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DUAL BAND GSM
TELEPHONE
SGH-A300
SERVICE Manual
DUAL BAND GSM TELEPHONE CONTENTS
1. Exploded Views and Parts List
2. Electrical Parts List
3. Block Diagrams
4. PCB Diagrams
5. Flow Chart of Troubleshooting and
Circuit Diagram
1. Exploded Views and Parts List
1-1 SGH-A300 GSM Telephone Exploded View
1-2 SGH-A300 GSM Telephone Parts List
1-3 SGH-A300 Travel Adapter
1-4 SGH-A300 Travel Adapter Parts List
1-5 SGH-A300 Cigarette Lighter Adaptor
1-6 SGH-A300 Cigarette Lighter Adapter Parts List
1-7 SGH-A300 Test Jig
1-7-1 SGH-A300 Test Jig Cable
1-7-2 SGH-A300 RF Jig Cable
1-7-3 SGH-A300 Test Jig
2. Electrical Parts List
3. Block Diagrams
3-1 Main Block Diagram
3-2 Main RF
3-2-1 RF Tx Part
3-2-2 RF Rx Part
4. PCB Diagrams
4-1 Main Top
4-2 Main Bottom
5. Flow chart of trouble shooting
5-1 Power ON
5-2 Initial
5-3 Sim Part
5-4 Charging Part
5-5 Microphone Part
5-6 Speaker Part
5-7 Key Data Input
5-8 Ring Indicator
5-9 Back Light
5-10 Alert Tone
5-11 GSM Receiver
5-12 GSM Transmit
5-13 DCS Receiver
5-14 DCS Transmit
SAMSUNG Proprietary-Contents may change without notice
1-1
1. Exploded View and its Parts List
1-1 SGH-A300 GSM Telephone Exploded View
1
2
12
2-1
12-1 2-2
12-3 12-2 2-3
12-4
3
6
13 12-5
4 5
14 15
7
17 7-1 7-4
16 7-2
7-3 8
21 18
22
9
7-5
20 19
23 24-1 10
24-2 11
24
24-3
24-4
24-5
24-6
26
25
SAMSUNG Proprietary-Contents may change without notice
1-2
Exploded view and its Part List
1-2 SGH-A300 GSM Telephone Parts List
SEC CODE
Location No. Description Blue-Tinted Remark
Silver
Silver
1 DUAL WINDOW GH72-01793F GH72-01793E
2 SUA, FOLDER UPPER GH75-01004B GH75-01004A
2-1 DECORATION GH71-00311B GH71-00311C
2-2 SPONDGE-DUAL LCD GH74-00819A GH74-00819A
2-3 FOLDER UPPER GH72-01795D GH72-01795D
3 F-PCB GH59-00189A GH59-00189A
4 MOTOR GH31-00018A GH31-00018A
5 SPEAKER 3001-001215 3001-001215
6 LCD ASS'Y GH07-00072A GH07-00072A
7 SUA, FOLDER LOWER GH75-01016A GH75-01016A
7-1 SPONGE LCD GH74-00939A GH74-00939A
7-2 MAGNETIC - -
7-3 SUA, HINGE ASS'Y GH75-01087A GH75-01087A
7-4 SPONGE PCB SUPPORT GH74-00953A GH74-00953A
7-5 FOLDER LOWER GH72-02317A GH72-02317A
8 SHIELD NET GH74-01244A GH74-01244A
9 SCREW MACHINE 6001-000464 6001-000464
10 DUMMY LABEL GH68-00370C GH68-00370C
11 LCD WINDOW GH72-02385A GH72-02385A
12 SUA, FRONT CASE ASS'Y GH75-01001A GH75-01001A
12-1 HINGE DUMMY GH72-02420A GH72-02420A
12-2 LED LENS GH72-00287A GH72-00287A
12-3 FRONT CASE GH72-02135A GH72-02135A
12-4 FOLDER HOLDER GH73-00263B GH73-00263B
12-5 SHIELD SPONGE GH74-01243A GH74-01243A
13 VOLUME KEY GH72-01572A GH72-01572A
14 KEY PAD GH72-01582F GH72-01582F
15 MIC 3003-001060 3003-001060
16 SHIELD COVER GH71-00459A GH71-00459A
17 KEY PAD ASS'Y GH59-00188A GH59-00188A
18 RUBBER SUPPORT GH73-00676A GH73-00676A
19 IF CONN-COVER GH73-00756A GH73-00756A
20 BUZZER HOLDER GH73-00653A GH73-00653A
21 PBA GH92-00872A GH92-00872A
22 ANTENNA GH42-00100A GH42-00100A
23 RF JACK DUMMY GH73-00611A GH73-00611A
24 SUA, REAR CASE GH75-01002A GH75-01002A
24-1 ANTENNA BRACKET GH71-00392A GH71-00392A
24-2 EAR JACK COVER GH72-01574C GH72-01574C
24-3 REAR COVER GH72-02136A GH72-02136A
24-4 IRDA WINDOW GH72-02138A GH72-02138A
24-5 LOCKER SPRING GH70-00063A GH70-00063A
24-6 LOCKER-BATTERY GH72-01579C GH72-01579C
25 SCREW MACHINE 6001-00883 6001-00883
26 BATTERY GH43-00315A GH43-00315A 850 mAh
GH43-00316A GH43-00316A 550 mAh
SAMSUNG Proprietary-Contents may change without notice
1-3
Exploded view and its Part List
1-3 SGH-A300 Travel Adapter
A B
C D
1-4 SGH-A300 Travel Adapter Parts List
TYPE SEC CODE REMARK
A GH44-00171A CHINA
B GH44-00184A EUROPE
C GH44-00171C UNITED KINGDOM
D Gh44-00171E TAIWAN
SAMSUNG Proprietary-Contents may change without notice
1-4
Exploded view and its Part List
1-5 SGH-A300 Cigarette Lighter Adaptor
1-6 SGH-A300 Cigarette Lighter Adapter Parts List
DESCRIPTION SEC CODE REMARK
Cigarette Lighter Adapter Code GH44-00195A BLACK
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1-5
Exploded view and its Part List
1-7 SGH-A300 Test Jig (GH80-00161A)
