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CAUTION:
Before servicing this chassis, it is important that the service technician read the "Safety
Precautions" and "Product Safety Notices" in this service manual.
ATTENTION:
Avant d'effectuer l'entretien du châassis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die ,,Sicherheitshinweise" und ,,Hinweise
zur Produktsicherheit" in diesem Wartungshandbuch zu lesen.
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
Data
contained
within
this
Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d'entretien peuvent faire l'objet
de modifications en vue de perfectionner
le produit.
Die
in
diesem
Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
OCTOBER 2000
No. 0502
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
CM615ET
CM615ET302
CM615ET303
CM615ET321


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1
1111. DISPLAY ALIGNMENT
A. Times & Display Size
For all presetting mode listing in section 2.4 shall be within the limitation:
H. WIDTH
306 ± 4 mm
V. HEIGHT
230 ± 4 mm
The external control range of the data area, shall be as follows;
Max. horizontal size : overscan the screen
Min. horizontal size
:
285mm
Max. vertical size
: over the screen
Min. vertical size
:
202 mm
B. Picture Position
For all presetting mode listing in section 2.4 shall be within the limitation:
H.PHASE
SCREEN CENTER ± 3 mm
V.CENTER
SCREEN CENTER ± 3 mm
The external control ranges of display for all modes listed in section 2.4
H.POSITION
50 mm
V.CENTER
25 mm
C. Linearity
The CONTRAST and BRIGHTNESS control shall be properly adjusted at 20 F-L with Full-intensity
reverse pattern, then change to crosshatch Pattern 12x10 (Hx V), the size of grid of crosshatch pattern in
every display mode shall not vary than 10%.If two line is next to each other, 5% if they are not next to
each other. The calculation formula was listed below:
H max - H min
V
max
V
min
x100% or
x
100%
(H max + H min) / 2
(V max + V min) / 2


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2
D. Geometry Distortion (All Preset Mode) :
1) The Contrast and Brightness control shall be properly adjusted at 20 F-L with full intensity reverse
pattern, then change to crosshatch pattern.
2) Pincushion distortion shall be less than H : 1.5% and V : 1.5%.
3) Barrel distortion shall be less than H : 1.5% and V : 1.5%.
4) Trapezoid and parallelogram distortion shall be less than H : 1.5% and V : 1.5%.
5) Distortion of four corners shall be less than 3mm x 3mm.
6) Parallelogram distortion shall be less than 2.0%
7) Tilt distortion shall be less than 1/2 degree when facing east and less than 1 degree when turning
around 360 degree.
8) Tilt distortion shall be less than 2 mm when facing east and less than 1 degree when turning around
360 degree The measurement of tilt is defined to measure the vertical axis with respect to the bezel,
the absolute value of the difference between the extreme left and right measurement of the center
horizontal line.
E. Alignment Procedure
E-1. Brightness Adjust:
Adjust the VR980, have the +15VS By 14.9V
±0.1V (The voltage of the C944) in TIMING 1.
Check below items.
The voltage of C949 : 179
± 3V
C947 : 75
± 2V
C946 : 44
± 1.5V
C940 : 8.4
± 0.4V
P990 : 12
± 0.3V
Short-Circuit protection function check.
The power source is 230VAC input.
When short the C944, all output voltage should be shut down and unlatch.
When recover normal condition, all output voltage should recover automatically.


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3
E-2. Light output adjust
Select Timing 1, preset BRI. And CONT. to max. position.
Adjust G2 to get G2 = 550V
± 10V
Adjust VR803 to get light output = 0.6FL ~ 0.5FL
Select Timing 2, adjust VR405 to get pattern over scan. (H SIZE 100%)
F. White Balance Adjustment (9300°as major temperature) Low light
adjust
9300
°
6500
°
5000
°
x = 0.283
± 10
x = 0.313
± 10
x = 0.324
± 10
y = 0.297
± 10
y = 0.329
± 10
y = 0.342
± 10
Y = 0.6 ~ 0.8FL
Y = 0.6 ~ 0.8FL
Y = 0.6 ~ 0.8FL
Select Timing 6, adjust BRI. And CONT. to max. disconnect R. G. B. signals, adjust R/B BAIS to 100 scale
(OSD then solowly adjust G BAIS to 100 scale adjust VR803 to get light output = 0.6 ~ 0.8FL for 9300,
repeat above steps for 6500 and 5000 R/B GAIN setting to get raster color temperature within specified,
finally, adjust BRI to get raster = 0.06FL.
High light adjust
9300
°
6500
°
5000
°
x = 0.283
± 10
x = 0.313
± 10
x = 0.324
± 10
y = 0.297
± 10
y = 0.329
± 10
y = 0.342
± 10
Y =
FL
Y =
FL
Y =
FL
Select Timing 4, measure 2 "square, set CONT. to Max, position and SUB-CONT to 127, R/B GAIN to
200, G
GAIN to 200, adjust SUB-CONT to get light output = 50
FL for 9300, repeat above steps for 6500
and
5000 R/B GAIN setting to get color temperature within specified.
3. Select Timing 3 with full white pattern adjust OSD-ABL (SUB BRIGHTNESS) to get full white light
output = 30
± 1 FL.
G. Focus Adjustment
G-1. Adjust brightness, have the brightness of raster be 0.06FL and contraset be 35FL in timming 6.
G-2. Adjust the G4a and G4b of theFBT, have focus be in the best condition on the 1/4 diagonal of
screen in timing 5.


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4
H. Convergence Adjustment
Input R+B and R+G signals, make sure convergence within specified (if not 4 pole and 6 pole). A zone =
0.3MM., B zone 0.4MM. (X) < 0.4MM, (Y) < 0.4MM.
NOTE : 1 A area = 230mm (circle)
2 B area = 306 x 230 mm
I. Presetting Modes Adjustment
There are totally 12 preset modes, individual adjust is needed.
H-SIZE adjust : adjust control key to get H-SIZE = 306
± 2mm.
H-CENTER adjust : adjust control key to get center within
± 2mm
V-SIZE adjust : adjust control key to get V-SIZE = 230
± 2mm
V-CENTER adjust : adjust control key to get center within
±2mm
Geometric adjust : adjust control key to get minimize distortion.
H-linearity check : check and make sure linearity meet spec..
(CROSS HATCH PATTERN 10X8)
2(MAX - MIN)
X100%
MAX + MIN
Any : <10%
Adjacent : <5%
V-linearity check : check and make sure linearity meet spec.
2(MAX - MIN)
X100%
MAX + MIN
Any : <10%
Adjacent : <6%
Geometric check : check and make sure geometric meet spec.
Get into OSD select EE-USER item, press ENTER till OSD disappear then turn off power, disconnect JP1,
turn on power again, make sure all of the alignment parameters has been stored properly, make H-SIZE
adjust range can OVER SCAN and -5%, PHASE adjust range >15mm, V-SIZE adjust range can OVER
SCAN and -6%, V-CENTER adjust range >20mm and make sure TILT adjust work properly.