Download  Print this page

Philips DVD580M Service Manual Page 25

Hide thumbs

Advertisement

Diagnostic Software, Trouble Shooting and Test Instructions
5.3.10 Microphone Not Working
No voice from Microphone
Go
Check point : the Q17 on decoder board
Observe : check the collector terminal voltage is +0v7
No
Check point : Q16 on decoder board
Observe : check if the Collector terminal is short circuit to
ground
No
Check point : pin 1 of U205 on power supply board
Observe : check the +5V is presented
Yes
Check point : Microphone input
Observe : check if the any signal presenting at pin 1 of CN205
by hitting the microphone
No
Check point : VA+ and VA- on Microphone board
Observe : check if the supply voltage is + / -- 9v3
Yes
Solution : replace the U401 on Microphone board
5.3.11 Microphone Cannot Sw Off
Cannot turn OFF the voice from Microphone
Go
Check point : Microphone control key on remote control
Observe : press the key and check the voltage changes on
R114
Yes
Check point : collector terminal of Q17 on decoder board
Observe : check the voltage is 0v7
No
Solution : Replace Q17
Solution : replace the transistor
No
Solution : replace the Q16
Yes
Solution : check the +5V supply
circuit, replace any defected
Yes
components
Solution : Replace U205 on power
supply board (karaoke part) if no
Yes
signal output from pin 15
Solution : check the connector
No
between power board and
Microphone board
Figure 5-10
Solution : check if any short circuit at
No
signal link
Solution : check and replace Q16 if
Yes
defected
Figure 5-11
DVD580M
5.
CL 26532085-069.eps
CL 26532085-070.eps
EN 25
180702
180702

Advertisement

Table of Contents

   Related Manuals for Philips DVD580M

This manual is also suitable for:

Dvd580m/691Dvd580m/001

Comments to this Manuals

Symbols: 0
Latest comments: