Philips HTS5000W/12, Service Manual

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EN 42 HTS5000W 9. Exploded View & Module PWR 04-01 Non-Wireless
Module PWR 04-01 Non-Wireless (For Information Only)
1 Overview - introduction
This wireless audio ampli
fi
er is a Stereo 2 x 50 Watt class D ampli
fi
er for use in Wireless Audio Sets. The FR4 PCB is build up with
through hole components and SMD 0603, 0805 components. Volumecontrol is done with a unidirectional serial signal from the receiver
towards the M62429 volumechip. A black extruded AL heatsink (4°C/W) is mounted on the ampli
fi
erchip with 2 screws. On board is
also all conditioning for the wireless receivermodule from Freesystems. Power supply and interfacing from / to the receiver is done with
a 16 pole FFC
fl
exlink. Also on board are 2 LEDS to indicate the operating condition of the ampli
fi
er.
2 Electrical speci
fi
cation
Rated Power 2 x 50W in 6 Ohm @ 10%THD maximum (FTC)
Sensitivity (2 x 50 W) 0.5 V RMS input for 50Watt into 6 ohm / see annex 1: FTC - power
THD <0.1% at 1/8 P rated ( each channel separately measured)
Frequency response
fl
at between 30Hz - 20kHz // +/- 1 dB
Phase Input and output in phase
Typical DC – supply + 27 VDC / -27 VDC & 6VDC
Load output 6 ohm - Both channels should be loaded with 6 ohms to avoid
audioholes
Mute input Active low
Standby input Active low
Leds Green = playmode or muted // red is standbymode
Standby output to SMPS active high (6V unloaded) = SMPS in standbymode
Input impedance < 20K ohm both channels
Output of ampli
fi
er is short circuit proof
No audible plops at power on or power down
Operating temperature: 0 to + 45 °C
Storage temperature -25 to + 80 °C
Pcb material FR4 / 2 layers / 0603, 0805 & through hole / Dimensions 90 x 100 mm
PB – free components and full pB free processing
3 Key components
class D ampli
fi
er: TDA8920BTH / Philips Semiconductor
output
fi
lter: 22 μ H / 470nF polyester
Conditioning preamp: NJM4560 / JRC
Volumechip: M62429 / Renesas – Mitsubishi
3V3 regulator: MC78FC33 / Motorola
Connectors : all JST except speakerconnector
Output to speakers: Easyconnector LQR3215-0102F / SMK