Advertisement
GB 8
4.
4. Mechanical instructions
4.1
Service positions
See figure 4.2 for the service position.
Disconnect the connecting cable feeding the right-hand and the
left-hand speaker, also disconnect the degaussing cable.
1
5. Service Modes, fault finding and repair tips
In this chapter the following paragraphs are included:
5.1 Test points
5.2 Service Modes and Dealer Service Tool (DST)
5.3 The menus and submenus
5.4 Error code buffer and error codes
5.5 The "blinking LED" procedure
5.6 Trouble shooting tips
5.7 Customer service mode ( CSM )
5.8 ComPair
5.9 Ordering compare
5.1
Test points
The L9 chassis is equipped with test points in the service
printing. These test points are referring to the functional blocks:
•
A1-A2-A3, etc.: Test points for the AM Mono Demodulator
( A9 ), ITT panel ( D1) and Sound amplifier ( D2 )
•
C1-C2-C3, etc.: Test points for the control circuit ( A7 ) and
the front control ( A8 )
•
F1-F2-F3, etc.: Test points for the frame deflection circuit (
A3 )
•
I1-I2-I3, etc.: Test points for the Tuner Video IF circuit ( A5 )
•
L1-L2-L3, etc.: Test points for the Line deflection circuit (
A2 )
•
P1-P2-P3, etc.: Test points for the power supply ( A1 )
•
S1-S2-S3, etc.: Test points for the synchronisation circuit (
( A4 )
L9.2E
Mechanical instructions
1 1
A
The mono-carrier is removed by pushing the two centre clips at
both chassis brackets outwards and pulling the panel forward.
Figure 4-2
•
V1-V2-V3, etc.: Test points for the video processing circuit
/ CRT panel( A6 ) / CRT panel ( B )
Measurements are performed under the following conditions:
•
Video: colour bar signal;
•
audio: 3kHz left, 1kHz right
5.2
Service modes and Dealer Service Tool (DST)
For easy installation and diagnosis the dealer service tool
(DST) RC7150 can be used. When there is no picture (to
access the error code buffer via the OSD), DST can enable the
functionality of displaying the contents of the entire error code
buffer via the blinking LED procedure, see also paragraph 5.5.
The ordering number of the DST (RC7150) is 4822 218 21232.
5.2.1
Installation features for the dealer
The dealer can use the RC7150 for programming the TV-set
with presets. 10 Different program tables can be programmed
into the DST via a GFL TV-set (downloading from the GFL to
the DST; see GFL service manuals) or by the DST-I (DST
interface; ordering code 4822 218 21277). For explanation of
the installation features of the DST, the directions for use of the
DST are recommended (For the L9 chassis, download code X
should be used).
B
CL 96532028_004.eps
190499
Advertisement
