File name EXR-105,XR-3740.pdfEXR-105/XR-3740
SERVICE MANUAL
US Model Canadian Model
EXR-105
E Model
XR-3740
Photo: XR-3740
Model Name Using Similar Mechanism Tape Transport Mechanism Type
NEW MG-25A-136
SPECIFICATIONS
Cassette player section Tape track 4-track 2-channel stereo Wow and flutter 0.08% (WRMS) Frequency response 30 18,000 Hz Signal-to-noise ratio 58 dB Tuner section FM Tuning range Aerial terminal Intermediate frequency Usable sensitivity Selectivity Signal-to-noise ratio Power amplifier section Outputs Speaker outputs (sure seal connectors) Speaker impedance 4 8 ohms Maximum power output 35 W × 4 (at 4 ohms) General Outputs
87.5 107.9 MHz External antenna connector 10.7 MHz 8 dBf 75 dB at 400 kHz 65 dB (stereo), 68 dB (mono) Harmonic distortion at 1 kHz 0.5% (stereo), 0.3% (mono) Separation 35 dB at 1 kHz Frequency response 30 15,000 Hz Capture ratio 2dB AM Tuning range 530 1,710 kHz Antenna terminal External antenna connector Intermediate frequency 10.71 MHz/450 kHz Sensitivity 30 µV
Tone controls Power requirements Dimensions Mounting dimensions Mass Supplied accessories
Power antenna control lead/ Power amplifier control lead/ Telephone mute control lead (XR-3740 only) Rear line out (1) Bass ± 8 dB at 100 Hz Treble ± 8 dB at 10 kHz 12 V DC car battery (negative ground) Approx. 188 × 58 × 184 mm (w/h/d) Approx. 182 × 53 × 164 mm (w/h/d) Approx. 1.3 kg Parts for installation and connections (1 set) Front panel case (1)
Design and specifications are subject to change without notice.
FM/AM CASSETTE CAR STEREO
MICROFILM
TABLE OF CONTENTS 1. GENERAL
Location of Controls ... Getting started ... Setting the Clock ... Adjusting the Sound Characteristics ... Muting the Sound ... Changing the Sound and Beep Tone ... Installation ... Connections ... 3 3 4 4 4 4 5 6
SERVICING NOTES
Flexible Circuit Board Repairing · Keep the temperature of the soldering iron around 270 ° C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat.
2. 3. 4. 5. 6.
6-1. 6-2. 6-3. 6-4. 6-5.
DISASSEMBLY ... 8 ASSEMBLY OF MECHANISM DECK ... 10 MECHANICAL ADJUSTMENTS ... 13 ELECTRICAL ADJUSTMENTS ... 13 DIAGRAMS
IC Pin Function Description ... |