 9 N 3 8812 Ea LDA 1219 35555 4368 155 2 Control for Version 4 Evid eds a a 9 N 2 2 2 81 u gt g S n 201 40121 VAS Ag AS VAG AGI BA galv9 PJig1 840 ul ZMS 1213 SI 1018
17. MASSA 100N SSEMSEDA ja AUXA 15V ICOM CHASSIS B e IN d 5 O voLTS FINE 4148 D7 IEDMA LED iEpig3 AUXA 15V TT e N BUS SVA 190 N R26 IgM p R41 TE PJ2 7 CURRENT VH2 R36 149 47 4 3 R23 4 amp 107 0 oP GN aaa O LED LIMIT 470K G LM324 ON OFF AUXA 5V VOLTS COARSE M R m KB 1 n 1X R38 4K7 JE Pll 7 LIN 5 3 LM324 gai NOT FITTED DN EX354D VERSIONS B a 1 R30 228 R40 100 2280 5 4 R35 C42 e e GATEA PJI B k 2 2 14K3 1 R38 4K7 47 gt ESE IBEN co 27K c24 75K 2 D3 5 LIN 220P 00 P 400v Tee U R31 PJI 4 Tm 4 5 5BK R32 AUXAZ 5V 537 AUXA BVA CHASSISZA 1 a 10K 228K ION 1 PJI 8 a 037 47 2 AUXA 5V ICOMA R33 DI TE e R49 IN4148 1 O Fi2 SENSE A ADCREFA 1ggN 33 e o e e o ICOMA gt IN4148 AUXA 5V FITTED NOT FITTED XX FITTED ON EX354D SAFETY SOCKET VERSIONS ONLY Versions 1 amp 2 Sheet 1 57 SEG AB z CI
18. LL4148 ICOMA AUXA 15V JE PJ4 B O 5V E34 o e ICOMA AUXA 15V EHE VOLTS FINE 47 m R26 1gM 1gN LL4148 PJI E 5 Det z ym CHASSIS B wav R23 R36 R41 3 25 ALIXAZ BVA pU PJ4 F Q LED 2216 22gk LL Em 2 LIN N CURRENT VOLT COARSE o o 5 x o CEDARS LIMIT 5 MHZ R34 3K9 RSI R38 4K7 AUXA 5V AUXA 5V D3 LED 4 Sw3 B 3 nS 2 7 7 Bec R40 108 114148 PJI G 7 NO 2 4 5 10K C42 pw e 4 C27 C21 un PD R3 2K2 R35 12K 2K4 4 7 47 T 1 BATES 1 PN man 2201 75K i 5 av 026 27k vn 4 e z auxa sv PAIRE GB au 56K VERTA C32 C36 I 8N AUXA7OV 35V R37 r 15 47P en l 220K 19N IC7 B PJI D 4 e 2K2 RSO Ld LM324M PS R49 1a 637 5 URBAN CHASSIS A sc ua e 2 LL4148 ape 5 4 COMA UN 190V AMT R33 R4 7 Eos 15K SENSE A e E PJI B 20 AUXA 5V D2 ADENFER 414 ICOMA Qo SV e LL4148 PJI A OP A PJI C ICOMA i EX354 Control Pcb VA Version 3 Sheet 1 59 AUXB 5VA
19. SK2 av aan 2 0 4 GATES T 4 1 PJ2 2 4 e o OP B RSS PJ2 1 R aa c96 c59 2K2 vB 077 W N C62 E71 N 228 TOKI A awe PJ2 3 400v 53V e e e e e e e e e R32 270 aws D3 BS C54 10 0 6MB 100 R64 33K 21 5 400v aws EB AUXB BVA GND R33 4H7 H57 2K2 1 D37 VC m BZx78C 5VC PJ5 2 Dil EB C28 HSS aie CIg4 umo LO BYVET 202 IBN 5M8 SENSE C PJS 3 23 Saa sav vi PS sENsE C 410 DwB FO R34 L8 1 OP C PJ5 4 2ggUH FS2 V Ld d 1 UKI 4 L E SA C57 END SENSE C PJ5 5 e VV E IggN FO R49 22K LED PJ5 6 D52 R46 016 O h R35 F ZX BUZ LED PJ5 7 D12 47 R39 71 ON GES FO 2W 22 SKB L Alay SENSE C 232 DBI AK7 nen D28 Pm TIC 220 aw 235 44 DB3 ADJ BYV C22 125D je r u ns 32 47gP BZX IN N gt IN 4148 2K2 4148 ON IK cal C42 c100 R20 SK3 IDEE 017 H Be IN 104 Ria e 422 al Be 6 e ee M 10K A 1 IC4 A D4g gt lt LM358 E m 017 PBS DE 22a D36 3 dh 57 BAV21 mod en IN N 736 IgK 5V5 e e e e heise SENSE C SENSE C R36 278 R52 2K2 535 FB5 p 4R7 AUXA 15V
20. ES VOLTS FINE Dan FJ1a3 oP 47 PJig1 E 5 RI2BIgM 9 ON OFF mer gr Dia 2129 c za ans SwIgI B RI35 PE AUSBATSNN LIN 470K 220K T 5 220P a E PJig1 H B VOLTS COARSE ha e RI34 HI51 7139 4K7 AUXB 5v AUXB 5V 2 a a 10 lt as A a 2181 57 ja 5 18K 4 CBB LMa24M Le 127 cza 121 ZUN VRIG9 202 5 12K RI3SA ZK4 RI38 4K7 47 IDan TR 2280 mist 4K7 75K jee PJIOI F 6 7 wv 5 27K o 2 4 AUXB 15v 100 Ria1 RI32 VPATB T 0132 136 ggN AUXB BV 35v i 56K I RISB Scie Em 400v ia Ri37 uN 47P IC187 8 2181 54 gt 22 aav 5 LM324M ade Pigs j T PE 50137 CHASSIS B 112 dus PJig1 9 1908N us igi aav 14148 15K SENSE B PJig1 2 par AUXB 5V Diaz IF MB AUXB 5V ADCREFB 4 4 PDA 4 PJig1 A 1 ET EX354 Control Pcb ICOMB PJiai c O 34 sar PIEN Version 4 Sheet 2 62
21. RE 8 V N x 1c5 C n i 3 5 BEN BC848C W _ L Ma5BM V 7 4 1 I JA Tl a 2 JSA B iss al V R2 V LM358M SENSE C e V 7 E V IF1 F LM35BM V 4 SENSE C EX354Tv AUX Output Version 4 56 SEG AA
22. R20 CHASSIS HT 254 KD54 3 4W VRECT P5 Bed HTF D53 H BYV26C A 2N2 aI 4 M RI3 161 19 R135 L3 B 22 2 390K 270K L R79 3 4 cag 33K RBI RIZS 2gN 2W 10 190 E Ex 28 250v Aal BYV27 lgYv2gc 2N2 390K 338K UVL zw BYV2BC 2 L 7 cs Iau 3 Ah d 5 C2 tds m R36 RBD IN 22gN id 270K 33K 1 MJRHB6BLT zw 41 pea RI29 RB1 RI3BA 84521 22 430K zw TI 338K 4 R74A E 1300 BYvzec DHE D56 22 BAS2I 470 39K ws R74 RB2A dh 4 TX2 E 200K aan 392VI ZW c32 UN R82 ns I9U R75 200K 430K BYV26C n 50 2 cia FB4 220N 978 22K 53V IagK C84 7 19 1 13 14 33UN Pav 160V Vrms u gt a 3 15 g E gt PR 07 gt 5 55 es Lo IRFB Ica Outputf 8 190 1INSBA H m L4 BIA HIT sav 23 mom A Bes wo Z2 m pk 2G 044 n n 2 8 5 8 18 17 0 12 RI4 i 22 D52 JA 4 3V3 ts 4 ss p53 Dsg RIB m7 le 358 SN H BAS21 SIZE 22 721 lt Cizg non 205 nena 4 IggN man 468 RIZ I5V POV C68A 478 iaaNn 2N2 nz RB 3 077 sav 470 3K3 pag BA521 ceg POV 470P Rz RIIZA Lis naz mav 27K BS 478 5i R 5047 5c 1 2 2W MR S2 lt m 1 TX1 cng PAVPFC t 3 TN FPPVTXDRV
23. 1 9139 4 7 PJigi LIN 8 5 ee 127 128 121 VRIg1 A e i 2140 190 2200 31 jm Rag 3 HISE 142 1 4 _ GATEB 2101 B RI27 2 ee vrias Riga I VRIBS 2K2 14K3 IX 2136 4 7 47 CIBE Ban taa oan i ase 79s e Dias 400 AUXB BV 1BU LIN 220P 1 T E IN414B Pian 4 1 3 pls a a8 R131 R132 x v RI37 114 AUXB VA CHASSIS B 56K TORS 5 220K ON 1 cs PJig1 9 e 2 i x 7 AUXB 5V ILOMB 2 amp 2 hi 21101 2 dd R149 RISB NATS c12 10K 1g SENSEZH FJigi 1 OP B 5 ADCREFB o e o o e e Diaz cT sus Pug 30 RIZB 11K IN414B Ei NOT FITTED VB EX354 Control Pcb Versions 1 amp 2 Sheet 2 NOT FITTED AUXA 5VA E
24. 108 109 112 127 128 131 C1 101 C10 11 110 111 C36 136 C13 14 35 113 114 135 31 PCB ASSEMBLY CONTROL EX354T Versions 1 amp 2 44115 0860 continued Part Number 23685 0007 25021 0901 25061 0200 25061 0519 25117 0020 25336 5590 25377 5490 27 106 0508 27 106 0646 27161 0130 27164 0507 27226 0520 27226 0530 27231 5740 27250 2001 28502 0010 35555 2600 Description 100NK 250V P P MKP4 P10 DIO 1N4148 B R LED T1 ROUND 3mm RED DISPLAY 3 DIG 56 LED 9MM LEG DIO 1N5401 TRAN PNP BC559C TRAN NPN BC549C IC LM324N NATIONAL 14 PIN IC LF347 BI FET AMP 14 PIN IC V REF ZRC250 2 5V 3PIN IC ULN 2003A 16 PIN IC 4052B 16 PIN IC 4053B 16 PIN IC 74HC574 20 PIN IC MCU8 PIC16C55A 04 P 28 RESONATOR 4MHZ CSA4 00MG PCB CONTROL Position C2 102 D1 2 3 4 5 7 8 9 101 102 103 104 105 107 108 109 2 101 102 103 DIS1 2 101 102 D10 110 Q1 101 Q2 102 IC7 107 IC5 105 D6 106 IC1 101 IC4 104 IC2 102 IC6 106 IC3 103 XTAL1 101 PCB ASSEMBLY CONTROL EX354 Version 3 44115 3010 Parts shown in bold are removed on EX354D Version 3 Part Number 20661 0851 22218 0213 22225 0220 22573 0048 22573 0207 22573 0209 22574 0120 23202 1330 23202 4180 23320 0003 23347 0330 23347 0340 23377 2220 23377 2470 32 Description SPACER 56 INCH 7 SEG LED 3 5H SWITCH SLIDE 2P2W SWITCH PUSH PUSH SPPH11470B
25. IC SM LM324M OP AMP IC SM LF347M BIFET OPAMP IC SM V REF ZRC250 2 5V 2 IC SM ULN2003AD IC SM 4052 IC SM 4053 IC SM 74HC574 IC SM PIC16C55A 04 SO RESONATOR SM CSTCR4M00G53 R0 PCB CONTROL EX354D TV UL 5V 3 3V OUTPUT EX354T Version 3 44115 3050 Part Number 20613 0007 20670 0135 20670 0300 22040 0940 22154 0510 22154 0600 22315 0459 22573 0041 23202 0220 23202 1536 23202 5680 23210 0470 23222 0047 23222 1220 23222 2220 23271 0020 23377 2220 23424 0468 23557 0818 23557 0822 23620 0268 25031 0060 Description SIL PAD TO220 PLAIN CLIP GP02 FOR PCB H SINKS HEATSINK PCB MTG 63MM PLAIN BEAD DOUBLE FERRITE MAGAMP 5V 5A EX354 CHOKE 110uH AT 5A EF25 FUSE 4 0AT SUBMIN PCB MTG UL HEADER 2WAY STR SIL STD GOLD RES 22ROF W60 50PPM RES 536RF W60 MF 50PPM RES 6M80F W60 50PPM RES 47R0J 2W 250PPM RES 4R70J W33 FUSIBLE NFR25 RES 220RJ W33 FUSIBLE NFR25 RES 2K20J W33 FUSIBLE NFR25 RES 0R047J 2W MR RES PS H 2K2 CF 10MM CAP 470PK 1KV P5 2U2 50V ELEC LOW ESR P2 CAP 1000U 10V ELEC LOW ESR P5 CAP 220NK 400V P E 468 SER P15 DIO BYW100 200 Position Q1 0101 Q2 0102 IC7 107 IC5 105 D6 D106 101 4 104 2 102 6 106 103 XTL1 XTL101 Position FOR SKD28 SKQ16 FOR SKD28 SKQ16 SKD28 SKQ16 FB6 7 MA3 L8 FS2 TP3 R58 R124 R128 R137 R27 R4 R30 R33 R34 R125 R76 V
26. OSC ar 4MHZ 1 10101 3 26 10107 D IK 10K Plg1 LULN2 A 05 2 212 R143 R145 LM324 a 5 e IOHIB S183 yss 25 ERN AUXB V 0101 QN 470 N 16 5 24 ec lt cig RII5 BIB 1 DIG 1B E zB ciao NZL REB 558 14 220 2 15 DIG 2B AUXB BV 23 1 12 ON 528 Ra PIE RES e uv 3 14 DIG 3B MUXIB T hga pral 5EG ENB RI P103 s 1 4 13 e 8 55 21 L AT IK DIG 48 RC3 sa gt SF ATB JLIMITB R i osa 8 12 DIG 58 DE INTB 9 4 RC e o bo vRIBA 2K2 CHASSIS B BBB 8 DIG 68 w aa AUXB 15V 1 7 7 piG 7B M ag rca S A TO D7B cis RI42 3 wi 122147 878 202 220 RI4E 3kg n AUXB 5V 13 ja 16 BEB iz LM324 T CURRENT Tm p 83 RB n el AUXB BV 14 B58 55 RB4 RBS 7 VREF vRig3 B4B 31 8 AUXB V 4 R123 B38 e NL JE 4 IPHIB SPARE C143 2 S D106 5 BIB ZAC25a COMB e e o o c 35 4 AUXB 15V a ICOMB 5ENSE B m AUXB 15V Pig 50 1 1 e 4148 D187 ICOM AUREZ FENA VOLTS FINE AUXB 15V Swia1 B e q IN ci29 VRig2 mab i R135 cna Ang Ema Hid 2104 3 R129 4 ICIB7 C Bro 1N414B 2 470K m LM324 ON OFF s W 1gK AUXB 5 RI34 RI d VOLTS COARSE o 14K99 1
27. SVAZA R25 22 SEG AA ci 4 EE 854 270 lt 9gN SERBA DIG 7A lt lt DI 2 R55 270 Non lt lt lt a LED2 AUXA SV 1 SEG CA 5 55 T a aa g AUXA BVA R56 270 a aa 2 gt SEG DA f 1 Da R57 270 R7 n a 4853 IPHIA R58 270 HEHE A72 n 24 VDD SEG FA N om m 4052 Bom SENSE A VSS 590338 bla 7 12 SEG GA 1 tass a BB ea ca cia 5 HBg 27 3305 Heg 3 SEG DPA 2 3 AUXA OVA SVA A a au ILOA s 2 B X 2708 4 L T Ya s 4 4 16 n2 mk ESV PE s 102 8 2 n eye 8 1ggN n vw 4053 jC5 A 1 1905 150 i LF347M 11 Sab Yi 5 AZA 2 Ba La Bi MUXIA s 1c5 8 7 gt MUXBA ig 1 4 P2 AUXA 5V ICOMA s OP A de Bi ZA 2 FI R21 SENSE A VE 220N ILOA IFB 8 EAA Bav ma R22 V 74HC574 4053 13 RI7 13 m Yi i4 eae 1c5 D 14 ge F 12 2 i LF347M A TO D A 52 AD ADEREFA e a IC5 C 8 12 XA AUXA BV 5 AUXA BVA L A us IC6 A als 74HC574 aan RANTA Ale mo 1 BOA 2 19 SEG DPA JE SEG GA BIA ICOMA 2 4 7 vas Cza c22 ig BzA SEG FA AUXAZ 5V voLoA 2x2 mau IggU ioan iN5401 B3A 5 15 sav 5gv B4A 2 9 15 SEG DA AUXA 15V Ip ge BS
28. e J S 398k 20 12 TX2 C SE RI AJ d ssa 0908 DEB D56 cas 4 n c37 3 2 2 22K 2 22V BAV21 BYV26C EIE R133 wa 470 7 10040 lt DP B 1 360K R75 HB2 apv 39K TX2 E PN 5gV C385 C62 u OP12 R7I El l 39 2W 4 x L DIG FB3 Gan eee 220 4 m IN Eie ms VB 3L 33K N BAV21 AL 470P 2280 2k2 OP12 4 IBBU sss BYV28C BYV26C IKV 50v e e 2 e 2 0 IBN C54 C56 ay 1 9 C77 832 278 BWS 031 7 220N 228N pov 228 189 PE 58 R93 R88 FB4 IggN BAV21 non BMB 6NB 400 4aav 63V 4 E 22K 400V RB4 53V wea L wea PE PE PE PE O 294 AUXB OVA CHASSIS 7 4 19 1 13 14 330N Pav Iw DB 5 SKO7 s 7 KI En So PP a7 BYV27 487 aFP35 4 5 SS UU 28 C87 IRFB 6 5ENSE C ICB IU IggN RIS HN NIIN5gA RI25 RI28 5 5 2 L4981A M sav 63V GIA 47R 28 39 2K2 SENSE E Opis SYNE el ss Be s PE ayes WH MAGAMPISA1 202 ION i ME ME SES SG E 3 mo g 3 E T BAN 5 9 _ Ba 053 PJ5 2 4 skas Cus YY Y II wa BMB g 220N 2 5 17 2 1 3 GENSE C Wea LED A DE2 P GIB E 4 ua a M K i O 4 9 LED H IKV
29. els BYV27 L5 d R7O j 5 Tx2 D 22 1789 75 73 0025 cas R23 R58 ces 021 47 IBU au Ges 22 BY ay Tees man wa w s v s v l Em E EX354 PCB D14 220 1023 AUXB BV AUXB BVA 35v 5V1 BAS21 T was Versions 3 amp 4 R28 IK ray 54
30. A B or C on the schematics for Channels A B and C respectively The topology employed is a double ended forward converter with isolated secondary windings for each output which are regulated by means of a magamp pre regulator followed by a MOSFET linear regulator Mains Input Filtering and Rectification 10 The AC input is via a pcb mounted IEC plug X capacitors C1 C9 and C47 together with the Y capacitors C6 C7 and common mode inductors L1 and L2 comprise an input filter which ensures that the supply meets both conducted emission and conducted immunity EMC reguirements VDR1 clips mains spikes for component protection while R1 discharges the X capacitors after removal of the mains supply Pcb mounted fuse FS1 limits damage on boost stage or forward converter failure The front panel mains switch is connected via PJ4 The bridge rectifier BR1 has C11 and C12 connected across it to bypass noise signals and to snub reverse recovery transients in the bridge rectifier C89 further decouples the input filter and rectifier from the boost converter while R113 discharges C89 after removal of the mains supply RT1 is an NTC which limits the initial inrush current into the boost stage output capacitor C88 Primary Boost Stage Control circuit The primary boost stage control is by means of IC8 This contains all the processing circuitry to shape the current taken by the power supply from the mains supply to be sinusoidal and in ph
31. 1 223 C31 oo SWI C20 c22 10 IN SEE RIS R7 33K 217 IgM BB SEG ENA AUXA BV 47 i68 n vOLOA 2 2 5 424 BS Ds i en 22P BE jag IN D9 RIS AUXA 5V 5 22 XT s 4148 len 1N4148 4 m v 3 von asc 6 MHz au R14 1 IC7 D IK 1gK ULNZBA3A OSC2 E ig PI N _ R43 R45 LM324 vss RE AT W AUXA PV 470 s BIA 1 16 DIG 1A 5 AGB 24 ZA Bt e e RIS 14 B2A 2 15 DIE 2A MuxgA AUXAZBV 23 553 A 2 2282 lak x gt R 8 PIE RCS 5 X LKI uN B3A DIG 3A MUXIA BE ape SEG ENA ai spav _ 4 13 DIG 4A AZA apg SEG LATA 1K cis A B5A 5 dB en 9 Ina 22 o ne VR4 2K2 M 6 M 18 18 216 sw AUXA 15V 1 7 2 DIG 7A T asi Rca A TO D A Bus t 2 SECTION G REZ RE BEN 1C7 B sa 2286 R45 3KI Ao AUXA 5V 13 15 5 LM324 AUXA BV ja nds ABE 5 CURRENT PJ2 5 _ 5 2B RB4 res 825 O O rs gt VREFA vRa c33 B4A gt Lak PJ2 3 SENSE C IggN PHIA SSN n AUXA DV He IPHI O m EV SPARE F 2 1 _ VE 824 c43 Ms z BIA ZRC250 LOE 4 SNS ep An EN act BAA ICOMA 5 3 ion e e 2 Sw3 c35 4 AUXA 15V 2 77
32. 270 gt 5VA B SWZA 5 RIS7 270 SEG EB RI7I K 15 RISE 270 zl ml sl el 7 iz al al e 7 sw28 10104 lt L ynom lt u N m D RI7Z R A Eran lt 4052 RISS 278 SENSE B SEG CB 1 10102 C B 3 3 D srial 3 B H DISPIBZ I Hi L 8 255 RIGO 270 cua 5 AUXB 5V SEG DPB voLTs AMPS A pan P 220N 2 AUXB BVA SVA B D 10AN men sav 2 A 270A Wy Bee ee 8 1090 11273 SI 5 7 27 3 4 S Sec 4 4 2 RIZ4 PE ee IC192 8 Vi m a 4053 Ic as a lials LF347M lt gt lt MUXIB i LF347M 4 5 AUXB 5V AUX Z VA JCOME ACTES Vo t 28 zB 220N 2102 V 1c106 8 ICIB2 A 53V 4053 3 RII7 v 12 Em 14 10 wae 1105 0 14 vasan Z SENSE B z F347M AUXB BV ADCREF ra 5 1 1 5 22 4 1gg R122 330 a E3079 5122 ICIB6 A 74HC574 aan TOMB Bas 2 19 SEG DPB DE INTB AUXB BVA a 18 SEG GB ICOMB K RBAHEV 828 u 17 838 4 5 JE AUXB 15v SENSE B B4B 5 5 SEG DB RIBS D P DN RZ 3 vRIBB TEN B5B 2 14 SEG CB 33K LEDig1 58a 2 B pae SWIDI A RNB nc mez cstas AUXB 5V Cizg 22 1 16 55 Se FRig5 AUXB 5V 0102 100 SWIDI wou 1 1N
