Hitachi CM615ET User manual

CAUTION:
Before servicing this chassis, it is important that the service technician read the “Safety
Precautions”and“ProductSafetyNotices”inthisservicemanual.
ATTENTION:
Avantd’effectuerl’entretienduchâassis,letechniciendoitlireles«Précautionsdesécurité»
etles«Noticesdesécuritéduproduit»présentésdansleprésentmanuel.
VORSICHT:
VorÖffnendesGehäuseshatderService-Ingenieurdie„Sicherheitshinweise“und„Hinweise
zurProduktsicherheit“indiesemWartungshandbuchzulesen.
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
demodificationsenvuedeperfectionner
leproduit.
Die in diesem Wartungshandbuch
enthaltenenSpezifikationenkönnensich
zwecksVerbesserungenändern.
OCTOBER 2000
No. 0502
SPECIFICATIONSAND PARTS ARE SUBJECTTO CHANGE FOR IMPROVEMENT
CM615ET
CM615ET302
CM615ET303
CM615ET321

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1. 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:
Hmax-HminVmaxV min
x100% or x100%
(Hmax + Hmin) / 2 (Vmax + Vmin) / 2

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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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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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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 Aarea = 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.

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J. Power Adjustment
J-1. Adjustthe VR980, have the +15Vs be 15.3v ± 0.1v (the voltage of the C944) in timing 1.
J-2. Checkbelow items the voltage of C949 : 179
± 3v
J-3. Short-circuit protection function check
when short the C944, all output voltage should be shut down and unlatch
J-4. Side Pincushion, Tilt and GeometryDistortion Adjustment
1. Input timing 1, adjust the display be normal position and size.
2. Adjustfront control key to get the bestpincushion distortion and tilt.
3. SelectP502 and adjust VR402~VR404 to get the best geometrydistortion.
J-5.Focus Adjustment
1. Input timing 1, EXT.BRIGHTNESS move to center position. UseEXT.CONTRAST set the
brightnessto 25FL.
2. Adjust Focus VR (mounting on F.B.T), to get best focus.
C947 : 75
±±±± 2v
C946 : 44
±±±± 1.5v
C940 : 8.4
±±±± 0.4v
the power source is 230vac input
when recover normal condition, all output voltage should recover automatically.

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J-6. Preset Timing Adjustment
1. Input each PRESET MODE timing, and use front control key adjust the display to the normal position
and size, and wait for 5 seconds.
2. Switch to next timing repeat 1 process. Until every PRESET MODE timing have been adjusted.
J-7. Timing And Pattern
Timing mode pattern.mdnm/
1 VESA 68.6k CROSS HATCH
2 VESA 68.6K 2" SQUARE
3 VESA 68.6K FULL WHITE
J-8. Power Saving Function Check
The power source is 230Vac input
When remove the sync signal, the monitor should enter suspend mode and then off mode.
When power saving, the power consumption of monitor should be less than: suspend mode 8w off mode
The monitor recovering time from suspend mode or off mode to on mode should be less than 5 seconds.
TABLE 1
TIMING MODE PATTERN
1. 64K 51 CROSSHATCH
2. 37.8K/60HZ 51 CROSSHATCH
3. 60K Full-white
4. 60K 5×2″squares
5. 68K “me”
6. 68K 5×2″squares

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PRESETTING MODES TABLE2
D:display B:backporc
h P:pulse F:front
1 VGA 640
350 25.175 P/N 31.469 70.087 31.778 14.268 25.422 11.122 907 1.875 3.813 0.064 636 1.207
2 IBM
VGA 640 480 25.175 N/N 31.469 59.940 31.778 16.683 25.422 15.253 907 1.0169 813 0.064 636 0.318
3 VESA
640
480 31.5 N/N 37.5 75 26.667 13.333 20.317 12.8 3.81 0.427 2.032 0.08 0.508 0.027
4 VESA
640
480 36 N/N 43.269 85.008 13.111 11.764 17.778 11.903 2.222 0.578 1.556 0.069 1.556 0.023
5 IBM
VGA 720 400 28.321 N/P 31.468 70.085 31.468 70.085 31.778 14.268 25.422 12.711 1.907 1.0804 0.636 0.413
6 VESA
800
600 40 P/P 37.879 60.317 36.4 16.579 20 15.84 2.2 0.607 3.2 0.106 1 0.026
7 VESA
800
600 49.5 P/P 46.875 75 21.333 13.333 16.162 12.8 3.232 0.448 1.616 0.064 0.323 0.021
8 VESA
800
600 56.25 P/P 53.674 85.061 18.631 11.756 14.222 11.179 2.702 0.503 1.138 0.056 0.569 0.019
9 VESA IBM
XGA
1024
764 65 N/N 48.363 60.004 20.677 16.666 15.754 15.88 2.462 0.6 2.092 0.124 0.369 0.063
10 VESA 1024
768 78.75 P/P 60.023 75.029 16.66 13.328 13.003 12.795 2.235 0.466 1.219 0.05 0.203 0.017
11 VESA 1024
768 94.5 P/P 68.677 84.997 14.561 11.765 10.836 11.183 2.201 0.524 1.016 0.044 0.508 0.015
12 VESA 1152
864 108 P/P 67.5 75 14.815 13.333 10.667 12.8 2.37 0.474 1.185 0.044 0.593 0.15
13 VESA 1280
1024 108 P/P 63.981 60.02 15.63 16.661 11.852 16.005 2.296 0.594 1.037 0.047 0.444 0.016

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Fig. 2
Fig. 3

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2. CONTROL AND CONNECT LAYOUT
Main PCB