MT201 FM Table display issues

xiao0507 · 2. Februar 2024, 03:53

Hello everyone
I'm here to bother you again. When I turn off the machine, the FM meter reads fine. After turning it on, I tuned it. The pointer only swings in the red triangle area and does not swing to the left. When the correct signal is adjusted, it only indicates the green position. It seems that the indicated frequency is not very accurate. Please give me some advice. Some repair suggestions, thank you very much!

oldiefan · 2. Februar 2024, 19:47

Hello xiao0507,

it is similar to the fault already described here: Saba 9241 fm-rnitte Indicate questions

1. attach DC millivoltmeter between measurement points B5 and B6, switch AFC off
2. adjust exactly to a fm-station so that signal strength is precisely at its maximum
3. adjust P324 in the fm-if box so that the DC millivoltmeter between measurement points B5 and B6 is at 0 (+/- 5) mV.
4. adjust P417 for center indication (zero) at the fm tuning instrument

The fm-tuning indicator should now work correctly.

Best Regards
Reinhard

xiao0507 · 4. Februar 2024, 08:49

oldiefan schrieb:

Hello xiao0507,

it is similar to the fault already described here: Saba 9241 fm-rnitte Indicate questions

1. attach DC millivoltmeter between measurement points B5 and B6, switch AFC off
2. adjust exactly to a fm-station so that signal strength is precisely at its maximum
3. adjust P324 in the fm-if box so that the DC millivoltmeter between measurement points B5 and B6 is at 0 (+/- 5) mV.
4. adjust P417 for center indication (zero) at the fm tuning instrument

The fm-tuning indicator should now work correctly.

saba-forum.dl2jas.com/index.ph…4309f188dd27ef4e6cbbf38dc

saba-forum.dl2jas.com/index.ph…4309f188dd27ef4e6cbbf38dc

saba-forum.dl2jas.com/index.ph…4309f188dd27ef4e6cbbf38dc

Best Regards
Reinhard

Thank you so much! This is what I need! The last adjustment of 9241 was very good!