View Single Post
Old 9th Nov 2019, 11:59 pm   #7
FERNSEH
Dekatron
 
FERNSEH's Avatar
 
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: Sherwood AX-7030R amplifier.

That's the amplifier fixed. The "8volt" transformer is delivering slightly under 10 volts to the bridge rectifiers. There is 10.5 volts across the reservoir capacitor C502.
That short circuit transistor was in fact caused by the collector tab of the 2SC2168 coming into contact with the safety resistor R1711, see second attachment.

DFWB.
Attached Thumbnails
Click image for larger version

Name:	Sherwood_AX7030_5.jpg
Views:	180
Size:	47.6 KB
ID:	193454   Click image for larger version

Name:	Sherwood_AX7030_6.jpg
Views:	214
Size:	76.3 KB
ID:	193455  
FERNSEH is offline