CMB747 - Car stereo SENDAI - Free user manual and instructions
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| Product Type | Car Stereo / Receiver |
| Brand | Sendai |
| Model | CMB747 |
| Chassis Size | Single DIN (180 x 50 x 160 mm) |
| Weight | Approx. 1.0 kg |
| Power Supply | 12V DC (Negative Ground) |
| Maximum Power Output | 4 x 50 Watts |
| Radio Bands | FM / AM |
| FM Frequency Range | 87.5 – 108 MHz |
| AM Frequency Range | 530 – 1710 kHz |
| Preset Stations | 30 (18 FM + 12 AM) |
| Disc Playback | CD / CD-R / CD-RW |
| USB Playback | Yes (MP3, WMA) |
| AUX Input | 3.5 mm Front Panel |
| Bluetooth | Yes (Hands-free, Audio Streaming) |
| Display Type | LCD (Monochrome, Backlit) |
| Audio Features | EQ Presets (Rock, Pop, Classic, Flat) |
| Remote Control | Included (Wired / Infrared) |
| Maintenance | Wipe with dry soft cloth; avoid solvents |
| Safety | Fuse rating: 10A (ATC/ATO blade) |
| Spare Parts | Fuse, Wiring Harness, Mounting Sleeve |
| Repairability | Replaceable fuse; professional service for other issues |
Frequently Asked Questions - CMB747 SENDAI
How do I set the clock on the Sendai CMB747?
Press and hold the CLK button for 2 seconds until the hour digits flash. Use the VOL knob to adjust the hour, then press CLK again to set minutes. Press CLK once more to confirm.
Why is there no sound from my speakers?
Check that the unit is turned on and volume is not at minimum. Verify speaker connections and ensure the mute function is off. Also check the fuse (10A) in the back of the unit.
Can I connect my phone via Bluetooth?
Yes. Enable Bluetooth on your phone and search for devices. Select 'Sendai CMB747' and enter passcode '0000' if prompted. Once paired, you can stream music and make hands-free calls.
How do I reset the radio to factory settings?
Press the RST button (or a small reset hole) on the front panel using a pointed object, such as a pen tip. The unit will restart and all settings will be cleared.
What audio file formats are supported via USB?
The USB port supports MP3 and WMA files. Ensure the USB drive is formatted as FAT32. The file system should not contain too many folders or files; we recommend a maximum of 999 files.
How do I improve FM radio reception?
Ensure the antenna is fully extended and properly connected to the antenna jack on the back of the unit. In weak signal areas, try adjusting the antenna position or using a higher quality antenna.
Can I play CDs on the CMB747?
Yes, the unit plays standard audio CDs, CD-Rs, and CD-RWs. Insert the disc with the label facing up. If the disc is not recognized, check for scratches or dirt.
What is the fuse rating and how do I replace it?
The fuse is rated at 10 amps (ATC/ATO blade type). To replace, disconnect power, pull out the old fuse from the holder on the back of the unit, and insert a new one of the same rating.
How do I clean the front panel?
Use a soft, dry microfiber cloth to gently wipe the panel. Do not apply liquids or abrasive cleaners, as they may damage the surface or seep into controls.
Why does my Bluetooth disconnect intermittently?
Ensure your phone is within range (typically 10 meters) and there are no obstructions. Try unpairing and pairing again. Also check for interference from other electronic devices in the car.
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