33. 528 ICI E 4055 e GIA os 1ggkHZ 4 D38 BA521 TXI E es ZTX751 x ICI F 4069 4063 489 12 IN4BB7 gt o gt o ai ns mas Pe BAS21 _ PAVTXDAV Ic7 A M P 1 14 14 2 sagh 2 2K7 220P aa E Pav a OP 199V 4013 4065 28 GND END u E20 POVTXDRV 7 Ee TX2 aav 3 023 CHASSIS EH PaVTXDAV n 1 7 8 V PAVTXDAV IE4 2R2 5 11785 LM E 178801 N GIB 2 C42 cal 110 IagN 4 FUSIBLE P VTXDRV EE NDT FITTED PVTXDHV MA1 MAGAMP gt LB 53 014 1 ay ae 350uH SAT S BUZIA AUXA 15V 55 i SR AUXA 5V 8 2 4 3 2 na BN EN R43 Pi R2B 22 pal ji las R44 47 D58 J i PJI Rin 2W 415V 39V I IE AuxA gv 88 22R 1013 wa I PJ ej c2a SFHBISA 3 an 5VB 18 AUXA BVA 4 47gP MIE Ns 033 W35 PJI KV H 358 3 AUXA 5V g 2 R1g2 D44 22BR 2 EATEA 2 BYV26C BAS21 w
34. AUX OUTPUT EX354Tv Version 4 SM Stage 44115 3131 Part Number 23105 0100 23105 1330 23105 1470 23105 2100 23105 2220 23105 2470 23105 3100 23105 3110 23105 3220 Description RES SM0805 10R0F W1 RES SM0805 330RF W1 RES SM0805 470RF W1 RES SM0805 1K00F W1 RES SM0805 2K20F W1 RES SM0805 4K70F W1 RES SM0805 10KOF W1 RES SM0805 11KOF W1 RES SM0805 22KOF W1 Position R87 R104 R6 R126 R91 R101 R109 R115 R118 R1 2 R88 R60 R107 108 R114 R119 R3 R7 39 1 5 5V AUX OUTPUT EX354Tv Version 4 SM Stage 44115 3131 continued Part Number 23105 3270 23105 3430 23407 0101 23461 0015 23461 0020 23461 0040 25021 1010 25132 0210 25132 0230 25132 0290 25132 0310 25377 1000 27106 1110 35555 4790 Description RES SM0805 27KOF W1 RES SM0805 43K0F W1 CAP SM0805 100P CER NPO SM0805 10NK 50V X7R SM0805 100NZ 50V Y5V SM0805 1NOK 50V X7R DIO SM BAS21 DIO SM ZEN 6V8 W35 DIO SM ZEN 5V1 W35 DIO SM ZEN 18V W35 DIO SM ZEN 5V6 W35 TRAN SM NPN BC849C IC SM LM358M DUAL OP AMP PCB 1 5 5 VARABLE EX354TV UL Position R5 R116 C1 C38 C50 C39 40 C43 C52 C46 D9 D11 D17 D32 D10 D12 D35 36 D70 Q8 Q20 IC5 MECHANICAL PARTS EX354D EX354T amp EX354Tv These parts change with the introduction of the EX354Tv to replace the EX354T and subsequently on the EX354D too Refer to next Parts List Parts marked with change wi
35. C70 71 64 C94 C33 37 C15 29 C72 73 C41 C13 C2 18 19 24 26 31 35 44 45 61 62 69 74 75 80 81 88 89 91 98 99 102 107 110 39 42 63 67 97 C65 C51 54 76 77 104 C86 90 98 99 66 100 103 C14 C3 5 9 C16 013 14 25 27 48 50 51 53 55 64 29 32 36 63 015 16 30 31 40 41 17 06 7 18 19 21 22 11 D24 26 28 D1 D8 44 45 D2 3 4 5 D38 39 D42 43 D46 D56 D20 23 D62 D58 60 PCB ASSEMBLY MAIN EX354T Version 1 44115 0850 continued Part Number 25130 9208 25130 9210 25210 0040 25211 0302 25349 3500 25349 5560 25384 9001 25383 0507 25388 0211 25388 0212 25601 0480 25601 0490 27 103 0003 27106 0513 27155 0100 27 160 0009 27226 0130 27226 0690 29212 0160 35515 1460 Description DIO ZEN 7V5 W4 DIO ZEN 18V W4 THYRISTOR TIC126D BRIDGE RECTIFIER D5SB60 TRAN PNP MJE350 TRAN PNP BC556 TRAN PNP ZTX751 TRAN NPN BC546 TRAN NPN ZTX651 TRAN NPN BF422 TRAN MOSFET N CHAN IRF740 TRAN MOSFET N CHAN BUZ11A IC LM393 IC LM358N IC ICM7555IPA IC V REG 7805 IC 4013B IC 4069UB COVER 20MM PCB FUSEHOLDER PCB MAIN Position D47 D33 34 49 35 37 D57 59 61 BR1 Q11 12 13 Q23 Q3 Q1 19 21 22 24 25 Q2 Q17 18 Q4 5 6 7 Q14 15 16 IC1 IC4 IC7 IC2 3 IC6 IC5 FS1 PCB ASSEMBLY MAIN EX354T Version 2 44115 1210 Parts not fitted on PCB ASSY MAIN EX354D Version 2 4411
36. D21 22 D24 D26 D1 D2 5 D44 45 D50 D61 D63 D69 D54 D67 D78 D42 43 D58 D60 D52 D71 SC1 BR1 Q11 12 Q6 Q10 Q3 Q2 Q14 15 Q5 Q4 Q7 IC12 14 IC2 3 IC4 IC8 PCB ASSEMBLY MAIN EX354 Versions 3 amp 4 SM Stage 44115 3041 Part Number 23105 0022 23105 0047 23105 0056 23105 0220 23105 0470 23105 1100 23105 1220 23105 1270 23105 1330 23105 1470 23105 2220 23105 2270 23105 2330 23105 2390 23105 3100 23105 3110 23105 3220 23105 3270 23105 3330 23105 3560 23105 4100 23105 4180 23105 4200 23105 4220 23105 4270 23105 4330 23105 4390 23105 4430 23105 4470 23461 0015 23461 0020 23461 0040 23461 0200 25021 1010 Description RES SM0805 2R20F W1 RES SM0805 4R70F W1 RES SM0805 5R60F W1 RES SM0805 22ROF W1 RES SM0805 47ROF W1 RES SM0805 100RF W1 RES SM0805 220RF W1 RES SM0805 270RF W1 RES SM0805 330RF W1 RES SM0805 470RF W1 RES SM0805 2K20F W1 RES SM0805 2K70F W1 RES SM0805 3K30F W1 RES SM0805 3K90F W1 RES SM0805 10K0F W1 RES SM0805 11KOF W1 RES SM0805 22KOF W1 RES SM0805 27KOF W1 RES SM0805 33KOF W1 RES SM0805 56KOF W1 RES SM0805 100KF W1 RES SM0805 180KF W1 RES SM0805 200KF W1 RES SM0805 220KF W1 RES SM0805 270KF W1 RES SM0805 330KF W1 RES SM0805 390KF W1 RES SM0805 430KF W1 RES SM0805 470KF W1 SM0805 10NK 50V 7 SM0805 100NZ 50V Y5V SM0805 1NOK 50V 7 CAP SM0805 2N2J 50V X7R DIO SM BAS21 Position R
37. ES 0 ES i 121 Sig L4 R58 478 ak Bus 12 50 BAV21 IMH AUXAZ 5V 3 ie e aM lt LM358 I VE R22 ciag li 4R7 RBS mon CZ 22 7805 v IN OUT h ja CUM Di C74 C65 TX2 D DIS C72 E23 1gN R21 R57 C44 2 4R7 CEZ 22 4 BYV 1BU 4700 2 78 e 4 IN IN 27 50V 25V PCB SINK R199 R51 5 1K Ld 5 2 hd Do Alga Boy eod 2K2 D13 100N AUXA OV 795 IDON 1N414 5V1 4 4 4 LED R25 gWB LED FB7 954 497 AUXA 5V AUXB 15V 1 nus D41 15 R62 478 IW U FB8 Bevery BAVZI IMH AUXB 5V 025 e YY R24 amp 9 4R7 Rea 190N 1 A dL 3 N IN OUT Das D21 C73 0025 CUM cas 82 524 i C83 C85 BYV Iau 47au 5 aan 79 T IN IN 27 s v SA 25V PEB SINK 15 bd e a ses EX354 M Pcb ER D23 T ain FC EA Bzx C28 D14 100N 7 AUXB V AUX VA IN414B 79E IBAN Version 1 Fr R26 AUXB 5V 52 Cg 247 Fal MAI
38. GIB ande INg 22 55 25V T 63v wa PE 0 pe IKV e e PE R n asa 836 BC548 es R35 470R E 10 19 100K 22K a 220 4573 1 023 m AUXB gV AUXB BVA EX354 Main Pcb FUSIBLE IN4148 N wa Gav POVTXDRV o E PE POVTXDRV Pav R26 BWE Version 2 53 FSI Fg C47 100 100 Ahr AIT VRECT 25gV 250 250 en X2 PP x2 PP Y 04 T L2 B afg SK04 p BMH IINSUA 5 amp MM RI 2 BRI SKBRI NE 28XBpg 25926 TBMH W 75 2N2 MV G CHASSIS ON OFF S SWITCH INE 12 250v 263 4N7 CONNECTOR ign BYV26c 250v 1 X VRECT Lia
39. L133IWINC7 AN7 Y BYM BYM RIIS TXZ F PJ3 7 RTI e 26 25C 2 O I e PJJ 6 4 O D8 PJ3 4 v du RIIB R120 rt 4007 24 oe FUE ji BYM BYM vn es 25C 25C END 4 4 is R98 06 33K IRF Iw 740 ON SKY n K H R50 33K Pav IRF RI4 1w POEN 740 ON 5K1g GIA e e e H 4 024 Bises 2 ag RB EE Pav a R 270 LK12 SiS BS Si N LK2 R22 N a 2W5 4 LM333 T Es a 1 Fw BC von BB 1 54 3 D39 L3 4 F ee na DB FgV Te D47 VREG BYV27 22 J 255 lt I Bzx T mee 79c 52 m 9536 A BZX C2 le 79C IJN C15 D7 Er DAB 1B 684 455 202 BYV R92 22 C93 TX2 H 4 IN 220 we sev 27 RSI IN 5 4148 22 19 e Ld e e Ld Ld d Ic1 8 VREG Re RIZ SN LKI4 100K 22 I 52 7 VREG R82 pi 1 X du ur s ZTX 4 551 gt Ho PE el iki 254 e a dox IN IN414B VREG ZTX 751 _ C16 Iu D53 330N LB LKH IN 9 Ja BIA R72 g J 2K2 SM N 7 8 N 470 7 TXI C ps2 HB k 1 213 4 5 5 Pav ee 1 DISCH VDD RESET n IC5 B ICS C ax THRSHLD x Ras 5 3 LKIB BB 4 CONTROL OUTPUT HT n 1N4148 TXZ J 2 ICM7555 Hd Ride lt mE 7 TRIG IN 4
40. as Q5 drain voltage is allowed to fall rapidly The energy stored in L9 is transferred to C119 via D67 and dissipated in R92 and R95 Snubber network C121 R90 D50 reduces switch off losses in Q5 Oscillator and Forward Converter IC1 A B C is a 160kHz oscillator D type IC7 A produces a square wave at 80kHz The square wave at the Q output of IC7 A is processed by R9 D99 C68 and IC1 D to give a pulse of about 45 duty The Q output of IC7 B is processed by components C10 R55 R77 and Q19 to produce a synchronisation pulse for IC8 This synchronisation signal is not used in some models The output from IC 1 D is buffered by IC1 E and IC1 F to drive the complimentary emitter followers Q2 Q3 which in turn drive the gate drive transformer TX1 TX is ac coupled via C16 and its parallel diode D1 A 15V supply for the CMOS ICs IC1 amp IC7 is derived from the primary auxiliary rail via 3 terminal regulator IC4 R105 in series with the primary winding of TX1 is used to control the switching speed of the MOSFETs R10 in parallel with TX1 primary dampens any ringing A dual ended forward converter comprising of Q4 Q7 and TX2 converts the boost voltage of C88 the provide three isolated low voltage secondaries and also the secondary auxiliary voltages TX2 leakage energy is returned to the high voltage supply rail via D2 D3 and D4 D5 The turnoff voltage rise is controlled by loss less snubber network C27 C28 061 063 069 110
41. became surface mount changing from pcb part no 35555 2600 to 35555 4360 and the 3 3V 5V Output became a separate assembly built on 35555 4580 Version 4 From August 2006 onwards Built using the same Main pcb 35555 4550 but with 1 5V to 5V variable output assembly built on pcb 35555 4790 replacing the switched 3 3V 5V assembly of version 3 At the same time the Control pcb changed to accommodate the 1 5V to 5V control built on pcb 35555 4780 Circuit Descriptions The main board contains all the power sections for the 2 main 35V 4A outputs the 3 3V 5V logic output and the auxiliary supplies for the control measurement and display functions on the front panel Control board Pcb layouts are the same in triple and dual units but pcbs in the triple are additionally populated with the components for the 5V 3 3V output Versions 1 amp 2 or are fitted with a separate 5V 3 3V assembly Version 3 or 1 5V to 5V assembly Version 4 Refer to the Model Changes section for an overview of the four main versions of this PSU Main Pcb Version 1 Component references when output specific are given for Channel A the left hand main output when viewed from the front with Channel B references shown in brackets Where supply rail and signal names are given these will be followed by A B or C on the schematics for Channels A B and C respectively The topology employed is a double ended forward converter with isolated secondary windings for
42. by 50Hz ripple on the supply rail IC7 is now enabled Oscillator and Feed forward PWM IC5A is a 160kHz oscillator D type IC6A produces a squarewave at 80kHz The Q output of the D type is used to provide a negative trigger pulse for the 555 timer IC7 R73 C4 produce a leading edge delay to reduce the duty cycle to about 45 The A output of the D type provides a means of terminating the 555 timer pulse by charging C68 After the 555 timer has been triggered by 021 pin 7 goes high and allows R82 R90 to charge C68 While the HTA rail is below about 250V the voltage on C68 will not have reached the level reguired at IC7 pin 6 to terminate the pulse and a maximum duty cycle pulse is generated when Q19 terminates the pulse As the input mains voltage rises above 185V AC the current through R82 R90 manages to charge C68 to the 555 timer threshold level and terminate the pulse before Q19 does so From this point to maximum mains voltage the pulse width varies inversely with the mains voltage giving a degree of feed forward regulation Gate Drive to the Power MOSFETs The pulse from IC7 pin 3 drives the complimentary emitter followers Q2 which in turn drive the gate drive transformer TX1 The transformer is AC coupled via C16 Operation of the Double ended Forward Converter During the on time both pairs of power MOSFETs 04 05 and Q6 Q7 are turned on by the gate drive transformer TX1 Local decoupling of the HT supply is
43. by C14 and L12 When the MOSFETs are turned off the energy in the leakage and magnetising inductances is returned to the HT rail D2 D3 and 04 05 The snubber components C101 C17 R118 R119 and D8 control the rate of rise of voltage across the transformer at switch off The current in the power stage is monitored by R16 When this current becomes excessive under fault conditions the latch Q22 Q23 is fired removing gate drive to the MOSFETs and discharging the local power rail via R122 Power to the primary control circuit is obtained from a power back winding on the transformer and components D6 D7 L3 C15 D39 isolates the power back circuit from C94 during initial start up Main Outputs The voltage on the secondary winding is rectified and filtered and fed to a linear regulator To minimise power dissipation in the linear stage the voltage across it is maintained at about 1V by means of amagamp Linear regulation is performed by MOSFET Q14 Q15 which receives gate drive from the control pcb via pin 2 of PJ1 PJ2 The voltage across Q14 Q15 is monitored by Q11 Q12 which generates reset current to the MA1 MA2 whenever the voltage across Q14 015 forward biases the base emitter junction of Q11 Q12 D24 D26 is the main rectifier and flywheel diode The rectified pulse is filtered by L6 17 and C37 Q8 Q9 minimises parasitic reset of the magamp by bypassing it during the flyback period D44 D45 R
44. each output which are regulated by means of a magamp pre regulator followed by a MOSFET linear regulator Mains Input Filtering and Rectification The AC input is direct via a pcb mounted IEC inlet connector X capacitors C1 C9 C5 Y capacitors C6 C7 and common mode inductors L1 L2 comprise an input filter which ensures that the supply meets both conducted emission and conducted immunity requirements VDR1 clips mains spikes for component protection R1 provides safety discharge for C1 C5 and C9 Pcb mounted fuse FS1 limits damage on switchmode failure the front panel mains switch is connected via PJ4 RT1 reduces the mains inrush when the unit is turned on from cold is a bridge rectifier and C13 the reservoir capacitor for the high voltage rail HT the circuit is only configured for 230V operation R113 provides safety discharge for C13 C11 and C12 by pass noise signals and help to snub reverse recovery transients in the bridge rectifier Startup Circuit When AC power is applied C94 charges via R60 and R98 and pin 1 of IC1 is low IC1 pin 7 is also low keeping the 555 timer IC7 in a reset condition When the voltage on C94 reaches about 29V IC1 pin 1 goes high via R3 LM393 has an open collector o p and a regulated voltage of about 17V appears at Q1 emitter R5 is no longer in parallel with R4 thus providing positive feedback during the switching transition and sufficient hysteresis to prevent IC1A being switched
