Loewe Concept L 42 User manual

Service Manual
230-90431.992
L 4200
Concept L 42
Platinum
Art.-N°64403A60
Concept L 42
Anthracite
Art.-N°64403D60

2 Technical Manual
Table Of Contents
1. Introduction.................................................................................................................3
2. Service-address..........................................................................................................3
3. Technical Data ............................................................................................................4
4. Service-Hints...............................................................................................................7
4.1 Transport ................................................................................................................7
4.2 Cleaning .................................................................................................................7
4.3 Test patterns ...........................................................................................................7
4.4 Ground straps.........................................................................................................7
4.5 OSD-Duration.........................................................................................................7
4.6 Reset ......................................................................................................................7
4.7 Factory defaults......................................................................................................7
4.8 General Reset ........................................................................................................7
4.9 Overtemperature- switch off ...................................................................................7
4.10 Software-Update...................................................................................................8
4.11 Typical Faults........................................................................................................8
4.12 Flat-display connectors.........................................................................................9
5. Wiring diagram .........................................................................................................10
6. AV3 Signalprocessing..............................................................................................11
6.1 AV3 wiring diagram............................................................................................... 11
6.2 In-/Outputpanel..................................................................................................... 11
6.3 Connectors ........................................................................................................... 11
6.4 Fault finding..........................................................................................................12
7. Startup Sequence .....................................................................................................15
8. Service OSD ..............................................................................................................16
8.1 Submenus ............................................................................................................16
9. Plasma Display.............................................................................................................19
9.1 Rear view including PCBs ....................................................................................19
9.2 Schematic Configuration ......................................................................................19
9.3 Power Supply Unit (PSU) .....................................................................................22
10. LVDS-Interface-Board ..............................................................................................23
11. Exploded Drawing ....................................................................................................24
12. Spare Parts List ........................................................................................................25

Technical Manual 3
1. Introduction
This manual is only intended for technically trained personel!
It was designed to enable the technician to carry out repairs on board—level in case of malfunction.Attempts
of repairs going on component level or, due to missing knowledge, will cause follow up defects, will lead
automatically to lapse of any warranty claims. The manufacturer reserves the right to check units, having been
returned for repair, to that effect.
In the case you should need support via telephone, please keep ready the ident—no. and the serial—no., both
can be found on the type label, located on the rearside of the unit, close to the mains inlet.
If you will have to return a defective unit for repair, please attach a detailed fault description, including when
and how the problem appears ( e.g. always after swichting on, sporadically, etc.)
In the unlikely event a problem should be unreproducible in our workshop, we immediately would like to get in
contact with you. For this reason it is very helpful if in the delivery note, besides the fault description, also a
technical contact person (incl. telephone—no.) is mentioned.
When working at respectively inside the device, always
disconnect mains inlet!
There are dangerous voltages inside the unit. The
regulations
and safety instructions according to VDE
shall be valid as well as the respective national
deviations!
Keep to ESD regulations!
Die wichtigsten Rufnummern der Zentrale Kronach:
The most important phone numbers of the Kronach headquarters
Telefon: FAX
Ersatzteilbestellungen: [phone] (0180) 522 1806
Status von Reparaturen: [phone] (0 92 61) 99 412
Support TV Röhre: [phone] (0 92 61) 99 730
Support Video/DVD: [phone] (0 92 61) 99 730
Support Telekommunikation: [phone] (0 92 61) 99 730
Support HiFi: [phone] (0 92 61) 99 730
Support TV Plasma, LCD, Rückprojektion: [phone] (0 92 61) 99 730
Loewe-Service und Logistik
LOEWE OPTA GmbH
Service + Logistik
Zentrale Kronach
96305 Kronach • Postfach 1554
96317 Kronach • Industriestraße 11
Note! Spare parts orders only through Service + Logistics / Headquarters in Kronach
2. Service-address
Introduction

