Yamaha ca-410 User manual

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Front Panel and Controls " """"""" 4
Rear Panel and Connections " " "' 6
Connecting and Operating the CA-410 with Other Components " " "
Specifications and Block Diagram " "" " "'
Schematic Circu it Dlagram
11
12
SPECIAL FEATUR ÉS
1. Ample Power and Lower Distortion
With a generous minimum rms output power of
25 Watts per channel, both channels driven, Irom
20 Hz 1.o 20 kHz, into 8-ohm speakers, and no
more than 0.05% distortion, CA-4'10 performance
is exceptional. And the same low distortion is
preserved right down to 250 mW, a tremendous
power'distortion range.
2. Full-Range Power Output l\4eters
The separate meters Tor L and R"hand channels
cover the whole range from 0.01 Watt to 50 Watts
in one unswitched range, a valuable Ïeature that
lets you know how much power your speakers are
handling.
3. Special Low Distortion Low Noise Tone
Controls
A Yamaha 'first,' these tone controls use a
combination of negative feedback {NFB)and capa'
citor-resistor {CR) elements. giving smooth and
accurate control of tonal quality, and a flat res-
ponse in the zero position, with extremely low
noise level (-100 dB) and correspondingly Iow
distortion.
4. Comprehensive Operating Controls and Func-
ttons
With the CA'410 you can listen to any one
source while recording another, or while copyang
one tape recording onto a second deck. Also you
can use the Rec Out Off position to disconnect the
CA-410 from your tape recorder when not actual-
ly recordang.
5. Precise Continuous Volume Control and Full
Loudness compensation
The volume control is an extremely precise,
continuous type, accurately in balance within ti
dB from maximum down to -70 dB. For listening
at low volumes, there is a Loudness Switch which
gives greatly increased naturalness of reproduction,
compensating for our ears' reduced sensitivity to
high and low frequencies.

CAUIIONS.READ IHIS BEFORE OPERATING YOUR CA.4IO
1 The CA.410 is a high performance inregrated
I amplifier, combining 25 Watts per channel
I of output power with a full range ot con-
trols. This manual is required reading if you
are to get the best from it.
Do not drop or otherwise jar the CA,4l0,
which is a piece of precision equipment.
Do not place the CA-410 where it will be
exposed to direct sunlight. excessive heat,
moisture. or dust.
Do not use chemical solvents (such as ben-
zene or alcohol) to remove traces of dirt.
Wipe only with a soft, slightly damp cloth.
lf your CA-410 has a voltage selector on the
rear panel, check that it is set to your local
voltage BEFORE you plug in the AC suppty.
lf not properly set, turn the knob to the
correct position. Voltage settings: 110, 120.
130, 22O, 23O, a d 24O V. Use the next
higher voltage setting if your voltage is not
included (i.e. 120 if your voltage is 115 V).
Models intended for N. America have no
voltage selector, and are set for '117 V AC.
60 Hz.
'ffl Keeo this manual in a safe place for future
ll I reference, and refer Lo it frequently until
| \-/ you are perfectly familiar with att CA-410
controls and functions.
/- Do not attempt to carry out internal adjust- a) lf your CA-410 is provided with spare AC
^\ ments or repairs. Leave these to your local f, outlets on the rear panel (models intended
V service representative. Lrf tor. Europe cannot be provided with this
feature), make sure that the units you con-
nect do not require more power than the
outlets are rated to provide.
Do not assume that your CA-410 is faulty
before checking the 'Trouble-Shooting' tist on
page 13 for common operating errors.
Note that the relay protecting the speakers
will keep the CA-410 silent for a few sec-
onds after switching ON. to prevent the pops
and clicks that can sometimes occur

FRONT PANEL AND CONTROLS
(O PovvEFt (]lv/oFF svvitch
Switch ON to connect the main electrical
supply. The CA-410 will remain silent Ior a
few seconds while the speakers are protected
from the pops and clicks that can occur
immediately after switching ON.
o POWEFT LEtrt Indicator
With the POWER switch in the ON position,
this light-emitting diode will illuminate, in-
dicating that the main electrical supply has
been connected. lf it goes out, with the
POWER switch still ON, this can mean that
the power fuse has blown.
VC]LUIVIE Gontrol
Use this control to give the volume of sound
that you require. Always start with the
control turned fully to the left (counter-
clockwise) at the '0' position, and turn it
down when lowering the phono cartridge
stylus onto a record, and when switching
from program source to source.
@

