UNPLUG THE AC POWER CORD FROM BOX BEFORE PROCEEDING!
READ ALL INSTRUCTIONS A FEW TIMES BEFORE STARTING
Wiring the chip. It will be easier to use a small vice or a C clamp to hold the
socket while soldering. There is an 8 pin chip and an 8 pin socket. There is a
notch in the short side of the chip and a notch in the short side of the socket.
When installing the chip in the socket make sure the notches line up! You will
need 4 - 6 pieces of wire ( aprx 26 guage) 6 - 7 inches long. You will solder
the wires to the pins on the socket and then install the chip into the socket.
This will prevent any damage to the chip from possible overheating during
soldering. If you look at the “diagram A” below you will see where each wire
will be soldered to which pin number of the socket. Once the wires are soldered
to the appropriate pin numbers they will then be referred to as either the wire
number or the pin number of the pin on the socket they are soldered to. In
“diagram A ” you are looking DOWN at the chip installed in the socket with
the wires soldered to the socket. It is important to remember this because you
will probably be turning the socket upside down to solder the wires to it and
you could get confused about the pin numbers!! In “diagram B” the socket is
shown upside down ready to solder wires to. Again, make sure you are paying
attention to the notch . Initially you will solder wire leads to pins 1, 6, 7
and 8. I would recommend also 4 and five but you should read about that below
under “Chip Options 1”.
1 . Remove the 4 screws on the bottom of box. A Linehead # 3 driver bit is used
for this or a pair of wire cutters. 2.Locate the diag. that best resembles your
box. Model # is printed on bottom of your box.
3 . With cft 22** DO NOT CUT BATTERY. All other boxes find battery as shown in
diag. And cut positive terminal with wire cutters. Entire battery can be removed
if desired. Insulate with tape any loose ends.
4 . Connect wires from # 1 and # 8 of Test Module to converter. Find the 28 pin
IC socket as shown in diag. from step # 2. On some models there is an IC (chip)
plugged into this socket (do not remove this ). Solder wire #1 to pin # 28. See
IC diag. to locate pins. On some boxes without the IC there will be an outline
on the board in that spot and you will find jumpers at the hole where pin #28
should be (this would also be true for pin #14 and wire #3). Jumper- short
silver wire that looks like a staple. Solder wire # 8 to pin # 14. If all else
fails, know that wire # 1 needs to go to any jumper or terminal that has +5vDC
and wire #8 needs to go to any ground on the box. This can be tested with a volt
meter with box plugged in. Then unplug the box.
5 . Connect wires # 6 and # 7. First find the position of the jumper for wire #7
as shown in diag. in step #2. Next find the jumper # from choices in diag. Cut
the jumper in half and solder wire #7 to the half shown in diag.. Wire # 6 is
then soldered to the other half of the cut jumper that wire #7 was soldered to.
Some boxes, instead of a jumper to cut, will have a pin from a chip to cut (cut
pin in half) and.Diag.will show where #7 wire goes. Wire #6 is soldered to the
other half of that cut pin.
6. Insulate and secure Test Module ( clear packing tape works well, or double
sided foam tape ) so as not to short anything.
7. All non R2, V5, or CFT model numbers. Using all 4 wires on Test Module. Cut
pin # 19, of 64 pin chip in half. Solder wire # 7 to pin half that is toward the
chip. Solder wire # 6 to the other side of the cut pin ( the pin half still
attached to main board). Solder wire #1 to pin 28 of the 28 pin chip and wire #8
to pin 14 of the 28 pin chip.
8 . R2S8, R2M1 (see diag.) It will be necessary to unsolder or cut several wires
which connect the tuner to the main board. Solder wire # 6 to other half of cut
pin 18 (chip side). Reconnect and solder wires back on tuner.
9. CFT22xx- Find 32 pin chip and solder wire #1 to pin #32 (+5v DC) and wire #8
(ground) to small metal box. ( see diag.).
Cut the fine trace that connects 2 holes in the master board (under letters
U301, see diag.) with exacto knife. It is helpful to scrape away some of the
solder mask near the holes and maybe solder pieces of 30AWG wire wrap wire to
the holes and then solder those to the Modules wires. Solder wire #7 to the feed
hole to the right of the trace and #6 to the left. CFT2254- A first time
initialization must be performed using a serial entry device (“stick”or rft)
prior to use (only once). This can be done before the chip is installed.
