manuals.online logo
Brands
  1. Home
  2. •
  3. Brands
  4. •
  5. Lafayette
  6. •
  7. Stereo Receiver
  8. •
  9. Lafayette LR-9090 User manual

Lafayette LR-9090 User manual

Other manuals for LR-9090

2

Other Lafayette Stereo Receiver manuals

Lafayette LR-9090 Instruction and safety manual

Lafayette

Lafayette LR-9090 Instruction and safety manual

Lafayette LR-9090 User manual

Lafayette

Lafayette LR-9090 User manual

Lafayette LR-120DB Instruction and safety manual

Lafayette

Lafayette LR-120DB Instruction and safety manual

Popular Stereo Receiver manuals by other brands

Teac AG-680 Service manual

Teac

Teac AG-680 Service manual

Kenwood KR-V888D instruction manual

Kenwood

Kenwood KR-V888D instruction manual

Teac AGV1050 owner's manual

Teac

Teac AGV1050 owner's manual

Sony STR-435 operating instructions

Sony

Sony STR-435 operating instructions

Pioneer Elite SC-68 Service manual

Pioneer

Pioneer Elite SC-68 Service manual

Pioneer SX-1250 operating instructions

Pioneer

Pioneer SX-1250 operating instructions

Marantz CINEMA 70S owner's manual

Marantz

Marantz CINEMA 70S owner's manual

Kenwood KMDX92 instruction manual

Kenwood

Kenwood KMDX92 instruction manual

Yamaha RX-830 owner's manual

Yamaha

Yamaha RX-830 owner's manual

Pioneer AVH-Z7250BT owner's manual

Pioneer

Pioneer AVH-Z7250BT owner's manual

Denon AVR-1311 owner's manual

Denon

Denon AVR-1311 owner's manual

Denon AVR-S760H owner's manual

Denon

Denon AVR-S760H owner's manual

Denon AVR-X7200W Service manual

Denon

Denon AVR-X7200W Service manual

Sony XAV-1500 operating instructions

Sony

Sony XAV-1500 operating instructions

Radio Shack DX-399 owner's manual

Radio Shack

Radio Shack DX-399 owner's manual

Sony STR-DE535 - Fm Stereo/fm-am Receiver operating instructions

Sony

Sony STR-DE535 - Fm Stereo/fm-am Receiver operating instructions

Pioneer SX-1000TA operating instructions

Pioneer

Pioneer SX-1000TA operating instructions

Yamaha MusicCast TSR-5B3D owner's manual

Yamaha

Yamaha MusicCast TSR-5B3D owner's manual

manuals.online logo
manuals.online logoBrands
  • About & Mission
  • Contact us
  • Privacy Policy
  • Terms and Conditions

Copyright 2025 Manuals.Online. All Rights Reserved.

