Sony VTX-D800U Manuale utente

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Service Manual

SERVICEMANUALSERVICEMANUAL

SERVICEMANUAL

DIGITAL RECEIVER

Magellan IIMagellan II

Magellan IICHASSISCHASSIS

CHASSISCHASSIS

CHASSIS

MODEL

COMMANDER DEST

VTX-D800UVTX-D800U

VTX-D800U

RM-X800 UK

VTX-D800NVTX-D800N

VTX-D800N

RM-X800 FINLAND/SWEDEN

VTX-D800EVTX-D800E

VTX-D800E

RM-X800 ESP

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Service Manual

TABLE OF CONTENTS

Safety Warning. .................... 3

Tools Required. .................... 3

1 Dissassembly .................... 4

1.1 Cover Removal. .................... 4

1.2 Front Panel Removal. .................... 4

1.3 B Board Removal. .................... 5

1.4 Chassis Removal. .................... 5

2 Service Mode [TT Mode] .................... 6

2.1 Special Key Sequence .................... 6

2.2 Special Remote Commander Data Code .................... 6

2.3 Exiting TT Mode .................... 6

3 Entering the TT Command Number .................... 7

3.1 Cancelling a Command Entry .................... 7

3.2 Example .................... 7

4 List of TT Commands .................... 8

5 Power Supply .................... 11

5.1 Power Supply Detailed Description .................... 12

6Technical Specifications ..................... 15

7 Device descriptions. .................... 19

8 Diagrams

8.1 Block Diagram. .................... 21

8.2 B board PWB layout. .................... 22

8.3 B board circuit diagram.

8.3.1 Multimedia Processor & Clock Generator .................... 23

8.3.2 Front Panel & Reset .................... 24

8.3.3 Power Supply .................... 25

8.3.4 Audio DAC & Smartlink Switch .................... 26

8.3.5 AV Switch & SCART .................... 27

8.3.6 Tuner NIM .................... 28

9 Exploded View . .................... 29

10 Electrical Parts List. .................... 30

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Service Manual

Dangerously high voltages exist on the Power Supply Unit (PSU) PWB (See Fig 1).

FORTHIS REASON,THE RECEIVER MUST ALWAYS BE DISCONNECTED FROMTHE MAINS SUPPLY

BEFORE ANY WORK DETAILED INTHIS MANUAL IS CARRIED OUT.

CAUTION !!!

Anti-static precautions should be taken when handling the PWB. Once removed from its fixings, the PWB can

become flexible. Care should be taken to avoid damage to the PWB or components.

All fixings must be replaced correctly for correct performance and continued safety compliance.

Tools Required

Safety Warning

Caution High Voltage

Fig. 1

Philips Screwdriver

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Service Manual

Remove the foot by releasing the clips circled and easing the foot carefully away from the unit. Remove the 2

screws located at the rear of the unit (shown arrowed). Lift the front of the cover slightly and slide towards the rear

of the unit until it is clear. Reassembly is the reversal of removal.

1.1 Cover Removal

1.2 Front Panel Removal

Remove the cover as indicated above. Carefully unhook the front panel locating clips from the chassis, pull the

front panel gently forward and lift clear.

Clip located

on both sides

of Front panel

Lift cover

gently at this

point.

1 Dissassembly

==>

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Service Manual

Remove the cover and front panel as indicated in [1-1] and [1-2]. Disconnect CN600 power cord and remove from

unit. Remove the 1 Philips screw from the rear panel. Remove the 3 Philips screws from the circuit booard. The B

board can then be lifted clear of the chassis.

[ 1.3 ] B Board Removal

==>

CN600

Screw

Screws

To remove, lift the front of the chassis slightly to clear the stops and slide forward out of the bottom cover.

[ 1.4 ] Chassis Removal

Stops

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Service Manual

2 Service Mode [TT mode]

There are 2 possible mechanisms for starting TT mode on Sony cook STB’s…

2.1 Special key sequence

The following key sequence entered via the standard remote commander for a particular STB can enable TT

mode. This sequence must be entered…

(1) In full, with no deviation from the sequence from first to last.

(2) With the STB in Standby mode at the start of the sequence.

Sequence number Key

1 DIGIT 1

2 DIGIT 9

3 LEFT CURSOR

4 BLUE

Should the STB be in active standby at any time (i.e. during software upgrade) it shall not be possible to enter

TT mode.

2.2 Special remote commander data code

It is considered that the sequence described in section 2.1 above is too complex for automated machinery to

enter reliably without the possibility to confuse the state of the STB, therefore in order to aid manufacture the

SIRCS standard defines that in each remote control category the data code ‘1111111’ (0x7f) shall be reserved

and can be used to enter test mode.

For Cook STB products this SIRCS code shall enter TT mode and is valid in the following conditions…

(1) If the unit is in standby. At which point the STB will come out of standby

(2) When the unit is not is standby and there is no menu displayed

(3) When the unit is not tuning (automatically or manual)

(4) Then the unit is not displaying interactive services

The category code is different between each equipment type (DTT, etc) and the correct category code

must be received according to the equipment type.

The test code shall not be made available on any consumer remote commander equipment.