45. i Proc pares ung see POP 2 m M n A wow 9 E E e e 109 0 4 ICi 8 4 14 BON 1c2 LED 1 5 4069 4059 EEE D38 03 7 TXI C 487 R69 ImH LE SKIC2 8 a R119 22R 78050 LM358N ae ICI D 4069 ZTX751 gt TX2 B H D 74 R124 039 D78 55 037 DAZ mm ZN vr 53BR 4659 N4007 RIg IN R21 car 187 D19 Efe 21673 2 cas 15 lt 8 73 UVL IN 7 82 228 wu 4700 Saon 63V IC7 A T 4148 REN KS 27 5av 25V PE 3 Pavtxoav 8 4913 Nm 22R GIB 4 IKV 83V W ICI F 5 R52 ASI D59 g HT 4 08 2 5 4069 IgGK ce A 4 4 4 LM35BN E I 18V 2 5 2 D20 C24 BC546 GND D o 05 ya 13 F Oe 747 E 3 aaa vee ane a 35 SVI AUXA OV AUXA UVA 4 4 2 2 7 22gP 1 7 C 4013 758 3 758 IN414B 1 Wi wa i ay Ve Ve 100 ICI G 4069 R 5 GND 20 R54 497 R25 IK gWB AUXA 5V AUXB 15V POVTXDRV E2 RB2 4 7 TX2 1 C MEY BAV2I 470R PBVTXDRV CHASSIS FBB R24 122 zw AUXB 5V R43 I e cua ae I 1c7 8 Rai e Ja Ia BYV27 L5 1ggN 8 ImH PgvTXDRv 8 4213 V R70 63V 1 3 SKIF3 BVTXD I 22R 479K TX2 D 228 4178850 4 p43 075 3 5 13 100K 3 C73 C25 IB N 5 13 1 C45 5V ll 2 1 nza cas Pas m 021 100 4700 2 on 53V 12 o MI I 337
46. in the primary side circuitry which lies in a clearly defined area at the rear of the main printed circuit boards 1 Remove the 6 side screws and front handle screw to release the top cover 2 Unplug the connector assemblies linking the main pcb to the front panel control pcb noting their orientation brown wire to pin 1 corner marker 3 Unplug the mains connection at the rear of the pcb and remove the chassis safety earth connection 4 Undo the 10 screws which secure the main pcb support pillars to the chassis i e the screws accessible underneath the chassis and lift out the pcb with its mounting pillars attached On versions 3 amp 4 see below the separate 3V 5V or 1 5V 5V variable sections can then be removed if necessary 5 To remove the control pcb on the front panel first remove the main pcb Pull off the 6 control knobs then undo the 5 screws which retain the pcb to the moulding and the 4 screws or nuts 6 on EX354T which connect the pcb to the output terminals note that the latter fixings are 4BA screws as marked on the pcb adjacent to each screw prior to the introduction of safety terminals at Version 4 which used M4 nuts The control pcb can then be lifted clear 6 Reassemble in the reverse order taking great care to ensure that all connections are exactly as before dismantling and that no insulation creepage and clearance distances have been compromised Ensure that only the correct fastenings have been used otherwi
47. o 016 PE O T C3 3H 16 1 F52 Dig se I 5 CHASSIS d H 1B V a Hiw 55 cia 253 l 1 psa a HE 5A 6v8 rl ee d skos 981 SENSE C 889 22k C86 190v BAV21 D57 3 BYV26C Cl02 5 224 e D29 15V Ii4 W4 JEDE 22K Js 00 05 0922 R3 IN NB Cuz BAV21 Pav IBON 5 SFHEISA 3 53V IRFP J 2W5 22K 4148 ap Na D35 DIT gav 1ggN ts 53V 013 f RB7 C46 ee 460 wir 4 lave IN aR RS 2N2 RII8 PE fay HB PE TEE 4 R39 wa 4148 4 7 C48 R72 PE 15V 100 Pav Pav 19 TX2 G L 2205 358 4 2N2 Hz RB 3K3 RIZ us zw 35 4 3 2 E lt 028 s e B 478R 3K3 cag c63 PgVPFC D17 R33 75 En s BF ng 2 Pav 470P RI2 02 A BAV JPTE 274R IN 422 iK 1 5 wav ee 27 ZTX N 21 C7B FEY op Er 651 an Pav G2A 4148 p75 1900 243 V 213 x st 4 BON E m 4012 2W MR 52 M 2 37 7 2 PE i 3 N R117 5VB 5064 1 R123 Di FL R34 270 QWE ange IN RIIS 2K2 VREFT PBV 0N 470R AX12A 2W MR 4 Aal J ECT CB Ec IBav PE 1 TX1 A gt TXI B _ e V VC SVET TEEN 470P a NOT FITTED ON 44115 1238 EX354D RIBS 5ENSE C 47 CS gt 1BK C50 Il IDaN PgVTXDRV POVTXDRV R7 Ya v 109 Ms 628 EE K RIB4 R5 83V A 4R7 R55 AUXA 15V 1gR 1C1 C 3K3 PE 25 DIB BAV21 1 470A t T 5
48. of the maximum rms input voltage This is achieved by storing energy in L3 when Q5 is conducting and transferring it to C88 via boost diode D54 when Q5 is turned off When Q5 next turns on D54 is still conducting current To prevent large switch on losses in Q5 a delay inductor L9 is placed in series with Q5 This ensures that the current in the boost diode D54 is reduced at a gradual rate and the reverse recovery time is minimised at the same time as Q5 drain voltage is allowed to fall rapidly The energy stored in L9 is transferred to C119 via D67 and dissipated in R92 and R95 Snubber network C121 R90 D50 reduces switch off losses in Q5 11 Oscillator and Forward Converter IC1 A B C is a 160kHz oscillator D type IC7 A produces a square wave at 80kHz The square wave at O output of IC7 A is processed by R9 099 C68 and IC1 D to give a pulse of about 45 duty The output from IC1 D is buffered by IC1 E and IC1 F to drive the complimentary emitter followers Q2 Q3 which in turn drive the gate drive transformer TX1 is ac coupled via C16 and its parallel diode D1 15V supply for the CMOS ICs IC1 IC7 is derived from the primary auxiliary rail via 3 terminal regulator IC4 R105 in series with the primary winding of TX1 is used to control the switching speed of the MOSFETs R10 R10a in parallel with TX1 primary dampen any ringing A dual ended forward converter comprising of Q4 Q7 and TX2 converts the boost voltage of C88 the
49. provide three isolated low voltage secondaries and also the secondary auxiliary voltages TX2 leakage energy is returned to the high voltage supply rail via D2 D3 and D4 D5 The turn off voltage rise is controlled by loss less snubber network C27 C28 061 063 069 L10 R20 dampens any oscillation across L10 The current in the forward converter is monitored by R16 and if excessive activates latch Q22 Q23 to provide a pulse by pulse current limit While providing a pulse by pulse current limit the latch Q22 Q23 also charges C57 which after a short delay causes Q24 to conduct and trigger SC1 the subsequent trip restart action limiting the temperature rise 04 07 and TX2 Main outputs The voltage on the secondary winding is rectified and L C filtered and fed to a linear regulator To minimise power dissipation in the linear regulating element the voltage across it is maintained at about 1V by means of amagamp Referring to output A the linear regulation is performed by MOSFET Q14 which receives gate drive from the front panel Control pcb The voltage across Q14 is monitored by Q11 which generates reset current to the magamp MA1 whenever the voltage across drain source of Q14 forward biases the base emitter junction of Q11 D24 is the main rectifier and flywheel diode The rectified pulse is filtered by L6 and C33 D44 R111 and C76 generate a negative rail and via R63 sink the base bias current of Q11 which would otherw
50. the left hand output All adjustments are on the front panel control board unless otherwise stated Allow 5 minute warm up before commencing calibration VR110 O O vr10 VR4 VR104 VR OS VR5 VR107 O VRZ O VR3 yno VR109 VR108 O VR106 Control pcb calibration points viewed from rear Eguipment Reguired 5 digit multimeter with better than 0 05 accuracy on dc volts and better than 0 1 accuracy on dc current to 5A alternatively use a precision shunt for current measurement Rheostat or other high power load arrangement to provide up to 5A load at 35V Voltage Calibration Connect the DMM set to volts 0 across the output Set voltage and current controls to minimum Switch output ON Check LED is on and check for a reading of 00 0V 0 1V on the Volts display and DMM check the Amps display reads 0 00 0 01A Set voltage and current controls to maximum Adjust VR5 VR105 maximum output volts for a reading of 35 16V to 35 24V on the DMM Adjust VR6 VR106 measured output volts until the Volts display matches the reading on the external DMM Switch output OFF Adjust VR10 110 preset volts until the Volts display shows 35 2 Current Calibration 16 Switch output OFF Set output voltage to nominally 2V Set current control to minimum Connect the DMM set to Amps and load in series across the output Switch output ON Adjust VR8 108 offset compensation of current contr
51. the Main board and connected to it via a soldered header marked PJ6 on the Main PJ1 on the 5V 3 3V board This works in an identical fashion to the main outputs with the exception that the output voltage control and current limit functions are performed by opamp IC5 This output is fused in case of a failure in the current limit circuit Variable 1 5V to 5V output Version 4 In Version 4 the 3 output is further changed to offer a variable 1 5V to 5V AUX output in conjunction with minor changes to the Control board described under Version 4 Control in the following section The AUX output is connected to the Main board via the same soldered header as for Version 3 PJ6 on the Main PJ1 on the AUX board Connection to the Control board is via an 8 way connector PJ5 and 2 way connector PJ5A Operation is essentially the same as for the main outputs with the exception that the output voltage control and current limit functions are performed by opamp IC5 VR11 on the Control board see Sheet 1 of Version 4 sets the output voltage The voltmeter of the right hand main output Channel B is used to measure the AUX output via an isolation circuit Opto isolator IC4 contains one LED and two matched photodiodes One photodiode is placed in the feedback path of IC2A to linearise the output from the photodiodes The other photodiode is connected via PJ5A to R63 R64 on the Control board and the right hand voltmeter measures the voltage across R
52. 0 27161 2030 27227 0520 27227 0530 27239 5740 27250 2150 28502 1000 35555 4360 34 Description RES SM0805 4K70F W1 RES SM0805 8K20F W1 RES SM0805 10KOF W1 RES SM0805 11KOF W1 RES SM0805 12KOF W1 RES SM0805 15KOF W1 RES SM0805 27KOF W1 RES SM0805 33K0F W1 RES SM0805 56KOF W1 RES SM0805 75KOF W1 RES SM0805 220KF W1 RES SM0805 470KF W1 RES SM0805 1MOOF W1 RES SM0805 10MOF W1 RES SM0805 10KOD W1 25PPM RES SM0805 11KOD W1 25PPM CAP SM0805 220P CER COG CAP SM0805 47P CER COG CAP SM0805 470P CER COG CAP SM0805 100NZ 50V Y5V DIO SM LL4148 SWITCHING TRAN SM PNP BC859C TRAN SM NPN BC849C IC SM LM324M OP AMP IC SM LF347M BIFET OP AMP IC SM V REF ZRC250 2 5V 2 IC SM 4052 IC SM 4053 IC SM 74HC574 IC SM PIC16C55A 04 SO RESONATOR SM CSTCR4M00G53 RO PCB CONTROL EX354D T Position R38 39 R138 139 R18 R118 R24 R41 R44 R124 R141 R144 R51 R151 R35 R135 R33 R133 R27 R127 R6 8 R106 108 R31 R131 R3 R103 R36 37 R136 137 R29 R42 R129 R142 R19 R119 R13 R26 R113 R126 R4 5 R14 15 R17 R30 R32 R43 R104 105 R114 115 R117 R130 R132 R143 R28 R128 C19 C24 C119 C124 C15 C17 C29 C42 C68 C115 C117 C129 C43 C143 C6 C27 28 C35 C106 C127 128 C135 D1 5 D7 9 D101 105 D107 109 Q1 Q101 Q2 Q102 IC7 107 IC5 IC105 D6 D106 IC4 104 C2 1C102 IC6 IC106 IC3 103 XTL1 XTL101 ASSEMBLY CONTROL EX354 Version 4 44115 3
53. 07 Description RES 27KOF W60 50PPM RES 33KOF W60 50PPM RES 56KOF W60 MF 50PPM RES 75KOF W60 MF 50PPM RES 180KF W60 MF 50PPM RES 220KF W60 MF 50PPM RES 470KF W60 MF 50PPM RES 1MOOF W60 MF 50PPM RES 10MOF W60 MF 50PPM RES NETWK SIL 1 4 RES NETWK SIL 56R X 4 RES R10 FERRYALLOY POT 10K LIN SPLINE SHAFT 25MM POT 10K LOG SPLINE SHAFT 25MM RES PS H 2K2 CF 10MM RES PS H 4K7 CF 10MM RES PS H 100K CF 10MM RES PS H 100R CERMET 10MM SKEL CAP 10NZ 1KV CER D10 P5 22PJ 100V NPO P5 CAP 47PG 63V CER N150 P5 220PG 100V N750 P5T CAP 470 100 MED K P2 5 CAP 2U2 63V ELEC RC2 P1 5 47U 10V ELEC RC2 P2 100 100V 50V ELEC P2 CAP 10U 35V ELEC RE2 P2 CAP 220U 10V ELEC RE2 P2 5 CAP 100U 25V ELEC LOW ESR P2 5 CAP 100U 50V LOW ESR P3 5 CAP 100NK 63V P E P5 220NK 63V P E 5 330NK 63V 5 100NK 400V 368 SER P15 CAP 10NK 100V P E P5 Position R27 127 R6 7 8 106 107 108 R31 131 R3 103 R1 101 R36 37 42 136 137 142 R29 129 R19 119 R13 26 113 126 RP3 103 RP1 2 101 102 R21 121 VR1 2 101 102 VR3 103 VR4 6 9 10 104 106 109 110 VR5 105 VR8 108 VRT 107 C30 34 130 C4 5 104 105 C15 17 29 42 115 117 129 142 C19 24 119 124 C43 143 C16 116 C7 107 C18 23 118 123 C25 26 125 126 C21 121 C138 C20 120 6 8 9 12 27 28 31 33 103 106
54. 1 33331 48601 33331 4880 33331 48701 33331 48901 33533 0370 33536 4090 33536 4220 37151 0470 48511 03101 Description NUT 4 ZPST CAPTIVE NUT SPIRE NO 6 SCREW M3 X 16 PNHDPZ ZPST SCREW M3 X 6 PNHDPZ ZPST SCREW M4 X 12 TAMPERPROOF WASHER NYLON M2 5 CABLE TIE 75 X 2 5MM SPACER 3 7 ID X 3 2 L NYL SPACER 4BA X 9 53 NPBR FOOT RUBBER BLACK FERRITE SLEEVE APPROX 7 14 15L SWITCH ROCKER DPST GREY 12 PUSHBUTTON BLACK MAINS LD 2M ST IEC SKT UK PL MAINS LD 2M ST IEC SKT EURO PL TERMINAL TP 2 RED GREY 12 TERMINAL TP 2 BLACK GREY 12 TERMINAL TP 2 GREY GREY 12 WASHER ALUMINIUM FOR 2 TERM SKT 7W 156 20AWG YELLOW SKT 9W 156 20AWG YELLOW HANDLE EC254 OZ BLACK NICK BRACKET F PANEL EL EX D T BRACKET HANDLE SUPPORT OBSOLETE BRACKET HANDLE SUPPORT UNIVERSAL FRONT MOULDING OVERLAY NAME amp LOGO OVERLAY NAME amp LOGO OVERLAY TERMINAL AREA OVERLAY TERMINAL AREA OVERLAY DISPLAY WINDOW CHASSIS COVER KNOB INSTRUCTION BOOK Position EARTH COVER TO CHASSIS HANDLE TO COVER HANDLE TO L BRACKET MAIN PCB SPACERS EARTH CONTROL PCB MAINS HARNESS TO CHASSIS FOR TERMINALS TERMINALS TO PCB OUTPUT A OUTPUT OUTPUT C MAINS SWITCH FOR UK FOR EUROPE EARTH TERMINAL MAIN TO CONTROL 5 O P MAIN TO CONTROL MAIN O Ps EX354T ONLY EX354D ONLY EX354T ONLY EX354D ONLY 41 MECHANICAL PARTS CHANGES FOR EX354Tv and revised EX354D grey ON OFF buttons 23377 7010 3151
55. 10 111 R30 33 99 100 102 103 R125 R76 83 R16 R20 VR1 VDR1 23 PCB ASSEMBLY EX354T Version 2 44115 1210 continued Part Number 23386 0060 23424 0443 23424 0459 23424 0466 23424 0468 23424 0469 23424 0472 23427 0388 23427 0389 23427 9211 23557 0610 23557 0661 23557 0663 23557 0673 23557 0693 23557 0816 23557 0818 23557 0820 23557 0822 23557 0950 23620 0236 23620 0246 23620 0247 23620 0252 23620 0264 23620 0268 23620 9007 23621 0314 23684 0016 23684 0020 23685 0013 25021 0901 25021 0910 25031 0060 25031 0080 24 Description THERMISTOR INRUSH LIMIT 6A UL CAP 10NZ 1KV CER D10 P5 CAP 4N7 250V AC CER Y UL SP 1NOK 1KV 5 470 1 5 220 1 5 2N2K 1KV P5 P7 5 CAP 220PK 100V CER P2 5 2N2K 100 MED P2 5 470 100 P2 5 1000 50V ELEC P3 5 4700 25V ELEC P5 2200 63V ELEC P5 22U 35V ELEC P2 212 160V ELEC P2 5 CAP 1000U 50V ELEC RSH P7 5 2U2 50V ELEC LOW ESR P2 10U 50V ELEC LOW ESR P2 1000U 10V ELEC LOW ESR 5 CAP 470U 400V ELEC S I P10 1NOK 100V P E P5 CAP 100NK 63V P E P5 CAP 220NK 63V P E P5 CAP 2N2K 63V P E P5 CAP 100NK 400V P E 368 SER P15 CAP 220NK 400V P E 468 SER P15 CAP 10NK 100V P E P5 CAP 1UOK 400V P E P27 5 CAP 220NM 250VAC 2 P22 5 UL CAP 1UM 250
