eX86
New Member
Some time has passed. In a meanwhile, my crappy Chinese Fnirsi transistor tester started to show funny results on some transistors. Bought new one - Peak Atlas DCA55. Also replaced all the electrolytic capacitors.
Now:
The resistance of R620 and R601 are 16 Ohms (under DBT, the voltages on one end: 22.8 and 22.9V on the other end).
After TR604 (602 on schematic, next to TR601) and TR607 (next to TR606) replacement, I now get output voltages (under DBT, tuner board disconnected):
-14.1V, 5,8V, 14.8V (-12.2V 5.4V, 13V on schematic and -12V, 5V, 13V printed on board).
(First they were: ca -6V, 3.5V, 6V, after replacing TR601 and TR606 with MJE15030: -8.6V. 5.24V and 8.2V).
After connecting the tuner board, still under DBT, I get:
-10.4V 5.2V 10.5V
Is this OK and I'm safe to turn it on without DBT?
Now:
The resistance of R620 and R601 are 16 Ohms (under DBT, the voltages on one end: 22.8 and 22.9V on the other end).
After TR604 (602 on schematic, next to TR601) and TR607 (next to TR606) replacement, I now get output voltages (under DBT, tuner board disconnected):
-14.1V, 5,8V, 14.8V (-12.2V 5.4V, 13V on schematic and -12V, 5V, 13V printed on board).
(First they were: ca -6V, 3.5V, 6V, after replacing TR601 and TR606 with MJE15030: -8.6V. 5.24V and 8.2V).
After connecting the tuner board, still under DBT, I get:
-10.4V 5.2V 10.5V
Is this OK and I'm safe to turn it on without DBT?
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