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« on: November 19, 2019, 07:18:39 PM »
So I pulled Q66 2SB754Y and replaced with new and still the same voltages? I tested the one Installed and the one I pulled and they tested good.
old. new
hfe 184 144
Ube 536mv 547mv
Ic. 6.3ma 6.4ma
I popped the collector pin off and Its showing 13Vdc but when installed it drops to 2.4Vdc Im thinking something shorted from the Collector to the TP7?
So I pulled the alignment board from TP7, 8 & 9 and tested continuity of each to ground. TP7 shows continuity but only for around 3 second then stops then shows again 3 seconds ..........! So it only does it under power if I unplug power it doesn't show continuity to ground? so plugged in switch on we have continuity as explained above. unplug with switch on no continuity, plugged in switch off no continuity. So only power and switch on will it show continuity?
Had a friend check his on the phone the same way and he doesn't receive any continuity to ground like I am seeing?