[TechAssist] Re: Projo RCA CTC169 Dead with wrong standby voltages
- From: Eric Manuel <tvman@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 05 Mar 2005 21:29:02 -0330
Hi Warren some tips here may help Eric
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Category Manufacturer Model Problem Solution
TELEVISION RCA P46100 UNIT SHUTS DOWN PROBABLE
CAPACITOR C4401
BY COLLECTOR OF Q4401 SHORTED
TELEVISION RCA P46100 SHUTDOWN C4401 BAD VALUE
TELEVISION RCA P46100 The blue Tint had shifted to the right
of
the green. The red had Q8132
TELEVISION RCA P46100 DEAD (IN SHUTDOWN) REPLACE C4401
LOCATED
OFF COLLECTOR OF Q4401
TELEVISION RCA P46100 BLUE TINT SHIFTED TO RIGHT OF GREEN &
RED
SHIFTED TO LEFT REPLACE Q8132 IN CONVERGENCE ASSEMBLY
TELEVISION RCA P46100 ARCING NOISE (ODOR OR SMELL COMING FROM
SET) REPLACE IHVT SPLITTER ASSEMBLY
TELEVISION RCA P46100 DEAD (NO STANDBY VOLTAGE) REPLACE
SHORTED
CR4101 & R4003 33K & R4149 RESISTORS INCREASED IN VALUE
TELEVISION RCA P46100 Arcing noise. Odor/smell coming from
the
set. Traced the fault to the IHVT splitter assembly.
TELEVISION RCA P46100 Set was going into x-ray shutdown
Capacitor C4401 off the collector of transistor Q4401 (horz output)
Add New 1 of 1
Eric Manuel
E M Electronics
Deer Lake Nfld
Canada
tvman@xxxxxxxxxxxxxxx
Warren wrote:
> Ron
> Here is the exact numbers
> Mod. P46100TN
> Chassis # CTC169HN
> Also on the back PTK169HNA C
> Warren C
>
> Ron Miller d.b.a. Country TV wrote:
>
>
>>Is this a DV or PRJO? You need to provide complete model and chassis
>>numbers.
>>Country TV
>>Ron Miller
>>Inez, TX. 77968
>>
>>----- Original Message -----
>>From: "Warren" <warrenca@xxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>
>>Sent: Friday, March 04, 2005 9:47 PM
>>Subject: [TechAssist] Projo RCA CTC169 Dead with wrong standby voltages
>>
>>
>>
>>
>>
>>>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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>>
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