Philips L04L, Service Manual

Page: 31 / 94

Service Modes, Error Codes, and Fault Finding
EN 31 L04L AA 5.
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.
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. In the next table, the default NVM values are given.
Table 5-4 NVM default values for LATAM-region
Item
A
ddr
es
s (de
c
)
Default values (dec)
25
PT55
41
28
PW
644
1
28
PW
654
2
29
PT46
41
29
PT56
42
32
PW
654
2
EW (EW Width) 19 37 37 37 37 37 37
PW (EW Parabola Width) 20 10 10 10 10 10 10
HS (Horizontal Shift) 21 26 26 26 26 26 26
HP (Horizontal Parallelogram) 22 31 31 31 31 31 31
HB (Horizontal Bow) 23 31 31 31 31 31 31
UCP (EW Upper Corner Parabola) 24 30 30 30 30 30 30
LCP (EW Lower Corner Parabola) 25 40 40 40 40 40 40
TC (EW Trapezium) 26 26 26 26 26 26 26
VS (Vertical Slope) 27 37 37 37 37 37 37
VA (Vertical Amplitude) 28 30 30 30 30 30 30
SC (S-Correction) 29 30 30 30 30 32 32
VSH (Vertical Shift) 30 26 26 26 26 26 26
VX (Vertical Zoom) 31 25 25 25 25 25 25
VSL (Vertical Scroll) 32 32 32 32 32 32 32
VL (Vertical Linearity) 33 32 32 32 32 32 32
BLOR (Black Level Offset - Red) 34 29 29 29 29 29 29
BLOG (Black Level Offset - Green) 35 19 19 19 19 19 19
AGC (AGC Takeover) 36 20 20 20 20 20 20
OIF (IF-PLL Offset) 37 36 36 36 36 36 36
AGC10 (AGC 10) 38 1 1 1 1 1 1
H60 (60 Hz Horizontal Shift) 39 9 9 9 9 9 9
60 Hz Vertical Amplitude 42 32 32 32 32 48 48
YD & CL 43 87 87 87 87 87 87
RGB amplitude for full teletext mode 46 8 8 8 8 8 8
NVM_TABLE_VERSION 60 22 22 22 22 22 22
OPTION_TABLE_VERSION 61 7 7 7 7 7 7
CVI_BLOR 62 21 21 21 21 21 21
CVI_BLOG 63 15 15 15 15 15 15
TXT Brightness 64 23 23 23 23 23 23
V60 offset (60Hz Vertical Amplitude) 66 -2 -2 -2 -2 -2 -2
FOAB, CHSE 139 3 3 3 3 3 3
SPR, WS 140 0 0 0 0 0 0
VMA, SVM 141 50 50 50 50 50 50
NVM_SOC_SMD 142 3 3 3 3 3 3
CCC-PGR 143 31 31 31 31 31 31
CCC-PGG 144 31 31 31 31 31 31
CCC-PGB 145 31 31 31 31 31 31
NVM_FMWS 149 3 3 3 3 3 3
NVM_ASD_SC1_THR 150 16 16 16 16 16 16
NVM_CRYSTALALIGN 208 63 63 63 63 63 63
Last Brightness (VID PP others) 264 50 50 50 50 50 50
Last Color (VID PP others) 265 50 50 50 50 50 50
Last Contrast (VID PP others) 266 50 50 50 50 50 50
Last Sharpness (VID PP others) 267 50 50 50 50 50 50
Last Hue (VID PP others) 268 0 0 0 0 0 0
Last Color Temperature
(VID PP others) 269 50 50 50 50 50 50
White-D Cool Red 294 -3 -3 -3 -3 -3 -3
White-D Cool Blue 296 5 5 5 5 5 5
White-D Normal Red 297 26 26 26 26 26 26
White-D Normal Green 298 32 32 32 32 32 32
White-D Normal Blue 299 27 27 27 27 27 27
White-D Warm Red 300 2 2 2 2 2 2
White-D Warm Blue 302 -6 -6 -6 -6 -6 -6
Last Volume 343 20 20 20 20 20 20
Last Balance 344 50 50 50 50 50 50
Last Treble (AUD PP others) 345 85 85 85 85 80 80
Last Bass (AUD PP others) 346 173 173 173 173 173 173