Philips MCM2050/05/12, Service Manual

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TECHNICAL SPECIFICATION

           Set DSC to Flat mode 
           Adjust volume to obtain 500mW across 6 ohm load at R/L speaker ouput
           The 500mW will be used as 0dB reference

AUDIO SIGNAL PROCESSING

Micro Hi-Fi  System with PLL Tuner ,USB,  CD-MP3, 10W/ TWO channel Universal Class D Power Amplifier
1 )       DSC ( Digital Sound Control )
           Input sinewave 500mV at 1kHz to R/L channel of MP3 Link socket

Tabel 1a ( Tolerance ± 3dB )

Frequency

DSC Modes with DBB Off   VOL=20

10KHZ

100HZ

DSC  ON

DSC OFF

2 )       DBB ( Dynamic Bass Boot ) 

Play CD testing signal of 1KHZ
           Set DSC to OFF mode and switch off DBB
          Adjust volume level will be as "18"

          Tabel 2 ( Tolerance ± 3dB )

Frequency

DBB OFF

DBB ON

Signal to Noise Ratio ( 0dB,1kHz )

>= 60dBA ( A - weighted )

                                 ( 100 - 16,000 Hz )

>= 55dBA ( A - weighted )

Frequency Response ( 5dB+/- 3dB ), reference 1kHz

100Hz - 16kHz

THD + Noise ( 0dB, 1Khz )

<= 0.3 5

Channel Crosstalk ( 100Hz - 16,000 Hz )

>= 35 dB

                             ( 0 dB, 1 KHz )

>= 40 dB

Output Resistance

< = 1.5 kOhm

Output Voltage RL = 33 k ohm ( )dB, 1 Khz )

83/- 1.5dB

Channel Unbalance

< = +/- 3 dB

GENERAL PART

Measurement are directly done at the connector on CDC board

Description

Specification

TECHNIAL DESCRIPTION

USB

See also SH 190 USB Audio Module (300605)
Measurment are directly done at the coonector on the board