1-7-1 SGH-A300 Test Jig Cable 1-7-2 SGH-A300 RF Jig Cable
(GH39-00096A) (GH39-00026A)
SAMSUNG Proprietary-Contents may change without notice
1-6
Exploded view and its Part List
1-7-3 SGH-A300 Test Jig
DC
POWER
SUPPLY
8922 or 8960
WIRELESS COMMUNICATIONS
TEST SET
RF JIG CABLE
TES
T JI
G
232 CABLE
TEST JIG CABLE
SAMSUNG Proprietary-Contents may change without notice
1-7
2. SGH-A300 Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
1 3002-001101 AU600 88dB, 3.6 V, 100 mA, 2550Hz, TP
2 4302-001119 BAT200 3 V, 0.1MAH, -, -, 3.1 V, -
3 2203-002443 C100 0.33 nF, 10 %, 50 V, X7R, TP, 1005
4 2203-005065 C101 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
5 2203-000386 C102 0.015 nF, 5 %, 50 V, NP0, TP, 1005
6 2203-005571 C103 10000 nF, +80-20 %, 6.3 V, Y5 V, TP, 2012
7 2203-000359 C104 0.15 nF, 5 %, 50 V, NP0, TP, 1005
8 2203-005509 C105 330 nF, +80-20 %, 10 V, Y5 V, TP, 1005
9 2203-000233 C106 0.1 nF, 5 %, 50 V, NP0, TP, 1005
10 2203-000812 C107 0.033 nF, 5 %, 50 V, NP0, TP, 1005
11 2404-001151 C108 33UF, 20 %, 6.3 V, LZ, TP, 3216
12 2203-005571 C109 10000 nF, +80-20 %, 6.3 V, Y5 V, TP, 2012
13 2203-000278 C110 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1005
14 2203-000628 C111 0.022 nF, 5 %, 50 V, NP0, TP, 1005
15 2203-001432 C112 47 nF, +80-20 %, 16 V, Y5 V, TP, 1005
16 2203-000812 C113 0.033 nF, 5 %, 50 V, NP0, TP, 1005
17 2203-005061 C114 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
18 2203-001432 C115 47 nF, +80-20 %, 16 V, Y5 V, TP, 1005
19 2203-000628 C116 0.022 nF, 5 %, 50 V, NP0, TP, 1005
20 2203-000812 C117 0.033 nF, 5 %, 50 V, NP0, TP, 1005
21 2203-005571 C118 10000 nF, +80-20 %, 6.3 V, Y5 V, TP, 2012
22 2203-005061 C119 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
23 2203-005061 C120 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
24 2203-001432 C121 47 nF, +80-20 %, 16 V, Y5 V, TP, 1005
25 2404-001101 C200 1uF, 20 %, 16 V, GP, TP, 2012, -
26 2203-005061 C201 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
27 2203-005509 C202 330 nF, +80-20 %, 10 V, Y5 V, TP, 1005
28 2203-000359 C203 0.15 nF, 5 %, 50 V, NP0, TP, 1005
29 2203-000359 C204 0.15 nF, 5 %, 50 V, NP0, TP, 1005
30 2203-005061 C205 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
31 2203-000254 C206 10 nF, 10 %, 16 V, X7R, TP, 1005, -
32 2203-000679 C207 0.027 nF, 5 %, 50 V, NP0, TP, 1005
33 2404-001101 C208 1uF, 20 %, 16 V, GP, TP, 2012, -
34 2203-000679 C209 0.027 nF, 5 %, 50 V, NP0, TP, 1005
35 2404-001155 C210 100UF, 10 %, 6.3 V, LZ, TP, 4427
36 2203-000359 C211 0.15 nF, 5 %, 50 V, NP0, TP, 1005
37 2203-005509 C212 330 nF, +80-20 %, 10 V, Y5 V, TP, 1005
SAMSUNG Proprietary-Contents may change without notice
2-1
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
38 2203-005061 C213 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
39 2203-005061 C214 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
40 2203-005061 C280 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
41 2203-000233 C300 0.1 nF, 5 %, 50 V, NP0, TP, 1005
42 2203-000233 C301 0.1 nF, 5 %, 50 V, NP0, TP, 1005
43 2203-005053 C302 0.0039 nF, 0.25 pF, 50 V, NP0, TP, 1005
44 2203-005053 C303 0.0039 nF, 0.25 pF, 50 V, NP0, TP, 1005
45 2203-005446 C304 0.0027 nF, 0.1 pF, 50 V, NP0, TP, 1005
46 2404-001234 C305 68uF, 20 %, 6.3 V, -, TP, 3.3 x 2.7 x 1.7 mm
47 2203-000628 C307 0.022 nF, 5 %, 50 V, NP0, TP, 1005
48 2203-000438 C308 1 nF, 10 %, 50 V, X7R, TP, 1005, -
49 2203-005053 C309 0.0039 nF, 0.25 pF, 50 V, NP0, TP, 1005
50 2203-000628 C310 0.022 nF, 5 %, 50 V, NP0, TP, 1005
51 2203-000628 C311 0.022 nF, 5 %, 50 V, NP0, TP, 1005
52 2301-001230 C312 10 nF, 5 %, 16 V, TP, 2012, -
53 2404-001105 C313 10UF, 20 %, 6.3 V, GP, TP, 2012
54 2203-000940 C314 470 pF, 10 %, 50 V, X7R, TP, 1005, -
55 2203-000812 C315 0.033 nF, 5 %, 50 V, NP0, TP, 1005
56 2203-000254 C316 10 nF, 10 %, 16 V, X7R, TP, 1005, -
57 2203-000254 C317 10 nF, 10 %, 16 V, X7R, TP, 1005, -
58 2203-000836 C318 390 pF, 10 %, 50 V, X7R, TP, 1005, -
59 2203-005664 C319 4700 nF, 10 %, 6.3 V, X5R, TP, 2012
