Hammond Organ Service Manual - Early Models (A,B ... - Audiofanzine

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FILTER CD1iJH>4S£R5 MOTO^ Etal BACK ViEW or MAIN GENERATOR FILTER TRJ^P^^FoRHtfti Fig^rt 4, OUTPUT 1"t.R*îEHAi, OF TflftKSfOHWEa.S Fptg^StV ^J^_^ÂBE.Pi ^ ^ -. ^ ^ M Tr_ « ^ 4 Afl flF 2J_Sr M M 14 M *1 73 fl H ift J? .1 4fl gi
H CHORUS GENERATOR (Used in models BC, D, E, and G ) > o -I o SB The purpose of the chorus generator is to add a series of slightly sharp and 'slijjhtly flat tones to the true tones produced by the main generator. The resulting electrical wave contains a corrtpl^'x senes of undulations which enhance the pleasing effect of many tone qualities, notably string and full organ combinations. It should be noted that no chorus effect is produced on frequencies below 56. The frequencies covered by the chorus generator are nunibers 56 to 91 inclusive on the main generator. The difference in frequf^ncy between the main generator and either flat or sharp tone is .8% for frequencies 56 to 67 and .4% for frequencies 68 to 91. It is necessary that a lesser percentage of frequency difference be present in the higher register in order to avoid too rapid undulation. The chorus [generator assen^bly, like the main jênerator, has a drive shaft with twenty-four brass têars. Each gear drives a single asserribly consisting of two tone y^heels. The drive gears vary as to the number of teeth, and the tone wheels operate at twenty-four different speeds. This generator has forty -eight tone wheels, each with a separate magnet and pick-up coil. Of these tone wheels, twenty-four are single and twenty-four are double (see Figure 1). The double tone wheels consist of two discs wilh different nurribers of teeth mounted on one brass hub. The single wheels are electrically connected in pairs, each pair being BO connected as to have the sarne effect as one double wheel. Fijjure Z is a complete wiring diagram for connections between main and chorus jênerators, and Figure 3 is a back view of the chorus generator indicating the frequency number of each magnet.
Page 1 and 2: f ^
Page 3 and 4: SECTION I Mpdfli* BC, BV, BCV. B-2
Page 5 and 6: MODEL A - MODELS A & AS: (IS PRODUC
Page 7 and 8: U,S- SOVERWÊrjT PURCHASED EaUIPMEN
Page 9 and 10: CABINET : -1- \ MODEL ; A-100 A-101
Page 11 and 12: Mim MODEL A-20! (IN PRODUCTION OCTO
Page 13 and 14: MODEL C-40i (IN PRODUCTION JimE 193
Page 15 and 16: MODEL PR-40 MODEL QR-40 MODEL PR-40
Page 17 and 18: II THEORY OF OPERATION The console
Page 19 and 20: THEORY OF OPERATION The console of
Page 21 and 22: HARMONIC DRAWBARS Each console has
Page 23 and 24: TREMULANT shift, lilting tablets [F
Page 25 and 26: speakers . POWER AMPLIFIER A- 100 A
Page 27 and 28: REVE KBEIL^TION Reverberation is th
Page 29 and 30: for that purpose , C,CV . D,DV.E,G
Page 31: Il ^^^~
Page 35 and 36: Associated with each tone wheel is
Page 37: 91 Frequency Generator with complex
Page 41 and 42: "S TART^' SWITCH BROWN , BI^CK TEL-
Page 43 and 44: When a p!ayinp key is pressed, its
Page 45 and 46: in PEDAL SWITCH ASSEMBLY Figure 5 P
Page 47 and 48: (A ta 3S BE5ii70R P*MEL Ifcth !0'h
Page 49 and 50: LiJ I on ACTUATOR FOR ONE KEY TUNIN
Page 51 and 52: Pedal Keyboard Pedal keys are set a
Page 53 and 54: is In Pedal Busbar Shifters Pedal s
Page 55 and 56: On the front edge of each channel o
Page 57 and 58: MODEL A CONSOLES SERIAL NUMBERED 'O
Page 59 and 60: MATCH. TRANS. BLACK PREAMP. RED CON
Page 61 and 62: Of PREAMPLIFIER AMPLIFIER AMPLiFIE*
Page 63 and 64: 'o F f'oR *CH RU S*CONTACT
Page 65 and 66: I Put u^ MFOa-TbOPv^ VL MA Ck ViBBA
Page 67 and 68: manual as long as percussion tablet
Page 69 and 70: FIG. 1 is UPPER E PIN LEVER DRIVING
Page 71 and 72: MOVING THE FLUID TYPE UNIT The reve
Page 73 and 74: INSTALLATION OF PR AKD QR TONE CABI
Page 75 and 76: Note: St*.ps 3 and 4 apply only to
Page 77 and 78: CC £ ^
Page 79 and 80: 2. Replace amplifier and place a so
Page 82 and 83: ^ k i ^
Page 84 and 85: a. 1^ Anarti^sv tfOiv aiN 30 :iNcu.
