litterbox99
Experienced Member
- Joined
- Aug 8, 2010
- Messages
- 103
I recently acquired a Model 1 26-1001.
PCB ver. 1700069D
One Rom Z33; Motorola "Basic 1" 7814
Not cuts or hacks the the PCB
The video output to the original monitor
is not correct. It's like the horizontal hold
is messed up, no change is seen with keyboard
input or a reset.
The monitor works, I fed it a composite sig
out of a security camera and it displays correctly.
I have not ruled out the analog video output section
but the divider chain is outputting the correct freq(s)
based on the info I have.
Voltages are good as well.
Data/Add lines on the CPU buz with activity.
Before I start chasing my tail, I'm not sure
if the Z3 & Z71 jumpers are correct. From
the docs I've found on the net, there is a
conflict from what I've read.
My PCB is jumper'd as follows;
Z3
open
closed
open
open
open
open
closed
open
Z71
open
closed
open
closed
open
closed
open
open
Are these jumpers documented ?
PCB ver. 1700069D
One Rom Z33; Motorola "Basic 1" 7814
Not cuts or hacks the the PCB
The video output to the original monitor
is not correct. It's like the horizontal hold
is messed up, no change is seen with keyboard
input or a reset.
The monitor works, I fed it a composite sig
out of a security camera and it displays correctly.
I have not ruled out the analog video output section
but the divider chain is outputting the correct freq(s)
based on the info I have.
Voltages are good as well.
Data/Add lines on the CPU buz with activity.
Before I start chasing my tail, I'm not sure
if the Z3 & Z71 jumpers are correct. From
the docs I've found on the net, there is a
conflict from what I've read.
My PCB is jumper'd as follows;
Z3
open
closed
open
open
open
open
closed
open
Z71
open
closed
open
closed
open
closed
open
open
Are these jumpers documented ?