Harman Kardon BALLAD User manual

INSTRUCTION MANUAL
It is essential you read this ins tru cti on booklet c:i. refully before installing yo ur
high fidelity system. You h ave in vested in an ext remely fine e le c h· cnic instru-
me
nt into which many exce ll e nt en gi n ee ring dev el opme nt s ha ve b ee n incorpo-
rated, and eac h is important for the pro per operation of yo ur system. This booklet
has
bee n written in simple non -t ec hni ca l bnguage and if you will t:ik- 3 time to
r
ead it f:h- st before doing anything else, you w :ill fin d it simple to obtain optimum
perfo
rm ance from yo ur Harm an -Kardon Model A230 Stereophonic Amplifier.
Be s ur e to k eep this booklet available at all times. It contains indi spensab le
technical a
nd service information.
ThiJ rs the Harman-Kard on S1er eo Sy mb ol. It i.r your ,umra11ce of mperb 1/ereo perfo,-,nance.

j
UNPACKING
After unpacking the Model A230, i nsp ec t it carefully for signs of transit dam-
age. Th e unit was subjected to man y inspections and te sts prior to final packing ,
and
ther efo re sho uld be in perfect condition. If damage is visible, notify yo ur
d ea ler at once. If th e unit was s hipped to you, notify the transport ation company
without del ay .
Check th e contents of th e carton thoroughly and inspect the folds of the
packing material before discarding it. Your package should c ontain the following
it ems:
1 Mod el A230 Stereophonic Amplifier-Preamplifier.
1 ln s tru ction Booklet
1 Warranty Card
1 Mounting Template.
WA RRANTY PO LI CY
We ur ge you to fill in yo ur warranty card a nd mail it to the factory with-
out delay to protect yo ur rights 1mder warranty. Th e wa rranty cards ar e ca refully
fil ed for r efe r ence and should you re quire information on the use of this high fidel-
ity unit, or re
pair service, we will be able to id e ntify your set and re pl y quickly.
N OTE: It is necessary to receive factory a utho rization before re turning a
se t for warranty r epa ir to an authorized station. Repairs are to be returned on
an Express Prepaid basis. A le tt er desc ribing th e exac t djfllculty must be enclos ed
with the unit to ge th er with your original sales slip.
WA R RA NTY
We warrant each Mode l A230 to be fr ee from defects in mat erial and wo rk-
mans
hip under normal use a nd se rvice, a nd in accordance with th e conditions
he
rein below set forth, for a pe riod of 1 year from date of delivery to th e original
purchaser, and agree to replace or r epa ir any part or part s, with the except ion of
tubes
which are under th e manufacturer's 90 da y warranty, returned to us within
sa id 1 yea r, with transportation prepaid and wh i ch o ur examination shall disclo se
to our satisfaction to h ave b ee n thu s defective. Thi s warranty does not include
free labor, nor is it ap pli ca bl e to any instrum e nt which shall h ave b ee n r epaire d
or a
lt ered in any way so as in our judgm ent to a ff ec t its stability or reliability nor
wh ich has been s ubj ec t to neglect, misuse, abuse, neglig e nce or acc id e nt nor
which has had the se rial numb er a lt ered, effa ce d, or rem ove d. Neither shall this
warranty app ly to any ins trum en t which has b een co nn ec t ed otherwise th an in
accordance wi th ins tru ctions furnished by us.
This warranty is expressly in li eu of all other warranties, express or implied ,
a
nd of all other obligations or liability on our part , and we ne i ther assume nor
authori ze any representative or other person to assume for us any o ther liability
in connection w
ith the sale of this in st rum e nt.
IN ST ALLATION PR OC EDURE
Ventilati on:
The Ballad is we ll ve ntilat ed in itse lf , but sufficient space must be allowed
arou nd it to p erm it proper a ir fl ow. Th e unit m ay be mount ed v·ertically. Allow th e
rear of the eq uipm e nt cabi n et to remain open and if poss ib le cut louvres on the
woode n mounting pane l for added ventilation. Re du c in g air flow will sharply re-
duce tub e and co mp one nt li fe. \Vh en installing th e am plifier on a book shelf, do
not place books or oth er objects on th e cage or in the imm e diate vicinity of th e
ins
trum ent. Follow these mountin g precautions carefully a nd yom unit s hould
continue to o perat e perfectly for ma ny years.

Power Requirements:
Plug the AC line cord into any outlet furnishing 117 volts, 50 or 60 cycle
AC current.
The voltage may vary between 105 and 125 volts.
AC Convenience Outlets:
Two AC convenience receptacles are located on the rear panel of the A230.
Auxiliary
equipment ( tape deck, record player, tuner) may be plugged int o
these outlets
and will be controll ed by the push-button power on/off switch
located
on the front panel.
~T~
TAPE
EOUALllATION
:=:LEFT RIGHT=
LOW LEVEL INPUT
HIGH LEVEL INPUT
TAPE HI
AUX
TUNER
PHONO
HI
I-
TAPE
OUT
LEFT RIGHT
I SPEAKER CONNECTIONS I
~©~CE1r~0~
A 8 COM Lr,...J
L5_J COM 8 A
~ L-.:::::::::::1
~
8""- 16.1'\.
SPEAKER IMPEDANCE
l@D
oo 1 000
SPEAKER PHASING
117V AC 601"\,,
'\j"w
2 AMP
2 AMPS TOTAL
[[]] [OJ 8
REAR PANEL MODEL A 230
Spea ker Connections:
Your two speakers shou ld be identical if possible to obtain optimum result s.
Experts agree that a perfectly matched system offers the best stereophonic re -
production.
The speakers should be placed along the same wall app roximate ly 8 to
15
feet apart depending upon room size and furniture placement. It may be neces-
sary to experiment
with the speakers until best results are ob tained.
Use any type wire to connect yo w- speakers to the ampli£er. L amp cord
("zip cord") is excellent
and may be dressed easily around the molding for an
inconspicuous and neat installation. Do n ot drive the stap les or tacks through
th e center of the wire for this will short out the two sections and will decrease
tl1e overall volume
or short out the speakers ent ir ely. It is permissible to use
approximately 100
feet of speaker connecting wire for each speaker without loss
of volume.
The unique switching arrangement on th e Mode l A230 enables you to con-
nect your speakers in any of several ways. It is possible to have stereo in one
room, while listening to monophonic reproduction in another portion of your
home. If you prefer, you may add a thii-d channel speaker for "fill" in yo ur main
listening room, or listen to monophonic reproduction in another location. The
stereo speake r selector switches also enable you to listen to stereo in one room,
or stereo in anot her portion of the house. You may also add third channel
speakers to
one or both rooms, also selectable by the front panel switches. Please
follow
the diagrams listed below for the installati on best suited for your use.
St ere o In Room A. No Speakers In Room B:
Connect both leads from the l eft speaker in Room A to terminals A and
COM on the LEFT SPEAKER OUTPUT strip. Connect both leads from the
right speaker in Room A to terminals A and COM on tlie RIGHT SPEAKER
OUTPUT str ip. The shorting bars between all terminals on the SPEAKER
OUTPUT strips must remain connect ed for this method of operation. Refer to
Diagram 1.

