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A-PDF MERGER DEMO Alignments
Note: The Service Default Mode (SDM) and Service Alignment Mode (SAM) are described in chapter 5. Menu navigation is done with the 'CURSOR UP, DOWN, LEFT or RIGHT' keys of the remote control transmitter.
General Alignment Conditions
Perform all electrical adjustments under the following conditions: A C voltage and frequency: 110 V ( 0 %), 60 Hz ( %). 1 5 C onnect the set to the AC power via an isolation transformer. A llow the set to warm up for approximately 20 minutes. M easure the voltages and waveforms in relation to chassis ground (with the exception of the voltages on the primary side of the power supply). Never use the cooling fins / plates as ground.
est probe: Ri > 10 M; Ci < 2.5 pF. T se an isolated trimmer / screwdriver to perform the alignments. U
Hardware Alignments
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Fig. 1
Vg2 Adjustment
1. 2. 3. 4. Activate the SAM. Go to the WHITE TONE sub menu. Set the values of NORMAL RED, GREEN and BLUE to 40. Go, via the MENU key, to the normal user menu and set - CONTRAST to zero. - BRIGHTNESS to minimum (OSD just visible in a dark room). Return to the SAM via the MENU key. Connect the RF output of a pattern generator to the antenna input. Test pattern is a 'black' picture (blank screen on CRT without any OSD info). Set the channel of the oscilloscope to 50 V/div and the time base to 0.2 ms (external triggering on the vertical pulse). Ground the scope at the CRT panel and connect a 10:1 probe to one of the cathodes of the picture tube socket (see diagram B).
5. 6. 7. 8.
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9. Measure the cut off pulse during first full line after the frame blanking (see Fig. 2). You will see two pulses, one being the cut off pulse and the other being the white drive pulse. Choose the one with the lowest value, this is the cut off pulse. 10. Select the cathode with the highest VDC value for the alignment. Adjust the Vcutoff of this gun with the SCREEN potentiometer (see Fig. 1) on the LOT to the correct value (see table below). 11. Restore BRIGHTNESS and CONTRAST to normal (= 31).
Fig. 2
Focusing
1. Tune the set to a circle or crosshatch test pattern (use an external video pattern generator). 2. Choose picture mode NATURAL (or MOVIES) with the 'SMART PICTURE' button on the remote control transmitter. 3. Adjust the FOCUS potentiometer (see Fig. 1) until the vertical lines at 2/3 from east and west, at the height of the centerline, are of minimum width without visible haze.
Software Alignments And Settings
Enter the Service Alignment Mode (see Service Modes, Error Codes and Faultfinding). The SAM menu will now appear on the screen. Select one of the following alignments:
Options
Display Option Byte Chart
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Options are used to control the presence / absence of certain features and hardware.
How to change an Option Byte
An Option Byte represents a number of different options. Changing these bytes directly makes it possible to set all options very fast. All options are controlled via seven option bytes. Select the option byte (OB1.. OB7) with the MENU UP/DOWN keys, and enter the new value. Leaving the OPTION submenu saves changes in the Option Byte settings. Some changes will only take effect after the set has been switched OFF and ON with the AC power switch (cold start).
How to calculate the value of an Option Byte
Calculate an Option Byte value (OB1 .. OB7) in the following way: 1. Check the status of the single option bits (OP): are they enabled (1) or disabled (0). 2. When an option bit is enabled (1) it represents a certain value (see column 'Dec. value' in table below). When an option bit is disabled, its value is 0. 3. The total value of an Option Byte is formed by the sum of its eight option bits.
