Service Modes, Error Codes and Fault Finding
EN 8
L01H.2E
5.
5.
Service Modes, Error Codes and Fault Finding
Index:
1.
Test points.
2.
Service Modes.
3.
Problems and Solving Tips (related to CSM).
4.
Error Buffer.
5.
The Blinking LED Procedure.
6.
Protections.
7.
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
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:
•
Service Default Alignment Mode.
•
Video: colour bar signal.
•
Audio: 3 kHz left, 1 kHz right.
5.2
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 dealer and
customer.
Table 5-2
5.2.1
Service Default Alignment Mode (SDAM)
Purpose
•
To change option settings.
•
To create a predefined setting to get the same
measurement results as given in the manual.
•
To display / clear the error code buffer when leaving SDAM
with "STANDBY" key on remote control.
•
To override SW protections.
•
To perform alignments.
•
To start the blinking LED procedure.
Specifications
•
Tuning frequency:
–
475.25 MHz for PAL/SECAM (Europe and AP-PAL)
•
Colour system:
–
PAL-M for LATAM BI/TRI/FOUR-NORMA.
–
SECAM L for France.
–
NTSC for NAFTA and AP-NTSC.
–
PAL-BG for Europe and AP-PAL.
•
All picture settings at 50 % (brightness, colour contrast,
hue).
•
Bass, treble and balance at 50 %; volume at 25 %.
•
All service-unfriendly modes (if present) are disabled, like:
–
(sleep) timer,
–
child/parental lock,
–
blue mute,
–
hotel/hospitality mode
–
auto switch-off (when no 'IDENT' video signal is
received for 15 minutes),
–
skip / blank of non-favorite presets / channels,
–
auto store of personal presets,
–
auto user menu time-out.
•
Operation hours counter.
•
Software version.
•
Option settings.
•
Error buffer reading and erasing.
•
Software alignments.
How to Activate SDAM
Use one of the following methods:
•
Use a System 7 remote control type T374AH (RC-
transmitter RG4172BK) and key in the code '062596'
directly followed by the 'M' (menu) button or
•
Short circuit jumper wires 9631 and 9641 on the mono
carrier (see fig. 8-1) and apply AC power. Then press the
power button (remove the short circuit after start-up).
Caution: Entering SDAM by short circuiting wires 9631
and 9641 will override the +8V-protection. Do this only for
a short period. When doing this, the service-technician
must know exactly what he is doing, as it could lead to
damaging the set.
After activating SDAM, the following screen is visible, with S at
the upper right side for recognition.
SDAM Menu
Figure 5-1
1.
LLLL
This is the operation hours counter. It counts the normal
operation hours, not the standby hours.
2.
AAAABC-X.Y
This is the software identification of the main micro
controller:
–
A = the project name (L01H).
–
B = the region: E= Europe, A= Asia Pacific, U= NAFTA,
L= LATAM.
–
C = the feature and language:
TEST POINT OVERVIEW L01
Test point
Circuit
Diagram
A1-A2-A3-..
Audio processing
A8, A9 / A11
C1-C2-C3-..
Control
A7
F1-F2-F3-..
Frame drive and output
A3
I1-I2-I3-..
Tuner & IF
A4
L1-L2-L3-.
Line drive
A2
P1-P2-P3-..
Power supply
A1
S1-S2-S3-..
Synchronisation A6
V1-V2-V3-..
Video processing
A5, B1
SW Cluster Software name UOC type
Diversity
1EU1
L01HE1 X.Y
TDA9552
L01H.2E
Abbreviations: H = Hotel, E = Europe, 1 = Basic, Basic Plus
and System, English, French, German and Italian
CL 16532138_014.eps
221101
LLLL AAAABC X.Y
S
ERR XX XX XX XX XX
OP XXX XXX XXX XXX XXX XXX XXX
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