W DOC AIRBUS | AMM A320F

Measurement of the Display Unit Brightness

TASK 31-63-22-200-001-A
Measurement of the Display Unit Brightness

ZONE: 210
1. Reason for the Job
Refer to the MPD TASK: 316322-02
FUNCTIONAL CHECK OF DISPLAY UNITS BRIGHTNESS
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
F1395993
1
LUMINANCE METER
LS100
1
LUMINANCE METER
LS110
1
LUMINANCE METER
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-32-00-860-008-A
Procedure to Get Access to the SYSTEM REPORT/TEST/INST Page
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
F Brightness Measurement Chart
3. Job Set-up
Subtask 31-63-22-860-055-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the Electronic Instrument System (EIS) start procedure (Ref. AMM TASK 31-60-00-860-001).
   (3) On the center pedestal, on SWITCHING panel 8VU:
  • Make sure that the EIS DMC and ECAM/ND XFR selector switches are set to NORM.
   (4) Select one of these luminance meters:
  • F1395993 LUMINANCE METER with lens 110,
    or
  • LS100 LUMINANCE METER with lens 110
    or
  • LS110 LUMINANCE METER with lens 110.
Subtask 31-63-22-865-055-A ** ON A/C NOT FOR ALL
B. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUEIS/PFD CAPT/SPLY11WT1E03
** ON A/C NOT FOR ALL
49VUEIS/ECAM/CTL/PNL15WTE12
49VUEIS/DMC1/SPLY10WT1E11
49VUEIS/DMC3/STBY/SPLY14WT1E10
49VUEIS/DMC1/SWTG21WT1E09
49VUEIS/DMC3/SWTG21WT3E07
49VUEIS/ECAM DU/UPPER/SWTG24WT1E06
49VUEIS/ECAM DU/UPPER/SPLY13WT1E05
49VUEIS/PFD CAPT/SWTG22WT1E04
49VUEIS/ND CAPT/SWTG23WT1E02
49VUEIS/ND CAPT/SPLY12WT1E01
49VUSDAC/1/SPLY3WVF04
49VUFWS/FWC1/SPLY3WWF01
49VULIGHTING/XFMR/115V.5V/ESS BUS29LPH03
** ON A/C NOT FOR ALL
49VUEIS/PFD/CAPT/SPLY11WT1E03
** ON A/C NOT FOR ALL
121VUEIS/DMC3/SPLY10WT3Q09
121VUEIS/DMC2/SPLY10WT2Q08
121VUEIS/FWC2/SPLY2WWQ07
121VUEIS/SDAC/2/SPLY2WVQ06
121VUEIS/ECAM DU/LOWER/SPLY13WT2R11
121VUEIS/ECAM DU/LOWER/SWTG24WT2R10
121VUEIS/DMC2/SWTG21WT2R08
121VUEIS/ND/F/O/SWTG23WT2R06
121VUEIS/PFD/F/O/SWTG22WT2R05
121VUEIS/ND/F/O12WT2R04
121VUEIS/PFD/F/O11WT2R03
122VULIGHTING/ANN LT SPLY/XFMR/BUS 227LPX05
4. Procedure
Subtask 31-63-22-710-054-A ** ON A/C NOT FOR ALL
A. Set the ECAM and the EFIS controls to the correct configuration:
   (1) On CAPT and F/O LIGHTING/LOUD SPEAKER control panels (301VU and 500VU) at the left and right of the instrument panels:
  • turn the PFD and ND potentiometers to the full BRT position (maximum brightness).
   (2) On the center pedestal, on the ECAM control panel:
  • turn the UPPER DISPLAY and LOWER DISPLAY potentiometers to the full BRT position (maximum brightness).

