4. TROUBLE SHOOTING
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Only for training and service purposes
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ͽͶ ͺΟΥΖΣΟΒΝ ΆΤΖ ΟΝΪ
4.4 WCDMA Transmit block
Chart 3 WCDMA Transmit Block sequence
To check WCDMA TX block, there are 6 procedures.
1. Battery Level check
A. Check if main battery voltage is 3.6V to 2V at C108(TP1), C126(TP2)
2. Power level check at Antenna switch.
Suppose that UE output power is max
Check Power level
re TP3,4,5
over 21dBm?
Duplexer is okayG
yes
re TP6, 7, 8
over 22dBm?
PA is okay
yes
no
re TP9, 10, 11
over 3dBm?
SAW Filter is okay
yes
no
Check MDM Baseband Block
no
re TP12, 13, 14
over 4dBm?
MDM Output is okayG
yes
no
BATT Power okay?
TP1, TP2
Power Supply is okayG
yes
No – Check Powe
re TP3,4,5
over 21dBm?
Duplexer is okayG
yes
re TP6, 7, 8
over 22dBm?
PA is okay
yes
no
re TP9, 10, 11
over 3dBm?
SAW Filter is okay
yes
no
Check MDM Baseband Block
no
re TP12, 13, 14
over 4dBm?
MDM Output is okayG
yes
no
BATT Power okay?
TP1, TP2
Power Supply is okayG
yes
No – Check Powe
ͽͶ ͺΟΥΖΣΟΒΝ ΆΤΖ ΟΝΪ
4.4 WCDMA Transmit block
Wrong Power level
is TP3 or 4 or 5
over 21dBm?
Check FEM
yes
Is TP6 or 7or 8
over 22dBm?
Check Duplexer
yes
no
Is TP9 or 10 or 11
over 3dBm?
Check Power Amplifier
yes
no
Check MDM RF Block
no
Are TP12, 13, 14
over 4dBm?
Check SAW Filter
yes
no
BATT Power okay?
TP1, TP2
Check power
no
yes
Wrong Power level
is TP3 or 4 or 5
over 21dBm?
Check FEM
yes
Is TP6 or 7or 8
over 22dBm?
Check Duplexer
yes
no
Is TP9 or 10 or 11
over 3dBm?
Check Power Amplifier
yes
no
Check MDM RF Block
no
Are TP12, 13, 14
over 4dBm?
Check SAW Filter
yes
no
BATT Power okay?
TP1, TP2
Check power
no
yes
Chart 3 WCDMA Transmit Block sequence
To check WCDMA TX block, there are 6 procedures.
1. Battery Level check
Check if main battery voltage range is within 3.6V and 2V at C108(TP1), C126(TP2)
2. Power level check at Antenna switch.
Suppose that UE output power is max
Check if Maximum output power is over 21dBm
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