Option Bit Assignment
Following are the option bit assignments for all L01 software clusters. ption Byte 1 (OB1) O P10: CHINA O P11: VIRGIN_MODE O P12: UK_PNP O P13: ACI O
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P14: ATS O P15: LNA O P16: FM_RADIO O P17: PHILIPS_TUNER O O ption Byte 2 (OB2) P20: HUE O P21: COLOR_TEMP O P22: CONTRAST_PLUS O P23: TILT O P24: NOISE_REDUCTION O P25: CHANNEL_NAMING O P26: SMART_PICTURE O P27: SMART_SOUND O O ption Byte 3 (OB3) P30: AVL O P31: WSSB O P32: WIDE_SCREEN O P33: SHIFT_HEADER_SUBTITLE O P34: CONTINUOUS_ZOOM O P35: COMPRESS_16_9 O P36: EXPAND_4_3 O P37: EW_FUNCTION O O ption Byte 4 (OB4) P40: STEREO_NON_DBX O P41: STEREO_DBX O P42: STEREO_PB O P43: STEREO_NICAM_2CS O P44: DELTA_VOLUME O P45: ULTRA_BASS O P46: VOLUME_LIMITER O P47: INCR_SUR O O ption Byte 5 (OB5) P50: PIP O P51: HOTEL_MODE O P52: SVHS O P53: CVI O P54: AV3 O P55: AV2 O P56: AV1 O P57: NTSC_PLAYBACK O O ption Byte 6 (OB6) P60: Reserved (value = 0) O P61: SMART_TEXT O P62: SMART_LOCK O P63: VCHIP O P64: WAKEUP_CLOCK O P65: SMART_CLOCK O P66: SMART_SURF O P67: PERSONAL_ZAPPING O
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ption Byte 7 (OB7) O P70: SOUND_SYSTEM_AP_3 /MULTI_STANDARD_EUR / SYSTEM_LT_2 O P71: SOUND_SYSTEM_AP_2 / WEST_EU/ SYSTEM_LT_1 O P72: SOUND_SYSTEM_AP_1 O P73: COLOR_SYSTEM_AP O P74: Reserved (value = 0) O P75: Reserved (value = 0) O P76: TIME_WIN2 O P77: TIME_WIN1 O
Option bit definition
P10: CHINA O 0 : Tuning is not for China set, or this option bit is not applicable, 1 : Tuning is for China set, Default setting : 0. P11: VIRGIN_MODE 0 : O Virgin mode is disabled or not applicable, 1 : Virgin mode is enabled. Plug and Play menu item will be displayed to perform installation at the initial startup of the TV when VIRGIN_MODE is set to 1. After installation is finished, this option bit will be automatically set to 0, Default setting : 0. P12: UK_PNP O 0 : UK's default Plug and Play setting is not available or not applicable, 1 : UK's default Plug and Play setting is available. When UK_PNP and VIRGIN_MODE are set to 1 at the initial setup, LANGUAGE = ENGLISH, COUNTRY = GREAT BRITAIN and after exiting from menu, VIRGIN_MODE will be set automatically to 0 while UK_PNP remains 1, Default setting : 0. P13: ACI O 0 : ACI feature is disabled or not applicable, 1 : ACI feature is enabled, Default setting : 0. P14: ATS O 0 : ATS feature is disabled or not applicable, 1 : ATS feature is enabled. When ATS is enabled, it sorts the program in an ascending order starting from program 1, Default setting : 0. P15: LNA O 0 :Auto Picture Booster is not available or not applicable, 1: Auto Picture Booster is available, Default setting : 0. P16: FM_RADIO O 0 : FM radio feature is disabled or not applicable, 1 : FM radio feature is enabled, Default setting : 0. P17: PHILIPS_TUNER O 0 : ALPS / MASCO compatible tuner is in use, 1 : Philips compatible tuner is in use, Default setting : 0. P20: HUE O 0 : Hue/Tint Level is disabled or not applicable,
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1 : Hue/Tint Level is enabled, Default setting : 0. P21: COLOR_TEMP O 0 : Color Temperature is disabled or not applicable, 1 : Color Temperature is enabled, Default setting : 0. P22: CONTRAST_PLUS O 0 : Contrast+ is disabled or not applicable, 1 : Contrast+ is enabled, Default setting : 0. P23: TILT O 0 : Rotate Picture is disabled or not applicable, 1 : Rotate Picture is enabled, Default setting : 0. P24: NOISE_REDUCTION O 0 : Noise Reduction (NR) is disabled or not applicable, 1 : Noise Reduction (NR) is enabled, Default setting : 0. P25: CHANNEL_NAMING O 0 : Name FM Channel is disabled or not applicable, 1 : Name FM Channel is enabled, Default setting : 0. Note : Name FM channel can be enabled only when FM_RADIO = 1. P26: SMART_PICTURE O 0 : Smart Picture is disabled or not applicable, 1 : Smart Picture is enabled, Default setting : 1 P27: SMART_SOUND O 0 : Smart Sound is disabled or not applicable, 1 : Smart Sound is enabled, Default setting : 1 P30: AVL A 0 : AVL is disabled or not applicable, 1 : AVL is enabled, Default setting : 0. P31: WSSB O 0 : WSSB is disabled or not applicable, 1 : WSSB is enabled, Default setting : 0. Note : This option bit can be set to 1 only when WIDE_SCREEN = 1. P32: WIDE_SCREEN O 0 : Software is used for 4:3 set or not applicable, 1 : Software is used for 16:9 set, Default setting : 0. P33: SHIFT_HEADER_SUBTITLE O 0 : Shift Header / Subtitle is disabled or not applicable, 1 : Shift Header / Subtitle is enabled, Default setting : 0. Note : This option bit can be set to 1 only when WIDE_SCREEN = 1.