4 Technical Manual
Technical Data
3. Technical Data
CONCEPT L 42
Display:
Model: PDP42V6####
Display Type: AC—PDP, V6
Screen size: 107 cm (42”)
Active screen (h x b): 920,1 mm x 518,4 mm
Aspect ratio: 16:9
Physical Resolution in Pixel: 852 x 480
Colors: 16,77 Mio.
Maximum Brightness: typ. 1000 cd / m2 (white peak @ 4% display load)
Maximum contrast ratio: typ. 3000:1 (dark room, white peak @ 4% display load)
Viewing angle (A/B, L/R): 800/800 , 800/800, typ.
Limitation power consumption: APC (Automatic Power Control)
Color temperature: 9500K (@ 20% grey) characterictics acc. to manufact. spec,
2—point adjustment not possible.
A.m. values are valid after 20 min operation at an ambient temp. of 25°C.
EMI Shielding Glass:
Type: Security Shatterproof Glass incl. Mesh
Transmission: 48% +/— 5%
Power requirement:
Mains Inlet: 115 — 230V ~ +/— 10%
Mains frequency: 50/60 Hz +/— 6%
Power consumption: 5W typ. in Standby, ca. 350W in operation
Inrush current: 40A max.
In— / Outputs:
Description Input / Output Signal
Cinch / Cinch: disabled no function
Cinch / Cinch: output Audio Subwoofer Line out / n.c.
Cinch / Cinch: output Audio Stereo Line out
Cinch / Cinch: input Audio Stereo for CVBS / YUV
Cinch / Cinch: input Audio Stereo for PC
Cinch / Cinch: input Audio Stereo for Y/C (S—Video)
DVI—I: input PC Connection to DVI—/ VGA—Signalsource
IEC: input RF antenna signal terrestrical or cable
IEC: output RF with patch cable connected to:
IEC: input RF
D—Sub 9pol: input / output PC RS232 for Softwareupdate
3x Cinch: input Video YUV, combined with CVBS
Euro AV: input Video CVBS, RGB, Audio L/R
output Video CVBS, Audio L/R
Euro AV: input Video CVBS, Audio L/R
output Video CVBS, Audio L/R
Input signals in PC Mode
Horizontal frequency range: 30kHz ... 80kHz
Vertical frequency range: 50Hz ... 90Hz
Pixel Clock frequency: max. 140MHz RGB, max. 110MHz DVI
Signal level, nominal: 0,7Vp—p +/— 3dB bei 75 Ohm
Synchronisation: SoG, Composite Sync, H— und V—Sync, separated
Sync. polarity: positiv and negativ
Sync. level: TTL, Loeding >1kOhm +/— 10%, bei SoG 0,3Vp—p +/— 0,015V,
negativ
VESA DDC Standard: 2B
Jitter: <6% @ 140MHz
Input resistance: 75 Ohm +/— 10% (0 ... 200MHz)
Threshold timing determination: +/— 2% (horizontal, vertical)
Transit time between 2 Timings: < 5sec

Technical Manual 5
Technical Data
Displayable resolutions in PC Mode (analog)
170 pre—defined Timings, e.g.
DOS 640 x 480 60Hz
DOS 720 x 400 70Hz
VGA 640 x 480 50Hz to 90Hz
SVGA 800 x 600 50Hz to 90Hz
XGA 1024 x 768 50Hz to 90Hz
Formats in PC Mode (analog)
11:1
2Format filling
3User Zoom (40% to 140%)
4Full screen
Input signal in PC Mode (digital)
Standard: DVI 1.0
Pixel Clock Frequency: max. 110MHz
Input signal in Video Mode
Standards: PAL: B/G, DK, I, M, N
SECAM: B/G, DK/K1, L/L’
NTSC: M4, B/G4, D/K4, I, NTSC—V (4,43)
Signal types: YUV, CVBS, Y/C, RGB
CVBS Signal level, nominal: 1Vp—p +/— 3% @ 75 Ohm
RGB Signal level, nominal: 0,7Vp—p +/— 3% @ 75 Ohm
Y—Signal level, nominal: 1Vp—p +/— 3% @ 75 Ohm
U—Signal level, nominal: 0,7Vp—p +/— 3% @ 75 Ohm
V—Signal level, nominal: 0,7Vp—p +/— 3% @ 75 Ohm
C (PAL) Signal level, nominal: 0,3Vp—p +/— 3% @ 75 Ohm synchronous color signal
C (SECAM) Signal level, nominal: 0,286Vp—p +/— 3% @ 75 Ohm synchronous color signal
Automatic format identification: WSS, BLD
CVBS Prozessing: Digital comb filter
Synchronisation: Analog and automatical sync recognition
Sync types: Composite, SoG
Sync levels: 0,3Vss +/— 3dB /75 Ohm
Formats in Video Mode
14:3
216:9
3Zoom (130%)
4User Zoom (40% to 140%)
5Full screen
6Panorama Zoom —> Cinema
7Auto
Displayable standards in RF Mode
CVBS Signals: PAL: B/G, DK, I
SECAM: B/G, DK/K1, L/L’
RF footprint: 47MHz to 861MHz (VHF / UHF / Hyperband)
Channel setting in RF Mode
Channel setting: Automatical channel search
storing and manual adjustment
Program locations in memory: 99
channel sorting: yes
Videotext
Videotext: TOP/FLOF, Level 2.5
Number of pages in memory: 2100
VPS: no
EPG: no
Audio Signals
Audio level Stereo inputs: 1Vrms
Audio level Stereo Line output: 1Vrms +6dB / —20dB adjustable via OSD
Frequency range (Line in / Line out): 20Hz to 20kHz