Laffi*tt
Laby*tt
Laffi*tt
Lafdett
LR-9('9('
AM/FM
Stereo Receiver
e[!e
OWNER'S MANUAL
Lahy*tt
Model LR-gOgO
lStock. No. 99-0367bW1
AM/rN
DOLBY SYSTEM
STEREO RECET\'ER
DC
DC nrrro "DoLBy" ARE TRADE MARKS oF DoLBy LABoRAToRTEs
:
!
.i
'.
,*
',f;
$
$
4
g
s-
ii
*
.,t
h
4
*
BECAUSE ITS PRODUCTS ARE SU.&IEg,T TO gOryT]NUd{,s :INNPNOVEMENT, THE LAFAYETTE
RADIo ELEcTRoNIcs coRPORATTON RESERVES THE'R*&+lT TO MAKE DESIGN CHANGES OR
MODIFICATIONS AT ANY TIME WITHOUT INCURRING ANY OBLIGATION TO INCORPORATE THEM
IN PRODUCTS PREVIOUSLY SOLD.
jI
j
{
..i
$
'n
$
L.ia
i;
EIill: OofrGlrt co'rtldlrtD @lttr lYtltlwrtr mDrc :rECrloXl0t 00lt0mll0X o tlo3rlt, L,l.' IJl. llttt r lll ll3lll3 lEtElUlo
CONTENTS
GENERALDESCRIPTION.... ....,4
INSTALLATION.. ...,....5
ACPower ......5
ConvenienceOutlets ....b
GroundConnection .....5
ANTENNAS ...... .. 5
AM.. ...5
FM .'..b
CONNECTING YOUR ASSOCIATED EOUIPMENT .. ,......7
Loudspeakers .....: ...g
StereoHeadphones. .....10
ConnectingStereoRecordPlayers .......10
StereoTape RecorderConnections .......10
Connecting an 8-Track Tape player . . . lz
DESCRIPTION oF RECETVER CONTROLS. ........12
OPERATING PROCEDURES ... ".." "17
Tuning ln FMStereo .....17
lnterference On FM . ra
Reducing Noise On FM Stereo . . . . 1g
Adjusting Phono lnput Sensitivity On The Receiver . . . ,n
StereoTapeRecorderOperation . . . .rr
Recording/Playback using one tape recorder . . . . .21
Simultaneous Recording [tworecordersconnected] .....21
Duplicating [tworecordersconnected] .......21
Playback ltwo recorders connected] . - . r,
8-TrackTapePlayerOperation ....22
MicrophoneOperation .....22
BassandTurnoverswitchAction .....- .r2
PowerOverload ProtectionCircuit .......24
TROUBLE-SHOOTING GUIDE ........24
RETURNING THE UNIT FOR SERVICE . .....25
Shippinglnstructions .....2s
TECHNICALSPECIFICATIONS. .....26
INSERTS: tll schematic Diagram/rnterior parts Location/pc Board Diagrams
121 Operating Chart
t31 Front Panel Operating Controls/Connections to Associated Equipment.
GENERAL DESCRIPTION
The Lafayette 9090 is a highly sophisticated solid-state stereophonic high fidelity receiver that
combines an AM tuner, a highly sensitive FM stereo tuner, and a high quality integrated stereo
amplifier in one single, handsomely styled unit.
The receiver not only offers all the advantages expected from solid-state circuitry such as instant
operation, low current consumption, and cool operation, but also provides extremely low distortion
and noise, plus wide frequency response at its full rated power to ensure the finest sound repro-
duction.
Stereo inputs have been provided for reproduction from a wide variety of external program sources
that you may wish to use -record players, tape recorders, tape players, etc.
Some of the special features that have been incorporated in this receiver to ensure a high degree of
performance and to provide complete flexibility of operation are as follows:
* 75 ohm and 300 ohm antenna inputs for FM.
r. Sensitive dual-gate MOS FET in the FM RF section with 4-section variable capacitor.
x Three 2-element ceramic filters used in the IF section for high selectivity.
ac PLL [Phase Lock Loop] IC used in the FM stereo decoder section for optimum stereo per-
formance with minimum distortion.
x A newly-developed IC functioning as an IF amplifier, a low-distortion Quadrature FM detector,
a driver for the tuning meters, and as a sophisticated FM muting circuit which not only elimi
nates noise between stations on FM in the conventional manner, but also silences the receiver
when not properly tuned to a station.
x Dual Meters used - a conventional signal strength meter plus an FM center-tuning meter for
precise tuning.
x Built-in Dolby Noise reduction circuit for decoding Dolby FM broadcasts.
x Two sets of magnetic phono inputs accommodating a range of cartridge output levels from
2.5 mV to 360 mV [for rated power output].
x Stereo microphone input controlled only by a mic level control for convenient mixing with
other program sources.
x Two-position turnover frequency switches for Bass and Treble controls.
x Direct-coupled OCL power amplifier stages.
x Amplifier output stages protected by a dual system of relay and electronic overload protection
circuitry.
r, Quick-connect output terminals for up to three sets of stereo speakers.