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P34: CONTINUOUS_ZOOM O 0 : Continuous Zoom is disabled or not applicable, 1 : Continuous Zoom is enabled, Default setting : 0. Note : This option bit can be set to 1 only when WIDE_SCREEN = 1. P35: COMPRESS_16_9 O 0 : COMPRESS 16:9 selection is not applicable. Item should not be in the FORMAT menu list, 1 : COMPRESS 16:9 selection is applicable. Item should not be in the FORMAT menu list, Default setting : 0. P36: EXPAND_4_3 O 0 : Expand 4:3 selection is not applicable. Item should not be in the FORMAT menu list, 1 : Expand 4:3 selection is applicable. Item should be in the FORMAT menu list, Default setting : 0. P37: EW_FUNCTION O 0 : EW function is disabled. In this case, only Expand 4:3 is allowed, Compress 16:9 is not applicable. 1 : EW function is enabled. In this case, both Expand 4:3 and Compress 16:9 are applicable. Default setting : 0. P40: STEREO_NON_DBX O 0 : For AP_NTSC, chip TDA 9853 is not present, 1 : For AP_NTSC, chip TDA 9853 is present, Default setting : 0. P41: STEREO_DBX O 0 : For AP_NTSC, chip MSP 3445 is not present, 1 : For AP_NTSC, chip MSP 3445 is present, Default setting : 0. P42: STEREO_PB O 0 : For AP_PAL, chip MSP3465 is not present, 1 : For AP_PAL, chip MSP3465 is present, Default setting : 0. P43: STEREO_NICAM_2CS O 0 : For EU and AP_PAL, chip MSP 3415 is not present, 1 : For EU and AP_PAL, chip MSP 3415 is present, Default setting : 0. P44: DELTA_VOLUME O 0 : Delta Volume Level is disabled or not applicable, 1 : Delta Volume Level is enabled, Default setting : 0. P45: ULTRA_BASS O 0 : Ultra Bass is disabled or not applicable, 1 : Ultra Bass is enabled, Default setting : 0. P46: VOLUME_LIMITER O 0 : Volume Limiter Level is disabled or not applicable, 1 : Volume Limiter Level is enabled, Default setting : 0. P47: INCR_SUR O 0 : Incredible Surround feature is disabled, 1 : Incredible Surround feature is enabled, Default setting : 1 P50: PIP O 0 : PIP is disabled or not applicable,
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1 : PIP is enabled, Default setting : 0. P51: HOTEL_MODE O 0 : Hotel mode is disabled or not applicable, 1 : Hotel mode is enabled, Default setting : 0. P52: SVHS O 0 : SVHS source is not available, 1 : SVHS source is available, Default setting : 0. Note : This option bit is not applicable for EU. P53: CVI O 0 : CVI source is not available, 1 : CVI source is available, Default setting : 0. P54: AV3 O 0 : Side/Front AV3 source is not present, 1 : Side/Front AV3 source is present, Default setting : 0. P55: AV2 O 0 : AV2 source is not present, 1 : AV2 source is present, Default setting : 0. Note : For EU, when AV2=1, both EXT2 and SVHS2 should be included in the OSD loop. P56: AV1 O 0 : AV1 source is not present, 1 : AV1 source is present, Default setting : 0. P57: NTSC_PLAYBACK O 0 : NTSC playback feature is not available, 1 : NTSC playback feature is available, Default setting : 0. P60: Reserved O Default setting : 0. P61: SMART_TEXT O 0 : Smart Text Mode and Favorite Page are disabled or not applicable, 1 : Smart Text Mode and Favorite Page are enabled, Default setting : 1. P62: SMART_LOCK O 0 : Child Lock and Lock Channel are disabled or not applicable for EU, 1 : Child Lock and Lock Channel are enabled for EU, Default setting : 1. P63: VCHIP O 0 : VCHIP feature is disabled, 1 : VCHIP feature is enabled, Default setting : 1. P64: WAKEUP_CLOCK O 0 : Wake up clock feature is disabled or not applicable, 1 : Wake up clock feature is enabled, Default setting : 1.
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P65: SMART_CLOCK O 0 : Smart Clock Using Teletext and Smart Clock Using PBS is disabled or not applicable, 1 : Smart Clock Using Teletext and Smart Clock Using PBS is enabled. For NAFTA, menu item AUTOCHRON is present in the INSTALL submenu, Default setting : 0. P66: SMART_SURF O 0 : Smart Surf feature is disabled or not applicable, 1 : Smart Surf feature is enabled, Default setting : 0. P67: PERSONAL_ZAPPING O 0 : Personal Zapping feature is disabled or not applicable, 1 : Personal Zapping feature is enabled, Default setting : 0. P70: MULTI_STANDARD_EUR O 0 : Not for Europe multi standard set, or this option bit is not applicable, 1 : For Europe multi standard set. Default setting : 0. Note : This option bit is used to control the SYSTEM selection in Manual Store : If MULTI_STANDARD_EUR = 1 then SYSTEM = Europe, West Europe, East Europe, UK, France otherwise SYSTEM = 'Europe, West Europe, UK for West Europe' (WEST_EU=1) or SYSTEM = 'Europe, West Europe, East Europe for East Europe' (WEST_EU=0) P71: WEST_EU O 0 : For East Europe set, or this option bit is not applicable, 1 : For West Europe set, Default setting : 0. P71 and 70: SYSTEM_LT_1, SYSTEM_LT_2 O These two option bits are allocated for LATAM system selection. 00 : NTSC-M 01 : NTSC-M, PAL-M 10 : NTSC-M, PAL-M, PAL-N 11 : NTSC-M, PAL-M, PAL-N, PAL-BG Default setting : 00 P70, 71 and 72: SOUND_SYSTEM_AP_1, SOUND_SYSTEM_AP_2, SOUND_SYSTEM_AP_3 O These three option bits are allocated for AP_PAL sound system selection. 000 : BG 001 : BG / DK 010 : I / DK 011 : BG / I / DK 100 : BG / I / DK / M Default setting : 00 P73: COLOR_SYSTEM_AP O This option bit is allocated for AP-PAL color system selection. 0 : Auto, PAL 4.43, NTSC 4.43, NTSC 3.58 1 : Auto, PAL 4.43, NTSC 4.43, NTSC 3.58, SECAM Default setting : 0 P74: Reserved O Default setting : 0. P75: Reserved O Default setting : 0.
