Hi...
I've got two diodes that need replacing, which I think they are zeners. I don't have a schematic.
One is marked C33PH and the other B8V2PH. Google search results turns up references to "marking codes" and zeners, but I can't find any data.
These are in a Philips 27PT6441/37 TV set, and are marked as "6001" and "6006" on the chassis.
Any help identifying these would be muchly appreciated.
Ken
I don' see a part in the parts list for that set with the location number
6006, but if it is a zener it is likely 8.2v. The 6001 diode is a 33v zener.Leonard
On Fri, 25 Jul 2008 14:17:26 -0500, "KenB123" put finger to keyboard and composed:
Here's one possibility:
BZY85B8V2 8.2V 1W (PH = Philips)
The C33 looks like a 33V zener. The size should suggest its wattage.
Try searching for "BZ*C33" here:
If the C33 is a tuning reference diode, then it would probably be more precise than an ordinary zener.
If it helps, your set appears to be using an L041UAA chassis.
BTW, a *lot* of people are having trouble with that chassis:
- Franc Zabkar
-- Please remove one \'i\' from my address when replying by email.
Yes, it is that chassis. The 6006 diode is next to a capacitor marked 2006. Odd part numbering system, huh?
And I did find many complaints about this model TV. It's probably not worth fixing, but fixing things is sort of a hobby of mine. It was given to me for free at a yard sale.
Thanks for all the help!
Ken
Yes, it does connect to the tuner.
Ken
It is a 33 volt zener in the supply to the tuner and is not a very critical value. It is not a tuning diode.
Leonard
On Sat, 26 Jul 2008 11:25:18 -0500, "KenB123" put finger to keyboard and composed:
FWIW, my Sanyo set uses a uPC574J 33V tuning voltage reference. It has a low temperature coefficient (+/- 1mV/degC) and low dynamic resistance (10 ohms). If your set uses a regular 33V zener (which has a 30mV/degC tempco), then I guess the design of its AFT circuitry is such that it can pull the channel in over a wide range of temperatures. I haven't had to look at a tuning zener for a long time so I don't know which approach is used most often today.
- Franc Zabkar
-- Please remove one \'i\' from my address when replying by email.
SUCCESS! Since I did not have a dime invested in this TV I substituted
9-volt and 30-volt zeners found in the parts box. And it is now working! Thanks for all the help, guys. I've got me a TV for my bedroom now, for as long as it lasts.Ken
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.