10 . Operation- Plug box in outlet. L.E.D display should show # 2 within 1
minute. If not, unplug, check your connections and try again. If still
unsuccessful leave plugged in for 40-120 minutes, unplug 15 seconds and repeat
plugging in. After # 2 displays, unplug 15 seconds and try again, it should only
take 6 seconds to activate and from that point on it will always take 6 seconds.
Check to see that box can display all channels up to 99 on the L.E.D.. Connect
input cable to input on box. Connect TV or VCR cable to output on box. Select
channel 3 on TV or VCR. If TV has AFC (or AFT) control switch off.
11 . If your box is not listed or if the jumpers shown are not correct for your
box, then you will need to find the correct jumper. First, you will need to find
a 24pin chip normally labeled LA7770. It will be located on the bottom of the
circuit board in the box. If it is not marked, it will be the only 24-pin chip
on the bottom. Place one lead of a volt/ohm meter on pin #21 of this chip. With
the other lead, touch each jumper on top one at a time until you get a near zero
ohm reading. Connect wire # 7 to the side of this jumper that points to the
large square chip on the bottom of the circuit board in the box. Then cut the
jumper in the center.
12. If your box has a tamper switch as in diag. #4: Hold switch in the down
position and use soldering iron to melt plastic to keep switch permanently in
down position.
Chip Information:
The chip will be fully functional in over 99% of areas.. When you switch on your
box you will initially find that your channels numbers are different from
normal, whilst the chip is adapting to your system. You will also find that if
you have any multimode channels they will initially be scrambled. Depending upon
the time of day, and your local cable operator, your box will have full
operation with all channels open within 10 minutes to 3 hours (but 20 minutes is
a typical waiting time). If you wish, you can press the A/B button on your
keypad or remote control to switch between channel maps until it finally
adjusts.
If you have any problems, using the options below will normally solve them.
chip Pin-Outs:
Pin 1 Live(+5v) Pin 8 Ground
Pin 2. Optionally ground to disable Pin 7 data output
Automapping on power up
Pin 3 Optionally ground to disable Pin 6 data input
Address tracking
Pin 4 for normally closed switch Pin 5 Virtual ground (used only for normally
closed switch)
Chip Options:
1.If pins 4 and 5 are connected to a NORMALLY CLOSED switch (available at radio
shack) the chip will not reboot the box when power is applied. The switch must
be depressed while power is applied to the box to reboot it. This allows you to
unplug the box without losing the channel map every time. If no switch is fitted
when the box is turned on, it will usually take about 20 minutes for the normal
channel map to be reloaded (depending upon the area and the time of day).
Depressing the switch momentarily when the box is on will force the chip to
update the channel map with the next available map on the cable system.
Installing the normally closed switch also fixes the problem if you are loosing
pay channels after a while.
Basically if you are having any problems the first thing to try is the normally
closed switch.
2. If pin 3 is grounded this will DISABLE the address tracking system which
continuously scans for updated channel maps. Leave this pin empty unless the box
constantly "JUMPS" between channel maps on a multiple map system.
3.If pin 2 is grounded this will lock the current channel map in place and
prevent it being updated. It will disable the automap on power up - a function
which causes the chip to search for the first available channel map every time
the box is powered up. You must leave this pin empty for the chip to initially
automap your box, and then remove it can be grounded to lock it in place.
4. If both pins 2 and 3 are grounded all automapping systems will be disabled,
and the chip will function as a normal 4 wire auto multimode chip. Which means
that all the channels will still come in but you might have some channel numbers
that are different from what the cable co assigns. Ex. Normally HBO is ch 55 but
now it is ch 62.
Assembling the chip.
Use a small vice or c- clamp, as you will need both hands free.
Carefully inspect your work for defects before fitting the chip in the socket.
Solder the live wire to pin 1
Solder a ground wire to pin 8
Solder a data out wire to pin 7
Solder a data in wire to pin 6
Optionally solder a normally closed switch to pins 4 and 5
Insulate the chip and socket using sticky tabs, or something similar, and
connect the wires using the correct diagram for your cable box.
NOTE: When the chip is fitted WITHOUT a normally closed switch, if power is
turned off to the cable box, it will lose the channel mapping. It will take an
average of 15 minutes after power up, for all functions to be r
Click on a Diagram that matches your Converter Below
Diag#1 DPBB7312/V5, DPBB7522/V5
Diag#3 DPV7212P/R2, DPV7113P/R2
Diag#7 All converters that do Not have R2, V5 or CFT in the Model Number.
Look at the above Diagram. If your Boxes main board looks like Diagram #7, then this chip will NOT work.
Diag#8 CFT22XX Version 1 (Older Boxes)
