Sherwood RX-4109 Service Manual

RX-4109
AM/FM STEREO RECEIVER
- BLOCK DIAGRAM - MECHANICAL PARTS LIST
- WIRING DIAGRAM - EXPLODED VIEW
- CIRCUIT DESCRIPTION - ELECTRICAL PARTS LIST
- TROUBLESHOOTING - IC'S FUNCTIONAL BLOCK DIAGRAM
- TUNER ALIGNMENT - SCHEMATIC DIAGRAMS
◑ CONTENTS ◑
SERVICE MANUAL

Sherwood RX-4109 Specifications

Amplifier Section

Power output	2X100 W
Total harmonic distortion	0.04 %
Intermodulation distortion	0.02 %
Input sensitivity (Phono)	2.5 mV
Input sensitivity (Line)	200 mV
Signal to noise ratio (Phono)	70 dB
Signal to noise ratio (Line)	95 dB
Frequency response (Phono)	±3 dB
Frequency response (Line)	±3 dB
Output level	200 mV
Bass/Treble control	±10 dB

FM Tuner Section

Tuning frequency range	87.5~108 MHz
Usable sensitivity	15 dBf
50 dB quieting sensitivity	25.2/45.2 dBf
Signal to noise ratio	68/65 dB
Total harmonic distortion	0.5/0.8%
Frequency response	±3 dB
Stereo separation	40 dB
Capture ratio	4 dB
IF rejection ratio	80 dB

AM Tuner Section

Tuning frequency range	520~1710 kHz
Usable sensitivity	800 μV/m
Signal to noise ratio	40 dB
Selectivity	25 dB

General

Power supply	120 V~ 60 Hz
Power consumption	2.5A
Dimensions	440×138×370mm
Weight	8.85 kg