Text preview for : FX Ch_6395_7195_7496_7497.pdf part of Nokia Nokia_FX_chassis_6395_7195_7496_7497-Finlux_Salora Nokia_FX_chassis_6395_7195_7496_7497-Finlux_Salora
Back to : Nokia_FX_chassis_6395_719 | Home
FEATURE STEREO FX-CHASSIS
TV
1996
Service manual Service-Manual Serviceanvisning
a
Manuel de service
@I Manuale di servizio
NOlSupplement
6395 29VlOO
7195
7496
7497
7497DPL
71 U2/74U2
IOOHz
to Service Manual 6611 73 78
Subwoofer
5
PP
ICf3
SDA cc-
M3L 211 391
1 36, 43, 44 I
J,
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. Einschalten Sie das Gerat mit dem Netzschalter und, innerhalb 5 Sekunden driicken Sie nacheinander die Fernbedienungstasten MENU, TV und "7. Sla pa mottagaren med huvudstrombrytaren och inom 5 s. tryck pa fjarrkontrollens MENU-, TV- och "i"-knappar succesivt. 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. Accendere il ricevitore tramite I'interruttore generale e premere in sequenza i tasti del telecomando MENU, TV e `7" entro 5 secondi.
WAHL DES SERVICE-MODUS: VAL AV SERVICE-L2iGE: SELECTION SELEZIONE DU MODE SERVICE: DEL MOD0 SERVIZIO:
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. 3a At the same time the controller will check NVRAM and initialize it automatically if it was "empty". lnitializing will take about 15s. When it is completed, the green led will light up. continue from item 4. 3b The automatic initializing did not happen, if the green led does not light up steady. In some cases the led might also light up immediately after configuration without any initializing, depending on NVRAM contents. In this case it might be enough to to store the new configuration by pressing "OK" and continue from item 4. did not happen, you can start it 3c If the automatic initializing manually by entering the key code: BLUE (wait approx. 2~1, 2,5,4 (wait approx. 2s) and OK. lnitializing will take about 15s. 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 buttons MENU, TV and "i" successively. If the receiver remains in stand-by mode, press the TV button twice and then press the "i" button. 6. Configurate the receiver by pressing the RED button. The configuration menu will show up. 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 (see section 10. After that make all of the service adjustments "SERVICE ADJUSTMENTS VIA IIC BUS"). 11. Switch off the receiver by pressing the mains switch.
(under the lid). 2. Select the SET-UP with the cursor buttons (up-/downwards) and press the OK button. 3. Select the LANGUAGE and press the OK button. 4. Select the desired language and press the OK button. 5. Press the TV button to exit.
Language selection 1. Pressthe MENU button
)
Manual tuning
'
number you want to tune. 1. Select programme 1 Press the MENU button. ; : Select TUNING and press the OK button. 4. Press the red button (SEARCH). 5. Press the OK button to store. 6. Press the TV button to exit.
APSi (Automatic Programming System)
1. 2. 3. 4. 5. Press the MENU button. Select SET-UP and press the OK button. Select RETUNE TV and press the OK button. To retune the channels, press the OK button. Press theTV button to exit.
B menu
Language selection
1. 2. 3. 4. Press Select Select Select press 5. Press the PRG button. the Install by pressing the blue button. the Language by pressing the red button. the desired language with the cursor buttons the OK button. the TV button to exit.
and
Manual tuning
1. 2. 3. 4. 5. 6. Press Press Press Select Press Press the PRG button. the red button (Tune). the red button (Search). the prog. number on which the channel the blue button (Store) to store. the TV button to exit.
is to be stored.
APSi (Automatic Programming System) 1. Press the PRG button.
2. 3. 4. 5. 6. Press Press Press Press Press the the the the the blue button (Install). yellow button (Reprog). red button (APSi). green button (Reprog). blue button (OK) to exit.
