DBTEL DB-6568, Руководство по обслуживанию

Страница: 72 / 73

DBTEL Incorporated
DB-6568 Service Manual Level 1 ~ 3
2003.11.13
DBTEL Copyright Reserved
Page 72 of 66
5.9
Functional Testing and Verification
Generally, maintenance/repair to handset is officially completed if it achieves the factory
performance. Therefore functional testing is necessary for repaired handset, although it is
impossible for normal service/repair technician to carry out all the necessary adjustment and
accurate calibration without precision testing equipment. Procedures listed below are provided
for handset performance verification.
一
. Index test
：
Implement PCB performance index test before reassembling the dismantled housing, which
includes testing for PCB power supply, reception and transmission intermediate frequency,
reception baseband frequency, reception and transmission local oscillation frequency and
other parameter of major power supply.
二
. Handset test
：
Testing for the whole unit to ensure that the handset achieves its best performance.
Verifying sound and voice quality by making or receiving phone call. Check that the vibrator
is functioning properly. Verifying Rubber Key and ringer by pressing keys and listening to
key tone. Checking LCD display to verify that the lens is in position.
三
. Software test
：
Testing for the available menu options, especially handset with FLASH ROM, EEPROM
modified before. Verifying its memory performance by dialing number; ensuring menu options
are functioning well by operating it; checking logical part by charging battery and measuring
battery capacity.