[TechAssist] Projo RCA CTC169 Dead with wrong standby voltages
- From: Warren <warrenca@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 04 Mar 2005 22:47:37 -0500
Hi all!
I will list the work so far:
15 V standby = 14.2
5V standby =4.9V
Raw B+=151V
Regulated B+ is too high I think ...The meter does not like the signal
at TP4101 some times 197V sometimes 1.97V??
Should the Reg B+ be 143V before turn on????
From cathode of CR4106 to Cathode of CR4101 first I had 2 Volts.... Now
after changing diodes I get 3 volts???
Should be under 1 Volt.
Installed a startup kit from Global Q4101, U4101, C4102, C4118, C4108
(47uf) which also was a 47UF before.
My schematic shows 39uf ?? does this make a difference??
Caps were installed first with Q4101 , IC U4101 was installed afterwards.
Also changed C4104(15uf) with also no change.
I also tried to isolate the H out (curiosity) - no change
I've read many tips but most of these point to the parts that I've
already changed.
Can someone brush up my 169 skills.
What am I missing??
Does anyone have a troubleshooting flow chart for the 169?? This would help.
BTW when you push the on button you can see the front led give a slight
single blink.
TIA all !
All tips and comments welcome.
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