SERVICE MODE SELECTION
1. The receiver is set to the service mode by switching on the receiver with the mains switch and within 5 seconds pressing the remote control buttons MENU, TV and "i" successively. Note! If the receiver remains in stand by mode after selecting the service mode, switch on the receiver by pressing the TV button twice and select the service mode by pressing the 7" button.
OPTION BYTE DESCRIPTIONS
Bit Description Setting
76543210
,
1
I
'0'
IIC
0 1 3 4 5 6 7 TV tuner Decoder Feature Deflection
DEV 1 m
I
Yes Yes Yes
Yes
TDA9141 box controller controller (IPQ) TDA9151
No No No
No No No No
RGB processor Video switch PIP controller
TDA4780 TDA6417 SDA9188
Yes
Yes
Yes
In the service mode an adjustment menu (including the adjustment number and name, initializing (left) and adjustment (right)) values is shown on the screen. 2. Return from the service with the mains switch. mode by switching off the receiver
IlC
0 2 7 PIP tuner Megatext MSP3400
DEV 2
SDA5273 / 3410
I
Yes Yes Yes No No No
CONFIGURATION AND FAULT DIAGNOSIS
The set must be configured after adding or removing some options. By pressing the RED button in the service mode, the processor checks all possible addresses of bus driven circuits 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 the configuration mode it is possible to enable/disable options for testing purposes.
0 1 4 6
DPL (AR600) Subwoofer Comb filter DPL (AR6021 (SVHS line low)
Yes Yes Yes Yes
No No No No
DEjP
O-2 4 6 Loudspeaker Bass splitting TV-speaker
WT
1
11111111It111111
yes, manual) (manual)
I
Yes Yes
configuration (normally pre-equalisation
(set in user mode)
No No
Changing of option bytes
1. When in service mode, select the configuration pressing the RED button. mode by 0 2 4 5
TXT
OPT 2
RAM
[~I~IWI~I~~
1
Yes Yes Yes Yes
TXT with external Flof text enabled Text subpage
(manual) (manual)
Text sync mode (manual) rolling
No No No No
SYfi
Camera RGB El
OPT
connector
1
m
III11
UI
installed
(manual)
Yes Yes Yes Yes Yes Yes
11
NTSC 3.58 MHz ACI enabled NICAM Loudness sr!j 0 6 7 Description SW VER. = uP software version. IPQVER. = Feature box uP software NVM VER. = NVM software version. (manual) (manual) (manual) enabled
enabled OPT mains
No No No No No No
2
1l~lIl~l~l~l~l~l
Start TV with
No (manual) (manual)
1
Yes
Start TV to demo Hotel TV functions
mode
Yes Yes
enabled
No No
IF
version B/G system I system D/K system L/L' system Baseband
OF-f- 5
[IIIIIIIIIIIII~
Yes Yes Yes Yes Yes (manual) Yes
2. Select IIC Device byte 1 - 4 or Option byte 1 5 with the cursor button (up-/downwards). Selected byte is shown highligthed. 3. Set the bits with the number buttons (0 7). 4. Store the settings by pressing the OK button. 5. Return to the service mode by pressing the RED button again.
Only UHF tuner
No No No No No No
UIF
OEM option
FLAG5
(manual)
2
IIIIIJ[I
11
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. The yellow button hides temporarily the service menu. The OK button stores the settings.
2. Adjust
with the cursor
button
(left/right).
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 if the adjustment must be done separately for different picture format, repeate only those adjustments.
3. Store the new value by pressing
the OK button
Making the service adjustment
1. Give a two numbered code which determines the adjustment (e.g. 05 = horizontal phase, see the following tables) with the number buttons. Note! The adjustments button (up-/downwards). can also be selected with the cursor
Note! To avoid incomplete adjustments store each adjustment in the memory immediately after adjusting. If the adjustment has to be made separately for different picture format, select the normal user mode by pressing the TV button and change the picture format with the zoom button. Return to service mode by pressing the ibutton.
l l
VERTICAL PICTURE ADJUSTMENTS
Adjustment Code OSD name V-ampl. Init. value 34 Note!
