Hello Guys,
I have gotten a lot done the last several days and have the entire 700b back together. Everything checks out, Bias at .360/.360, DC Offset .0001/.0000. Relay board works perfectly. I have everything finished up but I installed a new LED Board, and I have no lights! Of all the things to be dealing with. I have Pad 14 and 15 populated with the low voltage side of the transformer (5.7v each). On/Off switch,and the inputs/potentiometers are working as they should, the 20db switch is fine. I had slight needle jump when I brought the entire assembly up (DBT and Variac) so the front board seems to be fine, except for no lights. It's frustrating to get this far, and one final thing to figure out.
I was looking at the front panel a week ago, figuring what my strategy would be, after initial bring up. I could not figure out what populates Pad 4 on that board, which may be my issue with the lights. I have run a gray wire, as the instructions mention pad 4 uses a gray wire, but where does the other end of that gray wire from Pad 4 go to? I do not see a run on any schematic that I have. The ironic thing with this particular amp is, the original board that I removed worked perfectly, and bulbs lit when the unit was on. I'm tired, been installing a lot today, started with 5 rows of transistors, had one in last night,, so I may need a nudge to see the forest for the trees. If anyone has a suggestion or two, I would appreciate it. I wanted to get the lights sorted out before I start to do any signal tests.
Thank You,
I have gotten a lot done the last several days and have the entire 700b back together. Everything checks out, Bias at .360/.360, DC Offset .0001/.0000. Relay board works perfectly. I have everything finished up but I installed a new LED Board, and I have no lights! Of all the things to be dealing with. I have Pad 14 and 15 populated with the low voltage side of the transformer (5.7v each). On/Off switch,and the inputs/potentiometers are working as they should, the 20db switch is fine. I had slight needle jump when I brought the entire assembly up (DBT and Variac) so the front board seems to be fine, except for no lights. It's frustrating to get this far, and one final thing to figure out.
I was looking at the front panel a week ago, figuring what my strategy would be, after initial bring up. I could not figure out what populates Pad 4 on that board, which may be my issue with the lights. I have run a gray wire, as the instructions mention pad 4 uses a gray wire, but where does the other end of that gray wire from Pad 4 go to? I do not see a run on any schematic that I have. The ironic thing with this particular amp is, the original board that I removed worked perfectly, and bulbs lit when the unit was on. I'm tired, been installing a lot today, started with 5 rows of transistors, had one in last night,, so I may need a nudge to see the forest for the trees. If anyone has a suggestion or two, I would appreciate it. I wanted to get the lights sorted out before I start to do any signal tests.
Thank You,
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