O BALANcE cùr|rr.:rl
This controls the balance between the L and
R stereo channels. lt should normally be set
at the central '0' position: turn jt to the
right (clockwise) to make the sound appear
to come from the right-hand speaker, and to
the left (counter-clockwise) to emphasize
the sound from the left-hand speaKer.
O LoLJNE NTESS swirch
In the ON position,.this gives more natural
qualityof sounds at low listening volumes.lt
boosts the extreme low and high frequencies
to compensate for our ears' reduced sensi
tivity to these frequencies at low volumes. lt
should be switched OFF when listening at
high (loud) levels.
O ourtruT L.ËvËL Merer"s
These sensitive, wide-range meters measure
the output power for each channel from 0 to
50 Watts. The minimum continuous rms our-
put power of the CA-410 is 25 Watts per
channel with both channels driven into 8
ohms. but peak power can considerably ex-
ceed this. The Watt reading is correct for
8-ohm speakers, but should be multiplied by
two for 4-ohm speakers, and divided by two
for '16-ohm speakers.
e) BASS Tone conrrol
This enables you to emphasize low fre-
quency sounds {rhythm section, etc.) or to
reduce them if your speakers sound
'boomy.' Turning to the right increases the
bass response, and turning to the left reduces
It.
f,) TFTE€!|LÉ Tohe c:onrrol
This works similarly for the upper (treblel
frequencies. Sometimes turning slightly to
the left, to reduce treble response, can cut
out unwanted'hiss'noise or record scratch,
although turning too lar will give an un-
natural or muffled sound. Turning to the
right increases high Irequency response to
compensate for absorption by soft furn-
ishings, curtains, etc.
O TNPLJT sELEcroËt
This switch is used to select the program
source of your choice, whether PHONO,
TUNER. TAPE. or AUX. The AUX setring
enables you to play back TV sound, a short-
wave radio. or even another tape deck. Tapes
played back via the AUX setting can be
copied onto another tape deck.
lE rf Ëc orJT SELECTAFI
Thjs switch selects which of the programs
connected to the CA-410 will be recorded. lt
works independently of the INpUT
SELECTOR, so that you can listen to one
program while recording any other, and
record directly from one tape deck to ano-
ther. At the OF F pos jtion the CA,4l0 is
completely disconnected electrically from
the tape recording terminals.
{D FHC'NES Jack
Plugging in headphones, like the superb
Yamaha HP-1, 2. or 3 units, switches oTf the
speakers automatically, for truly personal
listening-

REAR PANEL AND CONNECTIONS
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O GND (Cinoundl Terrninal
Ground terminals and leads from turntable
units and other components used with the
CA-410 should be connected to this GND
terminal, particularly if there is any audible
'hum' problem. Consult your local hi-fi deal-
er if you require detailed advice.
o PHONO Inputs
Connect the pin-jack cables from your turn-
table unit to these terminals (the left-
channel sockets are upper-most for all
CA-410 input terminals). All conventional
moving magnet (MM), induced magnet (lM),
etc., phono cartridges are suitable, although
some moving coil (MC) types have output
voltages too low for satisfactory results.
Your hi-fi dealer can advise.
O TuNtËR lnput
Connect your FM or other tuner to these
terminals. lf it has an adjustable output
level, adjust this so that the volume does not
change abruptly when switching from
PHONO tO TUNER.

