Bluetooth Rf Test - LG U990 Service Manual

4. TROUBLE SHOOTING

4.16 Bluetooth RF Test

1. Set phone to bluetooth test-mode.
- Enter Test Mode(3845#*990#) → Module Test Set → BT DUT → BT DUT ON
2. Insert a phone in a TEMSELL (in case of radiation test)
3. Set 'discover' after push menu button of the tester and select the link analyzer .
4. After 'set test mode', confirm the connection state.
5. Measure the power of full channel after hopping mode is selected to 'ON'
6. You can select wanted test cases after getting an optimized power
Set the bluet oot h ON
VREG_BT_2.85V
and
VREG_MSMP_2.7V
is ass erted?
Yes
XTAL_IN
is ass erted?
Yes
CLK_REF
is ass erted?
Yes
SYNC_DET_TX_EN
is ass erted?
Yes
SBST/SBCK/SBDT
is ass erted?
Yes
Bluetoot h is work well?
Yes
END
LGE Internal Use Only
TC-3000A (Bluetooth Tester)
No
Check P MIC
(U501) Pin#64
Check Os ci llator
(X100)
No
An d
Check Buffer
(U102)
No
Check sol deri ng
of BT( M800)
No
Check sol deri ng
of BT( M800)
No Check
TP800/TP801/ P802
No
Change
the main board
- 146 -
TP801 M800 TP800
TP802
BT Antenna
R800
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
BT_GND
BT_ANT