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FEATURE STEREO
FX-CHASSIS TV1996
Service manual a Manuel de service
Service-Manual @I Manuale di servizio
Serviceanvisning
NOlSALORA 29VlOO
FIN UJX 71 U2/74U2 IOOHz
Supplement to Service Manual 6611 73 78
Subwoofer 5
PP SDA
cc-
ICf3
J,
M3L 1
211 391 36, 43, 44
I
SERVICE MODE SELECTION: Switch on the receiver by pressing the mains switch and within 5 s. press the
remote control buttons MENU, TV and `7" successively.
WAHL DES SERVICE-MODUS: Einschalten Sie das Gerat mit dem Netzschalter und, innerhalb 5 Sekunden
driicken Sie nacheinander die Fernbedienungstasten MENU, TV und "7.
VAL AV SERVICE-L2iGE: Sla pa mottagaren med huvudstrombrytaren och inom 5 s. tryck pa
fjarrkontrollens MENU-, TV- och "i"-knappar succesivt.
SELECTION DU MODE SERVICE: Mettre le recepteur en marche a I'aide de I'interrupteur principal et dans les 5
secondes appuyez successivement sur les touches MENU, TV, et "i" de la
telecommande.
SELEZIONE DEL MOD0 SERVIZIO: Accendere il ricevitore tramite I'interruttore generale e premere in sequenza i
tasti del telecomando MENU, TV e `7" entro 5 secondi.
A menu B menu
A menu NVRAM (ICf2)
lnitialization of NVRAM
The NVRAM must be initialized and configured, if the NVRAM is
replaced or it has totally lost its data. The next procedure is
assuming that the tv does not start at all due to wrong data in
NVRAM.
1. Set the receiver to the service mode by switching on the
receiver with the main switch and within 5 s. pressing the
buttons MENU, TV and "i" successively.
Note! The receiver is in the service mode although it looks
like the receiver is in stand-by mode!
2. Press the RED-button to pre-configurate the set. Green led
will flash once to indicate this.
Language selection 3a At the same time the controller will check NVRAM and
1. Pressthe MENU button (under the lid). initialize it automatically if it was "empty". lnitializing will
2. Select the SET-UP with the cursor buttons (up-/downwards) take about 15s. When it is completed, the green led will light
and press the OK button. up. continue from item 4.
3. Select the LANGUAGE and press the OK button. 3b The automatic initializing did not happen, if the green led
4. Select the desired language and press the OK button. does not light up steady. In some cases the led might also
5. Press the TV button to exit. light up immediately after configuration without any
initializing, depending on NVRAM contents. In this case it
Manual tuning ' might be enough to to store the new configuration by
) 1. Select programme number you want to tune.
1 Press the MENU button.
pressing "OK" and continue from item 4.
3c If the automatic initializing did not happen, you can start it
; : Select TUNING and press the OK button. manually by entering the key code: BLUE (wait approx. 2~1,
4. Press the red button (SEARCH). 2,5,4 (wait approx. 2s) and OK. lnitializing will take about
5. Press the OK button to store. 15s.
6. Press the TV button to exit. 4. Switch off the receiver by pressing the mains switch.
5. Set the receiver to the service mode by switching on the
receiver with the main switch and within 5 s. pressing the
APSi (Automatic Programming System)
buttons MENU, TV and "i" successively. If the receiver
1. Press the MENU button.
remains in stand-by mode, press the TV button twice and
2. Select SET-UP and press the OK button.
then press the "i" button.
3. Select RETUNE TV and press the OK button.
6. Configurate the receiver by pressing the RED button. The
4. To retune the channels, press the OK button.
configuration menu will show up.
5. Press theTV button to exit.
7. Press the OK button.
8. Press the TV-button and tune in one or more tv channels.
9. Return to service mode by pressing "i" button
10. After that make all of the service adjustments (see section
B menu "SERVICE ADJUSTMENTS VIA IIC BUS").
11. Switch off the receiver by pressing the mains switch.
Language selection
1. Press the PRG button.
2. Select the Install by pressing the blue button.
3. Select the Language by pressing the red button.
4. Select the desired language with the cursor buttons and
press the OK button.
5. Press the TV button to exit.
Manual tuning
1. Press the PRG button.
2. Press the red button (Tune).
3. Press the red button (Search).
4. Select the prog. number on which the channel is to be stored.
5. Press the blue button (Store) to store.
6. Press the TV button to exit.
APSi (Automatic Programming System)
1. Press the PRG button.
2. Press the blue button (Install).
3. Press the yellow button (Reprog).
4. Press the red button (APSi).
5. Press the green button (Reprog).
6. Press the blue button (OK) to exit.
SERVICE MODE SELECTION OPTION BYTE DESCRIPTIONS
1. The receiver is set to the service mode by switching on the
,
1
I
receiver with the mains switch and within 5 seconds pressing Bit Description Setting '0'
the remote control buttons MENU, TV and "i" successively.
