H.H. Scott 260 Service Manual

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4; * * TI POWDER MILL RD., MAYNARD, MASS., 01754
MODEL 260
SOLID STATE STEREO AMPLIFIER
Tape Output
Pre-Amplifier
Input:
Tape Head - Input Impedance
Signal for Rated Output
S/N Ratio
High Level Inputs - Input Impedance
Signal for Rated Output
S/N Ratio
Frequency Response in Flat Position
Rumble Filter
Loudness Compensation (maximum)
Loudness Compensation
Amplifiers
*Music Power (IHF)
*Steady State (rms)
Total Harmonic Distortion
Frequency Response
Power band width at rated distortion (IHF Method)
Damping Factor
Range of Line Voltage and Frequency
0.5v
200K ohms
47K ohms
2 mv
52 db
47K ohms
3, 5, 9 mv
55 db
50K ohms
-OV
75 db |
20-20 KC + 1.0 db
10 db + 2 db
12 db + 2 db
-4 db/octave: -3 db @ 5K cps
-10 db @ 50 cps + 2 db
+9 db @ 50 cps
+2.5 db @ 10K cps
40 w each channel
30 w each channel
0.8% is
20-20,000 cps + 1 db
20-20,000 cps
20
105-120 v, 50-60 cps
TEST PROCEDURE
Measure
resistance to chassis
in the following
locations: Collector of both
top and bottom
output transistors,
Collector (Top) - Approximately 3000 ohms
Collector (Bottom) - Approximately 1500 ohms
Across Speaker Taps - Approximately 500 ohms
Measure
resistance across
each SR le5 diode
on RX1 scale
- 4.5 to 8 ohms
1. Balance Ad justment
D-260-2