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Service Adjustments of Picture Geometry
and Picture Position
For accurate adjustment a test generator or a transmitted test pattern
must be used. For raster correction the built-in test pattern can also be
used.
Sequence of operation from the Telepllot (remote control):
1. Call up the programme menu with button "i". The indication 'Info
Center' is shown on the screen.
2. Call up the Service/Demo programme with button "P" (line
appears red).
3.
Enable with button "OK". The information "System Setup" is
shown on the screen.
4.
Callup Service Demo with button "AUX".
5.
Call up Service Mode with button "P*.
6.
Depress the "OK" button and enter the number code 8500.
7. Call up the Geometry Alignment function with button "AUX".
8. Whenno transmitted test pattem is available, move the yellow bar
with the cursor buttons to the "Test Pattern" field and switch on the
built-in test pattern.
9.
Move the yellow bar with the cursor buttons to the requested
alignment item, eg. "Picture Height".
10. Depress the button "OK".
11. With the cursor positioning functions "+" or *-" adjust for an opti-
mum picture.
12. For storing this value close the jumper at pin 2, |C 360 or connect
contact 1 of the plug "BB" to chassis. Call up the yellow bar with
button 'i*, set it to the field "Store" and depress the button "OK".
Attention! The picture geometry is set to the stored value when-
ever the receiver is switched on.
Basic Values:
Under the field "Basic Values" the optimum picture geometry align-
ment data of the receiver has been stored in production.
If the geometry has been aligned wrongly during repair work, these
basic values can be loaded again at any time as described under point
For this purpose, set the yellow bar to the field "Basic Values". Depress
button "OK". When pressing the "OK" button once again the basic
values for the "Picture Geometry" are selected. See point 12 for storing
the data.
13. Return to normal selection mode with the button "i*.
The column "Alignment List DDC, DMSD, DSD" contains internal data
available only for production purposes.
Removing the Electronic Lock ("Security
System")
For clearing the function "PROGRAMME locked" enter the following
code with the teletext (videotext ) buttons on the remote control:
VIDEOTEXT - PAGE - CANCEL - PAGE - OK
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Service Mode Programme
In this fault finding programme the microprocessor in the operating
control unit calls up the individual modules which are connected to the
l?C bus and indicates them in the form of a code number on the display.
if no acknowledgement occurs the module or peripheral unit is defec-
tive (eg. connection is interrupted, no operating voltage). With a
receiver which is defective due to a breakdown of the ICs driven by the
l?C bus very fast fault location can be carried out by calling up the
following fault finding programme:
1. Switch off the receiver with the mains switch.
2. When the receiver is switched on with the mains switch, depress
and hold the search button " >» " on the operating control unit.
Three points ... appear in the display.
After approx. 5 seconds a code, eg. "E02" will be indicated in the
display if a fault is found.
The defective plug-in module or peripheral unit can be established
from the fault table; "E02" is the IF memory. Additional faults which
are possible, can be indicated by depressing the "+" button on the
operating control unit.
If no additional faults are indicated, the display shows "P 1".
3.
If no fault is found in the l2?C bus communication the display shows
three points ... when the receiver is switched on, and after 5
seconds "P1".
Indication
"E 01" —> NVM (digital store; SDA 3526, IC 360; chassis)
no ack
"E 02" --> NVM 1 (IF memory; SDA 3526)
no ack
"E 03" —> NVM 2 (tuner memory; SDA 2586, 24 C 16
no ack
"E 04" -> DDC (Feature Box; SDA 9064)
no ack
"E 05" —> DMSD (Feature Box; SAA 9051)
no ack
"E 06" --> DSD (Feature Box; SAA 9056)
no ack
*E 07" --> PLL (tuner; SDA 3202)
no ack
"E 08" --> stereo sound (IF; TDA 6611)
no ack
"E 09" --> MSC (Feature Box; SDA 9099)
no ack
"E 10° --> MOIF (Feature Box; SDA 9093)
no ack
"E 11" --> DA converter (encoder; TDA 8442, IC 940)
no ack
"E 12" --> VT Mil (Feature Box; SDA 9090)
no ack
"E 14" --> VTP (VT decoder; SDA 9241)
no ack
Emergency Data Base
This receiver is fitted with a non-volatile memory (IC 360) in which al:
important parameters, such as, eg. colour decoder data or picture
geometry, are stored.
In case of a fault or altered data of this IC it is possible to load 4
complete programme with average values from the EPROM of the
operating control unit into the Feature Box. When carrying out
services this provides a means of establishing a possible fault in the
Feature Box.
Emergency Data Base Storage
Depress and hold the Fine Tuning button and switch the receiver on
with the mains button. By this action the average values of the colour
decoder data and picture geometry are read from the operating
control into the Feature Box. Select the Service Mode Programme, set
the bar to field "Basic Values" and store with the "OK" button.
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