Samsung SGH-A500 Service Manual page 24

11. DCS Reciever
<Test C ondition.>
1. Phone Tool I nline M ode :
- R F M ode : R x C ontinuous.
- A R FC N : R x 711C h.
- G ain : R x 88.
2. G enerator R F L evel :-50dBm .
3. M easure with H ew lett Packard 85024Aactive high frequency probe.
¡æM easured V alue is dependent on Probe M easured Point of C om ponent.
¡ÜFlowC hart.(D C S : R x Trouble Shooting)
C h eckR F (1 845 M H z)
L evel a t C 112
> -55d B m
C h eckR F
L ev elatC 223
C h eckR FL evel a t
L 20 5>-65 d B m
C h eckI F (360 M H z)
L evel a t C 2 29>
C h eckI F (36 0M H z)
L evel B othS id e a t
L 209>-40d B m
an dA lm ost S a m e
L evel
C h eckth e B a seb an d
L ev el(V p p: 1V ) a t
8, 9, 10, 11p inof
U 2 01
SGH- A500 Flow Chart of Troubleshooting and Circuit Diagrams
N o
R ep la ce orR esold erth eC O N 10 1&
Y es
N o
C h eckth e C r ack
&S o ld erin gof
U 101
Y es
R esold ero rR ep la ce th e
U 10 1
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R eso ld erorR ep la ce L 20 5,
F 20 1
Y es
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L evel(> -5 d B m ) an d
(1 485M H z) R F _ O u t
Y es
L evel(> 0.6V p p ) a n d
F req u en cy(13 M H z)
N o
R esold ero rR ep la ce th eF 204 , L 20 4, C 228 ,
Y es
N o
SAMSUNG Proprietary-Contents may change without notice
C 112
C h eck0~ 0.5V
a t 2p in , 1 0p ino f
O K
U 101
N o
R esold erth eU 105,
U 1 04
C h eckth eP incon n ect io n (V R F 1) B etw een
7, 1 9, 26, 30, 38 , 3 9p ino f U 201a n d31
C h eckth e
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F req u en cy
of O S C 2 01
H a vin gS o m e D efect a t B 'd¡æ N eedT osen d
Y es
C h eck
N o
o f O S C 20 2
R esod ero rR ep la ce th eO S C 2 02, R 2 26,
C 2 34, L 218
C h eckth e 2 n dL o ca l
N o
F r eq u en cy (1440 M H z)
o nb esid e th e 3 8p in
of U 20 2
6- 9
N o
p inof U 60 1.
N o
C h eckV o lt ag e a t
7, 19 , 2 6, 30, 38,
3 9p ino f
U 201 (2.6~ 2. 9V )
toK o rea
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C h eckV olta ge(2.6
~ 2.9) a t 4p ino f
O S C 202
Y es
L 206
R esold ero rR ep la ce th eC 23 9,
C 22 2, R 2 15