Fisher MC 3010 Service Manual

Page 1

SERVICE MANUAL

FISHER
MC-3010 ~

INTEGRATED MUSIC SYSTEM
STEREO RECEIVER

WORLD LEADER IN HIGH QUALITY STEREO

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SPECIFICATIONS

FM TUNER SECTION

Usable Sensitivity (IHF Standard)

SuV

Harmonic Distortion (at 400 Hz, 100% Modulation)

Mono 1.0%
Stereo 15%

Signal-to-Noise Ratio (at 100% Modulation &

1mV Input) GOdB
Selectivity 35dB
Image Frequency Rejection (at 88 MHz) 40dB
IF Frequency Rejection (at 88 MHz) 70dB
FM Stereo Separation (at 1 KHz) SOdB
Capture Ratio, IHF, at 1mV 3:18
AM TUNER SECTION
Usable Sensitivity (lHF Standard) S/N 20dB

Loop Antenna 250uV/m
Selectivity (at 1 MHz & :10 KHz) 30dB
Image Frequency Rejection (at1 MHZ) SOdB
IF Frequency Rejection (at 1 MHz) 40dB
AMPLIFIER SECTION
Total Continuous (RMS) Power (at 8 ohms) 10W (5 + 5W)
Harmonic Distortion (at 60 Hz to 15 KHz,

Rated Power) 1.0%
Power Bandwidth, (IHF Standard) 40 7 15,000 Hz

Sensitivities (for rated output power at 8 ohms,

l KHz)/lmpedances

DIAL CORD STRINGING

8 TRACK TAPE DECK ADJUSTMENT

2.5mV/50K ohm
300mV/1M ohm
200mV/100K ohm
1,0mV/600 ohm

Phono (Magnetic)
Phono (Ceramic)
Auxiliary
Microphone

Hum & Noise (below rated output)

Phono (Magnetic) 62dB

Phono (Ceramic) 62dB

Auxiliary 62dB
Frequency Response i2.0dB 40 - I5,000 Hz
Bass Control Range (at 100 Hz) :SdB
Treble Control Range (at 10 KHz) t8dB

Loudness Control (at 40dB volume attenuation

fixed)

+8dB at 100 Hz
+5dB at 10 KHz

TAPE SECTION

Tape Speed (Play 81 Record) 3.75 ips
(Fast Forward) 3,75 ips x 2
Wow and Flutter, maximum 0.2%
Signal-to-Noise Ratio (Play & Record) 40:33
Channel Separation 35dB
Crosstalk 45dB
Distortion 2.0%
Erasure Ratio 55dB
Recording Sensitivity
Microphone 1mV
Auxilian/ 200mV
G ENERAL
AC Power 120V
Frequency 50/60 Hz
Consumption 70 Watts
Dimensions (including control panel, cabinet) 2143/32" W
63/32" H
13-21/32 D

puthv

1. Recommended Test Equipment

at
b.

Two Vacuum Tube Volt Meters
Test tapes RCA-321, Pony-806, or Victor-801
(Track 1 and 3 with 1kHz and track 6 with 8kHz test signals)

2. Head Height Adjustment

a.
b.

c.

d.

Use test cartridge tape (RCA-321 or Pony-806).

Push program selector button to position tapehead to track 2
(on channel 2).

Connect two Vacuum Tube Volt Meters to left and right
channels.

Turn the head height adjust screw slowly counterclockwise or
clockwise and adjust for a null. For correct tapehead position,
make sure there is a peak on either side of the null at the point
where the output is minimum. Glyptol screw after correct
positioning is attained.

e.

Switch to channel 4 and back to 2 again, make sure that the
output on channel 2 is at minimum. Should the output on
channel 2 be greater than on channel 4, repeat adiustments.

Azimuth Adiustment

a.

Use test tape cartridge RCA-321.

b. Set tape player to track 2.

Connect two Vacuum Tube Volt Meters to the left and right
output channels.

Adiust screw (A) with Phillips screwdriver for a balance at
maximum output.

. Glyptol adjust screw after correct positioning is attained.