.-----SP EA KE R CONNEC TI ON S--- -
r-CE NT~E_R __ -'---'---'- "-'---'-- ~
LE FT SPEAK ER
SY STEM A
RIG HT S PE A KE R
Diagram 1.
The IMPEDANCE SELECTOR switch l ocated on the rear of the chassis
should
be pl ace d in the 8 or 16 ohm position depe ndi ng u pon the nominal im-
pedance r ating of your speakers. If the speake rs have an im pedance of 4 to 12
ohms, t
hrow t he I MPEDANCE SELECTOR sw i tch to 8 ohms. If the speake rs are
rated from 12 to 20 ohms, throw the IMPEDANCE SELECTOR sw itch to 16
ohms.
To operate,
the CENTER SPEAKER switch and the STEREO SPEAKER
SELECTOR switch l ocated on the front pane l may rema in in any posi ti on since
they
are inoperative in this app li ca ti on.
Stereo In Room A . Stereo In Room B:
It is recommended you con nect one stereo speaker syst em at a time.
-- -- SPE A KE R CO NN EC TI ON S----
-~--~ ~-- -C ~EN T,..: E c.;. R __ -'-- -'- --'--="-'---'-- ---,
L EFT SP EAKER
LEFT SPEAKER
SYSTEM A SYSTEM B
RIG HT SPE AKER RIGHT S
PEAK ER
Diagram 2.
•

Remove th e shorting bars bet ween the A and B SPEAKER O UT PUT ter-
minals on both the right and left output strips.
Connect both leads from the l ef t spe ak er in Room A to terminals A and
COM on the LEFT SPEAKER OUTPUT st rip . Connect both l ea ds from th e
rig ht speaker in Room A to te rmin als A a nd C OM on the RIGHT SPEAKER
OUTPUT strip. Now connect th e two l eads from the l eft speaker in Room B
to t er minals B a nd COM on the LEFT SPEAKER OU TPUT strip, and two
leads from the right speaker in Room B to te rmin als B and COM on the RIGHT
SPEAKER OUTPUT str ip .
Th e short in g bars on CENTER A and B mu st rema in conn ec ted. R efe r to
Diagram 2.
The IM PEDANCE SELECTOR sw itch lo ca t ed on th e r ea r of th e chassis
sh ou ld be placed in th e 8 or 16 o hm pos it ion de pending upon the nomin al im-
pedance rating of your speakers. If th e s peaker s ha ve an impedance of 4 to 12
ohms, throw the IMPEDANCE SELECTOR switch to 8 ohms. If th e spea kers
have an in1pedance of 12 to 20 ohms, thr ow the IMPEDANCE SELECTOR
sw it ch to 16 ohms.
To ope rate, th e CENTER SPEAKER sw it ch located on th e front panel
may remain in any position since it is in ope rativ e in this application. To se le ct
stereo operation in Room A, place th e fro nt pan el STEREO SPEAKER SELEC-
TOR swit ch in the "A" position. To se l ect Room B, place th e STEREO SPEAK-
ER SELECTOR switch in the "B" position.
Stereo In Room A. Single Monophonic Speaker in Room B:
Remove the shorting bars between A a nd B SPEAKER OU TPUT terminals
on both the right a nd left outp ut strip s. Also remove th e sho rting bar on th e
CENTER B CHANNEL on the rig ht SPEAKER OUTPUT str ip. Conn ec t a 4
ohm, 10 watt resistor to terminals B a nd COM on the LEFT SPEAKER OU T-
PUT st rip , a nd also con n ec t a 4 ohm , 10 watt resis tor to terminals B and COM
on th e RIGHT SPEAKER O UTPUT s trip .
C onn ec t bo th leads from th e l ef t speaker in Room A to t er minals A a nd
COM on the LEFT SPEAKER OUTP UT strip. Co nn ec t both l ea ds from th e
right speaker in Room A to te rmin als A and COM on th e RIGHT SPEAKER
OUTPUT str ip . This co mpl etes th e stereo spea k er conn ec tions for Room. A.
Connect both leads from your monophonic spea ker in Room B to th e two
CENTER B terminals on the ri ght SPEAKER OUTPUT strip. Note, th e CENTER
A termina ls mu st r ema in strappe d. R efer to Diagram 3.
LEFT SPEAKER
CENTER SPEAKER
SYSTEM A
SYSTEM B
RIGHT SPEAKER Diagram 3.

The IMPEDANCE SELECTOR switch located on the rear of the chassis
should be placed in the 8 or 16 ohm position depending upon the nominal im-
pedance rating of your speakers. If tlJe speakers have an impedance of 4 to 12
ohms, throw the IMPEDANCE SELECTOR switch to 8 ohms. If the speake rs
have an impedance of 12 to 20 ohms, throw the IMPEDANCE SELECTOR
switch to 16 ohms.
To ope rate, the front pane l speaker svvitches must be set as follows:
1. To play stereo in Room A only without oper _ ating the monophonic speak-
er in Room B, throw the CENTER SPEAKER SELECTOR switch to "OFF" and
the STEREO SPEAKER SELECTOR sw i tch to "A".
2. To play stereo in Room A and monophonic in Room B, throw the CEN-
TER SPEAKER SELECTOR switch to "B'', and t he STEREO SPEAKER SE-
LECTOR switch to "A".
3. To play only the monophonic speaker in Room B, throw the STEREO
SPEAKER SELECTOR switch and the CENTER SPEAKER SELECTOR swi tch
to "B".
St er eo With Th ird Speaker In Room A. No Sp e ak ers In Room B:
Remove the shorting bar strapping the CENTER A terminals on the LEFT
SPEAKER OUTPUT strip. The sh orting bars strapping terminals A and B on
both the right and l eft SPEAKER OUTPUT strips must remain connected .
Connect both leads from the left speaker in Room A to te rminals A and
COM on the LEFT SPEAKER OUTPUT str i p. Connect botlJ leads from the ri gh t
speaker in Room A to terminals A and. COM on tJ1e RIGHT SPEAKER OUTPUT
strip. Connect the two leads from the center speaker to the two CENTER
SPEAKER A term i na ls. The two CENTER B termina ls on the SPEAKER OUT-
PUT strip must remain strapped. Refer to Diagram 4.
LEFT S PEA K ER
CENTER SPEAKER
RIGHT SPEAKER
SYS T EM A
Diagram 4.
t
.J,

The IMPEDANCE SELECTOR switch located on the rear of th e chassis
s
hould be pl aced in the 8 or 16 ohm position dep e nding upon th e nominal im-
pedance rating of yom speakers. If the speakers have an impedance of 4 to 12
ohms, tlu·ow
th e IMPEDANCE SELECTOR switch to 8 ohms. If the speakers
have
an impeda n ce of 12 to 20 ohms, throw the IMPEDANCE SELECTOR
to 16 ohms.
To
op e rat e, the front panel speaker switches mu st be set as follows:
1. To pl ay stereo in Room A without th e us e of th e center speake r, the
STEREO SPEAKER SELECTOR switch may be set in either the "A" or "B"
position as th e switch is inoperat i ve in this application. Set th e CENTER
SPEAKER SELECTOR switch to " OFF ".
2. To play stereo in Room A with th e use of th e center speaker, the STEREO
SPEAKER SELECTOR switch may be set in e ither t he "A" or "B" position as
this switch is inoperative in this application,
and th e CENTER SPEAKEH. SE-
LECTOR switch must be set to "A" to activate th e ce nt er chann el.
Stereo With Th ird Speaker In Room A. Single Monophonic Sp e aker In Room B:
Remove all shorting ba rs located on the re ar SPEAKER OUTPUT strip.
Connect both l eads from th e l eft speaker in Room A to terminals A a nd
COM on th e LEFT SPEAKER OUTPUT strip. Conn ect both leads from the
right speaker in Room A to ter mina ls A and COM on the RIGHT SPEAKER
OU
TPUT strip. Connect both leads from the cen ter speaker in Room A to both
A terminals on the CENTER SPEAKER OUTPUT strip. This completes the
speaker installation for Room A.
Now
connect both leads from the single mouophonic speaker in Room B
to both B terminals
on th e CENTER SPEAKER OUTPUT sh·ip. Connect a
4 ohm, 10 watt resistor between te rminals B and COM on the LEFT SPEAKER
OUTPUT sh·ip and similarly connect an additional 4 ohm, 10 watt resistor
be
tw ee n terminals B and COM on the RIGHT SPEAKER OUTPUT strip.
Refer to
Diagram 5.
LEFT SPEAKER
CENTER SPEAKER
CE NTER SPEAKER
SYSTE M A
SYSTE M B
RIGHT SPEAKER
Diagr am 5.

