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SHARP ST-1122 Tuner - Lack of illumination

This is my first posting on here so looking forward to hearing from you audiophiles out there.

I have recently inherited a late 1970s SHARP HiFi separates system and I have a question about the tuner please:

Whilst it works and picks up FM & MW broadcasts fine the tuning bar/grid and the two signal displays do not appear to be illuminated ? I currently have the cover off and cannot see any bulbs to replace ?

Any oracles out there that can offer me some help or guidance please ?

KR, Lawrence

Re: SHARP ST-1122 Tuner - Lack of illumination

It appears there are no lamps in that tuner.