Rotel RA 870 Service Manual

Page 1

EChnbal STEREO PRE-MAIN AMPLIFIER

Manual

Table of Contents

Specifications .

PartsList .2
Wiring Diagram .............. . 3, 4
Power Amplifier Bias Adjustment . . . . . . . 4
Schematic Diagram .................. 5, 6

Specifications

Continuous Power Output . 60 watts per channel, min,
RMS both channels driven into
8 ohms from 20 to 20,000 Hz
with no more than 0.03% total
harmonic distortion.

DIN Output ............ 118 watts per channel (1 kHz,
4 ohms, 1% THD)
Power Output (BTL) ....... 120 watts (mono) min. RMS

(When used with (RB-870
power amp.)

driven into 8 ohms from 20 to
20,000 Hz with no more than
0.03% total harmonic distortion
. No more than 0.03% (continuous
rated power output)
No more than 0.03% (continuous
1/2 rated power output)
No more than 0.05% (1 watt per
channel power output, 8 ohms)
No more than 0.05% (continuous
rated power output)
No more than 0.05% (continuous
1/2 rated power output)
No more than 0.05% (1 watt per
channel power output, 8 ohms)
. 8-16 ohms

Total Harmonic Distortion
(20 to 20,000 Hz, from
TUNER)

lntermodulanon Distortion . . .
(60H2:7kHz=4:1)

Output: Speaker . . . . .
Headphone . . . 4-16 ohms
Damping Factor . . . 280 (20 to 20,000 Hz, 8 ohms)
Input Sensitivity/Impedance:
PHONO (MC) ......... 0.2 mV/200 ohms
PHONO (MM) . . 2.5 mV/47 kohms
. 150 mV/47 kohms
150 mV/47 kohms
150 mV/47 kohrns

TAPE MONITOR 1,2 . . . .

THE HOTEL CO. LTD.

RO'IEI. ELEDTRDNICS CO. LTD.

RA-87O

Overload Level (T.H.D. 0.01%, 1 kHz):

PHONO (MC) . 27mV
PHONO (MM) 300 mV
CD, TUNER, TAPE ..... 5V
Frequency Response:
PHONO ............ 20 to 20,000 Hz, $0.2 dB (HIAA STD)
CD, TUNER, TAPE ..... 20 to 30,000 Hz, +0 dB, -1.0 dB
Signal-to-Noise Ratio (IHF, A network):
PHONO (MC) ......... 70 dB
PHONO (MM) ........ 80 dB
CD, TUNER, TAPE ..... 102 dB
MISCELLANEOUS
Power Requirement ....... 120V/60 Hz, 220V/50 Hz, 240V/50 Hz,
or 120, 220, 240V/50-60 Hz (switchable)
(depending on destinations)
Power Consumption ....... 500 watts
Dimensions (overall) ....... 430 (W) x 91 (H) x 317(0) mm
16-15/16" x 3-9/16"x12-15/32
Weight (net) ............ 9.8 kg/21.56 lbs.

0 Specifications and design subject to possible modification without
notice.

0 " Measured pursuant to the Federal Trade Commission's Trade
Regulation Rule on Power Claims for Amplifiers (applicable to the
U.S.A. only).

Serial No.
Beginning

1-36-3 OHOKAYAMA, MEGURO-KU, TOKVO 152, JAPAN
3RD FLOOR, ROTEL BLDG., No.35 FUSHING, NORTH
ROAD, TAIPEI, TAIWAN, REPUBLICK OF CHINA