Abgleich / Alignment
DIGI 100
2 - 4
GRUNDIG Service
GB
Alignment
All adjustment controls not mentioned in this description are adjusted during production and must not be re-adjusted in the case of repairs.
Call up the service menu:
Button "
Ǻ
" (EASY DIALOG)
Call up the dialogue line:
Buttons "
P+
" or "
P-
" –> "OK"
Change setting in the dialogue line:
Buttons "
L+
" or "
L-
" –> "OK"
Back to previous menu:
"
blue
" button
Exit menu:
Button "
Ǻ
"
Service menu for the dealer (code no.): "
8500
"
Measuring instruments:
100MHz oscilloscope with 10:1 test probe,
digital voltmeter, colour test pattern generator
Checks and adjustments after replacement or repair of:
- Chassis:
alignment 1
- Signal module:
alignment 2
- CIC31010
(signal module)
:
alignment 2, 15
- PIP/signal module:
alignment 3, 4
- CIC80230
(feature module)
:
alignment 5…11
- Horizontal deflection:
alignment 12, 13, (14)
1.
+A
voltage
+M
voltage
2.
Tuner AGC
(signal module)
3.
Tuner AGC/PIP
(PIP/signal
module)
4.
PLL demodu-
lator circuit for
38.9MHz
picture carrier
(PIP/signal
module)
PLL demodu-
lator circuit for
33.4MHz
picture carrier
(PIP/signal
module)
5.
Colour match
6.
Channel position-
related noise
reduction
Programme
positions
1…199
It is absolutely necessary to check and re-adjust these
voltages if necessary after every repair and before
every alignment.
Digital voltmeter
:
D61516 / cathode
Brightness:
Minimum
Call up the "Copy path" menu via "EASY DIALOG" –>
"Settings" –> "Copy".
Digital voltmeter
:
D61524 / cathode
Connect the 100MHz oscilloscope to the tuner contact 10
or 11 and to tuner ground.
Feed in a test pattern (sound carrier switched off) via the
aerial, 70…80dB
µ
V.
Call up the "AGC setting" menu via "EASY DIALOG " –>
"Installation" (to page 2) –> "Dealer service menu" –>
"8500" –> "Special functions".
Connect the 100MHz oscilloscope to the tuner contact 10
or 11 and to tuner ground.
Feed in a test pattern (with sound carrier switched off) via
the aerial, 70…80dB
µ
V.
Display a PIP picture.
Feed in a transmitter signal with standard channel spacing,
Band 1 (B/G).
Tune the set to a transmitter with "00" finetuning.
Display a PIP picture.
Voltmeter:
IC32110-22.
Voltmeter:
IC32110-11.
Feed in a transmitter signal with standard channel spacing,
Band 1 (L`).
Tune the set to a transmitter with "00" finetuning.
Display a PIP picture.
Voltmeter:
IC32110-22.
Voltmeter:
IC32110-11.
Call up the "Colour match" menu via "EASY DIALOG" –>
"Installation" –> "Special functions" (to page 2).
Call up the "Noise reduction" menu via "EASY DIALOG" –>
"Settings" –> "Picture" (to page 2) .
Call up the "Noise reduction P. 1…199" menu via "EASY
DIALOG" –> "Installation" –> "Special functions".
Use the
R61508
control to adjust the value according to the
table (page 3-15).
Set the copy path to "
on
", press the
"Standby"
button (the
high voltage is switched off). The operating LED lights
"orange".
Use the
R61572
control to adjust
17.2V
.
Set the AGC to
300-350mV
pp
.
Use the RV
R32122
control to set
300-350mV
pp
on the
PIP/signal module.
Determine the exact operating voltage
UB
.
Set half the operating voltage
UB/2
with
F32085
on the
PIP/signal module (29504 212 0400).
Determine the exact operating voltage
UB
.
Adjust half the operating voltage
UB/2
with
R32334
on
the PIP/signal module (29504 212 0400).
Optimize existing run time differences between the Y and
chroma signals. The
channel positions 1…199
are
optimized
at the same time
.
Set the noise reduction ("off", "low", "automatic", "high")
for
every channel position
.
Set the noise reduction ("manual", "off", "low", "automatic")
for the channel positions 1…199 at the same time
.
Alignment
Preparations
Alignment procedure
