Brand: DENON
Category: Integrated Amplifier
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for PMA-720/520
Uploaded: April 20, 2026, 8:11 p.m.
Warranty Information
Consult the overseas service centers listed for follow-up service consultation.
1. POWER (Power Switch): Turns the unit on and off. The power indicator (PMA-720 only) and tuner function indicator light up when the unit is on. A built-in muting circuit eliminates noise during operation.
2. INPUT SELECTOR: Selects the program source (PHONO, CD, TUNER, AUX-1, AUX-2).
3. VOLUME: Adjusts the overall volume level.
4. MONITOR/COPY: Used for tape deck recording or copying tapes.
5. PHONES: Jack for connecting headphones.
6. SPEAKERS: Selects between speaker system A, speaker system B, or both.
7. BASS: Controls the low-frequency characteristics of the sound.
8. TONE (PMA-720 only): Enables or disables tone control.
9. TREBLE: Controls the high-frequency characteristics of the sound.
10. SOURCE SELECTOR: Offers options like SUBSONIC (for record players), NORMAL (standard source selection), and CD DIRECT (bypasses input selector for direct CD input).
11. LOUDNESS: Enhances low and high frequencies at low volumes for a more natural sound.
12. PHONO: Selects the cartridge type (MC or MM).
13. BALANCE: Adjusts the balance between the left and right channels.
Troubleshooting and error codes
| Problem | Cause | Solution |
|---|---|---|
| No sound from speakers | Speaker system not connected correctly. | Check speaker connections. |
| Distortion or abnormal sound | Speaker impedance is too low or too high. | Ensure speakers meet impedance requirements (4-16 ohms). |
| Protective circuit activated (output cut off) | Speaker jacks not completely connected or output short circuit. | Turn power off, check speaker connections, then turn power on again. |