6 Technical Manual
Technical Data
Audio settings
Equalizer: yes, 5 fader
Treble, bass: not available
Speaker
Quantity: 2 per side
Frequency range: 100Hz — 20kHz, —3dB
Output: > 5W nominal output / speaker
Impedancy: 4 Ohm /Spk, serial connection to 8 Ohm
Dimensions and weight
Dimensions with and w/o stand:
Weight w/o Fuß: ca. 30kg
Weight incl. stand: ca. 35kg
Pixelfaults
Allowed Pixelfaults: According to manufacturer’s spec for the used PDP
(6 dark in A+B, 2 bright in B)
116,7
62,8
depth 9,4
116,7
70,7
depth 21,8
A-Zone
25% of
Display Area
B-Zone 75% of Display Area

Technical Manual 7
Service Hints
4. Service-Hints
4.1 Transport
The displays may only be transported in upright position! For the transport you have to take care for a save
pakking, for this the original packing, which is available at your LOEWE service ( See chapter 2. on page 3)
suits best.
4.2 Cleaning
For cleaning of the surface a dampened, lint—free cloth is most suitable. As cleaning liquid the manufacturer
recommendsenvironmental friendly glass cleaner.
Most suitable for the claening of the ventilation openings is a handheld vacuum cleaner, cleaning by means of
compressed air is not recommended, as dust might get into the unit.
4.3 Test patterns
When usingAV3 signal processing, test patterns are available under the service menu (see also chapter 8. on
page 16)
4.4 Ground straps
Ground straps, which connect the display with the housing of the unit, must be refitted after repair, to keep to
EMI regulations. Straps, which have been torn apart when removed, have to be substituted.
4.5 OSD—Duration
ForService itishelpful, toset theduration fortheOSD to”off”.Themenues willthennot disappearautomatically
(see also Operating Manual)
4.6 Reset
On malfunction or when the device has ”stuck up” (no control via IR possible anymore), switch off unit via
mains power switch — wait for 30 sec (until all electrolyt—capacitors are discharged) — switch on unit again.
4.7 Factory defaults
In the OSD—menu under submenu ”function” you will find the item ”factory defaults”.All settings will be set to
factory presets, the channel storage remains (see also Operating Manual).
4.8 General Reset
In the service menu (open with ”8640”, see also chapter 8.1.6 on page 17) under the submenu ”reset all” a
complete reset can be done.
CAUTION: Here the operating hours as well as the channel storage will be erased!
4.9 Overtemperature— switch off
”WARNING” will appear, as soon as the temperature on the AV3 electronics exceeds 60°C (Temperature 1)..
The unit will be switched to Stand By, the red LED is lit as soon as the temperature on the AV3 electronics
exceeds 65°C (Temperature 2). It is possible to switch on the unit again via remote control.
The unit will be switched to Stand By, the red LED starts to blink as soon as the temperature on the AV3
electronics exceeds 70°C (Temperature 3). It is not possible to switch on the unit again via remote control.
As soon as the temperature is below 60°C, the LED stops blinking, it is possible to switch on the unit again
(see also chapter 8.1.4 on page 17) .

8 Technical Manual
4.10 Software—Update
You need:
— Update—Program ”FlashUpgrader.exe” (for Windows 98 and Windows ME) or ”FlashUpgraderNT.exe” (for
Windows NT4.0, Windows 2000 as well as Windows XP). Under Windows 95 the update is not possible.
— actual software (the update software as well as the actual software release for your device is available as
zip—file at your LOEWE service, see chapter 2. on page 3 )
— Null—Modem cabel (serial date cable (RS232) with 9pin female connector on both sides, the wires must be
crossed)
Update:
— Unpack Update—Program and new Software into a new directory.
— Switch off unit (mains switch).
— Start Update—Programm.
— Select via ”Choose...” file ” *.inf” in the new directory with the firmware data.
— Set ”Connection” to ”serial”, select the used Com port as well as the Baud—rate (recommended 115200).
— All other options remain on ”default” position.
— Click on ”Flash” anklicken, the program is set to stand by
— Switch on the device using the mains switch. The program starts automatically, the progress is shown on
the display. Depending on the selected Baud—rate, the update takes about 3—6 minutes.
4.11 Typical Faults
In the case of malfunction, it is recommended to check the external wiring before opening the unit:
— Mains power available?
— Are the corresponding signal cables connected?
— Is there a signal available from the external sources?
— Is the corresponding signal source selected?
Also after opening the unit it is recommended to check the internal wiring and connectors to exclude any loose
contact.
4.11.1 No display (on all signal modes)
— Check In—/Outputs of power supply (see chapter 9.3 on page 22)
4.11.2 Not possible to switch unit on (remains in StandBy)
— Check IR remote control (batteries!)
— Reinstall software (see chapter 4.10 on page 8)
— Check AV3—electronic (see chapter 6.4 on page 12)
4.11.3 Missing lines or columns
— Check display (see chapter 9. on page 19)
4.11.4 Pixel faults
Due to technological reasons single pixels or subpixels might fail on TFTs as well as on Plasma displays. As
long as the number of faults is within the limits mentioned in the specification, there is no device defect
existent (see chapter 3.on page 6) .
4.11.5 Missing colors
— Check data cable (see chapter 6. on page 11)
— Check AV3 (see chapter 6.4 on page 12)
— Check display (see chapter 9. on page 19)
4.11.6 Channel search not working / not working properly
— Check AV3 (siehe chapter 6.4 on page 12)
Service Hints