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P77 and 76: TIME_WIN1, TIME_WIN2 O 00 :The time window is set to 1.2s 01 : The time window is set to 2s 10 : The time window is set to 5s 11 : not in use Default setting : 01 Note :The time-out for all digit entries depend on this setting.
Tuner
Note: Described alignments are only necessary when the NVM (item 7602) is replaced.
IF PLL
This adjustment is auto-aligned. Therefore, no action is required.
AFW (AFC window)
Fixed value is OFF.
AGC (AGC take over point)
Set the external pattern generator to a color bar video signal and connect the RF output to aerial input. Set amplitude to 10 mV and set frequency to 61.25 MHz (channel 3). Connect a DC multimeter to pin 1 of the tuner (item 1000 on the main panel). 1. Activate the SAM. 2. Go to the TUNER sub menu. 3. Select AFW with the UP/DOWN cursor keys and set to ON. 4. Select AGC with the UP/DOWN cursor keys. 5. Adjust the AGC-value (default value is 27) with the LEFT/RIGHT cursor keys until the voltage at pin 1 of the tuner lies between 3.8 and 2.3 V. 6. Select AFW with the UP/DOWN cursor keys and set to OFF. 7. Switch the set to STANDBY.
YD (Y-delay adjustment)
Always set to 3.
CL (Cathode drive level)
Always set to 4.
AFA
Read only bit, for monitoring purpose only.
AFB
Read only bit, for monitoring purpose only.
White Tone
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In the WHITE TONE sub menu, the values of the black cut off level can be adjusted. Normally, no alignment is needed for the WHITE TONE. You can use the given default values. The color temperature mode (NORMAL, COOL and WARM) and the color (R, G, and B) can be selected with the UP/DOWN RIGHT/LEFT cursor keys. The value can be changed with the LEFT/RIGHT cursor keys. First, select the values for the NORMAL color temperature. Then select the values for the COOL and WARM mode. After alignment, switch the set to standby, in order to store the alignments. Default settings: 1. NORMAL (color temperature = 10500 K): ORMAL R = 40 N ORMAL G = 40 N ORMAL B = 40 N 2. COOL (color temperature = 14000 K): ELTA COOL R = -2 D ELTA COOL G = 0 D ELTA COOL B = 6 D 3. WARM (color temperature = 8200 K): ELTA WARM R = 2 D ELTA WARM G = 0 D ELTA WARM B = -7 D
Geometry
The geometry alignments menu contains several items to align the set, in order to obtain a correct picture geometry. Connect an external video pattern generator to the aerial input of the TV-set and input a crosshatch test pattern. Set the generator amplitude to at least 1 mV and set frequency to 61.25 MHz (channel 3). 1. Set 'Smart Picture' to NATURAL (or MOVIES). 2. Activate the SAM menu (see Service Modes, Error Codes and Faultfinding). 3. Go to the GEOMETRY sub menu.
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4. Choose HORIZONTAL or VERTICAL alignment Now the following alignments can be performed:
Horizontal:
orizontal Parallelogram (HP) Align straight vertical lines in the top and the bottom; vertical rotation around H the center. orizontal Bow (HB) Align straight horizontal lines in the top and the bottom; horizontal rotation around the H center. H orizontal Shift (HSH) Align the horizontal center of the picture to the horizontal center of the CRT. E ast West Width (EWW) Align the picture width until the complete test pattern is visible. E ast West Parabola (EWP) Align straight vertical lines at the sides of the screen. U pper Corner Parabola (UCP) Align straight vertical lines in the upper corners of the screen. L ower Corner Parabola (LCP) Align straight vertical lines in the lower corners of the screen. E ast West Trapezium (EWT) Align straight vertical lines in the middle of the screen. H 60 Align straight horizontal lines if NTSC system is used (60 Hz) i.s.o. PAL (50 Hz).
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Vertical:
ertical slope (VSL) Align the vertical center of the picture to the vertical center of the CRT. This is the first of V the vertical alignments to perform. For an easy alignment, set SBL to ON. ertical Amplitude (VAM) Align the vertical amplitude so that the complete test pattern is visible. V ertical S-Correction (VSC) Align the vertical linearity, meaning that vertical intervals of a grid pattern must be V equal over the entire screen height. ertical Shift (VSH) Align the vertical centering so that the test pattern is located vertically in the middle. V Repeat the 'vertical amplitude' alignment if necessary. ertical Zoom (VX) The vertical zoom is added in for the purpose of development. It helps the designer to set a V proper values for the movie expand or movie(16x9) compress. Default value is 25. 60 Align straight vertical lines if NTSC system (60 Hz) is used i.s.o. PAL (50 Hz). V ervice blanking (SBL) Switch the blanking of the lower half of the screen ON or OFF (to be used in S combination with the vertical slope alignment). In the table below, you will find the GEOMETRY default values for the different sets.
