Go Back TV - Video - Vintage Television & Radio Forums > Solid State CRT Televisions

We appreciate your help

in keeping this site going.
Thread Tools Display Modes
Old 09-27-2017, 04:27 PM
rcafan rcafan is offline
VideoKarma Member
Join Date: Jun 2010
Location: West Bloomfield, MI
Posts: 121
Ctc 46 service data

Help , need schematic and service data for rca ctc46 color set.
Reassembled set and have brightness locked full with no adjustment.
Reply With Quote
Old 09-28-2017, 09:49 AM
Findm-Keepm's Avatar
Findm-Keepm Findm-Keepm is offline
Followin' the Rules...
Join Date: Jun 2007
Posts: 2,825
While I don't have the print, or an RCA manual to share, I do have my notes for the early XL100s. There is a diode off one end of the Brightness Control - it's a little glass diode, and may be behind the chassis, off a stake on PW300. It shorts, and Brightness becomes un-adjustable. RCA issued a goldenrod for it - their notation is CR103, and it is electrically tied to pin 9 of the MAL001 module. The other end connects to the low resistance (470 or 680 ohm) resistor off the Brightness control.

Also, make sure the ACM switch (if equipped) isn't the problem - cycle it through on-off a few times. I've gone on service calls where a dirty ACM switch was the only problem.

The CTC44, 46 and 48 are all very similar - most of the MA_ series module chassis are 75% compatible, with the later CTC60-CTC72 being the least alike, with Horizontal and Vertical sweep changes.

BTW, the July 1971 PF Reporter has the "intro" to the early XL100 sets:

USN RET (Avionics / Cal)
CET- Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"

When fuses go to work, they quit!
Reply With Quote
Old 09-28-2017, 09:56 AM
zenithfan1's Avatar
zenithfan1 zenithfan1 is offline
Join Date: Jan 2008
Location: Kenosha, Wisconsin
Posts: 4,165
Hope ya don't mind, I moved this to a more appropriate section.
My TV page and YouTube channel
Kyocera R-661, Yamaha RX-V2200
National Panasonic SA-5800
Sansui 1000a, 1000, SAX-200, 5050, 9090DB, 881, SR-636, SC-3000, AT-20
Pioneer SX-939, ER-420, SM-B201
Motorola SK77W-2Z tube console
McIntosh MC2205, C26
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 05:38 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
ęCopyright 2012, All rights reserved.