Ans. The battery needs continuous charging when there is a Tx/Rx operation. Because the operation consumes more power. There is power loss because of the added expansion and test points. Where as there is no need of charging during other section experiments.
Note : More Q’s will be added after feedback.
Glossary
BGA: A ball grid array is a type of surface-mount packaging used for integrated circuits. It is descended from the pin grid array (PGA), which is a package with one face covered (or partly covered) with pins in a grid pattern. These pins are used to conduct electrical signals from the integrated circuit to the printed circuit board (PCB) it is placed on. In a BGA, the pins are replaced by balls of solder stuck to the bottom of the package. The device is placed on a PCB that carries copper pads in a pattern that matches the solder balls. The assembly is then heated, either in a re-flow oven heater, causing the solder balls to melt. Surface tension causes the molten solder to hold the package in alignment with the circuit board, at the correct separation distance, while the solder cools and solidifies. The composition of the solder alloy and the soldering temperature are carefully choose so that the solder does not completely melt, but stays semi-liquid, allowing each ball to stay separate from its neighbors. The BGA is a solution to the problem of producing a miniature package for an integrated circuit with many hundreds of pins. Pin grid arrays and dual-in-line surface mount (SOIC) packages were being produced with more and more pins, and with decreasing spacing between the pins, but this was causing difficulties for the soldering process. As package pins got closer together, the danger of accidentally bridging adjacent pins with solder grew. BGAs do not have this problem, because the solder is factory-applied to the package in exactly the right amount.
COBBA: Common Base Band Analog.
RTC: Real Time Clock.
ASIC: Application Specific Integrated Circuit. RF: Radio Frequency
LCD: Liquid Crystal Display.
VCO: Voltage Controlled Oscillator
VCTCXO: Voltage Controlled Temperature Compensated Crystal Oscillator
PA: Power Amplifier
COG: Chip on Glass Technology
TDMA: Time Division Multiple Access FDMA: Frequency Division Multiple Access
Scientech Technologies Pvt. Ltd. 82 Service Tips
Important: The operation of ST2132 is similar to that of a Nokia 3310/3315 mobile phone.
Problems:
1. Drop network- network bars varies a lot.
Solution:
a. Move a little bit closer to the Window / open the windows. b. Try SIM of another 900 MHz service provider.
2. No Network - No bars are observed on the screen.
Solution:
ST2132 has been set to automatic network search option during calibration for ideal conditions. Process for changing it to manual is
a. Menu > Settings > Phone settings > Network selection > 1. Automatic (Select) --- 2. Manual.
b. The phone starts Searching (a bar is displayed). c. After searching a list of available networks is listed. d. Select the network of the SIM inserted.
e. Again a bar with Requesting is displayed & network is selected. f. Try by switching ‘On/Off’ the trainer 3 -5 trainer with SIM inserted.
3. “Reconnect Charger” appear on the screen
Solution:
a. Switch ‘Off’ charging b. Then switch ‘Off’ trainer
c. After few second switch ‘On’ trainer and charging.
4. No charging indication after the charging is switched ‘On’.
Solution:
a. Check mains cord is connected properly. b. Check fuse.
c. Check any of the pins of switched fault 1 & 2 are not in ‘Off’ position.
Solution :
a. Check pin 1 of Switched fault is not in off position. b. Switch ‘Off’ charging & then trainers remove the battery. c. Again insert the battery & switch ‘On’ the trainer.
d. Now switch ‘On’ the charging.
6. No display on the screen.
Solution :
a. First confirm the trainer is ‘On’ by LED’s.
b. Slightly press (use limited pressure) LCD Module to check for lose contacts.
7. Trainer gets ‘Off’ when Tx/Rx operation or as soon as switched ON.
Solution :
a. Check the battery provided is supplied by us. b. Battery might be too low.
c. Connect the battery, don’t switch ‘On’ trainer.
d. Switch ‘On’ the Charging & wait for 3- 5 minutes before switching ON the trainer
Scientech Technologies Pvt. Ltd. 84 Warranty
1 We guarantee this product against all manufacturing defects for 24 months from
the date of sale by us or through our dealers. Consumables like dry cell etc. are not covered under warranty.
2 The guarantee will become void, if
a) The product is not operated as per the instruction given in the Learning
Material
b) The agreed payment terms and other conditions of sale are not followed.
c) The customer resells the instrument to another party.
d) Any attempt is made to service and modify the instrument.
3 The non-working of the product is to be communicated to us immediately giving
full details of the complaints and defects noticed specifically mentioning the type, serial number of the product and date of purchase etc.
4 The repair work will be carried out, provided the product is dispatched securely
packed and insured. The transportation charges shall be borne by the customer
List of Accessories
1. Patch Cord 16” ... 1 No. 2. Head Phone... 1 No. 3. Mains Cord ... 1 No. 4. Battery Nokia... 1 No. 5. Learning Material (CD) ... 1 No. Optional Accessories :