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Service Mode Adjustments
[Bus Data Adjustment]
Bus
Dat
Adju
stm
ent]
Item 44 [OP1] Option setting-1
Item
m 44
OP1]
Op
The microprocessor used in this model is a multi-purpose
type and is used in several different models. To ensure
proper operation and the correct features for your particu-
lar model, Option setting-1 data must be correct.
(1) Select [OP1] in the service mode.
(2) Set Option setting-1 data to 61.
(3) Exit from the service mode.
Item 01 [H-P] HORIZONTAL CENTRE
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to normal.
(3) Select [H-P] in the service mode.
(4) Change value to be optimum horizontal centre position.
(5) Exit from the service mode.
Item 02 [V-P] VERTICAL CENTRE
m 02 2 [ P] VE E R R TICA A L CEN N TRE
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to maximum.
(3) Select [V-P] in the service mode.
(4) Change value to be optimum vertical centre position.
(5) Exit from the service mode.
Item 03 [V-S] VERTICAL SIZE
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to maximum.
(3) Select [V-S] in the service mode.
(4) Change value to be optimum vertical size.
(5) Exit from the service mode.
on s s etti
1
Horizontal centre
Vertical centre
Vertical size
Item 04 [OSD] OSD POSITION
OSD]
OS
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to normal.
(3) Select [OSD] in the service mode.
(4) Change value to be proper OSD position.
(5) Exit from the service mode.
Item 05 [AGC] AGC
NOTE: Do not attempt this adjustment with weak signal.
(1) Tune the receiver to most clearest (or strongest) VHF
station in your area. Set the brightness and contrast
controls to maximum. Set the colour control to mini-
mum.
(2) Select [AGC] in the service mode.
(3) Change value until the snow noise just disappears.
(4) Exit from the service mode.
Item 06 [VCO] AFT
(1) Connect DC meter to pin-2 of IC201 and the ground.
(2) Tune the receiver to the clearest station.
(3) Disconnect RF input. (Disconnect antenna plug from
the antenna socket.)
(4) Select same channel. (If you have selected channel 03
in step 2, press "0" button next "3" button on the
remote control to select channel 03.)
(5) Connect antenna plug to the antenna socket.
(6) Select [VCO] in the service mode.
(7) Change value until the voltage (on pin-2 of IC201) to
be 4.5±0.2V at OK point.
NG
0
0
VCO DATA
CO DA
(8) Exit from the service mode.
8)
it f
t
-14-
D PO
T
ON
MAIN BOARD
pin-2
(IC201)
OK
4.5V ±
0.2V
255
255
ATA
d
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