56. 108 VRT VR107 C30 C34 C130 C18 C23 C118 C123 C21 C121 C7 C107 C16 C37 C116 C137 C25 26 C125 126 C20 C22 C120 C122 C138 C3 C8 9 C12 C31 C33 C103 C108 109 C112 C131 C1 C101 C10 11 C110 111 C36 C136 C13 14 C113 114 C2 C102 LED1 2 LED101 102 103 DISP 1 2 DISP101 102 D10 D110 IC1 1C101 PCB ASSEMBLY CONTROL EX354 Version 3 SM Stage 44115 3011 Part Number 23105 0000 23105 0100 23105 0220 23105 0560 23105 1100 23105 1220 23105 1470 23105 1680 23105 2100 23105 2240 23105 2360 23105 2390 Description RES SM0805 ZERO OHM RES SM0805 10R0F W1 RES SM0805 22ROF W1 RES SM0805 56ROF W1 RES SM0805 100RF W1 RES SM0805 220RF W1 RES SM0805 470RF W1 RES SM0805 680RF W1 RES SM0805 1KOOF W1 RES SM0805 2K40F W1 RES SM0805 3K60F W1 RES SM0805 3K90F W1 Position R9 R16 R20 R109 R116 R120 R50 R150 R25 R125 R53 60 R153 160 R40 R140 R10 R110 R45 R145 R2 R102 R11 12 R23 R48 R70 73 R111 112 R123 R148 R170 173 R35A R135A R47 R147 R34 R46 R134 R146 33 PCB ASSEMBLY CONTROL EX354 Version 3 SM Stage 44115 3011 continued Part Number 23105 2470 23105 2820 23105 3100 23105 3110 23105 3120 23105 3150 23105 3270 23105 3330 23105 3560 23105 3750 23105 4220 23105 4470 23105 5100 23105 6100 23106 3100 23106 3110 23405 0221 23405 0470 23405 0471 23461 0020 25021 0010 25340 1000 25377 1000 27106 1160 27106 146
57. 111 R110 and C76 C77 generate a negative rail to sink the base bias current of Q11 Q12 which would otherwise cause the output to remain slightly positive when 0V was set from the control board In the event of a fault where control of the magamp is lost and the voltage across the filter capacitor C33 C37 rises above 40V the crowbar circuit D57 D58 R99 R102 R123 D59 D60 R100 R103 R124 fires and causes the primary current limit to interrupt gate drive to the primary MOSFETs Q4 Q5 Q7 and to discharge the primary control power rail This is followed by a normal reset if the fault persists the entire PSU is disabled Fixed 5V 3 3V Output The linear regulation using MOSFET Q16 and magamp pre regulation using MA3 and associated components work exactly as described above for the main outputs with the exception that D62 sets the crowbar trip voltage to approximately 7 5V When the crowbar fires fuse FS2 is blown and must be replaced once the fault has been removed to restore operation The control circuit for this output is also on the main board IC4A provides voltage control its output is buffered by Q17 which provides gate drive to Q16 D46 VR1 and associated components provide the 3 3V reference at IC4A pin 2 With selector switch SW3 on the control pcb set to 3 3V R53 is open circuit and IC4A pin 3 sees the full output voltage SENSE C via R49 with SW3 set to 5V R49 and R53 form a potential divider across the output s
58. 120 Parts shown in bold are removed on EX354D Version 4 Part Number 20661 0851 20661 0870 20661 0871 22219 0500 22225 0220 22573 0048 22573 0208 22573 0209 22573 0247 23202 1330 23202 4180 23320 0003 23347 0330 23347 0340 23377 2220 23377 2470 23377 3221 23377 4100 23379 1100 23424 0443 23557 0500 23557 0512 23557 0513 23557 0612 23557 0647 23557 0825 23620 0246 23620 0247 23620 0249 23620 0264 23620 9007 23685 0007 25061 0201 25061 0519 25117 0020 44115 3121 Description SPACER 56 IN 7 SEG LED 3 5H SPACER TOWER RND 4 80Dx9L BLK SPACER TOWER RND4 80Dx12L BLK SWITCH 2 POLE MOMENTARY SWITCH PUSH PUSH SPPH11470B HEADER 3WAY STR SIL STD GOLD HEADER 8 WAY STRAIGHT 156P HEADER 9 WAY STRAIGHT 156P HEADER 2 WAY STR 1P F LOCK RES 330RF W60 MF 50PPM RES 180KF W60 MF 50PPM RES R10 FERRYALLOY POT 10K LIN SPLINESHAFT 25MM POT 10K LOG SPLINESHAFT 25MM RES PS H 2K2 CF 10MM RES PS H 4K7 CF 10MM RES PS H 22K CF 10MM HEX ADJ RES PS H 100K CF 10MM RES PS H 100R CERM 10MM SKEL CAP 10NZ 1KV CER D10 P5 CAP 1U0 50V ELEC RC2 P1 5 CAP 220U 10V ELEC 7MM P2 5 CAP 10U 35V ELEC 7MM P2 CAP 1U0 100V 50V ELEC P2 CAP 10U 35V ELEC RE2 P2 CAP 100U 50V LOW ESR P3 5 CAP 100NK 63V P E 5 CAP 220NK 63V P E P5 CAP 330NK 63V P E P5 CAP 100NK400VP E 368 SER P15 CAP 10NK 100V P E P5 CAP 100NK 250V P P MKP4 P10 LED T1 R ND 3mm RED DISPLAY 3 DIG 56LED 9MM LEG DIO 1N5401 PCB ASSY SM CNTL EX354TV
59. 121 R105 R127 R13 R67 70 R120 R122 R44 R106 R10 R10A R93A R84 R85 R89 R2 R112 R123 R112A R14 R9 R8 R72 R5 R41 59 65 66 65A R66A 86 R93 R35 R73 R98 R12 R71 R6 R36 R48 52 R57 R78 R133 R138 R74 75 R74A R75A R47 R135 136 R135A R136A R131 132 R131A R81 82 R81A R82A R53 C101 C2 C13 C24 C26 C31 C35 C41 42 44 45 C61 62 C69 C74 75 80 81 87 92 102 107 110 115 117 120 69 82 86 48 90 91 013 16 030 31 037 41 046 D53 056 57 068 077 29 PCB ASSEMBLY MAIN EX354 Versions 3 amp 4 SM Stage 44115 3041 Part Number 25132 0010 25132 0230 25132 0290 25132 0300 25340 1000 25377 1000 27227 0130 27227 0690 35555 4550 Description DIO SM ZEN 5V6 W5 DIO SM ZEN 5V1 W35 DIO SM ZEN 18V W35 DIO SM ZEN 22V W35 TRAN SM PNP BC859C TRAN SM NPN BC849C IC SM 4013 IC SM 4069 PCB MAIN Position D55 D65 D20 D23 D33 34 D59 D66 Q23 24 Q1 022 IC7 ASSEMBLY CONTROL EX354T Versions 1 amp 2 44115 0860 Parts not fitted on PCB ASSY CONTROL EX354D Versions 1 amp 2 44115 0880 shown in bold Part Number 20661 0851 22218 0213 22225 0220 22573 0207 22573 0209 22574 0122 23202 0100 23202 0220 23202 1100 23202 1220 23202 1330 23202 1470 23202 1680 23202 2100 23202 2360 23202 2390 23202 2470 23202 2499 23202 2820 23202 3100 23202 3110 23202 3143 23202 3150 30 Descr
60. 17 37 38 39 110 111 112 R79 80 R99 100 101 R16 R44A 44B R123 124 R120 VR1 VDR1 RT1 C6 7 11 12 C82 83 84 85 92 93 101 19 PCB ASSEMBLY MAIN EX354T Version 1 44115 0850 continued Part Number 23424 0468 23427 0388 23427 9211 23428 1100 23557 0661 23557 0663 23557 0678 23557 0816 23557 0818 23557 0820 23557 0822 23557 0950 23620 0246 23620 0252 23620 0264 23620 9007 23621 0314 23646 0017 23684 0010 23685 0013 25021 0901 25021 0910 25031 0060 25031 0080 25031 0100 25031 0110 25031 0120 25115 0910 25130 0207 25130 0229 25130 0245 25130 0903 25130 0913 25130 0914 20 Description CAP 470PK 1KV CER P5 CAP 220PK 100V CER P2 5 CAP 470PK 100V CER MED K P2 5 CAP 100PG 100V CER NPO P2 5 CAP 470U 25V ELEC RE2 P5 CAP 220U 63V ELEC RE2 P5 CAP 22U 50V ELEC RE2 P2 CAP 1000U 50V ELEC RSH P7 5 CAP 2U2 50V ELEC LOW ESR P2 CAP 10U 50V ELEC LOW ESR P2 1000U 10V ELEC LOW ESR P5 4700 385 400V ELEC S I P10 100NK 63V P E P5 CAP 2N2K 63V P E 95 CAP 100NK 400V P E 368 SER P15 CAP 10NK 100V P E P5 CAP 1U 400V P E P27 5 CAP 1NOF 63V P S EXFS HR CAP 470NK 250VAC 2 P P P27 5 CAP 330NK 160V P15 DIO 1N4148 B R DIO BAV21 DIO BYV27 DIO BYV32E DIO BAX12A DIO BYV26C DIO BYM26C DIO 1N4007 B R DIO ZEN 15V W4 DIO ZEN 5V6 W4 DIO ZEN 36V W4 DIO ZEN 5V1 W4 DIO ZEN 6V8 W4 DIO ZEN 39V W4 Position 20 21 58 59 22 C68 C4 C10 87 C23 25
61. 2 0990 33147 0300 33331 8900 33331 8910 33331 8930 37113 2110 48511 0970 SPINDLE BRACKET FRONT PANEL FRONT MOULDING OVERLAY NAME amp LOGO OVERLAY TERMINAL AREA OVERLAY TERMINAL AREA EX354D PUSH BUTTON GREY 6 5 DIAMETER INSTRUCTION BOOK EX354D Tv For AUX Vser Replaces 31512 0680 Replaces 33147 0120 EX354Tv only EX354Tv only Replaces 33331 4890 Replaces 22225 0222 Replaces 48511 0310 MECHANICAL PARTS CHANGES for SAFETY TERMINALS from mid 2006 22571 1080 22571 1090 22571 1100 22571 1101 20661 0295 20037 0271 20037 0304 20030 0266 20210 0110 42 TERMINAL PSU SAFETY RED GREY TERMINAL PSU SAFETY BLACK GREY TERMINAL PSU SAFETY GREY GREY WASHER ALUMINIUM SAFETY TERMINALS SPACER HEX M4 x 8 WASHER M4 x 12 WASHER M4 SHAKEPROOF WASHER M4 PLAIN NUT M4 BARBED YELLOW PLASTIC COLLAR FOR RED BLACK TERMINALS ONLY M4 x 812 WASHER 20030 0271 M4 SHAKEPROOF 20037 0304 HEX SPACER M4x8 20661 0295 NUT M4 BARBED 20210 0110 replaces 22571 0675 replaces 22571 0685 replaces 22571 0696 replaces 22571 0691 replaces 20661 0278 replaces 4BA fasteners see diagrams replaces 4BA fasteners see diagrams replaces 4BA fasteners see diagrams replaces 4BA fasteners see diagrams ALUMINIUM COLLAR 22571 1101 FOR GREY EARTH TERMINAL ONLY M4 x 12 WASHER 20030 0271 STD M4 WASHER 20030 0266 M4 SHAKEPROOF 20037 0304 NUT M4 BARBED 20210 0110 HEX SPACER M4x8 20661 0295 Component Layouts M
62. 20 CLIP ON 29DEG W HEATSINK PCB MTG 3 7DEG C W CLIP FOR 20670 0400 HEATSINK BOLT ON 7DEG C W BEAD DOUBLE FERRITE TRANSFORMER GATE DRIVE EX TRANSFORMER HF PWR EX354 UL CHOKE 1mH AXIAL 1 3 OHMS CHOKE 1 8mH 6A COMMON MODE UL INDUCTOR BOOST EX SERIES UL CHOKE 1mH EF16 EX CHOKE 140uH AT 4A EF25 EX MAGAMP 35V 4A EX354 CHOKE 3 6uH EF16 EX FUSE CLIPS PCB MTG FUSE 10AANTISURGE T HBC UL FUSE 5 0AT SUBMIN PCB MTG UL TAB 4 8MAX 0 8MM STR PCB MTG AC RECEP 10AMP R A SOLDER UL HEADER 2WAY STR SIL STD GOLD HEADER 6 WAY STRAIGHT 156P HEADER 9 WAY STRAIGHT 156P Position SPACERS FOR BR1 SPACERS TO UNDERSIDE OF PCB SPACERS FOR BR1 FOR BR1 FOR BR1 FOR PCB SPACERS FOR SKD24 SKD26 SKD54 SKQ4 SKQ7 SKQ14 15 FOR SKQ5 PCB MAIN 5V PCB FOR SKD24 SKD26 SKD54 SKQ4 SKQ7 SKQ14 15 SKD24 SKD26 SKD54 SKQ4 SKQ7 SKQ14 15 SKIC2 3 SKQ5 FOR SKQ5 SKBR1 FB1 5 FB8 TX1 TX2 L4 5 L1 2 L3 L10 L6 7 MA1 2 L9 FS1 FOR FS1 FS3 5 H40 43 PJ3 TP1 2 PJ6 BREAK IN HALF PJ1 2 PCB ASSEMBLY EX354 Versions 3 amp 4 44115 3040 continued Part Number 23185 0000 23202 0220 23202 3100 23202 2100 23202 2220 23202 5680 23207 3330 23209 4220 23210 0470 23210 1100 23210 1470 23210 3330 23210 3390 23222 0047 23222 0100 23222 0220 23222 0470 23222 1220 23271 0020 23274 0005 23274 0310 23386 0010 23386 0060 23424 0443 23424 0459 23424 0468 23424 0469 23424 04
63. 3330 23209 4220 23210 0470 23210 1100 23210 1470 23210 3330 23210 3390 23222 0047 23222 0100 23222 0220 23222 1220 23222 2220 23271 0020 23274 0005 23274 0310 23377 2220 23386 0010 Description RES 2K70F W60 MF 50PPM RES 3K30F W60 MF 50PPM RES 3K90F W60 50PPM RES 4K70F W60 MF 50PPM RES 10KOF W60 50PPM RES 11KOF W60 50PPM RES 22KOF W60 MF 50PPM RES 27KOF W60 MF 50PPM RES 33KOF W60 MF 50PPM RES 43KOF W60 MF 50PPM RES 47KOF W60 MF 50PPM RES 100KF W60 MF 50PPM RES 360KF W60 MF 50PPM RES 390KF W60 MF 50PPM RES 470KF W60 MF 50PPM RES 620KF W60 MF 50PPM RES 820KF W60 MF 50PPM RES 910KF W60 MF 50PPM RES 6M80F W60 MF 50PPM RES 33K0J 1W MF 250PPM RES 220KF W75 MF 100PPM RES 47ROJ 2W 250PPM RES 100RJ 2W MF 250PPM RES 470RJ 2W MF 250PPM RES 33K0J 2W MF 250PPM RES 39K0J 2W MF 250PPM RES 4R70J W33 MF FUSIBLE NFR25 RES 10R0J W33 MF FUSIBLE NFR25 RES 22R0J W33 MF FUSIBLE NRF25 RES 220RJ W33 MF FUSIBLE NFR25 RES 2K20J W33 MF FUSIBLE NFR25 RES 0R047J 2W MR RES 0R22K 2W5 WW RES 10K0J 4W WW RES PS H 2K2 CF 10MM VARISTOR V275LA20A UL Position R9 R8 60 72 R5 R118 R43 45 107 108 114 119 R93 R3 35 65 66 73 88 98 R12 R71 R116 R6 18 19 R36 48 52 57 78 R133 R74 75 R53 R131 132 135 136 R81 R82 R96 97 128 130 134 137 R63 64 R1 113 R27 28 31 R90 129 R56 62 92 95 R79 80 R39 94 R4 7 21 22 23 24 54 R61 R17 1
64. 5 1230 shown in bold Part Number 20030 0263 20037 0301 20038 9501 20210 0101 20234 0011 20234 0027 20613 0007 20613 0018 20661 0225 20670 0135 20670 0300 Description WASHER M3 ZPST WASHER SHK PROOF ZPST WASHER M3 SPRING NUT M3 ZPST SCREW M3 x 10 PNHDPZ ZPST SCREW M3 x 6 PNHDPZ ZPST SIL PAD TO220 PLAIN SIL PAD TO 3P 247 PLAIN SPACER HEX M3 x 12 NPBR CLIP GPO2 FOR PCB MTG H SINKS HEATSINK PCB MTG 63MM PLAIN Position SPACERS FOR BR1 SPACERS TO UNDERSIDE OF PCB SPACERS FOR BR1 FOR BR1 FOR BR1 SPACERS SKD24 SKD26 SKD28 SKD54 SKQ4 SKQ7 SKQ14 16 SKQ5 PCB SKD24 SKD26 SKD28 SKD54 SKQ4 SKO7 SKQ14 16 SKD24 SKD26 SKD28 SKD54 SKQ4 SKQ7 SKQ14 16 21 PCB ASSEMBLY MAIN EX354T Version 2 44115 1210 continued Part Number 20670 0340 20670 0400 20670 0401 20670 0410 22040 0940 22109 0130 22109 0210 22154 0160 22154 0230 22154 0240 22154 0460 22154 0470 22154 0500 22154 0510 22154 0600 22154 0610 22312 0242 22315 0248 22315 0460 22455 0040 22520 0190 22573 0041 22573 0207 22573 0209 23202 0100 23202 0220 23202 0330 23202 0470 23202 1100 23202 1220 23202 1270 23202 1330 23202 1470 23202 1536 23202 2100 23202 2220 22 Description HEATSINK TO220 CLIP ON 29DEG W HEATSINK PCB MTG 3 7DEG C W CLIP FOR 20670 0400 HEATSINK BOLT ON 7DEG CW BEAD DOUBLE FERRITE TRANSFORMER GATE DRIVE EX TRANSFORMER HF PWR EX354 UL 1mH AX
65. 5401 O H We 3 968496 EHN aii VRIgB sav sav SEG LATB RCB zB BY 33k AUXB BV on voros 2 2 i SEG ENB AGs a A t SEG ENB AUXB 5V RC4 Dias X AUXB 5V RC3 z1 GEG L AT nias LL4148 DIES 114148 ANS vB 2 2a 33K ma Ja RC2 sina 2 vap RCi swe Bass RMI oO icu S 1 10 0 8 2 mas LM324M A e MHE ULN2083 AUXB V BCB5g ap 478 ia PS ala 1 16 DIG 18 5 mm 878 220P ANS 10K IPHIB SENSE B E B6B 12 o 828 2 N 015 28 Reg Mi w 2a 3 838 3 14 DIG 38 Res 858 ANZ PJIB2 A ug T B4B 4 13 015 48 lase RB4 ILIMITA AUXB 15v cov 858 5 12 DIG 5B Rea 13 B3B KN Hs BB 5 215 68 27 828 R146 3K9 4 2 02 p Ores BIB 142 CHass sza 1 E 878 7 a DIG 78 AUXB BV Dabs RBl u a eee VRIg4 907 3 LO pigs 8 s w 2 2 O PFJ122 C 5 AUXB 5V CURRENT 17777 ue CHASSIS AUXB Bv BAS DE INTB VREFB Los me AUXB BV 2 RA wuxi CSTCR G A dads RAG MUXOB 470 7 4 5 LL4148 4 Digs LL414B P1183 AQ SENSEAB ICOMB v AUXB 18v ICOMB AUXB Bv Ci35 o d
66. 60 23206 1270 23206 2100 23206 4220 23206 4270 23206 5680 23207 1470 23207 2220 23207 3330 23209 4220 23210 0470 23222 0047 23222 0220 23222 1100 23222 1220 23274 0005 23274 0020 23274 0130 23274 0200 23377 2220 23386 0010 23386 0030 23424 0459 23424 0466 Description RES 220RF W60 MF 50PPM RES 470RF W60 MF 50PPM RES 536RF W60 MF 50PM RES 1K00F W60 50PPM RES 2K20F W60 MF 50PPM RES 4K70F W60 MF 50PPM RES 10KOF W60 MF 50PPM RES 22KOF W60 MF 50PPM RES 43KOF W25 MF 50PPM RES 100KF W60 MF 50PPM RES 220KF W60 MF 50PPM RES 470KF W60 MF 50PPM RES 560KF W60 MF 50PPM RES 270RF W60 MF 50PPM RES 1K00F W60 MF 50PPM RES 220KF W60 MF 50PPM RES 270KF W60 MF 50PPM RES 6M80F W60 MF 50PPM RES 470RJ 1W MF 250PPM RES 2K20J 1W MF 250PPM RES 33K0J 1W MF 250PPM RES 220KF W75 MF 100PPM RES 47R0J 2W MF 250PPM RES 4R70J W33 MF FUSIBLE RES 22R0J W33 MF FUSIBLE RES 100RJ W33 MF FUSIBLE RES 220RJ W33 MF FUSIBLE RES 0R22K 2W5 WW RES 0R10K 2W5 WW RES 0R1J 4W WW RES 680RJ 7W MF RES PS H 2 2 CF10MM VARISTOR V275LA20A THERMISTOR INRUSH LIMITER 4A CAP 4N7 250V AC CER Y CAP 1NOK 1KV CER P5 Position R74 78 83 84 93 104 R10 85 R59 R73 89 13 47 51 R40 41 72 55 114 42 52 57 108 R50 107 R6 43 45 75 81 46 48 58 109 121 R65 66 71 49 R53 R8 61 R5 R3 R4 R29 32 36 R25 26 R90 R2 82 R96 97 117 R56 62 RQ R60 63 64 98 R1 113 R28 31 35 R7 21 23 24 54 22 33 R
