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G
Service adjustments
Note! Before other adjustments U1 voltage must be adjusted.
Service mode
Select the service mode by pressing the Mute, OK (M) and TV-buttons on
the remote control unit.
Use the cursor button a or b to select required adjustment and adjust it
by using the cursor buttons d and c.
Store the settings by pressing the red OK-(M) button.
Return to normal TV mode by pressing the TV-button.
Service adjustments which are made in service mode
Display
Note
V.MID-POS.
Adjust centre of the test picture vertical to
a centred pos. (bottom half is black).
V.TOP-POS.
Adjust top edge (bottom half is black).
V.AMPL.
Adjust bottom edge.
H.SHIFT
Adjust centre of the test picture horizontal
to a centred position.
H.AMPL.
Horizontal amplitude
P.AMPL.
Horizontal cushion
P.TILT
Horizontal trapeze
P.CORN.
Corner correction (starting SPL21 R 02)
S.COR.
Vertical linearität (starting SPL21 R 02)
GREEN
See adj. "G2- and colour temperature"
BLUE
See adj. "G2- and colour temperature"
RED
See adj. "G2- and colour temperature"
MAX APSI PROGRAM
Starting SPL40 R 01
OSD SHIFT
INVAR:
(ON/OFF) starting SPL50 R 01
FRONT AV:
(ON/OFF)
LOUDNESS:
(ON)
C4 BIT CHECK:
(ON)
NICAM:
(ON/OFF)
CARRIER-MUTE:
(OFF)
VT CHAR:
West / East1 / West Turkey / East2
FLYB MODE:
(ON=NTSC) as from SPL21 R 02
AGC
See adjustment "AGC".
ZOOM
(ON/OFF)
CORING
(ON/OFF)
G2- and colour temperature
1. Set the TV set to the service mode (see "Service mode").
2. Adjust the green, blue and red OSD values to 60 with the cursor button
d or c.
3. Set the G2 trimmer (RK60) to its centre position.
4. Adjust the brightness to normal level (black bar of the grey scale is
black).
5. By using an oscilloscope (Probe 100:1) determine the highest black
value at the picture-tube cathodes (R, G, B).
6. Adjust with G2 (RK60) the highest black value to 150 V.
7. Use a colour neutral picture and adjust the light areas in green, blue and
red drives to white (lower the OSD value) with the cursor button d or c.
At least one of the level controls should be remain at 60.
8. Store the adjustments in the memory by pressing the OK (M) button.
9. Return to normal TV mode by pressing the TV button.
AGC
1. Feed in a RF signal (70 dBµV) tuned on a mid range UHF channel and
without sound carrier) via the aerial input.
2. Set the TV set to the service mode (see "Service mode").
3. Select the AGC-adjustment with the cursor button a or b.
4. Connect an oscilloscope (bandwidth > 50 MHz) to the IF output on the
tuner (TL01 or TL02).
5. Press the yellow button on the remote control unit (OSD = OKAY).
6. Adjust the signal to 450 mVpp ± 50 mV. (with reference to the signals
synchronizing peaks) with the cursor button d or c.
7. Store the value in the memory by pressing the red OK (M) button.
8. Return to normal TV mode by pressing the TV button.
U1 voltage
1. Set the contrast and brigthness to minimum.
2. Connect an universal voltmeter to the on the capacitor CO43.
3. Adjust the U1 voltage to 150 V ± 0.5 V (110° 25"/28"), 130 V ± 0.5V
(90° 21") or 120 V ± 0.5V (90° 17") with the trimmer RO80 by black
picture.
Focus
Adjust the focus to optimum with the focus trimmer (RK60).
Other service adjustments
Picture reference calibration
1. Press the PROG button (RCF.. Remote Control).
1. Press the blue MENU button twice (RCN..Remote Control).
2. Activate TV-PROGR option by pressing the cursor button d or c.
3. Enter one of the mid range UHF channels by using the number buttons,
e.g. ch. 38 (607.25 MHz).
4. Select the frequency tuning menu by pressing the green button.
5. Select AFC option and change it to ON by using the cursor buttons
d or c.
6. Adjust the frequency to 607.25 MHz with ZL22 (even with other
channels, always set to xxx.25 MHz).
7. Return to normal TV mode by pressing the TV button.
Audio IF calibration
1. Feed in a test picture.
2. Connect an oscilloscope to pin 12 of TDA 2545.
3. Adjust for minimum picture content with the ZL02.
AGC (Multistandard TV sets)
1. Feed in a RF signal (>5 mV) tuned on a mid range UHF channel and
without sound carrier via the aerial input.
2. Connect an oscilloscope (bandwidth >50 MHz) to the IF output of the
tuner (TL01 or TL02).
3. Adjust the signal to 450 mVpp ±50 mV (with reference to the signals
synchronizing peaks) with the trimmer RL217 (located on the
multistandard module).
Picture reference calibration (Multistandard TV sets)
BG, DK, I, L standard
1. Press the PROG button (RCF.. Remote Control).
1. Press the blue MENU button twice (RCN..Remote Control).
2. Activate TV-PROGR option by pressing the cursor button d or c.
3. Enter one of the mid range UHF channels by using the number buttons,
e.g. channel 38.
4. Connect an universal voltmeter to the TP205.
5. Adjust the DC voltage for 2.5 V with the LL221 (located on the
multistandard module).
6. Return to normal TV mode by pressing the TV button.
L' standard
1. Press the PROG button (RCF.. Remote Control).
1. Press the blue MENU button twice (RCN..Remote Control).
2. Activate TV-PROGR option by pressing the cursor button d or c.
3. Select the frequency tuning menu by pressing the green button.
4. Enter one of the mid range channels on band 1 by using the number
buttons, e.g. channel C (63.75 MHz).
5. Connect an universal voltmeter to the TP205.
6. Adjust the DC voltage for 2.5 V with the RL286 (located on the
multistandard module).
7. Return to normal TV mode by pressing the TV button.
Service Mode:
Mute, OK (M), TV
2
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1
4
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9
0
OK (M)
M
SOUND
VISION
EXTRA
i
TV
TV
IDEAL
TEXT
UPD
SIZE
STOP
PROG
Mute
Service Mode:
Mute, OK (M), TV
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2
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4
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6
9
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8
0
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r
IDEAL
Mute
TV
OK (M)
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