Dcs Transmitter - Samsung SGH-E810 Service Manual
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Also See for SGH-E810:
- User manual (192 pages) ,
- Quick manual (189 pages) ,
- Quick start manual (13 pages)
Table of Contents
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10. DCS Transmitter
NO
U401 Pin#8
About 2~3 dBm?
YES
C401,CN400
Check & Change
C402
= 3.7V?
YES
Level of
U400 Pin #6 is
1.2V?
YES
YES
U400 pin#1
About -5 dBm?
NO
U400 pin#3
High ?
YES
Change U400
U404 Check
Pin#9,32 ≥ 2.8V ?
U404 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
NO
U404 Pin
#4,5,6,7 = 1.7V?
Check U300
Change U400
U401
Pin#11 = High?
YES
NO
Level of
U401 Pin#3 is
4~5dBm ?
YES
U401,L402,C405,407,408
Check & Change
NO
Check the
Battery Block
NO
Check
& Change R401
OK ?
YES
NO
Check U300
NO
YES
OSC400 Check
NO
Pin #3 : 13MHz ?
Vpp : 950mV?
YES
YES
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-E810 Flow Chart of Troubleshooting
NO
U300,302
Check & Change
Continuous TX ON condition
TX Power Code : 350 code Applied
NO
Check & Change
U100,C107,C109
Check or resolder
NO
YES
R413,C428
resolder
2-11
CH : 660
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
U300
NO
OSC400 Check
Pin #4 = 2.8V ?
YES
OSC400
Change or resolder
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