60 2203-000812 C320 0.033 nF, 5 %, 50 V, NP0, TP, 1005
61 2203-000438 C321 1 nF, 10 %, 50 V, X7R, TP, 1005, -
62 2203-000278 C322 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1005
63 2203-005446 C323 0.0027 nF, 0.1 pF, 50 V, NP0, TP, 1005
64 2203-000278 C324 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1005
65 2203-000425 C326 0.018 nF, 5 %, 50 V, NP0, TP, 1005
66 2203-000425 C327 0.018 nF, 5 %, 50 V, NP0, TP, 1005
67 2203-000940 C329 470 pF, 10 %, 50 V, X7R, TP, 1005, -
68 2203-000330 C330 0.012 nF, 5 %, 50 V, NP0, TP, 1005
69 2203-000836 C331 390 pF, 10 %, 50 V, X7R, TP, 1005, -
SAMSUNG Proprietary-Contents may change without notice
2-2
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
70 2203-005481 C332 47 nF, 10 %, 10 V, X7R, TP, 1005, -
71 2203-005664 C333 4700 nF, 10 %, 6.3 V, X5R, TP, 2012
72 2203-000386 C334 0.015 nF, 5 %, 50 V, NP0, TP, 1005
73 2203-000812 C335 0.033 nF, 5 %, 50 V, NP0, TP, 1005
74 2301-001230 C336 10 nF, 5 %, 16 V, TP, 2012, -
75 2203-005158 C337 0.0022 nF, 0.25 pF, 50 V, NP0, TP, 1005
76 2203-005158 C338 0.0022 nF, 0.25 pF, 50 V, NP0, TP, 1005
77 2203-000812 C339 0.033 nF, 5 %, 50 V, NP0, TP, 1005
78 2203-000812 C340 0.033 nF, 5 %, 50 V, NP0, TP, 1005
79 2203-002443 C341 0.33 nF, 10 %, 50 V, X7R, TP, 1005
80 2203-002443 C342 0.33 nF, 10 %, 50 V, X7R, TP, 1005
81 2203-002443 C343 0.33 nF, 10 %, 50 V, X7R, TP, 1005
82 2203-002443 C344 0.33 nF, 10 %, 50 V, X7R, TP, 1005
83 2203-000254 C345 10 nF, 10 %, 16 V, X7R, TP, 1005, -
84 2203-000254 C346 10 nF, 10 %, 16 V, X7R, TP, 1005, -
85 2203-000233 C401 0.1 nF, 5 %, 50 V, NP0, TP, 1005
86 2203-005061 C402 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
87 2203-005065 C403 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
88 2203-005065 C404 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
89 2203-005664 C405 4700 nF, 10 %, 6.3 V, X5R, TP, 2012
90 2203-005664 C406 4700 nF, 10 %, 6.3 V, X5R, TP, 2012
91 2203-000254 C407 10 nF, 10 %, 16 V, X7R, TP, 1005, -
92 2203-005065 C408 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
93 2203-000995 C409 0.047 nF, 5 %, 50 V, NP0, TP, 1005
94 2203-000359 C410 0.15 nF, 5 %, 50 V, NP0, TP, 1005
95 2203-000359 C411 0.15 nF, 5 %, 50 V, NP0, TP, 1005
96 2203-000254 C412 10 nF, 10 %, 16 V, X7R, TP, 1005, -
97 2203-005065 C413 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
98 2203-000233 C414 0.1 nF, 5 %, 50 V, NP0, TP, 1005
99 2404-001155 C415 100 uF, 10 %, 6.3 V, LZ, TP, 4427
100 2203-005562 C416 10000 nF, +80-20 %, 10 V, Y5 V, TP, 3216
101 2203-005061 C417 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
SAMSUNG Proprietary-Contents may change without notice
2-3
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
102 2203-000940 C418 470 pF, 10 %, 50 V, X7R, TP, 1005, -
103 2203-000254 C419 10 nF, 10 %, 16 V, X7R, TP, 1005, -
104 2404-001086 C420 4.7uF, 20 %, 6.3 V, GP, TP, 2012, -
105 2203-000233 C500 0.1 nF, 5 %, 50 V, NP0, TP, 1005
106 2203-000438 C501 1 nF, 10 %, 50 V, X7R, TP, 1005, -
107 2203-000812 C503 0.033 nF, 5 %, 50 V, NP0, TP, 1005
108 2203-000233 C504 0.1 nF, 5 %, 50 V, NP0, TP, 1005
109 2203-000233 C505 0.1 nF, 5 %, 50 V, NP0, TP, 1005
110 2203-000278 C506 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1005
111 2203-005056 C507 0.0068 nF, 0.25 pF, 50 V, NP0, TP, 1005
112 2203-000233 C508 0.1 nF, 5 %, 50 V, NP0, TP, 1005
113 2203-000233 C509 0.1 nF, 5 %, 50 V, NP0, TP, 1005
114 2203-005234 C511 0.0012 nF, 0.25 pF, 50 V, NP0, TP, 1005
115 2203-000628 C512 0.022 nF, 5 %, 50 V, NP0, TP, 1005
116 2203-000628 C513 0.022 nF, 5 %, 50 V, NP0, TP, 1005
117 2203-001385 C514 0.0015 nF, 0.25 pF, 50 V, NP0, TP, 1005
118 2203-000278 C515 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1005
119 2203-000628 C516 0.022 nF, 5 %, 50 V, NP0, TP, 1005
120 2203-000628 C517 0.022 nF, 5 %, 50 V, NP0, TP, 1005
121 2203-000812 C518 0.033 nF, 5 %, 50 V, NP0, TP, 1005
122 2203-000812 C519 0.033 nF, 5 %, 50 V, NP0, TP, 1005
123 2203-000278 C520 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1005
