Hammond X-5 User manual

rSERVICE MANUAL
HAMMOND X-5 COMBO ORGAN
is of Ha
truly portable organ that embodies
mond tonebar organs. It's asynthes
sonly 163 lbs.
4-note keyboards with overhang keys,
epedalboard.
armonic tonebars for upper keyboard,
harmonic tonebars for lower keyboard.
rfori
•Vibrato: 3degrees and off.
•Reverberation: 3degrees and off.
•4presets plus upper and lower tonebar positions.
•Synthesis touch -response percussion.
•Fast and Slow Decay.
•Variable speed repeat/reiteration on percussive voices:
•Acoustic tremolo speaker outlet (Leslie® 910), plus two-speed on/off
control tabs.
•16' and 8' pedal tab.
•Two String Bass tabs: 3decay times, plus Mute tab.
•Brilliance Knob, continually variable.
•Volume control knob.
•Input jack for external instruments.
•Line-out jack for other amplifiers.
•External speaker jack.
SPECIFICATIONS: Weight: 165 lbs. •Power Source: 60 cycle AC 120 V. •Dimensions: 44M" W.,
•Accessories: Legs.
HO-1296 3.5M

PRODUCT SERVICE
For product service, contact nearest authorized Hammond Service Center or write to: Manager,
Product Service, Hammond Organ Company, 4200 West Diversey Avenue, Chicago, Illinois 60639.
Parts are also Available by Contacting Product Service as Mentioned Above.
IMPORTANT:
Always supply model designation and serial number when writing.

TABLE OF CONTENTS
SECTION l-HOW THE ORGAN OPERATES
1-1 GENERAL 1-1
1-2 CABINETRY 1-1
1-3 TONE SOURCE 1-1
1-4 MANUAL 1-1
1-5 TONE BARS 1-1
1-6 PRESET OR TAB VOICING 1-1
1-7 PERCUSSION 1-1
1-8 REPEAT 1-1
1-9 PEDALS 1-2
1-10 VIBRATO 1-2
1-11 VOLUME 1-2
1-12 BRILLIANCE 1-2
1-13 EXPRESSION PEDAL 1-2
1-14 REVERBERATION 1-2
1-15 EXTERNAL INPUT 1-2
1-16 REMOTE TONE CABINET 1-2
1-17 AMPLIFIER 1-2
SECTION II -DISASSEMBLY AND MAINTENANCE
2-1 GENERAL 2-1
2-2 TOP PANEL 2-1
2-3 UPPER MANUAL ASSEMBLY 2-1
2-4 END BLOCKS- LOWER MANUAL 2-1
2-5 LOWER MANUAL ASSEMBLY 2-1
2-6 TONE BAR ASSEMBLY 2-1
2-7 POWER SWITCH AND UPPER RIGHT END BLOCK 2-1
2-8 END BLOCK POTENTIOMETER 2-1
2-9 ROCKER TAB (REMOVAL) 2-1
2-10 PRINTED WIRING BOARDS 2-2
2-11 UPPER OR LOWER MANUAL KEYS 2-2
2-12 POWER SUPPLY 2-2
2-13 REVERB UNIT ACCESS 2-2
2-14 EXPRESSION PEDAL 2-2
2-15 LOWER SECTION COVER 2-2
2-16 POWER SUPPLY (LOWER SECTION) 2-2
2-17 PEDAL KEY BOARD ASSEMBLY 2-2
MAINTENANCE AND SERVICE HINTS
2-18 TEST AND ADJUSTMENT PROCEDURE 2-4 thru 2-10
SECTION III -DIAGRAM AND TEXT
GENERAL 3-1

