Philips BP2.2U Service Manual page 27

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".
• If the content of the error buffer has not changed for 50+
hours, it resets automatically.
5.5.4 Error Buffer
In case of non-intermittent faults, clear the error buffer before
you begin the repair (before clearing the buffer, write down the
Table 5-3 Error code overview
Error Description
2
1 I C1
2
2 I C2
2
3 I C3
2
4 I C4
5 VIPER does not boot
6 5V supply
7 8V6 supply
8 1.2V DC/DC
11 3.3V DC/DC
12 12V supply
14 Supply Class D amplifiers P
14 Supply Audio part SSB
17 MPIF1 audio supply
18 MPIF1 ref freq
25 Supply fault
27 Phoenix
28 MOP
29 AVIP1
31 AVIP2
32 MPIF1
34 Tuner1
37 Channel decoder
39 POD Interface
43 Hi Rate Front End
44 Main NVM
45 Columbus 1
53 VIPER
63 PDP Display
Service Modes, Error Codes, and Fault Finding
Error/Prot Detected by
P VIPER
P VIPER
P Stby µP
P VIPER
P Stby µP
P Stby µP
P Stby µP
P Stby µP
P Stby µP
P Stby µP
Stby µP
P Stby µP
E VIPER
E VIPER
P Stby µP
E VIPER
E VIPER
E VIPER
E VIPER
E VIPER
E VIPER
E VIPER
E VIPER
E VIPER
E VIPER
E VIPER
P Stby µP
P VIPER
BP2.2U, BP2.3U
content, as this history can give you significant information).
This to ensure that old error codes are no longer present.
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 several mechanisms of error detection:
• Via error bits in the status registers of ICs.
• Via polling on I/O pins going to the stand-by processor.
• Via sensing of analogue values on the stand-by processor.
• Via a "not acknowledge" of an I
Take notice that some errors need more than 90 seconds
before they start blinking. So in case of problems wait 2
minutes from start-up onwards, and then check if the front LED
is blinking.
Device Defective module
2
n.a. I C1_blocked
2
n.a. I C2_blocked
n.a. /
2
n.a. I C4_blocked
PNX8550 /
n.a. /
n.a. /
n.a. /
n.a. /
n.a. /
/
/
PNX3000 IF I/O
PNX3000 IF I/O
/
PNX2015B HD subsystem
EP1C6 Output processor
PNX2015 AV input processor 1
PNX2015 AV input processor 2
PNX3000 /
/ Tuner 1
NXT2003 /
STV701 /
TDA9975 HDMI
M24C64 /
PNX2015 Comb filter
PNX8550 /
/ Display
5. EN 27
2
C communication
Result
Protection + 3 Hz blinking
Protection + 3 Hz blinking
Protection + Error blinking
Protection + 3 Hz blinking
Protection + Error blinking
Protection + Error blinking
Protection + Error blinking
Protection + Error blinking
Protection + Error blinking
Protection + Error blinking
Protection + Error blinking
Protection + Error blinking
Error logged
Error logged
Protection + Error blinking
Error logged
Error logged
Error logged
Error logged
Error logged
Error logged
Error logged
Error logged
Error logged
Error logged
Error logged
Protection + Error blinking
Protection + 3 Hz blinking