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Repair and Repla cement Procedures ProM aster 25 00 User Manua l 7-37 10. Test the module by running a device-related operation using the module. Replacing the Programming Block on a PLCC Module After a p eriod of tim e,…
Repair and Replacement Procedures
7-36 ProMaster 2500 User Manual
The pin insulation block is symmetrical so no specific polarity
orientation is required; it may be inserted into the programming
block either way.
6. Carefully plug the programming block onto the circuit board using
the block’s alignment pins as guides.
The programming block is symmetrical so no specific polarity
orientation is required; the block may be inserted on the circuit board
either way. The block is seated on the board correctly when rests
against the board on all sides without a gap. If a gap exists, remove
and reseat the block.
7. Turn the module upside down and reinsert the two Phillips screws
on the bottom of the circuit board.
8. Reinsert the spring-loaded module pins in the insulation block.
Note: One end of the module’s gold contact pin is spring-loaded and telescopes
when pressed. Reinsert the module pin into the new insulation block with
the telescoping end up so that end contacts the device lead during
programming.
Most SOIC programming modules ship without some pins in the pin
insulation block at the narrow end of the module board. Start
reinserting pins in the block holes nearest the wide end of the circuit
board and work toward the narrow end. Fill both insulation blocks
with an equal number of module contact pins. Figure 7-27 shows a
device over the pins at the wide end of the board.
9. To ensure that the contact pin is seated correctly, use the pliers to
press down on each pin until it is flush with the module’s top surface.
Do not use any object to push the pin farther down the hole.
Figure 7-27
Pin Insulation Block in the Programming Module
2280-2
PIN INSULATION
BLOCK
PROGRAMMING
BLOCK
CIRCUIT BOARD
FRONT
OF
HANDLER
DEVICE
Repair and Replacement Procedures
ProMaster 2500 User Manual 7-37
10. Test the module by running a device-related operation using the
module.
Replacing the
Programming Block
on a PLCC Module
After a period of time, the protective coating on the programming block
(see Figure 7-28) may wear to the point that you begin to see a higher
number of device-related errors. If you have a second module of the same
pin count, you can confirm that wear is the source of these problems by
programming the same type of device on the second module and
comparing the yields.
CAUTION: To avoid possible damage to the system components, this
procedure should be performed only by a qualified service
technician.
Repair and Replacement Procedures
7-38 ProMaster 2500 User Manual
When you have determined that the block needs to be replaced, follow
the steps listed below. This procedure describes how to completely
disassemble the programming module so you can replace the top of the
programming block (see Figure 7-28).
You need the following items to complete this procedure:
• 1/16-inch hex driver
• 0.050-inch hex driver
• New programming block (top)
CAUTION: Remove all the configuration blocks from the module board
before you replace the programming block. The pins of a
contact set might hook on a block and bend or damage the
contacts.
Figure 7-28
PLCC Programming Module (Exploded View)
PROGRAMMING BLOCK (Top)
1667-1
DEVICE EJECTOR PIN
PROGRAMMING BLOCK (Base)
BLOCK ALIGNMENT PIN (1 of 2)
CONTACT SET
(1 of 4)
GOLD PIN
DEVICE EJECTOR SPRING