Page 86 and 87: -.Tui-*js?v aoivaiNiD 3NOi 3-7
Page 88 and 89:
3-9
Page 90 and 91:
3-n
Page 92 and 93:
iL D O o z O u z 3 O O 2O < < : < I
Page 94 and 95:
3-15
Page 96 and 97:
3-17
Page 98 and 99:
2,000 4,000 7h5QO ?^ J.OOO 300,000
Page 100 and 101:
PEDAL SOLO UNITS CONCERT MODEL CONS
Page 102 and 103:
Volume Control (b) The volume knob
Page 104 and 105:
in - 2 J o z o u 53 5 "-3 i^ u i St
Page 106 and 107:
Q > -T * h^ ' 4h— t- i § ^l,\ '
Page 108 and 109:
of PDMFn Tl flUMT VlfVJ or fHA^^^ P
Page 110 and 111:
ELECTPICAL PARTS LIST FOR PEDAL SOL
Page 112 and 113:
PEDAL SOlO on \ le' s' rK^;- c^/; ^
Page 114 and 115:
of ISFDT HEATtfLS r 0-- ft C? 05/40
Page 116 and 117:
.1 ^;ECi- 2.3 ^ «60 H£>TER3 Sm.(i
Page 118 and 119:
-J o at t- J O a: H lirpuT dJl-i 11
Page 120 and 121:
"""/'iftni'ii t I PD««r [Jib ^D-^
Page 122 and 123:
"TO—^m -orr--, 1 oi a 33 ^ £ A
Page 124 and 125:
3-45
Page 126 and 127:
T4 ^TfT^ z*^v-
Page 128 and 129:
10^ WIE.1N Pa«HEP AT*D TOP ViLVI o
Page 130 and 131:
J o: IuJJJJJl> J T /^ ;( r-V R 4 ^8
Page 132:
It > L I> i^ Ef IP fE 0^ > t4 > in
Page 135 and 136:
A 591 ]l' Trrmnrrrj ru "^ ÂÂ^ (0
Page 137 and 138:
- pO
Page 139 and 140:
3-60
Page 141 and 142:
CKG. Q C/> n * < C S^S^ oca.z 3-62
Page 143 and 144:
J I- Ol I 1 IS h o o o o t < J U 5
Page 145 and 146:
3-66
Page 147 and 148:
ft II OL I 3-68
Page 149 and 150:
3-70 A"^Hr^"Js^Y aCivti3 43^ SfÔi.
Page 151 and 152:
Figure 1-5. Tone Generator 3-72
Page 153 and 154:
3-74
Page 155 and 156:
TABLE III - FREQUENCY NUMBERS ASSIG
Page 157 and 158:
TABLE 111 - FREQUENCY NUMBERS ASSIG
Page 159 and 160:
Do not twist it, is b. Strike the p
Page 161 and 162:
REPAIR HAMMOND ORGAN COMPANY
Page 163 and 164:
SCANNER REMOVAL. DISASSEMBLY AND RE
Page 165 and 166:
3-86
Page 167 and 168:
O Q * J imI -J
Page 169 and 170:
4-8. ADJUSTMENT OF PERCUSSION CUT-
Page 171 and 172:
4 AND 64 16 AND BLANK 4 AND 64 16 A
Page 173 and 174:
PINION LUBRICATING WICKS Figure 5
Page 175 and 176:
ROTOR CONTACT PIN A-BRUSH COVER REM
Page 177 and 178:
is is sent li> roni wires to termin
Page 179 and 180:
J IE Lit lU u 3 3 fTTTTTll 1^ ft LU
Page 181 and 182:
cable passes to the tone generator)
Page 183 and 184:
5-14
Page 185:
THIS SECTION IS DIVIDED INTO THREE
Page 188 and 189:
I WS:C . T . ow-oie29q i rtlSIi; PA
Page 190 and 191:
%- 2 \- 3 3- 7 3- B J- 9 3-10 3-11
Page 192 and 193:
5- 4 KE* COMB ASSE^ffiLt (MANUAL HE
Page 194 and 195:
4- 5" , »^ .is '""'* Wf^m
Page 196 and 197:
PRESET P4NEL ASSEMBLY IJJÔOOOOl t
Page 198 and 199:
EXPRES51QN PEBAL *5StJfflLT ^ , l2]
Page 200:
POUER SUPPtT ASSErtBLT . . , . , 13
Page 203 and 204:
LEVELING TABS REVtPBEPfiTrON UNTT A
Page 205 and 206:
in- I**- I I Ift- - IH- } (H- - IH-
Page 207 and 208:
CONCERT MODELS RT, RT-2, AND RT-3 H
Page 209 and 210:
JVriU-M Jif-AJ< VIK'A Uk' i.tiNSl.'
Page 211 and 212:
© PREAMPLIFIER NOTE: PARTS INFORMA
Page 213 and 214:
5 J PEDAL SOLO GENERATOR DlOO RT SE
Page 215:
-32 TONE CABINET CROSS REFERENCE MO
Page 218 and 219:
(TJ) PLUGS AND RECEPTACLES 1. 5 PIN
Page 220:
HOOO-000495 11/87 5C printed in u.s
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