LIST OF ILLUSTRATIONS
Figure
3-1 LOGIC DIAGRAM (2-1 )3- 2
3-2 LOGIC DIAGRAM (2-2) 3-3
3-3 DIVIDER BOARD LAYOUT &R.C. LIST 3-4
(229-20316)
3-4 DIVIDER BOARD THEORY 3-5
(229-20316)
3-5 GATE AND PERCUSSION AMP BOARD 3-6
LAYOUT AND THEORY (219-04312)
3-6 PRE. AND REVERB AMP BOARD 3-7
LAYOUT AND THEORY (219-51306)
3-7 PEDAL BOARD LAYOUT AND THEORY 3-8
(223-17311)
3-8 MIXTONE BOARD LAYOUT AND THEORY 3-9
(232-02311)
3-9 POWER SUPPLY BOARD LAYOUT AND THEORY 3-10
(224-0531 1
)
3-10 30W POWER AMPLIFIER MODULE LAYOUT AND THEORY
(218-02311) 31
1
3-11 MDD GENERATOR-TWO PACAGE SYSTEM VIBRATOABLE
LAYOUT AND THEORY (228-19312) 3-12
3-12 MDD BUFFER BOARD LAYOUT AND THEORY 3-13
[223-35341
)
SECTION IV -ILLUSTRATION PARTS LIST
4-1 INDEX 4-1

SECTION h
HOW THE ORGAN OPERATES
X-5 -18050K
GENERAL PERFORMANCE DESCRIPTION
1-1 GENERAL
This section contain abrief description of the
various sections of the .instrument.
1-2 CABINETRY
The metal frame and wood panels-coated with
vinyl leather and CHS- form the case work.
Case has ametal handle for earring and a
removable key cover.
1-3 TONE SOURCE
The X-5 (1805QK) utilizes the single master
oscillator with the muitiderivative divider (MDD1
system. The twelve (12) I.C.'s mounted on the
229-20316 (DV-4B) Divider Generator Board
provide the division of outputs and provide the
sine wave tones -seventy nine (79) tones- made
use of by the instrument.
1-4 MANUAL
The 18050K uses two (2) 44 note Manual that
Upper Manual has 10 contacts under each key.
The Manuals provide means of switching signals
from 229-20316 Generator Board and keying
voltage to the 219-04312 Gate &Percussion
Board. The lowest one of these contacts is used
for switching voltage for Gate &Percussion, and
Others are used for switching the signal directly.
1-5 TONE BARS
Three Groups of Tone Bars complement the
Upper Manual, Pedal and Lower Manual. They
carry the footage markings and vary loudness.
1-6 PRESETS OR TAB VOICING
The three (3) Presets Tabs may bring in pre-set
tones instead of the setting of the upper Tone
Bars, And the One (1) Preset Tab may bring in
those of lower Tone Bars.
They may be used individually. The presets have
the following Tone Bar structure.
Lower Tone Bars
Preset Ensemble 068666 444
Upper Tone Bars
String 008888 666
FullTibias 806808 006
Theater Brass 848868 666
Depression of either Preset Tab disconnects the
setting of the Tone Bars, and all Tabs turn to
"Off" position and restore the Tone Bars.
On Upper Presets, the right-hand Tab has priority
over the left-hand Tabs. The Tabs used are of the
current switch type. The Preset Tabs are located
on the lower left-hand End Block Assembly.
The End Block also contains other Tabs whose
functions are the following: Percussion [Second
Harmonic, Third Harmonic, Decay, Repeat),
Vibrato and Leslie (Acoustic-Tremolo).
PERCUSSION
Percussion Tones are switched on by the Tabs,
which are Second Harmonic and Third Harmonic.
Each footage of the pitch corresponds to 4' and
2-2/3' of Tone Bars. Percussion affects all upper
Tone Bar setting, but not Preset Tones. It has
two decay times, approximately 1.5 seconds
(Slow) and 80 msec. (Fast).
REPEAT
The same Percussion gate can be activated by a
reiteration or repeat Oscillator, and affect the
same Percussions. The Oscillator rate is variable
from 13 times/10 seconds to 500 msec. The
Repeat Rate control is located on the lower
right-hand End Block Assembly. The End Block
also contains other Tabs and controls whose
functions are the following: Pedal, String Bass,
Mute, Reverb, Volume, and Brilliance.
1-1

