Philips FWT6600, Service Manual

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1-15
GENERAL PART
TECHNIAL DESCRIPTION
Microphone
See also SH 190 testing with 20 to 20k Hz filter,input leven 1mv rms(lim:1.5mv rms) Rs=600ohm output 500mW
Measurment are directly done at the coonector on the board
THD + Noise ( 0dB, 1Khz )vol max
Output Resistance
Output Voltage RL = 33 k ohm ( )dB, 1 Khz )
Measurement are directly done at the connector Microphone(mic1,mic2)
Description Specification
Lim
Microphone Frequency response at
volume 23,input leven 1mv rms,
connect main load
.+=
+=
Remarks :
testing with 20 to 20k Hz filter
USB SPECICFICATION
68%FK
)/)5FK .+=
+=
Issued Date
23-Sep-11
Class No
FWT6600/ All Version
1
3
2
SH 190 -9
Ver
A4
CHECK DATE :
NAME : ZC.ZENG 11 9
dBA
Channel Unbalanceo about( mic1 and mic2)
Unit
dBA
Nom
N/A
8 6
Signal to Noise Ratio ( 0dB,1kHz ) ( A - weighted )
Channel Crosstalk ( ( 0 dB, 63Hz ) )
( 0 dB, 1 KHz )
35
+/- 3 1
dB
dB
dB
±4
ref
±3
N/A
mV
dB ±3
%
mV
N/A
N/A
Max Hum Noise(mic vol max,main vol max) 6 8
550 +/- 20% Microphone Power output( RMS )
Microphone input leven ( Rms)
40
mW
1 1.5 mV
Vol.min=vol1.(mic vol min,main vol 1) 2 4