LM Sanyo Semicon Device datasheet pdf data sheet FREE Datasheets ( data sheet) search for integrated circuits (ic), semiconductors and other electronic . LM min typ nax unit. *. mA. mA. mA. MA. mA. *. * Electrical Characteristics at Ta= 25°C,Vss=0V,VOD=-9 to – 15V. Output ‘H’ Level Current. ALARM. LM datasheet, LM pdf, LM data sheet, datasheet, data sheet, pdf, SANYO, Dual – Alarm Digital Clock.
|Country:||Antigua & Barbuda|
|Published (Last):||3 May 2014|
|PDF File Size:||16.52 Mb|
|ePub File Size:||18.63 Mb|
|Price:||Free* [*Free Regsitration Required]|
Forums New posts Search forums. Media New media New comments Search media. Articles Top Articles Search resources. Welcome to our site!
Missing Eatasheet on a Clock Radio. Datasheett starter Bender Start date Lm8336 26, Bender New Member May 26, Hi All Apart from doing some basic electrical work back in high school 13 years ago it would be safe to say that I have lost some skills and require some assistance.
I purchased a clock radio from the US I live in Australia.
LM datasheet & applicatoin notes – Datasheet Archive
I then purchased a step down converter so it would work and it does just fine however the time is out by 10 seconds. The manual of the radio states that it should be running at V 60Hz. When I tested the Hz going through the clock radio with a multimeter is only comes up with 50Hz Dahasheet C on the below image.
On the back of the clock radio there is a place where it looks like a switch should be to allow me to change between 50 and 60 Hz.
Upon opening the baby up and taking a quick look around it would appear that there is something missing on the PCB board that should link point A and Point B to convert the 50Hz to 60Hz. The switch on the side adjusts the clock radios brightness and also set the dataseet.
Would anyone have any idea what is missing? Or tell me what I need to buy to make it run at 60Hz? It would be great if I could put it to dataxheet use. It would be nice to see the other side of that little board. However, what is missing is most likely a slide switch that would have pin “b” as a common point.
B is connected to many other points. If your notations are correct. Sadly, you may be out of luck. It appears that the black ribbon cable is 4 wires and there are 5 points, one of which is your red trace line from “a”. The red line is obscuring the solder points. Pad “c” seems to go nowhere. So in 50 Hz land common “B” gets connected to “c” which is what you have now without the missing part.
So it should work down under without the missing part. That’s why I’m wondering if your notations datashewt correct. In 60 Hz land “b” gets connected to “a” which would go out on the ribbon cable to somewhere an adapt the counters to accommodate eatasheet change in frequency which they use to set the time base. I suspect that there may be more missing than one might think if the distributors knew that the clock would daatsheet be sold in a area of 60 Hz.
Or that little board and case were used ’cause they had a bazillion of them and the availability of different Hz is not possible, only 60 Hz. For instance all of north america is 60 but south america has both 50 and 60 Hz dependent on country and most of the rest of the world is 50hz. Of coarse, there is japan which is 50hz in the west and 60hz in the east.
Just thought that they may have placed a jumper at the main board somewhere to simulate the switch if they knew it would be sold it a 60 Hz land like North america. I cannot remember the IC id most of those old clock radio’s used. IIRC, there was 2 version’s of the chip. Hero Banned May 28, Bender, You’ve got that the wrong way round. Have you checked the continuity between pins A and B?
The chances are, there’s a jumber or something on the other side of the board, you need to disconnect from A it and reconnect it to C. Bender New Member May 28, Thanks for all the information you have provided with regards to my issue.
LM (Sanyo) – Dual – Alarm Digital Clock
dataasheet Here is the back of the PCB, sorry for the low res image, I took it from my mobile phone. Hero Banned May 29, You might not need to disconnect anything, try linking pins B and C and it might work. I wouldn’t dayasheet about it smoking. What clock IC does it use? As these seem to be the most common ICs it woudn’t surprise me if the clock uses eithe one or the other. Bender New Member May 29, I found 2 chips one on the radio and the other just behind the display of the clock. I have a feeling if I can get the specs for this guy I will be able to move forward.
(PDF) LM8363 Datasheet download
Mikebits Dqtasheet Member May 29, I think the TMS part looks similar as the chip that Hero identified. I found a datasheet for a TMS May just be crazy enough to try, I did not check the pincount though. I went ahead and checked the pinout. The has 28 pins. Is it possible you miscounted the pins? Anyways, in case you have trouble getting to the data sheet. Here is the pinouts. Yep I did miss count, I hadn’t had my morning coffee yet I’m assuming now all I need now is short the power to pin 25 or 26 and test it out.
LM8363 Datasheet PDF
I got a soldering iron coming on Monday so I fatasheet post back and let you know how I go. I think you should leave pin 25 alone. Also, for 50Hz, I think you want to tie pin 26 to ground Vssnot power pin. The data sheet seems to have an error when it says 60Hz pin left open is pulled down to Vdd. I think it should say pulled up to Vdd. Thanks for the heads up! Hero Banned May 30, I would suggest that datashet don’t mess around with shorting any of the IC pins, just connect pins B and C on the PCB, which are connected to the relevant pins.