TEST YOUR SKILL IN MOBILE PHONE REPAIR [LEVEL 1]
TEST YOUR SKILL IN MOBILE PHONE REPAIR [LEVEL 1]
Total Questions: 50
you'll have 30 second to answer each question.
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Quiz Answers
1. How do you professionally confirm that a capacitor is short?
Both terminals beeped when checked for continuity with ground
2. When a non-IP device is dropped in water, it is always ideal to continue operating it as long as everything works
False
3. A LED mobile charger is plugged into a mobile phone. It was noticed that as soon as the phone is plugged in, the LED in the charger turns off. The LED turns on when the charger is unplugged from the phone. It can be deduced that
The phone is internally short
4. A Redmi phone is reported for charging but the battery's percentage is not increasing. Another charger is tested and the problem remains the same. What is the first professional diagnosis to carry out?
Check the voltage reading on the battery connector when charger is plugged in
5. A Redmi phone is reported for charging but the battery's percentage is not increasing. A new charger is tested but the problem remains same. On reading the battery connector's, 4.24V is registered. What is the first thing you can deduce is the fault of this phone?
Battery
6. While checking for positive track of a phone's power button, what probe of the multimeter would you place on ground and the positive (test points) for the phone to turn on
Red on gnd, black on test points
7. A Redmi phone is reported for charging but the battery's percentage is not increasing. Tested a new charger, still same. Voltage reading on battery connector when charger is plugged in is 2.10v and the voltage reading in vbus is 5.20v. What can you deduce is the fault of this phone
Charging IC
8. The most common cause of short is
Water
9. I placed the probes of a multimeter that has been set to buzzer mode on two terminals of a diode. I got a beep sound. I can conclude that the diode is
Not working properly
10. You can't track a short with one of these
Short killer
11. Which of these circuit components is the most common cause of short of an entire voltage line to ground
Capacitor
12. A mobile phone that charges when charger is not plugged in is a result of
Internal short of charging track to battery output track
13. A restarting phone is reported. Whenever I remove the battery and place it back, the phone turns on immediately by itself without me touching anything. Then it starts the process of restarting. What is the cause of this
Power button flex
14. A restarting phone is reported. Whenever I remove the battery and reconnect it, the phone won't turn on until I press the power button. After the phone eventually turns on, it begins to restart. What is the first thing I need to do?
Hard reset
15. An iphone 7 is reported for no network. What is the first thing I have to check before I start any repair process?
Check the baseband information from settings
16. You cannot remove FRP or Google account verification lock without PC
False
17. Every battery connector has three or four terminals which are vbat, gnd...
BSI and Id
18. It is not important to put tag to iPhone battery while trying to reprogram it to fix non-genuine or important battery message.
False
19. In order to fix important battery message on iphone, one of these needs to be transferred from the OG battery to the new battery
BMS or battery flex
20. The iphone 12 CPU is
A14
21. iPhone 6 can be upgraded to iOS 15
False
22. An Infinix phone is reported for no backlight. What is the first thing I should test?
New Screen
23. A bad WIRELESS CHARGING FLEX can lead to temperature to high or too low on Samsung phones
True
24. What is the major cause of temperature too high or low on itel phones?
Poor communication between BSI and its circuit component
25. What will be your advice to me IF I were a novice and I'm about to replace an iphone backglass for the first time with heat gun.
Take out all the iphone internals before you begin the work
26. One of these cannot be used to restore or update an iphone
ZXW
27. One of these is not a cause of iphone restart
Panic-Full Log
28. One of these is usually used to precisely diagnose cause of iphone restart
Panic full log
29. SEP stands for
Secure enclave processor
30. A diode allows current to flow in both forward and backward directions
False
31. In a Micro USB charging connector, the first and the fifth legs are used for charging. On USB Type-C, what legs are responsible for charging
1st and 4th, 9th and 12th
32. To read charging input voltage using a multimeter, the red and black probes should be placed on...
vbus and gnd respectively
33. A battery with a voltage of 3.0v can start up a phone
False
34. A Samsung smartphone is reported for system crash and inability to start up. What am I to do first?
Hard reset
35. Board schematics can be sourced from all of these but one
Albastuz3d
36. What is the most common cause of charging error temperature too high or low on Samsung mobile phones?
Charging board
37. I can try to use a soldering iron with a fat mouth to solder a FPC connector
Totally disagree
38. It is always ideal to leave a rework station running and actively blowing hot air when it is not in use
I disagree
39. While I'm assembling an iPhone, I can use any screw anywhere I like
Big no
40. Panic base is the same as Panic full
False
41. An iphone is reported that whenever the charger is plugged in, a message 'charging not available, Liquid has been detected in Lightning connector's comes up. What are the two card-Level solutions
Replace the charger cable or charging connector flex
42. The network cable of a mobile phone can be replaced using a jumper wire. Without using a multimeter, how can I identify where to jumper from and to
The positive on the network cable connectors on main board and sub-board has visible tracks that continues them while the gnd on both connectors do not
43. One of these cannot cause a mobile phone to go dead
Bad screen
44. The LED that is responsible for the backlight in LCDs are connected in
Series to one another
45. One of these is not a source of knowledge for mobile phone repair
Onlyfans
46. Easy Money! iPhone 11 restarts after every 3 minutes. The panic log indicates a missing sensor 'mic2'. What am I to change to get back a fully functional iphone
Power button flex
47. Easy Money! iPhone 12 restart after every 3 minutes. On the panic full log, a missing sensor is indicated which is 'prs0'. What am I to change to get back a fully functional iphone?
Charging connector flex
48. iPhone XS Max goes off while charging but immediately charger is removed, it turns back on. What am I to change to get back a fully functional iphone
Charging connector flex
49. Charging but percentage is not increasing can be corrected by changing charging IC. In the absence of a replacement charging IC, which of these can be used?
Zener diode 5.1v
50. iPhone 6+ / 6S+ touch disease is fixed by
M1 jumper in meson
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