Service Modes, Error Codes, and Fault Finding
5.
5.
Service Modes, Error Codes, and Fault Finding
Index of this chapter:
5.1 Test Points
5.2 Hotel mode
5.3 Service Modes
5.4 Stepwise Start-up
5.5 Service Tools
5.6 Error Codes
5.7 The Blinking LED Procedure
5.8 Protections
5.9 Fault Finding and Repair Tips
5.10 Software Upgrading
5.1
Test Points
As most signals are digital, it will be difficult to measure
waveforms with a standard oscilloscope. However, several key
ICs are capable of generating test patterns, which can be
controlled via ComPair. In this way it is possible to determine
which part is defective.
Perform measurements under the following conditions:
•
Service Default Mode.
•
Video: Colour bar signal.
•
Audio: 3 kHz left, 1 kHz right.
5.2
Hotel mode
Before the service modes can be activated, the set needs to be
switched into
normal consumer mode
(MTV-Mode) first. Use
an iTV setup remote control (type: RC2573/01, 12nc:
3139 228 88782) to key in the code ‘024995’ (slowly) directly
followed by the MENU button. The text messages “TV Is Now
In MTV Mode” and “Please Do A Cold Start!” appears on the
screen. Disconnect the set for a few seconds from the mains
supply, reconnect the set to the mains supply again. The set is
now in the normal consumer mode (MTV-Mode).
After repair, place the set into
hotel mode
(iTV-Mode) again.
Key-in the same code on the remote control as described
above. The text message “TV Is Now In ITV Mode” appears. A
cold start must be performed as described above. The set is
now in the hotel mode (iTV-Mode) again.
5.3
Service Modes
Service Default mode (SDM) and Service Alignment Mode
(SAM) offers several features for the service technician, while
the Customer Service Mode (CSM) is used for communication
between the call centre and the customer.
This chassis also offers the option of using ComPair, a
hardware interface between a computer and the TV chassis. It
offers the abilities of structured troubleshooting, error code
reading, and software version read-out for all chassis.
(see also section
).
5.3.1
Service Default Mode (SDM)
Purpose
•
To create a pre-defined setting, to get the same
measurement results as given in this manual.
•
To override SW protections detected by stand-by
processor and make the TV start up to the step just before
protection (a sort of automatic stepwise start up). See
section
•
To override SW protections detected by MIPS. See also
section
•
To start the blinking LED procedure (not valid for
protections detected by stand-by software).
Specifications
Table 5-1 SDM default settings
•
All picture settings at 50% (brightness, colour, contrast).
•
All sound settings at 50%, except volume at 25%.
•
All service-unfriendly modes (if present) are disabled, like:
–
(Sleep) timer.
–
Child/parental lock.
–
Picture mute (blue mute or black mute).
–
Automatic volume levelling (AVL).
–
Skip/blank of non-favourite pre-sets.
How to Activate SDM
For this chassis there are two kinds of SDM: an
analogue
SDM
and a
digital
SDM
. Tuning will happen according table “SDM
Default Settings”.
•
Analogue
SDM
: use the standard RC-transmitter and key
in the code “062596”, directly followed by the “MENU”
button.
Note:
It is possible that, together with the SDM, the main
menu will appear. To switch it “off”, push the “MENU”
button again.
•
Digital
SDM
: use the standard RC-transmitter and key in
the code “062593”, directly followed by the “MENU” button.
Note:
It is possible that, together with the SDM, the main
menu will appear. To switch it “off”, push the “MENU”
button again.
•
Analogue
SDM
can also be activated by shorting for a
moment the two solder pads [1] (see
) on the
SSB, with the indication “SDM”. Activation can be
performed in all modes, except when the set has a problem
with the Stand-by Processor.
Figure 5-1 Service mode pads
After activating this mode, “SDM” will appear in the upper right
corner of the screen.
How to Navigate
By pressing the “MENU” button on the RC transmitter, the set
will toggle between the SDM and the normal user menu (with
the SDM mode still active in the background).
Region
Freq. (MHz)
Default
system
Europe, AP(PAL/Multi)
475.25
PAL B/G
Europe, AP DVB-T
546.00 PID
Video: 0B 06 PID
PCR: 0B 06 PID
Audio: 0B 07
DVB-T
1
8
6
8
0_201_090
8
25.ep
s
090
8
25
2
S
PI
1
S
DM
1
S
DM
