Yamaha CA-610 Owner's manual

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YAMAHA offers vou thanks and congratulations
on your choice of the CA-610 pre-main amplifier.
Product of research directed at making the best
possible audio performance available to the widest
range of enthusiasts, the CA-610 15 currently
setting new standards for 1s class.
Special Features of Your CA-610 Intergrated Amplifi
Front Panel and Controls ..... i i 44 4 4 4 4 4 4 a à a a 4 a 00 4 — 5
Rear Panel and Connection
Model À ee ee 6
Models B and E 122144 4 84 8 44 4 6 8 8 4 ee ee eee 7
Connecting and Operating
the CA-610 with Other Components (Models A, BY ....... 8 — 11
М | 11
Block Diagram and Specifications ...... i e. 12
Schematic Diagram . «oot eet eee ee a 13
Trouble Shooting... oi i ee oerooo 14
1. High Power and Low Distortion
With a generous minimum rms output power fo 40 Watts per channel,
both channels driven, from 20 Hz to 20kHz, into S-ohm speakers, and no
mare than 0.05% distortion, CA-610 performance is exceptional. And the
same low distortion is preserved right down to 250 mW, a tremendous
power-distortion range. At 20 Watts distortion drops to 0.01% (and
0.005% at *kHzl}.
Z, Fuli-Range Power Output Meters
The separate meters for L and R-hand channels cover the whole range
from 0.01 Watt to 100 Watts in one unswitched range, a valuable feature
that lets vou know how much power your speakers are handling.
3. Special Low Distortion NFB Tone Controls
Tone controls typically only contribute 0.008% to distortion from
207 ta 20kHz, and there are separate defeat switches for bass and treble
controls so that you can check the effect of tone-control settings.
4. Comprehensive Gperating Controls end Functions
With the CA-610 vou can listen to any one source while recording any
other, or while dubbing from one tape deck to another. Also you can
isolate the CA-010 from the effects of tape-deck input impedance when
recordings are not actually taking place by using the Rec Out Off position.
%. Precise Continuous Volume Control Plus Muting
The muting switch offers instant reductions in listening volume of
—20dB5, and the volume control is an extremely precise, continuous type,
in balance within + 1 dB from O to —70dB.
O, Many “Extras” are Standard
The list of extra features includes comprehensive protective circuits,
provision for two speaker systems, loudness switch for low level listening,
subsonic {rumble} switch, and stereo/mono mode switch, etc.
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AUTION - READ THIS BEFOR
The CA-610 is a high performance pre-main
amplifier, combining high output power
with a full range of controls. This manual is
required reading if you are to get the best
from it,
En
Do not drop or otherwise jar the CA-B10,
which is a precision instrument.
NA
Do not mount the CA-610 where it will be
exposed to direct sunlight, excessive heat,
moisture, or dust.
Do not use chemical solvents {such as
benzene or alcohol) to remove traces of dirt,
Wipe only with a soft, slightly damp cloth.
Do not assume your CA-510 is faulty before
checking the “Trouble Shooting” list on page
11 for common operating errors.
De not attempt to carry out internal adiust-
ments or repairs. Leave this to your local
service representative.
Note that the muting circuit keeps the
CA-S10 silent for several seconds after
switching ON, to prevent the pops and clicks
that can sometimes occur.
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IF your CA-6810 is provided with spare AC
outlets on the rear panel, make sure that the
units vou connect do not require more
power than the outlets are rated to provide.
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Always check the main VOLUME setting
“before returning the AUDIO MUTING
switch to NORMAL. The sudden increase in
level is enough to damage some speakers
with the 40 watts rms per channel which the
CA-610 provides if the level was too high to
start with.
Keep this manual in a safe place for future
reference, and refer to it frequently until
vou are perfectly familiar with all CA-810
controls and functions.
If your CA-610 has a voltage selector, before
vou plug in the AC supply, check that it is
set to your local voltage. If not properly set,
turn the knob to the correct position, Voit-
age settings: 110, 120, 130, 220, 230 and
220 Y,
Canadian models are set for 117V 60 Hz
alone, and have no voltage selector.
