Chassis L6 - Service default-alignment mode (SDAM) - Activation and menu

Oct 12, 2026

Service information for Chassis L6 explains how functional blocks are identified via test points for power, line drive/output, frame drive/output, synchronisation circuitry, video processing, audio processing, control circuitry, and teletext processing, including the diagnostic sequence rule. It details the service default-alignment mode (SDAM) for faultfinding, how to activate or leave it using service pins or the DST, and the menu items shown on screen such as software version, operation hours, service mode indicator, option code, and error code history stored in EEPROM. It also summarizes OSD error handling and LED blink behaviour.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Functional blocks

Test points and diagnostic sequence

Service default-alignment mode (SDAM)

Activation methods

Leaving SDAM and functions

Service default-alignment menu

Error messages

OSD and LED behaviour table

6. Repair facilities # 1. Functional blocks On both the service printing on the copper and thecomponent side,functional blocks are indicated by linesand text. The L6 chassis is equipped with test points in the serviceprinting on both sides of mono-board.These test pointsare referring to the functional blocks as mentioned above: Test points for the power supply * P1-P2-P3,etc: Test points for the line drive and * L1-L2-L3,etc: line output circuitry *F1-F2-F3,etc: Test points for the frame drive and frame output circuitry * S1-S2-S3,etc:Test points for the synchronisationcrcuitry Test points for the video * V1-V2-V3,etc: processing circuitry *A1-A2-A3,etc: Test points for the audio processing circuitry * C1-C2-C3,etc: Test points for the control circuitry Test points for the teletextprocessing circuitry The numbering is done in a for diagnostics logicalsequence;always start diagnosing within a functionalblock,in the sequence of the relevant test points,for thatfunctional block. # 3. Service default-alignment mode (SDAM) The service default-alignment mode is a pre-definedmode which can be used for faultfinding(especially whenthe TV gives no picture at all).Alloscillograms and DCvoltages in this service manual are measured in theservice default-alignment mode. Activate the service_default-alionment mode can be donein 2 ways: 1.By short-circuiting the service pins S1 and S2 of themicrocomputer (pin 14 of IC7600). 2.From normal operation mode by pressing the button"DEFAULT'or“ALIGN”on the DST(Dealer ServiceTool)RC7150. Leavino the service default-alianment mode to normaloperation can only be done by the stand-by on theremote control or by pressing diagnose 99 followed bythe OK-button on the DST (so not via mains switch “off”;after mains switch "off"and then “on”again the set willstart up in the service default-alignment mode again toenable easy faultfinding). Eunctions of the service default-alianment mode: 1.Allanalogue settings (volume,contrast,brightnessand saturation)are in the mid position. 2.Set is tuned to program number 1 3.Delta volume settings are not used (delta volumesetting=a delta on the volume setting) 4.OSD error message(present available error code)isdisplayed continuously 5.The OSD-key willact as search and auto store on themaximum program number. 6.Automatic switch off function (set switches "off"after15 minutes no IDENT)will be switched off 7.Hotel mode will be disabled 8.All other functions remain normal controllable 7 Chassis L6 Service default-alignment menu: New option settings are activated immediately. 1.Software version of the microprocessor used in thattypical set is displayed in the right top corner 2.A counter in the middle of the screen indicate thenormal operation hours of the set in a hexadecimalcode (every time the set is switched “on”the counteris incremented by 1 hour,so+1 at the counter). 3.The "S"in the middle of the screen next to thecounter indicate that the set is in the servicedefault-alignment mode 4.Option codeThis code indicates the Options setting of the set. 5.Error code history: The 5 last different error codes occurred are stored inthe EEPROM memory;last error code detected willbe displayed on the left side (see for an overview ofall possible error codes Fig.6.3),so e.g.: 00000means no error codes present inthe buffer 30000 means one error code present in the buffer;error code 3 23000 means two error codes present in the buffer;last detected error code is error code 2,previous detected error code is error code 3 The error code history buffer is cleared when theService Menu is left by the stand-by command or bydiagnose 99 command.In case the Service Menu isleft by the mains switch “off”the error code historybuffer will not be cleared. PCS 81683 GB The microcomputer also detects errors in circuitsconnected to the I²C (Inter IC)bus.These errormessages are communica

FAQs

What functional blocks are covered by the service test points in Chassis L6?

The document lists test points for power supply, line drive and line output circuitry, frame drive and frame output circuitry, synchronisation circuitry, video processing circuitry, audio processing circuitry, control circuitry, and teletext processing circuitry.

How can the service default-alignment mode (SDAM) be activated and exited?

SDAM can be activated by short-circuiting service pins S1 and S2 of the microcomputer, or from normal operation using the DST button "DEFAULT" or "ALIGN". SDAM can be left via the standby command on the remote control or by diagnose 99 followed by OK on the DST.

How does the service default-alignment mode display errors and track error history?

Errors are communicated via OSD messages and a flashing LED in SDAM. The last five different error codes are stored in EEPROM; the newest detected code appears on the left, and the history buffer is cleared when leaving the service menu by standby or diagnose 99.

Oct 12, 2026

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