Sony VTXD-800 Service manual

SERVICE MANUALSERVICE MANUAL

SERVICE MANUAL

SERVICE MANUALSERVICE MANUAL

Magellan IIMagellan II

Magellan II

Magellan IIMagellan II

CHASSISCHASSIS

CHASSIS

CHASSISCHASSIS

MODEL

VTX-D800UVTX-D800U

VTX-D800U

VTX-D800UVTX-D800U VTX-D800NVTX-D800N

VTX-D800N

VTX-D800NVTX-D800N VTX-D800EVTX-D800E

VTX-D800E

VTX-D800EVTX-D800E

COMMANDER DEST

RM-X800 UK

RM-X800 FINLAND/SWEDEN

RM-X800 ESP

DIGITAL RECEIVER

Service Manual

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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

6 Technical 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

Service Manual

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Safety Warning

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

FOR THIS REASON, THE RECEIVER MUST ALWAYS BE DISCONNECTED FROM THE MAINS SUPPLY

BEFORE ANY WORK DETAILED IN THIS MANUAL IS CARRIED OUT.

Caution High Voltage

Fig. 1

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

Philips Screwdriver

Service Manual

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1 Dissassembly

1.1 Cover Removal

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.

==>

Lift cover gently at this point.

==>

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.

Service Manual

Clip located on both sides of Front panel

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[ 1.3 ] B Board Removal

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.

Screw

CN600

==>

Screws

==>

Screw

[ 1.4 ] Chassis Removal

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

Stops

Service Manual

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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.

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

Sequence number Key

1 DIGIT 1 2 DIGIT 9 3 LEFT CURSOR 4 BLUE

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.

Service Manual

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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 1 ⇒ 4 ⇒ Timeout after 3 seconds 1 ⇒ 0 0 ⇒ Timeout after 3 seconds 0 ⇒ 0 ⇒ 0

Executes command 14 Executes command 14 Does not execute any command (cancels input) Cancels TT mode Cancels TT mode

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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.

2 3 4 5 6 Factory reset &

reboot 7 Factory reset Reset all settings to defaults (shipping) Yes 8 Shipping default

& reboot

9 Shipping default Set the box to shipping condition

SCART/AV

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

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.

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 17 18 19

21 22 23 24 25 26 27 28 29

Common interface

Reset all settings to defaults (shipping) Reboot

Set the box to shipping condition

Tune database is cleared Reboot - Start-up menu will be activated

Tune database is cleared

When colour bar is enabled the OSD cannot be seen.

Appendix A shows the sequence sent.

Yes

Service Manual

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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.

35 36 37 38 39

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

45 46 47 48 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

51 52 53 54 55 56 57 58 59

I/O

61 LED OFF Sets all LED’s Off

Service Manual

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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

64 65 66 67 68 69

Tuner

71 Show tuner status Shows the tuner status display on the OSD 72 Clear tune info Erase the tune database

Sets all channels to an un-tuned state

Yes

73 74 75 76 77 78 79

81 82 83 84 85 86 87 88 89

91 92 93 94 95 96 97 98 99

Service Manual

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5.0: Power supply

The power supply in an integrated part of the Main PWB, and contains the following functional blocks: -

The main components are:-

1. Mains Plug, Lead and input filter

2. Primary and PWM Controller

3. Transformer and outputs

4. Feedback Circuit

5. Post Regulation Circuits.

Input Filter

Primary &

Transformer

32.5V Output

Controller

+5V

udio

Feedback Circuit

21V Output

5V Output

3.3V Output

+12V

2V5

1V5

The output of this power supply can be measured at the following positions on the PWB, and should be within the tolerances for each of the supply rails (marked on the PWB):-

Label / Rail JL Position Vnom Vmin Vmax

33v J1 33 30 35

12v G3 12 11.4 12.6 5v J2 5 4.75 5.25 3v3 J3 3.3 3.14 3.46 2v5 F4 2.5 2.3 2.7 1v5 D3 1.5 1.43 1.57

Service Manual

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5.1: Power Supply Detailed Description

The most common failures will be fixed by replacing the following components. PRIMARY BLAST KIT:- F600, D600, D602 D601, IC600, PH600, IC602, D604.

The components detailed below have the following functions:

Fuse, F600. T1.25A 250V

Always replace the fuse, with the same type and ratings as the one removed. The fuse will fail if the following occurs:

1. A Primary component fails

2. The input circuit was over stressed

3. or both.

When the fuse fails check the following components: VDR600, C600, L602, D600, D602 D601, IC600.

If all the components look and measure OK, then replace the fuse and apply power, most probable cause is that the VDR clamped a mains surge and caused the fuse to fail.

If any of the components have failed, then replace as necessary.

VDR600, 620V Metal Oxide Varistor

If this component has failed then the unit has seen a massive mains voltage surge, probably from Lightening or similar phenomenon. Replace the following components:-

F600 VDR600 C600 L602

If the primary circuit has been damaged in any other way, replace the components as necessary.

If the unit is exposed to a massive mains surge then the feedback components may have been damaged. Also Check PH600, IC602, D604.

D600 Bridge Rectifier

It is common for bridge rectifier to fail under repetitive mains surge conditions. Check the value of the TH601, if it is lower than 10 Ohms replace it. TH601 is there to protect the bridge rectifier.

Before you apply power after changing D600 check the other primary parts, if D600 failed F600 should be open and often the primary blast kit will need to be changed.

IC600 Primary Controller

This IC houses the primary MOSFET and the PWM controller. Check the DRAIN SOURCE characteristic to see if it’s failed. Often when IC600 fails there are signs of damage to the package. In most cases this will fail short. In some rare cases the part will fail open. If IC600 fails the primary blast kit needs to be replaced.

D601 Flyback Diode

This diode catches the transformers flyback voltage, and pushes the energy into the snubber circuit. This circuit will often fail as a result of IC600 failing. If damaged primary replace the blast kit.

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