IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all Philips Consumer Electronics Company** Equipment. The service procedures recommended by Philips and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose.
Page 3
FIRE AND SHOCK HAZARD 1. Be sure all components are positioned in such a way as to avoid the possibility of adjacent component shorts. This is especially important on those chassis which are transported to and from the service shop. 2.
LEAKAGE CURRENT COLD CHECK 1. Unplug the ac line cord and connect a jumper between the two prongs of the plug. 2. Turn on the power switch. 3. Measure the resistance value between the jumpered ac plug and all exposed cabinet parts of the receiver, such as screw heads, antennas, and control shafts.
Page 6
TV SAFETY NOTES SAFETY CHECKS After the original service problem has been corrected, a complete safety check should be made. Be sure to check over the entire set, not just the areas where you have worked. Some previous servicer may have left an unsafe condition, which could be unknowingly passed on to your customer.
Page 7
The use of a substitute part which does not have the same safety characteristics as the Philips recommended replacement part shown in this service manual may create shock, fire, or other hazards.
Page 8
PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) Some semiconductor solid state devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices, Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by electrostatic discharge (ESD).
Page 9
PRACTICAL SERVICE PRECAUTIONS IT MAKES SENSE TO AVOID EXPOSURE TO ELECTRICAL SHOCK. While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard. ALWAYS RESPECT VOLTAGES. While some may not be dangerous in themselves, they can cause unexpected reactions –...
Video games and the stationary black bars which outline standard 4:3 programming on a widescreen TV compound this problem. Now, Philips has found a way to combat this problem through APAC technology. Periodically, APAC automatically shifts...
Page 11
Protective screen filter This filter has been specifically formulated by Philips for HD displays to give the best possible picture and still protect your investment. The protective screen filter helps prevent accidental damage to the delicate front Lenticular screen.
Page 12
Supporting features • Digital Color Transient Improvement (CTI) • Digital Histogram • Picture Freeze • Auto Aspect Ratio Adaptation • Incredible Surround™ • Automatic Volume Leveler (AVL) • Independent headphone volume control • EasyTune™ (Auto Search, Auto Tune, Auto Install) •...
Page 13
DISASSEMBLY PROCEDURES Disassembly Procedures (46, 50, 55, & 60 Inch Models) All numbers found in the following text refer to the CABINET DISASSEMBLY EXPLODED VIEW drawing and apply to 46”, 50”, 55”, and 60” models. NOTE: If you are servicing a PCB or speaker, you do not have to remove the plastic upper Back cover. Upper Back Cover (AC02) 1.
Service Position (Note: Unplug the AC Line Cord) This Service Position exposes the entire bottom side of the Power Supply Panel, Large Signal Panel (LSB), & the Small Signal Panel (SSM). A major portion troubleshooting can be accomplished after completing this procedure.
Page 15
2. Loosen the Chassis Frame. Remove 5 screws “D” that fasten the Chassis Frame to the Cabinet Bottom. Service Pos. Detail - A. 3. Remove Light Barrier (AC07) Service Detail - B...
Page 16
4. Remove 2 screws “E” from the Left Side - Light Barrier Guide and remove this Guide. 5. Grasp the corners of the Chassis Frame and slide in towards you about a inch. This is required in order that 3 metal cleats (AC36) holding the front edge of the Chassis Frame are released.
Page 17
8. Now, lift the back edge of the Chassis Frame (nearest you), up while also lifting (slightly), the front edge to slide forward in to the Service Position shown. Service Position Detail - E Mirror Mounting Board (AC18) 1. Remove 6 screws located in the mirror mounting board brackets and remove the board. Note: Care should be taken NOT to place fingerprints or smudges on the mirror.
Page 18
Rear Jack Panel Cover (AC08 & AC27) 1. Complete steps 1 through 7 of the Service Position Procedure (see above). Note: Steps 3 & 4 may be omitted as removal of the Light Barrier and its Mounting Guide is not required. 2.
Page 19
Jack Panel Screw Removals 6. Disconnect 2 Connectors from the top of the Rear Switch Panel. This Panel fastens to the Jack Panel Cover and may easily be removed or reconnected once the Jack Panel Cover is completely free of the Chassis Assembly.
Page 20
Small Signal Panel (SSM) 1. Remove rear Jack Panel cover (AC08). 2. Remove 2 screws from the center of the SSP CBA. 3. Pull 3 tabs on right of panel bracket. 4. Lift right side of SSP, then move to the right to remove. Side Jack Panel 1.
Disassembly Procedures (43 Inch) All numbers found in the following text refer to the CABINET DISASSEMBLY EXPLODED VIEW drawing for 43” models. NOTE: If you are servicing a PCB or speaker, you do not have to remove the plastic upper Back cover. Lower Back Cover (AC04) 1.
Page 22
Mirror (AC18) Removal 1. Perform Lens Frame removal procedure. 2. Remove 4 screws located in the mirror mounting brackets and remove the mirror. Note: Care should be taken NOT to place fingerprints or smudges on the mirror. Large Signal Panel (LSB) 1.
Page 23
Picture Tube Replacement Refer to CRT Assembly Exploded View Replacement of the cathode ray tube (CRT) and/or optical system components of a Projection TV (PTV) can be easily accomplished by following general guidelines. Use care when working around the CRT and optical systems of the PTV.
