5
Service modes, error codes and protections
14
automatically pop-up the schematic with the location of C2568
marked.
Stepwise Startup /Shutdown feature of set can be used via
Compair
Stepwise startup explanation
Via ComPair the stepwise startup (see also chapter 4) can be
realised. This is very helpful when a protection is activated.
Stepwise shutdown explanation
In the stepwise shutdown mode, state 2 is skipped. (ICs can
not be de-initialised).
Note: When set is in stepwise-mode and due to stepping-up a
protection is activated, the set really will go into protection
(blinking red led). The set will not leave the stepwise-mode
however. By stepping up the set can be activated again, until
state X, where protection was activated. At state (X-1)
diagnostic measurements can be performed.
5.3
Error codes
5.3.1
Reading error codes from the error buffer
The error buffer can be read in 2 ways:
1.
On the screen via the Service Alignment Mode (SAM). In
case picture is OK, the error buffer can be read the easiest
via the SAM. In the main menu of the SAM the last 10
different error codes occurred are displayed. The most
recent detected error code is displayed on the left side, so
e.g.: 0 0 0 0 0means no error codes present in the buffer
3 0 0 0 0means one error code present in the buffer; error
code 3 2 3 0 0 0 means two error codes present in the
buffer; error code 2 is the most recent, error code 3 is
detected before 2
2.
On the display of the DST. If an error has been detected by
the MG2.1E chassis, the set might go into protection.
Without the presence of a picture the errors can be read by
the DST, as long as the main-processor is still active
(green LED continuous and red LED blinking fast (5Hz); in
case of red LED is blinking slow (1,25Hz) there is a main-
processor problem). To transmit the errors from the TV to
the DST:
1.
Press the "DIAGNOSE" key (in all modes except the
SAM)
2.
Press "1" to view the last error detected.
3.
Hold the DST 5 to 10 cm from in front of the stand-by
LED of the set (the IR-sending LED of MG2.1E is
located near the stand-by LED).
4.
Press the "OK" key.
The error is represented by a 2 digit number. The 2 digits on the
DST are displayed sequentially, with a pause before it is
repeated. The digit after the pause is the 1st digit. If the display
reads 4 - 7, the error code is 47. To read other error codes,
press "DIAGNOSE" and one of the other digit keys. Note:
–
If the DST cannot communicate to the MG2.1E in a proper
way, ERROR 2 is shown in the display of the DST. Trying
again by changing the DST position a little bit might often
help.
–
If the error buffer of MG2.1E is empty, no errors are
displayed by the DST; the display remains blank.
5.3.2
Clearing the error buffer
The error buffer can be cleared in 2 ways:
1.
In the SAM by selecting the item RESET ERROR BUFFER
in the main menu.
2.
By the "DIAGNOSE 99" command of the DST (in all modes
except the SAM). Press the DIAGNOSE key on the DST,
followed by 9 and 9 and then >.
Note: When error buffer is full (10 codes), no new error can be
stored anymore. However of every error raised is monitored
State
Description mode
Display leds
Errorcode possible
0
Low Power Standby/uC in Stby
Red on
None
1
High Power Standby/set in Stby
Red 0.5Hz
None
2
Supply on. Protections 5V2, 8V6, DC-Prot activated.
Orange/Green 0.25 Hz
67,68,76
3
ICs initialized. (Sound) Protection 3V3 activated
Orange/Green 0.5 Hz
plus 77
4
EHT startup. No blackcurrent stabilisation. Protections VFB,
HFB, LDP, BC-prot activated (blanked picture)
Orange/Green 2 Hz
plus 70,71,73,74
5
TV operates, unblanked picture
Orange/Green 10 Hz
State
Description mode
Display leds (Note *)
Prot. de-activated
5
TV operates, unblanked picture
Orange/Green 10 Hz
-
4
No blackcurrent stabilisation (no picture)
Orange/Green 2 Hz
-
3
ICs stay initialised. (Sound) All protections are off
Orange/Green 0.5 Hz
74,73,71,70
1
High Power Standby/set in Stby
Red 0.5Hz
77,76,68,67
0
Low Power Standby/uC in Stby
Red on
-
