Toshiba SD-170EKB2 Service Manual page 8

Only DVD disc or only disc except DVD can be played
Only DVD disc, or only disc
except DVD can be Played.
Check the FFC connection
between 24pin and the loader.
Check
output on Collector of Q2, if
pin181 of U1is at low level.
Check whether there is voltage
variance on pin 182 of U1.
Check whether pins of U1 and
peripheral
badly soldered, defected
Go
Yes
laser voltage (2.3V)
Yes
Yes
components
Yes
Check Q2 whether
in good condition
Yes
Change U1 or the loader.
1-5
No
No
No
No
No
are
No
Correct connection
Trouble shooting chart
Check the loaded circuit
Check the solder status on U1 and
peripheral components
check if bad solder exist on U1 and
peripheral components
Replace the bad spare parts