l
The IMPEDAN CE SELECTOR switch located on the rear of the chassis
should be placed in the 8 or 16 ohm position depending upon the nominal im-
pedance rating of the speakers. If the speakers have an imp eda n ce of 4 to 12
ohms, throw the IMP E DAN CE SELECTOR switch to 8 ohms. If the speakers
have an impedance of 12 to 20 ohms, throw the IMPEDANCE SELECTOR
switch to 16 ohms.
To operate, the front panel speake r switches must be set as follows:
1. To play two speaker stereo in Room A without operating the single
monophonic speaker in Room B, set th e CENTER SPEAKER SELECTOR l'
switch to "OFF" and the STEREO SPEAKER SELCTOR sw it ch to "A".
2. To play tlu-ee speaker stereo in Room A wi thout operati ng the single
monophonic speaker in Room B, set the CE
1
TER SPEAKER SELECTOR sw i tch •
and the STEREO SPEAKF.R SELECTOR swi t ch to "A".
3. To play only the monophonic speaker in Room B, throw the CENTER
SPEAKER SELECTOR switch a nd the STEREO SPEAKER SELECTOR
switch to "B".
4. To operate only the center speake r in Room A, set the CE 1 TER SPEAK-
ER SELECTOR switch to "A" and the STEREO SPEAKER SELECTOR to "B".
Stereo With Third Speaker In Room A. Stereo With Third Speaker In Room B: ·
Remove all shorting bar s located on the r ear SPEAKER OUTPUT strip.
Connect botl1 l eads from th e le ft speaker in Room A to termfoals A and
COM on the LEFT SPEAKER OUTPUT strip. Connec t both l eads from the
right speaker in Room A to terminals A and COM on the RIGHT SPEAKER
OUTPUT stri p. Connect both l eads from the cen t er spea ker to tl1e A ter minals
on the CENTER SPEAKER OUTPUT strip. This completes the speaker con-
nections for Room A.
Connect both leads from th e left speaker in Ro om B to terminals B and
COM on the LEFT SPEAKER OUTPUT strip. Connect both l eads from the
right speake r in Room B to terminals B and co;v 1 on the RIGHT SPEAKER
OUTPUT str ip. Now connec t the cen t er speaker in Room B to th e two B t er -
minals on tl1e CE TER SPEAKER OUTPUT strip. T hi s completes the speake r
conn ec ti ons for Room B. Refer to Diagram 6.
The SPEAKER IMPEDANCE switch located on tl1e r ea r of the chassis
shou ld be pl aced in th e 8 or 16 ohm position depending upon the nominal im-
pedance ratinis of th e speake r s. If the speakers have an impedance of 4 to 12
ohms, throw tl1e U.I PEDANCE SELECTOR sw it ch to 8 ohms. If the speake rs
have an impedance of 12 to 20 ohms, th row the IMPEDANCE SELECTOR
sw it ch to 16 ohms.
To operate, the front panel speaker switches must be set as follows:
1. To play two speaker stereo in Room A w ith out operating any of the
spea kers in Room B, set the CENTER SPEAKER SELECTOR sw itch to "OFF"
anil the STEREO SPEAKER SELECTOR switch to "A".
2. To play two speaker stereo in Room B without operating any of th e
speakers in Room A, set up the CENTER SPEAKER SELECTOR switch to
"OFF" and tl1e STEREO SPEAKER SELECTOR sw i tch to "B".
3. To play t lu- ee spea k er s ter eo in Room A wi th o ut operating any of the
speakers in Room B, set the CENTER SPEAKER SELECTOR sw itch and the
STEREO SPEAKER SELECTOR switch to "A".
4. To pl ay three speaker stereo in Room B without op era ting any of th e
speakers in Room A, set the CENTER SPEAKER SELECTOR sw it ch a nd the
STEREO SPEAKER SELECTOR switch to "B".
5. To play thr ee spea k er stereo in Room A or two spea ker stereo in Room
B, set the CE TER SPEAKER SELECTOR swit ch and the STEREO SPEAKER
SELECTOR sw itch to "A". This enab l es you to listen to three speaker ste reo in
Room A. To pl ay two ste reo speakers in Room B, merely thro w the STERE O

LEFT SPEAKER
CENTER SPEAKER
CENTER SPEAKER
SYSTEM A
SYSTEM B
RIGHT SPEAKER
RIGHT SPE AK ER
Diagram 6.
SPEAKER SELECTOR switch to "B'' without touching the other controls. The
reversal of this app lication is quite simple for if you desire to play two speaker
stereo
in Room A or three speaker ste reo in Room B, set the CE 1 TER SPEAK-
ER switch and the STEREO SPEAKER SELECTOR switch to "B". This ena
1
Jles
you to li sten to three speaker stereo in Room B. To play the two stereo speakers
in Room A, merely throw
the STEREO SPEAKER SELECTOR switch to "A"
without touching the ot h er control s.
6. To play three speaker stereo in Room A or s in gle speaker monophonic in
Room B, set
the CENTER SPEAKER SELECTOR switch and the STEREO
SPEAKER SELECTOR switch to "A". To play only sin gle speaker monophonic
in Room B, throw t he CENTER SPEAKER SELECTOR sw it ch to "B" a nd allow
the
STEREO SPEAKER SELECTOR switch to remain in the "A" position. The
reversal
of th is application applies to play a single monophonic speaker in Room
A and
three stereo speakers in Room B.
Single Monophonic Speaker In Room A. Single Monophonic Speaker In
Room 8:
Remove the shorting bars on the CE TER SPEAKER OUTPUT strip.
Terminals A a
nd B on the LEFT and RIGHT SPEAKER OUTPUT strips remain
strapped for this
type of application.
Connect
both leads from the single monophonic speaker in Room A to both
CENTER A terminals on the LEFT SPEAKER OUTPUT strip. Connect a 4
ohm, 10
watt resistor across terminals A and COM on the LEFT SPEAKER
OUTPUT strip.
Connect
both leads from the single monophonic spea ker in Room B to both
CENTER B terminals on the RIGHT SPEAKER OUTPUT strip. Connect a 4
ohm, 10
watt resistor across terminals A and CO~vl on the RIGHT SPEAKER
OUTPUT strip. Refer to Diagram 7. s

SYSTEM A SYSTEM B
Diagram 7.
The SPEAKER IMPEDANCE switch located on the rear of the chassis
should
be placed in the 8 or 16 ohm position depending upon the nom in al im-
pedance rating of the speakers. If the speakers have an impedance of 4 to 12
ohms,
throw the IMPEDANCE SELECTOR sw itch to 8 oh ms. If the speakers
have an
impedance of 12 to 20 ohms, throw the IMPEDANCE SELECTOR
switch to 16 ohms.
To operate, the front panel speaker switches must be set as follows:
l. To play the single monophonic speaker in Room A, set the CE TER
SPEAKER SELECTOR switch to "A". The STEREO SPEAKER SELECTOR
switch may remain in any position for in this application it is in operative.
2. To play the single monophonic speaker in Room B, set the CENTER
SPEAKER SELECTOR switch to "B". The STEREO SPEAKER SELECTOR
switch may remain in any position for in this applicat i on it is inoperative.
Connecti ng Your Tuner:
The FM output of your Harman-Kardon stereo tu n er shou ld be connected
to
the LEFT TUNER HIGH LEVEL I PUT receptacle located on the rear
panel of the amplifier. The AM outpu t should be connected to the RIGHT
TUNER HIGH LEVEL INPUT receptacle. The same method of installation
app li es if you are using a separate FM and AM tuner. If you are using a mono-
phonic
tuner in conjunction wit h the A230, connect the tu n er output to eith er the
LEFT or RIGHT HIGH LEVEL I PUT receptacle. Pl ug the tu n er AC line cord
into
one of the AC convenience receptacles located on the rear panel.
Connecting Your Ste r eo Record Player:
A stereophonic car b·idge uses two output connecting plugs. Prov isi on has
been made on the Model A230 to accommodate any of the three types of phono-
graph pickups available on the market.
MAGNETIC CARTRIDGE: The A230 bas two LO \ i\T LEVE T, T NPUT receptacles
located
on the rear panel. Connect the two outputs of your stereo magnetic ca rt-
ridge to these receptacles. The two PHO O/ TAPE equalization switches must be
placed in the "UP" or PHONO position.
CERAMIC CARTRIDCE: Connect the two outputs of your stereo ceramic cartridge
to the two PHO TO HI receptacles located on the rear panel. Equalization is
automatically selected
when connecting to this position and the FUNCTIO
SELECTOR switch is in the PHONO HI pos ition.
CRYSTAL CARTRIDCE: Connect the two outputs of your stereo crystal cartridge
to the two PHONO HI receptac les.
Connecti ng A Monophonic Record Player:
A monophonic record player uses only one connecting plug. If you are
using a low output magnetic type cartridge, connect it to either of the LOW
f

LEVEL INPUT receptacles. If you are us ing a monophonic ceram ic or crystal
carh·idge,
connect it to either the LEFT or RIGHT PHONO HI input receptacle.
Connecting Your Stereo Tape Player:
A stereophonic tape deck utilizes two playback heads. Each head has it s
own
output plug. Connect one plug to the LEFT LOW LEVEL INPUT re-
ceptacle located on the lower rear of the chassis, and th e other output plug
to the RIGHT LOW LEVEL INPUT receptacle. Place both PHONO / TAPE
switches located directly above the LOW LEVEL INPUT jacks in the " DOWN "
or TAPE position.
Since
the Model A230 has only o ne pair of low level input receptacles for
stereo use, either a
magnetic cartridge or a tape head may be plugged in. If
both types of program sources are desired, it is suggested a ceramic cartridge be
used instead of a magnetic type. The tape head can then be plugged into the two
LOW LEVEL INPUT jacks and the ceramic cartridge can be plugged into the
two PHONO-HI jacks.
Connecting Your Stereo Tape Recorder:
Since most stereo tape recorders have their own preamplifiers, it is not de-
sirable to
plug the output of the recorder into the LOW LEVEL INPUT. This
might cause overloading of the input stage. Connect one of the output plugs into
the TAPE-HI /AUX jack on the RIGHT HIGH LEVEL INPUT s trip and the
other into th e TAPE-HI/AUX jack on the LEFT HIGH LEVEL INPUT sh·ip. •'
Connecting Your Tape Recorder To Make A Recording:
Provision is made on your Model A230 to permit the recording of any pro-
gram material. Connect
the l eft input of your stereo tape recorder to the re-
ceptacle
marked LEFT TAPE OUT on the rear panel and th e right input of
your stereo
tap e recorder to the receptacle marked RIGHT TAPE OUT. To con-
nect a
monaural tape recorder, connect its input to e ither LEFT or RIGHT
TAPE OUT receptacle. If the program source you desire to record is plugged
into the left preamplifier chan nel, use the LEFT TAPE OUT jack, and if it is
plugged into the right preamplifier channel, use the RIGHT TAPE OUT jack.
This will
enable you to make a recording with the proper recording equalizat ion
as determined by your recorder, while simultaneously monitoring the program
with the proper tone control, contour and loudness setting.
OPERATING THE MODEL A230 AS AN INTEGRATED AMPLIFIER
Every control on a we ll designed and honestly cons id ered high fidelity instru-
ment has a specific useful function
related to e ach of the other controls. A brief
explanatory note on the relationship of the various front panel controls will doubt-
less prove useful in organizing and clarifying them for you.
Bass and Treble Tone Controls:
The BASS and TREBLE tone controls on the A230 provide the full range
of tonal adjustment necessary for stereo high fidelity li stening. The tone control
range is considerable
and can adequate ly adjust the l ow and high frequencies in
accordance
with your listening preference , speaker characte li stics and room
acoustics.
You will
note that the BASS and TREBLE controls each have two knobs,
one
in front of the other. The front knob conh·ols the right channel a nd the r ear
knob controls the left channel. The front and rear knobs are coupled with a new
type friction-clutch, so that the BASS or TREBLE tone of both channels can
be adjusted simultaneously by turning the front or m ain body of the knob. How-
ever, if the two channels require different tone control settings, due perhaps to
differences in speakers
or room acoustics, the two BASS knobs may be adjusted
independently to
balance the differences, and from then adjust ed simultaneously
for best overall tone quality.
The two TREBLE knobs can be similarly adjusted.
lb

To set the two knob-sections independently, hold one with your right hand while
tmning the other with your left hand.
To adjust the system set the MODE switch to MONOPHONIC and play a
monophonic
record or radio program. Set the t wo friction clutch tone con trol s
in accordance with your speaker characteristics and room acoustics. The system
will
now be tonally balanced for monophonic and stereophonic listening.
Loudness Control:
The loudness control on the A230 is essentially two controls in one , me-
ehanically
tied together or ganged, to be operated by one knob. This control is
used to adjust the vo lume level of any program material fed into the stereo system.
Its effect
can be modi£ed by the operation of the CO TO UR switch.
Contour Switch:
One of tl1e limitations of human hearing is its tendency to lo se sens iti vity to
the very low pitched so und s as the program sound level is reduced. It is this
characteristic
(known as the Fletcher-Munson effect) which causes one to play
music programs at high listening levels in order to experience the full ri ch tone
available from fine
modern recordings.
Th e Harman-Kardon CONTOUR sw itch compensates for this effect thus
eliminating high listening levels as a r equ isit e for full enjoyment of reproduced
music. For warm, full-bodied r eproduc tion at low listening levels, throw the
CONTOUR switch to "ON". At high levels, the CONTOUR switch has no effect.
Balance Control:
The natme of stereophonic reproduction is such that it requires two identical
channels
to attain the highest degree of faithfulness and spatial distribution. Any
variation
in the efficiency of one channel as compa r ed to the other will disturb
this relationship.
As there may be slight differences between the two speakers,
tape heads , cartr id ge coils, etc., the A230 includes a special control to balance
one channel against the other. Sufficient range is covered by this control to permit
rebalancing of the overall system even in extreme cases where unbalance exists.
It must be noted that the BALANCE control may be set anywhe re within
its range of adjustment to attain system balance.
Mode Switch:
The MODE swi tch is incorporated to select between the various modes of
operation which may be desired for monophonic and ste reophonic reproduction.
This
switch offers FIVE positions of operation. REVERSE, STEREO, MONO-
PHONIC, RIGHT and LEFT.
At this writing, most n ew ly recorded stereophonic discs follow the estab-
lished industry
standard, so that your lef t speaker will reproduce the program as
picked
up by the left recording microphone when the MODE switch is in the
STEREO position. However , this is not necessa1ily so for o ld er recordings. Whil e
one label may present the orchestra with the bass section on the right and the
violins on the left, ano th er recording company may reverse thi s procedure . Some
of us
prefer to listen to a symphony orchestra in the same relative orientation as
in the concert hall. The REVERSE position on the MODE switch serves to re-
verse the apparent locations of instruments in an orchestra to dup li cate the orig-
inal setting
where necessary.
For those who do not have matched speakers for stereophonic reproduction,
the REVERSE position on the MODE switch serves an additional purpose. In
"P ing-Pong" ste r eo recordings, the bass is sometimes favored on one side, while
th e higher frequencies may appear on the ot h er c hann el. By experimenting with
tl1e MODE switch it is possible to channel the low frequencies through th e
speaker system
having the best bass response. Merely throw the MODE switch
back and fortl1 betw ee n REVERSE and STEREO until the low frequencies are
reproduced by the speaker system with tl1e better low frequency response.
The STEREO posi ti on on tl1e MODE switch maintains the Left-Right rela-
tionship for properly
made records.
LC
f

I
When you desire to play a monophonic record utilizing your stereo carb·idge,
the MODE switch should be set to the MONOPHONIC position. This position
combines the left and right sections of the stereophonic cartridge and cancels
vertical
rumble and distortion.
Setting
the MODE switch to RIGHT when the A230 is set for stereo repro-
duction allows
any program material being fed into the right input receptacles
to be reproduced by both speakers simultaneously. If you are listening to a ste reo
disc
and the MODE switch is set to RIGHT, only the right channel of the re-
cording will appear at the speakers. Setting the MODE switch to LEFT allows
all program material
being fed into the left input receptacle to be reproduced by
both speakers simultaneously.
When using a monophonic carb·idge with the A230, the MODE switch
must
be properly set to correspond witl1 the input used. If your monophonic
cartridge is connected
to the LEFT LOW LEVEL or PIIONO III INPUT the
:\1ODE switch must be set to the LEFT position to activate the left preamplifier.
Similarly if your monophonic
cartridge is connected to the RIGHT LOW LEVEL
or PHONO HI INPUT, the MODE switch must be set to the RIGHT position
to activate
the right preamplilier.
To play the AM or FM tuner monophonically, set the FU CT I ON SE-
LECTOR switch to the desired position and turn the MODE switch to MONO-
PHONIC. To play your stereo tuner set the FUNCTION SELECTOR switch
to
TUNER and turn the MODE switch to STEREO or REVERSE.
Function Selector Switc h:
The FUNCTION SELECTOR switch selects the desired type of program
source
and has £om switching positions. PHONO- LO /TAPE- LO: This position
selects
tl1e LOW LEVEL INPUTS for operation. Be sure to properly set the two
EQUALIZATION switches above the LOW LEVEL INPUTS to maintain proper
tone balance.
PHONO-HI: This position selects the PHONO HIGH LEVEL INPUTS for
operation.
TUNER: This position selects the two TUNER INPUT receptacles for operation.
AUX/
TAPE- HI: This position selects the AUX/TAPE- HI receptacles for
operation.
P ower Switch:
The POWER on/ off switch is located in the center of the front panel. De-
press the red push-button to turn the set on. Depress the button again to turn
the set off.
The push-button is illuminated and acts as the pilot light.
Rumble Fil ter :
At times, record changers, tmntables, and even some FM stations produce
an objectionable low frequency signal that is sb·ong enough to be introduced into
the playback system. This is known as rumble and can be eliminated by the
special low freqency roll off switch on the front panel. ·whenever rumble is
encountered, throw the RUMBLE FILTER to "ON".
Spe a ker Selector Swi tche s:
These switches allow the use of any combination of speakers in yom instal-
lation.
The CENTER SPEAKER SELECTOR switch selects the third speaker in
either Room A or Room B for operation. When placed in the "OFF" position
the third speaker is inoperative.
The STEREO SPEAKER SELECTOR switch selects the two stereo speakers
in either Room A
or Room B for operation.
Complete instructions describing
the operation of these switches can be
found in the beginning of the book under SPEAKER CONNECTIONS.