O AUX/TAPE El Terrninats
These terminals are for connecting a second
tuner, or other item of audio equipment,
short-wave radio, TV sound, S,track tape
cartridge player, etc. They also act as a spare
pair for tape playback (not recording) from
a second 'B' tape deck.
Gt TAF,Ê A Terrrrinats'
These are for playback from your tape re-
corder. lf you sometimes use a second tape
recorder (for copying tapes, perhaps). these
are the terminals to use with your main'A'
recorder.
O REc oUT Terrrrinals*
These terminals carry the signal selected by
the REC OUT SELECTOR on the Tront
panel. They should normally be connected
to your 'A' recorder Tor tape recording.
\ hen not actually recording, protect the
CA-4IO against any effect of unused tape
deck input impedances by serting the REC
OUT SELECTOR tO REC OUT OFF.
Recording will, of course, be impossible.
'Note that models for Europe are pro-
vided with DIN REC/PB sockets, which
are convenient if you have a tape deck
with similar sockets and the appropriate
connecting cable. The singte DIN plug
replaces allïour pin jack connections.
f) SF'EAI<ER c'urpur TeFrrrinats
Note carefully the '+' and ' ' signs on these
terminals, and ensure that connections are
made to the corresponding terminals on
your speakers.
@ Spane AC OUTLETS
lT your CA-410 is provided with spare AC
OUTLET sockets (these cannot be fitted to
models for Europe) you can plug in other
items of audio equipment. One socket ls
switched by the CA-410 POWER swirch. and
is suitable lor tuners and other low power
units requiring up to 150 Watts. The other
two are unswitched, and can only deliver a
total of 200 Watts. Do not exceed these
lim its.

CONNECTING AND OPERATING THE CA.4I O WITH OTHER COMPONENTS
Cassette or
OtheF Tape E'eck
Open Fleel or
Other Tape Deck
Speaker System
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and defective stereo
connect the left-hand
speaker term inals and
R IGHT term inals.
image- Also be sure 1o
speaker to the LE FT
the right-hand to the
the VOLU|\ilË well below this setting when lower-
ing the cartridge: at normal or high volùmes the
shock may damage your speakers despite the
protectrve relay.
Use the BASS and TREBLE controls to give the
most pleasant tonal balance. At low listening
volumes, the LOUDNESS switch will qive a more
natural tonal balance in the ON position. On the
other hand, at higher volumes, the ON position
gives unnaturally exaqgerated bass and treble
response.
The CA-410 is designed for speakers with
impedances between 4 and l6 ohms. Use only
speakers which are rated to tâke the full 25 Watts
o{ CA 410 output power, or set the VOLU[/]E so
that the rated maximum speaker input power is
not exceeded, as indicated on the meter readings.
Speakers can be seriously damaged by even brief
overloads. Remember that with 4 ohm speakers
the reading must be doubled (i.e. if the meters read
20 Watts, the real power is 40 Wattsi, and halved
for 16 ohm speakers.
Making the Speaker Connections
1. Strip the insulated covering Trom the speaker
connecting cable for approximately half an
inch, and twist any stray ends together. lf
possible, apply solder to the exposed half inch:
stray ends can cause short-circuiting of the
output terminals, with possible damage to the
CA-410 {although it is well protecïed by safety
relay). Push the lever beneath the terminal as
shown in the diaqram, and align the inner and
outer terminal holes. Then insert the wire fully
home. Release the lever, and the wire end will
be fully and firmly gripped, making a perfect
connectron.
2. Be careful that the terminals identified by the +
and -signs above them are connected with the +
and - terminals on the speakers. A mistake in
this polarity can result in poor bass response
The output cable from the turntable unit
should be connected to the PHONO terminals.
Plug the pin jacks attached to the cables firmly
into the terminal sockets, making sure that the
left-hand cartridqe output is connected to the
LEFT (upper) socket, and the right-hand to the
RIGÈT (lower) socket. Turntables are usually
provided with a third, GROUND, line. Be sure to
connect this to the GND terminal, screwing down
the retaining nut firmly.
To enjoy record audition, turn the INPUT
SELECTOR switch to PHONO, turn the VOLUI\4E
welt down, and gently lower the cartridqe stylus to
the record surface. Raise the volume to the normal
listeninq level, and note the selling. Always lowel

