Testpoint Overview Lsp & Crt/Auto Scavem - Philips EM5.1E Service Manual

5.5.3
How to clear the Error Buffer
Use one of the following methods:
•
By activation of the "RESET ERROR BUFFER" command
in the SAM menu.
•
With a normal RC, key in sequence "MUTE" followed by
"062599" and "OK".
•
When you transmit the commands "DIAGNOSE" - "99" -
"OK" with ComPair (or with a DST).
•
If the content of the error buffer has not changed for 50+
hours, it resets automatically.
5.5.4
Error Codes
In case of non-intermittent faults, clear the error buffer before
you begin the repair. This to ensure that old error codes are no
longer present. Before clearing the buffer, write down the
content, as this history can give you significant information.
Table 5-3 Error codes
Error Device
1 M24C32
2 Hfail Protection
3 SAA4978
4 Supply 5V
5 Supply 8V
6 Slow I2C bus blocked
7 TDA9330
8 TDA932x
9 PCF8574
13 UV1318/...
14 MSPxxxx
16 FBX
18 Fast I2C bus blocked
19 TDA8444
21 M62320P
22 TDA888X
23 TELE9
24 SAB9081
26 SAA4992
27 T8F24EF
28 Black current loop
32 M29W400BT
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 = 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),
Service Modes, Error Codes, and Fault Finding
Description
NVM, spontaneous blinking error 1
Horizontal Flyback protection
PICNIC
5V protection
8V protection
Spontaneous blinking error 6
HOP High-end Output Processor
HIP High-end Input Processor
Wireless expander
Tuner protection
ITT sound processor
Feature Box Protection
Spontaneous blinking error 18
Auto Scavem DAC
PIP I/O Expander
PIP BOCMA
PIP Tuner
PIP Muppet
Falconic
Eagle
Black current loop
Flash Ram (EPG)
EM5.1E
If possible, check the entire contents of the error buffer. In
some situations, an error code is only the result of another error
code and not the actual cause (e.g., a fault in the protection
detection circuitry can also lead to a protection).
There are various errors:
•
I2C device errors.
•
I2C bus errors.
•
Protection errors.
•
Errors not related to an I2C device, but of importance:
–
BLACK CURRENT LOOP (ERROR 28): detection of a
continuous fail of the black current stabilisation loop of
the HOP.
–
FALCONIC (ERROR 26): at start-up, after initialisation
of the PICNIC, the presence of the FALCONIC can be
checked.
–
EAGLE (ERROR 27): at start-up, after initialisation of
the PICNIC, the presence of the Eagle can be
checked.
Def. item Defect. module indi-
cation
7011 Control
/ Horizontal Flyback
7713 Feature Box
/ +5V Supply
/ +8V Supply
/ Slow I2C Blocked
7301 Video Controller
7323 Chroma IF IO
7501 Sound Output
1T01 Tuner
7A02 Audio module
/ +3V (Fbx) Supply
/ Fast I2C Blocked
7500 Auto Scavem
7403 Video Dual Screen
7301 Video Dual Screen
7201 Video Dual Screen
7801 Video Dual Screen
7718 +3V (Fbx) Supply
7724 +3V (Fbx) Supply
/ Video Controller
7012 EPG Memory
•
When all the error-codes are displayed, the sequence
finishes with a LED blink of 3 s,
•
The sequence starts again.
Example: Error 12 9 6 0 0.
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: If errors 1, 6 or 18 occur, the LED always gives the last
occurred error even if the set is NOT in service mode.
5.6.2
How to Enter
Use one of the following methods:
•
Enter the SDM (only via soldering pads marked "SDM" on
SSB). The blinking red front LED will show the entire
5. EN 27
Diag
B5a
/
B3a
B5a
B5a
/
B4
B2
H
A8
B6a
B3
/
SC1
C3
C4
C2
C1
B3b
B3c
/
B5a