I have a pioneer stereo model SX-251R that was in another shop. When I received the unit the four output transistors were missing. The outputs were Q1 thru Q4. Several people responded to my inquiry. I could use some help again. My hard rive took a dump and I had to replace it and reinstall all my software. I lost all the responses I received on this stereo. Thanks in advance for any help Dave B Happy New Year ------------------------------------------ Help make your TechAssist database better! Submit your fixes here: http://circuitwork.com/techassist/tip/#tips ------------------------------------------ To UNSUBSCRIBE your email address, click here: mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe Or send a BLANK email with unsubscribe in the SUBJECT field to the address above.