Kodak Carousel Slide Projector Chattering Buzzing Noise Fix

If you have a Kodak Carousel projector and it is giving a buzzing noise, especially when the slide button is pressed, here is the fix.

It is generally caused by a faulty diode bridge located on the board next to the transformer. 

The faulty bridge can sometimes cause the fuse to blow but this in the extreme case.  Any way, if one of the diodes fails in the bridge rectifier, then there will be a AC component on the DC power rail.  This will mean that the solenoids will buzz, chatter and will be actuating very weakly.

The bridge rectifier in my Carousel was a B125C 1500.  I used a W04 as a substitute.  The secondary rail is about 24v so it is within the 50v rating of the W04.

WindyCityTech Blogger
WindyWindyCityTech WordPress

Downloading files at a fixed slower rate using trickle and wget

Sometimes downloading files causes connections to saturate or hang.

Installing trickle on Linux can help by allowing the user to shape the download / upload speed for any application!

First, install trickle.
sudo apt-get install trickle or compile from source

In this example we are shaping the speed of a wget download to 50kbps.

trickle -d 50 wget http://www.download.com/files/myfile.avi

There is a lot more trickle / trickled can do so check out the man files for it.

WindyCityTech Blogger
WindyWindyCityTech WordPress

FetchTV YX-6936U Main Board Connections

Here are the connectors on the main fetch board.

1    Ethernet
2    HDMI
3    Optical
4    Composite S-Video Component
5    Rear USB
6    Front USB
7    SDA/SDK/ERR/Sync2/Clk2
8    Tuner Data D0-D7
9    Tuner Clock/Sync/Valid/Error
10    Tuner Power + I2C
11    From Power Supply
12    Smartcard Reader
13    Front Panel Light + remote
14    TTL RS232
15    3.3v + unknown
16    Sata

Power + Tuner Power

Tuner Control

Tuner Data + Control Front, USB

Front Panel

WindyCityTech Blogger
WindyWindyCityTech WordPress

FetchTV YX-6936U Boot messages from rs-232 header inside unit

Inside the FetchTV box is a straight 6 pin header, if you look closely at the white writing near it, you will notice the assignments given by the first 4 pins.

The other four pin header has 3.3v and probably other things.

The data needs to be converted from TTL to rs-232 using a max232 chip.  Look on ebay for rs232 translator boards.  In my case the 5 volt rail powered my translator board, I used ground ground one of the tv tuners.

The connection speed is 115200 N,8,1.

As soon as the boot commences, it begins to spit out data.

The full dump is here

Interesting lines from the boot sequence:
Shmoo Version=3.5
BCM97413B1 CFE v2.21.2679, CFE core v2.12, Endian Mode: Little
RSA encryption

So much like the Tivo, Generation 4…..

If anyone want to share their FetchTV dumps, please paste on pastebin.com and put a link in the comments below.

WindyCityTech Blogger
WindyWindyCityTech WordPress