124 2404-001155 C521 100 uF, 10 %, 6.3 V, LZ, TP, 4427
125 2203-005148 C522 100 nF, 10 %, 16 V, X7R, TP, 1608, -
126 2203-005509 C524 330 nF, +80-20 %, 10 V, Y5 V, TP, 1005
127 2203-000628 C525 0.022 nF, 5 %, 50 V, NP0, TP, 1005
128 2203-000233 C526 0.1 nF, 5 %, 50 V, NP0, TP, 1005
129 2203-000812 C527 0.033 nF, 5 %, 50 V, NP0, TP, 1005
130 2203-000254 C528 10 nF, 10 %, 16 V, X7R, TP, 1005, -
131 2203-000233 C530 0.1 nF, 5 %, 50 V, NP0, TP, 1005
132 2203-000233 C532 0.1 nF, 5 %, 50 V, NP0, TP, 1005
133 2203-000812 C533 0.033 nF, 5 %, 50 V, NP0, TP, 1005
SAMSUNG Proprietary-Contents may change without notice
2-4
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
134 2203-005061 C534 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
135 2203-000278 C535 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1005
136 2203-000628 C537 0.022 nF, 5 %, 50 V, NP0, TP, 1005
137 2203-000438 C538 1 nF, 10 %, 50 V, X7R, TP, 1005, -
138 2203-000812 C539 0.033 nF, 5 %, 50 V, NP0, TP, 1005
139 2203-000696 C540 0.002 nF, 0.25 pF, 50 V, NP0, TP, 1005
140 2203-000466 C541 0.001 nF, 0.25 pF, 50 V, NP0, TP, 1005
141 2203-000679 C542 0.027 nF, 5 %, 50 V, NP0, TP, 1005
142 2203-000233 C543 0.1 nF, 5 %, 50 V, NP0, TP, 1005
143 2301-001475 C544 3.9 nF, 5 %, 16 V, TP, 2.0 x 1.25 x 0.9 mm, -
144 2203-000995 C545 0.047 nF, 5 %, 50 V, NP0, TP, 1005
145 2203-000628 C546 0.022 nF, 5 %, 50 V, NP0, TP, 1005
146 2203-000278 C547 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1005
147 2203-001432 C548 47 nF, +80-20 %, 16 V, Y5 V, TP, 1005
148 2203-005065 C549 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
149 2203-000812 C600 0.033 nF, 5 %, 50 V, NP0, TP, 1005
150 2203-000628 C601 0.022 nF, 5 %, 50 V, NP0, TP, 1005
151 2404-001151 C602 33UF, 20 %, 6.3 V, LZ, TP, 3216
152 2203-000438 C604 1 nF, 10 %, 50 V, X7R, TP, 1005, -
153 2203-000628 C605 0.022 nF, 5 %, 50 V, NP0, TP, 1005
154 2203-005367 C606 6800 nF, +80-20 %, 25 V, Y5 V, TP, 3225
155 2203-000812 C608 0.033 nF, 5 %, 50 V, NP0, TP, 1005
156 2203-000812 C609 0.033 nF, 5 %, 50 V, NP0, TP, 1005
157 2203-000812 C611 0.033 nF, 5 %, 50 V, NP0, TP, 1005
158 2404-001151 C613 33 uF, 20 %, 6.3 V, LZ, TP, 3216
159 2203-000812 C614 0.033 nF, 5 %, 50 V, NP0, TP, 1005
160 2203-005065 C615 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
161 2203-000812 C616 0.033 nF, 5 %, 50 V, NP0, TP, 1005
162 2203-005061 C617 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
163 2203-005061 C618 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
164 2203-000628 C620 0.022 nF, 5 %, 50 V, NP0, TP, 1005
165 2203-005065 C621 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
SAMSUNG Proprietary-Contents may change without notice
2-5
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
166 2203-005065 C622 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
167 2203-000628 C625 0.022 nF, 5 %, 50 V, NP0, TP, 1005
168 2404-001155 C627 100UF, 10 %, 6.3 V, LZ, TP, 4427
169 2203-005065 C630 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
170 2203-001412 C631 0.03 nF, 5 %, 50 V, NP0, TP, 1005
171 2203-005061 C632 100 nF, +80-20 %, 16 V, Y5 V, TP, 1005
172 2203-001412 C633 0.03 nF, 5 %, 50 V, NP0, TP, 1005
173 2404-001020 C634 10 uF, 20 %, 10 V, GP, TP, 3216, 3.2
174 2404-001020 C635 10 uF, 20 %, 10 V, GP, TP, 3216, 3.2
175 2203-000812 C636 0.033 nF, 5 %, 50 V, NP0, TP, 1005
176 2203-000812 C637 0.033 nF, 5 %, 50 V, NP0, TP, 1005
177 2203-000812 C638 0.033 nF, 5 %, 50 V, NP0, TP, 1005
178 2203-000812 C639 0.033 nF, 5 %, 50 V, NP0, TP, 1005
179 2203-000812 C640 0.033 nF, 5 %, 50 V, NP0, TP, 1005
180 2203-000812 C641 0.033 nF, 5 %, 50 V, NP0, TP, 1005
181 2203-000812 C642 0.033 nF, 5 %, 50 V, NP0, TP, 1005
182 2203-000812 C643 0.033 nF, 5 %, 50 V, NP0, TP, 1005
183 2203-000812 C644 0.033 nF, 5 %, 50 V, NP0, TP, 1005
184 2203-000812 C647 0.033 nF, 5 %, 50 V, NP0, TP, 1005
185 2203-005065 C651 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1608
186 2203-000359 C652 0.15 nF, 5 %, 50 V, NP0, TP, 1005
187 2203-000812 C657 0.033 nF, 5 %, 50 V, NP0, TP, 1005
