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Reporting good news, after a day of searching, the fault was finally found, A 620 ohm resistor on this small circuit board has broken, which is very concealed and difficult to detect. I measured the resistors one by one and found that there is no data for this resistor. Upon closer inspection, it has broken. I am very happy, thank you very much for your guidance. Every time I encounter difficulties, I come to the forum and you have given me enthusiastic guidance. Thank you again. O1CN01yHCZpa2C5…

I replaced the C1003C2 IC, but the fault still exists. The IC chip is normal. The main motor does not rotate, and the rewind motor is normal. I am currently searching for any faults in the motor drive section based on the circuit diagram. O1CN01i5X3jq2C5mv5Q90YC_!!1518423.jpg O1CN01KlQC952C5mv8D0M0L_!!1518423.jpg

Hello teachers, I just received a Saba CD360 with the main motor not running, I checked the circuit diagram but couldn't find any relevant information, especially for these two small circuit boards. May I ask for information on the four wires connecting the motor to the small motherboard? Where can I find them? I used a multimeter to measure the four wires connecting the motor: black 11.7v, two light yellow 11.7v, and orange 11.7v, Blue 0v, red line 11.7v I cannot make a judgment due to the lack…

Hello, Your analysis and guidance are very accurate. Follow your red line and search around W to find the dashboard. In order to quickly find the fault, I went to my friend's house and opened the Saba 292 he was using. I removed the indicator circuit board and took it back to install it. The U1-U8 display buttons were adjusted normally, indicating that the IC751 on my board was faulty and needed to be replaced. At the same time, I compared and measured the voltage on the two circuit boards, furt…

I checked every wire in the preset box and found it to be good and normal. I also removed the resistor arrays DS561 and DS563, and measured each resistance value of DS561 with a multimeter. The third pin was 4.5k, and the other pins were 4.65k up and down. The resistance values of DS563 are all within 4.7k I still haven't found the fault... ... O1CN01fy4d212C5mtn8aJeW_!!1518423.jpg

Hello, Your guidance is very accurate. When I checked IC561/IC564, I found that: The 12th pin of IC561 is connected to the 3rd pin of IC564 and there is no 5V voltage, The 13th pin of IC561 is connected to the 3rd pin of IC564 and there is no 5V voltage, The 14th pin of IC561 is connected to the 3rd pin of IC564 and there is no 5V voltage, The AM button does not work, and pressing the AM button does not respond, I have replaced two IC561 and IC564, but there is still no 5V voltage, indicating th…

Thank you friend: I have adjusted P527 to adjust the voltage at F2 to 42.0v 2. Adjusted to 87.50MHz using P577 3. Adjusted to 108.00 MHz using P572, After adjusting, the frequency display is normal, very good! 4. Regarding the issue of adjusting the preset button fault, I have considered it very difficult. I have come up with a solution to remove the preset button box on my other Saba 201 and install it on 292. The fault still persists, and it is still F2F4F6F8 that does not work. This alternati…

Hello, 1. I replaced C567, but the voltage is still abnormal, 2. For the convenience of replacing the IC, an IC socket has been added and TCA530 has been replaced. The F2 voltage is normal at 42v, E2-27v, and E3-2.5v 3. Is the FM frequency 85.6-108.15MHz，and 85.6 normal? 4. Fault: FM manual tuning is normal, 8 storage stations are abnormal, U2U4U6U8 button is not responding, U1U3U5U7 is normal, Please advise, thank you. O1CN01Tm8ztm2C5mthcLscH_!!1518423.jpg O1CN01TUGBPq2C5mte0QPBJ_!!1518423.jpg …

1. It's a bit messy. Just after turning on the power, the F2 voltage is abnormal again, F2-25v 2. I disconnected the connection from F2 to IC566 (TCA530). As shown in the picture, if I disconnected this connection, the F2 power supply would normally be 42V, and if I connected this connection, it would become 25V, 3. Replaced C415 (3.3 µ F 35V), 4. After disconnecting the connection from F2 to IC566, F2 is 42v. Measure the frequency modulation box 2 and stereo decoder 4, and the power supply is n…

