Archived from groups: rec.games.pinball (More info?)
*long*
I have a strange issue with my displays on my Williams Time Warp. I
have been through a lot with this machine, so here is where I am now:
* I am able to power the game on and the games goes into attract mode
* I can start a game and play an entire game (no lockups/resets)
* All swicths, lamps, and solenoids work
* Sound works
* My score displays have strange and missing numbers
* I had another working system 6 machine (which I have since sold) that
I swapped driver boards with and the displays worked fine -- the only
exception was the leftmost digit on player 1
* In test mode (with the *bad* driver board) I started the display test
(w/o the fuse for the 100 V displays) and let it run for a few hours.
I returned and all the displays were correct
* I turned the machine off, replaced the fuse, and when I turned the
machine on My score displays are missing every other digit -- except #1
which does not display anything and #3 which displays ___8_8
*** Whenever the 5 bank drop targets are reset (solenoid fired) or the
right eject hole is activated, the score displays flash the correct
digits for a split second -- except for #1 which is blank
* All voltages on the power board are correct
* All test points on the CPU board checked OK (including the blanking
signal
* I replaced the 40 pin interconnect on both the CPU and Driver board
* Pin 37 on the interconnect is receiving 5V (blanking)
* I resoldered all of the male headers on the CPU and Driver board
(removed old solder and replaced with new solder)
* I checked ALL of the transitors on the driver board and I replaced 3
transistors that were out of range on the driver board
* I checked solenoid banks 3 and 6 on the driver board again also
checking to make sure the 3 resistors were OK
* I replaced the solenoid PIA chip on the driver board
* I do not have a logic probe, but I have tested the 7180s using my DMM
and they are testing OK
* The brown wire on 4J7 (Display board) is receiving ~100V, the grey is
receiving ~5V
I know I have checked some other things but I cannot remember at the
moment. Is there something I am overlooking?
Thank you!
-- Mark
*long*
I have a strange issue with my displays on my Williams Time Warp. I
have been through a lot with this machine, so here is where I am now:
* I am able to power the game on and the games goes into attract mode
* I can start a game and play an entire game (no lockups/resets)
* All swicths, lamps, and solenoids work
* Sound works
* My score displays have strange and missing numbers
* I had another working system 6 machine (which I have since sold) that
I swapped driver boards with and the displays worked fine -- the only
exception was the leftmost digit on player 1
* In test mode (with the *bad* driver board) I started the display test
(w/o the fuse for the 100 V displays) and let it run for a few hours.
I returned and all the displays were correct
* I turned the machine off, replaced the fuse, and when I turned the
machine on My score displays are missing every other digit -- except #1
which does not display anything and #3 which displays ___8_8
*** Whenever the 5 bank drop targets are reset (solenoid fired) or the
right eject hole is activated, the score displays flash the correct
digits for a split second -- except for #1 which is blank
* All voltages on the power board are correct
* All test points on the CPU board checked OK (including the blanking
signal
* I replaced the 40 pin interconnect on both the CPU and Driver board
* Pin 37 on the interconnect is receiving 5V (blanking)
* I resoldered all of the male headers on the CPU and Driver board
(removed old solder and replaced with new solder)
* I checked ALL of the transitors on the driver board and I replaced 3
transistors that were out of range on the driver board
* I checked solenoid banks 3 and 6 on the driver board again also
checking to make sure the 3 resistors were OK
* I replaced the solenoid PIA chip on the driver board
* I do not have a logic probe, but I have tested the 7180s using my DMM
and they are testing OK
* The brown wire on 4J7 (Display board) is receiving ~100V, the grey is
receiving ~5V
I know I have checked some other things but I cannot remember at the
moment. Is there something I am overlooking?
Thank you!
-- Mark