Adjustment And Checks; Amplifier Section - Teac GF-600 Service Manual

GF-600
● 0 dB is referenced to 1.0V.
● Load impedance:
SPEAKERS: 6 ohm (40W or more)
PHONES: 1k ohm (1/4W)
● Specified input level: -3dB (AUX)
● VOLUME position: VOL 20
● Unless specified otherwise,measurements are made in PHONES jack
Oscillator
AUX IN
L
R
3.1

AMPLIFIER SECTION

ITEM
1.AUX input sensitivity
2.Harmonic distortion
3.Frequency response
4.S/N ratio
5.Maximum output power
4

3 ADJUSTMENT AND CHECKS

SPEAKERS
GF-600
PHONES
6 ohm
6 ohm
Fig.3-1 Basic test setup
INPUT SIGNAL
(AUX IN)
1KHz /-3dB
1KHz /-3dB
40Hz,100Hz,20kHz
No signal
1KHz
Distorion
1k ohm
S1
AC voltmeter
1k ohm
SPECIFICATIONS
-4 +/-3dB
1.0% or less
40Hz: 9 +/-3dB
100Hz: 7 +/-3dB
20kHz: 3 +/-3dB
50dB or better
THD:10% or less
Oscilloscope
Analyzer
REMARKS
Reference output level
Reference level:1kHz
Ratio of reference output
level to noise
VOLUME: MAX