Sharp SX80J9, Руководство по обслуживанию

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10
10-1 10-2
SX80J9
3. MAX BEAM ADJUSTMENT : R1631
1. Receive the E-5CH "MONOSCOPE PATTERN" signal.
2. Using the remote controller, call the Video Normal mode.
3. Connect the ammeter between TP601 and TP602.
• Ammeter's full scale : 3mA range
• Ammeter's positive (+) read : TP601
• Ammeter's negative (-) read : TP602
4. Adjust R1631 so that the beam current be 2.0 mA.
Note: Before starting this adjustment, warm up the unit for 30 minutes or longer at a beam current of 1900
± 50µA.
4. SUBBRIGHTNESS (I 2 C bus adjustment)
1. Receive the JA12CH (window pattern) signal.
2. Using the remote controller, call up the normal video mode.
3. With a brightness meter ( with “Y” of CA - 100 ), adjust the sub-brightness control so that the right-hand dark/
white portion be 1.8 cd.
CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST
ADJUSTMENT (Continued)
HORIZONTAL AND VERTICAL CIRCUIT ADJUSTMENT
1. MAIN PICTURE ADJUSTMENT
For this items 1 thru 6 below, use the remote controller in the service mode.
1. V-AMPLITUDE 50:
Adjust the overscan 8.5% (E-5).
2. V-LINEARITY 50: Adjust to get the best linearity.
3. V-S-CORRECTION 50: Preset (readjust if the linearity is poor).(10)
4. V-PHASE 50 (V-CENTER): Align the screen center with CRT's geometrical center (E-5)
5. H-PHASE 50 (H-CENTER): Align the screen center with CRT's geometrical center (E-5)
6. H-SIZE: Adjust the overscan 8.5% (E-5).
7. EW-PALABOLA (SIDE-PIN): Adjust so that the second vertical lines from the left and right ends of the
crosshatch pattern be straight (E-2).
8. V-BIAS: Preset (7)
9. V-S-CORRECTION: Preset (15)
10.EW-CORNER (SUB-SIDEPIN): Adjust so that the end of the crosshatch pattern be straight.
11.TRAPEZIUM: Preset (Readjust ifnthe trapezium is poor). (25)
12.V-COMPENSATION: Preset (5)
13.H-COMPENSATION: Preset (5)
14.Others: For the V-AMPLITUDE 60, V-LINEARITY 60, V-S-CORRECTION 60, V-
PHASE 60, H-PHASE60, and H-SIZE 60 adjustment, their corrected data
are automatically entered when the corresponding 50 Hz mode adjust-
ments are made.
The signals of the receive channnels in paretheses are follows.
(E-2):Crosshatch pattern (50Hz) (E-5):Monoscope pattern (50Hz)
If an error is too much in checking any of the 60Hz items, readjust the item in 60Hz mode
HORIZONTAL AND VERTICAL CIRCUIT ADJUSTMENT
2. FOCUS ADJUSTMENT
1. Receive the E-5CH "MONOSCOPE PATTERN" signal.
2. Using the remote controller, call the Video Normal mode.
3. Adjust the focus control so that the "SHARP" at the upside of the screen.
1. H-POSITION (H-POS), V-POSITION (V-POS)
(I
2
C bus adjustment)
1. H-Position
The data has been factory-set.
If the sub-screens in the four corners are hori-
zontally malpositioned, readjust data so that the
right and left margins be the same.
For the adjustable range, see the figure at right.
2. V-Position
The data has been factory-set.
If the sub-screens in the four corners are verti-
cally malpositioned, readjust data so that the top
and bottom margins be the same.
For the adjustable range, see the figure at right.
* The horizontal and vertical positions are adjusted
in order to offset the entire range.
<adjustment procedure>
Make sure the screen size (H/V), centering (H/V), linear-
ity (V), parabolism (H), and parabolic corner (H) are all
well adjusted. Receive the E-5CH master screen signal.
Adjust the left and top margins of the upper left sub-
screen to 85%. (See the figure at right.)
Note that raster rotation must be considered too.
2. SUB H-PHASE 50Hz (HSIDLY5)
1. The data has been factory-set.(E-5)
If the picture is noticeably degraded, readjust the data so that the left and right overscans in the sub-screen be
the same.
3. SUB H-PHASE 60Hz (HSIDLY6)
1. The data has been factory-set.
When the SUB-H-SHIFT (50) data is adjusted, the corrective data is automatically programmed.
A
C
B
D
Top end of effective CRT screen
Bottom end of effective CRT screen
Right end of effective
CRT screen
Left end of effective
CRT screen
SUB-SCREEN POSITION ADJUSTMENT
85%
85%