Hammond Organ B3-C3 Service Manual
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C17 TO 680PF 24-90PF "VOLUME" R4 C2 RADIO-PHONO TABLET 1.8M 39PF E F EXPRESSION C22 CONTROL R5 R9 C6 C15 C16 C23 C24 10M 820K 30PF 51PF .033 145V C18 C20 60PF/SEC 140V T3 G 220PF 220PF TONE NON-VIB 12AX7A 12AX7A TO TONE V1 .033 82PF R40 BN CHANNEL A R6 1 V4A 6 V4B 6 CABINET INPUT 47K 6AU6A R29 R37 .3M V3B C5 2 330K 7 R36 7 12BH7A R34 270K G 100PF .01 R30 R32 330K 1 15M R39 R3 C3 R10 R27 3 8 8 3.9M 1.8M 1.8M R35 12V 270K 5 130V 1.8M +280 330K +290 3.3M R41 7 R31 R33 +280 R38 1200 68K 68K 100K C26 +1.7 (V2) +1.7V (V2) 390K R42 30/25 62 R8 470K +1.7 (V2) INPUT FROM C4 R7 VIBRATO SCANNER D C19 C21 C25 INPUT FROM .0022 .001 .001 MATCHING XFMRS +280 C THRU VIBRATO 2.2M OUTPUT TO TABLETS .33 VIBRATO LINE C11 4.7M C7 1.0 TO HTRS R97 24PF .0047 T7 R13 "BL" 335V +205 C13 C35 R63 4500 R98 10M R15 150PF 390K R63 R18 C35 C60 7500 R14 2.7M 10M 12BH7A 50/300 R25 390PF 390K 117VAC V3A 1 C34 C33 +290 100 .0033 +37 VIBRATO .001 60 HZ 1 4 R94 CHANNEL B 47K 2 C34 R62 900 INPUT R16 220K 6 3 R91 R99 V2 .001 7 375V 4.7K 180 3 +290 +280 100PF 1 6AU6A "GY" V8 270K C8 C12 R62 C33 R95 R96 +33 R12 .0047 C32 100K .0022 6X4 C56 5 R21 390PF 40/450 7 R22 4.7K 4.7K R100 R101 1M 820 R19 C57 C58 C56 2.7K 2.7K 62 470K THESE COMPONENTS GO BETWEEN 10/350 95V POINTS "P" AND "D" IN AO-28-1 40/400 30/350 +1.7V R20 AMPLIFIERS (WITH NO CODE 30/25 2.2M LETTER ONLY) INSTEAD OF R17 R23 R24 THOSE SHOWN AT LEFT C9 22K 1.2K 22K TOP VIEW C10 .33 +280 T5 P C56 C9,C26 (* SEE NOTE) 12AU7A C57 T3 C59,C60 V7A T4 C28 1 C58 R48 R52 * R61 SELECT FOR T5 2 CHANNEL BALANCE 39K (MOUNTED ON "P" TERMINAL) T1 EXPRES- 470K .047 V5 47K SION 6C4 R53* * 3 T6 1 C32 T6 CONTROL C31 47K .0082 V3 R47 .33 V8 V4 V1 V2 V6 V5 V7 T4 6 +205 +205 +33 47K C29 H 7 R60 100PF R54* +37 8 30K PERCUSSION 47K CHANNEL 7 PERCUSSION INPUT C30 CUTOFF R49 V7B GY BL BN G G F EC P D AB LNKMJH 6 2.2K 12AU7A R58 25/25 V6 4.7M 6C4 N R50 1 R57 TO SIDE VIEW 7 PERCUSSSION J R55 L SWITCH TO 22 6 1.5M NOTE: PERCUSSION 82K SWITCH M R52,R53,R54,C32 IN MODEL B3, C3, RT3 R51 25V AO-28-1 AMPLIFIERS K (WITH NO CODE LETTER ONLY) Title 4.7K R56 +33 PREAMPLIFIER TYPE AO-28 22K Size Document Number REV B --- --- --- 1.0 Date: April 20, 1995 Sheet 1 of 1 VIBRATO GREAT OFF SOFT VOLUME T1 TYPICAL GROUP OF LOWER PEDAL TYPICAL GROUP OF UPPER R4 C2 R9 MATCHING (GREAT) MANUAL DRAWBARS DRAWBARS (SWELL) MANUAL DRAWBARS T2 ON R10 - SELECT AT TEST NORMAL TRANSFORMER MATCHING TO BALANCE CHANNELS (LOWER AND PEDAL) TRANSFORMER VIBRATO 1.8M 39PF 820K