My report: 1. Replaced C726 (220uf, 100uf on the original machine); 2. Dismantle R518 and find that this resistor is broken. Replace it with a new 22R (shown in the circuit diagram as 22K), and the F2 voltage is normal at 42v, 3. Remove the D523 Zener diode, which is also broken and has been replaced. 4. The voltage of E2 and E3 is still abnormal, E2-9.9v, E3-0.9v. This fault needs to be pointed out, 5. The stereo decoder is original and has not been replaced, and the numbering is consistent. O1…

Hello, I have replaced C521/47uf and C527/10uf, but the fault has not been resolved yet. F2 is still 25V. I measured E2-8.6v and E3-0.8v. No matter how the tuning was turned, E2 E3 remained unchanged. I checked D506, C517, T522, and T523 again and found no faults. Where should I check next? O1CN01XNtUZh2C5mtZY2kPn_!!1518423.jpg

My friend gave very accurate guidance and reported the measurement results: F2 is only 25v, where is the problem? D506 59.6v， T522 C26.3v， T522 E(F2)25.8v O1CN01pY5XAj2C5mthTRVr1_!!1518423.jpg O1CN01yCW8p32C5mtSuWnLE_!!1518423.jpg O1CN01BP9clb2C5mtbfvaXZ_!!1518423.jpg O1CN01JoGQi52C5mtd7d9HF_!!1518423.jpg

Thank you very much, friend. Report the results of measuring voltage: E2 8.6V E3 0.8V O1CN01Ck8Nix2C5mtcfFgrN_!!1518423.jpg O1CN01qHvr4q2C5mtfRQk12_!!1518423.jpg

I have encountered a Saba 292 and there is a malfunction that I cannot complete. Please ask my friends for guidance. Thank you. Fault: FM can only be tuned within this range of 79-97.95. Please refer to the picture. I have encountered this fault for the first time and I don't know where to adjust it. Please give me some guidance.

Please help guide me on how to adjust the frequency, thank you.

Hello everyone, I have encountered a Saba 292 that cannot be used. After my efforts, it is now able to receive radio signals normally and the sound is also very good. There is still a malfunction that I cannot complete. Please ask my friends for guidance. Thank you. But my machine screen can only use 79-97.95. Please take a look at the pictures I took, I have encountered this fault for the first time and I don't know where to adjust it. Please give me some guidance. O1CN011RoWOA2C5mtd17DQJ_!!151…

​​I'm too old to operate. I'm sorry. O1CN01ydlNUL2C5mt07SivG_!!1518423.jpg

Hello teachers, My 9241 power board has failed. Please help me: Fault: The LED does not display. Check the power supply of the ge/sw/rt three pins on the No. 15 power board. The yellow ge-21v, black sw0v, and red rt power supply are abnormal, and the numbers are constantly changing...... I have checked all the parts on the No. 15 power supply board and have not found the cause of the fault. Please consult all the teachers on how to solve this problem. O1CN01dgDtBa2C5msp5qYOB_!!1518423.jpg O1CN01…

Dear friends, I have just bought a Saba 9260, which needs comprehensive maintenance if it has a fault. Is there any post about the overall arrangement and maintenance of 9260 in the forum? After power-on, only the light bulb lights up, the LED number does not display, and the buzzing voice is loud. Please point me out, thank you.

Check that R939 and R934 are normal, Replaced C917 capacitor Check X907/C1213, there is a fault. After replacing C1213, the voltage is 0.7v, and the fault is removed, The sound of replacing X908 and X909 (c458A) with BC550C is bad and stuffy. The sound of the original c458A is good. Now everything is back to normal, and the fault is removed. Thanks again for the teacher's advice, so I learned new knowledge. Best wishes to you oldiefan dl2jas !