September 8, 2026
We received in this cool Roland monochrome monitor, dating from the early 80’s, with a complaint of picture-reduced-to-a-single-horizontal-line. Our tech team diagnosed the problem as a failed UPC semiconductor integrated circuit in the vertical deflection circuit.
The technical background: vertical deflection current moves the picture tube’s electron beam up and down on the picture tube interior/TV screen. The UPC chip, a 10-pin single in-line package, handles vertical sync, vertical oscillation, and waveform shaping on a single chip. Incredibly, even by the 1980’s these chips already included temperature-control circuits to counter temperature changes and ensure stable operation.
We sourced the chip and priced the repair. Customer approved our repair quote, part was ordered and installed; monitor was tested and checked in good working order.
Another one bites the dust at Bammel Technology Services.









