Quadraflex schematics or s/m?

Have owned a small Quadraflex AC/DC receiver for years - bought new at Pacific Stereo here in San Diego in the late 70's/early 80's. Out of curiosity, I recently acquired two larger AC-only receiver models, the I80R and 450R. Both working reasonably well but stereo light is out on both. The I80R doesn't appear to be pulling FM stereo so it may not be a bulb problem, whereas the 450R audibly does pull stereo on FM but doesn't light the stereo indicator.

Anyway, I understand there is a diyAudio member that can provide some assistance on technical materials for these Pacific Stereo house brand Quadraflex units... I can't PM yet as a newbie but would sure love to hear from anyone that can assist.

Thanks,

John