Adjustment Precautions - Sharp SX80J9 Service Manual

ADJUSTMENT PRECAUTIONS

This model's settings are adjusted in two different ways: through the I
2
manner. The adjustment via I C bus control include present-only variable data.
1) Calling the service mode by the microprocessor
1 Make a short-circuit between TP1001 and TP1002, and the microprocessor is put in the service mode (adjust-
ment through the I 2 C bus control).
2 Perss the CH-DOWN key on the remote controller to get ready to select the modes one by one.
3 Perss the CH-UP key on the remote controller to get ready to select the modes in order opposite to the avove
step 2.
4 Using the VOL UP/DOWN keys on the remote controller, the data can be converted.
5 Remove the short-circuit between TP1001 and TP1002, and the microprocessor is put out of the service
mode.
2) Setting the initial (preset) values
1 Call up the service mode and turn on the main power switch. A new E
be automatically set to the initial data.
2 The initial data are as shown on pages 7,8,9 and 10.
3 Note that some items of the data must be modified and the others must stay as initial.
Note: After the chassis has been assembled, be sure to call up the service mode first and then turn on the
main power switch, as discussed in 2-1 above. If the main power switch is turned on without the
E 2 PROM initialized, an excess beam current may flow into the circuitry.
2 C bus control and in the conventional analog
2
PROM (judged by the first 4 bytes) can
3-1
2
SERVICE MODE (I C bus adjustment)
(1) Press the specific keys to change the modes as follows.
CUT-OFF mode
RASTER mode
NICAM PIP ADJUST
SPECIAL PICTURE
mode mode
50Hz ADJUST mode
V-AMP 50Hz
H-COMPENSATION
(V-AMP5)
(H-COM)
V-LINE 50Hz V-COMPENSATION
(V-LIN5) (V-COM)
TRAPEZIUM
S-CORRECT 50Hz
(TRAPE)
(V-SCOR5)
V-PHASE 50Hz
EW-CORNER
(V-PHS5)
(E/W-COR)
∫
H-PHASE 50Hz
CORRECTION
∫
(H-PHS5) (V- COR)
H-SIZE 50Hz V-BIAS
(V-SIZE5) (V-BIAS)
EW-PARABOLA
(E/W PAR)
In the direction of allow : CH DOWN Key
In the opposite direction : CH UP Key
* The characters in parentheses appear on the
on-screen display.
50Hz ADJUST COLOUR ADJUST
mode mode
60Hz ADJUST
SUB-ADJUST
mode
mode mode
In the direction of allow : CH DOWN Key
In the opposite direction : CH UP Key
COLOUR ADJUSTmode
BELL FILTER (SCM BELL)
SECAM R-Y (SCM R-Y)
SECAM B-Y (SCM B-Y)
CHROMA GATE PULSE (SCM GP)
In the direction of allow : CH DOWN Key
In the opposite direction : CH UP Key
SUB-ADJUST mode
SUB-CONTRAST (SUB CON)
SUB-BRIGHT (SUB BRI)
SUB-COLOUR (SUB COL)
SUB-TINT (SUB TIN)
SUB-SHARPNESS (SUB SHP)
SUB-VOLUME (SUB VOL)
In the direction of allow : CH DOWN Key
In the opposite direction : CH UP Key
3-2