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7 POWER ON/OFF Switch
Switch ON to connect the main electrical supply.
The CA-610 will remain silent for a few seconds
while the speakers are protected from the pops
and clicks that can occur immediately after switch-
ing ON.
& POWER LED Indicator
With the POWER switch in the ON position, this
light-emitting diode will illuminate, indicating that
the main electrical supply has been connected, If it
goes out, with the POWER switch still ON, this
can mean that the power fuse has blown,
VOLUVE Control
Use this control to give the volume of sound that
vou require, Always start with the control turned
fully to the left {counter-clockwise) at the UF
position, and then turn to the right (clockwise) to
increase the volume to the level vou require.
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This offers a straight 20 dB reduction in signal
level (Le. to one tenth the power) without having
to adjust the VOLUME control, Use it when
switching between different program sources, low-
ering the phono cartridge onto the record, etc, If
your normal listening level has the VOLUME at
about the 3° nosition, switch the AUDIO MUT-
ING to —20 dB, and turn the VOLUME back up
to compensate: this gives better results. Be careful,
however, not to return AUDIO MUTING to
NORMAL without reducing the VOLUME again.
EN
7
LLEVES
EAL ANGE Control
This controls the balance between the L and R
stereo channels, 11 should normally be set at the
central ‘0’ position: turn it to the right (clockwise)
to make the sound appear to come from the
right-hand speakers, and to the left (counter-
clockwise] to emphasize the sound from the
left-hand speakers.
Crrartres!
in the ON position, this gives a more natural
quality of sound at low listening volumes. It
boosts the extreme low and high frequencies to
compensate for our ears’ reduced sensitivity to
these frequencies at low volumes. It should be
switched OFF when listening at high (foud) levels.
D OUTPUT LEVEL Meters
These sensitive, wide-range meters measure the
output power for each channel from О to 100
watts. The minimum continuous rms output
power of the CA-610 is 40 watts per channel with
both channels driven into 8 ohms, but peak power
can considerably exceed this. The watt reading is
correct for § ohm speakers, but should be multi-
plied by two for 4 ohm speakers, and divided by
two for 16 ohm speakers,
A505 Tone Control Wich DEFEAT
This enables you to emphasize low frequency
sounds {rhythm section, etc.) or to reduce them if
your speakers sound 'hoomy.” Turning to the right
increases the bass response, and turning to the left
reduces it. The tone control only works when the
DEFEAT switch is in the ON position. At
‘DEFEAT, the tone control is bypassed. You can
compare directly the effect with and without the
tone control by using this switch.
TREBLE Tome Control With ВЕНЕ Л
This works similarly for the upper (treble) fre
quencies. Sometimes turning slightly to the left, to
reduce treble response, can cut out unwanted ‘hiss’
noise or record scratch, although turning too far
will give an unnatural or muffled sound. Turning
to the right increases high frequency response to
compensate for absorption by soft furnishings,
curtains, etc. The DEFEAT control works in
exactly the same way as the BASS defeat.
| НСО FILTER Bwiteh
This switch enables you to cut out low frequency
rumble which can arise from warped records, etc.
Since it has hardly any effect on audible fregu-
encies above 25 Hz, it can be left ON permanently
with virtually no ill effects on normal audition.
NESST SELECTOR
This switch is used to select the program source of
your choice, whether PHONO, TUNER, one of
two tape decks {1 or 2}, or AUX [or B-track
tape cartridge, short-wave radio, etc.)
@ STEREO/MONO Mode Selector
This switch lets
®
you listen to stereo programs
monauraliy. It is useful in setting the BALANCE
control: just switch to MONO and adjust BAL-
ANCE so that the sound comes from mid-way
between the left and right speakers.
RED GUT SELECTOR
This switch selects which of the programs connect-
ed to the CA-610 will be recorded. It works
independentiy of the INPUT SELECTOR, so that
you can listen to one program while recording any
other, or record directly from one tape deck to
another. At the OFF position the CA-610 is
completely disconnected electrically from the taps
recording terminals. |
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With this you can select either or both of two
separate stereo pairs of speakers — or switch both
OFF to enjoy headphone listening.