67. 64 when the SHOW AUX PRESET switch SW2A is closed The preset current limit 5 Amps is displayed at the same time by measuring the voltage at the junction of R61 R65 when SW2B is closed Calibration of the voltage measurement is achieved with VR2 on the AUX board 13 Control Board Component references are given for Channel A the left hand channel viewed from the front Channel components are numbered from 100 upwards e g RP3 C9 and R24 on Channel are RP103 C109 and R124 on Channel B The linear regulator is in series with the positive output but because of the way in which the control and metering works it is convenient to consider the regulator output OP as OV and to regard the negative output as the controlled output voltage V Supply rail and signal names on the schematics are followed by or for Channels A and respectively e g OP A From October 2005 the Control board was changed to a mainly surface mount assembly and in August 2006 further minor changes were made with the introduction of the 1 5V to 5V variable AUX output The 3 control variants are described in the Model Changes section page 5 and each have their own Parts Lists Schematics and Component Layouts The following descriptions of the main output control apply equally to all 3 variants however Voltage Control IC7C buffers the voltage control potentiometers VR1 and VR2 VR5 sets the maximum output voltage D6 provides the reference VRE
68. 7 13 IC5 D _IC5 E 4 GND 2 SOS 1 1B B E2 t g 20 SAFETY 12 END SCREEN IK cee R78 021 con 210 220 BE 220 Jan 19 Jen N C 545 023 VREG 4 TX2 H C87 Pav 556 1ggP VREG 17 J R75 10K DS Ic5 IN4148 4069 a 022 13 12 7 14 BC RBS 055 7 546 IK 4148 2 ICS F COB oe GIB 4069 IDON 7 14 R74 RB5 019 470 UN 228 EE 1 4546 4013 ces LKB oy NOT FITTED T FUSIBLE Bat SEU
69. 72 23427 0388 23427 0389 23427 9211 23557 0610 23557 0661 23557 0663 23557 0673 Description RES ZERO OHM RES 22ROF W60 MF 50PPM RES 10KOF W60 50PPM RES 1K00F W60 50PPM RES 2K20F W60 MF 50PPM RES 6M80F W60 50PPM RES 33K0J 1W MF 250PPM RES 220KF W75 MF 100PPM RES 47R0J 2W 250PPM RES 100RJ 2W MF 250PPM RES 470RJ 2W MF 250PPM RES 33K0J 2W MF 250PPM RES 39K0J 2W MF 250PPM RES 4R70J W33 FUSIBLE NFR25 RES 10R0J W33 FUSIBLE NFR25 RES 22R0J W33 MF FUSIBLE NRF25 RES 47R0J W33 FUSIBLE NFR25 RES 220RJ W33 FUSIBLE NFR25 RES 0R047J 2W MR RES 0R22K 2W5 WW RES 10K0J 4W WW VARISTOR V275LA20A UL THERMISTOR INRUSH LIMIT 6A UL CAP 10NZ 1KV CER D10 P5 CAP 4N7 250V AC CER Y UL SP CAP 470PK 1KV P5 220PK 1KV CER P5 CAP 2N2K 1KV CER P5 P7 5 CAP 220PK 100V CER P2 5 CAP 2N2K 100V CER MEDK P2 5 CAP 470PK 100V CER MEDK P2 5 CAP 100U 50V ELEC RE2 P3 5 CAP 470U 25V ELEC RE2 P5 CAP 220U 63V ELEC RE2 P5 22U 35V ELEC P2 Position LK1 2 R37 38 R43 R45 R25 26 R42 R46 R96 97 R130 R134 R63 64 R1 R113 R28 R31 R90 R129 R56 R62 R92 R95 R79 80 R39 R94 R7 R21 24 R54 R61 R17 R110 111 R11 R15 R29 R32 R99 100 R102 103 R83 R16 R20 VDR1 RT1 C5 C6 7 C11 12 C20 21 C58 59 C118 C121 C27 28 C68 C17 C49 C32 C23 C25 C70 7 1 C18 19 C57 27 PCB ASSEMBLY EX354 Versions 3 amp 4 44115 3040 contin
70. 805 10KOF W1 RES SM0805 11KOF W1 RES SM0805 12KOF W1 RES SM0805 15 W1 RES SM0805 27KOF W1 RES SM0805 33KOF W1 RES SM0805 56KOF W1 RES SM0805 75KOF W1 RES SM0805 220KF W1 RES SM0805 470KF W1 RES SM0805 1MOOF W1 RES SM0805 10MOF W1 RES SM0805 10KOD W1 25PPM RES SM0805 11KOD W1 25PPM CAP SM0805 220P CER NPO SM0805 47 CER NPO SM0805 470 SM0805 100NZ 50V Y5V DIO SM LL4148 SWITCHING MM Position R9 10 R16 R20 R109 110 R116 R120 R50 R150 R25 R125 R40 R140 R53 60 R153 R160 R66 R45 R145 R62 R64 R2 R102 R11 12 R23 R48 R70 73 R111 112 R123 R148 R170 173 R52 R135A R35A R47 R147 R34 R46 R134 R146 R38 39 R138 139 R65 R18 R118 R24 R41 R44 R124 R141 R144 R51 R151 R35 R135 R33 R133 R27 R61 R63 R127 R6 8 R106 108 R31 R131 R3 R103 R36 37 R136 137 R29 R42 R129 R142 R19 R119 R13 R26 R113 R126 R4 5 R14 15 R17 R30 R32 R43 R104 105 R114 115 R117 R130 R132 R143 R28 R128 C19 C24 C119 C124 C15 17 29 42 68 115 117 C129 C43 C143 C6 C27 28 C35 C106 C127 128 C135 D1 5 D7 9 D101 105 D107 109 PCB ASSEMBLY CONTROL EX354 Version 4 SM Stage 44115 3121 continued Part Number 25340 1000 25377 1000 27106 1160 27106 1460 27161 2030 27164 1070 27227 0520 27227 0530 27239 5740 27250 2150 28502 1000 35555 4780 Description TRAN SM PNP BC859C TRAN SM NPN BC849C
71. A 7 14 SEG CA HB NA 33k 100K 53 13 SEG BA 1Mg PI 7 12 SEG AA 77 1 CLK 1 ten ch c23 AUXA SV EX 22 Lx ag AUXA 5V 92 uc sw EESEATA n PIC 10K 3 R7 sav AUXA OV RI3 SENSE A 18 55 24 ZA 33K IgM N me Essa 47 AUXA 5v mps EN ill 4 CHASSIS A 21 e 2 DS RCS SEG LATA RB TER 114148 TOCK RCZ 28 m 2 vpp RCI SWI 5w2 B RCA A TO D A 2 107 D jg CA SR AS SVA B iPHIB m ULN2003 ai 2 R43 LMaa4M j 4 4 OHA ayy BCB5 C 1gk R45 478 7 1 VREFB swe BIA 1 15 DIG 1A E B7A 14 cig A 6 ner 220P RIS igK lan B8 m B2A 2 15 DIG 2A HSE Bi IPHIA a MCL 27K MA B3A 3 14 DIG 3A ESA 3 28 ABS 12 PISA 4 13 DIG 4A RB4 14 4 Ri pog E E pus OZ BEA 5 12 SESSA vss ai ATA IL IMITA AUXA 15V v 1 T BBA DIG BA 7 osci 2 B2A na 3 RBS 8 SET Raz RB2 R4B Len 02 27 2 SW2A pis 2 4 B7A 7 Li DIE 7A y 20 0sc2 M BIA ha SKE AUXA OV CRC R42 R44 47 1 8 ct Reo BgA 1ug 47 VR4 3kB P12 C 1 AUXA 5v 1 a aav 2 2 I O3 A WD i CURRENT end RBB 2 E INTA u 568 AS ATK Los z 2 C whe HAT 1 R23 LEDI 3 SENSE C a MHS RAG MUXBA 5 043 VH3 coma m
72. Aa ABER 12 gt 5VA A SEG DA VPRTA E 12 2 R57 55 R7 ie s 4853 IPHIA R5B 56 2 ial 9 7 i wl 9 8 7 R72 IK Ro BOE SEB FA lt 4 Nm O lt u N m m o a u o SENSE A VSS R58 56 aa a IOHIA Lis 8 7 SEG GA lt FA IKE ca cia 5 AUSAUSEV 4053 R88 56 SSN H H H H Dapa 330N R28 Ska SEBCDRA VOLTS AMPS 53V 2 3 AUXA BVA 5VA A E i 4 ILOA e 5 2 B X 56R a a D 4 u B z ti t5 z 2 s Tosa 47 ST 5 IT 21 37 47 ST si R24 10K BB i 63V 22 pd DaN 3 v I5gV 1 Sua 6 Yi AZA e E TN 3 7 s Y MUXIA g IC5 B 7 AUXA 5V LF347M gt MUXBA ia 4 AUXA BVA ICOMA AUXA 5V 5 ze tum 440574 ZA v c6 8 220 a IC2 A 83v 4 OP 4053 zs vera 1 R4B 10K N ES 21 4 ipu 4 A TO D A Z zi SENSE A 12 19 ILOA AUXA BV ADCREFA SIN 12 VR7 LF347M 8 190 R22 338 n 7440574 100N m 2 BOA 2 19 SEG DPA E INTA ae BIA 3 18 SEG GA 4 17 AUXA BVA B2A SEG FA AUXA 5V 5 16 G B3A 5 i SEG EA w 6 15 SEG DA AUXA 15V 7 14 RE O P ON R2 3 SENSE A B5A SEG CA ak ER VRB 8 13 SEG BA e SWI A ale B7A EI 12 SEG AA ON OFF 1 BK2 er sp CLK oc 3 ja IC3 Ptiscssa as AUXAZ 5V 02 swi BERATEN cza 22 bia 3 BC849C EE E au ig
73. BB Ja SS PJ5 PJ2 R87 5 5 5 15 OVA V GT OP LED SE OP SE 5 ces ties 5 5 5 V 15 VA V GT OP 43 Main PCB Version 2 double sided version 19AT 258V HBC RI FSI 1 C47 N N m N o N s Ries x E N n mon 8 a 95 SER e 8 mtt pg nz 019 T FBI S s Ri23 E ZEN RI22 E2 C42 D56 BET C87 157 D77 FB4 1014 R63 RIB N x N a gt N m A 8 5 FB2 a 6 0 8 L4 3 a g 9 C5B E S n 5 c33 1 N a pss 2 D g R99 R37 5 L caa R102 D58 55 5 x x RI39 N D33 Ex354PFC MAIN RSB 35555 3710 2 m EK LA E ses cei 7 css 5 5 5 15 BVA V GT OP LED SE SE 5 V C53 5 5 5 GV 5 BVA V GT OP 44 PCB Version 3 amp 4
74. DPB E INTB E 3 18 SEG GB ICOMB AUX 9VA B2B 4 17 SEG FB AUXB 5V B3B 5 16 SEG EB e B4B 6 B SEG DB AUXB 15v DEB 7 14 EET RIgE 0 P ON RIg2 3 valaa SENSE B LE Dig1 BBg 2 B6B 8 18 SEG BB e SWIdI A AS gt B78 3 12 SEG AB 10103 2 1 ON OFF BK2 am CLK oc PICIBESSA Rigs AUXB 5v 0102 HURST EAN cize Cizz ciat i REY pz 920482 ay nis 1ggU HUN INs401 SEG LATB RCB 2a zB SE 3 a VRIgB s v 50v SEG ENB NDS E17 47 2K2 2 06 o AUXB 5V SEG ENB x AUXB 5V 21 1 Dig5 SESSESTR RES LL414 Diag LL414B Ang 4 TOCKI RCZ 22 IMg vB VDD RCI swa LJ 5183 10101 18 E RH IKB R114 19K 2181 UL 2003 REA Be TOS DZE Eds aia 2 A143 R145 _ e IOHIB 3 Wye AUXB BV BC85 F 10K 470 BIB DIG 18 17 878 1 4 5 RBZ 21 2 RNS I K B2B 2 15 DIG 2B RBB B68 AJ 12 IPHIB 7SENSEZB 3 14 s MELR e B38 DIG 3B Hus 5 858 3 Ba 4 13 B Ga mes RUZ 1Kg FI C PJig2 A B5B 5 12 DIG 5B yas 838 ILIMITA 221 AUXB 15v Sav B68 5 DIG BB 27 psci 2 828 2 7 m RB2 RI46 3k8 1 ICOMB u PJ122 B Optg3 BZB m mern AUX V Dace ABI E BIB R142 aay CHASSIS B 470K VRIB4 5 O B E AUXB 5V 1 3 igav 2 2 are O P1 22 C AU
75. EA PJI OP A 2 CEI SOV sn ESAIOK cr 842 VA 3 5 470P 228U 2 2 gt OP J ae gWB a 7 R63 R28 220 130 cigg 1BBN 33K BA521 Dan 2280 w u AUXA BVA EA CHASSIS 4 Ess ais L7 f INTO 3 3 58028 SAT BUZIIA AUXB SIBN 18 ska PJ2 re 2 CB nig 020 R3 wan TPZ RIBS L 1 PJ2 zw 15V DER 012 e 229 N 1012 38v oes PJ2 SFHBISA 3 we N 5V5 AUXB VA 4 n Kv AUXB 5V TX2 C 1 045 De dh w 2 2208 10K EATEB gt BYV2BC BASZI ta P12 2 waa on 1 OP B sav c35 REBA 1DK pug 199N 220R4 470P IKV C77 R32 220 231 ION BAS21 4gBV RB4 PE 126 AUXB QVA CHASSIS O FDI FIDUCIAL MARKEH5 O FD2 Fa O ECO la CHASSIS 1 10 PJE A IE14 5 7 SEHSISA 3 i PJg a TX2 G 3 2 5 DPTE mina PJE B R7 F BS A HT Diu 2 R55 AUXAZEISV BA521 4708 AREY BYV27 zw L4 EZ n 23 m Rg mH _ a r 22 7805 Tx2 B t Bar D42 Gan R67 c72 c23 R21 C84 pig gt cigs 2 44 22 BY 180 4700 m s v 25V 5gv 5gV 27 W 4 I M 220 1020 C24 1 35y S Ir NE EN AUXA BV BA521 w35 1 cot R25 OWE AUXA 5V AUXB 15 954 4H7 i Ben Cl N 24 BA521 470R FBB H24 22 2 AUXB 5V
76. EX354 Control Pcb VB Version 3 Sheet 2 60 AUXA 5VA
77. EX354D T amp Dual Triple 35V 4A Power Supplies Service Manual Manual Part Number 48511 0320 Issue 3 Specification Safety General Circuit Descriptions Control Board Calibration Parts List Component Layouts Circuit Diagrams MAIN OUTPUTS Voltage Range Current Range Output Voltage Setting Output Current Setting Operating Mode Output Switch Output Terminals Output Impedance Output Protection Load amp Line Regulation Ripple amp Noise 20MHz bandwidth Transient Response Temperature Coefficient Status Indication Table of Contents 14 16 18 43 51 Specification 0 to 35V minimum to AA minimum By coarse and fine controls By single logarithmic control Constant voltage or constant current with automatic cross over Electronic Preset voltage and current displayed when off 4mm terminals on 19mm 0 75 pitch Typically lt 5mQ in constant voltage mode Typically gt 50 in constant current mode Output will withstand up to 40V forward voltage Reverse protection by diode clamp for reverse currents up to 3A lt 0 01 of maximum output for a 90 load change 10 line change Typically lt 2mVrms lt 10mV pk pk constant voltage mode lt 200us to within 50mV of set level for 90 load change Typically lt 100ppm C Output on lamp Constant current mode lamp Meter Types Meter Resolutions Meter Accuracies LOGIC OUTPUT T
78. F which is nominally 2 45V IC7A is a differential amplifier with a voltage gain of 14 7 for an output voltage of 35V the voltage at IC7C pin 8 will be 2 38V VR9 trims differential gain to ensure good voltage regulation see Calibration section The output of IC7C drives the input of IC7A when the ON OFF switch SW1B isinthe ON position When SW1B is the OFF position the input of IC7A is grounded via R50 setting the output volts to zero The output of IC7A provides the gate drive GATE to the regulating MOSFET Q14 Q15 on the main pcb via D3 Current Control IC7D is the error amplifier which compares the voltage on the wiper of VR3 the current limit control with the voltage generated across the current sense resistor R21 When the output current reaches the set limit IC7D takes control via D4 changing the supply from constant voltage to constant current mode At the same time Q1 is turned on by IC7D making ILIMIT go high this is read by the microcontroller IC3 which turns on the constant current lamp LED2 VR4 sets the maximum output current VR8 adjusts the output current to be the same as the preset current at low levels see Calibration section Measurement and Display 14 The measurement and display is controlled by a microcontroller IC3 IC5 IC2 and associated components together with IC3 form a dual slope A to D converter Multiplexer IC4 under the control of IC3 selects the signals to be measured The status lin
79. HEADER 3WAY STR SIL STD GOLD HEADER 7 WAY STRAIGHT 156P HEADER 9 WAY STRAIGHT 156P SKT DIL 16 PIN RES 330RF W60 MF 50PPM RES 180KF W60 50PPM RES R10 FERRYALLOY POT 10K LIN SPLINE SHAFT 25MM POT 10K LOG SPLINE SHAFT 25MM RES PS H 2 2 10MM RES PS H 4 7 10MM Position FOR DISP1 2 101 102 SW3 SW1 SW101 PJ2 3 PJ102 103 PJ4 PJ1 PJ101 FOR IC101 R22 122 R1 R101 R21 R121 VR1 2 VR101 102 VR3 VR103 VR4 VR6 VR9 VR10 VR104 VR106 VR109 VR110 VR5 VR105 PCB ASSEMBLY CONTROL EX354 Version 3 44115 3010 continued Part Number 23377 4100 23379 1100 23424 0443 23557 0500 23557 0512 23557 0513 23557 0612 23557 0647 23557 0825 23557 0837 23620 0246 23620 0247 23620 0249 23620 0264 23620 9007 23685 0007 25061 0200 25061 0519 25117 0020 27164 0507 44115 3011 Description RES PS H 100K CF 10MM RES PS H 100R CERMET 10MM SKEL CAP 10NZ 1KV CER D10 P5 100 50V ELEC RC2 P1 5 220U 10V ELEC 7MM P2 5 CAP 10U 35V ELEC 7MM P2 1U0 100V 50V ELEC P2 CAP 10U 35V ELEC RE2 P2 CAP 100U 50V LOW ESR P3 5 CAP 470U 10V ELEC LOW ESR P3 5 CAP 100NK 63V P E P5 220NK 63V P E 5 330NK 63V 5 100NK 400V 368 SER P15 CAP 10NK 100V P E P5 CAP 100NK 250V MKP4 P10 LED T1 ROUND 3mm RED DISPLAY 3 DIG 56 LED 9MM LEG DIO 1N5401 IC ULN 2003A 16 PIN PCB ASSY SM EX354 Position VR8 VR
80. IAL 1 3 OHMS CHOKE 1 8 COMMON MODE UL INDUCTOR BOOST EX SERIES UL CHOKE 1mH EF16 EX CHOKE 140uH AT 4 EF25 EX MAGAMP 35V 4A EX354 5 5 EX354 CHOKE 110uH AT 5A EF25 EX CHOKE 3 6uH EF16 EX FUSE CLIPS FUSE 10AANTISURGE T HBC CER FUSE 5 0AT SUBMIN PCB MTG UL TAB 4 8 0 8 STR 10AMP R A SOLDER UL HEADER 2WAY STR SIL STD GOLD HEADER 7 WAY STRAIGHT 156P HEADER 9 WAY STRAIGHT 156P RES 10R0F W60 50PPM RES 22ROF W60 MF 50PPM RES 33ROF W60 MF 50PPM RES 47ROF W60 50PPM RES 100RF W60 MF 50PPM RES 220RF W60 MF 50PPM RES 270RF W60 MF 50PPM RES 330RF W60 MF 50PPM RES 470RF W60 MF 50PPM RES 536RF W60 MF 50PPM RES 1K00F W60 MF 50PPM RES 2K20F W60 MF 50PPM Position SKIC2 3 SKQ5 FOR SKQ5 HSBR1 FB1 5 6 7 8 TX1 TX2 14 5 11 2 L3 L10 L6 7 MA1 2 MA3 L8 L9 FS1 FS1 FS2 PJ4 PJ3 2 3 PJ5 PJ1 2 R87 104 R13 37 38 58 67 70 105 120 121 R127 R11 15 122 R44 106 R84 R29 32 34 R89 R2 10 85 123 R124 R25 26 91 101 109 112 126 R14 42 46 115 117 PCB ASSEMBLY MAIN EX354T Version 2 44115 1210 continued Part Number 23202 2270 23202 2330 23202 2390 23202 2470 23202 3100 23202 3110 23202 3220 23202 3270 23202 3330 23202 3430 23202 3470 23202 4100 23202 4360 23202 4390 23202 4470 23202 4620 23202 4820 23202 4910 23202 5680 23207
