SB-026 Service Note on DG-1 10-25-77 It is our experience here in the Compton service facility that the vast majority of DG-1 problems are not component failure, but cold solder connections on the digital circuit board X54-1160-00. The second most frequent problem is dirty Molex connectors between the two circuit boards in the DG-1. Recommended service procedure: Remove both boards. Using a fine point, low wattage iron (45 or less), and a good quality low flux content solder, carefully resolder all component side connections plus the print throughs containing no components. (There are 18 of these points-only one is not accessible from the top, but is located under IC11 and can be resoldered from the bottom.) Resolder the Molex connectors. There are 9 print-thru's where solder may not have flowed thru to the component side. Using a good quality tuner cleaner with silicone lubricant, spray both boards Molex connectors and work the pins in and out 3 or 4 times to insure good contact. Rassemble and final check. Total time on the bench: 20 minutes. We will allow up to 1 hour only if in warranty. JEB:adr (c) 102577TKC