x 2-position 12 dB/octave Low Frequency Filter switch [15 or 4OHz].
x 2-position 12 dBloctave High Frequency Filter switch 17 or 12 KHzl .
r. Dual Tape Monitoring facilities plus special dubbing switch to permit recording from one tape
recorder onto another in either direction.
In order that you may benefit from the many operating and performance features designed into this
receiver, we recommend that you carefully read all the instructions contained in this manual. Also,
we suggest that you keep the manual close at hand and in a safe place so that you can refer to it
when necessary.
4
INSTALLATION
The unit may be used in any convenient location such as an equipment cabinet shelf, table or
bookcase. The amount of heat generated by this unit is small compared to vacuum-tube equipment.
Even so, provision must be made for some ventilation in order to disperse the small amount of heat
that is generated. Do not place books or other objects on top of the unit so that the ventilation
slots are obstructed. Do not place near radiators or other sources of heat.
AC POWER
The receiver is designed to operate from a power source of 105 - I20 votts, 50/60 Hz AC. Do not
attempt to use the receiver on any other power source or damage will result.
CONVENIENCE OUTLETS
Three convenience outlets are provided at the rear of the receiver. The unswitched outlets should
be used to supply AC power to equipment such as a record player and tape recorder. The switched
outlet is controlled by the power on-off switch on the receiver and should be used for equipment
you wish to operate simultaneously with the receiver [a transistorized indoor FM antenna or
booster, for exhmple. Note that neither of the unswitched outlets are protected by the AC fuse in
the receiver.
GROUND CONNECTION
A ground screw at the teceivet's rear [marked GND] provides for optional connection between the
receiver and other Hi Fi components that may be used in a system [such as a record player]. In
many cases, this connection aids in the reduction of hum.
ANTENNAS
AM ANTENNA
The ferrite loopstick built into the rear of the receiver assures adequate reception of all local AM
stations.. However, in the fringe areas, high noise areas, or where surrounding metal objects interfere
with normal reception, a 20 - 30 foot length of insulated antenna wire can be connected to the
terminal designated AM [See Figure 1-A].
NOTE: The ferrite loopstick is mounted on a swivel bracket. For maximum signal pickup, the
loopstick should be swung out-away from the chassis-and adjusted for best reception.
FM ANTENNAS
The antenna is the single, most important factor in obtaining good, distortion-free FM reception.
The finest, most sensitive receiver will not operate properly if it is fed with a poor FM signal. You
should therefore give careful consideration to the selection of an antenna for your receiver if you
want the best results -particularly for FM stereo reception.
In areas reasonably close to the transmitter, you may be able to use an indoor antenna system such
as a simple folded dipole constructed of 300 ohm twin lead, or a "rabbit ears" antenna similar to
the type sometimes used for TV reception. For the very best FM stereo reception, the use of an
outdoor antenna is highly recommended. These are available in various types [See the Lafayette
catalog]. For reception of stations scattered in many directions, a non-directional type of antenna
may have to be used. If the desired stations lie mostly in one direction, a highly directional type
will provide better results. When using a directional antenna, always orient it for best reception of
the desired station. The correct position will be indicated by a maximum reading of the "SIGNAL"
tuning meter on the receiver.
AM ANTENNA
DIRECTION OF STATION t- FM
73n
ANTENNA
[email protected] GND AM
OUTDOOR
FM ANTENNA
TO FM ANTENNA_
FIGURE 1.A AM
FM
300 oHM
TWIN LEAD AM ANTENNA
(20 - 30 FT INSULATED WIRE)
EXTERNAL ANTENNA AND 3OO OHM
EXTERNAL ANTENNA CONNECTIONS
r--FM
75!L
ANTENNA
GND AM
INNER
CONDUCTOR
INNER
CABLE
CLAMP
##sffi
112" - 3/4"
w, ,------"'- INsuLATIoN
SHIELD
BRAID
75 OHM
-COAXIAL
CABLE
1. Remove approx 1-114" of outer insulation from cable.
2. Remove all but 3/8" of the shield braid.
3. Remove inner insulation, leaving 3/16" of the insulation exposed.
The center conductor should be approx 1/2" long.
