Tucson T-238 Скачать руководство пользователя страница 6

 

T-238 Assembly Manual 

Rev. 1 February 2001 

Page 6 of 11 

[  ] U2 7805 
 
[  ] Solder and clip the leads (3 total) 
 

LCD Module

 

Now you will prepare the LCD module for connection to the 
T-238 PCB.  The LCD connects to the PCB via a flat 
ribbon cable. 
 
[  ] Carefully remove the LCD module from its protective 
packaging. 
 
You will be soldering a 1x16-pin male header to the LCD.  
During this time you need to protect the LCD screen from 
splatter while soldering. 
 
[  ] Cover the LCD screen while soldering. 
 
[  ] A 1x17-pin male header is supplied in the kit.  Carefully 
trim 1 pin off one end of the header to make a 1x16-pin 
header. 
 
[  ] Position the 1x16-pin male header to the rear of the 
LCD in the holes on the top of the display.  These are the 
holes labeled with a 1 on one end and a 16 on the other. 
 
[  ] Solder the 1x16-pin male header with pins facing to the 
rear of the LCD module and in holes 1 through 16.   
 

NOTE  –

J8 on the PCB is an alternate connection for 

powering the LED backlight on the LCD.  There will be a 
red and black wire, a polarized Molex plug housing, and 
two pins remaining.  These are for LCD displays that  do 
not have a 16-pin header but rather a 14-pin header.  Pins 
15 and 16 supply power to the LED backlight.  The LCD 
display supplied with your kit has a 16-pin header.  You 
may save these parts for any future modification on your T-
238. 
 
That completes the assembly of the LCD module cables.  
Set them aside for now.  The LCD module will be 
connected to the PCB after a few voltage  checks are 
completed in the next section. 
 

Almost done 

At this point, these should be the only items left  
 

NOTE:

 Keep U3 and U4 in the antistatic foam 

 
[  ] U3 MC68HC908GP32  
[  ] U4 MAX23 
 
[  ] 2.1 mm Coaxial Plug  
 
You are almost finished assembling the PCB.  Next you will 
do some final checks before applying power. 
 

Содержание T-238

Страница 1: ...tended for use with the Dallas Semiconductor 1 Wire bus and any device that needs a serial connection Four push button switches and a Liquid Crystal Display LCD provide the user interface The initial application for the T 238 is a controller that accepts data from a Dallas Semiconductor weather sensor unit processes it and formats it for sending either directly to a Terminal Node Controller TNC fo...

Страница 2: ...tor 1 2 w 5 Carbon Film 1 4 7 Ω yellow violet gold R13 Resistor Trimpot 1 10K Ω Trimpot 103 V1 Capacitors Capacitors may be marked in various ways The typical markings are listed but may vary Find all that match and the remaining ones if any should become apparent by elimination Mylar or Monolithic 5 0 1 uf 104 C3 C7 Electrolytic or Tantalum 5 1uF 105 or 1 35 C8 C12 2 10 uf C1 C2 Diodes 2 1N4148 S...

Страница 3: ...ayout diagram for clarification of parts placement All references to up down left and right assume that you are looking at the PCB with the text right side up that is the four switches are at the bottom and the five big connectors are at the top Resistors Resistors have a lead spacing of 0 4 and should lie flat on the PC board You may wish to use a lead former to pre form the resistor leads for ne...

Страница 4: ...oldered connections or cold gray and or grainy looking solder connections OK so far This completes the IC socket installation Capacitors All capacitors should be mounted as nearly flush to the board surface as practical without stressing the leads Install the following capacitors C3 0 1 uF 104 C4 0 1 uF 104 C5 0 1 uF 104 C6 0 1 uF 104 C7 0 1 uF 104 Solder and clip the leads 10 total Electrolytic a...

Страница 5: ...arked on the PCB with a square pad Pin 1 on the crystal oscillator is marked with a black dot and or an edge of the can that is square instead of rounded CAUTION Make certain that the U1 metal housing does not short to nearby R10 or R12 U1 32 000 MHz U2 9 8304 MHz Solder and clip the leads 8 total Connectors Gently rock the RJ 11 connector until it snaps into place and solder the leads J2 RJ 11 co...

Страница 6: ...x16 pin male header with pins facing to the rear of the LCD module and in holes 1 through 16 NOTE J8 on the PCB is an alternate connection for powering the LED backlight on the LCD There will be a red and black wire a polarized Molex plug housing and two pins remaining These are for LCD displays that do not have a 16 pin header but rather a 14 pin header Pins 15 and 16 supply power to the LED back...

Страница 7: ...as components heating up smoke or smell Remove power immediately if anything unusual appears Place the ground lead of your voltmeter on pin 2 of U3 This will be the ground reference for the rest of the measurements Measure the voltage on the voltage regulator U5 on the pin furthest from the power jack It should be between 8 and 14V If it is 0V then L1 is likely missing or damaged If it is low the ...

Страница 8: ...t U4 Pin 2 Greater than 8V Check IC socket C8 C9 C10 C11 U4 Pin 6 Less than 8V Check IC socket C8 C9 C10 C11 Remove power from the T238 Locate the flat ribbon cable Notice that one of the leads nearest one of the edges is a bluish color compared to the rest This lead denotes pin 1 You may wish to place another indication of pin 1 such as a sticker on the connectors WARNING Polarity of the flat rib...

Страница 9: ... not cause any damage but the unit will not work Some telephone cables reverse the wires and some do not In addition some telephone cord couplers reverse the wires Find a telephone cable that does not reverse the wiring Hold the connectors side by side and oriented the same direction for example the clip tab down on both connectors Observing the red and green wires inside If for example red is on ...

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