Speaker Pha si ng Swit ch:
When more than one speaker is used in any music reproducing system they
must be connected in a manner as to aid each other, rather than to work against
one another. Since it is necessa1·y to use two speakers for stereophonic repro-
duction, this caution applies.
Checking for phase, and correcting if necessary,
is quite simple.
Place the MODE switch in the MONOPHONIC position and play a mono-
phonic record
with readily apparent bass tones. Listen carefully to the strength
and clarity of the bass while throwing the SPEAKER PHASING switch back and A
forth between 0° and 180°. Select the position which gives maximum bass re-
production.
Once the phase is established the SPEAKER PHASING switch
should
not be manipulat ed again. It is also necessary to properly phase the cen-
ter speakers when used in your stereo installation. Proceed in a similar manner
as previously described. Listen carefully to the strength and clarity of the bass
tones. Now reverse
the connections of the center speaker. (Merely unfasten the
wires from the CENTER SPEAKER OUTPUT terminals and reverse.) If the
bass now sounds louder and clearer in the center speaker, it is in phase. If the
bass seems weaker, the original connection was correct.
Improper phasing will decrease low frequency response and can also create
a '11ole in the middle" effect, or at times wiJI actually shift or eliminate certain in-
struments from
their proper perspective in the orchestra.
S pea ke r I mp e dance Selector S wit ch:
This switch must be set in accordance with the nominal imp e dance rating
of your speakers. For speakers having a rating of 4 to 12 ohms, set the switch to 8
ohms.
For speakers with a rating of 12 to 20 ohms, set the switch to 16 ohms.
Once set, this switch need not be operated again unless the speakers are changed.
Gr ounding Terminal:
A special grounding screw terminal is located on the rear panel of the
amplifier. Connect the ground l ea d from your record player, tape deck and other
auxiliary equipment to this tie point .
Hum:
There has been some difficulty encountered when connecting a stereo record
player to an ampli£er. The conventional form of hookup usually results in one
or more ground loops causing excessive hum. The following procedure will re-
duce hum pickup to a mininmm.
A stereophonic
record player may be subdivided into three electrically sep-
arate systems. These are: 1. The left pickup coil of the stereo cartridge, 2. The
right pickup coil and 3. The turntable chassis in combination with the tone arm
and motor.
The left pickup coil of the stereo cartridge has two output terminals. These
1
l
terminals should be brought through a coaxial, shielded and insulated cable to the
respective input receptacle on the stereo amplifier. Extreme caution must be
exercised to make sure that the ground side of the shielded cab le does not
make contact with either the turntable chassis or the other pickup coil.
The right pickup coil should be brought to its respective amplifier input re-
ceptacle
in a similar manner, again making sure it is completely isolated electri-
ca lly from the left pickup coil and the turntable chassis. It may be advantageous
to twist the two shielded cab les to prevent hum pickup from a radiation source
as a
power transformer or turntable motor.
The tw·ntable chassis is ordinar ily connected through a flexible lead with
the motor shell. However , the tone arm is usually NOT el ect rically connected to
the turntable chassis other than tl1rough its bearings. Since this is an unreliable
connection,
it is suggested that a small hole be drilled into the tone arm ( near
the bearing) and a solder lug fastened with a sheet metal screw be driven into
the hole. A .flexible wire forming a loop should be connected from the tone arm
{3

to the tw-ntable chassis. If thjs does not appear practical, a second and less
satisfactory
method may be suggested. The lubricant should be removed from
the tone arm bearings and replaced by graphite. After the t urntab le motor and
tone arm have been electrically secured to the turntable chassis, a cable should
be connected from the chassis to the ampli£er ground.
This
method applies to cartridges with fom output termi nals and in this
manner the three systems are isol ated from each other and all are returned to
their
proper ground. Trus will avoid hum caused by gr ou nd loops.
In cases of magne tic pickups carrying only three output te r mina ls, and tone
arms wruch are supplied with three-prong plugs, the following modifications of
the procedure will have to be effected.
If the pickup is of the four terminal type, but is used in conjunction with
a thrne-prong tone arm head, the two ground ou t puts of the pickup coils must
be tied together.
The left pickup coil is then connected to a shiel ded l ead wit h the ground
side of the coil connected to the shield leading to the approp 1·i ate receptacle on
the amplifier in the same manner as outlined in the above procedure. The "hot"
output of the right pickup coil wi ll be connected with ano t he r insul ated shiel ded
lead to its receptacle on the amplifier. However, the shield is to be gro u nded
ONLY at the amplifier end, and left Boating at the record playe r end. The record
player chassis
is treated in the identical manner as descri bed in the previous
paragraphs.
In any high fidelity system hum and noise may also be caused by othe r factors.
A com1von
cause of hum may be the interconnection of a record player, t une r
and amplifier, as a result of the cables and different ground potentia l s. If hu m
is experienced and it cannot be h'aced to improper grounding of the pho no
cartridge
or turntable, disconnect everything but t he spea kers from the A230.
If hum persists, reverse the AC line cord in the socket. Also perform the hum bal-
ancing
adjustment outlined in the next paragraph. Pl ug in the record player a nd
if hum appears, reverse the record player AC line cord. Connect your other de-
vices
in a similar manner. CAUTION: Hum may be also induced by defective
interconnecting cables
or by running these cab les too close to strong AC fields.
ADJUSTMENTS
Hum Adju st me n t:
One HUM ADJUST HIGH LEVEL control and one HUM ADJUST LOW
LEVEL control are located on the upper portion of the chassis behind the elec-
trolytic condenser
and in front of t he ECC83 / 12AU7 tube . Eac h ope rates simul-
taneously to
adjust both left and right channels. To adjust for mini mum hum.
set the FUNCTION SELECTOR switch to TUNE R ( turn the tuner off if
connected) and turn the LOUDNESS CONTROL to fu ll volume. The balance
control can remain in the center position. While listening to either speaker, ad-
just
the HIGH LEVEL control for murimum hum. Now set the FUNCTION
SELECTOR switch to PI-IONO-LO/TAPE-LO and set the LOW LEVEL hum
control for minimum
hum.
Outpu t Balance:
Individual OUTPUT BALANCE controls for Left and Right channels are
located between the EL 84 outpu t tubes. These controls ba l ance the two output
tubes of each channel for lowest power hum and distortion. Adjust ment is quite
simple: \\ T ith the ampli£er turned on for a sufficient length of time to be tho r-
oughly
warmed up, turn the LOUDNESS control to minimum. Now , while Hs-
tening carefully to the left speaker, ad just the LEFT OU T PUT BALANCE con-
trol for minimum hum.
Then, while listening to the right speaker on ly, adjust
the RIGHT OUTPUT BALANCE control for minimum hum. Due to the ex-
tremely low
hum level of the A230, this is best done at a time when the room is
{4-

