Bullwinkle
Member
High Speed - question on lamp matrix and transistors
I've been working on a friend's High Speed pin off and on for a while now. I've got it down to only having 2 issues.
The first is that all lamps in row 2 of the lamp matrix are out. I've pushed into the connector (position 2 on 1J6) with a small flat tip screwdriver to make sure the harness isn't the issue. I will be reflowing solder on 1J6. The schematic shows a tip122 for Q81. are there any other components that might need to be looked at?
The 2nd are the left "blue" flashers under the playfield do not fire. I think I see that Q31 is responsible for these (sol 5). Does anyone know the value of Q31? I havent removed the board yet but want to have the parts next time I go over.
Thanks for any help.
Tom
I've been working on a friend's High Speed pin off and on for a while now. I've got it down to only having 2 issues.
The first is that all lamps in row 2 of the lamp matrix are out. I've pushed into the connector (position 2 on 1J6) with a small flat tip screwdriver to make sure the harness isn't the issue. I will be reflowing solder on 1J6. The schematic shows a tip122 for Q81. are there any other components that might need to be looked at?
The 2nd are the left "blue" flashers under the playfield do not fire. I think I see that Q31 is responsible for these (sol 5). Does anyone know the value of Q31? I havent removed the board yet but want to have the parts next time I go over.
Thanks for any help.
Tom