CTC169 freebie

[Mike]

Someone gave me the bottom chassis half of an RCA PTK169

ok, it had the common failures, such as teh HV block and some caps in the
power supply along with pin diode, cap, and HOT.

Replaced them all, and the chassis works fine.

I want to use this as a video projector, and i got the geometry good, but I
cannot use the customer convergence, because i dont have the front controls.

I need access to the customer convergence, because i need to align the
horizontal position of the tubes.

does anyone have another way around the customer convergence, or have a
wiring diagram for the buttons?

i got the picture aligned vertically, but the horizontal position is off.
and the only way i can see to fix that, is through the user convergence. i
can get to the user convergence through a GE remote from a 19" tv, but it
says use + or - to set. well, it has a + and - on the remote, but it wont
work, it just cycles through the colors.

Any ideas?

 

[Jason D.]

On Sat, 13 Dec 2003 22:07:47 GMT, "Mike" <mbates14@fuse.net> wrote:

Someone gave me the bottom chassis half of an RCA PTK169

ok, it had the common failures, such as teh HV block and some caps in the
power supply along with pin diode, cap, and HOT.

Replaced them all, and the chassis works fine.

Nice job!

I want to use this as a video projector, and i got the geometry good, but I
cannot use the customer convergence, because i dont have the front controls.

The user panel is simple. Ask them to scare up one that comes off any
junked CRT or projector that has CTC169, also this panel is common on
other older chassis as well. If you got the panel version for the TV
CRT, plug this directly to the CTC169 mainboard bypassing the original
adapter w/ IR sensor. Oh, there's two types: one has no latch loop
with round tiny pins uses female black plug. Other one is both white
plug with square pin & holes with latch. Get one that is correct plug
for yours.

I need access to the customer convergence, because i need to align the
horizontal position of the tubes.

There is one but this is very only a red and blue user horizontal &
vertical directional convergance. For detailed convergence, it is the
black panel with so many holes in front of this lightbox for this.
It's grouped by columns and rows in two groups, one for general, one
for quarters for red and blue. The green is fixed and is reference
point for both red/blue to convergence onto.

i got the picture aligned vertically, but the horizontal position is off.
and the only way i can see to fix that, is through the user convergence. i
can get to the user convergence through a GE remote from a 19" tv, but it
says use + or - to set. well, it has a + and - on the remote, but it wont
work, it just cycles through the colors.

The remote code for the 169 is slightly different from newer RCA
chassis which always used 000. Get a RCA unsiveral remote, code in a
101 and this will work or try either GE or RCA codes till you can use
menu functions. Keep in mind this CTC169 isn't a user service
adjustable. Get a set of plastic adjusting sticks from radio shack to
adjust the convergence. Make sure the power supply has capacitors
replaced four of them: 39uF 100V, 15uF 100V, and 2.2uF 100V and 470uF
35V before adjusting the B+ for 143V +/- .5V in standby. Must use RCA
parts for the 15uF and 39uF both 100V. The other two, use typical
high freq 105C caps. The 39uF was running change from original 47uF
to lessen chopper transistor heat.

Be careful, this chassis is partially hot chassis because of this
exposed power supply too crowded into it. Also this is true for ANY
electronics. Good idea to have isolation transformer and double check
that high voltage capacitors has no voltage with meter and are
discharged before repairing on them.

Oh, press menu or few times to get to desired main menu item (there's
usually four of them) then press "+" once or volume up to step off the
desired main menu, then press menu repeatedly to the one you want to
adjust with - and + or volume.

Previous repair shop rebuilt this ctc169 projo I worked on last week
and power supply had blew out again because rebuilder used wrong parts
that were supplied by global whom homebrewed rebuild ctc169 SMPS kit
had three of four caps wrong hence the short life except transistor &
IC were exact replacements. I used IC and transistor, 470uF cap
except I used RCA parts for 39uF and 15uF, 2.2uF 100V caps this
completes the correct rebuild and set came up fine, more reliable than
before.

Do the job RIGHT first time please especially to others who are bit
less famillar with other brands other than their common models. Do
the research and ask here to confirm.