81. NPN BC546 TRAN PNP ZTX751 TRAN NPN ZTX651 TRAN NPN BF422 TRAN MOSFET N CHAN 50V 60V TRAN MOSFET N CHAN 500V 20A TRAN MOSFET N CHAN IRFB11N50A TRAN MOSFET N CHAN 60V TO 220 OPTO COUPLER SFH615A 3 UL IC LM358N 8 PIN IC V REG 7805 TO220 IC V REG 7815 TO220 IC L4981A 20 PIN IC 4013B 14 PIN IC 4069UB 14 PIN PCB MAIN EX354 PFC Position D1 D2 5 44 45 50 61 63 69 D54 67 D78 D42 43 D12 55 65 70 D66 D20 23 D10 D58 60 D52 D33 34 35 36 59 SC1 BR1 Q11 12 13 Q23 Q6 10 Q22 Q1 8 Q3 Q2 Q18 20 Q14 15 Q5 Q4 7 Q16 IC12 13 14 IC5 IC2 3 IC4 IC8 IC7 25 ASSEMBLY MAIN EX354 Versions 3 amp 4 44115 3040 Part Number 20030 0263 20037 0301 20038 9501 20210 0101 20234 0011 20234 0100 20613 0007 20613 0018 20661 0225 20661 0280 20670 0135 20670 0300 20670 0340 20670 0400 20670 0401 20670 0410 22040 0940 22109 0130 22109 0210 22154 0160 22154 0230 22154 0240 22154 0460 22154 0470 22154 0500 22154 0610 22312 0242 22315 0310 22315 0460 22455 0040 22520 0190 22573 0041 22573 0206 22573 0209 26 Description WASHER M3 ZPST WASHER SHK PROOF ZPST WASHER M3 SPRING NUT M3 ZPST SCREW M3 X 10 PNHDPZ ZPST SCREW M3x6 PNHDPZ C W EXT SH P SIL PAD TO220 PLAIN SIL PAD TO 3P 247 PLAIN SPACER HEX M3 x 12 NPBR SPACER HEX STUD M3 x 8 NPBR CLIP GPO2 FOR PCB MTG H SINKS HEATSINK PCB MTG 63MM PLAIN HEATSINK TO2
82. P GP02 FOR PCB H SINKS HEATSINK PCB MTG 63MM PLAIN FERRITE SLEEVE APPX 8 16 14L BEAD DOUBLE FERRITE MAGAMP 5V 5A EX354 CHOKE 110uH AT 5A EF25 EX FUSE 4 0AT SUBMIN PCB MTG UL Position FOR SKD28 SKQ16 FOR SKD28 SKQ16 SKD28 SKQ16 FB6 7 L8 FS2 1 5V 5V AUX OUTPUT EX354Tv Version 4 44115 3130 continued Part Number 22573 0041 22575 0077 22575 0208 23202 0220 23202 1536 23202 5680 23210 0470 23222 0047 23222 1220 23222 2220 23271 0020 23377 4100 23424 0468 23557 0818 23557 0822 23620 0268 25031 0060 25031 0080 25117 0020 25349 3500 25388 0212 25601 0660 27001 0120 43187 1780 44115 3131 Description HEADER 2WAY STR SIL STD GOLD SKT 2 WAY IDT 1P SKT 8W 156 20AWG Yellow IDT RES 22ROF W60 MF 50PPM RES 536RF W60 MF 50PPM RES 6M80F W60 MF 50PPM RES 47R0J 2W 250PPM RES 4R70J W33 FUS L NFR25 RES 220RJ W33 FUS L NFR25 RES 2K20J W33 FUSLE NFR25 RES 0R047J 2W MR RES PS H 100K CF 10MM CAP 470PK 1KV P5 2U2 50V ELEC LOW ESR P2 CAP 1000U 10V ELEC LOW ESR P5 CAP 220NK400VP E 468 SER P15 DIO BYW100 200 DIO BYV32E TO220AB DIO 1N5401 TRAN PNP MJE350 TRAN NPN BF422 TRAN MOSFET NCHAN 60V TO 220 OPTO COUPLER LINEAR IL300 WIRE SET CUT 1 5 5V EX354TV PCBASSY SM 1 5 5V EX354TV 4 Position TP3 R58 R124 R128 R137 R27 R4 R30 R33 34 R125 R76 VR2 C22 C29 C36 C78 C53 08 028 01 013 018 016 2 1 5 5V
83. PACER HEX M3 x 12 ZPST PCB 20670 0135 GP02 FOR PCB MTG H SINKS SK1 2 4 5 7 10 3 6 20670 0300 HEATSINK MTG 63MM PLAIN SK1 2 4 5 7 10 3 6 20670 0340 HEATSINK TO220 CLIP ON 20 C W FOR D57 D59 1C2 1C3 22040 0901 BEAD FERRITE FX1115 FB2 3 5 8 1 4 22109 0120 TRANSFORMER HF POWER 2 22109 0130 TRANSFORMER GATE DRIVE TX1 22154 0130 CHOKE 22uH RADIAL 54 MILLIOHMS L12 22154 0160 CHOKE 1mH AXIAL 1 3 OHMS L3 4 5 22154 0180 CHOKE 350uH 4A L6 7 22154 0190 200uH 5A L8 22154 0220 CHOKE 3 3mH 4A COMMON MODE L1 2 22154 0500 4A MA1 2 22154 0510 5A MA3 22300 0211 FUSEHOLDER PCB MOUNTING 22315 0240 FUSE 6 3A 20MM FB GLASS FS2 22315 0248 FUSE 10AANTISURGE HBC CER FS1 22520 0190 AC MAINS RECEP 10AMP SOLDER MTG PJ3 22573 0207 HEADER 7 WAY STRAIGHT 156P PJ4 PJ5 22573 0209 HEADER 9 WAY STRAIGHT 156P PJ1 2 23185 0000 RES ZERO OHM LK2 17 1 18 19 23202 0100 RES 10ROF W60 MF 50PPM R94 95 23202 0150 RES 15ROF W60 MF 50PPM R11 12 14 15 23202 0220 RES 22ROF W60 MF 50PPM R67 68 69 70 91 92 23202 0470 RES 47ROF W60 MF 50PPM R122 23202 0680 RES 68ROF W60 MF 50PPM R105 23202 1100 RES 100RF W60 MF 50PPM R44 106 102 103 18 PCB ASSEMBLY MAIN EX354T Version 1 44115 0850 continued Part Number 23202 1220 23202 1470 23202 1536 23202 2100 23202 2220 23202 2470 23202 3100 23202 3220 23202 3430 23202 4100 23202 4220 23202 4470 23202 45
84. Position FOR DISPLAYS FOR LED2 102 FOR LED1 101 103 SW2 SW1 SW101 PJ2 3 PJ102 103 PJ5 PJ1 PJ101 PJ5A FIT ON REVERSE R22 R122 R1 R101 R21 R121 VR1 2 VR101 102 VR3 VR103 VR4 VR6 VR9 10 VR104 VR106 VR109 110 VR5 VR105 VR11 VR8 VR108 VR7 VR107 C30 C34 C130 C18 C23 C118 C123 C21 C121 C7 C107 C16 C37 C116 C137 C25 26 C125 126 C138 C20 C22 C120 C122 C3 C8 9 C12 C31 C33 C103 C108 109 C112 C131 C1 C101 C10 11 C110 111 C36 C136 C13 14 C113 114 C2 C102 LED1 2 LED101 LED102 LED103 DISP1 2 DISP101 102 D10 D110 35 PCB ASSEMBLY CONTROL EX354 Version 4 SM Stage 44115 3121 Part Number 23105 0000 23105 0100 23105 0220 23105 1100 23105 1270 23105 1430 23105 1470 23105 1560 23105 1680 23105 2100 23105 2240 23105 2360 23105 2390 23105 2470 23105 2560 23105 2820 23105 3100 23105 3110 23105 3120 23105 3150 23105 3270 23105 3330 23105 3560 23105 3750 23105 4220 23105 4470 23105 5100 23105 6100 23106 3100 23106 3110 23407 0221 23407 0470 23407 0471 23461 0020 25021 0010 36 Description RES SM0805 ZERO OHM RES SM0805 10R0F W1 RES SM0805 22ROF W1 RES SM0805 100RF W1 RES SM0805 270RF W1 RES SM0805 430RF W1 RES SM0805 470RF W1 RES SM0805 560RF W1 RES SM0805 680RF W1 RES SM0805 1K00F W1 RES SM0805 2K40F W1 RES SM0805 3K60F W1 RES SM0805 3K90F W1 RES SM0805 4K70F W1 RES SM0805 5K60F W1 RES SM0805 8K20F W1 RES SM0
85. R1 C22 C29 C36 C78 C53 D8 37 5V 3 3V OUTPUT EX354T Version 3 44115 3050 continued Part Number 25031 0080 25349 3500 25388 0212 25601 0660 44115 3051 Description DIO BYV32E TRAN PNP MJE350 TRAN NPN 422 TRAN MOSFET N CHAN 60V PCB ASSY SM 5V Position D28 Q13 Q18 Q16 5V 3 3V OUTPUT EX354T Version 3 SM Stage 44115 3051 Part Number 23105 0100 23105 1470 23105 2100 23105 2220 23105 2330 23105 2470 23105 3100 23105 3220 23105 3430 23461 0015 23461 0020 23461 0200 25021 1010 25132 0010 25132 0210 25132 0290 25377 1000 27106 1110 35555 4580 Description RES SM0805 10ROF W1 RES SM0805 470RF W1 RES SM0805 1KOOF W1 RES SM0805 2K20F W1 RES SM0805 3K30F W1 RES SM0805 4K70F W1 RES SM0805 10KOF W1 RES SM0805 22KOF W1 RES SM0805 43K0F W1 CAP SM0805 10NK 50V X7R SM0805 100NZ 50V Y5V CAP SM0805 2N2J 50V 7 DIO SM BAS21 DIO SM ZEN 5V6 W5 DIO SM ZEN 6V8 W35 DIO SM ZEN 18V W35 TRAN SM NPN BC849C IC SM LM358M DUAL OP AMP PCB 5V OUTPUT Position R87 R104 R126 R91 R101 R109 R115 R117 R60 R118 R107 108 R114 R119 R88 R116 C38 C50 C39 40 C43 C52 C46 D9 D11 D17 D32 D12 D70 D10 D35 36 Q8 Q20 IC5 1 5V 5V AUX OUTPUT EX354Tv Version 4 44115 3130 Part Number 20613 0007 20670 0135 20670 0300 22040 0030 22040 0940 22154 0510 22154 0600 22315 0459 38 Description SIL PAD TO220 PLAIN CLI
86. R20 dampens any oscillation across 110 The current in the forward converter is monitored by R16 and if excessive activates latch Q22 Q23 to provide a pulse by pulse current limit Main outputs The voltage on the secondary winding is rectified and L C filtered and fed to a linear regulator To minimise power dissipation in the linear regulating element the voltage across it is maintained at about 1V by means of a magamp Referring to output A the linear regulation is performed by MOSFET Q14 which receives gate drive from the front panel pcb The voltage across Q14 is monitored by Q11 which generates reset current to the magamp MA1 whenever the voltage across drain source of Q14 forward biases the base emitter junction of Q11 024 is the main rectifier and flywheel diode The rectified pulse is filtered by L6 and D44 R111 and C76 generate a negative rail and via R63 sink the base bias current of Q11 which would otherwise cause the output to remain slightly positive when 0V was set on the front panel In the event of a fault where control of the magamp is lost and the voltage across the filter capacitor C33 rises above 40V the opto isolator IC13 is activated via zener diode 058 and R102 and causes primary side thyristor SC1 to discharge the primary control power rail This is followed by a normal restart If the fault persists the PSU will continue to hiccup Fixed 5 3 3V output This works in an identical fashion to t
87. VAC X2 P P P27 5 UL CAP 330NK 160V 250V P P P15 DIO 1N4148 B R DIO BAV21 DIO BYW100 200 DIO BYV32E TO220AB Position RT1 C5 C6 7 11 12 C82 85 C20 21 22 58 59 C118 121 C27 28 C68 C17 C8 49 C32 C23 25 C70 71 C18 19 C30 C33 37 C29 C15 72 73 93 C36 78 C88 C3 86 C2 13 24 26 31 35 39 40 43 52 61 62 69 74 75 80 81 87 92 102 107 110 115 117 120 41 42 44 45 C4 34 C46 48 C76 77 C51 53 54 C38 50 90 91 101 C14 C89 C1 9 47 C16 94 119 D9 11 13 14 25 27 29 32 37 38 D15 16 17 30 31 39 41 53 56 57 68 77 D6 7 8 18 19 21 22 D24 26 28 PCB ASSEMBLY MAIN EX354T Version 2 44115 1210 continued Part Number 25031 0100 25031 0110 25031 0140 25115 0910 25130 0207 25130 0229 25130 0246 25130 0903 25130 0913 25130 0914 25130 0916 25130 9210 25210 0050 25211 0301 25349 3500 25349 5560 25349 7580 25383 0506 25383 0507 25384 9001 25388 0211 25388 0212 25601 0490 25601 0510 25601 0610 25601 0660 27001 0060 27106 0513 27160 0009 27160 0013 27168 0040 27226 0130 27226 0690 35555 3710 Description DIO BAX12A DIO BYV26C DIO DUAL MURH860CT TO220AB DIO 1N4007 B R DIO ZEN 15V W4 DIO ZEN 5V6 W4 DIO ZEN 22V W4 DIO ZEN 5V1 W4 DIO ZEN 6V8 W4 DIO ZEN 39V W4 DIO ZEN 3V3 W4 DIO ZEN 18V W4 THYRISTOR 2N5064 RECTIFIER BRIDGE D20XB60 TRAN PNP MJE350 TRAN PNP BC556 TRAN PNP ZTX758 TRAN NPN BC337 TRAN
88. XB BV z CURRENT ps 3 2 INTB e 3 CHASSIS RA2 AZB 2 RAI 7 MUXIB EN 2 1 R123 lt rays eae RAD Dias F CMS ika VRIO3 z ZRC259 470P lak 2 4 5 o o o ete PJ183 Ar Digg VREFB NB LL4148 ICOMB AUXB 18v 2 M mE FINE san inc 0107 S TE ADAM anioe s le 3 47P O IEOMB 10N LL4148 101 5 3 RI2610M oP 1ggV Dig4 j RI28 C24 RING ON OFE RI13B E ee LL4148 AUXB 5VA MU N 1426 228 B S5WI 1 B 220K XDETS aa v 7 5 RI34 RISI R139 4K7 AUXB 5V 1101 so Ic1a7z7 CN 8 o R140 AUXB 5V T ak Risa LM324M A 7 3 no LL414B 4 5 10K _ 5 ces 10107 4 4 PJIBI G 7 452 8 VRIBS RIBS VRIBS 2K2 RI35 12K RI3SA 2K4 RI3B 4K7 47 LM324M 1 cize eh 4KZ 75K N aon 27K vRIBI e o AUNBZSBV PJigi F r 126 lak RI31 R132 4 a 5 56K 18k R sa ammi C114 132 120 35V cus 47 ja may IGN 10107 8 PJigi D 4 e 1 220 Ir LM324M vriia PE PIB5 aes 5 AUXB BVA C112 2K2 100 e DIBI LL4148 CHASSIS B ICOMB 102N sse id ias RAI 1ggV 777 PJigl 15K 10K 5 E 8128 ee A PJIBI B 2 n AUXB 5V Dig2 N p ADERESA LL4148 ICOMB PJIBI A 1 oF 7B BURG SN 2181 O nor FITTED au
89. YV2BE BYVOEE us 5 22gH 3 2 2 W t Y K PIN 250v ee 1 10001 OP A 1 BAV 2 ua cup 531 C61 iz VRECT 110 R20 DIS FB2 mant OPTE PEE CSB R42 VA 3 CHASSIS HT ImH BAV21 470P 2K2 OPJI 10K P 2200 054 SKD54 3 aw 1 VRECT MURHBBgCT maa a crt ee CSG A wy D63 R29 270 0WB Ciag N HTE 3 33E BAV21 R96 RISO 220N 220N 1 BM8 anov 400V L3 A 17 i 400V IW 63V 2N2 1 2 1 wea WED PE PE 100 RIS t 7 7 T M DBI bo E AUXA BVA EA ee sea CHE AY R32 BYV260 MA2 CHASSIS a SER Gar 1 77 R129 A 03 2 620K 1 23 4A 2W IR US wg cus T2W FI4 BYV2BC 523 Hive SW 330N e 2N2 SKD26 L7 015 fev gv H 5 350uH BUZIIA AUXB 15V 5 R132 R136 nm PP 470R D2 t NEC e M t C88 R E ON 8245 5208 5pv Ca Lg Ila r2W 4 BYV2BC 2 5 S 19gN R45 AUXB SV 86512 100 4uH D57 1 4 gt ES TP2 IBK aael gt 53v 2 DEQ L T 100R PJ2 Ke 2W PE L 3 4 528 RIS 027 026 W MJE AUXB B V 5 c4 n 47 IN BYV F21 EE IC12 wa 350 pes PJ2 228N DER R120 a FBI N B 4148 32E 470P SEHBISA TS 4 QD PJ2 63V BAV21 228 IV 4 3 W4 ag lt i gt R74 2W I e lt AUXB 5V 4
90. a R127 and 057 The gate drive pulses to Q5 are given a slight negative offset by C94 D52 D53 and R112 to give extra noise immunity C117 is connected to the soft start pin of IC8 and provides a degree of soft start Once the boost converter is running the supply to IC8 is derived from an auxiliary winding on the boost inductor L3 via fusible resistor R61 rectified and filtered by D7 fitted with snubber C17 R13 C2 and C15 and also from a power back winding via fusible resistor R17 on the main converter transformer TX2 rectified and filtered by D6 C87 and C93 Diodes D68 and D56 isolate the startup current bleed from the auxiliary supplies R131 R132 R133 R71 C4 and C34 form a two stage RC filter to feed a voltage proportional to the mains voltage to IC8 pin 7 which after an internal 1 V transformation is fed to the internal multiplier For a universal mains input the voltage at this pin will vary between 1 5V and 5 5V R135 and R136 supply a current derived from the full wave rectified mains voltage to IC8 pin 4 to be used by the internal multiplier Also fed to the internal multiplier is the output of the voltage error amplifier of IC8 pin 13 The input to the error amplifier at pin 14 is from potential divider R74 R75 and R93 This potential divider monitors the voltage on the boost stage output capacitor 88 and this is compared to an accurate internal reference voltage Thus a steady voltage of about 380V is maintained acros
91. ain PCB Version 1 n m g PJ3 52 I g 5 ta gt a g w H504 vor N s 2 06 i ca 5 o R16 F o 5 5 ci a naa R98 024 T B 594 m 2 6 5 w R14 EX354T MAIN 35515 1548 3 EK LA 045 R19 027 015 ce S m C21 D26 w N T on 59 E 5 R70 o z 5 a a C35 s css 8 o 2 R99 R37 55 css R191 R104 in R38 R66 5 ma FE 2 5 058 052 a pg 055 Por u o 5 s ce a 9 R39 H5015 062 057 5 g 20 016 i S is LZ 033 o R95 R
