LG HB620 Service Manual

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4. TROUBLE SHOOTING
Bluetooth RF Test procedure
1. Set phone to bluetooth test-mode.
- Enter Test Mode(3845#*620#) → Module Test Set → BT DUT → BT DUT ON
2. Insert a phone in a TEMCELL (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
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Bluetooth works well?
YES
Change the main board
NO
SBST/SBCK?SBDT
is asserted
?
YES
Check Pin#4 / #11 / #12
Check soldering of
BT(M701)
SYNC_DET_TX_EN
is asserted
?
YES
NO
NO
CLK_REF
is asserted
?
YES
Check soldering of
BT(M701
)
NO
XTAL_IN
is asserted
?
YES
Check Oscillator(X101)
and Check Buffer(U103)
Check PMIC
(U401) Pin#64
VREG_BT_2.85V
is asserted
?
YES
NO
NO
Set the Bluetooth
END
TC-3000A (Bluetooth Tester)
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LG HB620 Specifications

General

Brand	LG
Model	HB620
Category	Cell Phone
Language	English