Nokia NHL-2NA Series Troubleshooting Instructions page 36
Transceiver
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Also See for NHL-2NA Series:
- Disassembly instructions manual (34 pages) ,
- Service tools (34 pages) ,
- Schematics (24 pages)
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NHL-2NA
GAIN MAX
LIMIT FAIL
NO
Was
reflectance
target
properly
placed?
YES
Disassemble the
phone to MJS-9Q
Check TX and RX
path, replace needed
components, fix solder
problems (1)
Try calibration in the
MJS-9Q
YES
GAIN MAX
LIMIT
FAIL?
NO
Reassemble the phone,
replace optics.
Is
calibration
OK?
YES
Save calibrated values
to the phone
1 PD TX line: RSENSE R347 is connected to GND and IRED V334 to Vbatt
RX line: photodiode V335 is connected to GND. See figure 5.
2 If there is no obvious fault, replace first V335, then V334. Try calibration in the
MJS-9Q in between.
Page 30
Figure 7: GAIN MAX LIMIT FAIL troubleshooting
Fix the target and
repeat calibration
Save calibrated values
Replace AEM
Try calibration in the
MJS-9Q
Follow respective error
message
¤Nokia Corporation
CCS Technical Documentation
NO
Is
Follow respective
calibration
error message
OK?
YES
to the phone
GAIN MAX
LIMIT
FAIL?
NO
YES
Beyond economical
repair
Issue 1 07/02
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Troubleshooting
