Echostar LT8700 No Picture

garga pista

garga pista

Member
Messages
17
My Satellite Setup
Amiko Alien SHD-8900, Amiko Ampulse WiFi, Nokia D-box
Dishes:Astra19,2-HotBird-Intelsat/Thor
My Location
Hungary
Hello!
I'm trying to repair an LT-8700 receiver, looking for a schematic or service manual, or just an advise. It works "halfway". The receiver boots up, front panel display and remote works, but no picture output. No picture, nor OSD on the TV scart, RCA plug, or on the modulator.
The receiver had D2mac and Videocrypt decoder boards, I've removed both, it works without that 2 panels, but still no picture.
But on the VCR scart i can get "sparklies", changing the channels seems working, but no OSD on the VCR scart :(
But if a connect an another receiver on the VCR scart, the receiver switches to it, on the decoder phono out comes out the picture (still without osd).
PSU works, all the voltages measured correct. Does someone has any advice? I've made some pictures from the inside, it looks interesting, that there's a vertical panel in the back with 3 connectors. From the 3 connectors, one has a lot of cables running different places in the main board. Is this normal, or is it retrofitted?

IMG_20200522_190115.jpgIMG_20200522_190122.jpgIMG_20200522_190140.jpgIMG_20200522_190148.jpg
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
29,657
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK
You may find the fault is a switching transistor on the main board, diverting signals through the decoder boards when a particular encryption was received.

Have you tried working your way - blind - through the menus to perform a factory reset ?
 
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