188 2203-000386 C658 0.015 nF, 5 %, 50 V, NP0, TP, 1005
189 2203-000386 C659 0.015 nF, 5 %, 50 V, NP0, TP, 1005
190 3709-001190 CN400 6P, 2.54 mm, SMD, -
191 3705-001178 CN500 SMC, JACK, 100M ohm, 50 ohm, .5DB
192 3722-001530 CN600 5P, 2.6PI, AUF, BLK, -
193 3711-004623 CN601 BOX, 20P, 2R, 0.5mm, SMD-S, AUF
194 3711-004623 CN602 BOX, 20P, 2R, 0.5mm, SMD-S, AUF
195 3710-001653 CN603 18P, 1R, 0.5mm, SMD-A, AUF
196 3711-004814 CN604 -, 2P, -, 2.5 mm, STRAGHIT, AU0.1U, BLK
197 3711-004814 CN605 -, 2P, -, 2.5 mm, STRAGHIT, AU0.1U, BLK
SAMSUNG Proprietary-Contents may change without notice
2-6
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
198 0407-000115 D200 DAN202U, 80 V, 100 mA, CA2-3, SC-70,
199 0401-001033 D201 MCL4154, 25 V, 200 mA, M-MELF, TP
200 0405-001093 D300 MA4ST230, 12 V, -, SOT-23, TP
201 0401-001033 D402 MCL4154, 25 V, 200 mA, M-MELF, TP
202 0402-001463 D500 HSMS-2825, 15 V, 1A, SOT-143, TP
203 0407-000115 D601 DAN202U, 80 V, 100 mA, CA2-3, SC-70,
204 2903-001211 F300 BP, 14.6 MHz, 300KHz, 6dB, 1dB, TP, -
205 2904-001165 F301 400 MHZ, .28 MHZ, +-70KHZ, TP, 6.5DB, -
206 2904-001096 F500 1.8425GHz, 75 MHz, +-37.5 MHz/2.5dB
207 2904-001281 F501 947.5 MHz, 25 MHz, +-12.5 MHz/1.4dB
208 2703-000310 L100 1.8 uH, 10 %, 0.8 x 1.6 x 0.8 mm
209 2703-001543 L300 33 nH, 5 %, 1.8 x 1.12 x 1.02 mm
210 2703-001513 L301 100 nH, 5 %, 1.8 x 1.12 x 1.02 mm
211 2703-002214 L302 8.2 nH, 5 %, 1.6 x 0.8 x 0.8 mm
212 2703-001513 L303 100 nH, 5 %, 1.8 x 1.12 x 1.02 mm
213 2703-001545 L304 47 nH, 5 %, 1.8 x 1.12 x 1.02 mm
214 2703-001543 L305 33 nH, 5 %, 1.8 x 1.12 x 1.02 mm
215 2703-001547 L306 10 nH, 5 %, 1.8 x 1.12 x 1.02 mm
216 2703-001547 L307 10 nH, 5 %, 1.8 x 1.12 x 1.02 mm
217 2703-001547 L308 10 nH, 5 %, 1.8 x 1.12 x 1.02 mm
218 2703-002218 L400 100 uH, 20 %, 3.3 x 1.5 x 0.8 mm
219 2703-001954 L501 2.7 nH, 0.3 nH, 1.0 x 0.5 x 0.5mm
220 2703-002213 L502 3.3 nH, 5 %, 1.6 x 0.8 x 0.8 mm
221 2703-002212 L503 1.6 nH, 5 %, 1.6 x 0.8 x 0.8 mm
222 2703-001425 L504 68 nH, 5 %, 1.6 x 0.8 x 0.8 mm
223 2703-002213 L505 3.3 nH, 5 %, 1.6 x 0.8 x 0.8 mm
224 2703-001547 L506 10 nH, 5 %, 1.8 x 1.12 x 1.02 mm
225 2703-001425 L507 68 nH, 5 %, 1.6 x 0.8 x 0.8 mm
226 2703-000175 L600 270 nH, 10 %, 0.8 x 1.6 x 0.8 mm
227 3301-001208 L602 AB, 1.6 x 0.8 x 0.8 mm, -, -
228 2703-001297 L603 10 nH, 10 %, 1.6 x 0.8 x 0.8 mm
229 4709-001144 LAM1 897.5/1747.5 MHZ, 19DB/14DB
SAMSUNG Proprietary-Contents may change without notice
2-7
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
230 0604-001146 LED600 -, 875NM, 500 mW, 30DEG, TP
231 2801-003695 OSC100 19.5 MHz, 10ppm, 28-ABK, 10.2 pF, 20
232 2801-004025 OSC200 0.032768 MHz, 20 ppm, 28-ABK, 1.7fF, 65 kohm, TP
233 2806-001191 OSC300 1258-1360 MHZ, -, 50 ohm, TP, 2.7 V, 20 mA
234 0501-000162 Q200 2SA1576, PNP, 200 mW, SOT-323, TP, 180-390
235 0504-000167 Q201 RN1102, NPN, 100 mW, 10K/10K, SSM, TP
236 0504-001012 Q202 DTC114YE, NPN, 150 mW, 10K/47K, EMT3, TP
237 0504-001012 Q203 DTC114YE, NPN, 150 mW, 10K/47K, EMT3, TP
238 0501-002356 Q204 -, NPN, 250 mW, SOT-323, TP, 250-630
239 0501-002357 Q400 ZUMT619, NPN, 500 mW, SOT-323, TP, 200-
240 0501-002202 Q401 MMBT2222AWT1, NPN, 150 mW, SOT-323
241 0504-001012 Q500 DTC114YE, NPN, 150 mW, 10K/47K, EMT3, TP
242 0504-001012 Q501 DTC114YE, NPN, 150 mW, 10K/47K, EMT3, TP
243 0504-000168 Q600 RN1104, NPN, 100 mW, 47K/47K, SSM, TP
244 0501-002346 Q601 2SB1427, PNP, 500 mW, SOT-89, TP, 390-820
245 0501-002356 Q603 -, NPN, 250 mW, SOT-323, TP, 250-630
246 0506-001052 Q604 UMH9N, NPN, 2, 150 mW, SC-88, TP, 68-
247 0504-001012 Q605 DTC114YE, NPN, 150 mW, 10K/47K, EMT3, TP
248 2007-000140 R100 1 kohm, 5 %, 1/16 W, DA, TP, 1005
249 2007-000140 R101 1 kohm, 5 %, 1/16 W, DA, TP, 1005
250 2007-007771 R102 0 ohm, 5 %, 1/16 W, DA, TP, 1005
251 2007-001313 R103 330 ohm, 5 %, 1/16 W, DA, TP, 1005
252 2007-007092 R104 1.1 kohm, 5 %, 1/16 W, DA, TP, 1005
253 2007-000775 R105 33 kohm, 5 %, 1/16 W, DA, TP, 1005
254 2007-007468 R106 121 kohm, 1 %, 1/16 W, DA, TP, 1005
255 2007-007092 R107 1.1 kohm, 5 %, 1/16 W, DA, TP, 1005