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Audio
No alignments are needed for the audio sub menu. Use the given default values.
AT
Default value is 8.
CMT
Default value is 42.
QSS
OFF for mono sets, ON for stereo sets.
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FMI
OFF for mono sets, ON for stereo sets.
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Service Modes, Error Codes And Fault Finding
Test Points
The chassis is equipped with test points printed on the circuit board assemblies. These test points refer to the functional blocks:
The numbering is in a logical sequence for diagnostics. Always start diagnosing within a functional block in the sequence of the relevant test points for that block. Perform measurements under the following conditions: S ervice Default Mode (when this mode is not present, set all controls to 50% and volume select channel 3). S ervice Default Mode. V ideo: color bar signal. A udio: 3 kHz left, 1 kHz right.
Service Modes
Service Default Mode (SDM) and Service Alignment Mode (SAM) offer several features for the service technician, while the Customer Service Mode (CSM) is used for communication between dealer and customer. Note: Some L8 and M8 chassis sets use a software version that does not contain the Service Modes (see table). In this case, use the special Factory Mode Remote Control. This can be ordered by service code 4835 310 57511. Complete instructions are included. This remote control will place the TV in the Factory Mode and allow access to all adjustments that a normal Service Mode contains (including setting Option Bytes). Error codes will not be available. There is also the option of using ComPair, a hardware interface between a computer (see requirements) and the TV chassis. It offers the ability of structured trouble shooting, error code reading and software version readout for all L8 and M8 chassis. Requirements: To run ComPair on a computer (laptop or desktop) requires, as a minimum, a 486 processor, Windows 3.1 and a CD-ROM drive. A Pentium Processor and Windows 95/98 are also acceptable (see also ComPair
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Service Default Mode (SDM)
Purpose
o create a predefined setting to get the same measurement results as given in this manual. T o override SW protections. T o start the blinking LED procedure. T
Specifications
T uning frequency: 61.25 MHz (channel 3). C olor system: NTSC. A ll picture settings at 50 % (brightness, color contrast, hue). B ass, treble and balance at 50 %; volume at 25 %. A ll service-unfriendly modes (if present) are disabled, like: sleep) timer, ( hild/parental lock, c lue mute, b otel/hospitality mode h uto switch-off (when no 'IDENT' video signal is received for 15 minutes), a kip / blank of non-favorite presets / channels, s uto store of personal presets, a uto user menu time-out. a
How to enter SDM
se a standard customer RC-transmitter and key in the code 062596 directly followed by the MENU button, or U hort wires 9631 and 9641 on the mono carrier and switch the set ON apply AC power. Then press the power S button (remove short after start-up).
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Caution: Entering SDM by shorten wires 9631 and 9641 will override the +8V-protection. Do this only for a short period. When doing this, the service-technician must know exactly what he is doing, as it could lead to damaging the set. r via ComPair O After entering SDM, the following screen is visible, with SDM at the upper right side for recognition.
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How to navigate
hen you press the MENU button on the remote control, the set will switch between the SDM and the normal W user menu (with the SDM mode still active in the background). Return to the SDM screen with the OSD / STATUS button. hen you press the OSD / STATUS button on the remote control, the menu will show or hide the error buffer. W This feature is available to prevent interference during waveform measurements. n the TV press and hold the 'VOLUME down' and press the 'CHANNEL down' for a few from SDM to SAM and O reverse.
How to exit
Switch the set to STANDBY by pressing the power button on the remote control transmitter (if you switch the set OFF by removing the AC power, the set will return in SDM when AC power is re-applied). The error buffer is cleared.
Service Alignment Mode (SAM)
Purpose
o perform alignments. T o change option settings. T o display / clear the error code buffer. T
Specifications
O peration hours counter. S oftware version. O ption settings. E rror buffer reading and erasing. S oftware alignments.
How to enter
se a standard customer RC-transmitter and key in the code 062596 directly followed by the OSD / STATUS U
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button or ia ComPair. V The following screen is visible, with SAM at the upper right side for recognition.
