[TechAssist] Re: Projo RCA CTC169 Dead with wrong standby voltages
- From: Warren <warrenca@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 06 Mar 2005 14:17:04 -0500
thank's I will Check Monday!
Warren C
Philstv@xxxxxxx wrote:
>There's a 3 volt zener that causes problems like this in the primary.
>Phil Solarz
>RAC - National Product Service
>Phil's Electronics
>C.E.T. GNN3799 - FMIC
>734-718-0301
>
>In a message dated 3/4/2005 10:49:45 PM Eastern Standard Time,
>warrenca@xxxxxxxxx writes:
>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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