Adjustment Of The Tv Electrical Circuitry - Sharp VT-G14 Service Manual

VT-G14
VT-G21

ADJUSTMENT OF THE TV ELECTRICAL CIRCUITRY

1. Calling the service mode
Get the service test points (TP1002 and TP1003) of the set short-circuited.
2. Getting out of the service mode
Get the above service test points open.
3. On-screen display in the service mode
A service mode item and its data appear in two lines
at the lower left on the screen.
Service mode
Item
DIRECT MODE
V-AMPLITUDE
V-LINEARITY
V-OUT PHASE
H-POSITION
BELL FILTER
R-Y BLACK OFFSET
B-Y BLACK OFFSET
Y-SUB CONTRAST
SUB COLOUR
SUB BRIGHT
SUB TINT
`NICAM D/K
`IF INT/EXT
`AGC GAIN
`AGC OFF
`FM SOUND ID
`AUTO MUTE
`NICAM LOW ERROR LIMIT
`NICAM UP ERROR LIMIT
`NICAM OUT LEVEL B/G
`NICAM OUT LEVEL I
`NICAM OUT LEVEL D/K
`NICAM OUT LEVEL M
`FM OUTPUT LEVEL
Note :
1) Item selectable by the CH '" buttons and data by the VOL '" buttons (effective on both
the remote controller and the set)
2) `This item is not used with the VT-G14 and VT-G21 (but displayed on the screen).
ADJUSTMENT PRECAUTIONS
Top line : Service mode item (See below)
Bottom line : Data (See below)
Display
DIRCT
V-AMP
V-LIN
V-POS
H-POS
BELL
R-Y
B-Y
CONT
COLOR
BRI
TINT
N-D/K
IF-IN
AGCGA
AGCOF
FMID
AMUTE
NERRL
NERRU
B/G
I
D/K
M
FM
Data Variable range
Adjustable in the DIRECT MODE
0 ~ 127 R CUT OFF
0 ~ 31 G CUT OFF
0 ~ 7 B CUT OFF
0 ~ 31 G DRIVE GAIN (0 ~ 255)
0 ~ 3 B DRIVE GAIN (0 ~ 255)
0 ~ 15
0 ~ 15
0 ~ 31
0 ~ 240
0 ~ 150
0 ~ 37
0 ~ 1
0 ~ 1
0 ~ 31
0 ~ 1
0 ~ 3
0 ~ 1
0 ~ 255
0 ~ 255
0 ~ 31
0 ~ 31
0 ~ 31
0 ~ 31
0 ~ 31
10
(0 ~ 255)
(0 ~ 255)
(0 ~ 255)