256 2007-000140 R200 1 kohm, 5 %, 1/16 W, DA, TP, 1005
257 2007-000148 R203 10 kohm, 5 %, 1/16 W, DA, TP, 1005
258 2007-000148 R204 10 kohm, 5 %, 1/16 W, DA, TP, 1005
259 2007-000148 R205 10 kohm, 5 %, 1/16 W, DA, TP, 1005
260 2007-000148 R206 10 kohm, 5 %, 1/16 W, DA, TP, 1005
261 2007-000137 R207 2 kohm, 5 %, 1/16 W, DA, TP, 1005
SAMSUNG Proprietary-Contents may change without notice
2-8
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
262 2007-000148 R209 10 kohm, 5 %, 1/16 W, DA, TP, 1005
263 2007-000148 R211 10 kohm, 5 %, 1/16 W, DA, TP, 1005
264 2007-000148 R212 10 kohm, 5 %, 1/16 W, DA, TP, 1005
265 2007-000148 R213 10 kohm, 5 %, 1/16 W, DA, TP, 1005
266 2007-000148 R214 10 kohm, 5 %, 1/16 W, DA, TP, 1005
267 2007-000148 R215 10 kohm, 5 %, 1/16 W, DA, TP, 1005
268 2007-000138 R216 100 ohm, 5 %, 1/16 W, DA, TP, 1005
269 2007-007771 R217 0 ohm, 5 %, 1/16 W, DA, TP, 1005
270 2007-000170 R218 1 Mohm, 5 %, 1/16 W, DA, TP, 1005
271 2007-001313 R219 330 ohm, 5 %, 1/16 W, DA, TP, 1005
272 2007-001313 R220 330 ohm, 5 %, 1/16 W, DA, TP, 1005
273 2007-007193 R223 5.1 ohm, 5 %, 1/16 W, DA, TP, 1005
274 2007-000932 R228 470 ohm, 5 %, 1/16 W, DA, TP, 1005
275 2007-007771 R280 0 ohm, 5 %, 1/16 W, DA, TP, 1005
276 2007-000932 R281 470 ohm, 5 %, 1/16 W, DA, TP, 1005
277 2007-001288 R300 18 ohm, 5 %, 1/16 W, DA, TP, 1005
278 2007-001288 R301 18 ohm, 5 %, 1/16 W, DA, TP, 1005
279 2007-001323 R302 3 kohm, 5 %, 1/16 W, DA, TP, 1005
280 2007-000172 R303 10 ohm, 5 %, 1/16 W, DA, TP, 1005
281 2007-000172 R304 10 ohm, 5 %, 1/16 W, DA, TP, 1005
282 2007-001288 R305 18 ohm, 5 %, 1/16 W, DA, TP, 1005
283 2007-001323 R306 3 kohm, 5 %, 1/16 W, DA, TP, 1005
284 2007-008213 R307 4.3 kohm, 1 %, 1/16 W, DA, TP, 1005
285 2007-007001 R308 3.9 kohm, 5 %, 1/16 W, DA, TP, 1005
286 2007-002965 R309 15 ohm, 5 %, 1/16 W, DA, TP, 1005
287 2007-001298 R310 51 ohm, 5 %, 1/16 W, DA, TP, 1005
288 3301-001342 R311 AB, 1.5 kohm, 1 x 0.5 x 0.5 mm, 100 mA, TP, M, 1.4ohm
289 2007-000146 R312 6.8 kohm, 5 %, 1/16 W, DA, TP, 1005
290 2007-000138 R313 100 ohm, 5 %, 1/16 W, DA, TP, 1005
291 2007-007136 R314 4.7 kohm, 1 %, 1/16 W, DA, TP, 1005
292 3301-001342 R315 AB, 1.5 kohm, 1 x 0.5 x 0.5 mm, 100 mA, TP, M, 1.4ohm
293 2007-001298 R316 51 ohm, 5 %, 1/16 W, DA, TP, 1005
SAMSUNG Proprietary-Contents may change without notice
2-9
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
294 2007-002965 R317 15 ohm, 5 %, 1/16 W, DA, TP, 1005
295 3301-001342 R318 AB, 1.5 kohm, 1 x 0.5 x 0.5 mm, 100 mA, TP, M, 1.4ohm
296 2007-007771 R403 0 ohm, 5 %, 1/16 W, DA, TP, 1005
297 2007-000162 R404 100 kohm, 5 %, 1/16 W, DA, TP, 1005
298 2007-000143 R407 4.7 kohm, 5 %, 1/16 W, DA, TP, 1005
299 2007-000143 R409 4.7 kohm, 5 %, 1/16 W, DA, TP, 1005
300 2007-000138 R410 100 ohm, 5 %, 1/16 W, DA, TP, 1005
301 2007-007156 R411 1 ohm, 5 %, 1/16 W, DA, TP, 1005
302 2007-000138 R412 100 ohm, 5 %, 1/16 W, DA, TP, 1005
303 2007-000141 R413 2.2 kohm, 5 %, 1/16 W, DA, TP, 1005
304 2007-000157 R414 47 kohm, 5 %, 1/16 W, DA, TP, 1005
305 2007-000140 R500 1 kohm, 5 %, 1/16 W, DA, TP, 1005
306 2007-000070 R501 0 ohm, 5 %, 1/16 W, DA, TP, 1608
307 2007-000140 R502 1 kohm, 5 %, 1/16 W, DA, TP, 1005
308 2007-000148 R503 10 kohm, 5 %, 1/16 W, DA, TP, 1005
309 2007-000148 R505 10 kohm, 5 %, 1/16 W, DA, TP, 1005
310 2007-001298 R506 51 ohm, 5 %, 1/16 W, DA, TP, 1005
311 2007-007193 R507 5.1 ohm, 5 %, 1/16 W, DA, TP, 1005
312 2007-001298 R508 51 ohm, 5 %, 1/16 W, DA, TP, 1005
313 2007-007193 R509 5.1 ohm, 5 %, 1/16 W, DA, TP, 1005
314 2007-000148 R510 10 kohm, 5 %, 1/16 W, DA, TP, 1005
315 2007-000137 R511 2 kohm, 5 %, 1/16 W, DA, TP, 1005
316 2007-007142 R512 10 kohm, 1 %, 1/16 W, DA, TP, 1005
317 2007-007312 R513 20 kohm, 1 %, 1/16 W, DA, TP, 1005
318 2007-001308 R514 200 ohm, 5 %, 1/16 W, DA, TP, 1005
319 2007-007142 R515 10 kohm, 1 %, 1/16 W, DA, TP, 1005
320 2007-007142 R516 10 kohm, 1 %, 1/16 W, DA, TP, 1005
321 2007-007142 R517 10 kohm, 1 %, 1/16 W, DA, TP, 1005
322 2007-001305 R518 120 ohm, 5 %, 1/16 W, DA, TP, 1005
323 2007-007142 R519 10 kohm, 1 %, 1/16 W, DA, TP, 1005