76543210
Note! If the receiver remains in stand by mode after selecting
the service mode, switch on the receiver by pressing the TV
IIC DEV 1 m I
button twice and select the service mode by pressing the 7" 0 TV tuner Yes No
button. 1 Decoder TDA9141 Yes No
3 Feature box controller (IPQ) Yes No
4 Deflection controller TDA9151 Yes No
5 RGB processor TDA4780 Yes No
6 Video switch TDA6417 Yes No
7 PIP controller SDA9188 Yes No
In the service mode an adjustment menu (including the adjust-
IlC DEV 2 I
ment number and name, initializing (left) and adjustment (right)) 0 PIP tuner Yes No
values is shown on the screen. 2 Megatext SDA5273 Yes No
7 MSP3400 / 3410 Yes No
2. Return from the service mode by switching off the receiver
with the mains switch.
CONFIGURATION AND FAULT DIAGNOSIS 0 DPL (AR600) Yes No
The set must be configured after adding or removing some 1 Subwoofer Yes No
options. By pressing the RED button in the service mode, the 4 Comb filter (SVHS line low) Yes No
processor checks all possible addresses of bus driven circuits
6 DPL (AR6021 Yes No
and shows the settings on the screen.
This feature can also be used in fault finding; if an option bit is
not `1' when it should be, the IC is either not present or faulty. In
DEjP WT 1 11111111It111111 I
the configuration mode it is possible to enable/disable options O-2 Loudspeaker configuration (set in user mode)
for testing purposes. 4 Bass splitting (normally yes, manual) Yes No
6 TV-speaker pre-equalisation (manual) Yes No
Changing of option bytes
1. When in service mode, select the configuration mode by TXT OPT 2 [~I~IWI~I~~ 1
pressing the RED button.
0 TXT with external RAM Yes No
2 Flof text enabled (manual) Yes No
4 Text sync mode (manual) Yes No
5 Text subpage rolling (manual) Yes No
SYfi OPT 1 m III11
UI
Camera connector installed (manual) Yes No
RGB El Yes No
NTSC 3.58 MHz Yes No
ACI enabled (manual) Yes No
NICAM enabled (manual) Yes No
Loudness enabled (manual) Yes No
sr!j OPT 2 1l~lIl~l~l~l~l~l 11
0 Start TV with mains No Yes
6 Start TV to demo mode (manual) Yes No
7 Hotel TV functions enabled (manual) Yes No
Description
IF OF-f- 5 [IIIIIIIIIIIII~ 1
SW VER. = uP software version.
IPQVER. = Feature box uP software version
B/G system Yes No
NVM VER. = NVM software version.
I system Yes No
D/K system Yes No
2. Select IIC Device byte 1 - 4 or Option byte 1 5 with the cursor
L/L' system Yes No
button (up-/downwards). Selected byte is shown highligthed.
Baseband Yes No
3. Set the bits with the number buttons (0 7).
4. Store the settings by pressing the OK button. Only UHF tuner (manual) Yes No
5. Return to the service mode by pressing the RED button again.
UIF FLAG5 2 IIIIIJ[I
11
OEM option (manual) Yes No
Remote control buttons in service mode
When the receiver is in service mode you can select the normal
TV mode by pressing the TV button and return to the service
mode by pressing the "i" button.
Number and cursor buttons are used for service adjustment. 2. Adjust with the cursor button (left/right).
The yellow button hides temporarily the service menu. The OK
button stores the settings.
Adjustment for different picture format
First make all adjustments with normal 4:3 picture format. The
TV uses these adjustment values for all picture formats if no
other adjustment were made. In each adjustment it is mentioned 3. Store the new value by pressing the OK button
if the adjustment must be done separately for different picture
format, repeate only those adjustments. Note!
l To avoid incomplete adjustments store each adjustment in the
Making the service adjustment memory immediately after adjusting.
1. Give a two numbered code which determines the adjustment lIf the adjustment has to be made separately for different
(e.g. 05 = horizontal phase, see the following tables) with the picture format, select the normal user mode by pressing the TV
number buttons. button and change the picture format with the zoom button.
Return to service mode by pressing the ibutton.
Note! The adjustments can also be selected with the cursor
button (up-/downwards).
