I'm looking to make a clone of the F-2856 Driver Amp Circuit Board used in the G-5000, G-6000, and G-7000. The schematic and pictures of the PCB are readily available in the service manuals, but I do not own one of these boards and so cannot determine the physical dimensions of the PCB and locations of any mounting holes. If the picture in the service manual is actual size and the size has actually been preserved through the scanning and printing process (all unlikely), the board looks to be about 104mm by 82mm. I suspect it is larger than that. Can anyone help me out by providing the actual dimensions?
Incidentally, here are some things about this board I noticed (correct me if I am wrong...):
1. There are locations on the PCB for C15, R49, R51, R61, R63 (and their analogs on the other channel), but these components do not actually appear on the schematic. Based on the photos of actual boards I have seen, C15, R49, and R51 are open, while R61 and R63 are jumpers. This is consistent with the circuit shown in the schematic, as far as I can tell.
2. The base ("B") and emitter ("E") markings on TR11, TR12, TR13, TR14 on the "PCB" in Section 3.3 of the G-5000 service manual are backwards. I do not know if those markings are present on the actual PCB or whether they are backwards there too.
Incidentally, here are some things about this board I noticed (correct me if I am wrong...):
1. There are locations on the PCB for C15, R49, R51, R61, R63 (and their analogs on the other channel), but these components do not actually appear on the schematic. Based on the photos of actual boards I have seen, C15, R49, and R51 are open, while R61 and R63 are jumpers. This is consistent with the circuit shown in the schematic, as far as I can tell.
2. The base ("B") and emitter ("E") markings on TR11, TR12, TR13, TR14 on the "PCB" in Section 3.3 of the G-5000 service manual are backwards. I do not know if those markings are present on the actual PCB or whether they are backwards there too.