Technical Manual 9
Service Hints
Lift upwards
before disconnecting unlock by pressing
to unlock pull towards arrow direction
take care for rest noses!
to unlock fold towards arrow direction
4.12 Flat—display connectors
Ifthereshould bearepair orjust a checkon a LCD—or Plasma—panel, itwill become necessaryto disconnect
some of the connectors. Sometimes this is quite complicated, disconnetion only with force will lead to total
defect of the panel in the worst case. Below there are the most common connectors and how to disconnect
them:

10 Technical Manual
230 V~
90432.918
90432.921
90432.923
90432.922
90432.924
90432.903
90432.919
90432.908
90432.920
90432.900
90432.901
Ansicht der Netzschalter-Kontakte View on the power switch contacts
Pin Leitung / wire 1a 0921-0204-6501D3 1 2215-1146-0001 (braun / brown) 2a 0921-0204-6501E3 2 2215-1146-0001 (blau / blue)
Audio Power in 4 pin 1,2 GND 3,4 30V
Bolzen für Erdung, Zahnscheibe verwenden Earth over bolted assembly, use a toothed lock washer
X1 1 GND 11RD+ 19 GND 2 DISPEN 12 RB- 20 R3+ 3 SLE 13 GND 21 R3- 4 SCLK 14 RCLK+ 22 GND 5 SDATA 15 RCLK- 23 RA+ 6 GND 16 GND 24 RA- 7-9 n.c. 17 RC+ 25 GND 10 GND 18 RC-
1 ACD 2 RLY ON 3 +5Vst_by 1,2,3 +5V 4 GND 4,5,6 GND 5 Vs ON 7,8 +12V 6 5VD 9,10 GND 7 n.c. 11,12 n.c.
P1031 1 GND 13 GND 2 RA- 14 GND 3 RA+ 15-18 n.c. 4 RB- 19 GND 5 RB+ 20-25 n.c. 6 GND 26 GND 7 RC- 27 DISPEN 8 RC+ 28 SDATA 9 RCLK- 29 SCLK 10 RCLK+ 30 SLE 11 RD- 31 GND 12 RD+
X1
X1
1 ACPWCK 2 RLYON 3 5V STBY 4 GND 5 VSon 6 FPVRR 7 n.c.
1,7,18 GND 3 LED (rt/rd) 4 LED (grn) 19 +5VST 20 IR Rec
1 +5VST 2,4,6 GND 3,5 +5V (VCC) 7 +12V 8 PSSTDBY 9 PSDPMS 10 FPVRR
Keyboard
7 pin
CN11 CN19 CN13
Audio
Power Power
5V / 12V
Logic Board
Signal Input
Connector
? X
4 X
2 X
? X
Driller
00
Klebeschellen Kantenschutz
Kantenschutz
LG Electronics
PDP 42V6.....(LG KK)
42 ” Plasma Display
+5VSB and
PSU control
1,2 30V 3,4 GND
4 pol 4 pin
10 pol 10 pin
8 pol 8 pin
roter Sockel red socket
CN8
CN2
J7
Control
7 pin
f1 f1
f2
Scart 2
Scart 1
Power +5V/+12V in
10 pin
LVDS-Adapter
90432.902
AV3plusL
PIP-Tuner
IR-Receiver
LED grn/rt // grn7rd
L
R
LS-R
4 Speakers 4 Ohm
--
++
--
2
6774
Folie 12 cm Kontaktblech
2
++
LS-L
300lg
140lg
650lg
150lg
300lg
300lg
100lg
300lg
200lg
Netzteil Bestandteil des PDP
Power Supply Unit (PSU) Part of PDP
CN02
CN03
CN802 CN801 CN803
1
1
1
2
2
1a
1a
Netzschalter Power Switch
Part of PDP PE
Netzeingang (Bestandteil PDP) Power Input Part of (PDP)
2a
2a
2
L
N
CON1
Verkabelung, vormontiert
Wiring, premounted
CN805CN806CN807
P2008P2005P3001
P31
00
CN29
CN20
5. Wiring diagram