People do not like: solved problem with stereo, with tuning and memory channels! All great works, ...
The only problem that still bothers me is when I answer the main potencijometar for VOLUME to the end (at max) music or speech selected channel (station) is somewhere around 30% (to 1/3) of the maximum ?! Otherwise even this might add, when the input for CD player (recorder) Turn on the DC / DVD player or tuner, the receiver works fine, it means that everything is OK! but when I press the button for the tuner muzuka memorized channels immediately falls to 1/3 of the maximum. So I need some help in order to solve this problem and even your receiver to make it all OK!
currentflow, means if: to return L101 at about 7V to TP1 and TP2 (as before, when he worked mono) and with a trimme R201 to adjust the stereo (see post 11)
Thanks in advance!
The only problem that still bothers me is when I answer the main potencijometar for VOLUME to the end (at max) music or speech selected channel (station) is somewhere around 30% (to 1/3) of the maximum ?! Otherwise even this might add, when the input for CD player (recorder) Turn on the DC / DVD player or tuner, the receiver works fine, it means that everything is OK! but when I press the button for the tuner muzuka memorized channels immediately falls to 1/3 of the maximum. So I need some help in order to solve this problem and even your receiver to make it all OK!
currentflow, means if: to return L101 at about 7V to TP1 and TP2 (as before, when he worked mono) and with a trimme R201 to adjust the stereo (see post 11)
Thanks in advance!
Last edited:
If it needs 7V between TP1 and TP2 to work, there is something else not right. The service manual states that there must be 0V between these test points when L101 is correctly aligned.
Here are some thoughts:
Does the display always show the correct FM frequency in MHz? This will give a degree of confidence that the FM tuner PLL is working.
Is C110 (1uF/50V) faulty? It connects to IC Q103 pin 9.
Have you compared the voltages on all IC Q103 pins with those on the schematic?
The mute circuit(s) may be operating incorrectly when the tuner is selected. Measure the voltage on Q207 base when the 1/3 volume is experienced. If it is not 0V, the mute circuit is operating when it shouldn't.
Many thanks for your cooperation M-r currentflow!
Pity that I do not know English as my native tongue, then we would immediately solve the problem !!
cheers!
Last edited:
Perhaps there are just too many inconsistencies in using the online translator. Well I wish you good luck!
M-r currentflow to clear it up!
Your references with L101 set in mono-mode with a trimmer R201 try to find a stereo but I could!
Otherwise, when you set up with R201 in mono then music and speech with the volume max is OK! When the L101 adjust the stereo, the music and speech drops to 30% when potentiometer for volume is max.
L102 is NF IF 4061 / 75C, as he told me suspicious to him to find a replacement by European standards?
thanks!
Best regards!
Your references with L101 set in mono-mode with a trimmer R201 try to find a stereo but I could!
Otherwise, when you set up with R201 in mono then music and speech with the volume max is OK! When the L101 adjust the stereo, the music and speech drops to 30% when potentiometer for volume is max.
L102 is NF IF 4061 / 75C, as he told me suspicious to him to find a replacement by European standards?
thanks!
Best regards!
When the L101 adjust the stereo, volume for music or speech fall to about 30% when potencijometar the volume is at max., But when I set L101 with mono, stereo and in doing so does not work, great to hear music and speech when Pot. the volume is at maximum!
Do NOT set L101 for the best stereo. Set it as I have stated many times previously - to give 0V across the test points, you get good mono reception (at 100%), but no stereo. Then, I suggest you note the position of L102 before beginning. Adjust L102 for best stereo signal (if you suspect that this has become misaligned) and then adjust R201 as in post #11. Once R201 has been set correctly, it should not need further adjustment. Then go back to L102 and adjust for the best stereo reception and lowest distortion. Finally re-check L101 gives 0V. Tell me if this works. If not, please re-read post #43.
Last edited:
Currentflow, you may have to set your instructions out in short point form rather than in descriptive sentences. It seems Tony 44 skips what he doesn't understand and just attempts the next or previous readable step instead.
You're a brave man though, teaching alignment by forum posts 😉
You're a brave man though, teaching alignment by forum posts 😉
Thanks Ian, but I've tried long-form, short-form even some native language translation! Unfortunately, some of the fundamental procedures have been skipped, which doesn't help. I'm only suggesting alignment of L102 as a last resort as the service manual calls for a distortion analyser. What is there to lose? 😉
I have problems with L102 shattered his ferrite so that it can not adjust. His mark is NF LF 4061 / 75C, I do not know which is the European label?
Best Regards!
Best Regards!
That is the likely cause of your problem.
Can you find a similar ferrite slug from an old receiver?
The types shown in the service manual are:
L101 = NFIF-4060
L102 = NFIF-4061
I don't know who the manufacturer is.
From the LA1266 (Q103) datasheet, the L101/102 coil specification would be similar to:
Attachments
- Status
- Not open for further replies.