324 2007-007142 R520 10 kohm, 1 %, 1/16 W, DA, TP, 1005
325 2007-007142 R521 10 kohm, 1 %, 1/16 W, DA, TP, 1005
SAMSUNG Proprietary-Contents may change without notice
2-10
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
326 2007-000137 R522 2 kohm, 5 %, 1/16 W, DA, TP, 1005
327 2007-001306 R523 150 ohm, 5 %, 1/16 W, DA, TP, 1005
328 2007-001308 R524 200 ohm, 5 %, 1/16 W, DA, TP, 1005
329 2007-000170 R525 1M ohm, 5 %, 1/16 W, DA, TP, 1005
330 2007-007771 R526 0 ohm, 5 %, 1/16 W, DA, TP, 1005
331 2007-007095 R527 390 ohm, 5 %, 1/16 W, DA, TP, 1005
332 2007-000139 R528 220 ohm, 5 %, 1/16 W, DA, TP, 1005
333 2007-000140 R529 1 kohm, 5 %, 1/16 W, DA, TP, 1005
334 2007-000148 R530 10 kohm, 5 %, 1/16 W, DA, TP, 1005
335 2007-000145 R531 6.2 kohm, 5 %, 1/16 W, DA, TP, 1005
336 2007-008263 R532 3 kohm, 1 %, 2 W, -, TP, 1005
337 2007-000140 R601 1 kohm, 5 %, 1/16 W, DA, TP, 1005
338 2007-001301 R604 68 ohm, 5 %, 1/16 W, DA, TP, 1005
339 2007-000142 R605 2.7 kohm, 5 %, 1/16 W, DA, TP, 1005
340 2007-000165 R607 200 kohm, 5 %, 1/16 W, DA, TP, 1005
341 2007-000162 R609 100 kohm, 5 %, 1/16 W, DA, TP, 1005
342 2007-000148 R610 10 kohm, 5 %, 1/16 W, DA, TP, 1005
343 2007-000142 R611 2.7 kohm, 5 %, 1/16 W, DA, TP, 1005
344 2007-000162 R612 100 kohm, 5 %, 1/16 W, DA, TP, 1005
345 2007-000140 R613 1 kohm, 5 %, 1/16 W, DA, TP, 1005
346 2007-000140 R616 1 kohm, 5 %, 1/16 W, DA, TP, 1005
347 2007-000154 R619 24 kohm, 5 %, 1/16 W, DA, TP, 1005
348 2007-001119 R620 680 ohm, 5 %, 1/16 W, DA, TP, 1005
349 2007-000165 R621 200 kohm, 5 %, 1/16 W, DA, TP, 1005
350 2007-007771 R634 0 ohm, 5 %, 1/16 W, DA, TP, 1005
351 2007-001306 R635 150 ohm, 5 %, 1/16 W, DA, TP, 1005
352 2007-007316 R637 3.3 kohm, 1 %, 1/16 W, DA, TP, 1005
353 2007-000140 R638 1 kohm, 5 %, 1/16 W, DA, TP, 1005
354 2007-000140 R639 1 kohm, 5 %, 1/16 W, DA, TP, 1005
355 2007-000140 R640 1 kohm, 5 %, 1/16 W, DA, TP, 1005
356 2007-000162 R641 100 kohm, 5 %, 1/16 W, DA, TP, 1005
357 2007-000140 R642 1 kohm, 5 %, 1/16 W, DA, TP, 1005
SAMSUNG Proprietary-Contents may change without notice
2-11
Electrical Parts List
Level SEC CODE REFERENCE DESCRIPTIONS Remark
358 2007-007592 R643 270 kohm, 1 %, 1/16 W, DA, TP, 1005
359 2007-007875 R644 160 kohm, 1 %, 1/16 W, DA, TP, 1005
360 2007-000153 R646 22 kohm, 5 %, 1/16 W, DA, TP, 1005
361 2007-000148 R648 10 kohm, 5 %, 1/16 W, DA, TP, 1005
362 2007-000070 R649 0 ohm, 5 %, 1/16 W, DA, TP, 1608
363 2007-007771 R650 0 ohm, 5 %, 1/16 W, DA, TP, 1005
364 2007-007771 R651 0 ohm, 5 %, 1/16 W, DA, TP, 1005
365 1205-001708 U100 20420, BGA, 100P, -, PLASTIC
366 0902-001231 U201 46, 16BIT, BGA, 180P, -, 32.768 MHZ
367 1203-001592 U202 1015, SOT-23A-5, 5P, 59MIL, PLASTI
368 1205-001647 U300 RF137, TQFP, 48P, 275MIL
369 1203-001703 U400 20436, TQFP, 48P, 275MIL, PLASTIC, 2.8V
370 1203-002099 U401 5245, SOT-23-5, 5P, 64MIL
371 0504-001042 U500 BCR10PN, NPN/PNP, 250 mW, 10K/10K,
372 0504-001042 U501 BCR10PN, NPN/PNP, 250 mW, 10K/10K,
373 0504-001042 U502 BCR10PN, NPN/PNP, 250 mW, 10K/10K,
374 0504-001012 U503 DTC114YE, NPN, 150 mW, 10K/47K, EMT3, TP
375 2909-001084 U505 942.5 MHZ, 897.5 MHZ, 1/1.2DB, TP, -, -
376 2007-000137 U506 2 kohm, 5 %, 1/16 W, DA, TP, 1005
377 1201-001697 U507 RF210-51, TSSOP, 20P, 173MIL
378 1201-001753 U508 MSOP, TP, 8P, 118MIL, DUAL
379 0504-001042 U509 BCR10PN, NPN/PNP, 250 mW, 10K/10K,
380 1201-001754 U510 MCM, 16P, -, -, -, PLASTIC, 7V
381 1209-001219 U511 LM60C, SOT-23, 3P, 115MIL, PLASTIC
382 0801-002640 U512 7WZ00, 2-INPUT NAND GATE, US8, 8P
383 2806-001192 U513 902.5/1747.5 MHz, -, -, TP, 2.7 V, 50 mA
384 1106-001301 U514 1337, 262K x 16Bit, CSP, 72P
385 1103-001147 U515 24256, 256KBIT, SOP, 8P, 150MIL
386 0506-001052 U600 UMH9N, NPN, 2, 150 mW, SC-88, TP, 68-
387 1201-001462 U602 4864, MSOP, 8P, 118MIL-
388 0504-001071 U603 UMD9N, NPN/PNP, 150 mW, 4.7, UMT6, TP
389 1203-002127 U605 1734, SOT-23, 6P, 150MIL
SAMSUNG Proprietary-Contents may change without notice
2-12
Electrical Parts List
Level SEC CODE Design LOC DESCRIPTIONS Remark
