10 Feb
2014
10 Feb
'14
8:07 p.m.
I measured the resistance of the flyback transformer as of four Ohms. From my point of
view this is a proper value.
Andreas
Gru?
Andreas Holz
Am 10.02.2014 um 20:01 schrieb Seth Morabito <lists at loomcom.com>:
* On Tue, Feb 04, 2014 at 10:00:41PM +0100, Andreas
Holz <aswood at t-online.de> wrote:
Hello all,
I'm looking for DEC vt101 schematics and maintenance manual.
I've a vt101. The power supply and logic board is ok. All power
levels and video signals are supplied to the video board properly,
but there is no dispay on the crt and I'm suspecting that the video
board is defective.
The flyback transformer is a prime suspect as well. There were two
versions of flyback transformer on the VT100/101: a potted version,
and a version with exposed coil windings. The version with exposed
windings has a much higher failure rate.
If your flyback transformer is bad, you can buy a new (not NOS,
actually new) flyback transformer for around $25!
http://tkc8800.com/page/VT100-Flyback-transformer-replacement
Andreas
-Seth