User Guide

PAMS
Technical Documentation
WinTesla User Guide
NHD–4
Page 28
Original 11/97
General
Caution: The phone can not be Tuned properly if connected to the
FPS–3C Flash Programming Box. Please use only one of the setup
configurations listed in the “Dealer Setups” section of the NHD–4NX
Service Manual.
Battery Voltage Adjustment
A reference value for the battery is calibrated by using an accurate 6.0 V
supply.
Calibration of the A/D converter channels:
– Using the JBS–7 service jig, replace the standard battery of the phone
with the dummy battery BTS–4.
– Apply +6.0 V to dummy battery.
– Select ” Tuning – Battery voltage”.
– The Program reads the 6 Volts applied and displays the corresponding
A/D reading fed to the phone via the VBATT line.
– Store this new value to the phone by pressing ”Tune”. Then Exit
Charge Voltage Adjustment
A reference value for charge voltage is set by using an accurate 6.0 V
supply.
Calibration of the charge voltage:
– Using the JBS–7 service jig, replace the standard battery of the phone
with the dummy battery BTS–4.
– Apply +6 V to VCHARGE line.
– Select ”Tuning – Charge voltage ”.
– The Program reads 6 V, A/D reading fed to phone VCHARGE line.
– Store this new value to the phone by pressing ”Tune”. Then Exit
RF Temperature Adjustment
This adjustment should be made with the phone at room temperature. It
is important that all RF transmitter tunings be done as quickly as possible.
This is to ensure that this reference temperature adjustment is within limits
required for temperature compensation.
Calibration of the RF Temperature:
– Using the JBS–7 service jig, replace the standard battery of the phone
with the dummy battery BTS–4.
– Apply +6 V to VCHARGE line.
– Select ”Tuning – RF Temperature ”.
– Press ”Tune”. The Program reads the internal thermistor value and
stores this value to the phone.