Sony Ericsson W890 Troubleshooting Manual page 105

Equipment Setup
Note: During calibration the accurate voltage from VBATT must be within ±0.015 V. If this is not
fulfilled it will cause a faulty calibration. For more information about recommended power supply units,
see the Repair Tool Catalogue in CSPN under the Mechanical level. The Power Supply Channel 1 VBATT
must allow reverse current.
Note: phone must be flashed with ITP Software.
Before starting calibration test, the
Instructions for Customization of Power Supply Channel 2 DCIO/SEPI Cable
To perform Current Calibration the phone must be powered directly through the system connector.
Customize the cable according to following instructions: Take the CST-75 battery charger and cut off
the charger according to picture 1. Length of the cable must be exact 1.3m. Connect the CST-75
charger Red or White cable to the Positive (+) Output at Power Supply and the Black cable to the
Negative (GND) Output at the Power Supply according to picture 2. Cut off isolation material from
inside of the charger plug according to picture 3.
Picture 1
Picture 2
Picture 3
APPENDIX Troubleshooting Software Documentation
Power Supply Channel 2 DCIO/SEPI Cable Connection Setup
Note: The Power Supply Channel 1 (VBATT) must allow reverse current.
Note: The maximal cable length between the Power Supply Channel 1 VBATT and the dummy battery
must not exceed 1m. The cable must have a capacity for at least 16A.
Picture 4
Correct DCIO and SEPI A1 Cable setup when the Troubleshooting Fixture is used.
Picture 5
Correct DCIO and SEPI A1 Cable setup when a Dummy Battery is used.
Picture 6
This setup between DCIO and SEPI A1 Cable is WRONG!
Note: Voltage and Current settings for the Power Supply Channel 1 VBATT and 2 DCIO/SEPI can be
found in the Equipment List included in the Product Specific Troubleshooting Manual.
Note: Instructions about the Troubleshooting fixture connections with the External RF connector,
Display, SIM Card, Memory Stick Card, Keyboard etc. can be found in Troubleshooting Fixture
Connection Instruction included in the Product Specific Troubleshooting Manual.
SEMC Troubleshooting Manual
W890
1217-3942 rev. 1 105 (119)