Rotel RD 945AX Service Manual

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STEREO CASSETTE TAPE DECK

RD-945AX

TECHNICAL
MANUAL

TABLE OF CONTENTS
Specifications ...........
Chassis Layout
Adjustment ..................

PC Board Assy }ans List.
Printed Circuit 8 ards..
Wiring Diagram ...........
Schematic Diagram...
Disassembly Diagram...

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THE HOTEL £30.. LTD.

was, OHOKAYAMA, MEGUROKU, TOKYO 152, JAPAN

HOTEL ELECTRONICS GEL, LTD.

31:2, No.35, FU HSING NORTH ROAD, TAIPEI, TAiWAN, REPUBLIC OF CHINA MN20001925

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Specifications RD-945AX

Heads: Flec/ Play.. ..... Permalloy core

Erase ..... .Ferrite core
Track .............. .4-track / 2-channel
Tape Speed .4.8 cm / sec
Motor .............. .Electric Governer
Wow and Flutter..,. ....0.2 % (DIN) 0.06 % (WRMS)

Distortion (REC/PB, 400 Hz) ....... 2 % (METAL)
Frequency Response (~20 dB):

Normal, LH ............. 30 to 15,000 Hz +/-3 dB
..30 to 16,000 Hz +/-3 dB
..... 30 to 17,000 Hz +/-3 dB
Signal-to-Norse Ratio (WT D. 0 dB = 710 mV. Chromium):

Dolby NR in ................... 64 dB (B Type)
73 dB (C Type)
Dolby NR out ................. 55 dB
Input Sensitivity] Impedance:
LlNE.... ..... 60 mV/ 33 kohms
Output Level mpe ance:
LINE ............................... 710 mV/ 1.5 kohms

Fast Wind Time (C60) ..... 80 seconds

Chassis Layout

Tape Selector BIAS EQUALIZER
Normal, LH.. ...100 % 120 uS
Special.. ...150 % 70 uS
Metal ........... 220 % 70 uS
MISCELLANEOUS
Power Requirement ......... 120 V/ 60 Hz, 220 V/ 50 Hz,
240 V/ 50 Hz (depending on
- destinations)
Power Consumption ...... 30 watts
Dimension (overall) ........ 440 (W) x 121 (H) x 286 (D) mm
17-3/8"x 4-13/16"x 11-1/ "
Weight (net) ....................... 5.6 Kg/ 12.32 lbs

0 Specifications and design subject to possible modifica-
tion without notice

0 Dolby noise reduction and HX PRO headroom exten-
sion manufactured under license from Dolby Labora-
tories Licensing Corporation.
HX PRO originated by Bang and Olufsen. "Dole, the
double-D symbol, and HX PRO" are trademarks of Dolby
Laboratories Licensing Corporation.

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