Vertical Vertical Vertical Vertical Vertical Vertical Vertical Vertical Vertical Vertical
amplitude amplitude amplitude off-centre start scan. S-correction S-correction S-correction
00 16:9 16:9 zoom shift 01 02 03 16:9 16:9 zoom 12 13 14
Adjust the picture height to correct ratio. Note! Separate adjustments for normal 4:3, normal and 16:9 zoom picture format.
16:9
V-shift V-start S-corr.
4 0 49 Note! Separate adjustments for normal and 16:9 zoom picture format. 4:3, normal 16:9
slope 4:3 zoom (coarse) slope 4:3 zoom (fine) (V-wait)
Zoom-H Zoom-L Shift
71 0 23
Select 4:3 zoom picture correct ratio. Note! Before adjustment
format
and adjust the picture
to
Center value, 4:3 zoom shift
select 4:3 zoom picture
format
HORIZONTAL PICTURE ADJUSTMENTS
Adjustment Code OSD name Width H-shift Init. value 42 33 Note! Separate adjustments for normal 4:3 and 4:3zoom picture format. In addition make same adjustments by using RGB signal. Note!
EW width Horizontal phase H-phase zoom H-phase RGB H-phase RGB zoom EW parabola EW parabola EW parabola EW corner EW corner EW corner
04 05
06 16:9 16:9 zoom 07
Parab.
24
Note! Separate adjustments for normal and 16:9 zoom picture format.
4:3, normal
16:9
Corner
25
16:9 16:9 zoom 08 09 Trapezium EHT 5 6
Note! Separate adjustments for normal and 16:9 zoom picture format.
4:3, normal
16:9
EW trapezium EHT compensation
Set brightness and contrast change in picture size.
to 90% and compensate
the
OTHER ADJUSTMENTS
Adjustment Red reference Green reference Blue reference Red gain Green gain Blue gain Clamp shift Peak white limit Gamma correction Tuner AGC Code 20 21 22 17 18 19 11 23 24 25 OSD name R ref. G ref. B ref. R gain G gain B gain Clamp PWL GAMMA TV AGC Init. value 52 21 16 41 32 32 3 63 32 170 Normally no need to adjust. Normally no need to adjust. Normally no need to adjust. Apply a 1 mV (60 dBpV) test signal. Adjust the picture just without noise. Note! Note! This procedure is necessary e.g. when the picture tube, CRT-module etc. has been replaced. Apply a test picture and adjust the R, G and B references. Then adjust the R, G and B gains.
0
POWER SUPPLY
BLOCK
Supply voltage and protection circuit
Set brightness and contrast to normal level. Connect a universal voltmeter to the cathode of Do1 1. 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 operations in the primary circuit of the power supply. Set the 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. Clamp pulse --------
4-P
140v
1
HORIZONTAL
Horizontal linearity
Adjust with Lk2.
DEFLECTION
BLOCK
LL
PICTURE
AND SOUND
IF MODULE
Video demodulator
1. Apply a test signal (1 mV = 60 dBpV). 2. Connect a universal voltmeter to the module connector Xl pin 6. 3. Adjust with Ll6 the DC voltage to the point where it changes from 0 to 5 V.
Focusing
Set brightness and contrast to normal level. Use cross hatch pattern and adjust the picture for optimum resolution.
(Screen grid voltage) Ug2 voltage
Set contrast to minimum, brightness and colour saturation to normal level. At the end of the vertical blanking, there is a black current measurement pulse (clamp pulse) at pin 9 of IChl, ICh2 and ICh3. Use an oscilloscope and find the output stage with the 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).
Sound demodulator
1. Apply a CCIR B/G standard (FM modulated sound) test signal. 2. Connect a universal voltmeter to ICI1 pin 13. 3. Adjust with LII the DC voltage for +3.7 V.