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Philips M3001A Service Manual Page 209

M3/m4 monitors,measurement server,measurement server extensions.
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No wave dis-
played but chan-
nel is present
Mainstream CO
"CHECK CAL"
INOP
Accuracy prob-
lems
No wave dis-
played and no
channel present
Audio Speaker related problems
Buzzing noise
accompanying
alarm, INOP, or
QRS sound.
No tone alarms.
Speaker will not
work.
Troubleshooting the Instrument
Part 2 Isolating and Solving Instrument Problems
Measurement Server Extension related problems
2
Invalid calibration
Incorrect N
O setting
2
Incorrect humidity correc-
tion setting (BTPS/STPD)
Incorrect Max Hold set-
ting
Invalid calibration
1.Measurement Extension
is used with a monitor
and/or Measurement
Server with Release A
software (A.xx.xx)
2.CO
measurement
2
switched off
Speaker mounting prob-
lem, for example, the
speaker is ajar due to
being dropped.
Make sure audible tones
are switched on.
Cable disconnected.
Defective speaker.
Defective Audio Circuit.
Check for INOPS and fol-
low recommended actions
Follow the recommended
actions from INOP table
1. Check Settings:
- N
O correction
2
- BTPS or STPD
- Max Hold or standard
averaging
2. Perform accuracy check
on calstick and calibrate,
if necessary.
1. Check if the Measure-
ment Extension is sup-
ported by the system
configuration (hardware
and software)
2. Check that CO
meas-
2
urement is switched on
Mount speaker properly or
replace speaker.
Reconnect cable.
Replace speaker.
Replace the System
Board.
193

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