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
- CIC
31010 (
signal module): alignment 2, 15
- PIP/signal module: alignment 3, 4
- CIC
80230 (
feature module): alignment 5…11
- Horizontal deflection: alignment 12, 13, (14)
1.
+A 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
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 3-19).
Set 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 (295042120400).
Determine the exact operating voltage UB.
Adjust half the operating voltage UB/2 with R32334 on
the PIP/signal module (295042120400).
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
