Sony TA-F70 User Manual

CARE OF YOUR AMPLIFIER
TROUBLE CHECKS
The following chart will help correct most troubles which may oc-
cur with the unit. If the trouble persists after you have made these
checks, consult your Sony dealer.
Before going through the check list of specified troubles below,
first refer back to the “CONNECTION DIAGRAM” on page 5 and
“INITIAL OPERATION” on page 8.
No audio and the PEAK POWER LEVEL indicators not lit
@ Check that the ac power cord is plugged into a working outlet.
No audio but the PEAK POWER LEVEL indicators light
@ Check speaker and program source connections.
@Check the settings of the MONITOR and FUNCTION switches.
@ Check the SPEAKERS selector setting.
@Turn up the volume.
Abrupt loss of sound from one or both of the speakers *
@ Check the speaker terminals or speaker cord for a short.
@ Check for a connected audio component which might generate a
de content that affects the amplifier.
@ Remove any object on the top of the cabinet which might prevent
normal air circulation.
No TONE contro! adjustment
@ Depress the TONE switch of the SIGNAL PATH switches.
No tape recording
@ Check that the TAPE COPY selector is set at SOURCE.
No tape copying
@ Check the TAPE COPY selector to see if it is correctly set.
Reversed left and right sound
@ Check the speaker cord connection and speaker location.
Lack of bass sound or obscure instrument position
@ Check the speaker connection for proper phasing.
Severe hum or noise
@ Use shielded connecting cords.
@ Keep the connecting cords away from transformers or motors
and at least 3 meters from TV sets and fluorescent lights.
@ Ground the amplifier.
Rustling noise
@ Make secure connections.
eWipe the plugs and jacks with a cloth lightly dampened with
methanol.
An intermittent mechanical noise is slightly audible after the unit
has been run at high volume levels
@ This condition is inherent in the heat-pipe design and is not a pro-
blem.
*This symptom may be caused when the protection circuits activate.
CLEANING
Clean the cabinet, panel and knobs periodically with a soft cloth.
If finger prints, food and beverage stains, etc. are difficult to
remove, use a cloth moistened with a mild detergent solution. Do
not use any type of scouring powder, abrasive pad or solvent, since
these will damage the cabinet.
12
SPECIFICATIONS
Amplifier section
Continuous RMS power output
(Less than 0.007% At1kHz
THD, both channels 90 + 90 watts (8 ohms)
driven simultane- At 20 Hz - 20 kHz
ously) 90 + 90 watts (8 ohms)
According to DIN 45500
90 + 90 watts (8 ohms)
Power bandwidth (IHF)
5 Hz - 30 kHz
Harmonic distortion Less than 0.007% at rated output
Less than 0.003% at 10 W output
Intermodulation (IM) distortion
(60 Hz: 7 kHz = 4: 1)Less than 0.007% at rated output
Less than 0.003% at 10 W output
Frequency response PHONO 1, 2 RIAA equalization curve
+0.2 dB
TUNER
AUX
TAPE 1, 2
Less than 100 yV (8 ohms, Network A)
100 (8 ohms, 1 kHz)
) DC - 100 kHz *?dB
Residual noise
Damping factor
Inputs
Maximum input S/N
Bony capability (weighting
Sensitivity | Impedance | (9 ag7e distor | network,
tion, 1 kHz) input level)
PHONO 1, 2
(PASS) 2.5 mV 50 k ohms goomv | 88 dB (A, 2.5 mV)
(40 Q) 0.125 mV 100 ohms 15 mV __ | 78 dB (A, 0.26 mV)
(3.2) 0.125 mV 33 ohms 15 mV 78 dB (A, 0.25 mV)
TUNER
AUX 150 mV 50 k ohms — ree nag)
TAPE 1,2 Gs
Outputs REC OUT 1, 2
Voltage 150 mV
Impedance 4.7 k ohms
SPEAKER A, B
Accepts speakers of 8 - 16 ohms.
HEADPHONES
Accepts low and high impedance
headphones.
Tone controls BASS
+10 dB at 25 Hz (turnover frequency
250 Hz)
TREBLE
+10 dB at 50 kHz (turnover frequency
5 kHz)
Low filter 12 dB/octave attenuation below 15 Hz
(operative only for phono input signals)
General
System Preamplifier section: low-noise head
amp; direct-coupled, NF type
equalizer amp; CR type tone control
Power amplifier section: pure-comple-
mentary SEPP de power amplifier with
all stages direct coupled
Power supply section: pulse-power
supply circuitry ; two regulated
power supplies (for head amp and
preamp)
Semiconductors 6 ICs, 6 FETs, 78 transistors, 56 diodes
Power requirements European model:
220 V ac, 50/60 Hz
United Kingdom model :
240 V ac, 50/60 Hz

Sony TA-F70 Specifications

General

Brand	Sony
Model	TA-F70
Category	Amplifier
Language	English