Connect the tuner outpLrt terminals to the
CA 4'10 tuner input jack sockets using the pin'plug
cable provided. lVake su.e that the left- and
riqht hand outputs are connected to the proper
Input socKetS.
To enjoy tuner audition, turn tl're INPUT
SELECTOR switch to TUNER, and operate the
tuner to receiver F lVl or AM broadcasts. lf your
tuner generates noticeable hiss noise (particularly
when liqlening 1o slereo broadcasTs),1he I RFBLF
control may be turned down slightly to reduce it.
lf your tuner is provided with output level
adjustment, use this control so that there is no
signi{icant change in listening volume when switch-
ing the INPUT SELECTOR belween the TUNER
and PHONO settings.
This input doubles as a spare for anv stereo
source, being suitable for nominal 150 mV
inpuls (the same as the TUNER and TAPE A
inputs), and as a second TAPE playback input. Use
it for Hi-Fi reproduction of TV sound, for B track
stereo cartridge tapes, for short-wave radio repro'
duction (although this will never give Hi-Fi re-
sults), or for high output level PHONO cartridges
(ceramic or other types - your dealer willadvise).
Alternatively, use it to play back tapes from a
second or 'B' reel to-reel or cassette tape deck,
particularly any that you may want to record on
your main, 'A,' deck. Note, however, that these
terminals cannot be used for recording, bu| ortly
{or playback of the tape to be (ecotcled.
Two tape decks, A and B, can be connected to
the CA'410 at tlre same time. Your main deck
should be connected to the TAPE A and REC
OUT terminals, and any second deck to the
AUX/TAPE B input terminals for playback. Play-
back will be possible Trom A and B, copying from
B to A, and recordrng on A only. At any time you
can listen to sources you are not recording, and if
Vou have a three head deck, you will be able to
monitor recordings.
Usinq standard pin plug cables, connect the
LIN E OUTPUT terminals on your'A'tape deck to
the TAPE A terminals, and the LINE INPUT
terminals on the tape deck to the REC OUT
ierminals. Be careJul to connect left and right-
hand channels correctly- Connect the LINE OUT-
PUT terminals on your 'B' tape deck to the
AUX/TAPE B termina ls.
Only LINE INPUT and OUTPUT pin-jack
conneclions are shown, but where the DIN REC/
PB connector sockets are provided (on models for
Europe), they may be used instead in the same
way, wilh the one DIN plug replacing all Tour pin
plugs.
To enjoy tape audilion, set the INPUT
SELECTOR to TAPE A (or TAPE B/AUX as the
case may be), and operate your tape recorder for
playback. All tone and other controls on the
CA 410 can be used to give the most acceptable
tonal balance.
To make a tape recording on deck A, set the
REC OUT SELECTOR to the program source you
wish to record. Recording will then be possible on
deck A. To dub (that is copy) a recording from
tape deck B to deck A. set the REC OUT
SELECTOR to TAPE COPY B/AUX > A. The
signal played back from B will be recordable on A.
It is not possible to dub from deck A to deck B.
Tone and other controls have no effect upon
the signal being recorded. Corrections to tonal
balance, etc., must be made during playbâck.
lo