HINES Jack Socket
Plugging in headphones does not switch off the
speakers automatically, so use the OFF position of
the SPEAKER switch if necessary.
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BRD Ground] Terminal
Ground terminals of turntable units and other
components used with the CA-510 should be
connected to this GND terminal, particularly if
there is any audible 'hum” problem, Consult your
local electrical dealer If you require detailed
advice.
@ PHONCI Inputs
Connect the pinjack cables from vour turntable
unit to these terminals (the left channel sockets
are uppermost for all CA-B10 input terminals), All
conventional moving magnet, induced magnet,
etc., phono cartridges are suitable. Your dealer can
advise, (See P.8)
© TUNER Inputs
Connect vour FM or other tuner to these termi-
nals, If it has an adjustable output level, adjust this
so that the volume does not change abruptly when
switching from PHONO to TUNER. {See P.O)
ALEX Terminals
Use these terminals to connect a second tuner or
other item of audio equipment, etc. (See P.O)
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RED DLT Terminals
A total of two tape decks can be attached to these
input and output terminals. Model Type E (see
Page 7) is provided with DIN REC/PB sockets.
These are an alternative, and are convenient if you
have a tape deck with similar sockets, and the
necessary connecting cable and plugs. When either
DIN socket is in use, the corresponding pin ter-
minals cannot be used, When not actually record-
ing, protect the CA-G10 against any effect of
unused tape deck input impedances by setting the
RECORD OUT SELECTOR to REC OUT OFF.
Recording will, of course, be impossible.
SPEAKER A/B Output Terminals
The upper set of terminals should be used first for
your ‘A’ speakers, keeping the lower set for a
second set ‘BY.
Spare AD OUTLETS
It your CA-610 is provided with spare AC QUT-
LET sockets (they are not available in certain
areas) vou can plug in other items of audio
equipment. One socket is switched by the CA-610
POWER switch, and is suitable for 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
limits,
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“Stereo Tuner an ; a Tape Deck | - ; o- ` В В B Speaker System | o a - A Speaker System .
The CA-610 can handle two sets of stereo
speakers (A and B), with selection of either, both,
or neither, by the SPEAKERS switch on the front
panel,
The CA-610 is designed for speakers with
impedances between 4 and 16 ohms when can-
nected to either À or B terminals, if both A and B
speakers are operated at the same time, however,
please use only 8 to 16 ohm speakers.
Use the CFF position when listening only to
headphones, which should be plugged into the
front panel jack socket, The speakers are not
automatically disconnected by plugging in the
headphones, and must be switched OFF separa-
tely.
Use speakers which are rated to take the full 40
watts of CA-610 output power, or set the
VOLUME and/or MUTING switch so that the
rated maximum speaker input power is not ex-
ceeded, as indicated on the meter readings. Re-
member that with 4 ohm speakers the reading
must be doubled (Le, if the meters read 20 watts,
the real power is 40 watts), and halved for 16 ohm
speakers.
Making the Speaker Connections
1. Strip the insulated covering from the speaker
connecting cable for approx. half an inch, and
twist any stray ends together. If possible, apply
solder to the exposed half-inch, Push the lever
beneath the terminal as shown in the diagram,
and alon the inner and outer terminal holes.
Then insert the wire fully home. Release the
lever, and the wire end will be fully and firmly
aripped, making a perfect connection.
2. Use the upper {A} speaker terminals first, 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
and defective stereo image, Also be sure to
connect the left-hand speaker to the LEFT
speaker terminals and the right-hand to the
RIGHT terminals,
3, Repeat this with the lower (В) terminals iT a
second pair of speakers is to be connected. In
all cases make sure that connections are fully
and firmly made, or you may not be able to get
any sound from one or more speakers,
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 cartridge output Is connected to the
LEFT {upper} socket, and the right-hand to the
RIGHT {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 VOLUME
well down, and gently lower the cartridge stylus to
the record surface, Raise the volume to the normal
listening level, and note the setting, IT vou leave
the volume normally at this setting, the AUDIO
MUTING switch should be used to reduce volume
when lowering the cartridge. Do NOT lower the
cartridge at normal or high volumes or you may
damage your speakers,
Use the SUBSONIC FILTER to cut out any
tow frequency rumble, and use the BASS and
TREBLE controls to give the most acceptable
tonal balance. At low listening volumes the LOUD-
NESS switch will give a more natural tonal
balance in the ON position.