.
very qui et. Th e setting for minimum hum is attained only when the two pow er
tubes
ha ve b ee n exactly balanced , and this is th e condition for absol ute minimum
distortion.
A more critical adjustment
of this control can be made by a competant se r-
vice
man using an I.M. analyzer and oscilloscope.
MAINTENANCE AND REPAIRS
~~= 1
In th e event of a potentially damag in g failure of tubes or components, the
Model A230 is protected by a 2 ampere, t ype 3AG fuse, l ocated on the rear of
the unit. If this fuse is blown, it should be re placed only wi th one of the same
rating. R
ep lacing with a fuse of higher rating will not pro t ect the amplifier, and
m ay result in severe dam age, which will not be covered by t he factory warranty .
R ou ti ne Ma intenance:
Du e to th e conservative d es ign and high quality components of the Model
A230, no routine maintenance
other than yearly tube checking is ad vised. Oc-
casional resetting
of th e hum and output balance adjustments, following the
procedure previously de s cribed , will k ee p the unit ope ra tin g at peak efficiency.
Th ese adjustments should certainly be mad e after any tube replacement.
Re pair:
Only the most qualified service technician should be employed, as special
equ ipme nt and h·aining is re quired to proper ly servi ce a high fidelity amplifier.
Thi s manual contains information of great va lue to the repairman, and should be
kept avail ab l e.
Fac tory Wananty Stations are maintained in most ma j or cities. For th e ad-
dress of the nearest one, or for any other information relating to your Harman-
Karclon produ cts, write to th e attention of the Customer Service De partment ,
Harman-Kardon, Inc., 520
Main St., Westbury, N. Y. Be s ure to include th e model
a
nd se rial numbe r of the set in qu estion. A short description of yow- complete in-
stallation is often
of he lp in an swe ring yo ur ques tions.
REPLACEMENT PARTS LIST FOR A230
P ar t No. Description Price
ESCOM2727 D.P.D.T.
SLIDE SWITCH
.40
ES771372 S.P.D.T.
SLIDE SWITCH
.45
FT3063460 O
UT PUT TRANSFORMER
13.50
FT2362705
POWER TRANSFORMER
18.75
JE2202842
ELECTROLYTIC COND.
3.25
40
MFD/450V WDC.
50 MFD/350V WDC.
JE2362695
ELECTROLYTIC COND.
3.00
100/100
MFD 25 UWDC
40/ 40 MFD 300 VWDC
RV3063498 BALANCE
CONTROL
2.00
RV 3063499
BASS CONTROL
2.35
RV3063500
LOUDNESS CONTROL
2.75
RV3063499
TREBLE CO NT ROL
2.35
ER2363340
FUNCTION SWITCH 1.40
ER3063501
MODE SWITCH
1.40
RVCOM2569 BALAN
CE POT
.65
P3063502
ESCUTCHEO N 15.35
PCOM3468 KNOB DUMMY
CONCENTRIC
.25
PCOM3475 KNOB REAR
CONCENTRIC
.30
PCOM3474 KNOB
FRONT CONCENTRIC .25
'
t6

l
TECHNICAL SPECIFICATIONS
THE BALLAD, Model A230: Dual 15 watt amplifiers and dual preamplifiers
in a magnificently sty l ed instrument. Friction-Clutch Tone Controls: Bass and
treble controls adjust separa tely for eac h c hann el. Once adjusted, the controls l ock
a ut omatica ll y to provide convenience of ganged operation. Exclusive Third Chan-
nel Speaker Selector: Remarkab le new devel opment permits addition a nd operation
ofa third channelspeaker
in local or r emote stereo systems. Also perm it s simultane-
ous operation
of virtually any comb inati on of speake rs- stereo and mo naural-in
local and remote installations. Illuminat ed Push-Button On/Off Switch: vVonder-
fulJy convenient device permits amplifier to be turned on and off with out up se tting
careful setting of controls.
Sp eakers Phasing Switrh: Co rr ec ts for impro perly re-
co
rd ed program material. Subsoni c Filter: Eliminates phon og r aph rumb le.
Circuits:
Output Level:
Output Imp edance:
Frequence Response:
Channel Cross Talk:
Minimum Volume
Hum:
High Level Hum:
Low Level Phono Hum:
Tap e Head Input Hum:
To ne Controls:
Regulation:
Rumble Filter:
Input Levels:
Tap e Output
Recording Level:
Equalization:
AUDIO
Two EL84 output tubes per channel operated conserva-
tively in ClassAB1, self bias,
pentode conn ec ted. Spec ial
phase inve rt er designed for low distortion and hi gh gain
with minimum phase sh ift.
15 watts
per c hann el, 30 watt pea k s. Less than 1% har -
monic distortion
at ma ximum output.
8
and 16 ob ms. Selectable by sli de switch on rear panel.
± 1 db 15-70.000 cycles per second at normal listening
leve
l. Exc:e ll e nt liste ning charac teristics ac hieved hy
u se of spec ial grain ori ented hi gh perm ea bility cores in
both outp ut transformers for exceptionally wide fre-
quency response and improved transients.
B
et ter than 50 db.
80
db below 15 watts.
70
db below 15 watts.
60
db below ]5 watts.
55
dh below 15 watts.
New friction-cl ut ch type controls for se parat e or
ga nged action. Ran ge of bass and tr e ble is ± 12 db at
50 and 10,000 cycles per second.
Excellent B+ regulation is
obta in ed by use of heavy
duty GZ34 rectifier tub e and special power transformer.
This provides cleanly defined low fre
quen cy respon se
and superb overl oad char a cte ristics.
Subsonic filter to elim
inate record a nd phonograph
rumbl e. 10 db pe r oc tav e below 50 cycles per S::!C.
High level inputs: 300 millivolts, 2 megohms, fl at re-
sponse.
Low level phone: 3 millivo lt s at 1 KC. Will not over-
load
with input level be low 180 mv.
Tape Hd: 1 millivolt at 250 cycles.
2 vo
lt s from eac h channe l, unmodified by volume and
tone controls for abso lu tely flat response.
Phone: HIAA
Tape: NARTB
1.6

Special Features:
Co nstruc ti on:
Front Panel Co ntrols:
Chassis Cont•·ols:
Rear
Pan el Controls:
Hear Terminal
Connections:
Conveni
ence AC
R
ec eptacles:
Fuse:
Tube Co mpl eme nt :
Dimensions:
Pow er Consumption:
Finish:
Shipping
Weight:
SPECIFICATIONS (Continued)
Illumin at ed push-button on/off sw itch . Exclusive Third
Chan nel Speak er SelectorSwitches permit the operation
of r emote speakers in any of the following ways:
1. Stereo in one room.
2. Stereo
in one room, monophonic in another.
3. Stereo
with 3rd c hannel in one room, monophonic in
another.
4. Stereo
in one room, stereo in another.
5. Stereo with 3 rd channel in one room, st ere o in an-
other.
6. Stereo w ith 3r d cha nn el in one room, stereo with 3rd
c
hann el in a noth er.
The use of the finest components operated conserva-
tively
fo~ long life an d troubl e free performance. Po int
to point wirin g. Components arc mounted by wrapping,
crimpi ng and then so ld eri ng to in sure low noise a nd
rig idit y.
OVERALL SPECIFICATIONS
Treble (d ual), Ba ss ( dual ), Loudn ess, Balance, Mode
Selector (Stereo Reverse, Stereo Monophonic, Mono-
pho
nic Right, Monophonic Left ), Func ti on Select or
(Tape Lo /Phono-Lo, Phono-Hi, Tun er , Aux/ Tap e- Hi ),
Rumbl e Filter , Contom , 2 Speaker Selector Switches
and Illu minat ed push-button on/ off sw it ch.
Two outp ut tube ba l anc e potentiome te rs for minimum
IM distortion settings. Two hu m co nt rol s.
Phono / Tapc Eq ualization Switches. Speaker Phasing
Switch
and Speaker Imp edance Sw it ch.
Speaker connection
s. Ground lu g.
T wo , controlled by fre nt pan el pu sh- but ton Jn/ off
switc h.
Externally accessible.
Fu ses transformer primar y.
(
Total 10) l -G Z 34 , 4-EL 84, 2-ECC82 / 12A U7,
3-ECC83/12AX7.
13-13/16"
wide x 4~" high x 11)?' deep (excl ud ing
knobs).
125 watts.
Copper escutcheon, silver gr ey cage.
18
lb s.
I
324 H arma n-K ardo n, Inc., 520 Ma in Street, Westbu ry, L. I. , N. Y.
I
-l
I
I
I
I
I
i
I
I