1. LLLL This is the operation hours counter. It counts the normal operation hours, not the standby hours. 2. AAABCD-X.Y This is the software identification of the main micro controller = the project name (L01). A = the region: E = Europe, A = Asia Pacific, U = NAFTA, L = LATAM. B = the software diversity: N = stereo non-DBX, S = stereo DBX, M = mono, D = DVD. C = the language cluster number. D = UOC diversity. E = the main software version number. X = the sub software version number. Y 3. SAM Indication of the actual mode. 4. Errors buffer Five errors possible. 5. Option bytes Seven codes possible. 6. Clear Erase the contents of the error buffer. Select the CLEAR menu item and press the CURSOR RIGHT key. The content of the error buffer is cleared. 7. Options To set the Option Bytes. See chapter 8.3.1 for a detailed description. 8. AKB Disable (0) or enable (1) the 'black current loop' (AKB = Auto Kine Bias). 9. Tuner To align the Tuner. See chapter 8.3.2 for a detailed description. 10. White Tone To align the White Tone. See White tone for a detailed description. 11. Geometry To align the set geometry. See Geometry for a detailed description. 12. Audio No audio alignment is used for NTSC.
How to navigate
n SAM, select menu items with the CURSOR UP/DOWN key on the remote control transmitter. The selected I item will be highlighted. When not all menu items fit on the screen, move the CURSOR UP/DOWN key to display the next / previous menu items. ith the CURSOR LEFT/RIGHT keys, it is possible to: W De)activate the selected menu item. ( hange the value of the selected menu item. C ctivate the selected submenu. A hen you press the MENU button twice, the set will switch to the normal user menus (with the SAM mode still W
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active in the background). To return to the SAM menu press the OSD / STATUS button [ i+ ]. hen you press the MENU key in a submenu, you will return to the previous menu. W
How to exit
Switch the set to STANDBY by pressing the power button on the remote control transmitter (if you switch the set OFF by removing the AC power, the set will return in SAM when AC power is re-applied). The error buffer is not cleared.
Customer Service Mode (CSM)
Purpose
The Customer Service Mode is (de-)activated by the customer upon request of the service technician during a telephone conversation, in order to identify the status of the set. This CSM is a read only mode, therefore modifications in this mode are not possible.
How to enter
The CSM will be turned on after pressing the MUTE key on the remote control transmitter and any of the control buttons on the TV for at least 4 seconds simultaneously. This activation only works if there is no menu on the screen. After switching ON the Customer Service Mode, the following screen will appear:
1. Software identification of the main micro controller (see Service Alignment Mode (SAM)for an explanation). 2. Error code buffer (see Error Codes for more details). Displays the last seven errors of the error code buffer. 3. In this line, the Option Bytes (OB) are visible. Each Option Byte is displayed as a decimal number between 0 and 255. The set may not work correctly when an incorrect option code is set. See Options for more information on the option settings. 4. Indicates which color and sound system is installed for the selected pre-set. 5. Indicates if the set is not receiving an 'IDENT' signal on the selected source. It will display 'Not Tuned'. 6. Indicates if the sleep timer is enabled. 7. Indicates if the V-chip feature is enabled. 8. Value indicates parameter levels at CSM entry. CO = CONTRAST, CL = COLOR, BR = BRIGHTNESS, HU = HUE, SH = SHARPNESS 9. Value indicates parameter levels at CSM entry. VL = VOLUME LEVEL, BL = BALANCE LEVEL, AVL LIM = AUTO VOLUME LEVEL LIMITER
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10. Value indicates parameter levels at CSM entry. DV = DELTA VOLUME, BS = BASS LEVEL, TR = TREBLE LEVEL
How to exit
You can turn the Customer Service Mode off: fter you press 'any' key of the remote control transmitter with exception of the CHANNEL and VOLUME keys. A fter you switch-off the TV set with the AC power switch. A
Problems And Solving Tips (Related To CSM)
Picture Problems
No colors / noise in picture Check CSM line 4. Wrong color system installed. To change the setting: 1. Select the MANUAL STORE sub menu. 2. Select and change the SYSTEM setting until picture and sound are correct. 3. Select the STORE menu item. Colors not correct / unstable picture Check CSM line 4. Wrong color system installed. To change the setting: 1. Press the MENU button on the remote control. 2. Select the INSTALL sub menu. 3. Select the MANUAL STORE sub menu. 4. Select and change the SYSTEM setting until picture and sound are correct. 5. Select the STORE menu item. TV switches off or changes channel without any user action The TV set switches off after TV SWITCHING OFF was displayed. Auto standby switched the set off because: here was no 'ident' signal for more than 15 minutes or T here was no remote control signal received or local key pressed for > 2 hours. T See Alignments for a description of the options to enable / disable auto standby Picture too dark or too bright Increase / decrease the BRIGHTNESS and / or the CONTRAST value when: he picture improves after you have pressed the 'Smart Picture' button on the remote control. T he picture improves after you have switched on the Customer Service Mode T The new 'Personal' preference value is automatically stored. White line around picture elements and text Decrease the SHARPNESS value when: he picture improves after you have pressed the 'Smart Picture' button on the remote control. T he picture improves after you have switched on the Customer Service Mode T The new 'Personal' preference value is automatically stored. Snowy picture Check CSM line 5. If this line indicates 'Not Tuned', check the following:
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o or bad antenna signal. Connect a proper antenna signal. N ntenna not connected. Connect the antenna. A o channel / preset is stored at this program number. Go to the INSTALL menu and store a proper channel at N this program number. he tuner is faulty (in this case the CODES line will contain error number 10). Check the tuner and replace / T repair if necessary. Snowy picture and/or unstable picture scrambled or decoded signal is received. A Black and white picture Increase the COLOR value when: he picture improves after you have pressed the 'Smart Picture' button on the remote control. T he picture improves after you have switched on the Customer Service Mode T The new 'Personal' preference value is automatically stored. Menu text not sharp enough Decrease the CONTRAST value when: he picture improves after you have pressed the 'Smart Picture' button on the remote control. T he picture improves after you have switched on the Customer Service Mode T The new 'Personal' preference value is automatically stored.
