Gsm Transmitter - Samsung SGH-E330N Service Manual
Gsm telephone
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Also See for SGH-E330N:
- User manual (95 pages) ,
- User manual (192 pages) ,
- User manual (93 pages)
Table of Contents
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Flow Chart of Troubleshooting
7-13. GSM Transmitter
TX ON (5Level)
Y e s
U103 Pin7
> = 20dBm
No
U103 pin11
> = 20dBm
No
U102 pin6
> = 20dBm
No
U102 pin48
> = 3dBm
No
OSC101 pin1
> = 6dBm
No
U100 pin6 , 7 , 8 , 9
> = 500mV
No
Check U706
END
Y e s
Resolder CN502, C144
Y e s
Y e s
Resolder L113, L 114, C 151
Y e s
Y e s
Y e s
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Check U103
pin4 = H (2.68V) ,
pin2 , 8 = L
No
Y e s
Check U102
VBATT , pin42 , 4 3
OK?
No
Resolder R123
Check U100
No
pin4 > = 4.0V
pin22, 2 8 > = 2 .7V
OK ?
Y e s
7- 20
Y e s
Change or Resolder U100
Check ANT Switch
control circuit
Resolder or Change U102
or check PAM control signal
Check +VBATT
Check & Resolder
RF PSU Part
Resolder U100
or check Txcpo(R114)
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