1-9 PEDALS
A13 note Spinet Pedal of the Block Module
Design is used. The keying contacts are used the
Rocker type, with the middle contact used for
Common. Aseries of latching D.C. gates
determines the desired bass note. These contacts
are wired High-Note Select. The latching Keyer
Gates hold for at least two (2} seconds, but
release instantly with the next pedal depressed.
The selected output is then amplified to produce
the 8' bass note and then frequency-divided one
(1) time in F-F circuit to produce the 16' bass
note. An output gate controls the Pedal Sustain
envelope. The sustain decay time is selected by
String Bass Tabs, those its decay times are follows:
Tab Decay Time
String Bass I350 msec.
String Bass II 700 msec.
String Bass 111(1 +11) 1.5 sec.
The Bass Note is selected 8' and 16' by Pedal Tab.
The Mute Tab affects all Bass Tones.
1-10 VIBRATO
AMaster Oscillator Vibrato offers three (3)
widths at one speed that affects all voices.
This rate is 6.6 ±0.2 Hertz. Vibrato II is wider
than I, and the two Tabs are additive, so the
Vibrato is widest when both on.
1-11 VOLUME
This Knob controls the overall volume of the
organ soft to loud, and its variable range is about
30 dB.
1-12 BRILLIANCE
This Knob controls the overall tone of the organ
soft to bright, then gradually attains aslope of
6dB/octave and alters the response about 16 dB
at 3000 Hz.
1-13 EXPRESSION PEDAL
The assembly is made of steel frame, utilizing a
single channel.
The variable range is about 22 dB at minimum
position.
1-14 REVERBERATION
Three {3) degrees of Reverb, are available, which
affects all organ tones.
1-15 EXT. INPUT
An input suitable for other Signal-generating
devices is provided and located under the right-
hand Lower End Block of the cabinet.
1-16 REMOTE TONE CABINET
Ajack is provided suitable for an 8 ohm Speaker.
Asocket is provided suitable for aLeslie
910 Tone Cabinet. The signals are taken from
the organ output following the Leslie Selector
Tabs, and On/Off, Fast/Slow control Tabs are
coupled through the Standard Cable to the Tone
Cabinet. Jack and socket are located on amplifier
in the Pedal Cabinet.
1-17 AMPLIFIER
Asingle channel 30 Watt Block Module Design is
provided and located in the Pedal Unit Assembly.

SECTION II.
DISASSEMBLY 1M>
2-1 GENERAL
This section contains instructions for removal of
specific assemblies of the organ. Step 2-2 thru
2-13 provide disassembly procedures for the
Upper Section (Manual Keyboard) of the organ.
Steps 2-14 thru 2-17 provide disassembly
procedures for the Lower Section of the organ.
The removal of some sub-assemblies and un-
plugging connectors or unsoldering is obvious.
These will not be discussed.
For reassembly, use reverse procedures.
UPPER SECTION
2-2 TOP PANEL
a) Two (2) bronze screws (614" long) located
under Upper Section must be removed FIRST.
(Note —See Figure 2-1 for location).
b) Near top and center of each side of Upper
Section remove bronze screw.
c) From front of top panel, lifting evenly, raise
top to swing up position.
2-3 UPPER MANUAL ASSEMBLY
a) See figure 2-1 for location -Remove six (6)
1" long bronze screws from under side of
Upper Section.
b) Raise manual to swing up position. {Do not
lift by keys).
2-4 END BLOCKS -LOWER MANUAL
a) Remove two (2) phillips screws from rear of
each End Block Assembly.
b) Carefully lift up and avoid marring or scratch-
ing.
2-5 LOWER MANUAL ASSEMBLY
a) Lower Manual End Blocks should be removed
first to avoid damage to case or other assemblies.
b) See Figure 2-1 for location. Remove four (4)
1" long bronze screws from under side and
toward front of Upper Section.
c) Carefully, Manuai can be placed in up right
position. (Do not lift by keys!.
2-6 TONE BAR ASSEMBLY
a) Unplug Upper and Lower tone bar connectors
for T.G-15 (B) PWB assembly located under
Upper Manual Assembly.
b) Remove self tapping screws mounting Tone
Bars to Upper Manual Assembly.
2-7 POWER SWITCH AND UPPER MANUAL
RIGHT HAND END BLOCK.
a) Follow steps 2-2 thru 2-3.
b) Remove End Block, by removing one (1)
screw at rear, top of End Block. Screw located
under felt.
c) Raise manual and from under End Block
remove screw.
d) Between Front Strip, remove small screw
fastening strip to End Block. Lift up End Block.
e) From under side of End Block, remove two (s)
screws fastening cover to switch. Remove cover.
f) To remove power switch -after End Block is
loose from Manuai, remove two (2) black screws
from top of End Block. Switch now can be
removed from under side of End Block.
Reassemble in reverse procedure.
2-8 TO REMOVE END BLOCK POTENTIOMETERS
a) Follow step 2-2 thru 2-5.
b) Remove knob of potentiometer. (Volume,
Brilliance, or Repeat), by loosening small set
screw in knob.
c) Remove End Block by removing two (2}
screws top rear of End Block. Lift Block.
d) Remove hex nut securing potentiometer to
End Block, Potentiometer can be removed from
bottom side of Assembly.
2-9 ROCKER TABS (REMOVAL)
a! Proceed as stated in Stepes 2-2 thru 2-4.
b) From under side of End Block, remove top
and bottom screw of associated Rocker Tab
Assembly. Rocker Tab will lift out.
2-
1

