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Old 21st Jun 2021, 9:20 am   #15
DMcMahon
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Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 6,604
Default Re: Uher CR 210 Cassette Recorder Check Out

Have now worked out what the lamp is.

On the schematic there is an 8V 40mA lamp shown within a green sectioned area, there are also in/out connections to this green area from K3, K4 and another contact. The green areas are normally PCBs/section of PCBs but this particular section is not identified.

One side of the lamp connects to ground and the other side connects out to contact K2. With contact K2 made/closed the +9.7V supply will be switched through to the lamp.

The giveaway clue to the identified sectioned PCB is that its external connections are numbered in the 900's and the external connections shown on the Automatic reverse impulse transmitter PCB are also numbered in the 900's, so the unidentified green section is part of that PCB.

The schematic lists K2 location as "at the volume control" and User manual says that when the Volume control is pressed in, it will illuminate the cassette inspection window (the PCB is situated below this), now of course remember this lamp from the CR 240.

Pressing the volume control does illuminate the lamp.

David
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