TSOP lock installation instructions
for 2700, 2800 & 3700 type receivers
(AM29F400B or equivalent TSOP)
|Here are step-by-step instructions for the installation
of the digital TSOP lock in your receiver. It is fairly
simple and can be done in about 15-30 minutes depending
on your skills. For best results, take the time to read
this carefully and follow the instructions in the order
in which they are written here without burning any steps.
First, here is a list of tools and supplies you will
Small Phillips screwdriver
15/64 inch high-speed drill bit
Tape measure or ruler
Felt pen marker (Sharpie)
Soldering iron w/fine tip & resin-core 60/40
28 gauge solid wire (wrap wire)
Wire stripping tool, small long nose pliers, small
Digital TSOP lock PCB (Printed Circuit Board) shown
with special pushnut fastener.
The push nut is required to fasten the board to the
back panel on the receiver.
1. Drill hole in the back panel of receiver
the IRD cover. Use a tape measure or ruler to take measurements
and mark the center of the hole to drill with a felt
marker. Drill a 3/16" hole 5 1/2 inches from the right-hand
side of the receiver case and 1 inch from the top of
the receiver case as shown in the picture below.
Turn the receiver upside down and place a small wooden
block behind the metal panel while drilling the hole.
This will produce a cleaner hole (less burrs on the
backside of the hole) and prevent harmful metal chips
from going into the receiver. Make sure you clean off
any remaining metal particles after drilling since those
could cause shorts on the mainboard and seriously
damage your receiver.
The location and size of hole in the receiver used in
the above picture WAS NOT drilled at the size and location
specified in this document. Its hole was drilled a long
time before this digital lock PCB was designed and this
receiver was used only to provide a visual aid. Don't
worry if the hole in your receiver looks different from
the one in the picture: this is perfectly NORMAL.
2. Solder wires to PCB
6 lengths of wrap wire. Make each wire 6 inches long.
Strip about 1/8" insulation off one end of each wire
and solder all the wires to each of the 6 pad/holes
on the front edge of the PCB (DQ1, VCC, GND, DQ4, CPU
WE, TSOP WE). It is recommended to insert the wires
into the bottom side of the board and solder those from
the top side. This is not absolutely required, it just
makes for a cleaner looking result.
Soldering the wires onto the PCB from the top
3. Fasten PCB to receiver back panel
the PCB's switch lever through the hole from the inside
of the receiver.Then screw it tightly in place.
Slide pushnut on
4. Remove R259 from the IRD mainboard
the surface mount resistor labeled R259 on the mainboard
using the picture below as a guide. Remove the resistor
by heating up one side with the tip of your iron. The
heat will quickly transfer to the other side of the
resistor and the solder will melt on both sides. Then
simply swipe it off with a lateral motion of your iron.
Location of R259
R259 footprint after component is removed
Don't clean up the solder blobs off the pads unless
the solder is shorting the pads together: the residual
solder is useful because you will have to solder a wire
to the left-hand side pad of R259 later on.
There are older versions of the Model 2700 (Model 2710)
on which R259 is simply not there. If you have
one of those models, you will have to cut the trace
where R259 would normally be located. Then you must
scrape the green lacquer (solder mask) off the trace
on the left side of the cut and solder the TSOP WE
wire to that trace.
5. Locate the wire solder points on the IRD mainboard
the wire solder points on the mainboard using the picture
below as a guide.
Location of signal solder points
Location of power solder points
6. Solder the wires on the IRD mainboard
for the digital lock circuit to function reliably, it
is essential to keep the wires at minimal length. The
6 inch wires already soldered to the PCB at this point
should have a bit of excess length and can be shortened.
Here's an easy way to trim each wire to its optimal
Grab the first wire between your thumb and index and
gently pull on it. Let the wire slide between your fingers
and place it on the board surface right above the pad
where it's meant to be soldered. Leave about 1/4 inch
excess length and cut the wire using your fingernail
as a marker. Refer to the picture below:
strip about 1/16 inch insulation off the end of the
wire. It's important to strip only a short length of
insulation in case you accidentally nick the wire and
have to cut the wire and strip it again. It's also a
good idea to keep it short because this avoids the wire
from potentially shorting to other pads nearby. Here,
a good quality wire stripping tool (like the one shown
in the picture below) really helps.
Strip 1/16" of insulation off the end of the wires
slightly bend the end of the wire about 1/8" above the
insulation and hold it above the pad/hole with a pair
of fine long nose pliers. With your other hand, heat
the edge of the pad with the tip of your soldering iron
and push the wire straight down into the hole once the
solder melts. Inspect the solder joint with a magnifying
glass to make sure it's good. You can also check the
solder joint by tugging slightly on the wire.
Repeat the operation until all the wires are soldered.
The connection points for GND, VCC and TSOP WE
are surface mount pads. In plain English, this
means that those pads have no holes in them.
For those connections, solder the wire flat on the pad
7. Label the TSOP lock switch
final step is to label the lock switch positions on
the back panel of the receiver. This is essential in
order for the user to be able to tell at a glance whether
his TSOP is locked or not. In the picture below, fancy
Dymo labels were used but you can simply use a felt
pen marker if you want. Just be aware that Sharpie ink
markings will come off with alcohol or other solvents.
Black pen markings are also harder to read when the
receiver is in a dark place (inside a stereo cabinet
for example). Printed labels don't have these shortcomings.
Locked and labeled :-)
all set. When ECM's come down, you will still get the
message "Serious error has occured with your receiver".
But the difference is that your TSOP will NOT have been
zapped. When that happens, simply unplug your receiver
for a few seconds and plug it back in. You will be back
up and running in a few seconds.