Hi!
I'm restoring an F6B(European model), the power supply kicked out the bucket. A cap at the regulator part blown up(C604), killed some transistors around it.
Already replaced all caps, measured all transistors, I still have to check all resistors and diodes(but at first look they seems to be fine).
The original 2SC2023-Os at the inverter are fine, also Q605, Q606, Q607, Q608 are ok.
The problem in the regulator part is with an R grade 2SC2023 (Q613), 2SC1810 (Q602), 2SA911 (Q603). I suspect that I should change all transistors in the regulator, at least Q601/Q613 to the same.
I have a few 2SC2023 (without R or O) but still doesn't find any info about the lettered versions, so don't know whats the difference and why it is only R type allowed in the regulator and R or O at the inverter. Also if I change 601/613 to simple 2023, would it affect the other part of the power supply?(sadly I don't have that kind of deep knowledge about electroics or SMPS/PLPS)
Found some old datasheet for 2SC1810 but nothing for 2SA911.
It would be a really big help if someone could advice some replacements for 2SC2023R, 2SC1810, 2SA911. Maybe I could get some new old stock from the last two from eBay, but I would prefer some common off the shelf part.
I know there was a thread a long-long time ago with similar topic, but exact working replacement parts wasn't clear at the end.
Attached the schematic from the service manual, marked the bad transistors.
I'm restoring an F6B(European model), the power supply kicked out the bucket. A cap at the regulator part blown up(C604), killed some transistors around it.
Already replaced all caps, measured all transistors, I still have to check all resistors and diodes(but at first look they seems to be fine).
The original 2SC2023-Os at the inverter are fine, also Q605, Q606, Q607, Q608 are ok.
The problem in the regulator part is with an R grade 2SC2023 (Q613), 2SC1810 (Q602), 2SA911 (Q603). I suspect that I should change all transistors in the regulator, at least Q601/Q613 to the same.
I have a few 2SC2023 (without R or O) but still doesn't find any info about the lettered versions, so don't know whats the difference and why it is only R type allowed in the regulator and R or O at the inverter. Also if I change 601/613 to simple 2023, would it affect the other part of the power supply?(sadly I don't have that kind of deep knowledge about electroics or SMPS/PLPS)
Found some old datasheet for 2SC1810 but nothing for 2SA911.
It would be a really big help if someone could advice some replacements for 2SC2023R, 2SC1810, 2SA911. Maybe I could get some new old stock from the last two from eBay, but I would prefer some common off the shelf part.
I know there was a thread a long-long time ago with similar topic, but exact working replacement parts wasn't clear at the end.
Attached the schematic from the service manual, marked the bad transistors.
