Mass Production Critical To Quality (Mp Ctq) - Philips NTX800 Service Manual

Reference: WX-B-009-01
Model : NTX800
8

Mass Production Critical To Quality (MP CTQ)

8.1 Acoustics MP CTQs
MP Check
Item to check
CTQ frequency
Acoustic
frequency
Sampling /
YES x
response
2pcs/hr
(SPL)
Acoustic
frequency
YES Sampling / x
response
2pcs/hr
(SPL)
Acoustic
frequency
YES Full
x response
(SPL)
Rattling, Rub
YES Full x
and buzz
Rattling, Rub
YES Full x
and buzz
x
YES Full x Air leakage
YES Full x Air leakage
Polarity &
YES Full x
Channel
Polarity &
YES Full x x
Channel
Confidential
Title: Product Performance Specification
Requirement / Test condition /
Specification description
Within target
mask, both
speakers. Measured on the
(compared with center of speaker
approved box, 1.0m, smoothed
Reference 1/3 octaves.
Samples
performance)
Within target
mask, both
speakers. Measured on the
(compared with center of speaker
approved box, 1.0m, smoothed
Reference 1/3 octaves.
Samples
performance)
Within target
Measured on the
mask, both
center of speaker
speakers.
driver, in
(compared with
measurement box on
approved
production line,
Reference
0.5m, smoothed 1/3
Samples
octaves.
performance)
No any rub and
Check with Philips
buzz noise from
rattling check track at
drivers;
maximum volume.
No any audible
(30 seconds for
rattling noise
production, 1 minute
from speaker
for QA)
boxes.
No any rub and
buzz noise from Sweeping with sine
drivers; wave, the power and
No any audible frequency range
rattling noise refer to driver/LSB
from speaker spec.
driver/LSB.
Check with Philips
No audible air rattling check track at
leakage noise maximum volume.
from speaker (30 seconds for
box. production, 1 minute
for QA)
Meet the
requirement.
Measure the
Acceptance
impedance curve of
criteria refer to
the speaker box
driver/LSB
spec.
Check with Philips
As specified, for
Channel & Phase
electrical
check track (10
outputs and
seconds for
speakers.
production)
As specified, for
Polarity meter.
speakers.
Page 23 of 25
Equipment and facilities
x x
x x
x
x x
x x
x x
x
x
x
Information
that needs to
be recorded,
Device setting
with product
identification
number
Out of box SPL curves
settings (or data).
SPL curves
n/a
(or data).
SPL curves
n/a
(or data).
Maximum
volume and Measurement
x bass, strongest curve/value if
powerful EQ available
(Rock + DBB3)
n/a n/a
Maximum
volume and Measurement
x bass, strongest curve/value if
powerful EQ available
(Rock + DBB3)
IMP curves
n/a
(or data).
Out of box
x n/a
settings
n/a n/a