INTRODUCTION
SFO Technologies, the flagship company of NeST Group, incorporated in 1990,
provides total ODM Plus solutions to diverse industries such as Aerospace &
Defence, Communications, Energy & Industrial, Healthcare and Transportation.
Growing from EMS to ODM and now to ODM plus Solutions, SFO is known to
bundle our own IPs, ready-to-use product building blocks, IoT, Analytics & Mobility,
Cloud, AI, and expertise in related technologies such as GIS, Enterprise solutions,
Data Warehousing, Business Intelligence, etc.to provide value add for our OE
customers. Our ODM plus Solutions function as enabler to re-define standards for the
electronics industry.
With a global footprint and facilities in Kochi, Trivandrum, Bangalore, Mysore and
Pune in India, SFO is known to nurture all our stakeholders – customers, employees,
suppliers, partners and the society in general.
-:Hardware Design:-
As part of our integrated ODM Plus Solutions, the R&D team of SFO
Technologies stays tuned to the technology curve, to innovate, conceptualize
and create the technologies, tools, systems and processes needed to create novel
products. The focus is on ideas that make products user-friendly, energy
efficient, eco-friendly and to bring in value-added features which eventually
viz. Healthcare, Transportation, Communications, Aerospace &
Defence, Energy & Industrial. SFO R&D Centre is recognized by the
Department of Scientific & Industrial Research, Government of India. The
services are extended to many Fortune 500 companies on advanced technology
projects and build-to-spec solutions. The Centre also maintains close association
with Government laboratories, leading Universities and institutes to keep abreast
on state-of-the-art technology trends.
SFO ensures that, all aspects of the product – form, fit and function – are
addressed holistically with a view enhance user experience and ensure low Total
Cost of Ownership.
Electronics Design:-
The electronics team offers design services ranging from the architecture
level to Printed Circuit Board level to suit customer-specific requirements. The
team has a rich track-record in high-speed digital designs, analog and mixed-signal
designs and embedded system development. Micro-Controllers/Micro-Processors
from leading OEMs such as TI, Freescale, Cypress, AVR, Microchip, Xilinx,
Lattice, Altera etc are supported. The high-speed designs are verified post-layout
using SI (Signal Integrity) simulation, using tools such as Hyperlynx and SPICE,
followed by detailed design verification/validation testing. Orcad, Allegro, Mentor,
Altium, Pads, etc are typically the tools used for schematics capturing and PCB
layout design. Prototype assembly is carried out using the associated
Manufacturing facilities. Testing and measuring laboratory is equipped with
instruments such as High speed Oscilloscopes, Logic Analyzers, JTAG Interface,
Network Analyzers, Spectrum Analyzers, Field probes etc. While we have multiple
testing chambers for carrying out the required Environmental tests, certain tests
such as EMI (Electro Magnetic Interference) and EMC (Electro Magnetic
Compatibility) are outsourced to NABL certified external labs.
INTRODUCTION
PURPOSE: This document has been made to understand the Functional test procedure
of Otis DC DC Converter PCBA.
SAFETY INSTRUCTIONS:
1. Use appropriate personal protective equipment.
2. Do not modify any set up without permission
from concerned person.
TOOLS AND EQUIPMENTS DETAILS:
• Programmable DC Power Supply
• Programmable Multimeter
• PC
• Test fixture
SETUP INSTRUCTIONS:
1. The setup procedures mentioned below should be performed by the testing
personnel.
2. Make sure that the fixture is OFF and the emergency switch is pressed.
3. Connect the 230V input supply to the fixture.
Connect the NI card USB cable from the fixture the USB extension cable
Figure 1
4. Connect the DMM connections and Power supply connections according to
the correctly labelled ports on the back of the fixture as shown in the below
figure 2.
Figure 2
5. Make sure that the power supply output is turned OFF before testing.
6. Turn ON the fixture and release the emergency switch to start testing.
7. Follow all the checkpoints as mentioned in the checklist SFT47.0643 daily to
ensure that the tester is in perfect condition
8. Test the golden samples first at the beginning of each shift. The good sample
(HAA26800FD-DDC-04220543) should pass the test and the bad sample
(HAA26800FD-DDC-04220504) should fail the test (figure 3). If this
condition is met, continue with testing the production boards.