UPPER SWELL OFF R10 C17 E R5 3.9M F R29 680PF 24-90PF C24 ON 145V R2 10M C5 +280V RADIO-PHONO C1 A V1 .01 330K C22 82PF 1M 470PF R6 6AU6 C8 130V C16 EXPRESSION C23 R37 100PF 1 5 30PF CONTROL .033 47K C15 .033 270K R8 60PF/SEC 140V R39 G R3 C3 470K C18 C20 285V T3 R1 270K 7 51PF 12AX7A TONE 3.9M 1 220PF 220PF 6 330K V3B V4B R40 12BH7A BN 6 R28 V4A R38 6 2 3 5 62 2 12AX7 7 R36 300K R7 390K 7 60V 270K 330K G +1.7V 3 R30 R32 R34 8 (FROM V2) 2.2M R27 15M R35 8 +290V C4 +280V 1.8M 3.3M 1.8M 1.8M +280V 12V .33 +1.7V R41 (FROM V2) +1.7V 100K (FROM V2) 1200 C26 B C7 R13 C11 R31 R33 R42 30/25 68K 68K 24PF 4.7M C25 .0047 .001 R15 R25 R14 C19 C21 LOWER MANUAL BUSBARS UPPER MANUAL +290V .0022 .001 PRESET PANEL 10M 2.7M 100 8 V2 6 V3B 7 R16 C12 12BH7 6 6AU6 130V 7 5 1 5 4 470K .0047 3 C8 8 C13 2 R12 .0001 100V 1 270K 7 R21 D 0 R19 1M 1.0 470K R22 LOWER MANUAL 62 C PRESET PANEL R17 R20 820 1.2K 2.2M PERCUSSION UPPER MANUAL C9 60V 95V SIGNAL BUSBARS 30/25 6 C10 +280V R23 R24 2 3 .33 22K 22K +1.7V VIBRATO 5 (TO V1,V4) SWITCH (GEN 49-91) CLOSED CLOSED CLOSED CLOSED 91 IN V1,V2,V3 IN V1/C1 IN V2/C2 IN V3/C3 C35 C34 150PF R44 22K SCANNER .001 R63 200V C32 V7A R62 390K 390PF C33 1 100K C28 12AU7 .0033 R48 T4 T5 2 1 H PERCUSSION 470K .047 V5 +37V R47 6C4 3 T6 OFF 1 +205 7 4 47K 6 +205 C31 (GEN 44-48) ON THIRD C29 44 R61 7 .33 33K SECOND 100PF 8 85V 7 C30 R49 V7B 6 +33V 2.2K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 25/25 12AU7 200V R58 L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15 L16 L17 L18 J R50 PERCUSSION R60 4.7M CUTOFF 30K 22 L R65 R67 R69 R71 R73 R75 (GEN 1-43) R57 V6 27K 56K 1 6C4 39K 33K 18K 12K K R51 1.5M PERC. C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 25V 1 M DECAY R77 GENERATOR 7 15K OUTPUT 4.7K R66 C37 R68 C38 R70 C39 R72 C40 R74 C41 R76 TERMINALS PERCUSSION 6 SLOW .004 .004 .004 .004 .004 .004 .004 .004 .004 .004 .004 .004 .001 VOLUME R55 82K R59 68K .004 150K .004 150K .004 180K .004 180K .004 180K SOFT R56 22K FAST 120K R46 +33V 12K NORMAL VIBRATO DELAY LINE TONE NOTES: GENERATOR R81 10 R84 5 NINE CONTACTS AND CONNECTIONS R97 1 UNDER "A#" ADJUST KEY ARE OFF 335V +205V SAME AS "B" EXCEPT THAT T5 RUN THESE THREE DRAWBAR WIRES C9,C26 SWITCH 4500 GO DIRECTLY TO KEY CONTACTS. C56 ON BL T7 R98 C57 T3 C59,C60 R82 47 R85 5 C60 7500 C58 T4 R80 50/300 2 NINE CONTACTS UNDER TYPICAL 10 START 6.0V PLAYING KEY. T1 8 CONTACTS UNDER SWITCH HEATERS +290V +37V EXPRES- TOP VIEW TYPICAL PEDAL KEY R94 SION L20 R83 470 R86 20 3 NINE CONTACTS AND CONNECTIONS T6 R87 R99 UNDER "B" ADJUST KEY. CONTROL 4.7K