Sound Problems
No sound or sound too loud (after channel change / switching on) Increase / decrease the VOLUME level when the volume is OK after you switched on the CSM. The new 'Personal' preference value is automatically stored.
ComPair
Introduction
ComPair (Computer Aided Repair) is a service tool for Philips Consumer Electronics products. ComPair is a further development on the European DST (service remote control), which allows faster and more accurate diagnostics. Compare has three big advantages: omPair helps you to quickly get an understanding on how to repair the chassis in a short time by guiding you C systematically through the repair procedures. omPair allows very detailed diagnostics (on I2C level) and is therefore capable of accurately indicating problem C areas. You do not have to know anything about I 2 C commands yourself because ComPair takes care of this. omPair speeds up the repair time since it can automatically communicate with the chassis (when the C microprocessor is working) and all repair information is directly available. When ComPair is installed together with the SearchMan electronic manual of the defective chassis, schematics and PWBs are only a mouse click away.
Specifications
ComPair consists of a Windows based faultfinding program and an interface box between PC and the (defective)
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product. The ComPair interface box is connected to the PC via a serial or RS232 cable. In case of the L8/M8 chassis, the ComPair interface box and the TV communicate via a bi-directional service cable via the service connector (located on the Main panel, see Hardware alignments suffix D). The ComPair faultfinding program is able to determine the problem of the defective television. ComPair can gather diagnostic information in two ways: 1. Automatic (by communication with the television) ComPair can automatically read out the contents of the entire error buffer. Diagnosis is done on I 2 C level. ComPair can access the I 2 C bus of the television. ComPair can send and receive I 2 C commands to the micro controller of the television. In this way, it is possible for ComPair to communicate (read and write) to devices on the I 2 C busses of the TV-set. 2. Manually (by asking questions to you) Automatic diagnosis is only possible if the micro controller of the television is working correctly and only to a certain extend. When this is not the case, ComPair will guide you through the faultfinding tree by asking you questions (e.g. Does the screen gives a picture? Click on the correct answer: YES / NO) and showing you examples (e.g. Measure test-point I7 and click on the correct oscillogram you see on the oscilloscope). You can answer by clicking on a link (e.g. text or a waveform picture) that will bring you to the next step in the faultfinding process. By a combination of automatic diagnostics and an interactive question / answer procedure, ComPair will enable you to find most problems in a fast and effective way. Beside fault finding, ComPair provides some additional features like: U p- or downloading of presets. M anaging of preset lists. E mulation of the (European) Dealer Service Tool (DST). I f both ComPair and SearchMan (Electronic Service Manual) are installed, all the schematics and the PWBs of the set are available by clicking on the appropriate hyperlink.
Example: Measure the DC-voltage on capacitor C2568 (Schematic/Panel) at the Monocarrier. Click on the 'Panel' hyperlink to automatically show the PWB with a highlighted capacitor C2568. Click on the 'Schematic' hyperlink to automatically show the position of the highlighted capacitor.
How To Connect
1. First install the ComPair Browser software (see the Quick Reference Card for installation instructions). 2. Connect the RS232 interface cable between a free serial (COM) port of your PC and the PC connector (marked with 'PC') of the ComPair interface. 3. Connect the AC power adapter to the supply connector (marked with 'POWER 9V DC') on the compare interface. 4. Switch the ComPair interface OFF. 5. Switch the television set OFF, remove the AC power. 6. Connect the ComPair interface cable between the connector on the rear side of the ComPair interface (marked with 'I 2 C') and the ComPair connector on the mono carrier (see Hardware alignments suffix D). 7. Plug the AC power adapter in the AC power outlet and switch on the interface. The green and red LEDs light up together. The red LED extinguishes after approx. 1 second while the green LED remains lit. 8. Start the ComPair program and read the introduction chapter.
