Read Sharp LC-28HM2E (serv.man2) Service Manual online
39
LC-28HM2
AN-28SP2
1st address 2nd address
item
MIN
MAX
Initial setting
Remarks
00
02
Initial setting
00
FF
4
00
06
Horizontal position
00
FF
00
00
07
Vertical position
00
FF
00
00
09
Delay adjustment
00
FF
00
00
10
Test pattern display
00
00
11
Test pattern selection
00
0F
00
00
F0
PWM control
00
0F
3
00
F3
PWM frequency
00
FF
0A
Lower
00
F4
PWM frequency
00
0F
05
Upper
00
F5
PWM duty
00
FF
E8
Lower
00
F6
PWM duty
00
0F
00
Upper
(2) Controller
6. Adjusting method
Adjusting conditions
Adjusting method
+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.
*1
2. Apply the specified jig to the screen center.
3. Observe the output from the jig with
3. Observe the output from the jig with
oscilloscope.
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: After adjustment, write “00 10 00” again in the setting to restore initial state.
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