SAMSUNG Proprietary-Contents may change without notice
6-6
Troubleshooting
6-2 Transmitter Section
Abormal
transmitter
section
Check TX
PLL OK?
Check U303
Pin2?
Check
OSC300?
Pin1
Check TX
Power level.
OK?
Check U304
Tx IF Level?
No
Tcxo:19.68 MHz
Gain: -15 dBm
No
YES
No
Yes
Yes
No
Check
U504 Local Input
Level?
CDMA:0 dBm
Gain: 0 dBm
Yes
No
Check Q503
Level?
Gain: + 20 dB
Yes
No
Check U304
Tx IF Level?
Gain: + 28 dB
Yes
969.96 MHz
CH:486
Содержание SCH-A105
Страница 2: ... Samsung Electronics Co Ltd July 2000 Printed in Korea Code No GH68 01246A BASIC ELECTRONICS ...
Страница 58: ...9 Block Diagrams SAMSUNG Proprietary Contents may change without notice 9 1 ...
Страница 59: ...SAMSUNG Proprietary Contents may change without notice 10 1 10 PCB Diagrams 10 1 Main PCB Top View ...
Страница 60: ...SAMSUNG Proprietary Contents may change without notice 10 2 PCB diagrams 10 2 Main PCB Bottom View ...