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How To Order
ComPair order codes: S tarter kit ComPair + SearchMan software + compare interface (excluding transformer): 4822 727 21629 C omPair interface (excluding transformer): 4822 727 21631 S tarter kit ComPair software (registration version): 4822 727 21634 S tarter kit SearchMan software: 4822 727 21635 C omPair CD (update): 4822 727 21637 S earchMan CD (update): 4822 727 21638 C omPair interface cable: 3122 785 90004
Error Codes
Introduction
The error code buffer contains all errors detected since the last time the buffer was erased. The buffer is written from left to right. When an error occurs that is not yet in the error code buffer, it is written at the left side and all other errors shift one position to the right. The error code buffer is cleared in the following cases: y activation of the CLEAR command in the SAM menu: B hen you exit SDM / SAM with the STANDBY command on the remote control (when leaving SDM / SAM, by W disconnecting the set from AC power, the error buffer is not reset). hen you transmit the command DIAGNOSE-99-OK with ComPair. W f the content of the error buffer has not changed for 50 hours, it resets automatically. I Examples: ERROR: 0 0 0 0 0: No errors detected. ERROR: 6 0 0 0 0: Error code 6 is the most recent and only detected error. ERROR: 9 6 0 0 0: Error code 6 was first detected and error code 9 is the most recent detected error. You can also make the contents of the error buffer visible via the blinking LED procedure (see The Blinking LED Procedure). This is especially useful when there is no picture.
Error Codes
In case of non-intermittent faults, clear the error buffer before you begin the repair. These to ensure that old error codes are no longer present. If possible, check the entire contents of the error buffer. In some situations an error code is only the result of another error code and not the actual cause (e.g., a fault in the protection detection circuitry can also lead to a
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protection).
The Blinking LED Procedure
Via this procedure you can make the contents of the error buffer visible via the front LED. This is especially useful when there is no picture. When the SDM is entered, the LED will blink the contents of the error-buffer. Error-codes 0 are shown as follows: 1 long blink of 750 ms (which is an indication of the decimal digit), a pause of 1.5 s, a short blinks (n = 1 - 9), n hen all the error-codes are displayed, the sequence finishes with a LED blink of 3 s, w he sequence starts again. t Example of error buffer: 12 9 6 0 0 After entering SDM: 1 long blink of 750 ms followed by a pause of 1.5 s, 2 short blinks followed by a pause of 3 s, 9 short blinks followed by a pause of 3 s, 6 short blinks followed by a pause of 3 s, 1 long blink of 3 s to finish the sequence, t he sequence starts again.
Protections
If a fault situation is detected an error code will be generated and if necessary the set will be put in the protection
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mode. Blinking of the red LED at a frequency of 3 Hz indicates the protection mode. In some error cases the microprocessor does not put the set in the protection mode. The error codes of the error buffer can be read via the service menu (SAM), the blinking LED procedure or via ComPair. The DST diagnose functionality will force the set into the Service-standby, which is similar to the usual standby mode, however the microprocessor has to remain in normal operation completely. To get a quick diagnosis the chassis has three service modes implemented: he Customer Service Mode (CSM). T he Service Default Mode (SDM). Start-up of the set in a predefined way. T he Service Alignment Mode (SAM). Adjustment of the set via a menu and with the help of test patterns. T See for a detailed description Circuit description
Repair Tips
Below some failure symptoms are given, followed by a repair tip. et is dead and makes hiccuping sound S 'MainSupply' is available. Hiccupping stops when de-soldering L5561, meaning that problem is in the 'MainSupply' line. No output voltages at LOT, no horizontal deflection. Reason: line transistor 7460 is defective. et is dead, and makes no sound S Check power supply IC 7520. Result: voltage at pins 1, 3, 4, 5 and 6 are about 180 V and pin 8 is 0 V. The reason why the voltage on these pins is so high is because the output driver (pin 6) has an open load. That is why MOSFET 7521 is not able to switch. Reason: feedback resistor 3523 is defective. Caution: be careful measuring on the gate of 7521; circuitry is very high ohmic and can easily be damaged! et is in hiccup mode and shuts down after 8 s. S Blinking LED (set in SDM mode) indicates error 5. As it is unlikely that ?P 'POR' and '+8V protection' happen at the same time, measure the '+8V'. If this voltage is missing, check transistor 7480. et is non-stop in hiccup mode S Set is in over current mode; check the secondary sensing (opto coupler 7515) and the 'MainSupply' voltage. Signal 'Stdby_con' must be logic low under normal operation conditions and goes to high (3.3 V) under standby and fault conditions. et turns on, but without picture and sound S The screen shows snow, but OSD and other menus are okay. Blinking LED procedure indicates error 11, so problem is expected in the tuner (pos. 1000). Check presence of supply voltages. As 'Vlotaux+5V' at pin 5 and 7 are okay, 'VT_supply' at pin 9 is missing. Conclusion: resistor 3460 is defective. et turns on, but with a half screen at the bottom. S Sound is okay Blinking LED (set in SDM mode) indicates error 3. Check 'Vlotaux+11V' and '+50V'. If they are okay, problem is expected in the vertical amplifier IC 7471. Measure with a scope the waveform on pin 17 of the UOC. Measure also at pin 1 of IC 7471. If here the signal is missing, a defective resistor R3244 causes the problem.
TROUBLESHOOTING FLOW CHARTS
DEAD SET PAGE 1 DEAD SET PAGE 2
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DEAD SET PAGE 3 SHUTDOWN POWER SUPPLY CHECK PAGE 1 POWER SUPPLY CHECK PAGE 2 NO AUDIO PAGE 1 NO AUDIO PAGE 2
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