Group 20 CPR
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Contents |
Critical Project Review
- The purpose of the Critical Project Review is to provide a final review of the printer and its components before submission of the project, as well as provide a step by step guide for reassembling the HP Printer. The Product Reassembly Plan details how the printer was put back together, while the Reassembly Reflection discusses the differences between the disassembly and reassembly, how well the product works after reassembly, as well as any additional suggestions that the group may have regarding the printer.
Product Reassembly Plan
- The reassembly of our printer took approximately two and a half hours over two separate days. Day one occurred on November 9, 2009, and encompassed steps one through fourteen. Day two occurred on November 16, 2009, and encompassed the remaining steps fifteen through thirty eight. Total time spent on each day was one hour on day one and one and a half hours on day two. Each step required to reassemble the printer is detailed below in Table 7: Reassembly Procedure. The difficulty of each step was measured using the following table, Table 6: Reassembly Difficulty Levels.
| Difficulty Level | Description of Level |
|---|---|
| 1 | *Minimal effort needed to complete step, only one attempt necessary. * A person with no knowledge of product could complete step |
| 2 | *Some effort required to complete step, possibly more than one attempt necessary if unfamiliar with product. *A person with little or no knowledge of product could complete step |
| 3 | *Active effort required to complete step, as step may need to be thought through to be performed correctly. *Possibly more than one attempt necessary to complete step if step is not thought through properly or timing of step is incorrect. *Pieces may be hard to replace properly as they were not intended to be put back together easily. *A person with little knowledge of product could complete step. |
| 4 | *Quite a bit of effort required to complete step, as step requires some thinking and strength to be performed correctly. *Possibly more than one attempt necessary to complete step if step is not thought through properly, timing of step is incorrect, or strength required to complete step is not used on the first attempt. *Pieces may be hard to replace properly as they were not intended to be put back together easily. * A person with some knowledge of product could complete step. |
| 5 | *Maximum effort required to complete step, as step requires thinking, timing, and strength to be performed correctly. *Possibly more than one attempt necessary to complete step if step is not thought through properly, timing of step is incorrect, or strength required to complete step is not used on the first attempt. *Pieces are difficult to replace properly as they were not intended to be out back together easily. * A person with some knowledge of product could complete step. |
| Step # | Process | Tools Used | Difficulty | Picture |
|---|---|---|---|---|
| 1 | *Put small silver clip back in on the bottom of the frame. | None | 1 |  |
| 2 | *Insert paper lifter into clips and through the left side of the frame. | None | 1 |  |
| 3 | *The Black Plastic Cover must be popped back in by sticking it in the two slots in bottom of printer, and popping in the back clips. | None | 1 |  |
| 4 | *Put matching blue and white gears back in on the left side of the printer. | None | 1 |  |
| 5 | *Slide the Rollers (2) into slots on both sides of the frame. | None | 2 |  |
| 6 | *The rollers must mesh with the gears that have already been inserted, and the medium spring must be placed over the white peg before it is snapped into its slot. | None | 3 |  |
| 7 | *Black clip must be fitted into the rollers while the white external clip with the spring must be connected to the blue gear. | None | 3 |  |
| 8 | *Snap the gray wing holders back into place on each side. | None | 1 |  |
| 9 | *Put the Wings and their small springs back into place on each side. | None | 2 |  |
| 10 | *Place the Small Metal Blocks back into the slots on either side | None | 1 |  |
| 11 | *The Rollers (1) must now be inserted into a slot on one side and popped into the slot on the other in the back of the printer. | None | 2 |  |
| 12 | *Put Roller Cover (2) back onto the printer. | None | 1 |  |
| 13 | *Put Roller Cover (1) back onto the printer | None | 1 |  |
| 14 | *Put large Spring back into printer. (See picture for connections) | None | 2 |  |
| 15 | Reassemble Spittoon *Place long gear back into Spittoon, followed by the Print Head Cleaner. *Replace two small gears on outside of Spittoon, followed by Spittoon motor, which is attached using a pink Torx 10 Screw. *Snap Spittoon Cover back into place. |
Torx 10 Screwdriver | 2 |  |
| 16 | *Pop Spittoon back into place and secure with two pink Torx 10 Screws. | Torx 10 Screwdriver | 3 |  |
| 17 | Reassemble Print Head Assembly *Replace print head assembly circuit board, and secure it with the three casing pieces using 6 pink Torx 10 Screws. *Slide the Ink Carriage back onto the large silver bar, and reconnect this back onto the print head assembly frame. *Reconnect the transparent band. *Reinsert the ink cartridges. |
Torx 10 Screwdriver | 3 |  |
| 18 | *Reconnect the Print Head Assembly to the printer using the two long screws. | Torx 10 Screwdriver | 1 |  |
