Philips Hudson2 200P3 Service Manual page 30

30
Hudson2 200P3
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5.1.3 PIN ASSIGNMENT OF WAFER TO CONTROL BOARD
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
5.1.4 PIN ASSIGNMENT OF WAFER TO CONTROL BOARD
PIN No. SIGNAL (WAFER 1704)
1
2
3
4
5
6
7
8
9
10
5.1.5 PIN ASSIGNMENT OF WAFER TO PANE
PIN No. SIGNAL (WAFER 1705)
1 GND
2 GND
3 LCM18V
4 LCM18V
5 GND
6 GND
Electrical Instructions (Continued)
SIGNAL (WAFER 1701)
OSD
UP
DOWN
RIGHT
LEFT
AUTO
PIP
SOURCE
DCSW1
MUTEIN
GND
POWER LED
SLEEP LED
PC LED
VIDEO LED
GND
+18V
+18V
GND
GND
AUDIOMUX
AUDIOPW
VOLUME
MUTEOUT
DCSW2
GND
6. Microphone test (B)
The aim of the set-up below is to test whether the microphone is
operating correctly.
Connect the microphone pink plug to a signal measuring equipment
with incorporate DC bias according circuit below:
Place a reference sine wave sound source close to the microphone
openings and check the microphone output for correct output signal.
Please note that the microphone has two openings: One at front and
one at the bottom. The reference sound source should be positioned
in such a way that the sound reaches both openings.
The actual quality of microphone can only be checked by recording and
listening tests, using PC software like Microsoft Sound Recorder
(available in Windows'98/95 Multimedia menu )
Microphone
Test Circuit
+5V
220
2V4 1K