LEfT j
LOIi' LEVEL
IN PUT
"""" '
TAPE OVT
LE'T
Via
12AX7/ECC8,
V2a
12AU71ECC82
V3o
t2AU7/ECC82
,%:? i' I( -.:1
2
~~z1r I '
.
...
"'
~~:
£ST71J72
f0UAL IZAtlON
TAPE POS,
.
""
"'
Vlb
SW 1·
* AJ8
1~ 011
110"'-
[1\23633-1110 FUNCTION SWITCH
s~ u IN PQS I
P 0S. I PJ;ON0 8 TAP£
2 l'tlOHO-CR YSTAL
J TU"l[R
4 TAP E HI-LEVE L
4COM P 0NEHTS IIIAAllED WITH AST[AISll
A'IE INCORPORATED IN P(: PLATES,
PCC0W 3241
I 2 J 4
*"
,oo
PI-IOHO
1· ;·1
"'
,o,
.,,
J.J M
V2b
....!J!..!.. TUNER PH 0N0
TAPE HI
"
2•
r
I
I
I
I
I
I
I
L...!!V)06)49f
[ 8ALANCC
I
I
I
I
..
'"
H> %
ESC0 M27'2T
AUllleLE n.. tEII
L 5, , ·II
.,,
,.
C23
"
V3b
II
I'
I
I'
IL © ~/-4
I -
fl;\1)06J4't
....
,ov 1 A
VJ06J499
TJl:£8LE
I r;.
11'°
L
1
I
'i
~
V4
12AX7/ECC83
...
2701(
.tlO'fo
SW2
CR236J•0t M OO£ SWITCH
SHQ \l'H IH POS I il
,,.t r .. ·1
0,,.-0,, .. L_ ~ ___ _,.,, _
221l ~ HII
·~ ~~
© \
PO$. 1 R£VC,1$E
2 St£ RE 0
J M(»l,t, UR AL
4 RIGHT
5 LE'"f
AUJC TUNEII: PH0NO
Ti°P""[ tl l
(A I GHTl
~
U NL ESS 0THEAWJ$£ SHOWN
AL L AE SJ ST0AS 1/2 'OTT tZ0,c,
TAP ( OUT
RI GHT
ALL CAPACITOR VAL UES WITH DEC I MA L TO 8£ PA.PEit IN M fO
ALL CAPACITOR VAL Ul':S WITHOUT DECI M AL TO IE GENERAL
PURP0S[ CERA M ICS 500 WV OC IN 111 ,ilr
ALL VO LTA.OE$ A A[ DC
ALL A£S1STA HCES A A[ IN 0H NS
530635398
$32 4
r·: :t- ~ _1 --1_---:i:-1
IT I I T:
L ;;;, - - □ -- --f-o _J
(3'\o C)5b CJ~e -C3Sf
TUBE ' z ¥
VI 12A)l;T
... 1800
V2 I ZAUT
, ..
0
V3 1 2AVT
-,.
1200
V4 1 2AX7
-,o. \SOK
VS 1 2AX7
,o.
IS0 K
V6 EU1 4 47 0 1( 47DK
200
V7 ELI-Iii
-1117 01(
-III T0 IC'.
200
Vt ELI •
4701,:;
4701C zoo
V,
.. 4701( 470 1( 200
VI0 G~H
- -
a,
f" UNCTI 0H SW IN PH0 N0/TA PE
,_. ODE SW !N STEREO NORM AL
BALANCE C0NTl'I0L CENTEIIE0
LOVDH ESS COIHA0L ,.ux, GA IN
CONTOUR IN orr POSITION
TONE CONTRO LS f" LAT
~CE CHAll:T
. ' . , .
, oo
zoo ... ! 800
200
200
' . V
too
200
-,.
IZ00
,oo
200
300, 200,
6 . Sll
00 zoo
300,C 200,
6. SK
00 200
a,
200 200
a,
200
200
a,
- -
200 zoo 00
uo
00 00 210
-
loum,r
BAL.
LEFT
RlO
'''"! 10"4
.u,_
O I00 N r0-2SV
- 100 Nr D-2sv
l:J. 40 W F0- JOOV
□ 40 M f"D-X>OV
.,1 f Zl6269S
.
200
<VV
200
zoo
zoo
-
CIO
22
.. o
,o,
,.
Cl<
"
Rs·,
391( :t. 1 0%
'-L .
J,t (),1 8 47
(4) 68Q5
EL84
£.a
Q40Mf"o• •,-Dv
b,,_ ~W0-3~V
JE220 28 -lil2
VIO
GC 34l5AR4
-,
rll. . I ~~
~
•~;t~~~~
0Fr I
CE NHR SP[All[l'l
stlCCT0l'l
" I
I' j ~J-
• CENTEl'I
Sl'(All.£11:
"HASING
Sf"EAkEA
,1.--:1.-,
LI_:rI~
0 -:- b,,.
Cl6 •
' AC
OUTLCTS
PUSH
BUTTON
P0wt J\
$W ITCH
3A .-IZS W'
H TVAC 60'\,
125 't¥
_J

