![background image](http://html.mh-extra.com/html/samsung/sch-620/sch-620_service-manual_1189708038.webp)
SAMSUNG Proprietary-Contents may change without notice
6-6
Troubleshooting
6-2 Transmitter Section
Abormal
transmitter
section
Check Tx PLL
OK?
Check Tx
Power level.
OK?
Check U404
Out level.
OK?
Check U306
Out level
Check U406
Tx IF level
OK?
Check U406
local Input level
Yes
No
No
CDMA: -15dBm
SPAN 5MHz
Tx VCO:270.76MHz
IF:130.38MHz
CDMA: -8dBm
CDMA: -12dBm
CDMA: +8.63dBm
No
Yes
Yes
No
Yes
969.27MHz
CH:363
Power Level : +10dBm
DC Power Supply : 3.95V
CH:363
Summary of Contents for SCH 620
Page 75: ...9 Block Diagrams SAMSUNG Proprietary Contents may change without notice 9 1 9 1 Main Diagram ...
Page 77: ...SAMSUNG Proprietary Contents may change without notice 9 3 MEMO MEMO ...
Page 79: ...PCB diagrams Samsung Electronics 10 2 10 2 Main PCB Bottom Diagram ...
Page 80: ...PCB diagrams Samsung Electronics 10 3 10 3 CLC PCB Top Diagram 10 4 CLC PCB Bottom Diagram ...
Page 81: ...PCB diagrams Samsung Electronics 10 4 10 5 Hands free Kit PCB Top Diagram ...
Page 84: ...Samsung Electronics 11 3 Circuit diagrams 11 3 CLC Circuit Diagram ...
Page 85: ... Samsung Electronics Co Ltd APRIL 2000 Printed in Korea Code No GH68 00669A BASIC ELECTRONICS ...