Subtask 31-63-22-710-055-A ** ON A/C NOT FOR ALL
B. Get the Maintenance Pattern on the DUs
   (1) With DMC1 control (CAPT PFD, CAPT ND and upper ECAM DU)
NOTE: If the DMC1 is unserviceable, you can use the DMC3.
To use the DMC3:
  • on the SWITCHING panel (8VU):
    . set the EIS DMC selector switch to CAPT/3.
     (a) On the MCDU, get the SYSTEM REPORT/TEST/INST page (Ref. AMM TASK 31-32-00-860-008).
     (b) On this page, push the line key (2R) adjacent to the EIS1 indication.
     (c) The EIS (DMC1) page comes into view. On this page, push the line key (4R) adjacent to the TEST indication. The EIS (DMC1) TEST page comes into view. On this page, push the line key (2L) adjacent to the DISPLAY TEST indication.
     (d) DISPLAY TEST IN PROGRESS comes into view. The maintenance pattern comes into view on the related DUs: CAPT PFD, CAPT ND and upper ECAM DU.
NOTE: The maintenance pattern is divided into squares that show the three colors.
   (2) With DMC2 control (F/O PFD, F/O ND and lower ECAM DU)
NOTE: If the DMC2 is unserviceable, you can use the DMC3.
To use the DMC3:
  • on the SWITCHING panel (8VU):
    . set the EIS DMC selector switch to F/O/3.
     (a) On the MCDU, get the SYSTEM REPORT/TEST/INST page (Ref. AMM TASK 31-32-00-860-008).
     (b) On this page, push the line key (3R) adjacent to the EIS2 indication.
     (c) The EIS (DMC2) page comes into view. On this page, push the line key (4R) adjacent to the TEST indication. The EIS (DMC2) TEST page comes into view. On this page, push the line key (2L) adjacent to the DISPLAY TEST indication.
     (d) DISPLAY TEST IN PROGRESS comes into view.The maintenance pattern comes into view on the related DUs: F/O PFD, F/O ND and lower ECAM DU.
NOTE: The maintenance pattern is divided into squares that show the three colors.
Subtask 31-63-22-280-050-A ** ON A/C NOT FOR ALL
C. Measure the intensity level of the green color for the related Display Units (DU) (CAPT PFD, CAPT ND and upper ECAM DU or F/O PFD, F/O ND and lower ECAM DU) and use the measurement chart as follows:
NOTE: For luminance meter F1395993, the K coefficient is written on the luminance meter.
For the luminance meter LS series, use default K coefficient 1.018.
NOTE: The K coefficient is the Color Correction Factor (CCF).
F Brightness Measurement Chart ** ON A/C NOT FOR ALL
   (1) On the measurement chart, write:
  • The Part Number (P/N) shown on the DU
  • The DU position (CAPT PFD, CAPT ND, F/O PFD, F/O ND, upper ECAM DU and lower ECAM DU).
     (a) Get the DU P/Ns from the MCDU:
       1 Do the procedure to get access to the SYSTEM REPORT/TEST INST:DISPLAY page (Ref. AMM TASK 31-32-00-860-008).
NOTE: The steps and the results of this procedure are shown on the MCDU that you use.
ACTION
RESULT
1. Push the line select key adjacent to the EIS1 (2 or 3) indication.
- The DMC1 (2 or 3) menu page comes into view.
2. Push the line select key adjacent to the LRU IDENT indication.
- The LRU IDENTIFICATION page comes into view.
   (2) Put a black masking tape on the two light sensors on the face of the DU.
   (3) Measure the intensity level of the green color for the related DU with the luminance meter:
     (a) Put the focal-plane indication of the luminance meter at approximately 21 cm (8.26 in.) from the face of the DU. Make sure that the green color fills the visual field (and not only the internal circle) of the luminance meter.
     (b) Push the start switch on the luminance meter to keep the value shown and then write this value on the measurement chart.
Subtask 31-63-22-710-056-A ** ON A/C NOT FOR ALL
D. At the end of the measurement, push the MCDU line key (6L), adjacent to the RETURN indication, four times to return to the MCDU main menu.
   (1) Set the ECAM and the EFIS controls to the usual configuration and decrease the DU brightness as follows:
  • On the SWITCHING panel (8VU):
    . set the EIS DMC selector switch to NORM.
  • On CAPT and F/O LIGHTING/LOUD SPEAKER control panels:
    . set the PFD and ND potentiometers to the minimum brightness position.
  • On the ECAM control panel:
    . set the UPPER DISPLAY and LOWER DISPLAY potentiometers to the minimum brightness position.
   (2) All the DUs return to their initial configuration.
5. Close-up
Subtask 31-63-22-970-050-A ** ON A/C NOT FOR ALL
A. Result Analysis
If LUM: VC > X Cd/m2
No task is necessary
If X > LUM: VC > Y
Remove the DU at the next 1200 FH or 12-month
check (the one that occurs first).
Then adjust it in the workshop.
If LUM: VC < Y
Remove the DU. Then adjust it in the workshop.
NOTE: The values given are minimum values. You can use higher values if necessary for your maintenance and flight operations personnel.
Cd/m2 = candela per square meter
V = measured value
Vc = corrected value
X, Y = thresholds to compare with the measured values
Subtask 31-63-22-970-051-A ** ON A/C NOT FOR ALL
B. Result Chart
   (1) Intensity level measured with luminance meter F1395993:
DU P/N
X/Y
A319/A320/A321
3906130302 or 3907130302
X
24.2
3906130302 or 3907130302
Y
21.0
3906130402 or 3907130402
X
14.3
3906130402 or 3907130402
Y
12.4
   (2) Intensity level measured with the luminance meter LS series:
DU P/N
X/Y
A319/A320/A321
3906130302 or 3907130302
X
26.1
3906130302 or 3907130302
Y
22.7
3906130402 or 3907130402
X
15.4
3906130402 or 3907130402
Y
13.4
Subtask 31-63-22-410-051-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Remove the access platform(s).
   (2) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002)
   (3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002)
   (4) Make sure that the work area is clean and clear of tools and other items.
[Rev.10 from 2021] 2026.04.01 00:38:30 UTC
"Aviabrain" 2025