| 19 | *Slide in main circuit board behind the print head assembly frame, and use two flat 3/16" Torx 10 Screws to secure the board. | Torx 10 Screwdriver | 1 |  |
| 20 | *Reconnect the Ribbon Cable to both the circuit board and the print head assembly. | None | 2 |  |
| 21 | *Reattach the black plastic clip to the small circuit board using 1 Torx 8 Screw and carefully insert it into the front left of the printer. *The metal plate also needs to be reinserted into the left side of the printer. |
Torx 8 Screwdriver | 2 |  |
| 22 | *Reattach the small motor to the plate using two Torx 8 Screws. | Torx 8 Screwdriver | 2 |  |
| 23 | *Reconnect the green and yellow wires to the small circuit board, and reconnect the blue and white wires to the small motor. | None | 1 |  |
| 24 | *Insert the large motor into the print head assembly frame, and attach it using two flat topped Torx 10 screws. | Torx 10 Screwdriver | 1 |  |
| 25 | *Stretch the print head belt over the large motor. | None | 4 | |
| 26 | *Thread the remaining wires through the hole in the frame, then reattach the breadboard to the main circuit board. | None | 2 |  |
| 27 | *Put the power box back into the printer and attach it using two 1/2" Torx 10 Screws. *The power box must be lifted over the pegs prior to being screwed into place. *Reattach the red and green wires to the circuit board in the power box. |
Torx 10 Screwdriver | 2 |  |
| 28 | *Reconnect the green wires to the small green circuit board and screw it in near the power box using a flat topped Torx 10 screw. | Torx 10 Screwdriver | 2 |  |
| 29 | *Press wires into clip that holds them in place near power box. | None | 1 |  |
| 30 | *Push blue and black wires back through hole in front right of printer, then pop in small cover. | None | 2 |  |
| 31 | *Reattach gray wires to Spittoon motor. | None | 1 |  |
| 32 | *Slide in the paper tray and the paper guide. | None | 1 |  |
| 33 | *Replace silver bar on top of the print head assembly frame using two 1/8" Torx 10 Screws. | Torx 10 Screwdriver | 1 |  |
| 34 | *Snap white wires into LEDs, and insert the LED panel into the printer housing. | None | 1 |  |
| 35 | *Press housing down onto the printer until all four clips snap into place. | None | 2 |  |
| 36 | *Use two 1/2" long Torx 10 Screws to attach the housing to the printer. | Torx 10 Screwdriver | 1 |  |
| 37 | *Reinsert back panel into the printer and turn the knob, locking it in place. | None | 1 |  |
| 38 | *The HP Deskjet 960c is now reassembled. | None | 1 |  |
Reassembly Reflection
Differences Between Disassembly and Reassembly Processes
- The majority of the printer was reassembled using the reverse steps from the disassembly procedure. The only differences occurred when parts on opposite sides of the printer from each other were reassembled in a different order than what had occurred during disassembly. However, this did not affect the overall reassembly of the printer, because as long as an entire layer of components were replaced before the next layer of components, the printer would still be rather straightforward to reassemble. Additionally, the entire Spittoon was put back together before being reinserted into the printer, where as during disassembly, the cover, print head cleaner, and internal gear were taken out before the Spittoon itself was removed from the printer. Besides these minor differences, the disassembly and reassembly processes of the printer occurred in the reverse order of each other.
- Just as the reassembly and disassembly processes were similar, so were the tools necessary for both procedures. During disassembly, Torx 8 and Torx 10 Screwdrivers, a Flat Head Screwdriver (used as a pry tool), and hands were the only tools needed to complete the procedure. The same was true for the reassembly, as the exact same tools were necessary, and no additional tools were required.
- By using detailed notes and pictures as a guide, the entire printer was able to be reassembled in the same way that the printer was prior to disassembly.
Product Functionality After Reassembly
- Before disassembly, the printer was tested to see how well it functioned. After the initial assessment, the printer was able to power on, with multiple functions occurring. First, the LEDs on the button panel lit up, signifying that the printer was indeed on. Second, the motors could be heard rotating inside the printer every time the printer was turned on. Third, when the cover was opened on the printer, the Print Head Assembly started to function, bringing the Ink Carriage into view for the user. Closing the cover returned the carriage back to its initial position. After reassembly, the printer was tested and was found to work in the same way that it did prior to disassembly. Unfortunately, without a USB cable to hook the printer up to a computer, it is unknown whether or not the printer could actually print a document if prompted to.
Final Thoughts About Printer
- After completing the reassembly of the printer and testing its functionality, no additional revisions are believed to be necessary to the printer. Overall, the HP Deskjet 960c Printer is very well put together and performs its tasks extremely well. Naturally, new technology eventually led to better printers being produced, with increased capabilities and increased functionality. However, prior to its discontinuation, the HP Deskjet 960c Printer was a very respectable model in the home printing market, as its functions, seen with each print out, met the demands of consumers of the time.
