The Blinking Led Procedure - Philips L04HU Service Manual

Table 5-2 Error code overview
Error Device Error description
0 Not applicable No Error
1 Not applicable X-Ray/Over-voltage protection (US only)
2 Not applicable High beam (BCI) protection
3 Not applicable Vertical guard protection
4 Tuner I2C error while communicating with 2nd tuner
5 Not applicable +5v protection
6 I2C bus General I2C error
7 Not applicable -
8 Not applicable -
9 24C16 I2C error while communicating with the EEPROM
10 Tuner I2C error while communicating with the PLL tuner
11 TDA6107/A Black current loop instability protection
12 SDA9488X I2C error while communicating with the PIP processor
13 Not applicable -
14 DVD Loader I2C error while communicating with the DVD Interface module
15 TDA9178T/N1 I2C error while communicating with LTI module
16 TDA9887 I2C error while communicating with PIP_Demodulator
17 Not applicable -
18 Not applicable -
19 TDA1200x I2C error while communicating with SSD stereo sound decoder 7200
20 TDA1200x I2C error while communicating with video cosmic in Hercules IC 7200
5.6

The Blinking LED Procedure

Using this procedure, you can make the contents of the error
buffer visible via the front LED. This is especially useful when
there is no picture.
When the SDM is entered, the front LED will blink the contents
of the error-buffer:
•
When all the error-codes are displayed, the sequence
finishes with a LED blink of 1.5 seconds,
•
The sequence starts again.
Example of error buffer: 12 9 6 0 0
After entering SDM, the following occurs:
•
1 long blink of 5 seconds to start the sequence,
•
12 short blinks followed by a pause of 1.5 seconds,
•
9 short blinks followed by a pause of 1.5 seconds,
•
6 short blinks followed by a pause of 1.5 seconds,
•
1 long blink of 1.5 seconds to finish the sequence,
•
The sequence starts again at 12 short blinks.
5.7
Protections
If a fault situation is detected, an error code will be generated;
and, if necessary, the television set will go into protection
mode. Blinking of the red LED at a frequency of 3 Hz indicates
the protection mode. In some error cases, the microprocessor
does not put the set in protection mode. The error codes of the
error buffer and the blinking LED procedure can be read via the
Service Default Menu (SDM), or via ComPair.
To get a quick diagnosis the chassis has three service modes
implemented:
•
The Customer Service Mode (CSM).
•
The Service Default Mode (SDM).
•
The Service Alignment Mode (SAM).
For a detailed mode description, see the relevant sections.
5.8
Fault Finding and Repair Tips
Notes:
•
It is assumed that the components are mounted correctly
with correct values and no bad solder joints.
•
Before any fault finding actions, check if the correct options
are set.
Service Modes, Error Codes, and Fault Finding L04HU AA
Check item
2411, 2412, 2413, 6404, 6411, 6412
3404, 7405
3466, 7451, 7452, 7453, 7454
1000, 5010, (PIP Module)
7604, 7605
7200, 3207, 3214
-
-
7601, 3604, 3605
1000, 5001
7330, 3351, CRT
7242 (PIP Module)
-
DVD Interface module
7610
7201
-
-
5.8.1
NVM Editor
In some cases, it can be handy if one directly can change the
NVM contents. This can be done with the "NVM Editor" in SAM
mode.
5.8.2
Power Supply
Set Not Working
Check Power
Supply Mains
Switch
Bridge Rectifier
Not Ok
circuit 6500
Ok
Check DC
voltage at
2505/2507
Ok
Check
Check
fusible
7512
resistor 3532
Figure 5-4 Fault finding tree "Set not working"
5.
Diagram
A2
A2
A2
F2
A5
A4
-
-
A5
A3
B1
F1
-
DVD Loader
H
F2
-
-
A4
A4
Check fusible
resistor 3510 &
circuit before it
Not Ok
Check IC7511 &
IC7531
Ok
Check other
Set able to fusible resistor
No
start-up and capacitor in
the circuit
Yes
End
E_14480_057.eps
EN 13
190204