Service And Special Functions - Grundig CUC 1836 Service Manual

CUC 1836 / 1929

Service and Special Functions

GB
1. Switching-on Options
1.1 ATS Reset
Press and hold button "L+" on the TV and switch the mains button "ON".
- Default values are loaded
a) either the optimum analog values stored in the factory or
b) analog values read out from the EPROM IC80060
- ATS bit is set. This option starts the ATS europlus function the next
time the TV is switched on. The previous programme allocations
(channels) are cleared.
1.2 ATS Start
In the menu –> "Adjust language on screen" –> "Adjust country" –>
press the "OK" button, the Auto Tuning System (ATS) starts.
The ATS system scans the frequencies in upward direction, indicat-
ing the channel. When setting the country "F" or "others", the display
mode can be changed optionally to indicate either the channel or the
frequency.
The ATS system determines the station identication or ACI signal.
When finding an ACI station, ATS search is stopped, the ACI data is
taken over and entered into the station table. When changing from
ATS to ACI it is possible during a period of 5sec to stop the ACI
function with the button "TXT".
Pressing the "TXT" or " " button stops the ATS function.
Additionally, for the programmes 1...99, the volume offset is reset and
the default values for "Lumadelay" and "Peaking" are stored together
with the Peri-bit for the respective country.
1.3 Loading the Average Values / Emergency Data Set (ROM Data)
This is only possible once on replacement of the NVM or
After replacement of IC80065/IC80070 (NVM) the TV must be started
with the emergency data set.
Press and hold the "P-" button on the TV and switch on with the mains
button.
In doing so, the parental lock is deactivated and the following data is
read out from EPROM IC80060 and loaded into the non-volatile
memories IC80065/IC80070:
IC80070: (specific TV data, can be set via the Dialog Center):
- picture geometry
- cut-off green and blue (white balance)
- AFC value
- OSD position and PIP position, vertical and horizontal
- production data
IC80065:
- special functions, can be set via the Dialog Center, (ATS with
language and country, switching on with AV, frequency bit, AV1 or
AV2 S-socket, indicator bars, Megalogic indication, format switch-
over and picture format, AVL, picture tube)
- analog values (e.g. brightness, volume, colour saturation,
bw-contrast)
- Perfect Clear
- VPC3210, VPC3211
- blue screen
- economy switch
- security
- picture and sound settings
1.4 IC80065 and CIC3830 Memory Allocation
Further entries into IC80065 and IC3830 (SAT Module) are made
manually or via the ATS system.
IC80065:
- Last Power mode
- Frequency, channel number, station ident, Peri, finetuning, TV
standard, luma, noise, text/menu, reversal point, volume fine
- SAT ident, video data (deviation, H/V), audio frequency high and low
- last AV position (AV1...4) and last programme
- tint
- socket configuration
- PIP data
- record programme and record timer
GRUNDIG Service
CIC3830:
- SAT ident, Peri, finetuning, channel number
- audio frequency high/low, video data (deviation, H/V)
- luma, noise, TV standard, text/menu
- volume fine, sound peak
- station ident
- LNC frequency
1.5 Service Mode Programme (for fault finding in the I
These error messages refer only to interferences in the I
to those modules or integrated circuits which do not return an Acknowl-
edge bit via the I
operating voltage present on the module, that there is a break in the
circuit path or that the I
1.5.1 I C Bus, IC Test
2
In this fault finding programme, the microprocessor IC80050 scans the
individual modules or circuits connected to the I
them on the oscilloscope as a countable pulse sequence (see figure).
1. Connect a double-beam oscilloscope to the I
the oscilloscope.
2. Press and hold "P +" on the TV and switch on with the mains button.
The number of data pulses indicates the defective module as shown
in the table.
With button "L+" on the TV it is possible to find out further defective
interfaces.
If there is no fault in the I
SCL cannot be synchronised on the screen.
Interface
°
P.
S-DDC
MSC
VPC
CIP
Tuner (SAT or terr.)
Video Matrix
NVM 24C08
NVM 24W02
DP
RGB Processor
Audio Processor
SDA
100° s
100° s
SCL
100° s
1.6 Resetting Volume Offsets
Depress and hold the "AUX" button on the remote control handset and
switch on with the mains button. All volume offsets are reset to "0".
1.7 Calling up the SERVICE Menu "for authorised dealer"
Depress and hold the " " button on the remote control handset and
switch on with the mains button. With this menu it is possible for the
dealer to adjust the television receiver.
1.8 Parental Lock (electronic programme lock)
To cancel your personal code number enter "7 0 3 8" in this order.
1.9 EPROM Version Number
Press button " " to call up the "DIALOG CENTER" –> OK. Button "AUX"
shows the version number of the EPROM.
1.10 PIP Position (only with retrofitted PIP Module)
Depress and hold the "PIP" button on the remote control handset and
switch on with the mains button to call up the PIP Mode. Following the
menu guide the PIP position can be changed with the buttons
and stored with "OK".
Note: VGA- or RGB signals cannot be inserted as a PIP picture.
Allgemeiner Teil / General Section
C bus, for example to indicate that there is no
2
C interface is defective.
2
2 C bus and indicates
C bus, trigger "SCL" on
2
C bus communication the pulses SDA and
2
Number Defective
of Clocks Module / Integrated Circuit
1 IC1410, Feature Box
2 IC1690, Feature Box
3 IC1350, Feature Box
4 IC1360, Feature Box
8 CIC2161, Signal Module
10 IC43080, Chassis
15-18 IC80065, Chassis
19 IC80070, Chassis
20 CIC1640, Feature Box
21 IC34510, Chassis
22 IC32300, Chassis
100° s
1 2 n
10ms
C bus)
2
2 C bus, that is
1
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