Service Modes, Error Codes And Fault Finding - Philips L04A AB 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 Problems and Solving Tips Related to CSM
5.4 ComPair
5.5 Error Codes
5.6 The Blinking LED Procedure
5.7 Protections
5.8 Fault Finding and Repair Tips
5.1 Test Points
The chassis is equipped with test points printed on the circuit
board assemblies. These test points refer to the functional
blocks:
Table 5-1 Test point overview
Test point
I511, I531, I513, I519, F508, I516, I533,
F552, I565, I545, F563, F561, F573,
F536, F537, F564
F402, F401, F412, F468, F467, F418,
F414, F460, F461, I468, F452, F453,
F455, I462, F458, F459
I001, I002, F003, F004
F201, F203, F205
N.A
I951, I952, F952, F955
F692
F331, F332, F334, F333, F338, F339,
F341, F354, F353
F361, F362, F381, F382
I206, I208, I209, I204, I201, I202
F001, F002, F003, F004
F005, F006, F007, F008
F009, F010, F011
N.A
F047,F012,F022,F019,F023,F024,
F048,F038,F039,F040,F025,F020,
F021,F013,F014,F026,F027,F016,
F015,F017,F018,F041,F049,F042,
F043,F050,F044,F045,F046
Table 5-2 Software cluster overview
SW Cluster SW name
L4TAN1 L04AT1 x.y TDA12010H
Abbreviations: CC = Closed CaptionNONTXT= No teletextMULTISND=2CS BG, 2CS D/K, FM/FM (5.5-5.74) (B/G),
FM/FM (6.5-6.74) (China), NICAM B/G (5.5-5.85), NICAM D/K (6.5-5.85) (Hung), NICAM I (6.0-6.52)
Service Modes, Error Codes and Fault Finding
Circuit
Power supply
Line Deflection
Tuner IF
Hercules
Features Connectivities
Audio Amplifier
Front Control
CRT Panel
ECO Scavem
Trident interface board
DPTV
YpbPr input
ADC
SDRAM
Display & Processing
Hercules Diversity 12 NC Checksum
935274424557 0472BA5B
Note: Not all listed test points are measured.
Perform measurements under the following conditions:
• Television set in Service Default Alignment Mode.
• Video input: Colour bar signal.
• Audio input: 3 kHz left channel, 1 kHz right channel.
5.2 Service Modes
Service Default mode (SDM) & 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 readout for all these chassis.
Minimum requirements for ComPair: a Pentium processor, a
Diagram
Windows OS, and a CD-ROM drive (see "ComPair" section).
A1
A2
A3
A4
A5
A7
A9
B1
B2
TI
T1
T2
T3
T4
T5
ROM Sizs Special Features
128K CC.NONTXT+MULTISND
L04A AB 5. EN 15