390 0801-002641 U8016 7WZ08, 2-INPUT AND GATE, US8, 8P
391 0506-001052 U8021 UMH9N, NPN, 2, 150 mW, SC-88, TP, 68-
392 0406-001104 U8022 ESDA6V1-5W6, 6.1/-/7.2 V, 100 W, SOT-323-6L
393 1405-001082 V600 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
394 1405-001082 V601 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
395 1405-001082 V605 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
396 1405-001082 V615 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
397 1405-001082 V616 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
398 1405-001082 V617 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
399 1405-001082 V618 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
400 1405-001082 V619 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
401 1405-001082 V620 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
402 1405-001082 V621 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
403 1405-001082 V622 5.6 V, 20A, 1 x 0.5 x 0.6 mm, TP
404 0404-001044 ZD400 UPS5817, 20 V, 1A, SMD, TP
405 0404-000108 ZD401 RB705D, 20 V, 30 mA, SOT-23, TP
406 0404-000108 ZD402 RB705D, 20 V, 30 mA, SOT-23, TP
407 0406-001104 ZD602 ESDA6V1-5W6, 6.1/-/7.2 V, 100 W, SOT-323-6L
408 0406-001104 ZD603 ESDA6V1-5W6, 6.1/-/7.2 V, 100 W, SOT-323-6L
409 0406-001104 ZD604 ESDA6V1-5W6, 6.1/-/7.2 V, 100 W, SOT-323-6L
410 0406-001104 ZD605 ESDA6V1-5W6, 6.1/-/7.2 V, 100 W, SOT-323-6L
SAMSUNG Proprietary-Contents may change without notice
2-13
3. SGH-A300 Block Diagrams
3-1 SGH-A300 Main Block Diagram
SAMSUNG Proprietary-Contents may change without notice
3-1
Block Diagrams
3-2 SGH-A300 Main RF Block Diagram
SAMSUNG Proprietary-Contents may change without notice
3-2
Block Diagrams
3-2-1 SGH-A300 RF Receive Part Block Diagram
SAMSUNG Proprietary-Contents may change without notice
3-3
Block Diagrams
3-2-2 SGH-A300 RF Transmit Part Block Diagram
SAMSUNG Proprietary-Contents may change without notice
3-4
4. SGH-A300 PCB Diagrams
4-1 SGH-A300 Main PCB Top Diagram
SAMSUNG Proprietary-Contents may change without notice
4-1
PCB diagrams
4-2 SGH-A300 Main PCB Bottom Diagram
SAMSUNG Proprietary-Contents may change without notice
4-2
5.Flow Chart of Troubleshooting and Circuit Diagram
5-1 SGH-A300 Power ON
`POWER ON' does not work
Y
Check the current
consumption more than N Download again
100 mA
Y
Check the
Battery Voltage more N Charge the Battery
than 3.3V
Y
Check the pin Check to the path from CN604 to pin
38 of U400 is more than N
38 of U400 and keypad
3.2 V
Y
U400 pin 33,28,30 Change U400
N
= 2.8V
Y
Check the clock signal Check the clock generation circuit
N
at R105 (related to U400 and OSC100)
Y
Check the initial operation
Y
END
SAMSUNG Proprietary-Contents may change without notice
5-1
Flow Chart of Troubleshooting and Circuit Diagram
5-2 SGH-A300 Initial
Initial Failure
Y
Check the "Reset_B"
signal at the pin 6 of N Check the U100 (IA)
U8016 is "High"
Y
Check the pin 10
N Check the U201 (M46)
of U400 is "High"
Y
Check the pin 11 of U400 Check the U400 (PMIC)
N
is "High"
Y
Check the connections and
initialization using Factory
Test Program
Y
Check LCD connector CN601,
and resolder bridge
Y
END
SAMSUNG Proprietary-Contents may change without notice
5-2
Flow Chart of Troubleshooting and Circuit Diagram
5-3 SGH-A300 Sim Part
Phone can't access SIM card
Y
Check the pin 1, 5 of
N Check the SIM related circuit of the U400
CN400. voltage is 2.8V ?
Y
Check the SIM
connector's CN400 N Resolder CN400
Connection to
SIM card
Y
Check the circuit around U515
(Serial EEPROM) and data stored in it
Y
END
VBAT
VCCD VCCD
C410
150PF
R409 R407
4.7K 4.7K
44 20 49 50 51 52 ISENP ISENN
VSUB_P
GND4
GND5
GND6
GND7
VREF_CAP
35
S_Dat
NC1
23 36
S_Clk
GND1 NC2
37
PMIC_RESET
VBAT1 VCCD
38
VBAT2
4
45
NC3 8
POWER_KEY
46
47
ALARM_IN U400 GND3
5 1 VSIM
DTR_IN 7 U8016-1
12 CN400
GND2
6
ENABLE_1 RESET_B
2 2 1 1 4 4
7 2 2 5 5
ENABLE_2
8 9 3 3 6 6
ENABLE_3 PMIC_INTERRUPT 4 G G G G
11 POWER_ON_RESET
RSS_DATA 1 7 8 9 10
10 CLOCK_REQUEST
SIM_DATA_CARD
BOOST_ENABLE
3
SIM_CLK_CARD
SIM_RST_CARD
16 SIM_DATA_M46
BOOST_PULSE