Service Modes - Philips 20PT643F Service Manual

Table: Test point overview
Test point Circuit
A1-A2-A3-.... Audio processing
C1-C2-C3-.... Control
F1-F2-F3-.... Frame drive and output
I1-I2-I3-.... Tuner & IF
L1-L2-L3-... Line drive and output
P1-P2-P3-.... Power supply
S1-S2-S3-.... Synchronization
V1-V2-V3-.... Video processing
The numbering is in a logical sequence for diagnostics. Always start diagnosing within a
functional block in the sequence of the relevant test points for that block.
Perform measurements under the following conditions:
Television set in Service Default Alignment Mode.
Video input: Color bar signal.
Audio input: 3 kHz left channel, 1 kHz right channel.

Service Modes

Service Default Alignment Mode (SDAM) offers several features for the service
technician, while the Customer Service Mode (CSM) is used for communication
between the servicer and the customer.
Diagram
A8, A9 / A11
A7
A3
A4
A2
A1
A6
A5, B1