Specifications
Service Modes, Error Codes and Fault Finding
GB 29EM3E 5.
Figure 5-9
Note: Error codes 1, 6 or 18 are protection codes and in this
case, supplies of some circuits will be switched off. Also in
protection, the LED will blink the number of times equivalent
to the most recent error code.
5.6 The Blinking LED Procedure
5.6.1 Introduction
Via this procedure, you can make the contents of the error
buffer visible via the front LED. This is especially useful for
fault finding, when there is no picture.
When the SDM is entered, the front LED will show (blink) the
contents of the error-buffer. Error-codes
³ 10 are shown as
follows:
– a long blink of 750 ms (which is an indication of the
decimal digit),
– a pause of 1.5 s,
– n short blinks (where n = 1 - 9),
– when all the error-codes are displayed, the sequence
finishes with a LED blink of 3 s,
– the sequence starts again.
Example: Error 129600.
After activation of the SDM, the red front LED will show:
– 1 long blink of 750 ms (which is an indication of the
decimal digit) followed by a pause of 1.5 s,
– 2 short blinks followed by a pause of 3 s,
– 9 short blinks followed by a pause of 3 s,
– 6 short blinks followed by a pause of 3 s,
– 1 long blink of 3 s to finish the sequence,
– the sequence starts again.
Note 1: Iferrors1,6or18occur,theLED
always
gives the
last occurred error even if the set is NOT in service mode.
Note 2: If on the DST the text 'ERROR 2' is displayed, the
communication from the TV to the DST has failed.
5.6.2 How to Enter
Use one of the following methods:
• Enter the SDM. The blinking red front LED will show the
contents of the error buffer (this works only in ‘normal
operation’ mode).
• Transmit the commands ‘DIAGNOSE’ - ‘0’ - ‘OK’ with a
DST/ComPair (this works both in ‘Standby mode’ and
‘protection’ mode). The complete error buffer is shown.
• Via the ‘DIAGNOSE’ - ‘X’ - ‘OK’ function on the DST/
ComPair (where X is a number between 1 and 5):
1. Press the ‘DIAGNOSE’ button on the DST (possible
in all modes except SAM).
2. Press ‘1’ to view the last detected error (or ‘2’,etc.to
show the errors before).
3. Press the ‘OK’ button. The red front LED will now
give the requested error.
5.7 Protections
5.7.1 Introduction
The EM3E has only one micro-processor (OTC), which
remains active during Standby. This because power of the
microprocessor and the attached memory chip set is coming
from the 3V3 supply, which is derived from the 5V Standby-
circuitry (via stabiliser 7005). So in both Power-on as in
Standby mode the microprocessor is connected to this power
supply.
If a fault situation is detected, an error code will be generated
and if necessary, the set is put in protection mode. The
protection mode is indicated by the blinking of the red front
LED at a frequency of 3 Hz (or by a coded blinking in special
cases). In some error cases however, the micro processor
does not put the set in the protection mode (this is the case
with the - hardware - loudspeaker protection of the audio
amplifier).
Error Device Description Defective item Diagram Defect. module indication
1
ST24E32 NVM, spontaneous blinking
1-1-1..
7011 B5 Control
2
H fail protection HFB Horizontal Flyback
Or HW-protection due to:
- ARC_PROT
- BRIDGE_PROT
- NON_VFB PROT
3
SAA4978 PICNIC 7709 B3 Feature Box
4
Supply 5 V 5V2 protection B5 +5 V Supply
5
Supply 8 V 8V6 protection B5 +8 V Supply
6
Slow I
2
C-bus blocked Slow I
2
C-bus blocked,
spontaneous blinking 6-6-6..
Slow I
2
C blocked
7
TDA9330 HOP video control/geometry 7301 B4 Video Controller
8
TDA9320 HIP I/O video processing 7323 B2 Chroma IF IO
9
PCF8574 Wireless expander
10
Reserved
11
Reserved
12
TDA9178 LTP Peaking Video Controller
13
UV1316/TEDE9 Tuner U1200 A8 Tuner
14
MSP34xx Sound processor + Dolby 7651 B6 Audio Module
15
Reserved
16
Featurebox protection Featurebox protection B3 +3 V (FBX) supply
17
Reserved
18
Fast I
2
C-bus blocked Fast I
2
C-bus blocked,
spontaneous blinking 18-18-
18..
Fast I
2
C blocked
CL 16432044_038.eps
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