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Customer Care Europe, Middle East & Africa
SCCE Training Group
Correct component replacement in UB4_ 10 or later of NHM-5 (SB053) and NHM-6 (SB31)
If changing the power amplifier (N502) & antenna switches (Z502) is necessary, it is recommended to replace with the same type
as the removed one.
The information in tables "PA vendor depent RF discrete component mount" and "Ant.sw./diplexer depent RF discrete components
mounts" in NHM-5/6 Service Manual must be followed if there is a really essential reason to use different type of power
amplifier or antenna switch as replacement
Only the following combinations of power amplifier and antenna are allowed for NHM-5/6:
Power Amplifier
Hitachi (4350259)
Phillips (4350269)
RFMD (4350277) Matushita (4550201)
Note:
- After changing Power Amplifier, TX Power Tuning has to be carrying out.
- After changing Antenna Switch, Tx Power Tuning and RX Calibrations have to be carrying out.
After the Power Amplifier replacements, additional it should be checked in which constellation R311 and R312 were assembled
(marked "X").
If necessary, adjust the resistors in the corresponding order to the type of PA.
Use for it the table below (PA vendor detection) as reference. (NHM-5; SB 25)
This is important because of the differences between the three power amplifier versions in use.
In UP4 Hitachi PA has been used while UD4 includes Philips PA and UG4 uses RFMD power amplifier.
Last mentioned is available as spare part meanwhile.
For PCB version up to Version 09
PA vendor detection
PA vendor Part. No. R312 (PA_vendor2) R311 (PA_vendor1)
RFMD 435X231
Mounted
Phillips 435X194
Hitachi 4350259
© NMP 2002
NHM-5
Antenna Switch
Murata (4550131)
Matushita (4550201)
Mounted
CONFIDENTIAL
NHM—2/5/6
3410
Date 20.11.2002
NHM-6
Power Amplifier
Hitachi (4350259)
Phillips (4350269)
PCB version 10 and later
PA vendor detection
PA vendor Part. No. R312 (PA_vendor2) R311 (PA_vendor1)
RFMD 435X231
Phillips 435X194
Hitachi 4350259
Checked by:
Customer Care E&A
12 (44)
Repairhints
Version 4.0 Approved
Antenna Switch
Murata (4550131)
Murata (4550131)
Mounted
Mounted
Mounted
Mounted
Approved by:
SCCE Training Group
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