Service manual

MODEL: L423FR
Page 23
2-3 Audio amplifiers circuits
(R)IC670, IC680, IC6A0, IC6C0 : Single Ended Audio Amplifier IC (MP7720DS : MPS)
This model apply digital Audio Amplifier in order to decrease power consumption.
2 piece is for main sounds, and 2 more piece is for sub-woofer, total 4pcs.
This amplifier voltage is 14V (both AMPVCC(for main) and SAMPVCC(for Sub Woofer)).
2-4. Headphone (J610)
Although the audio signals outputted from amplifier is sent to SPEAKER, between amplifier and
SPEAKER is a headphone terminal. If a headphone is connected, the audio signal to SPEAKER will
be intercepted and a audio signal will be sent to a headphone terminal.
2-5. Speakers
This model has 2.1ch sub woofer speaker system.
The specification of L/R speaker is following table.
No. ITEM SPECIFICATION
1 Nominal Impedance 6 ohms +/- 15%
2 Lowest Resonance 160 +/- 32Hz
Effective / Rated F0~20KHz
Frequency Range OUT PUT SPL-10dB
4Rated Input 8W
5 Maximum Input 10W
The specification of woofer speaker is following table.
No. ITEM SPECIFICATION
1 Nominal Impedance 6 ohms +/- 15%
2 Lowest Resonance 70 +/- 14Hz
Effective / Rated F0~18KHz
Frequency Range OUT PUT SPL-10dB
4Rated Input 12W
5 Maximum Input 15W
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