Cheers,

Wizard

Any ideas?

 

[Mike]

i got it.

i experamented with it, and got ahold of some buttons from a monitor, and i
pulled them off, and experimented with the connections. I figured them out,
but its a bit tricky. the very end of the plug is common. its connected to
one side of all the buttons. and the volume, and channel buttons dont get
activated by the common, they get activated by another non-ground lead.

anyway, i figured it out by toying with it, and i got the red and green to
align through customer convergence.

But, I had to reconverge the set with the wave form panel.

so, now the convergence is dead on, except for the upper corner.





"Jason D." <jpero@sympatico.ca> wrote in message
news:3fdbb884.19441907@news1.on.sympatico.ca...

On Sat, 13 Dec 2003 22:07:47 GMT, "Mike" <mbates14@fuse.net> wrote:

Someone gave me the bottom chassis half of an RCA PTK169

ok, it had the common failures, such as teh HV block and some caps in the
power supply along with pin diode, cap, and HOT.

Replaced them all, and the chassis works fine.

Nice job!

I want to use this as a video projector, and i got the geometry good, but
I
cannot use the customer convergence, because i dont have the front
controls.

The user panel is simple. Ask them to scare up one that comes off any
junked CRT or projector that has CTC169, also this panel is common on
other older chassis as well. If you got the panel version for the TV
CRT, plug this directly to the CTC169 mainboard bypassing the original
adapter w/ IR sensor. Oh, there's two types: one has no latch loop
with round tiny pins uses female black plug. Other one is both white
plug with square pin & holes with latch. Get one that is correct plug
for yours.


I need access to the customer convergence, because i need to align the
horizontal position of the tubes.

There is one but this is very only a red and blue user horizontal &
vertical directional convergance. For detailed convergence, it is the
black panel with so many holes in front of this lightbox for this.
It's grouped by columns and rows in two groups, one for general, one
for quarters for red and blue. The green is fixed and is reference
point for both red/blue to convergence onto.

i got the picture aligned vertically, but the horizontal position is off.
and the only way i can see to fix that, is through the user convergence.
i
can get to the user convergence through a GE remote from a 19" tv, but it
says use + or - to set. well, it has a + and - on the remote, but it wont
work, it just cycles through the colors.

The remote code for the 169 is slightly different from newer RCA
chassis which always used 000. Get a RCA unsiveral remote, code in a
101 and this will work or try either GE or RCA codes till you can use
menu functions. Keep in mind this CTC169 isn't a user service
adjustable. Get a set of plastic adjusting sticks from radio shack to
adjust the convergence. Make sure the power supply has capacitors
replaced four of them: 39uF 100V, 15uF 100V, and 2.2uF 100V and 470uF
35V before adjusting the B+ for 143V +/- .5V in standby. Must use RCA
parts for the 15uF and 39uF both 100V. The other two, use typical
high freq 105C caps. The 39uF was running change from original 47uF
to lessen chopper transistor heat.

Be careful, this chassis is partially hot chassis because of this
exposed power supply too crowded into it. Also this is true for ANY
electronics. Good idea to have isolation transformer and double check
that high voltage capacitors has no voltage with meter and are
discharged before repairing on them.

Oh, press menu or few times to get to desired main menu item (there's
usually four of them) then press "+" once or volume up to step off the
desired main menu, then press menu repeatedly to the one you want to
adjust with - and + or volume.

Previous repair shop rebuilt this ctc169 projo I worked on last week
and power supply had blew out again because rebuilder used wrong parts
that were supplied by global whom homebrewed rebuild ctc169 SMPS kit
had three of four caps wrong hence the short life except transistor &
IC were exact replacements. I used IC and transistor, 470uF cap
except I used RCA parts for 39uF and 15uF, 2.2uF 100V caps this
completes the correct rebuild and set came up fine, more reliable than
before.

Do the job RIGHT first time please especially to others who are bit
less famillar with other brands other than their common models. Do
the research and ask here to confirm.

Cheers,

Wizard



Any ideas?