92. ase with the voltage For a detailed description refer to the ST Power Factor Corrector Applications Manual Initial start up is via R79 and R80 which charge the auxiliary storage capacitor C32 and HF bypass capacitor C13 with voltage limiting zener diode D66 When the voltage on C32 exceeds the under voltage lockout level of 16V IC8 starts up and supplies drive pulses to the gate of the boost MOSFET Q5 via R127 and 057 The gate drive pulses to Q5 are given a slight negative offset by 94 D52 D53 and R112 R112a to give extra noise immunity C117 is connected to the soft start pin of IC8 and provides a degree of soft start Once the boost converter is running the supply to IC8 is derived from an auxiliary winding on the boost inductor L3 via fusible resistor R61 rectified and filtered by D7 fitted with snubber C17 R13 C2 and C15 and also from a power back winding via fusible resistor R17 on the main converter transformer TX2 rectified and filtered by D6 C87 and C93 Diodes D68 and D56 isolate the startup current bleed from the auxiliary supplies R131 R131a R132 R133 R71 C4 and C34 form a two stage RC filter to feed a voltage proportional to the mains voltage to IC3 pin 7 which after an internal 1 V transformation is fed to the internal multiplier For a universal mains input the voltage at this pin will vary between 1 5V and 5 5V R135 R135a and R136 R136a supply a current derived from the full wave rectified mains voltag
93. djust Vser to maximum and check voltage is 5 1xxV to 5 8xxV Set output to 5 0xxV and note reading With RHS main output off press SHOW AUX PRESET switch and adjust VR2 on AUX pcb until the RHS voltage display matches the DMM reading noted Check RHS current display shows 5 01 to 5 07 Connect variable load to output and adjust for an external current meter reading of 5 0x Amps Check voltmeter reads the same as in the 5V check above 0 025V Check UNREGLED is off Disconnect load Connect S C across output Check UNREG LED is on Remove S C Noise Measurements Differential and common mode noise checks can be made using the arrangement below Keep all unscreened connections as short as possible DIFFERENTIAL MODE NOISE COMMON MODE NOISE 1 COAXIAL CONNECTIONS TO 20MHz TRMS VOLTMETER OR SCOPE Make measurements with the output fully loaded Measure differential and common mode noise one at a time on a 20MHz TRMS voltmeter or use a 20MHz bandwidth limited scope for peak to peak measurements 17 Parts List PCB ASSEMBLY MAIN EX354T Version 1 44115 0850 Parts not fitted on PCB ASSY MAIN EX354D Version 1 44115 0870 shown in bold Part Number Description Position 20030 0263 WASHER M3 ZPST SPACERS 20037 0301 WASHER SHK PROOF ZPST SPACERS TO UNDERSIDE OF PCB 20038 9501 WASHER M3 SPRING SPACERS 20234 0027 SCREW X 6 PNHDPZ ZPST SPACERS 20613 0006 SIL PAD TO220 PLAIN SK1 2 4 5 7 10 3 6 20661 0225 S
94. e rss 0 1 2 isot JUL C34 PJ3 A DB 1 54 IKV VREFA SENSE A LL414B ITOMA aaa ot Fre c35 i MA mmc AREE 5 SENSE C P3 VOLTS FINE 1ggN 613 208 47P AUXA 15V n Pis O R28 1gN LL4148 SIR PIE E33 c138 3 n28 ON OFF 1ggV D4 lau az C24 SWI B re Rat Ah UXA SVA u 2 mi 2 LIN 2282 ig 22 pe F 38V vOLTS COARSE I 6 R34 R51 E PJI H B 1 VC VR2 1 17 8 8 5 R39 4K7 T AUXA 5V seh a AUXA 5V PJS SENSE C N 1 a SM324M t1 en nn i 102 LL4148 PJ1 E 7 2 18k 4 C42 C27 C21 LIN vas 2 2 R35 12K R3SA 2K4 4k7 47 Hiis m d SIA N 2200 4K7 75K 4 lav C25 vm C T 1 7 SO 43 ee 56K HA J ets 2 C36 iggN 35v R37 anav VHIg 220K Ex PJI D 4C 1 2 2 asa EEN 5 LM324M PS 1a 5037 e AUXA OVA E c z ue La 5 PJI 1 9 ICOMA von Mis m S Luisa R M ids 15K ak SENSE A d GATEA AUXA 5V 11K AUXA 5V 1 ADCREFA coma e 1 PJI A 1 oma 354 b Mas EX354 Control Pc NOT FITTED ME Version 4 Sheet 1 61 A125 AUXB SVA 22 savasa
95. e SW1 from the output ON OFF switch is read by IC3 to determine which signals are measured as follows Status Voltage Measurement Current Measurement Output Off Preset Volts VPRT amp ILO Preset Current IPHI amp ILO Output On Output Volts SENSE amp VOLO Output Current IOHI amp ILO IC3 processes the measurement and drives the two multiplexed 3 digit 7 segment LED displays via digit driver IC1 and segment latch IC6 Individual segment current limit is provided by RP1 and RP2 The constant current lamp LED2 is part of this multiplexing scheme the output on lamp LED1 is driven directly from the 5V auxiliary rail via R2 when the dc output switch SW1 A is closed AUX Output Control Version 4 Refer to the Control schematic Version 4 VR11 is the front panel Vset control for the AUX output providing an output range of lt 1 5V to gt 5 0V With the right hand main output off the meters read preset volts VPRTB and preset current limit IPHIB via the open position of front panel switch SW2 A SW2 B SHOW AUX PRESET whose poles are connected to multiplexer IC104 of the ADC When SHOW AUX PRESET is pressed the voltages at R63 R64 and R61 R65 are read which correspond to the set output voltage and current limit 5Amps respectively 15 Calibration Refer to the General section for dismantling instructions and safety precautions Component adjustment references are given as Channel A Channel e g VR5 VR105 Channel A is
96. e to IC8 pin 4 to be used by the internal multiplier Also fed to the internal multiplier is the output of the voltage error amplifier of IC8 pin 13 The input to the error amplifier at pin 14 is from potential divider R74 R74a R75a R93 R93a This potential divider monitors the voltage on the boost stage output capacitor C88 and this is compared to an accurate internal reference voltage Thus a steady voltage of about 380V is maintained across C88 Another potential divider R81 R81a R82 R82a R98 monitors the voltage across C88 and feeds into pin 3 of IC8 which is the over voltage shutdown Pin 8 is the output of the multiplier and is the programming current for the internal current error amplifier This signal is taken to the mains supply side of the current sense resistor R83 via R8 The other input of the current error amplifier is taken to the other side of R83 via R72 The current error amplifier thus compares the signal across the current sense resistor R83 with the programming current and adjusts the PWM drive to the boost MOSFET Q5 accordingly R73 and C86 with R72 form the compensation network around the current error amplifier When the mains supply falls below about 85Vrms the circuit comprising of long tail pair Q6 and Q10 and Q1 act on the soft start input of IC8 to curtail operation Boost Stage Q5 and boost inductor L3 raise the incoming full wave rectified sinusoidal mains voltage to a value some 20V higher than the peak
97. gU iggN INS401 SEG LATA 24 ZA 2 VRE 50v 50v RCB 33K vpLoA 2K2 SEG ENA His 23 x 17 47 AUXA 5V RC4 22 SEG ENA N RC3 a 5EG LATA 2 RB ee AURAT TY Da 114148 L TOCKI RC2 835 Ma OA VDD j 2 s LJ 53 18 IKE RI4 18K Pl ULN2P 3 RBS Ed 2 R43 ERI TM 13 4 6 DHIA 0 r 321 RE AUXA BV BC859C AN 1 R45 470 BIA 16 DIG 1A RB7 D B7A e 14 cig B2A 2 15 DIG 2A NEE BBA A o ET HIE lak IPHIA C38 SENSE A S uN 3 14 DIG 3A 5 5 3 B4A 4 DIG 4A v B4A Ne Ge 10 Pu2 a LKI FITTED ON EX354D 4 RB4 CHASSIS A ESA 5 12 DIESER vss 3 Een ILIMITA AUXA 15V Lov SAFETY SKT VERSION ONLY 22 e R44 FITTED ON BACK OF PCB BBA DIG 6A OSC 2 2 RS 2 02 8 B7A 7 1g DIG 7A 25 05C2 BIA 9 AUXA BV RBI m Ei R42 His CHASSIS B RA 8 3 BRA u 470K VR4 JEB 3 AUXA 5V 1 3 2K2 eo AUXA OV EUBBENT PJ2 C Orc 5V 3V SECTION s PJ4 D v 3V SECTION E INTA VREFA RA2 AZA 54 e z Ora XTLI 2 7 MUXIA nus E CSTCR G A C43 C13B MUX A DB IKg 3 SENSE c33 4MHz shea 470P x PJ4 C SENSEZE pon mm 4700 2 4 5 55 10 444 BIASA P4 E DB 2 5vC
98. he main outputs with the exception that the output voltage control and current limit functions are performed by op amp IC5 This output is fused in case of a failure in the current limit circuit Secondary auxiliary power supply The power rails for the control electronics of the two main outputs are generated from auxiliary windings on the main converter transformer Again referring to channel A the 15V is peak rectified by D40 C72 and zener regulated by D42 The 5V rail is rectified by D18 D19 and filtered by L4 and C23 The inductor L4 is held in continuous conduction and thus the voltage at the input to the three terminal regulator IC2 is maintained at a low value The 5 is peak rectified by D13 C18 and zener regulated by D20 PCB Change Note that during the period of this Version 2 the pcb was changed from a single sided layout with zero Ohm links fitted to a double sided layout see Model Changes section The component positions and numbering remained the same links were simply replaced by component side tracks The benefit of this change was the greater mechanical security that the plated through holes gave particularly to the heavier components Main PCB Versions 3 amp 4 Component references when output specific are given for Channel A the left hand main output when viewed from the front with Channel B references shown in brackets Where supply rail and signal names are given these will be followed by
99. iption SPACER 56 INCH 7 SEG LED 3 5H SWITCH SLIDE 2P2W SWITCH PUSH PUSH SPPH11470B HEADER 7 WAY STRAIGHT 156P HEADER 9 WAY STRAIGHT 156P SKT DIL 28 PIN RES 10R0F W60 50PPM RES 22ROF W60 MF 50PPM RES 100RF W60 MF 50PPM RES 220RF W60 MF 50PPM RES 330RF W60 MF 50PPM RES 470RF W60 MF 50PPM RES 680RF W60 MF 50PPM RES 1K00F W60 50PPM RES 3K60F W60 50PPM RES 3K90F W60 50PPM RES 4K70F W60 50PPM RES 4K99F W60 50PPM RES 8K20F W60 50PPM RES 10KOF W60 MF 50PPM RES 11KOF W60 MF 50PPM RES 14K3F W60 MF 50PPM RES 15KOF W60 MF 50PPM Position DIS1 2 101 102 SW3 SW1 101 PJ2 PJ1 PJ101 IC3 103 R50 150 R25 125 R40 140 R10 110 R22 122 R45 145 R2 102 R11 12 23 48 111 112 123 148 R47 147 R46 146 R38 39 138 139 R34 134 R18 118 R4 5 14 15 17 24 30 32 41 43 44 49 51 104 105 114 115 117 124 130 132 141 143 144 149 151 R28 128 R35 135 R33 133 PCB ASSEMBLY CONTROL EX354T Versions 1 amp 2 44115 0860 Part Number 23202 3270 23202 3330 23202 3560 23202 3750 23202 4180 23202 4220 23202 4470 23202 5100 23202 6100 23301 0415 23301 0464 23320 0003 23347 0330 23347 0340 23377 2220 23377 2470 23377 4100 23379 1100 23424 0443 23427 0323 23427 0329 23427 0353 23427 9211 23557 0501 23557 0511 23557 0612 23557 0647 23557 0668 23557 0685 23557 0825 23620 0246 23620 0247 23620 0249 23620 0264 23620 90
100. ise cause the output to remain slightly positive when OV was set on the front panel Fuse FS3 protects the primary power devices and TX2 from the damaging effects of a short circuit filter capacitor or faulty linear output MOSFET Q14 In the event of a fault where control of the magamp is lost and the voltage across the filter capacitor C33 rises above 40V the opto isolator IC13 is activated via zener diode 058 R102 and causes primary side thyristor SC1 to discharge the primary control power rail This is followed by a normal restart If the fault persists the PSU will continue to hiccup Resistors R96 and R130 prevent the output from floating to a dangerous voltage with respect to the chassis C108 and C51 help to reduce noise voltages on the output Secondary auxiliary power supply 12 The power rails for the control electronics of the two main outputs are generated from auxiliary windings on the main converter transformer Again referring to channel A the 15V is peak rectified by D40 C72 and zener regulated by D42 The 5V rail is rectified by D18 D19 and filtered by L4 and C23 The inductor L4 is held in continuous conduction and thus the voltage at the input to the three terminal regulator IC2 is maintained at a low value The 5 is peak rectified D13 C18 and zener regulated by D20 Fixed 5 3 3V output Version 3 For Version 3 the 5V 3 3V output is contained on a separate pcb mounted to
101. ja SENSE B e AUXB 5V 3 4 s B OHIB AUXB BVA RP1g3 5 me 15 Eig3 cias cua 4 5 330N 2 2 om 5 ES 2185 33gN BE AUXB 5VA N ae 1 182 C L Jag 3 5VA B 10102 8 1BgK VOL OB 4053 102272 l s vpp ET 12 8 3 MUXOB S 2 Cig7 2 7 470 Ya 5 E ICOMB 7 AUXB BVA AUXB 5V 12 5 AUXB VA ZB Iclas B 5VA B 0 224 15185 D Dr RUZ siat R121 516 p 4 1BK 1 4 192 13 v j R148 13 neve f MB AUxB 5SV ES z a k SS 2 3 w 20 ya s B n 12 3 AUXB OV 12185 x 5102 Ii96 MESTA DE INTB hn age A122 4 SENSE B ADCREFB 9 wa 338 ILOMB 1 sas _ 2 19 sEG DPB s 128 ah 3 ai AUXB 5V AUXB BVA BIB 3 SEG GB PE saa 4 7 SEG FB AUXB 5V B38 _5 16 sEG EB ICOMB uh 5 i a en 3 RI B AUXB 15V vai 15 B58 _ 7 14 SEG CB min dox O P ON 192 ssa 2 RUM SENSE B BB _ 8 13 SEG BB SWI0I A f LI B78 8 12 SEG AB Eins AR BN oFF BK2 CLK oc 22 AUXB 5V 1 con laz 113 c23 swiat Ban N A e 10 aU dai SEG LATB IgM SEG ENB Jes o AUXB BV 47 voros 2 2 5 5 itis hd SENSE B E FIg4 Dias 5 R108 IN Digg i sn 33K 414 184148 RI AUJXBA SM ATCC MCLR XTLIQI B rem IM
102. may be live and opening the covers or removal of parts except those to which access can be gained by hand is likely to expose live parts The apparatus shall be disconnected from all voltage sources before it is opened for any adjustment replacement maintenance or repair Capacitors inside the power supply may still be charged even if the power supply has been disconnected from all voltage sources but will be safely discharged about 10 minutes after switching off power Any adjustment maintenance and repair of the opened instrument under voltage shall be avoided as far as possible and if inevitable shall be carried out only by a skilled person who is aware of the hazard involved If the instrument is clearly defective has been subject to mechanical damage excessive moisture or chemical corrosion the safety protection may be impaired and the apparatus should be withdrawn from use and returned for checking and repair Make sure that only fuses with the required rated current and of the specified type are used for replacement The use of makeshift fuses and the short circuiting of fuse holders is prohibited Do not wet the instrument when cleaning it The following symbols are used on the instrument and in this manual Earth ground terminal mains supply OFF mains supply ON alternating current ac 2 OF direct current dc Service Handling Precautions Service work or calibration should only be carried
