Pioneer SX-850 60 Watts / 8 Ohm Receiver, from catalog 1976 – 1978. LED lights replacement with dial repair and cleaning. I will replace caps some other day.
Replaced old 8V 50mA bulbs by 5mm diameter 2700K-3200K Warm White LED’s with resistor. LED’s are quite bright. I measured 14VDC instead of 8VDC as written in manual.
You can also can purchase LED replacements of 8V 300mA T10 bulbs on eBay from seller http://www.ebay.co.uk/usr/cotillion777