Connect the tuner output terminals to the
CA-610 tuner input jack sockets using the pin-plug
cable provided. Make sure that the left- and
right hand outputs are connected to the proper
input sockets.
| To enjoy tuner audition, turn the INPUT
SELECTOR switch to TUNER, and operate the
tuner to receive FM or AM broadcasts. If vour
tuner generates unpleasant inter-station noise, use
the AUDIO MUTING switch to reduce this while
you are tuning.
If your tuner is provided with output level
adjustment, use this so that there is no significant
change in listening volume when switching the
INPUT SELECTOR between TUNER and PHONO
settings.
This is a spare input for any stereo source, and
has 150 mV sensitivity {the same as the TUNER
input). Use it for Hi-Fi reproduction of TV sound,
for S-track stereo cartridge tapes, for short-wave
radio reproduction, or for high output level
PHONO cartridges {ceramic or other types — your
dealer will advise). It can also be used with a
microphone mixing amp. for live stereo recordings
if vou have a tape deck.
Si
Two tape decks, 1 and 2, can be connected to
the CA-610 at the same time, Any input source
can be recorded on either 1 or 2, or on both at
the same time. Copying {‘dubbing’) from 1 to 2,
or from 2 to 1, is possible, and you are not
restricted to listening to the source vou are
recording. You can, for instance, listen to the
TUNER while dubbing a friend's tape, or listen to
a record while recording an FM program Tor later
audition.
Using standard pin-plug cables, connect the
LINE OUTPUT terminaís on the tape deck to the
1 TAPE PR terminals, and the LINE INPUT
terminals on the tape deck to the “17 ВЕС OUT
terminals, Repeat with terminals ‘2’ when vou
connect a second deck. Be careful to connect left-
and right-hand channels correctly.
To enjoy tape audition, set the INPUT SELEC-
TOR to TAPE 1 {or 2 as the case may be}, and
operate vour tape recorder for playback. All tone
and other controls on the CA-610 can be used to
give the most acceptable tonal balance.
To make a tape recording on deck 1, 2, or
both, set the REC OUT SELECTOR to the
program source you wish to record (PHONO,
TUNER, or AUX). Recording will then be possible
on deck T and/or 2. 1f you have a three-head tape
deck {most reel-to-reel decks have three heads, but
very few cassette decks dol, you will be able to
‘monitor’ the recording quality, comparing it
directly with the original source, by switching the
INPUT SELECTOR switch between the same
program source and the tape deck (1 and/or 2)
being used,
To dub a recording from tape deck 1 to deck
2 set the REC OUT SELECTOR to TAPE 1 » 2.
The signal played back from 1 will be recordable
on 2. If deck 2 is a three-head type, the quality of
the recording can be monitored while ft is being
made by selecting TAPE 2 with the INPUT
SELECTOR switch. Similarly, use the TAPE 2» 1
position Tor dubbing in the reverse direction,
Tone and other controls have no effect upon
the signal being recorded, Corrections to tonal
balance, etc., must be made during playback.
Only LINE INPUT and OUTPUT pin-jack con-
nections are shown, but where the DIN REC/PB
connector sockets are available, they may be used
instead in the same way, with the one DIN plug
replacing all four pin plugs.
