Nokia 6395, 7195, 7496, 7497 DPL Service Manual

FEATURE STEREO FX-CHASSIS

Service manual Service-Manual Serviceanvisning

NOl<lA 6395 7195

a Manuel de service @I Manuale di servizio

7496 7497

SALORA 29VlOO

FIN UJX

Supplement to Service Manual 6611 73 78

71 U2/74U2 IOOHz

1996

7497DPL

Subwoofer 5

ICf3

211 391 36, 43, 44

SERVICE MODE SELECTION:

WAHL DES SERVICE-MODUS:

VAL AV SERVICE-L2iGE:

SELECTION DU MODE SERVICE:

SELEZIONE DEL MOD0 SERVIZIO:

SDA

cc-

M3L 1

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.

A menu

B menu

A menu

Language selection

1. Pressthe MENU button (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.

Manual tuning ’

Select programme number you want to tune.

1. 1

Press the MENU button. Select TUNING and press the OK button.

; :

Press the red button (SEARCH). Press the OK button to store.

5. Press the TV button to exit.

APSi (Automatic Programming System)

1. Press the MENU button.

2. Select SET-UP and press the OK button.

3. Select RETUNE TV and press the OK button.

4. To retune the channels, press the OK button.

5. Press theTV button to exit.

B 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.

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!

Press the RED-button to pre-configurate the set. Green led will flash once to indicate this. 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.

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. If the automatic initializing did not happen, you can start it

manually by entering the key code: BLUE (wait approx. 2~1, 2,5,4 (wait approx. 2s) and OK. lnitializing will take about

15s.

Switch off the receiver by pressing the mains switch.

4. Set the receiver to the service mode by switching on the

5. 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.

Configurate the receiver by pressing the RED button. The configuration menu will show up.

Press the OK button. Press the TV-button and tune in one or more tv channels.

8. Return to service mode by pressing “i” button

After that make all of the service adjustments (see section

10. “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

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

IIC DEV 1 m

0 TV tuner

Decoder TDA9141

Feature box controller (IPQ)

Deflection controller TDA9151

RGB processor TDA4780 6 Video switch TDA6417 7

PIP controller SDA9188

, I

'0'

Yes No Yes No Yes No

Yes No

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 mode by switching off the receiver with the mains switch.

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.

Changing of option bytes

1. When in service mode, select the configuration mode by pressing the RED button.

IlC DEV 2

0 PIP tuner 2

Megatext SDA5273

MSP3400 / 3410

0 DPL (AR600)

Subwoofer

Comb filter (SVHS line low)

DPL (AR6021

DEjP WT 1 11111111It111111

O-2

Loudspeaker configuration (set in user mode)

Bass splitting (normally yes, manual) Yes No

TV-speaker pre-equalisation (manual)

TXT OPT 2 [~I~IWI~I~~ 1

TXT with external RAM Yes No

Flof text enabled (manual) Yes No

Text sync mode (manual) Yes No

Text subpage rolling (manual) Yes No

SYfi OPT 1

Camera connector installed (manual)

RGB El Yes NTSC 3.58 MHz

ACI enabled (manual) Yes

NICAM enabled (manual) Loudness enabled (manual) Yes

III11

Yes No Yes No Yes No

Yes No Yes No Yes No Yes No

Yes

No No No No No No

Description

SW VER. = uP software version.

IPQVER. = Feature box uP software version NVM VER. = NVM software version.

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.

l~lIl~l~l~l~l~l

sr!j OPT 2

Start TV with mains No

Start TV to demo mode (manual)

Hotel TV functions enabled (manual) Yes

B/G system Yes I system Yes D/K system Yes L/L’ system Yes Baseband Only UHF tuner (manual) Yes No

OF-f- 5 [IIIIIIIIIIIII~ 1

UIF FLAG5

OEM option (manual) Yes No

IIIIIJ[I

Yes

No No

No No No No

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.

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.

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 can also be selected with the cursor button (up-/downwards).

VERTICAL PICTURE ADJUSTMENTS

Adjustment

Vertical amplitude Vertical amplitude 16:9 Vertical amplitude 16:9 zoom

Code OSD

name

00 V-ampl.

2. Adjust with the cursor button (left/right).

3. Store the new value by pressing the OK button

Note!

l To avoid incomplete adjustments store each adjustment in the

memory immediately after adjusting.

l 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 i button.

Init. Note!

value

34 Adjust the picture height to correct ratio.

Note! Separate adjustments for normal 4:3, normal 16:9 and 16:9 zoom picture format.

Vertical off-centre shift

Vertical start scan.

Vertical S-correction Vertical S-correction 16:9 Vertical S-correction 16:9 zoom

Vertical slope 4:3 zoom (coarse) Vertical slope 4:3 zoom (fine)

Center value, 4:3 zoom shift (V-wait)

01 V-shift

02 V-start

03 S-corr.

12 Zoom-H 13 Zoom-L

14 Shift

HORIZONTAL PICTURE ADJUSTMENTS

Adjustment

EW width

Horizontal phase H-phase zoom H-phase RGB H-phase RGB zoom

EW parabola EW parabola 16:9 EW parabola 16:9 zoom

Code OSD

04 Width

05 H-shift

06 Parab. 24

name

49 Note! Separate adjustments for normal 4:3, normal 16:9

and 16:9 zoom picture format.

23 Note! Before adjustment select 4:3 zoom picture format

Init.

value

Select 4:3 zoom picture format and adjust the picture to

0 correct ratio.

Note!

Note! Separate adjustments for normal 4:3 and 4:3zoom picture format. In addition make same adjustments by using RGB signal.

Note! Separate adjustments for normal 4:3, normal 16:9 and 16:9 zoom picture format.

EW corner EW corner 16:9 EW corner 16:9 zoom

EW trapezium EHT compensation

07 Corner 25 Note! Separate adjustments for normal 4:3, normal 16:9

and 16:9 zoom picture format.

08 Trapezium 5 09 EHT 6 Set brightness and contrast to 90% and compensate the

change in picture size.

OTHER ADJUSTMENTS

Adjustment

Red reference Green reference Blue reference

Red gain Green gain

Blue gain

Code

20 21 22

17 18 19

OSD

name value

R ref. 52

G ref.

B ref. 16

R gain G gain 32 B gain 32

Init. Note!

21 tube, CRT-module etc. has been replaced.

Note! This procedure is necessary e.g. when the picture

Apply a test picture and adjust the R, G and B references.

Then adjust the R, G and B gains.

Clamp shift

Peak white limit

Gamma correction

Tuner AGC

Clamp 3

PWL 63

GAMMA 32

TV AGC 170

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.

Normally no need to adjust.

Apply a 1 mV (60 dBpV) test signal. Adjust the picture just without noise.

Clamp pulse --------

4-P

140v

HORIZONTAL DEFLECTION BLOCK

Horizontal linearity

Adjust with Lk2.

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).

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.

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.

+ 18 hidden pages