Multimeter; Troubleshooter; Repair Actions - Sony Ericsson K800 Electrical Repair Manual

General
The purpose of this document is to indicate the electrical level repair actions associated with the different
failure symptoms.
For symptoms that have multiple repair actions, the repair actions are listed in order of their probability of
creating a successful repair. The fi rst action has the highest probability, and subsequent actions have lower
probabilities. The intention is for the repair technician to implement the fi rst repair action and then retest
the phone. If the phone continues to fail the same test, then the technician should continue to the second
repair action. If the phone continues to fail the same test after all of the repair actions are exhausted,
then the phone will be considered not reparable at this level. This document should be used only after the
actions from the Mechanical Trouble Shooting Guide have been exhausted for the specifi c symptom.
Voltage, current, and resistance information is provided for some symptoms to enable faster repairs.
Perform current measurements using a dummy battery and power supply with digital current display.
The phone should be fully assembled. Perform voltage and resistance measurements with a multimeter.
Purchasing this equipment and performing these measurements is optional but recommended.

TROUBLESHOOTER

Perform current measurements using a
dummy battery and power supply with
digital current display. The phone should
be fully assembled.
Perform voltage measurements with a

multimeter.

Perform resistance measurements with a
multimeter.

Repair Actions

Repair Actions for Manual Test Failures
Failure Failure Symptom
Current draw greater than 300 mAmps
Current draw when powered off
Hangs at gray display. Constant
vibration. Will not power off.
Draws current when pushing power key,
Power On / Off
returns to zero
Powers on by itself after installing
battery. Will not power off.
No response when pushing power key
(no current change)
Phone hang when Bluetooth is turned
on.
If you can't recreate the phone hang
problem, you should check that
Bluetooth is switched on to eliminate
this possibility
Permanent phone hangs at start up or in
standby
Other symptoms
USB icon does not fl ash
Error message "USB device not
recognized"
USB icon fl ashes
Progress indicator appears with red X
Software Flash
No response from computer or phone
Measure V2201 with positive lead on the
Anode.
VDC should equal 0.15 to 0.19.
Other symptoms
SEMC Electrical Repair Manual
K800 - K810
Repair Action
•
N2000
•
C22109
•
K790 ONLY – N1100
•
K800/K810 ONLY –
•
A1200 – Approved Centers Only
•
C22109
•
K790 ONLY – N1100
•
K800/K810 ONLY –
•
A1200 – Approved Centers Only
•
A1300 – Approved Centers Only
• B2100
•
Run pre-confi guration using EMMA
•
N2000
•
D2301
•
N2200
•
Replace S2500 if damaged
•
V2504
•
Replace S2500 if damaged
•
D1400
•
K790 ONLY (ROA revision R3A
and R3B only) – Replace R1404 and
R1405
•
Replace X2200 if damaged
•
N2000, D2301
•
N2300, D2304
•
D2301
•
V2301
•
If VDC is outside of range, then
replace V2201
•
V2220
•
D2301, D2304
1202-3085 rev. 2 48 (121)