Troubleshooting - NAD M25 Manual Del Usuario

TROUBLESHOOTING

PROBLEM
NO SOUND
NO SOUND ON ONE CHANNEL
NO SOUND ON SURROUND CHANNELS
NO SOUND ON CENTER CHANNEL
WEAK BASS/ DIFFUSE STEREO IMAGE
SPECIFICATIONS
AMPLIFIER SECTION
CONTINUOUS AVERAGE POWER OUTPUT
INTO 8 OHMS OR 4 OHMS
(Minimum power per channel, 20 Hz - 20 kHz, all seven channels driven, with no more than rated distortion)
Rated Distortion
(THD 20 Hz - 20 kHz)
Clipping power
(Maximum continuous power per channel, all seven channels driven)
IHF DYNAMIC POWER
(Maximum short term power per channel)
8 ohms:
4 ohms:
2 ohms:
Damping factor
(Reference 8 ohms at 50Hz)
Input Impedance
Input sensitivity (for rated output into 8 ohms)
Voltage gain
Frequency response 20 Hz - 20 kHz
Signal / Noise ratio, A-weighted
DIMENSIONS AND WEIGHTS
Net Weight
Shipping Weight
Dimension (W H D)
*Gross dimensions include feet, volume knob, power button and extended speaker termianls.
Specifications are subject to change without notice. For updated documentation and features please log onto
www.nadelectronics.com for the latest information about your M25.
10
CAUSE
• Power AC lead unplugged or power not
switched on
• Speaker not properly connected or damaged.
• Input lead disconnected or damaged
• No surround mode selected
• Mono sound source
• Speakers not properly connected
• Surround volume level too low
• Speaker not connected properly
• Center volume level set too low
• Speakers wired out of phase
>160 W (22.0 dBW)
<0.03%
>180 W
> 220 W (23.4 dBW)
> 385 W (25.9 dBW)
> 485 W (26.9 dBW)
> 180
R = 1 M Ω
C = 180 pF
1250mV+/-50mV
29 dB
±0.2 dB
- 3dB at 3 Hz and 70 kHz
>96 dB ref. 1 W
>118 dB ref. 160W
96.3Ib (43.7kg)
115 Ib (52kg)
Net 17.2 x 7.9 x 18.4"(435 x 200 x 466mm)
Gross* 17.2 x 8.5 x 19.5"(435 x 215 x 495mm)
SOLUTION
• Check if AC lead is plugged in and power
switched on
• Check connections and speakers
• Check leads and connections
• Select a Surround Mode
• Test system with Stereo or Dolby Surround
material
• Check speakers and connections
• Increase surround volume level
• Check speaker and connection
• Increase center volume level
• Check connections to all speakers in the system