Nokia RM-57, Руководство по обслуживанию

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Nokia Customer Care Appendix A: RF Troubleshooting
Company Confidential
Copyright © 2005 Nokia. All rights reserved
A-15
2.5 RX PLL phase lock self test (ST_CDSP_RX_PLL_PHASE_LOCK_TEST)
RX_PLL_LOCK_TEST (79) tests the functionality of RX PLL. If this fails, none of the RX related
measurements cannot be trusted.
Tested signals: VBAT_ASIC, VDIG, VR1, VR1RX, VCP1, RFBUSDAT, RFBUSCLK, RFBUSENA, RXRESETX
Error code for this self test is given in format:
• 0xyy, 0xzz
,where 0xyy, 0xzz part is the total error code: 0xyyzz
Hinku PLL not locked
(0x0004)
ST_CDSP_RX_PLL_PHASE_LOCK_TE
ERRORS
YES
NO
Any other code
YES
Propable cause:
Test problem
RFBUS failure (but this should
be ok if we’ve gotten this far)
It’s not possible to
get here …
NO
Is there RF power at VCO
output?
YES
NO
YES
NO
Propable cause:
Poor solder/ Faulty Hinku
Other possible reasons:
VCP line shorted to ground
Propable cause:
Poor solder/Faulty VCO
I e RF power at Hinku
in ut?
s ther
p
YES
NO
Propable cause:
Poor solder/Faulty balun
Is ere ENOUGH RF power
at Hinku input?
th
YES
NO
Is t e Frequency correct ? h
YES
Propable cause:
correct freq and Hinku says it’s
not locked then change Hinku
NO
Is the VCP voltage ok?
YES
NO
Propable cause:
Poor solder/Faulty RETU
Propable cause:
G ugh this and this link
if no help then
change Hinku, if still
not working change VCO
o thro
ST_CDSP_RX_PLL_PHASE_LOCK_TE
ST
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Hinku PLL not locked
(0x0004)
Any other code It’s not possible to get
here…
Is ere RF power at
VCO output?
there RF power at
Hinku input?
ENOUGH RF
power at Hinku input?
Is the RX VCO frequency
th
Is
Is there
correct?
Is CP1 voltage ok?
Propable cause:
Test problem
RFBUS failure (but this
should be ok if we’ve
the V
gotten this far)
Propable cause:
Poor solder/Faulty Hinku
Other possible reasons:
VCP line shorted to ground
Propable cause:
Poor solder/Faulty RETU
Propable cause:
Go through “ Are
omponents near the RX
VCO ok?” and “ RX VCO
c ntrol voltage VC ok?” link
no help then change
Hinku, if still not working
change VCO.
Propable cause:
Correct frequency and Hinku
says it’s not locked then
change Hinku
Propable cause:
Poor solder/Faulty balun
Propable cause:
Poor solder/Faulty VCO
there supply voltage for VCO?
If VR1RX is OK then the problem is
VCO, otherwise Hinku is faulty. (VR1
is routed through Hinku to VCO)
Propable cause:
Balun or VCO
Is
o
if
c