37GT-25. version 00 - Sharp TV Service Manual (repair manual). Page 4

•SERVICE MODE FUNCTION

This mode funtion is provided to assist with the settings of those adjustments that may vary from one
Picture Tube to another, or between models.

In order to use the Service Mode
1. Press main switch to OFF.
2. Connect Test Pattern signal to antenna terminal.
3. Press 

∨

 

, CH 

∨ 

 buttons and main switch to ON simultaneously.

4. -SERV- will appear on screen. Service mode is now entered.
5. Select adjustment using buttons 

∧ 

CH 

∨

.

   To exit Service Mode, press main switch to OFF or press MENU button on R/C.

a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
i.

-SERV-
AGC
AFT
H-SHFT
V-SHFT
V-AMPL
V- SLOP
S-CORR
Y-DLY
GAIN R
GAIN G
GAIN B
NVM

00

∼ 3F

00 

∼ 7F

(Adjust to 40)

00 

∼ 3F

00 

∼ 3F

00 

∼ 3F

00 

∼ 3F

00 

∼ 3F

00 

∼ 3F

00 

∼ 3F

00 

∼ 3F

00 

∼ 3F

Indicates operative Service Mode.
Auto Gain Control
Auto Frequency Control
Horizontal Position shift.
Vertical Position shift.
Vertical Amplitude shift.
Vertical Symmetry alteration.
S Correction
Luminance Chroma Delay.
Red Gain.
Green Gain.
Blue Gain.
Access to NVM (Non Volatile
Memory).

In order to have access to the desired storage location, buttons 

∨

 

, 

∧ 

should be pressed, as required ,

to obtain a higher or lower location, respectively.

6. For « a » thru « k » Selections.
    Adjustment to a selection cam be made by pressing buttons  

∨

 

, 

∧.

 

  A  colour bar is displayed on the OSD to indicate the adjustment  position, together  with hexadecimal

number ( Not for GII adjustment).

Assigned value

Storage location

HEXADECIMAL
NUMBERS

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

○

FF

CURSOR

       BAR

For « i » selection
NVM storage location settings variants.     NVM

   XX

              XX