LEFT
LOW LEVEL
R68
22K
. ..
vv,
►
VIG
12AX7/ECC83
£S771372
fOUAUZATlOH PkONO
V2a
12AU7/ECC82
CZ
20K
I/
"
'c: ::i ....
+---''-I- I - - - 1
>
R6
3 •
'> 3, 3M
'
TAPE OUT
L£ ir-T
(o)
.:r_
OFF ◄◄ >-- • ON
I
I
V3a I
12 AU7/EC,C82 I
C6 L-- --- - -1- , ,.
zz
"
II
R8 'c:::::J_...,
2M ,> >
r .>> ,___,._---!..j1- --- 1
'
I
., I II PC2 4922 2
n ' I \ ®
ce I C9
.I 20 .K ____ -·. L. rn-7
400 ,, R II • ~ : ~ ; 50
1 120<,'> ,---L-::!J
11 . ., c; ~1 0
@ r-Jh+'I ---1--
12 0V
I C7 +
I +:~ T
itr.2 1- ..lU "
I
R12 > © '> Rl4 ,.> -t---
1
l !',OOK '">,._ .::::..,___ ,.. SOOK >4'- ~:f
,, :> > (,>---,
I_._ =
Rl5
39K
"''°""
I IL ~ - ,:;-'- 0 -7 1 _
11 @
I\ C l2 _ .:'3 II -
> I '- 15K ~ ~ f
'" 3.••,I
, > A?O
'> 68K
:> 10"-
I' '-.Al6 / Cl4
L 27K , /' R68 IO K ESCOM2727
'I
V4
12AX7/ECC83
II
• • •
V V V
Rl9
39 K
j:,10%
V6 .c•:c:•c.
7
.:. •- ----
e.u
'
Cl6 A20 / "
r-- -- .- ---~ 11°"' -- --- -- .l\·.~··J•.\r -~ •1-1--f== = t
UV 1,
2v n ·v ",
>
A21 ',
.
T3
FT306:S ◄ 60
16.1\.
8..1\..
•
I. OV
Cl5
!OK C:::I' ....
H:1--.- --='- ....::.::
,> A17
,:> 150K
• '> i IO'll.
.~ Rl8
, I OM
?
C.l7
100 :: ::::.
•
72Y
470K. ' ::> R2Z >
~-/\, "I\/""\,---~
f\.VC0 M256 9 .._ . V " V
R26• 100 ', 3 30 • I W t ZV
.tc 10 '4 +.:.:.:...---
OUTPUT_l
SAL. -
LEFT -
,>
II
I\
C t7
ZOK
. . .
V V V
R23
330 - IW
i 1 0%
•• •
vv,
R24
l K \
V7
T
Jt1 V
....
•••
...
Y EL
I M.P EOA NC E
SELECTOR
6
CENT ER
_ A SPE AKE R
.- ----- --11------0 , I
A
-0~
,--------1------ -{.f\:l 8 LEFT
, -- SPi;.AKER
1 -o~
8
IN PUT ._ ___ ...L_
RIGHT ( V
TAPE POS, ---====J
'r POS.
* > 1
R3 1 ◄,- *C l&
I
I
I I @6 - - v
.. v"",..
11
CONTOUR
"
- '- 27 1<
I
~ l01 •1,
ESCON 2727 RV!0
63499
,' R29
,> 270)(
, i 10 %
_._
c4l 6B05
EL8 4
16 J\. 8.11.
STEREO
SPE AK ER
SE LECT OR
3?1 I< <I> :500 ... ,....
~V 3 063498
I BALAN CE
AUM8LE FILT ER-I---< BASS RV3063 500 c:::=~
LOUONESSj OFF-OH
•••
22K
• • •
V V , ' •
'
•
•
II
"
* ·C2Z
> * 2K
'"> R35
' "> 1. 81<
, J: 1 0%
Vlb
SW f
'
Cl9
20K
"
. .
V " V
*R J6
15 0)(
.t l0 %
ER,236 33 40 FUl'tCTION SWI TC H
SHO WN IN PQS I
POS. I PHONO & TAPE
2 PHONO -. CRYSTAL
3 TUNER
4 TAPE HI - LEVE L
*COM PONENTS MARICE O WIT H AS TER ISk
ARE INCORPORATED IN PC P t.A TE$.
PCCO M3248
lx LIil 411(
111::.00 SZ.k i,,QI(
2 3
◄
6
PC249Z902
-.
• •
3 • 5 • 7
,> R 33
> IZOK
. '> t. 10":i.
,> R39
.> 39K
.> .tl0%
•ov I
RV3 0 63499 t
TREBLE I
BAss a TREB LE I
ARE O UA L CLU TCH I " I OK
TYPE CONTROLS .., .., ..,
" C26
. .
' ' .
R•O
IOK- IW
R50
IOK
• 1.w.
• V •
,.,..,
I
I
I I \
..,..,,.
._' :..'o:..v ___ 11 1-:-~ u·"...,. ----~®~-- - -\- ,_._ .. ,J? f. _
11
I
11
r . -; 2- t - - - v"c w-
'.> R4 8
,> 270K
.'> ~10%
vs
'
llU
C3 2 A 56 I ,
t- --<"t---+-- -
" .
C2 l
20K
' •
V2b
' ./
I •
L '>"".,..._.,_...,· ➔~ - - -
R38 ::,, \. i==l
211 ·~
I/
I\
CZ3
22
swz
'---'•
4, 1V
V3b
(R 236J: 0 1 MO OE SW IT CH
SHOWN IN POS. I
POS. I REVERS E
Z STEREO
3 MONA.URA. L
◄ RI GHT
~ LE,:-l
•
--v__,a-- - --~
-
$WI
'- -1----1--4/" ,
c~,• 1 i~~ I 1 zoK''>cz1 , 1soi
400V I '> 3K r - - ~ - ...J
I
~ "I (i) -',
vs
12AX7/ECC83
t
- ---1--- ~lo'l~K---+--"'v-~•• ✓• •v- - ~•~-~~~-t..:.'-1--t
I .. v, ---
J UV
>
A57 •,_
470!< • .,
B
~ 7U ,
I r;..;; ~ ·! \ I
f l500< · @ ••• > \ .1 r.
~--'<LL. - · ..
1
sooK • •~ ,;:t:H-+--r-l ' .._ c::::::::i
! 7
@) II (!) IM '>-- ---
1 '> C 28 L - ... .. - • \. .
.
I
I
I
I
•
UY
I
C 31 _ "'I
l~K Z C::::I
t--11- ---~--
I\
'
R59
. . .
V V •
330 -IW
s 10 "JI,
RVC OM 2569 ◄"
R56 100 >
OUT PUT I
8Al • ....L. '... . ......
RIGHT ""=- 1,.--Avl\Jl .v-. -- -4
IZV
IR•
1, > 1s• cz91
',, 27 K " ::; '3 4K
OFF - O •z"z•6 ; ... L_ '_\ __ ~:'.'.JR 71 <_
K ~ 69K.<
* 10'11, ◄ 10 '1. ◄ >
® t----;\,--..___J
•
1. 0Y
•
7ZY
R81 •,_ RISO 1
47 0K '> 330 -I W
I/ , .i 10"4 ~ - ~
._ ___ .,_ __ +---- +- - -llf-- -"-- ~•vv'V•v\,--~•,.._+-----ll-l---1-~
• c' .. \ R 62 L..=::-::
\_PC2492902
':,, R53 Z O~ I K • , •
•.., ISOK
• .t 5%
.... ~--------- -- ➔
, ~ R5 4
· 680
V9 1 '""
L-=+-l-+-1--'
lt1V
C38 _ .._
100, .... , -.,
.:t 10%
C 34
22
I/
"
• A • ,osv
,> R53
,---- ----------- +-,-----_J ,> I K
,·; T·~- _I::_--~I .. -- -:1:J -1
1
1 c
100 ~:~ -z sv o •~-•sov :,,,.:.w
C3:\o
_ _ _ _ - I OO MF 0-25 V /:::,, 5o MF 0-3 50V
L " __ □- _ --- I-~ _J □ A 40 M FO- 300V JEZ202842
L > -40 MF0• 300V
JE 2362695 V10
-
c,~c C3Sd
G ~34/5A R4
•••
Ft£S !E ·t cE CHAAT
... ~~ =!!.!...
Tf l
.}J/.!. TU N ER PH ONO
TAPE HI .-, 1
\' LEFTl
PC2783-367
• 401l tf OK
' .
2 3
.. L- - L.. -l-
---
-- -
AUX TUNEFt P HOHO
TA P[ HI HI
(R I GHT\
NO TE:
U NLESS OTHERW IS E SH OWN
AL L RESISTORS l/2 WATT t20%
T AP E OUT
RIGHT
ALL CAPACITOR VALU ES WI TH OEC I MAL TO BE PAPE ft IN M FO
ALL CAPAC IT OR VA LU ES WITH OUT OEC fM AL TO BE GENERAL
PURPOSE CERAM ICS 500 WV 0C IN Mt,IF
ALL VOLTAGES ARE DC
ALL AE StSTA.N CfS ARE IH OH MS
S30635398
S 324
TUB E I 2 3 4 5 &
VI 12AX7 - 69K 18 00 00 200 -
V2 12AU7 IOM 0 00 200
V3 1 2AU7 -I M 120 0 2() 0 200 -
V4 12A X7 -10..- 1 50K 2 00
v5 1 2Ax7 - 1 0M , soK 1lt oo
~ v "'s'='-'E='L"'=' e :;. • -1.., . "'1~0- <+•.,;1;.oc:•~ 1-: 2:;:o~o ➔ i 'lioo
V7 EL8 4 ,n ot< 4701( 200 200
200
200
zoo
200
300K
300K
<D
<D
V8 EL8 ◄ 470k 4701( 200 zoo 200 <D
V9 r, 84 470K 470K 200
VIO Gl34 - - (X)
FUNCTION SW IN PHO N O/ TAPE
MOOE SW IN STE R£0 NORM AL
BAI.ANCE CON TROL CENTERED
LOUDN ESS CO N TROL MAX. G AlH
CON T OUR IN OF'f POSITION
TONE CONTROL S FL AT
200 200 (X)
280 <D o:>
7
69 K
,ow
,,.
ZOOK
200K
8
1 800
0
, zoo
6 .5 K
260 -
8
zoo
,
200
200
200
VI V6
V2 V3 vs V8
V7
N Ql84T
V9
• • •
L 21SVAC
.
•
?UY AC
HUM AO JUS T
':,, R64
'-----
LO W LEVEL , '> IOO
~
◄-... R65
,__ ___ _
HIGH LEVEL 4> 100
HUM AOJUST
AV Z362690
••
.,
•••
. .. .
.,
l
l6Jl
8.1\.
o•
..... .. ...
PHASING
SPEAKER
CE NT ER SPEAK[fl
SE LE CTOR
L---+---.P, _., ~
- RIGHT
'---- --,f---- -{V'") I SPE A KER
'-- --------- -1- ---v.n ~
Tl
fT2362705
tLK
FUSE
ZA
, ..
Hi If- AC
OUTLETS
'-
PUSH
BUTTON
POWER
SWI TC H
3• .-125 •
11 7V . AC 60'\,
-- - ~
.---+----0 , a
f)
C·tN TEfil
SPEAK ER
I