Sharp LC-28HM2U Service Manual page 39

Lcd av monitor
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(2) Controller
1st address 2nd address
00
02
00
06
00
07
00
09
00
10
00
11
00
F0
00
F3
00
F4
00
F5
00
F6
6. Adjusting method
Adjusting conditions
+B adjustment (M+5VADJ item)
1. Hook up DC voltmeter at connector side of
FB2005.
Opposed bias adjustment (COM item)
1. Write "00 10 03" in the controller setting of
the OSD to produce solid black screen.
2. Apply the specified jig to the screen center.
3. Observe the output from the jig with
oscilloscope.
*1: After adjustment, write "00 10 00" again in the setting to restore initial state.
item
Initial setting
Horizontal position
Vertical position
Delay adjustment
Test pattern display
Test pattern selection
PWM control
PWM frequency
PWM frequency
PWM duty
PWM duty
1. Adjust DC/DC5V line output voltage to 5.1 ±0.05Vp-p.
1. Adjust bias so that the waveform peak-to-peak is minimized.
*1
39
MIN
MAX
Initial setting
00
FF
00
FF
00
FF
00
FF
00
0F
00
0F
00
FF
00
0F
00
FF
00
0F
Adjusting method
LC-28HM2
AN-28SP2
Remarks
4
00
00
00
00
00
3
0A
Lower
05
Upper
E8
Lower
00
Upper

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