24 Jul
2006
24 Jul
'06
6:28 p.m.
Hello,
I have a Zenith version of the Heathkit 89. Inshipping the tube fell =
back and pulled some wires out of the board. Can you help? I need eith =
a photo or a description of where they go. The wires in question plug =
straight into the back of the tube. That part is fine. I need to know =
where they go on the board. There are 2 browns (still fastened) 1 =
yellow(fastened) green, black, red and white (unfastened) The places =
where they come out of the bard are labeled G1,G2,G,G4 but I don't know =
which wire went to wich board location.
I have the Schematics for the Z89/Z90 in front of me.
The wires from the CRT base all go to the little 'Video Driver Circuit
Board'. According to said sceheamtics, the wiring to the CRT should be :
Brown : FIL to pin 1 of CRT
Brown : FIL to pin 8 of CRT
Yellow : k to pin 7 og CRT
Black : Arc ground
Red : G2 to pin 3 of CRT
White : G4 to pin 4 of CRT
Green : G1 to pin 2 of CRT
Between the video circuit board (the big one flat in the bottom of the
case) and the driver board are the following wires :
P901 is the Molex connector on the driver PCB
Yellow : +53V to P901-3
Orange : +6.2V to P901-5
Gren : G1 to P901-6
White : G4 to P901-8
Red : G2 to P910-10
Black : Gnd1 to P901-4
Bronw : FIL to P901-1
Brown : FIL to P910-2
Let me know if you need more information
-tony