Sherwood RD-7502 Service Manual

RD-7502
AUDIO/VIDEO RECEIVER
SAFETY PRECAUTIONS ................................... 1
SPECIFICATION ................................................. 2
VIDEO SECTION ................................................ 5
TUNER SECTION ............................................... 9
BLOCK DIAGRAMS ......................................... 11
WIRING DIAGRAM .......................................... 13
CIRCUIT DESCRIPTION ................................... 14
TUNER ALIGNMENT ....................................... 17
TROUBLESHOOTING ...................................... 18
MECHANICAL PARTS LIST ............................. 21
EXPLODED VIEW ............................................. 22
ELECTRICAL PARTS LIST ................................ 23
IC’S FUNCTIONAL BLOCK DIAGRAMS.......... 30
PRINTED CIRCUIT BOARDS ............................ 39
SCHEMATIC DIAGRAMS................................. 46
CONTENTS
R

Sherwood RD-7502 Specifications

General

Channels	5.1
Surround output	Dolby Digital, DTS
Tuning range	FM: 87.5 MHz - 108.0 MHz, AM: 530 kHz - 1710 kHz
Total Harmonic Distortion (THD)	0.08%
Input Sensitivity	200mV (line)
Signal-to-Noise Ratio	100 dB
Digital inputs	coaxial, optical
Video Connections	composite
Power Output	100W per channel (8 ohms, 20Hz-20kHz, 0.08% THD)
Frequency Response	10 Hz - 100 kHz