Service Adjustments - Sharp 37GT-27S Service Manual

Service Mode Function
All required adjustments for servicing this TV set, may be done in «Service Mode», excepting G2 and FOCUS.
How to access the Service Mode
1. Turn the receiver on and ensure that it is tuned into a test pattern.
2. Turn the receiver off using the mains switch.
3. Press the volume down and channel up buttons together. See Figure 1.
4. Continue pressing the volume down and channel up buttons while turning
the mains on using the mains switch. See Fig. 1.
5. Keep pressing the volume down and channel up buttons until the picture appears.
6. Release the two buttons and the receiver is now in the Service Mode.
To move between the various service mode functions, use the channel up and down buttons.
Use the volume buttons to change the data to the desired value.
The data will be stored automatically when exiting the Service Mode.
To exit the service mode, press the stand-by button on the remote control or turn the receiver off
with the mains switch.
Displayed
on screen
-SERV-
AGC
a.
AFT F
b.
AFT C
c.
AFT FL
d.
AFT CL
e.
H-SHFT
f.
V-SHFT
g.
V-AMPL
h.
GAIN R
i.
GAIN G
j.
GAIN B
k.
CUT R
l.
CUT G
m.
NVM
n.
POS (Green)
VALUE (Red)

SERVICE ADJUSTMENTS

Hexadecimal /
Decim. Range
00∼ 3F
02∼ FE
00∼ 0F
02∼ FE
00∼ 0F
00∼ FF
00∼ 3F
00∼ 0F
00∼ 3F
00∼ 3F
00∼ 3F
00∼ 3F
00∼ 3F
00∼ 3F
00∼ FF
On Screen
XXXX
Display
(Blue)
XX
XX
Function
Indicates operative Service Mode
Auto Gain Control
Auto Frecquency Control Fine
Auto Frecquency Control Coarse
Auto Frecquency Control Fine
Auto Frecquency Control Coarse this model
Horizontal Shift
Vertical Shift
Verical Amplitud
Red Gain
Green Gain
Blue Gain
Red Cut Off
Green Cut Off
NVM Data Change
5
37GT-27S
CH
3
4
Figure 1
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