FM ANTENNA CABLE CONNECTIONFIGURE 1-B 75 OHM
If you presently use an outdoor TV antenna, it can sometimes be used to provide good reception of
FM stations. Simply make a connection between the stereo receiver and TV antenna iead-in, using a
2-set antenna coupler [See Lafayette catalog] . You should remember, however, that some TV an-
tennas are designed to attenriate signals in the FM band to minimize interference on TV from FM
stations [the FM band is located between channels 6 and 7] . In such cases, it will be necessary to
install a separate FM antenna [this may be installed on a lower part of the TV mast] .
FM ANTENNA CONNECTIONS
300 Ohm Connection
When 300 ohm lead-in is used from the antenna, connection to the receiver should be made as
shown in Figure 1-A [to the two terminals marked 300Sl ].
75 Ohm Connection
In areas subject to electrical interference from vehicles, power lines, etc., the use of 75 ohm shielded
cable as a lead-in to the receiver may result in a reduction of the interference. The use of ?b ohm
shielded cable is also required in amplified distribution systems. The 75 ohm lead-in cable to the
receiver is connected as shown in Figure 1-B. Prepare the end of the cable as shown, loosen the
cable clamp [2 screws], then slip the shield braid section under the clamp. Wrap the center [inner]
conductor around the 75O screw terminal and tighten the screw firmly. Now secure the cable
clamp tightly against the shield braid section by means of the two clamp screws.
CAUTION: Make sure that no strands of shield braid come into contact with the Tba terminal
since this will short out the antenna input signal.
Note that 75 ohm cable cannot be connected to the 300 ohm output of a booster amplifier, or a
300 ohm coupler or splitter. Nor can it be connected directly to a 300 ohm antenna, unless a 800 -
75 ohm matching transformer is used at the antenna. Antennas and booster amplifiers with Tb ohm
outputs will present no problems, of course. If you intend to couple the 75 ohm cable to an exist-
ing 75 ohm feeder line, be sure to use a 75 ohm coupler [available from Lafayette] .
CONNECTING YOUR ASSOCIATED EQUIPMENT
WARNING: DO NOT ATTACH OR REMOVE CONNECTING CABLES WITH RECEIVER
SWITCHED ON.
LOUDSPEAKERS
GENERAL
This stereo receiver is equipped with three sets of speaker output terminals, set "A SPEAKERS",
set "B SPEAKERS" and set "C SPEAKERS".
For conventional stereo operation in your main listening area, the left and right speakers [stereo
speaker set "A" as shown in Figure 2] must be connected to the terminals marked "A SPEAKERS".
If you wish to connect a second or third set of speakers in other locations, stereo speaker set "B"
and stereo speaker set "C" must be connected to the applicable set of speaker terminals marked
"B SPEAKERS" and "C SPEAKERS".
Selection of speakers is determined by the position of the "SPEAKER MODE" Switch'
6-10 Fr APARr--+l
.--1sreneospenren /\
LEFr \ ) sEr,,A,, ( / nrcHr
SPEAKER "\ I- SPEAKER
\i
\/
OPTIMUM STEREO SPEAKER LOCATION
SO THAT SOUND IS FOCUSED ON LISTENER
FIGURE 2 STEREO SPEAKER POSITIONING
(MAIN LISTENING AREAI
SPEAKER CONNECT!ONS
Figure 4 illustrates three sets of stereo speakers connected to the receiver. If you intend to use only
one set of speakers for normal stereo, simply connect the two speakers to the Left and Right
speaker terminals marked "A SPEAKERS".
Figure 3 shows the method used to connect the speaker leads to each set of terminals. To connect a
lead, remove approximately 3/8" of insulation from its end and twist the bare strands of exposed
wire together. Press the lever on the terminal and insert the bared section of the lead into the
opening, as shown. When the lever is released, the lead will be held securely. Be sure to observe
correct polarity; the positive [+] terminal on the speaker must be connected to the [+] receiver
terminal [red lever] and the negative [-] terminal on the speaker connected to the [-] receiver
terminal [black lever] in each case.
The second set of stereo speakers [set "B"] when used as extension speakers in a remote location
must be connected to the Left and Right speaker terminals marked "B SPEAKERS".
A thfud set of stereo speakers [set "C"] may be used in another room. These speakers must be con-
nected to the Left and Right speaker terminals marked "C SPEAKERS".
8