Figure 3
PROCEDURE:
1) Click on Otis DC DC test tool which is present in desktop. (figure 4)
Figure 4
2) Before placing the Board in the fixture make sure the three lights in the tower
should not blink. If the tower lamp is blinking, close the software and open again and
re-verify that the tower lamp is not blinking. (figure 5)
Figure 5
3) Click on the login, refer below fig 6 .Type username and password (credentials
of the testing personnel).
Figure 6
Figure 7
4) Click on the green icon present on the top as shown in fig below. Once pressed,
a dialogue box appears to scan the serial number of the DUT. (figure 8)
Figure 8
Figure 9
5) Place the board in the test fixture properly and Close the top lid of the test fixture,
and scan the serial number of the DUT, refer fig 10,11 below and start the test by
pressing Enter.
Figure 10
Figure 11
6) The test continues automatically and after the test is completed, we can see
“Test completed “and “PCBA PASSED/FAILED testing successfully “at the bottom.
Refer fig 12 below.
Figure 12
7) If the board passed all the test cases then in the bottom of the screen we can
see in green colour as “PCBA have PASSED testing successfully" and the tower lamp
blinks GREEN. These boards keep in pass bin with identification (dot mark) as shown
in below figure 13. If the board fails testing, the screen shows “DC DC board failed
testing” and the tower lamp blinks RED.
Figure 9
5) Place the board in the test fixture properly and Close the top lid of the test fixture,
and scan the serial number of the DUT, refer fig 10,11 below and start the test by
pressing Enter.
Figure 10
Figure 11
6) The test continues automatically and after the test is completed, we can see
“Test completed “and “PCBA PASSED/FAILED testing successfully “at the bottom.
Refer fig 12 below.
Figure 12
7) If the board passed all the test cases then in the bottom of the screen we can
see in green colour as “PCBA have PASSED testing successfully" and the tower lamp
blinks GREEN. These boards keep in pass bin with identification (dot mark) as shown
in below figure 13. If the board fails testing, the screen shows “DC DC board failed
testing” and the tower lamp blinks RED.
Figure 13
8) If the any test got failed then retest the boards, if it is passed in retest then test it
again. If it passed again in retest such that the board passes two times consecutively,
move it to OK bin.
9) If it is failed in retest then move the board to debug with proper identification.
10) If boards are failing continuously then test the Golden board/ Known Good
Board, if it passed then continue with the production board testing and if it failed
then notify the Production Supervisor.
-:Software Design:-
SFO Technologies has software teams specializing in firmware, embedded
software and related platforms such as GIS, Enterprise solutions, digital
technologies, etc that are assessed at CMMI Dev v2.0/5 maturity level and
enjoying a slew of ISO certifications that help us offer world-class software
services coupled with design, engineering, and manufacturing services. SFO has
immense expertise in delivering fully integrated solutions
across Healthcare, Transportation, Communications, Aerospace &
Defence, Energy & Industrial domains. These teams are located in state-of-the-
art facilities in Kochi, Thiruvananthapuram, and Bengaluru in India, Dubai,
UAE and selected locations in the USA. Our software capability is proven with
many of our customers who are able to get their final product into the market
faster, as we offer total solution under one roof starting from design, engineering,
and software development to manufacturing of the final product.
Whatever the operating platform (Embedded, Desktop, Client-Server, Web,
Cloud, IoT, etc) the software operates on and whatever its purpose (simulate,
monitor, measure, control, automate, display, report, analyze or store) SFO
follows standard processes and development methodologies (Agile, iterative or
waterfall) to create software. Being a responsive organization, SFO gathers
customer inputs such as high level system requirements, specific design (if
required), clarification on requirements, tools which would be provided by the
customer, planned support for test set up, any specific requirements on using
development/ testing tools, standards to be followed, inputs on test environment,
etc to guide the development process.
We also have expertise in using peripherals like ADC, WDT, I2C, I2S, PWM,
PORT, SPI, DDR3, PMIC, Display drivers, Serial flash, EMMC flash, SDIO in
putting together the systems