DISASSEMBLY CONTINUED LOWER SECTION
2-10 PRINTED WIRING BOARDS (REMOVAL)
a) The removal of PWB Assemblies is quite
obvious and will not be necessary to describe.
2-11 TO REPLACE UPPER OR LOWER MANUAL
KEYS.
a) Follow Steps 2-2 thru 2-3. Upper Manual and
thru 2-5 Lower Manual.
b) Remove several locking "S" Springs holding
plastic covered rod in area of key or keys to be
replaced.
c) Remove key spring from rear of key channel.
d) Lift rear of key channel slightly and in a
forward motion carefully remove key and channel
assembly from manual. In the removal of sharp
(black) keys, it will be necessary to remove
neighboring keys. Reassemble in reverse pro-
cedure.
c) NOTE -Key contact adjustment can be made
by turning most forward screw on key and
channel assembly (in or out) for key depth.
2-12 POWER SUPPLY
a) Follow steps 2-2 thru 2-3.
b) Remove six (6) screws fastening cover above
power supply assembly -Remove cover.
c) From under side, right rear of Upper Section
remove four (4) screws. See Figure 2-1 for
location.
d) Carefully unplug and lift assembly out.
2-14 EXPRESSION PEDAL ASSEMBLY
a) Remove four I
Assembly to Lower
b) Lift out.
c) To remove pedal
mat of ped: be r
fastening base of
the metal base. Rubber
>ved by lifting edges of
.. M:li lift a
d) With mat removed, remove four (4) screws
holding metal pedal to Base Section and separate.
Reassembly in reverse procedure.
2-15 TO REMOVE LOWER SECTION COVER
a) From under side of Lower Section. Remove
ten (10) phillips screws.
b) Cover will lift off.
2-16 POWER SUPPLY ASSEMBLY
a) Remove cover as stated in Step 2-1 5.
b) Remove four (4) nuts fastening amp to
wood base.
2-17 PEDAL KEYBOARD ASSEMBLY
a) Remove six (6) nuts and washers mountirlg
keyboard assembly to wood base,
bi Pedal assembly will lift off.
c) Contact switch assemblies can be removed by
loosening screws at each end of switch module
and slide away from screw and lift up.
Reassemble in reverse procedure.
2-13 ACCESS TO REVERB UNIT
a) Follow Steps 2-2 thru 2-3.
b) Remove six (6) screws fastening cover above
power supply. Remove cover.
c) Remove two (2) screws and fasteners hold
EF-12 PWB.
d) Remove four (4) screws fastening MG-4 PWB
to hinged panel. Carefully unplug and remove.
e) Remove four (4) nuts and washers from rear
of swing panel.
f) Carefully raise panel and gain access to reverb
assembly.

