Service Modes, Error Codes, And Fault Finding - Philips 32PF9968/10 Service Manual

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5. Service Modes, Error Codes, and Fault Finding

Index of this chapter:
5.1 Test Points
5.2 Service Modes
5.3 Stepwise Start-up
5.4 Service Tools
5.5 Error Codes
5.6 The Blinking LED Procedure
5.7 Protections
5.8 Fault Finding and Repair Tips
5.9 Software Upgrading
5.1 Test Points
As most signals are digital, it will be difficult to measure
waveforms with a standard oscilloscope. Several key ICs are
capable of generating test patterns, which can be controlled via
ComPair. In this way it is possible to determine which part is
defective.
Perform measurements under the following conditions:
• Service Default Mode.
• Video: Color bar signal.
• Audio: 3 kHz left, 1 kHz right.
5.2 Service Modes
Service Default mode (SDM) and Service Alignment Mode
(SAM) offers several features for the service technician, while
the Customer Service Mode (CSM) is used for communication
between the call centre and the customer.
This chassis also offers the option of using ComPair, a
hardware interface between a computer and the TV chassis. It
offers the abilities of structured troubleshooting, error code
reading, and software version read-out for all chassis.
(see also paragraph "ComPair").
5.2.1 Service Default Mode (SDM)
Purpose
• To create a pre-defined setting, to get the same
measurement results as given in this manual.
• To override SW protections detected by stand-by
processor and make the TV start up to the step just before
protection (a sort of automatic stepwise start up). See
paragraph "Stepwise Start Up".
• To override SW protections detected by Mips. See also
paragraph "Error codes".
• To start the blinking LED procedure (not valid for
protections detected by stand-by software).
Service Modes, Error Codes, and Fault Finding
Specifications
Table 5-1 SDM default settings
Region Freq. (MHz)
Europe, AP(PAL/Multi) 475.25
Europe, AP DVB-T 546.00 PID
Video: 0B 06 PID
PCR: 0B 06 PID
Audio: 0B 07
NAFTA, AP-NTSC, 61.25 (ch 3)
LATAM
• Tuning frequency 61.25 MHz for NTSC: The TV shall tune
to physical channel 3 only if channel 3 is an analog channel
or if there is no channel 3 installed in the channel map. If
there is a digital channel installed in channel 3, then the
frequency to which the set will tune, would be as specified
in the channel map and could be different from the one
corresponding to the physical channel 3.
• All picture settings at 50% (brightness, color, contrast).
• All sound settings at 50%, except volume at 25%.
• All service-unfriendly modes (if present) are disabled, like:
– (Sleep) timer.
– Child/parental lock.
– Picture mute (blue mute or black mute).
– Automatic volume levelling (AVL).
– Auto switch "off" (when no video signal was received
for 10 minutes).
– Skip/blank of non-favorite pre-sets.
– Smart modes.
– Auto store of personal presets.
– Auto user menu time-out.
How to Activate SDM
For this chassis there are two kinds of SDM: an analog SDM
and a digital SDM. Tuning will happen according table "SDM
Default Settings".
• Analog SDM: use the standard RC-transmitter and key in
the code "062596", directly followed by the "MENU" button.
Note: It is possible that, together with the SDM, the main
menu will appear. To switch it "off", push the "MENU"
button again.
• Digital SDM: use the standard RC-transmitter and key in
the code "062593", directly followed by the "MENU" button.
Note: It is possible that, together with the SDM, the main
menu will appear. To switch it "off", push the "MENU"
button again.
• Analog SDM can also be activated by shortening for a
moment the two solder pads [1] (see figure "Service mode
pads") on the SSB, with the indication "SDM". Activation
can be performed in all modes, except when the set has a
problem with the Stand-by Processor.
Default
system
PAL B/G
DVB-T
NTSC M