Philips EM5E AA Service Manual page 31

Table 5-3 Error Table
Error Device
1 M24C32
2 Hfail Protection
3 SAA4978
4 Supply 5V
5 Supply 8V
2
6 Slow I C bus blocked
7 TDA9330/HOP
8 TDA9320/HIP
9 PCF8574
11 Reserved
12 TDA9178
13 UV1316/ TEDE9
14 MSP3411/3412/3452
15 Reserved
16 FBX
17 Reserved
2
18 Fast I C bus blocked
19 TDA8444
26 SAA4992
27 T8F24EF
28 Black current loop
30 PCF8574T/PCF8584T
31 --
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),
– 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:
Service Modes, Error Codes and Fault Finding
Description
NVM, spontaneous blinking 1-1-1.. 7011
Horizontal Flyback protection
PICNIC
5V2 protection
8V6 protection
High-end Output Processor
High-end Input Processor
Wireless Expander
FALCONIC
Eagle
only for DVD models
only for DVD models
Flash Ram (EPG)
EM5E
Def. item Defect. module indication
NVM
7301 HFB protection
7713 PICNIC
5V Protection
8V Protection
7301 HOP video control/geometry B4
7323 HIP I/O-video processing
7501 Wireless Expander
7302 TOPIC (LTP Peaking)
1200 Tuner Protection
7651 ITT sound processor
Feature Box Protection
7500 Auto Scavem DAC
7718 Falconic
7724 Eagle device
Black current loop
7150 DVD Interface
DVD Engine
7012 Flash Ram (EPG)
• Enter the SDM (only via soldering pads marked 'SDM' on
SSB). The blinking red front LED will show the entire
contents of the error buffer (this works in 'normal operation'
mode and in 'protection' mode).
• Transmit the commands 'MUTE' - '062500' - 'OK' with a
normal RC. The complete error buffer is shown. This works
only in 'protection' mode.
• Transmit the commands 'MUTE' - '06250x' - 'OK' with a
normal RC (where 'x' is a number between 1 and 5). When
x= 1 the last detected error is shown, x= 2 the second last
error, etc.... This works only in 'protection' mode.
5.7 Protections
5.7.1 Introduction
The EM5E has only one microprocessor (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. 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 microprocessor does not put
the set in the protection mode (this is the case with the -
hardware - loudspeaker protection of the audio amplifier).
The content of the error buffer can be read via the service menu
(SAM), the blinking LED procedure or via DST/ComPair. The
DST/ComPair 'diagnose' functionality will force the set into the
'Service Standby', which is alike the usual Standby, however
the microprocessor remains completely in normal operation.
To get a quick diagnosis, the EM5E has three service-modes
implemented:
• The Customer Service Mode (CSM).
• The Service Default Mode (SDM). Start-up of the set in a
predefined way.
5. EN 31
Diagram
B5
B4
B3a
B5
B5
B5
B2
H
B4
A8
B6
B3
B5
SC1
B3b
B3c
B5