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BD 300 (serv.man2) - JBL Audio Service Manual (repair manual). Page 12

Read JBL BD 300 (serv.man2) Service Manual online

 
 
 
 
Can’t read disc or can’t open the disk door
 
 
 
 
 
 
                                                         
 
 
 
 
 
 
 
 
 
 
 
 
 
       
 
 
 
 
 
 
 
 
 
 
     
 
 
I 
 
 
 
 
 
 
 
 
 
 
Yes 
Check the connection 4pin cable from the 
main board
 
Can’t read disc or can’t 
open the disk door 
Check 45pin and 8pin 
 
cable from main board 
connection to the loader is 
normal  
Replace the loader
NO 
GO 
 
Check whether the 
DVD loader running is 
normal
 
Fix the connection the 45pin cable or
8pin cable. 
NO
Yes 
Trouble shooting chart
Check if U11 (pin2) voltage 
is normal (about 9V) 
Fix R946/R947 or check 
U11 (pin3) 
voltage is OK (about 12V)
 
NO
Check R203/R205 are normal 
(the voltage between two 
resistance is 1.5V 
Yes 
Fix  or Replace R203/R205 
Yes 
5- 4
JBL
SB 300 Service Manual
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