23

TEST AND ADJUSTMENT PROCEDURES
X-5 (18050K)
Step Test &Test Point Depress Tab, or
Extend Tone Bar Play Keys Adjust Oscilloscope
or Other Ind Fig-
Preperations
la) Connect Pe^'
Connector, am
Amp. Connector
lb) Connect Ext. Sp.
Out. of Main Amp. as
Fig. 1And Power
Switch is to "ON".
|c) All Tab.s are to
"OFF".
All Control Knobs are
to "MAX.".
2(a) Indicator Light Note: Confirm
(b) Terminals on PS-5{8! Light "ON".
Board GND B2 (BLU) -26 27.5v D.C.
GND B1 (GRN) _14 15v D.C.
GIMD-+ B1 (ORN) +14~+ 15.5v D.C.
GND-EXP (BRN) +18~+21v D.C.
Note: Confirm AC
Line and GND are
"OPEN".
Tune &Scale
3(a) Across Speaker Upper Man. Tone/ Middle Key Aon Coil LI on 440 Hz
Bar 8' to 8Up. Man. MrZ AlR\PrJ
lb) All Foot &All All Keys Note: 3dB MIN.
Sounds (two keys next to)
xcept bca e
Repeated.
Output Level
4(a) Across Speaker Up. Man. 8' Tone/ Middle Key C on Pot. VR1 on Conform Upper
Bar to 8Upper &Lower PA-33[B) Bd. Man. &Lower Man
Low. Man. 8' Tone Man. is same level.
/Bar to 8
(b) Ensemble Tab. Mid. C, E, &Pot. VR1 on 3.4v rms.
to "ON". Gon Lower PA-56 Bd.
Manual
String Tab. to ON Mid. C, E, &4.5v ±0.5v rms.
Full Tibias Tab. Gon Upper 4.5v ±0.5v rms.
Theater Brass Tab. Manual 4.9v ±0.5v rms.
(0 Upper Man. Tone
Bar
Note: All levels
are ±20% MAX.
16' Tone/Bar 3.5v rms.
5-1/3' 2.6v rms.
8' 2.8v rms.
4< 2.0v rms.
2-2/3' 2.0v rms.
2' 2.3v rms.
1-3/5' 2.3v rms.
1-1/3' 2.3v rms.
r2.5v rms.
2-4

Step Test &Test Point Depress Tab, or
Extend Tone Bar Play Keys Adjust Oscilloscope
or Other Ind Fig-
(0 Lower Man. Tone
Bar
8' Tone/Bar
4'
2-2/3'
2'
1-3/5'
1-1/3'
1'
2.9v rms.
2.3v rms.
2.0v rms.
2.2v rms.
2.2v rms.
2.1v rms.
2.4v rms.
5(a)
(b)
Pedal
IPedal Decay Time
Across Speaker
II Pedal Level
Across t>peaKer
Pedal Tab. 8' &
String Bass I&
II Tab. to "ON"
String Bass Tab.
to "OFF".
String Bass Tab.
[to "ON".
String Bass Tab.
II to "ON"
Pedal Tone Bar
Pedal Tab. to 8'
Pedal Tone Bar
to 8
Pedal Tab. to 8'
Mute Tab. to
"ON"
Pedal
Pedal Key Cof
High Note
Pedal Key Cof
nign Note
Pedal Key G
Pedal Key Cof
Low Note
Pedal Key Cof
High Note
Pot. VR2 on
SB-5{B) Bd.
Pot. VR1 on
SB-5( B)
1.5 sec.
150 msec.
±15 msec.
400 msec.
±40 msec.
800 msec.
±80 msec.
3.4v rms.
4.5v ±0.5v rms.
5.4v +0.5v rms.
2.3v±0.5v rms.
2
6[a| Across Speaker
Noise Level
Full Tibias Tab.
to "ON". Mid. Key Con Up. Man. Level is at ~20dB
~-24dB when
Exp. Pedal MAX
to MIN.
(Level is OdB at
Exp. Pedal MAX)
7(ft) Across Speaker AIITab.s to ON
(Except Reverb
Tab. &Mute Tab.)
All Tone Bars to 8
All Tab.s to OFF
All Tone Bars to
(OFF), and
Percussion Tab.s
to ON
Mid. Key C
on Up. Man.
&Low. Man.
5mv rms. MAX.
10 mv rms. MAX.
No noise occurs.
•NOTE: During Test Procedure The Following Must Be Maintained Unless Otherwise Stated:
a. All Control Knobs and Expression Pedal ai Maximum.
b. All Tab.s and All Tone Bars in the Off Position.

11 (a)
[bt
Id
Test &Test Point Depress Tab, or
Extend Tone Bar
Brilliance &Freq. Response
Vibrato
Test Point
R-26 on MG-4(B! B
Reverb
Test Point
R-43&J4 on PA-56
Board
Test Point
Revert) Tali. &Eat
Balance Ear
Upper Man. Tone/
Bar 4' to 8
Second Harmonic
Tab. to "ON"
Decay Tab. to
"Slow"
Next Decay Tab.
to "Fast"
Third Harmonic
Tab. as in step
to do Sec. Harm.
Tab.
Second Harmonic
Tab. to "ON"
Decay Tab. to
"Slow"
Repeat Tab. to
"ON", and Decay
Tab. to "Fast"
Vibrato !&II
Tab. to "ON"
Vibrato I&II
Tab. to "OFF"
Vibrato ITab.
to "ON"
Vibrato II Tab.
to "ON"
Low. Man. Tone
Bar 8' to 8
Reverb I&II
Tab. to "ON"
Upper Man. Key
Fof Lowest Notel Volume Max.
Up. Man. Key FMIN. OdB (Set to
of Highest Note Volume Control)
-2dB-4dB
-13dB -20dB
Middle Key Con
Upper Manual
Check as same to
Second
Harmonic.
Middle Key Con
Upper Manual
Middle Key Con
Lower Manual
Mid. Key C
E&Gon
Low. Man.
Pot VR2 on
PA-33(B) Board
Reit to
Slow (MIN.)
Reit to
Fast (MAX.)
Pot. VR1 on
MG-4<B) Board
Pot. VR2on
MG-4(B) Board
Pot. VR4 on
PA-56 Board
Pot. VR3 on
PA-56 Board
Oscilloscope
or Other Ind
t; 500+100 msec.
Reit; 13+3 tirr
10 sec.
Reit; 70+7 msi
t; 152 msec.
(6.8Hz)
8v p-p
2v p-p
4v p-p
About 70 rrw &
Decay
Time: 2.5-3 sec.
Same Level on
Reverb
"OFF" from I&II
to "ON"

Step Test &Test Point Depress Tab. or
Extend Tone Bar Play Keys Adjust Oscilloscope
or Other Ind Fig.
12(a)
12 M
13 la}
Other Operation
Leslie Socket;
Pin 7, Pon 6, &1
Leslie ON/OFF
to "ON"
Leslie Slow/Fast
to "Fast"
Leslie ON/OFF
to "OFF"
Ensemble Tab.
to "ON"
Lower Man. Tone/
Bar sets to:
8666444
String Tab. to
"ON"
Upper Man. Tone/
Bar sets to:
008888666
Full Tibias Tab.
to "ON"
806808006
Theater Brass Tab.
to "ON"
—do —,sets
848868666
Note: That Pin 6is
Pin 7is removed fr
If Tab. is returned
Pin 6and Pin 7are
Note :Same Tone a
Same Tone a
grounded (to Pin
Dm ground (Pin 1)
oSlow, Pin 7will
removed from gro
sTone Bar Settinc
sTone Bar Setting
)and that
je grounded,
nd (Pin 1>.
9
-ditto -
-ditto -
14 Test of Mechanism Operation
a) Confirm that Tone Bars are easy to operate, and that one Tone Bar doesn't disturb other Tone Bar
operation, and that Mark 8 is visible,
bl Confirm that Keyboards are operational.
c) Confirm that Expression Pedal is normal to operate and to stop at will.
d) Confirm that position of Knob Mark is normal.
e) Confirm that Pedal Keys are normal to operate.
f) Confirm that Tab.s are normal to operate.
15 Assembly
a) Confirm that Cabinet can be put on the Leg.
bj Confirm that Pedal Unit can be smoothly inserted.
c) Confirm that Knob Bolts can be set normally.

Siep Test &Test Point Adjust Oscilloscope or Other Indication Fig.
Main Amplifier
16(a) Preparations
Across Ext. Sp. Out Connection as Fit 10, 11 10
fb) Test Point Pot. VR1 on Sot 10mV, and about afteral 11
R26 on PW-27{B)
Board PW-27(B| Board Note: Set VR1 to
Stop at lOmV Po
Minute 35mV +5mV
turn left, and turn right,
(c) Across Ext. Sp. Out Input: 0.3V rms. 1000Hz) Output: 16V
Note: Confirm that Output
Wave Form is normal or not.
10
(cl) Test Point
GND +Vcc
GND . . . !Vcc +30V- +35V DC
-30V ~-35V DC
EXT. SP. OUT MONITOR SPEAKER
o o
Fig. 2
10% of NORMAL LEVEL
MAX. 10 msec. DECAY TIME

DECAY TIME
MG-4IB) Board

ccccc SECTION 111.
DIAGRAMS AND TEXT
3-1 GENERAL
This section contains schematic diagrams and
text to illustrate and provide information
necessary to proper organ servicing.