2.3 Exiting TT mode

TT mode can be exited using one of the following mechanisms…

(1) Removing the power to the STB

(2) Placing the STB into Standby mode

(3) Entering the command ‘0’

After TT mode is exited any changes to the state of the box will still be effective. It is better to force a box

reset post-TT mode.

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Service Manual

3 Entering the TT command number

The TT number is entered using the standard digit keys using the category defined for the STB type. Category

codes for equipment types other than this STB’s type must be rejected.

Depending on the type of equipment the number of digits available for commands will vary. Leading zero can

be omitted. If the full compliment of digits is not entered a 3 second time -out period will be required to elapse

before the command is activated. Automated entry mechanisms such as those used during manufacturing

should enter the full compliment of digits in order to avoid the STB and controller getting out of sync.

The following are defined digit lengths for current planned models…

Model Number of digits

VTX-D800U 3

VTX-D800E 3

VTX-D800N 3

3.1 Cancelling a command entry

Entering a ‘0’digit after any other digit entry (thus making the command a multiple of 10) will immediately

reset the display and perform no action.

3.2 Example

VTX-D800U requires 3 digits. Therefore the following sequences would be valid to issue a test command…

Sequence Result

0 ⇒1 ⇒4 Executes command 14

1 ⇒4 ⇒Timeout after 3 seconds Executes command 14

1 ⇒0 Does not execute any command (cancels input)

0 ⇒Timeout after 3 seconds Cancels TT mode

0 ⇒0 ⇒0 Cancels TT mode

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Service Manual

4 List of TT commands

Depending on the STB model the number of digits which are capable of being entered will vary, therefore any

leading zero have been omitted from the TT number defined in the list. Entries should be made according to

the description in section 3.

All commands ending in zero (ie. 0, 10, 20, 30, 40) etc reset the display, cancelling partially entered

commands.

All settings, except those marked “Permanent”, are reset after a power cycle.

TT Name Description Permanent Supported

0 Revert to normal Stops TT mode and returns the STB to normal active

mode.

It does not necessarily revert to the mode of

operation prior to TT mode being entered.

1 STB reset Force the box to reset

This resets the state of the box to just powered on.

STB will power on in standby mode.

6 Factory reset &

reboot

Reset all settings to defaults (shipping)

Reboot

Yes

Factory reset Reset all settings to defaults (shipping) Yes

8 Shipping default

& reboot

Set the box to shipping condition

Tune database is cleared

Reboot - Start-up menu will be activated

Yes

9 Shipping default Set the box to shipping condition

Tune database is cleared

Yes

SCART/AV

11 Colour bar ON Enable colour bar output on TV & VCR SCART

hen colour bar is enabled the OSD cannot be seen.

12 Colour bar OFF Disable colour bar output on TV & VCR SCARTS

13 Smart link test Sends a sequence of commands to the AV link bus.

Appendix A shows the sequence sent.

14 Scart control off Sets pin 8 on all SCART sockets to 0V No

15 Scart control 16:9 Sets pin 8 on all SCART sockets to 16:9 level No

16 Scart control 4:3 Sets pin 8 on all SCART sockets to 4:3 level No

Common interface

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Service Manual

31 Slot 0 bypass Transport stream is set to bypass slot 0.

This command is effective only when there is no CAM

inserted into slot 0.

32 Slot 0 pass thru Transport stream is set to pass out/in slot 0.

This command is effective only when there is no DVB

compliant CAM inserted into slot 0.

If there is no output/input device then the demux will

not receive a valid transport stream.

33 Slot 1 bypass Transport stream is set to bypass slot 1.

This command is effective only when there is no CAM

inserted into slot 1.

34 Slot 1 pass thru Transport stream is set to pass out/in slot 1.

This command is effective only when there is no DVB

compliant CAM inserted into slot 1.

If there is no output/input device then the demux will

not receive a valid transport stream.

Software upgrade

41 Upgrade Serial Forces a software upgrade from the serial port

STB will reset after loading & TT mode will be

cancelled

Yes

42 Upgrade Ethernet Forces a software upgrade from the Ethernet port (if

available)

STB will reset after loading & TT mode will be

cancelled

Yes No

43 Upgrade off-air Forces a software upgrade from the current service

A change of service, satellite, etc will be done as

required.

STB will reset after loading & TT mode will be

cancelled

Yes

44 Upgrade Memory

stick

Forces a software upgrade from the Memory stick (if

available)

STB will reset after loading & TT mode will be

cancelled

Yes

49 Allow downgrade On next SW update, update the software even if the

version is older than, or the same as, the current

version

Yes

Screen control

I/O

61 LED OFF Sets all LED’s Off

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Service Manual

62 LED ON 1 Sets all LED’s as Colour 1 (Red)

If bicolour LED and Colour 2 ON, it will be Orange

63 LED ON 2 Sets all LED’s as Colour 2 (Green)

If bicolour LED and Colour 1 ON, it will be Orange

Tuner

1 Show tuner status Shows the tuner status display on the OSD

2 Clear tune info Erase the tune database

Sets all channels to an un-tuned state

Yes

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