Philips EM5A NTSC Service Manual page 26

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EN 26 5. EM5A NTSC
5.5.3 How to clear the Error Buffer
Use one of the following methods:
• Activate of the 'RESET ERROR BUFFER' command in the
SAM menu.
By pressing the following key sequence on the remote control
transmitter: 'MUTE' - '062599' - 'OK.'
• Transmit the commands 'DIAGNOSE' - '99' - 'OK' with
ComPair.
• If the contents of the error buffer have not changed for 50+
hours, it resets automatically.
5.5.4 Error Codes
If the set has 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 contents, as this history can give you significant
information.
Table 5-3 Error Table
Error Device
1 M24C32
2 Hfail Protection
3 SAA4978
4 Supply 5V
5 Supply 8V
6 Slow I2C bus blocked
7 TDA9330/HOP
8 TDA9320/HIP
12 TDA9178
13 UV1316/ TEDE9
14 MSP3411/3412/3452
15 uPD64083
16 FBX
17 M62320P
18 Fast I2C bus blocked
19 TDA8444
21 M62320P
22 TDA888X
23 TELE9
24 SAB9081
25 Z86130
26 SAA4992
27 T8F24EF
28 Black current loop
Note: Error codes 1, 6, and 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.
Service Modes, Error Codes and Fault Finding
Description
NVM, spontaneous blinking 1-1-1...
Horizontal Flyback protection
PICNIC
5V2 protection
8V6 protection
High-end Output Processor
High-end Input Processor
I/O Expander HD interface
FALCONIC
Eagle
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 (for example, a fault in the
protection detection circuitry can also lead to a protection.)
There are various errors:
2
• I C device errors.
2
• I C bus errors.
• Protection errors.
2
• Errors not related to I
– Black Current Loop Error (error 28): detection of a
continuous failing of the black current stabilization loop
of the HOP.
– FALCONIC Error (error 26): at start-up, after
initialization of the PICNIC, the presence of the
FALCONIC can be checked.
– Eagle Error (error 27): at start-up, after initialization of
the PICNIC, the presence of the Eagle can be
checked.
Def. item Defect. module indication
7011 NVM
7301 HFB protection
7713 PICNIC
5V Protection
8V Protection
Slow I2C bus blocked
7301 HOP video control/geometry B4
7323 HIP I/O-video processing
7302 TOPIC (LTP Peaking)
1200 Tuner Protection
7651 ITT sound processor
7023 3D Combfilter protection
Feature Box Protection
7106 HD Interface
Fast I2C bus blocked
7500 Auto Scavem DAC
7403 PIP I/O Expander
7301 PIP BOCMA
7201 PIP Tuner
7801 PIP Muppet
7501 PIP V-Chip
7718 Falconic
7724 Eagle device
Black current loop
C devices, but of importance:
Diagram
B5
B4
B3a
B5
B5
B5
B2
B4
A8
B6
C0
B3
N1
B5
SC1
C3
C4
C2
C1
C5
B3b
B3c