Nice to have people. Hope I can pay it back someday.
Mike
Search found 5 matches
- Sun Nov 09, 2008 7:13 am
- Forum: General Discussion
- Topic: Scoping the primary of a switching power supply. fuses blow
- Replies: 6
- Views: 3098
- Sat Nov 08, 2008 8:15 am
- Forum: General Discussion
- Topic: Scoping the primary of a switching power supply. fuses blow
- Replies: 6
- Views: 3098
Scoping the primary of a switching power supply. fuses blow
Do I need to power the TV through an isolation transformer? Fuses blow when I hook the scope ground to the chassi ground side of the switching power supply. Been getting back into service work again and I forgot the right way to scope the primary of the switching power supply. I think years ago, the...
- Tue Nov 04, 2008 4:13 pm
- Forum: General Discussion
- Topic: Zenith TV Schematics z32x31d
- Replies: 1
- Views: 1539
Zenith TV Schematics z32x31d
Trying to find Schematics for a Zenith z32x31d TV. Preferrably on line.
- Sun Nov 02, 2008 4:47 pm
- Forum: General Discussion
- Topic: JVC dead set
- Replies: 12
- Views: 5378
What killed the zener??
Bigglez, A reasonable and viable question... The connector (cnooc) is not connected to anything and is internal to the cabinet of the TV. The set has never been serviced and is about 4 yrs old. The bad diode was on the SCL1 line of the connector. If not a spike on the connector, then a huge spike on...
- Sun Nov 02, 2008 6:02 am
- Forum: General Discussion
- Topic: JVC dead set
- Replies: 12
- Views: 5378
JCV AV-27WF35 dead set
Wanted to pay it back to others who post helpful info on line. I am an EET, not a tv service tech (so I needed help with how this TV worked). I had a dead set, turned out to be D708 (5.6v zeener diode) was pulling down pin 53 of IC201 (uP) to a 2.5v level with + & - spikes. 3 out of 50 times the...