Sherwood S 7100A Service Manual

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Sherwood S 7100A Service Manual

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Page 1

MDDEL S-TlDOA
STEREO RECEIVER
SERVICE MANUAL

STEREO PHONES

3- For private iIelonIng wIIh

. TAPE DUBIING stereo headphones.
. Permits recording to. or play-

. t In; heck irorn, a second lepe
- recorder. Also. permits duh-
- hing from one recorder to lire
ifl-AM TUNING METER other.
3r precise tuning oI FM or
M smions (tune Ior maxi-
Ium right-hand daflecIIon).

STEnEo INnIcA-ron
IndIcaIes FM slareo broad-
chIS- TUNING

' Coummalauced Ior easy tun-
ing 0! FM and AM station.

LOUDNESS

Masler power ONIOFF and
volume control Iar your speak-
ers. Also aulomalicelly adds
bass compensallon at low
levels.

THING SCALES
'A band marked In MHz. AM
. Ind marked In KHz. See your
pal paper for Iroquency us-
gnmems of your local AM
,Id FM stations,
\ aALANcE
Balances Illa relative volume
levels between your right and

LLECTOH CONTROL
Jail speakers,

elecls your Ilueninn source:
uxiilary, Phone, FM or AM.


TREILE

I... . Increases treble lanes up Io
$13 db, decreases up To -15

I TAPE HONITOR
I Permlu recording lo (up) or
I

plnylna beck mam (down) Iepe
reaffirm: pang!" monllor-
mg n n9 recur Inn. use

Increases hae- Ionu up to
$13 dB. decreeee up In ~13


LOUDIIESS
When depressed. dale-ls loud-

IODE SWITCH nan conlmi campensellon

Depress (or Mona llelenirlg.
or Iar undlng e einnle cinn-
nel sign-l to bolh epuken.

clrcul: (which eulornnlleelly
Increuu besa tone: at low
volume Ievele).

When demented. mule. our
noise hemeen FM alumna.

SPEAKERS

Select: your main eIereo
speakers IA} remoll :Iereo
epeekere 5, both late. or
Iume speak-re e" (for heed-
phone ii-Iening).

SPECIFICATIONS

amplifier:
POWER OUTPUT (IHFI: 70 we-: Imal.

POWER OUTPUT - HMS. bum channels driven:

21 welle X 2 @ 4 ohms, 1 RH:
22 we-: X 2 @ 0 ohm. 1 KHz

5 ohms. 20-20300 Hz
10 wem X 2 B ohml, 40-20300 Hz

HARMONIO DISTORTION: 0.9% @ 9 ohm rend

oulpul. 0.20% @ 10 VIIIII.

INTEHMODULATION DISTOHTION: 1.0% @ 5

ohm ruled output - 0.35% @ lo wma.

STEREO & MONO SPEAKER OUTPUT
IMPEDANCE: 4, 8, or 16 ohrm.

STEREO HEADPHONE OUTPUT: Mail or
law Impedance

STEREO RECORDING OUTPUT: 200 NW, 2K ohm.

POWER BANDWIDTH: 15-50 KHz - 1% Din.

FREQUENCY RESPONSE: Aux, 20-20 KHz i1 :13.

Phone: RIM Std. $1.5 dB.
DAMPING FACTOH- 30:1 @ 8 ohms.
BASS CONTROL: 4; dB @ 100 Hz.
TREBLE CONTROL: $13 68 @ 10 KHz.

INPUT SENSITIVITY (for mad oulpul)
Phone. 1.5 mv.
Auxlliary. 200 mv.

INPUT CAPABILITY FOR 1% din.
Phone: 60 my.
Auxiliary, 3.8 v.

HUM AND NOISE (II-IF): Phone -65 dB.
Aux. -75 dB.
Vol. Control Min. -85 dB.

CROSSTALK: 740 dB (Iii I KHZ.

tuner (Ira):

FM SENSITIVITY (IHF): 1.9 In
(-50 as none l diet.)

SIGNAL-TO-NOISE PATIO: -55 dB.

CAPTURE RATIO: 2.0 an.

SUPPRESSION 0F AM: -50 an.

TUNING RANGE: 57.5 Io 105.5 MHz.

DIS-I'OHTION: 0.5% @ 100% Mod.

SPURIOUS RESPONSE REJECTION: ~57 63.

STABILITY: 1-15 KHz ($0151.)

IMAGE REJECTION: --7e (13.

IF REJECTION: -90 an.

ALTERNATE-CHANNEL SELECTIVITY: so an.

STEREO SEPARATION: 40 dB @ I KHz.

FREQUENCY HESPONSE:2D-15 RH: :1 ae
(STEREO) ,

ANTENNA: 3004mm balanced.

tuner (em):
SENSITIVITY: 5 [IV @ 60% mod. IofB dB SIN.
SELECTIVITV: 7.5 KM: @ --6 dB.
FREQUENCY RESPONSE: -6 dB - 4.0 KHz.
TUNING RANGE: 530 I0 1625 KHz.
IMAGE REJECTION: -40 dB @ 1 MHI.
IF HEJECTION: -40 db @ 1 MHz.
ANTENNA: Ferrite Rod (ruIaIebIe),

High Imp. Inpul.

general:

POWER REQUIREMENTS: 115-125V, 50/60 Hz.
(Expon models. 230W. 1D to 100 walls Iused.

AC OUTLETS: 100 W. $wllchad.

SIZE (Overall): 5%-H, 171/2-W, 13V2"D.

SHIPPING WEIGHT: 30 Lbs.