Rotel RB 970BX Service Manual
This is the 9 pages manual for Rotel RB 970BX Service Manual.
Read or download the pdf for free. If you want to contribute, please upload pdfs to audioservicemanuals.wetransfer.com.
Extracted text from Rotel RB 970BX Service Manual (Ocr-read)
Page 1
RDTEI-hffi'
STEREO POWER AMPLIFIER
RB-97OBX
TECHNICAL
MANUAL
TABLE OF CONTENTS
Alignment .........................................................................................
Specifications .....
Chassis Layout ..........
Printed Circuit Board .....
Schematic Diagram...
Wiring Diagram ................ ..
PC Board Ass'y Parts List .................................................................
m'uu'ab'NI-A-a»
1-36-8, OHOKAYAMA, MEGURO-KU. TOKYO 152, JAPAN
RDTEI. ELECTRONICS (313.. LTD.
3F-2, No.35. FU HStNG NORTH ROAD, TAIPEI, TAIWAN, REPUBLIC OF CHINA
Page 2
Specifications
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.
110 watts per channel (1 kHz, 4 ohms, 1% THD)
...30A (0.1 ohms, 10-usec, 1 pulse)
Continuous Power Output .....
DIN Output .....................................
Peak Current ..............
Power Output (BTL)....
180 watts (mono) min. RMS driven into 8 ohms from 20 to
20.000 Hz with no more than 0.03% total harmonic distortion.
Total Harmonic Distortion ............................ No more than 0.03% (continuous rated power output)
(20 to 20,000 Hz) No more than 0.03% (continuous 1/2 rated power output).
No more than 0.05% (1 watt per channel power output, 8 ohms).
Interrnodulation Distortion ............................ No more than 0.05% (continuous rated power output)
(60 Hz : 7 kHz= 4:1) No more than 0.05% (continuous 1/2 rated power output).
No more than 0.05% (1 watt per channel power output, 8 ohms).
Output (Speakers) ....................................... 8 ohms min (bridged mono mode); 4-16 ohms (stereo mode)
Damping Factor 280 (20 to 20,000 Hz, 8 ohms)
Input Sensitivity/Impedance ..... 1.0 V l 27 kohms
Ovenoad Level (T HD 0.5 %, 1 kHz) ...... 5 V
Frequency Response ................................... 15 to 100.000 Hz, +0 dB. -1.0 dB
Signal to Noise Ratio (IHF, A network) ......... 116 dB
GENERAL
Power Requirement ..................................... 120 V/60 Hz, 220-240 V/50 Hz (depending on destination)
Power Consumption 300 watts
Dimension (overall) ..................................... 440 (W) x 92 (H) x 334 (D) mm
17-3/8" x 3-5/8 x 13-3/16"
Weight (net) ................................................. 6.8 kg / 15.0 lbs
' Measured pursuant to the Federal Trade Commission's Trade Regulation Rule or, Power Claims for Amplifiers
(applicable to the USA only).
NOTE: Specifications and design are subject to possible modification without notice.
Power Amplifier Bias Adjustment
Instruments: DC milli-voltmeter
Notes: Prior to Bias Adjustment, run about 5 minutes with rated output
(8 ohm) and warm up Power Transistor and Heat Sink.
Set Volume Control to minimum.
Coupling
Step Adjust Adjust for
Plus Lead Minus Lead
1 TP1 TP3 VR601 DC milli-voltmeter
reads 8 mV
2 TPZ TP4 VR602