f exoro
l
L cHl TUNER
I laPE a
I AUX/TAPE I
I eroruo
I
R cHl TUNER
I TAPE A
LAUX/TAPE B
BTOCK DIAGRAM AND SPECIFICATIONS
Signal-to-Noise Ratio ( | H F-A Network)
SPECIFICATIONS
Continuous Min. RMS Power
(both channels driven, at
rated 0.05% distortion,
20-20,000 Hz)
25 + 25 Watts (8 ohms)
Total Harmonic Distortion (THD)
Aux to Speaker Out terminals O.05% or less (at rated 25
Watt outputl
0.05% or less
O.05% or less
10-50,oo0 Hz
Better than 50
4 to 16 ohms
2O-2O,OOO Hz t0.5 dB
20-20,000 Hz r0.5 dB
Phono to Rec Out terminals
Intermodulation Distortion
Power Bandwidth
ilHF 0.O5% THD)
Damping Factor (8 ohms,
1 kHz)
Speaker I mpedance
Frequency Response
(Aux - Sp Out)
RIAA Deviation
Aux to Speaker Out
terminals
Phono to Speaker Out
terminals
Residual Noise
Channel Separation
(8 ohms, 1 kHz, at rated
output)
Input Sensitivity/l mpedance
Phono
Aux, Tuner, Tape PB
Phono Dynamic Margin
(1 kHz,0.O5% THD)
Output Level/lmpedance
Tape Rec Out
Tone Controls
Bass
Treble
Loudness Control
(vol. -30 dB)
100 dB
77 dB
O.13 mV
Better than 60 dB
2.5 mV/50 kO
150 mV/50 kç|
150 mV rms
150 mv/l ko
t10 dB boost/cut at 50 Hz
t9 dB boost/cut at 10 kHz
50 Hz; +$ dB: 'l 0 kHz; +6.5 dB
Other Features
Output Level Meters
Rec Out Selector
Speaker Protection
Semiconductors
Power Source
Power Consumption
Spare AC Outlets (USA and Canada)
Switched
Unswitched
Dimensions (WxHxD)
Weighr
1OO mW (0.O1 Watt) to 50
Watts (log scale)
With Off position isolating
tape connectrons
By self-resetting relay
34 Transistors, 2'l Diodes,
and 1 Zener Diode
120 V AC, 6O Hz (USA and
Canada)
110-130/220-240 v Ac,
50/60 Hz (Other areas)
80 Watts
1 rated 150 Watts
2 rated 2OO Watts (total)
435 x 137 x 350 mm
17'ft" x53f"" x133fo"
8.5 kg (18 lb 11 oz.)
Specifications subject to change without notice.
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SCHEMATIC CIRCUIT DIAGRAM
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TROUBTE SHOOTING
Before assuming that your CA 410 is Taulty, check the following trouble-shooting list. which details corrective action you can take yourself,
without having to call a service representative.
Fa|llt Cause
No power althouqh POWER switch is ON
{POWER LED unlit)
Plug firmly inlo the supply socket
In this câse contact service representâtive*
Cure
Check and change as necessary
No sound although power is connected
Sound comes only, or mainly. from eirher L or R speaker
Sound suddenly cases during âodition
Poor bass response and badly delined sr€reo image
A loud 'hummins' is h€ard instead of th€ record when
attempting phono âudition
Input plugs incorrectly inserted, loose, or disconnected Ch€ck and insert fullv in the correct oositions
Speaker connectjons f aùlty
Speaker connections faulty
Input connedions faully
I Balance control not properly adjusted
Either the pin-plugs from the phono cartridge are not firmty
plugged into the input sockets, or the braaded shiejdinq wire
Set to give correct stereo balance
Sound will be restored âs soon as the fault clears
lf the faull persists, switch OFF and wait briefly before
switchinq ON again.
ln this câse contact service representative"
Reverse the connections to one speaker (not both)
Plug jn firmly, replacinq the faulty shielding if
Checl. dnd make good rhe GND (g'ound) wire
Increase the separation between turntable unit and spea-
kers avoiding locations directly in lin€ with the speakers
lniorm your local radio licensing authorit,
Consult with a technjcâl rep. ât your local Yamaha retaiter.
Check and make good
Check and make good
Check and make good
The VOLUME cannot be raised durins record audition
without a loud "booming"noise
Amateur radio transmissions are heârd mixed wirh
program material
This is caused by sound from the speakers reachang the phono
cartridge stylus
Bass and treble frequencies are unnatural and exaggerated The LOUNDNESS switch is ON
Amateur transmissions are taking place in the very near
neighborhood
Switch OFF except at low listening levels
AC power line not plugged into supply socket
AC main fuse has blown.
INPUT SELECTOR in wrong pos,t'on
The protective circuit has detected 12 V DC at the speaker
terminals, ând disconnected them.
AC main fuse has blown
Speaker phase polaritv (1 connections) incorrect)
Ine |-lÈL uul uFr s!1JrÎch rsât ul-l-
l3
Recording is impossible
*Note: Thefuse is not user-accessible: leâve reoiacement to a service reo
Set to the appropriate source