SERVICE MANUAL
FM/AM (MW/LW) CASSETTE CAR STEREO
US Model
Canadian Model
XR-M550
AEP Model
UK Model
XR-M500R
SPECIFICATIONS
XR-M500R/M550
Photo: XR-M550
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MG-25E-136
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol ; are trademarks
of Dolby Laboratories Licencing Corporation.
– Continued on next page –
Cassette player section
Other specifications
AUDIO POWER SPECIFICATIONS (US model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
19 watts per channel minimum continuous average power into
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more
than 1% total harmonic distortion.
Tape track 4-track 2-channel stereo
Wow and flutter 0.08 % (WRMS)
Frequency response 30 – 20,000 Hz
Signal-to-noise ratio
Tuner section
FM
Tuning range 87.5 – 108.0 MHz (XR-M500R)
Antenna terminal External antenna connector
Intermediate frequency
10.7 MHz/450kHz
Usable sensitivity
8 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio 66 dB (stereo),
72 dB (mono)
Harmonic distortion at 1 kHz
0.6 % (stereo),
0.3 % (mono)
Separation 35 dB at 1 kHz
Frequency response 30 – 15,000 Hz
MW/LW (XR-M500R)
Tuning range MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Aerial terminal External aerial connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity MW: 30 µV
LW: 40 µV
AM (XR-M550)
Tuning range 530 – 1,710 kHz
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity 30 µV
Dolby NR off
61 dB
58 dB
Dolby B NR
67 dB
64 dB
Cassette type
TYPE II,
TYPE I
IV
87.5 – 107.9 MHz (XR-M550)
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