Service Modes, Error Codes - Philips F21RE Service Manual

5. Service Modes, Error Codes, and Fault Finding
Index of this section:
1. Test Points
2. Service Modes
3. Problems and Problem Solving Tips (related to CSM).
4. ComPair
5. Error Codes
6. Protections
7. Repair Tips
5.1
Test Points
5.1.1
General
Perform measurements under the following conditions:
•
Set in Service Default Mode.
•
Video: Colour bar signal, received via the internal tuner.
•
Audio: 3 kHz left, 1 kHz right.
Exceptions (when using external sources):
•
Set in Service Default Mode (SDM).
•
Video: If using a DVD player, use a "live" picture. If using a
VGA source, use a picture of your choosing.
•
Audio: You can use a service generator, or the audio from
the DVD player or VGA source.
5.1.2
Waveforms
The chassis is equipped with test points printed on the circuit
board assemblies. Test points are displayed in two different
ways:
•
The old method, still in use for re-used circuits (like the
Small Signal Panel, the Double Window Panel, and the
Feature Box), refers to the functional blocks. The test
points have names starting with I for IF, S for sound, etc.
The numbering is in a logical sequence for diagnostics.
•
The new method, used for new circuits, uses service test
points that are recognizable as tagged Fxxx points. With
this method, factory test points are published (F-points are
functional test points, I-points are test points for in-circuit
testers in the factory. All these test points are on the copper
side. When the test point is a service test point, it is tagged
for recognition.
Not all test points have been measured, but they can serve as
identification names in Service communication (for example,
ComPair fault find trees, Searchman files).
In the following cases, there will also be no waveform:
•
When a Vdc voltage is displayed in the diagrams, or when
the waveform does not have an additional value.
•
When the sources are not easy accessible for the Service
engineer (for example, VGA source).
•
External AV inputs are not measured, since the waveform
is equal to the source (dependent of load resistor
matching).
5.1.3
DC voltages
The DC voltages are measured at practically all semiconductor
pins. These values are displayed in the circuit diagrams. If a DC
value is displayed between brackets then this value is
measured in "standby" mode.
Note: DC voltages are also measured on the connectors.
5.2
Service Modes
Service Default Mode (SDM) and Service Alignment Mode
(SAM) offer several features for the service technician, while
the Customer Service Mode (CSM) is used for communication
between the servicer and the customer.
Service Modes, Error Codes, and Fault Finding
F21RE AB
There is also the option of using ComPair, a hardware interface
between a computer (see requirements) and the FTV chassis.
It offers the ability of structured troubleshooting, a test pattern
generation, error code reading, software version readout, and
software upgrading. (Software upgrading is not available for all
chassis)
Minimum requirements for ComPair: a Pentium Processor,
Windows 9x/NT/2000/XP/ME, and a CD-ROM drive (see
"ComPair" section).
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 (only when SDM is entered via
the "service pins" on SSP connector 0356).
•
To start the "blinking LED" procedure.
Specifications
•
Tuning frequency: 475.25 MHz for PAL/SECAM (the
source is displayed on the screen)
•
Colour system: SECAM L for France and PAL B/G for the
rest of Europe.
•
All picture settings at 50 % (brightness, colour, contrast).
•
Bass, treble and balance at 50 %; volume at 25 %.
•
All service-unfriendly modes (if present) are disabled. The
service unfriendly modes include:
–
Sleep timer.
–
Smart modes.
–
On Timer.
–
Child lock.
–
Black mute.
How to enter SDM
To enter SDM, use one of the following methods:
•
Press the following key sequence on the remote control
transmitter: 062596 directly followed by MENU.
•
Short pins 2 and 3 on connector 0356 of the SSP (the two
pins that are nearest to the rear panel) while the set is in
the normal operation mode.
Caution: Entering SDM by this method will override all
processor-controlled protections. When doing this, the service
technician must know exactly what he is doing, as this could
damage the set.
•
Use the Dealer Service Tool (DST) emulation feature of
ComPair.
After entering SDM, a blank screen is visible, with "Service
Default" in the upper part for recognition. The "blinking LED"
procedure is started and will indicate any possible errors via the
front LED.
How to navigate in SDM
To toggle to the SAM mode, press the following key sequence
on the remote control transmitter: 062596 directly followed by
OSD (i+).
How to exit SDM
Switch the set to STANDBY by pressing the POWER button on
the remote control transmitter (if you switch the set OFF by
disconnecting the mains cable, the set will remain in SDM
when mains is reapplied).
5. EN 29