DV-L80 (serv.man3). Section 1-8 - Sharp DVD Service Manual (repair manual). Page 17

Notes: 1) When replacing the IC401 (IX1690GE) and IC507 (SNT1G08C), readjustment is required.

2) Adjustment must be made at an ordinary temperature.

If temperature is high immediately after reflow or if IC temperature has risen immediately after continuous operation,
adjustment must not be made.

(Adjustment spec)

-30mV - +10mV

(Inspection specification) -30mV - +20mV

(Adding temperature drift after adjustment)

The "MENU" key input.

The "1" key input.

"F0" key input (Keep pressing the "Return" and "Vol_up" keys for about 3 second.)

From (2)

Connect the L side of the voltmeter to CN302 (2 pin) and the H side to CN302 (4 pin).
With the cross key "

'

" or "

"

" set the output voltage to the range from -30mV to +10mV.

FOCUS offset adjustment mode

The "RETURN" key input.

Connect the L side of the voltmeter to CN302 (3 pin) and the H side to CN302 (1 pin).
With the cross key "

'

" or "

"

" set the output voltage to the range from -30mV to +10mV.

TRACK, offset adjustment mode

Make sure that the spindle motor stops.

Press the "RETURN" key.

FOCUS
000000**  000000**

FOCUS
000000**  000000++

DYNAMIC TEST
30000000 00000000

F00000000 00000000

The ++ part is changed every 
time of the key input.

TRACK 
000000**  000000++

The ++ part is changed every 
time of the key input.

ADJUST COMPLETE
00**00**  00000000

The investigated result is displayed in the ++ part.
The displayed contents are from the left "Focus offset adjustment value", "Track offset adjustment value".

End of adjustment

OSD display

1. Connect the DVD main unit and the computer as shown on the right. And then start-up the software for rewriting.
2. Turn on the power while the play key and the pause key of the DVD main unit are kept pressed at the same time. (Keep pressing

about 3 second.)

The red LED flickers 5 - 6 times with the 0.5 second cycle and then the green LED flickers with 0.1 second cycle.

3. According to the computer display, data transfer prompt is issued by inputting “Y” and

pressing ENTER key, and when the rewriting starts normally,

The LED in green lights on from flickering.

4. When the rewriting is completed normally,

The green LED lights on.

5. After completing the rewriting and checking the display of No. 4 shown above,

always press the “STOP” key. After that turn off the POWER.

6. Treatment in case of rewriting error

1

 The red LED flickers with 0.1 second cycle (When the stop key is pressed it

return to the condition of “2” so write again.)

2

 The red/green LED flickers by turns (When the stop key is pressed it becomes

the condition of “5” so write again from “1”.)

Personal computer

(DOS)

DVD itself

Connect to the video input 
terminal. 
Connect the “red” audio cable to jig.

Fixture for the ROM renewal