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BLOCK DIAGRAM
SPECIFICATIONS
Continuous minimum rms Dower
{both channels driven, at rated
distortion, from 20 Hz to 20 kHz)
Total harmonic distortion {THD}
intermodulation distortion
Power bandwidth
{IHF both channels driven)
Damping factor
Output terminals
Speaker impedance
Headphone impedance
Signal-tc-noise ratio
(IHF-A network, AUX)
Residual noise
(Pre + main amp, 8 ohms)
Input terminals
Phono
Tuner, Aux
Tape PE (1,2)
\ BLOCK DIAGRAM
FICATIONS
БО + 50 watts {into 4 ohms)
40 + 40 watts (into 8 ohms)
0.05% or less at rated output
0.05% or less at rated output
10 Hz to 50 kHz
Better than 50
A, В, ог А + В {by front panel switch)
410 16 ohms (A or B)
8 10 16 ohms (A + Bl
4 to 16 ohms
90 de
С.М
Sensitivity /impedance
2.5 mv/50 ksz |
150 тп\//БО КО
180 my BO kG
Phono dynamic margin
{at 4 kHz, 0.1% THD)
Chutput terminals
Tape Mec Cui (1,2)
Tone controls
Bass
Treble
Loudness control
With volume at ~30 dB
Subsonic fier
Audio muting
Semiconductors
Power supply
Power consumption
Dimensions (W x Hx E)
Weight
150 mY rms
Level impedance
150 mY/1 kx
+17 dB boost/cut ar 50 Hz
+10 dB boost/cutat TO kHz
+3 dB ar 60 Hz, +5 de at 10 kHz
-3 dB at 25 Hz (12 dBJoct)
-20 de
4 1Cs, 29 Transistors, 13 Diodes
plus 3 Zener Diodes
120 V AC 60 Hz Canada
110, 120, 130, 220, 230, 240 V 50/60 Hz Other Areas
185 watts
(+350 watts max, vla spare AD outlets)
435 x 150 x 288 mm
17-1/8" x 6° x 11-3/47
8 kg (17.6 Ib]
Specifications subject to change without notice.
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Before assuming that your CA-610 is faulty, check the following trouble-shooting list, which details corrective action you can take yourself,
without having to call a service representative.
Fault
Cause
Cure
No power although POWER switeh is ON
POWER LED unlit)
AC power line not plugged into supply socket.
AC main fuse has blown.
No sound although power is connected
Volume set te mes
INPUT SELECTOR in wrong position
Input pin plugs incorrectly inserted, loose, or discon-
nected.
Speaker connections faulty SPEAKER switch in OFF
position
Sound comes only, or mainly, from either L or
H speaker.
Speaker connections faulty
Input connections faulty
Balance contro! not properiy adjusted
Sound suddenly ceases during audition.
The protective circuit has detected +2 V DC at the
speaker terminals, and disconnected them,
AL main fuse has blown.
Plug firmly. into the supply socket.
Heplace fuse and contact service rep. if it blows again,
| Turn up VOLUME,
Check and change as necessary.
Check and insert fully in the correct positions.
Check and make good,
Set to correct position (A, B, or À + BL
Check and make good,
Check and make good.
Set to give correct stereo balance.
Sound will be restored as soon as the fault clears,
IT the fault persists, switch OFF and wait briefly before
switching ON again
Replace fuse and contact.service rep, it It blows again,
Poor bass response and badly defined stereo image
Speaker phase polarity (+ connections) incorrect
Reverse the connections to one speaker {not both},
Aloud ‘humming’ is heard instead of the record
when sttempling phono auction.
| Either the pin-plugs from the phono cartridge are not
firmly plugged into the input sockets, or the braided
shielding wire is defective.
Plug in firmly, replacing the faulty shielding if necessary.
Check and make good the GND (ground) wire.
The VOLUME cannot be raised during record
audition without 2 loud ‘booming noise.
This is caused by acoustic Teedback from the speakers
to the phono cartridge stylus,
The VOLUME is inadequate sven when fully raised.
The AUDIO MUTING switch is ON,
increase the separation between turntable unit and
speakers, avoiding locations directly in line with the
speakers.
| Reduce the VOLUME first, then switch AUDIO MUT-
ING OFF,
Bass and treble frequencies are unnatural and
exaggerated.
The LOUDNESS switch is ON.
Switch OFF excent at low listening levels.
SINCE 1887
NIPPON GAKKICO,, LTD, HAMAMATSU , JAPAN