Test Points; Service Modes, Error Codes, And Fault Finding - Philips 32PFL3403D/85 Service Manual

EN 20 5. LC8.1U LA

5. Service Modes, Error Codes, and Fault Finding

Index of this chapter:

5.1 Test Points

5.2 Service Modes
5.3 Service Tools
5.4 Error Codes
5.5 The Blinking LED Procedure
5.6 Fault Finding and Repair Tips
5.7 Software Upgrading
5.1 Test Points
In the chassis schematics and layout overviews, the test points
are mentioned. In the schematics, test points are indicated with
"Fxxx" or "Ixxx", in the layout overviews with a "half-moon" sign.
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
The Service Mode feature is split into four parts:
• Service Default Mode (SDM).
• Service Alignment Mode (SAM).
• Customer Service Mode (CSM).
• Computer Aided Repair Mode (ComPair).
SDM and SAM offer features, which can be used by the Service
engineer to repair/align a TV set. Some features are:
• A pre-defined situation to ensure measurements can be
made under uniform conditions (SDM).
• Activates the blinking LED procedure for error identification
when no picture is available (SDM).
• The possibility to overrule software protections when SDM
is entered via the Service pins.
• Make alignments (e.g. White Tone), (de)select options,
enter options codes, reset the error buffer (SAM).
• Display information ("SDM" or "SAM" indication in upper
right corner of screen, error buffer, software version,
operating hours, options and option codes, sub menus).
The CSM is a Service Mode that can be enabled by the
consumer. The CSM displays diagnosis information, which the
customer can forward to the dealer or call centre. In CSM
mode, "CSM", is displayed in the top right corner of the screen.
The information provided in CSM and the purpose of CSM is to:
• Increase the home repair hit rate.
• Decrease the number of nuisance calls.
• Solved customers' problem without home visit.
ComPair Mode is used for communication between a computer
and a TV on I2C /UART level and can be used by a Service
engineer to quickly diagnose the TV set by reading out error
codes, read and write in NVMs, communicate with ICs and the
uP (PWM, registers, etc.), and by making use of a fault finding
database. It will also be possible to up and download the
software of the TV set via I2C with help of ComPair. To do this,
ComPair has to be connected to the TV set via the ComPair
connector, which will be accessible through the rear of the set
(without removing the rear cover).
Service Modes, Error Codes, and Fault Finding
5.2.1 General
Some items are applicable to all Service Modes or are general.
These are listed below.
Life Timer
During the life time cycle of the TV set, a timer is kept (called
"Op. Hour"). It counts the normal operation hours (not the
Stand-by hours). The actual value of the timer is displayed in
SDM and SAM in a decimal value. Every two soft-resets
increase the hour by +1. Standby hours are not counted.
Software Identification, Version, and Cluster
The software ID, version, and cluster will be shown in the main
menu display of SDM, SAM, and CSM.
The screen will show: "AAAABCD X.YY", where:
• AAAA is the chassis name: LC81.
• B is the region indication: E= Europe, A= AP/China, U=
NAFTA, L= LATAM.
• C is the display indication: L= LCD, P= Plasma.
• D is the language/feature indication: P= Philips, M=
Magnavox.
• X is the main version number: this is updated with a major
change of specification (incompatible with the previous
software version). Numbering will go from 1 - 9 and A - Z.
– If the main version number changes, the new version
number is written in the NVM.
– If the main version number changes, the default
settings are loaded.
• YY is the sub version number: this is updated with a minor
change (backwards compatible with the previous versions)
Numbering will go from 00 - 99.
– If the sub version number changes, the new version
number is written in the NVM.
– If the NVM is fresh, the software identification, version,
and cluster will be written to NVM.
Display Option Code Selection
When after an SSB or display exchange, the display option
code is not set properly, it will result in a TV with "no display".
Therefore, it is required to set this display option code after
such a repair.
To do so, press the following key sequence on a standard RC
transmitter: "062598" directly followed by MENU and "xxx",
where "xxx" is a 3 digit decimal value of the panel type: see
column "Panel Code" in table "Option Codes OP1...OP7" (ch.
8), or see sticker on the side/bottom of the cabinet. When the
value is accepted and stored in NVM, the set will switch to
Stand-by, to indicate that the process has been completed.
Display Option
Code
39mm
PHILIPS
040
MODEL:
32PF9968/10
PROD.SERIAL NO:
AG 1A0620 000001
(CTN Sticker)
Figure 5-1 Location of Display Option Code sticker
During this algorithm, the NVM-content must be filtered,
because several items in the NVM are TV-related and not SSB-
related (e.g. Model and Prod. S/N). Therefore, "Model" and
"Prod. S/N" data is changed into "See Type Plate".
In case a call centre or consumer reads "See Type Plate" in
CSM mode, he needs to look to the side/bottom sticker to
identify the set, for further actions.
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