Myalarm V-LCD1 Manuel d'instructions télécharger pdf (Page 269)

EPROM & RAM CHIPS

11-263

System 2 Installation / Programming Manual

CHAPTER 11

INSTALLING AN EPROM OR RAM

1. Remove the external battery. (Unplug the battery harness - H1)

2. Unplug or disconnect the internal battery (H4).

3. Unplug or disconnect the 16.5VAC transformer.

4. Wait 120 seconds for all power supply capacitors to discharge.

5. Locate the EPROM or RAM chips. They are located to the left and directly under the

programming keypad. The EPROM is identified as U4. Expansion RAM1 is identified as U5.

Expansion RAM2 is identified as U6.

STATIC SENSITIVE PARTS - DISCHARGE YOURSELF TO GROUND

6. Touch earth ground (Terminal #1) to discharge any static electricity on yourself before touching

the circuit board.

7. Remove the old EPROM and/or RAM chips from their sockets. This is accomplished using a

professional-type DIP extractor or it can be removed by using a very small screwdriver.

Carefully insert the blade of the screw driver or DIP extractor between the chip and its socket.

With a rocking-pulling motion, work the chip loose.

8. Align the pins. As shipped to you, the chip will not fit into its socket. Ensure you are "static

free". Grasp the chip at both ends and lay one row of pins on a flat surface. Gently apply

pressure in a slight rocking motion until one side is perpendicular to the chip’s body. Then, do the

same procedure to the other side. The objective is to align all the pins so they are perpendicular

to the chip’s body.

9. The notch in the chips body must be at the "TOP".

10. Line up the pins of the chip with the socket and using your fingers, gently press into place with

a slight rocking motion. Sometimes a pin will bend inward under the chip and not be readily

noticeable. If this happens, remove the chip and reinsert it correctly.

11. The RAM sockets will accept two widths of chips. You may receive either. Line up the pins of

the RAM chip with the left most socket associated with that chip. The pins on the right side of

the chip will automatically align to the proper socket.

12. Connect the 16.5VAC transformer to power up the unit and reconnect the external standby

battery.

13. When installing RAM chips the backup battery must be connected to H4. The black lead from

the battery goes to Terminal #3 on H4. The red lead goes to Terminal #2 on H4. Refer to

Figure #33.

14. Enter your Secret Number and CLEAR ALL MEMORY. All user codes will be cleared and all

system values will be set to default (factory standard) condition.

15. If the RAM or EPROM is installed backwards, or if it is handled improperly, it will be damaged.

16. Reprogram all codes, time schedules and system settings.

1 2 ... 264 265 266 267 268 269 270 271 272 273 274 ... 335 336

Pas de commentaire

Myalarm V-LCD1 Manuel d'instructions Page 269