MJLJ V4 kit assembly guide: Difference between revisions
(+parts table) |
(more items for table) |
||
Line 51: | Line 51: | ||
|- bgcolor=grey | |- bgcolor=grey | ||
!Part!!Type!!Value!!Photo | !Part!!Type!!Value!!Photo | ||
|- | |||
| ||PC Board|| MJLJ V4 PC Board||[[Image:MJLJ_V4_board.jpg|64px]] | |||
|- | |||
| ||Enclosure||MJLJ V4 Enclosure||[[Image:MJLJ_V4_enclosure.jpg|64px]] | |||
|- | |- | ||
|R1,R7||Resistor||100 ohms||[[Image:1206_chip_resistor.jpg|32px]] | |R1,R7||Resistor||100 ohms||[[Image:1206_chip_resistor.jpg|32px]] | ||
Line 92: | Line 96: | ||
|X1||Connector||RJ-11 jack||[[Image:RJ11_jack.jpg|32px]] | |X1||Connector||RJ-11 jack||[[Image:RJ11_jack.jpg|32px]] | ||
|- | |- | ||
|X2||Connector||Molex Right angle, 16 position||[[Image: | |X2||Connector||Molex Right angle, 16 position||[[Image:molex_minifit_16_right_angle_pcb.jpg|64px]] | ||
|- | |||
| ||Connector||Molex Plug, 16 position||[[Image:molex_minifit_16_plug.jpg|64px]] | |||
|- | |- | ||
| ||Pins||Molex Pins (16)||[[Image:molex_pins.jpg|32px]] | |||
|} | |} | ||
Line 126: | Line 133: | ||
|- | |- | ||
|PS1||Sensor||MPX4250ap||[[Image:MPX4250ap.jpg|32px]] | |PS1||Sensor||MPX4250ap||[[Image:MPX4250ap.jpg|32px]] | ||
|- | |||
| ||Fastener||Zip Tie||[[Image:Zip-Tie.jpg|32px]] | |||
|} | |} | ||
</center> | </center> |
Revision as of 04:22, 11 June 2008
Precautions
Surface mount Components
The soldering portion of this kit was NOT designed for beginners! The Megajolt Lite Jr. makes extensive use of surface mount components. Hand-soldering SMT components requires advanced soldering skills and a steady hand. Individual parts are tiny, and are therefore easy to overheat and damage.
If you are not comfortable assembling this kit after reviewing the instructions, we recommend you purchase a ready-made and tested unit from our online store, offered at a reasonable price.
Before you Begin
Familiarize
Read the instructions completely before soldering your first component.
Do not lose parts
- Leave the parts in their bags and protective tape: Remove them just before soldering.
- Tiny flying parts: Be careful when extracting the parts from the tape- they can go flying if the protective tape is removed too quickly. Also, ensure you have a good grip on the part with your tweezers- a missed tweezer grab can send the part flying.
- Work surfaces and floor: Work in a clean and open area, preferably with hard floors: if a part falls off the bench or flies away from a missed tweezer grab, it will be easier to find.
Lighting
Use lots of good lighting- best is to use bright overhead lights combined with an illuminated magnifying glass.
Note part orientation
Some components, such as diodes and capacitors are marked with a band indicating their orientation. The markings on these components can be faint- especially with the diodes. Be sure to positively identify the component orientation before soldering- good lighting will help this tremendously.
Do not overheat
Small parts are easy to damage- use minimal heat required for soldering components. It is essential a recommended low wattage, fine-tipped soldering iron be used for assembly.
Assembling the kit
Tools you will need
Below are the essential tools you'll need for this project:
- A fine-tipped, low wattage soldering iron is necessary for precision work.
- Probably the best tool - a cross-action set of tweezers. This tool is normally closed, allowing you to hold parts with a relaxed grip and reduced tremors.
- Solder wick. Too much solder and you'll create ugly blobs and solder spikes. use this to clean up your joints by drawing away excess solder.
- A magnifying glass, preferably illuminated, is useful for identifying package markings and inspecting solder joints.
Parts Inventory
Part | Type | Value | Photo |
---|---|---|---|
PC Board | MJLJ V4 PC Board | ||
Enclosure | MJLJ V4 Enclosure | File:MJLJ V4 enclosure.jpg | |
R1,R7 | Resistor | 100 ohms | |
R2,R8 | Resistor | 1K | |
R5,R6 | Resistor | 2.2K | |
R9 | Resistor | 680 ohm | |
D6,D7 | Schottky Diode | ||
C3,C4,C5,C6,C7,C10 | Capacitor | 0.1uF | |
C15 | Capacitor | 0.001uF | |
C16 | Capacitor | 0.22uF | |
C1 | Capacitor | 33uF 20v electrolytic | |
C2 | Capacitor | 33uF 35v tantalum | |
D1,D2,D3 | Diode | 1A 400v rectifier | |
D4 | Diode | 12V Zener | |
LED1 | LED | Right angle LED, green | |
U1 | Integrated Circuit | MJLJ V4 Processor Freescale MC908QB8 | File:MC908QB8.jpg |
IC1 | Integrated Circuit | ULN2003 Transistor Array | File:ULN2003.jpg |
U2 | Integrated Circuit | MAX232A Transceiver (or equivalent) | File:MAX232a.jpg |
U3 | Integrated Circuit | LM2937-5.0 voltage Regulator | |
QG1 | Oscillator | 16MHz oscillator | |
IC1,U1 | Sockets | 16 Pin DIP Socket | File:PDIP-16 socket.jpg |
X1 | Connector | RJ-11 jack | File:RJ11 jack.jpg |
X2 | Connector | Molex Right angle, 16 position | |
Connector | Molex Plug, 16 position | ||
Pins | Molex Pins (16) |
Part | Type | Value | Photo |
---|---|---|---|
R3 | Resistor | 1K | |
C11 | Capacitor | 0.1uF | |
C12 | Capacitor | 0.001uF | |
C13 | Capacitor | 0.22uF | |
C14 | Capacitor | 15uf | |
D5 | Diode | Schottky Diode | |
L1 | Inductor | 1uH |
Part | Type | Value | Photo |
---|---|---|---|
R4 | Resistor | 270 ohm | |
C8,C9 | Capacitor | 0.1uF | |
PS1 | Sensor | MPX4250ap | File:MPX4250ap.jpg |
Fastener | Zip Tie |