BLUETOOTH TROUBLESHOOTING CHART.
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Phoenix
local mode: Tx data 1 ch. 39 (2441 MHz approx. 1 MHz BW). BC02 Bluetooth control. Options: Internal
gain = 52 Spectrum analyzer: RBW =
500 kHz, VBW = 500 kHz, center = 942 Mhz and span = 20 Mhz
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Measure
PURX voltage = 1.8 V (N131)
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No
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BB
troubleshooting
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Ok
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Measure
N130 BT supply voltage = 2.8V (C144).
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No
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Replace
N131
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Ok
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Measure
N130 VDD-ANA voltage regulator output = 1.8V (C140)
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No
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Replace
N130
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Ok
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Measure a) N130
VDD_VCO supply voltage = 1.8V (C137)
b) VDD_MEM supply
voltage = 1.8V
c)
Rx/Tx supply voltage = 1.8V (C130)
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No
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Check L133, R132
and
L130
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Ok
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Measure
SYSCLK voltage = 550 mVpp (26 MHz) 1.3 VDC (C133).
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No
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Measure D130
supply voltage = 2,8V
at
D130 pin 5
Not OK
Check L131, L132.
If passive components-
OK,
replace D130.
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Ok
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Measure RF level
= -15 dBm at a TX_A (C131)
and
b) TX_B (C132).
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No
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Check L131, L132.
If passive components
OK,
replace N130
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Ok
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Measure
RF level = -18 dBm at Z131 SAW filter input.
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No
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Check
T130 and C130
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Ok
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Measure
RF level = -18 dBm at Z131 SAW filter output
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No
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Replace
Z131
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