103. ol error amp for a reading of 0 003A 001A on the DMM Check that the CC LED is ON Increase voltage controls and current control to maximum Adjust load until the DMM reads 4 00A 0 02A Adjust VR7 107 measured output current until the Amps display matches the DMM reading Reduce load until the CC LED is ON Adjust VR4 104 maximum output current until the Amps display shows 4 05 Voltage Regulation Connect the DMM set to Volts across the output no load output ON Adjust voltage controls for a reading of 18 xxxx on the DMM note exact reading Connect load and adjust it to give an output current of 4 00A on the Amps display Adjust VR8 109 differential voltage gain until the external DMM matches the previous reading 3 3V 5V Output Versions 1 2 amp 3 Connect the DMM to the output With switch set to 3 3V position adjust VR1 on the main pcb for a reading of 3 300 Volts Switch to the 5V position and check output is between 4 905V and 5 095 Connect the DMM set to Amps and load in series across the output Adjust load until the C LIMIT LED comes ON Check that the DMM reads gt 5 Amps Connect the DMM set to Volts in parallel with the load across the output Adjust load until the C LIMIT LED just goes off Check that the DMM reads the same as in the 5V check above 0 025 Variable 1 5V to 5V AUX Output Version 4 Connect the DMM to the output Adjust Vser to minimum and check voltage is 1 0xxV to 1 4xxV A
104. out by skilled engineers using high quality test equipment Ifthe user is in any doubt as to his competence to carry out the work the instrument should be returned to the manufacturer or their agent overseas for the work to be carried out The tracks on the printed circuit boards are very fine and may lift if subjected to excessive heat Use only a miniature temperature controlled soldering iron and remove all solder with solder wick or suction before attempting to remove a component On the latest version 3 many devices are also miniature surface mounted components with very fine leads on small pitches These components must be removed and replaced with great care to avoid damage to the PCB It is essential that only the proper tools and soldering equipment for surface mount components are used Dismantling the instrument WARNING Disconnect the power supply from all voltage sources before it is opened for adjustment or repair Capacitors inside the supply may still be charged even if the supply has been disconnected from all voltage sources but will be safely discharged about 10 minutes after removing power If any adjustment or repair of the opened supply under voltage is inevitable it shall be carried out only be a skilled person who is aware of the hazard involved The incoming AC supply to the unit under test should be isolated for safety by means of a 1 1 isolation transformer of at least 700VA High voltages up to 400V are always present
105. pacitors C7 and common mode inductors L1 and L2 comprise an input filter which ensures that the supply meets both conducted emission and conducted immunity EMC requirements VDR1 clips mains spikes for component protection while R1 discharges the X capacitors after removal of the mains supply Pcb mounted fuse FS1 limits damage on boost stage or forward converter failure The front panel mains switch is connected via PJ4 The bridge rectifier BR1 has C11 and C12 connected across it to bypass noise signals and to snub reverse recovery transients in the bridge rectifier C89 further decouples the input filter and rectifier from the boost converter while R113 discharges 89 after removal of the mains supply RT1 is an which limits the initial inrush current into the boost stage output capacitor C88 Primary Boost stage Control circuit The primary boost stage control is by means of IC8 This contains all the processing circuitry to shape the current taken by the power supply from the mains supply to be sinusoidal and in phase with the voltage For a detailed description refer to the ST Power Factor Corrector Applications Manual Initial start up is R79 and R80 which charge the auxiliary storage capacitor C32 and HF bypass capacitor C13 with voltage limiting zener diode D66 When the voltage on C32 exceeds the under voltage lockout level of 16V IC8 starts up and supplies drive pulses to the gate of the boost MOSFET Q5 vi
106. riple only Voltage Voltage Accuracy Current Limit Output Terminals Output Protection Load Regulation Line Regulation Ripple amp Noise 20MHz bandwidth Transient Response Temperature Coefficient Status Indication GENERAL AC Input Power Consumption Operating Range Storage Range Environmental Safety EMC Size Weight METER SPECIFICATIONS Main Outputs Dual 3 digit meters with 14mm 0 56 LEDs Reading rate 4 Hz 100mV 10mA Voltage 0 3 of reading 1 digit Current 0 6 of reading 1 digit EX354T 5V or 3 3V selectable by front panel switch EX354Tv Variable lt 1 5V to gt 5V by front panel control EX354T 2 EX354Tv 0 3 1 digit 5A minimum 4mm terminals on 19mm 0 75 pitch Output will withstand up to 7V forward voltage Diode clamp reverse protection for currents up to 3A lt 0 5 for a 90 load change lt 0 1 for a 10 line voltage change Typically lt 2mV rms lt 10mV pk pk constant voltage mode Typically lt 200us to within 50mV of set level for 90 load change Typically lt 100ppm C Current limit lamp EX354T UNREG lamp EX354TV 110V 240 10 50 60 2 Installation Category II 500VA max 5 C to 40 C 20 to 80 RH 40 to 70 C Indoor use at altitudes up to 2000m Pollution Degree 2 Complies with EN61010 1 Complies with EN61326 260 x 160 x 320mm WxHxD 4 3kg Safety This power supply i
107. s C88 Another potential divider R81 R82 R98 monitors the voltage across 88 and feeds into 3 of IC8 which is the over voltage shutdown Pin 8 is the output of the multiplier and is the programming current for the internal current error amplifier This signal is taken to the mains supply side of the current sense resistor R83 R8 The other input of the current error amplifier is taken to the other side of R83 via R72 The current error amplifier thus compares the signal across the current sense resistor R83 with the programming current and adjusts the PWM drive to the boost MOSFET Q5 accordingly R73 and C86 with R72 form the compensation network around the current error amplifier When the mains supply falls below about 85Vrms the circuit comprising of long tail pair and Q10 and Q1 act on the soft start input of IC8 to curtail operation Boost Stage Q5 and boost inductor L3 raise the incoming full wave rectified sinusoidal mains voltage to a value some 20V higher than the peak of the maximum rms input voltage This is achieved by storing energy in L3 when Q5 is conducting and transferring it to C88 via boost diode D54 when Q5 is turned off When Q5 next turns on D54 is still conducting current To prevent large switch on losses in Q5 a delay inductor L9 is placed in series with Q5 This ensures that the current in the boost diode D54 is reduced at a gradual rate and the reverse recovery time is minimised at the same time
108. s a Safety Class instrument according to IEC classification and has been designed to meet the requirements of EN61010 1 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use It is an Installation Category II instrument intended for operation from a normal single phase supply This instrument has been tested in accordance with EN61010 1 and has been supplied in a safe condition This instruction manual contains some information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in a safe condition This instrument has been designed for indoor use in a Pollution Degree 2 environment in the temperature range 5 C to 40 C 20 80 RH non condensing It may occasionally be subjected to temperatures between 5 C and 10 C without degradation of its safety Do not operate while condensation is present Use of this instrument in a manner not specified by these instructions may impair the safety protection provided Do not operate the instrument outside its rated supply voltages or environmental range WARNING THIS INSTRUMENT MUST BE EARTHED Any interruption of the mains earth conductor inside or outside the instrument will make the instrument dangerous Intentional interruption is prohibited The protective action must not be negated by the use of an extension cord without a protective conductor When the instrument is connected to its supply terminals
109. se earthing and hence and safety performance may be impaired Model Changes as at August 2006 The EX354 has undergone a number of changes since its inception The three major versions of the Main pcb summarised here have separate Circuit Descriptions Component Layouts and Parts Lists The particular version can be identified by the part number printed on the Main pcb appropriate to each version see below In addition for each major version there have been a variety of minor component changes e g output chokes in a different mechanical format or alternative FETs but old and new parts for a particular component location are generally self evidently interchangeable In August 2006 the EX354Tv was introduced This uses the same Main pcb as previous but had different Control and third output pcbs to realize the variable 1 5V to 5V third output The four main versions are as follows Version 1 From April 1997 December 2000 230V only operation non PFC built on Main pcb part number 35515 1460 single sided Control pcb 35555 2600 Version 2 From December 200 October 2005 Universal operation PFC version built on 35515 1820 single sided Main pcb until January 2003 then 35555 3710 double sided Main pcb until October 2005 Control pcb unchanged from Version 1 Version 3 From October 2005 onwards Built on 3555 4550 Main pcb using surface mount components wherever possible Atthe same time the Control pcb also
110. th the introduction of the revised safety terminals see last Parts List Part Number 20030 0240 20030 0263 20030 0264 20030 0266 20037 0247 20037 0301 20037 0305 20037 0401 20038 9502 20038 9503 20062 9501 20063 0010 20065 0020 20134 9005 40 Description WASHER 4BA ZPST WASHER M3 ZPST WASHER M2 5 ZPST WASHER 4 ZPST WASHER 4BA SHK PROOF ZPST WASHER SHK PROOF ZPST WASHER 5 16 SHK PRF ZPST SOLDER TAG SHAKEPROOF 4BA WASHER M4 SPRING WASHER M3 5 SPRING SCREW No 6 X 3 4 RAISED CKHDPZ SCREW No 6 X 3 8 HDPZ ST AB SCREW 2 28 X 5 16 PLAS PNHDPZ SCREW 4BA X 1 4 PNHDPZ ZPST Position CONTROL PCB TO SPACER EARTH TERMINAL CONTROL PCB TO GROUND STANDOFFS BRACKET TO MOULDING CONTROL PCB EARTH TERMINAL SPACERS TO CONTROL PCB EARTH TERMINAL CHASSIS TO MAIN PCB SPACERS GROUND STANDOFFS GREY TERMINAL EARTH EARTH CONTROL TO OUTPUT TERMINALS HANDLE TO COVER HANDLE TO L BRACKET COVER TO CHASSIS CONTROL PCB amp L BRACKET TO MOULDING CONTROL TO OUTPUT TERMINALS MECHANICAL PARTS EX354D EX354T amp EX354Tv continued Part Number 20210 0102 20213 0040 20234 0024 20234 0027 20236 0010 20611 0050 20653 0204 20661 0282 20661 0278 20662 0580 22040 0030 22219 0090 22225 02221 22491 0120 22491 0270 22571 0675 22571 0685 22571 0696 22571 0691 22575 0207 22575 0209 29211 0110 31512 06801 33111 0220 33111 0280 33147 0120
111. uch that the output is approximately 5V with IC4A pin 3 at 3 3V IC43 provides current limit control when the voltage across the current sense resistors R44A R44B exceeds the reference level set by R58 R59 IC4B limits the gate drive to Q16 by acting on Q17 and simultaneously drives the constant current LED on the control pcb via R109 025 Auxiliary Supplies for Main Outputs Additional transformer windings TX2 D and TX2 E provide auxiliary power for Channel A and Channel B respectively D40 D41 C72 C73 and D42 D43 rectify smooth and zener regulate to provide 15V 018 022 L4 L5 and C23 C25 rectify and smooth the supply rail to linear regulator IC2 IC3 which provides 5V 013 014 C18 C19 and D20 023 rectify smooth and zener regulate to provide 5V Pcb Version 2 Component references when output specific are given for Channel A the left hand main output when viewed from the front with Channel B references shown in brackets Where supply rail and signal names are given these will be followed by A or C on the schematics for Channels A and C respectively The topology employed is a double ended forward converter with isolated secondary windings for each output which are regulated by means of a magamp pre regulator followed by MOSFET linear regulator Mains Input Filtering and Rectification The AC input is via a pcb mounted IEC plug X capacitors C1 C9 and C47 together with the Y ca
112. ud KB R104 C50 US BI e IBN 5 V 8115 R114 489 2K2 IDK 6 VE e DEE St R119 s LM358M BK R124 3 m V 536 08 8 BC843C y V IC5 C 2 V V LM358M 4 45 V EX354 5V 3 3V Output Version 3 55 V1
113. ued Part Number 23557 0693 23557 0816 23557 0820 23557 0950 23620 0236 23620 0247 23620 0263 23620 0264 23620 0268 23621 0314 23662 0207 23684 0016 23684 0020 23685 0013 25031 0060 25031 0080 25031 0100 25031 0110 25031 0140 25115 0910 25130 0207 25130 0914 25130 0916 25210 0050 25211 0301 25349 3500 25349 7580 25384 9001 25388 0211 25601 0490 25601 0510 25601 0610 27001 0060 27160 0009 27160 0013 27168 0040 44115 3041 28 Description 212 160V ELEC P2 5 CAP 1000U 50V ELEC RSH P7 5 CAP 10U 50V ELEC LOW ESR P2 4700 400V ELEC S I P10 1NOK 100V P E P5 CAP 220NK 63V P E P5 CAP 220NK 250V P E 368 SER P15 CAP 100NK 400V P E 368 SER P15 CAP 220NK 400V P E 468 SER P15 CAP 1U0K 400V P E P27 5 CAP 470PK 100V P C P5 CAP 220NM 250VAC X2 P22 5 UL CAP 1UM 250VAC X2 P P P27 5 UL CAP 330NK 160V 250V P P P15 DIO BYW100 200 DIO BYV32E DIO BAX12A DIO BYV26C DIO DUAL MURH860CT DIO 1N4007 B R DIO ZEN 15V W4 DIO ZEN 39V W4 DIO ZEN 3V3 W4 THYRISTOR 2N5064 RECTIFIER BRIDGE D20XB60 TRAN PNP MJE350 TRAN PNP ZTX758 TRAN PNP ZTX751 TRAN NPN ZTX651 TRAN MOSFET N CHAN 50V 60V TRAN MOSFET N CHAN 500V 20A TRAN MOSFET N CHAN IRFB11N50A OPTO COUPLER SFH615A 3 UL IC V REG 7805 TO220 IC V REG 7815 TO220 IC L4981A 20 PIN PCB ASSY SM MAIN Position C30 C33 C37 C15 C72 73 C93 C88 C3 C34 C4 C76 77 C51 C54 C14 C8 C89 C1 C9 C47 C16 C94 C119 D6 7 D18 19

EX354D/T/Tv Service Manual - Iss 3

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