VERTICAL PICTURE ADJUSTMENTS
Adjustment Code OSD Init. Note!
name value
Vertical amplitude 00 V-ampl. 34 Adjust the picture height to correct ratio.
Vertical amplitude 16:9 Note! Separate adjustments for normal 4:3, normal 16:9
Vertical amplitude 16:9 zoom and 16:9 zoom picture format.
Vertical off-centre shift 01 V-shift 4
Vertical start scan. 02 V-start 0
Vertical S-correction 03 S-corr. 49 Note! Separate adjustments for normal 4:3, normal 16:9
Vertical S-correction 16:9 and 16:9 zoom picture format.
Vertical S-correction 16:9 zoom
Vertical slope 4:3 zoom (coarse) 12 Zoom-H 71 Select 4:3 zoom picture format and adjust the picture to
Vertical slope 4:3 zoom (fine) 13 Zoom-L 0 correct ratio.
Center value, 4:3 zoom shift (V-wait) 14 Shift 23 Note! Before adjustment select 4:3 zoom picture format
HORIZONTAL PICTURE ADJUSTMENTS
Adjustment Code OSD Init. Note!
name value
EW width 04 Width 42
Horizontal phase 05 H-shift 33 Note! Separate adjustments for normal 4:3 and 4:3zoom
H-phase zoom picture format.
H-phase RGB In addition make same adjustments by using RGB signal.
H-phase RGB zoom
EW parabola 06 Parab. 24 Note! Separate adjustments for normal 4:3, normal 16:9
EW parabola 16:9 and 16:9 zoom picture format.
EW parabola 16:9 zoom
EW corner 07 Corner 25 Note! Separate adjustments for normal 4:3, normal 16:9
EW corner 16:9 and 16:9 zoom picture format.
EW corner 16:9 zoom
EW trapezium 08 Trapezium 5
EHT compensation 09 EHT 6 Set brightness and contrast to 90% and compensate the
change in picture size.
OTHER ADJUSTMENTS
Adjustment Code OSD Init. Note!
name value
Red reference 20 R ref. 52 Note! This procedure is necessary e.g. when the picture
Green reference 21 G ref. 21 tube, CRT-module etc. has been replaced.
Blue reference 22 B ref. 16 Apply a test picture and adjust the R, G and B references.
Then adjust the R, G and B gains.
Red gain 17 R gain 41
Green gain 18 G gain 32
Blue gain 19 B gain 32
Clamp shift 11 Clamp 3 Normally no need to adjust.
Peak white limit 23 PWL 63 Normally no need to adjust.
Gamma correction 24 GAMMA 32 Normally no need to adjust.
Tuner AGC 25 TV AGC 170 Apply a 1 mV (60 dBpV) test signal.
Adjust the picture just without noise.
0 POWER SUPPLY BLOCK
Supply voltage and protection circuit
Set brightness and contrast to normal level. Connect a
4-P
universal voltmeter to the cathode of Do1 1.
Clamp pulse --------
Adjust with Ro45 the DC voltage for +I40 V (*I V) or 145 V (*I
V) depending on the picture tube type, look at the schematic
diagram.
Check the over-current protection after making any service 140v
operations in the primary circuit of the power supply. Set the 1
receiver to the stand-by mode. Short circuit the cathode of Do
13 to the ground and keep the short circuit connected. When
the over-current protection works correctly, the power supply
will try to start 2-3 times before it stops definitely. Remove
the short circuit and switch on the receiver by pressing the
mains button.
HORIZONTAL DEFLECTION BLOCK LL PICTURE AND SOUND IF MODULE
Horizontal linearity Video demodulator
Adjust with Lk2. 1. Apply a test signal (1 mV = 60 dBpV).
2. Connect a universal voltmeter to the module connector Xl
Focusing
pin 6.
Set brightness and contrast to normal level. Use cross hatch
pattern and adjust the picture for optimum resolution. 3. Adjust with Ll6 the DC voltage to the point where it changes
from 0 to 5 V.
(Screen grid voltage) Ug2 voltage
Set contrast to minimum, brightness and colour saturation to Sound demodulator
normal level. 1. Apply a CCIR B/G standard (FM modulated sound) test signal.
At the end of the vertical blanking, there is a black current 2. Connect a universal voltmeter to ICI1 pin 13.
measurement pulse (clamp pulse) at pin 9 of IChl, ICh2 and
ICh3. Use an oscilloscope and find the output stage with the 3. Adjust with LII the DC voltage for +3.7 V.
highest cut-off (i.e. the highest voltage during the black
current measurement pulse).
Adjust the voltage of the clamp pulse to +I40 V with Ug2 (see
figure).