Service Modes, Error Messages, and Repair Tips
5.
5.
Service Modes, Error Messages, and Repair Tips
Index of this chapter:
1.
Test Points
2.
Service Modes
3.
Errors
4.
The “Blinking LED” Procedure
5.
ComPair
6.
Trouble Shooting Tips
5.1
Test Points
This chassis is equipped with test points in the service printing.
In the schematics test points are identified with a rectangle box
around Fxxx or Ixxx. On the PCB, test points are specifically
mentioned in the service manual as “half moons” with a dot in
the centre.
Measurements are performed under the following conditions:
•
Video: colour bar signal.
•
Audio: 3kHz left, 1kHz right.
5.2
Service Modes
5.2.1
Limited DST Support
This chassis does still have some limited Dealer Service Tool
(DST) support, although this remote is not for sale anymore.
The set can be put in two service modes via the DST (RC7150).
These are the Service Default Mode (SDM) and the Service
Alignment Mode (SAM).
Installation Features Dealer
For easy installation and diagnosis the DST 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.
The dealer can use the RC7150 for programming the TV-set
with presets. Ten different program tables can be programmed
into the DST via a GFL or MG TV-set (downloading from the
GFL or MG to the DST; see GFL or MG service manuals) or by
the DST-I. For explanation of the installation features of the
DST, the directions for use of the DST are recommended.
5.2.2
Service Default Mode (SDM)
Purpose of SDM:
•
To provide a situation with predefined settings to get the
same measurements as in this manual.
•
To start the “Blinking LED” procedure.
•
To have the possibility to override the 5V protection
Activating SDM:
•
By transmitting the "DEFAULT" command with the RC7150
Dealer Service Tool (this works both while the set is in
normal operation mode or in the SAM).
•
Standard RC sequence 0-6-2-5-9-6 followed by pressing
the “MENU”-button (this works both while the set is in
normal operation mode or in the SAM).
•
By shorting pins 5 and 6 of connector 1170 of LED/RC
panel. Then apply DC supply from the AC-DC adaptor (not
required to remove the metal shielding).
Note: By temporarily shorting pins 5 and 6 of connector 1170
and then applying DC supply from the AC-DC adaptor, the 5V
protection is disabled.
Caution: Overriding the 5V protection should only be used for
a short period of time. In case of S/W protections (error 4) the
set will shutdown after 15 sec.
For recognition, “SDM” is displayed at the upper right corner of
the screen.
Figure 5-1 SDM Menu
Deactivating SDM:
•
Press the “EXIT”-button on the DST, or
•
Press 0-0 on the standard RC, or
•
Switch the set to Standby (the error buffer is NOT cleared).
Note: When the mains power is switched off while the set is in
SDM, the set will switch to SDM immediately when the mains
is switched on again.
The SDM sets the following pre-defined conditions:
•
PAL/SECAM sets: tuning at 475.25 MHz PAL.
•
NTSC sets: tuning at channel 3 (61.25 MHz).
•
Volume level is set to 25% (of the maximum volume level).
Other picture and sound settings are set to 50%.
The following functions are switched off in SDM (and after
leaving SDM):
•
Timer.
•
Sleep timer.
The following functions are disabled during SDM (and enabled
after leaving SDM)
•
Parental lock.
•
Blue mute.
•
Hospitality Mode.
•
No-ident Timer (normally the set is automatically switched
off when no video signal (IDENT) was received for 15
minutes).
All other controls operate normally.
Special Functions SDM
Access to normal user menu
Pressing the “MENU” button on the remote control switches
between the SDM and the normal user menus (with the SDM
mode still active in the background).
Channel search
Pressing the “P+” button of the remote control will select the
next available channel in the preset list.
Type nr, Error buffer, etc
Pressing the “OSD” or “info+” button of the remote control
shows/hides the type nr, error buffer, SW ID, Hours and option
codes. OSD can be hidden to prevent interference with
waveform measurements.
SDM Menu
CL 36532023_084.eps
110403
T Y P E : 1 7 P F 9 9 4 5 / 0 1 2 H R S : 0 0 2 9
S W I D : L C 0 3 E 2 1 - 1 . 1 1 S 3 1 7 1 . 0 3
E R R : 0 0 0 0 0 0 0
O P T : 7 9 2 5 4 1 4 5 6 1 2 8 0 0 0
S D M