V3 TO GENERATOR R88 117VAC 1 4 +280V 180 V8 V4 V1 V2 V6 V5 V7 TERMINALS 600 250 50/60HZ 900 R95 4 PRESET PERCUSSION SWITCH (SEE PEDAL (1000) 6 3 R91 R96 UNDER "B" ADJUST KEY ONLY. WIRING CHART) HEATER 7 375V +33V (IF USED) 4.7K 4.7K R100 R101 NINE CONTACTS AND CONNECTIONS V8 5 2.7K 2.7K UNDER TYPICAL PRESET KEY. GY 6X4 C56 C57 C58 C56 40/450 30/350 10/350 TO GENERATOR TERMINALS STARTING SYNCHRONOUS 40/400 6 (SEE MANUAL WIRING CHART) BUSBARS MOTOR MOTOR 340VRMS PINS 1,6 Title TO GND R61 SELECTED AT TEST 7 TO BALANCE THE CHANNELS. B3/C3 SCHEMATIC PEDAL SWITCH Size Document Number REV E --- ---- --- 1.0 Date: December 11, 1995 Sheet 1 of 1 GY GY VI VI BL BL GN GN YL YL OR OR RD RD BN BN BK BK A G# G F# F E D# D C# A G# G F# F E D# D C# GY GY W G V B G Y O R B W G V B G Y O R B R B W G V B G Y O R B W G V B G Y O R B VI VI H Y I L N L R D N H Y I L N L R D N D N H Y I L N L R D N H Y I L Y L R D N BL BL GN GN YL YL OR OR RESISTOR PANEL RD RD AND PEDAL FILTER ON BACK OF RESISTOR PANEL BN BN MANUAL ASSEMBLY BK BK RUN SWITCH START SWITCH R83 W G Y BK PEDAL FILTER H N L R82 1 O O F N OFF R80 F ON L20 R86 R85 R84 R81 BN BK YL BN BK BK BL YL OR BN BK RD LINE PANEL MATCHING XFMR T1 (LOWER MANUAL) T2 (UPPER MANUAL) VI GY WH WH R87 WH LOWER MANUAL BL BK BK Y B (BL) 91 13 VI L N GN BL YL RD RD OR WH YL BN RD BN GY GN RD STARTING SYNC MOTOR GY MOTOR OR BK BL PRESET C1 SWITCH BK R1 BK YL GN R2 UPPER MANUAL BK BK VIBRATO SCANNER 8 4 3 7 6 1 65938 72 15 44 27 61 485 3 86 294532761258437617953872164427615853872154 32 76 138538628543276114 5 2 0 8 6 8 4053 13 19 70 86 46 2 83 19 17586424063197951642420819757394202086 97 53 51720806475313 9 YL BL BN TONE GENERATOR YL GN WH YL GN GN RD RD R59 R46 BK BL WH YL GN Y O RB L R DN68 PEDAL SWITCH FREQUENCY NUMBERS IN CONSECUTIVE ORDER 1 PERCUSSION SWITCH (REAR VIEW, COVER REMOVED) VIBRATO SWITCH TERMINALS ON SCANNER TERMINAL NUMBERS DRAWBAR BASE COLOR CODE 8 7 6 5 4 3 2 8 7 6 5 4 3 2 8 7 6 5 4 3 2 GN YL YL BK BLACK BN BROWN R44 RD RED OR ORANGE 1 1 1 1 1 9 6 1 1 1 1 9 7 5 1 1 9 8 7 6 5 YL GN YL YELLOW 8 7 6 5 2 5 4 3 1 1 0 GN GREEN BL RD GN BL BLUE VIBRATO LINE TERMINAL NUMBERS VI VIOLET JACK TO GY GREY AC LINE TONE CABINET WH WHITE BN CONTROL PANEL B BARE (REAR VIEW, COVER REMOVED) GY BL BN Y Y B R B G BL GGF EC L L L D N N GN BK YL GN BR GY B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 G B B KD NL N GY BK RD OUTLET BOX Y L N P D A B L N K M J H PREAMP VIBRATO LINE BOX Title BN WIRING DIAGRAM - HAMMOND B3 OR C3 Size Document Number REV EB Date: December 12, 1995 Sheet 1 of 1.