Page 24
B. Removing the PTV Coupling Fluid All repairs made to the CRT/optical block assembly require the removal of the coupling fluid. The following procedure describes how to remove the PTV coupling fluid. Lay the CRT assembly on its side with the plug pointing up. Remove the plug (X8).
Page 25
D. Replacement of the CRT Remove CRT coupling fluid as described in steps 1b through 13b. Remove the plastic protective coating (if present) from the faceplate of the replacement CRT. Refer to "Replacing the CRT Coupling Fluid" to complete the CRT replacement. E.
Page 26
HDR2002 Service Adjustments Manual 7621 DPTV300 Series Chassis Adjustments The following topics are covered: Service Modes Error code buffer and error codes The “blinking LED” procedure Trouble shooting tips Customer Service Mode Measurements should be performed under the following conditions: Video: color bar signal Audio: 3kHz left, 1kHz right Panel Location Guide...
Page 27
Voltage Checks Display DPTV300 Series Voltage Diagram...
Page 28
Service Default Mode (SDM) Introduction The Service Default Mode (SDM) is a technical aid for the service technician. The Service Default Mode (SDM) establishes fixed, repeatable settings of customer controls, which allow consistent measurements to be made. The SDM also initiates the blinking LED procedure and, if necessary, overrides the 5V protection. The SDM places the set in the following pre-defined conditions: Tuning frequency set to channel 3.
Page 29
Special SDM functions Access to normal user menu Pressing the “MENU” button on the remote control switches between the SDM and the normal user menus (with the SDM mode still active in the background) Run timer, software identification, and error buffer Press the Status button on the remote control to toggle the OSD (except “SDM”) ON and OFF to prevent the OSD from interfering with measurements and oscilloscope waveforms.
Page 30
Display SAM Menu Explanation of SAM Menu: Operation Hours (Run Timer): This display indicates the accumulated total of operational hours. (Shown in hexadecimal format) Software identification of the main micro controller (2US1-2.045) LCHDR is the engineering chassis name for the HDR2002-PTV chassis. US1 is 2 letter and 1 digit combination to indicate the software type and the supported languages: US = NAFTA 1 = Main Software language version number...
Page 31
Menu and Sub-menu Definitions Clear Errors Erases the contents of the error buffer. Select the CLEAR ERRORS menu item and press the cursor LEFT or cursor RIGHT key. The contents of the error buffer are cleared. The functionality of the OPTIONS and ALIGNMENTS (TUNER, WHITE TONE, GEOMETRY, SOUND, and SMART SETTING) sub-menus are described in the service adjustments.
Page 32
Error Code Table Error Explanation Valid for Addresses Remarks number PEMG99 in HCS No error FBX 3V3 protection No Horizontal Flyback protection GDE reported critical error HFB error X-Ray protection Must have been supported by GDE. But it is not so. GDE reported critical error Significance changed to: GDE critical error –...
Page 33
I/O expander IC M62320P I 2 C failure (DW & PIP) Guide+ I 2 C failure V-chip for PIP, IC ZILOG 86130 I 2 C failure (TBC) NV clock IC MK41T56 I 2 C failure Flash protection (detected via Bocma) Bocma IC TDA888xx (on DW panel) I 2 C communication Virtual Dolby error...
Page 34
The Blinking LED Procedure The contents of the error buffer can also be made visible through the “blinking LED” procedure. This is especially useful when there is no picture. When the SDM is entered, the LED will blink the number of times equal to the value of the error code. Error-codes equal to or greater10 are shown in the following manner: A long blink of 750 mSeconds indicating the decimal digit, followed by a pause of 1500 mSeconds.
Page 36
PIPF PIP Function PIPT PIP Tuner PLST Program List SBNP Auto Standby with No Picture SMCK Smart Clock SOSD Smart OSD SPKC Speaker Control SURF Surf Feature available TIME Time Feature available via Features menu TMWIN Time Window VBNR V-Chip Block No Rated Menu VCBK V-Chip Block Un Rated Menu VDBY...
Page 37
Smart Settings Enter the Service Alignment Mode (SAM) by pressing the following key sequence on the remote control transmitter: 0-6-2-5-9-6-STATUS Do not allow the display to time out between entries while keying the sequence in. It is also possible to enter the Service Alignment Mode by pressing the “VOLUME +” and “VOLUME -” key on the local keyboard simultaneously for at least 4 seconds when the set is in SDM.
Page 38
GDE SAM MODE DEFAULTS TABLES GDE SAM REGISTER NAME DEFAULT VALUE DEFAULT VALUE DEFAULT VALUE DISPLAY MODE 480p 1080i FULL 1080i COMP SERV BLANK GEOMETRY WIDE BLANK HOR SHIFT HOR. PARALLEL EW. WIDTH EW. PARA EW. TRAP HOR. BOW VER. SLOPE VER.
Page 39
ELECTRICAL FOCUS ADJUSTMENT Note: Before beginning the following adjustment procedures set the customer picture, sharpness, brightness, and tint controls to midrange and the customer color control to minimum. Electrical Focus Adjustment 1. Remove the back cover of the set and the light shield, then turn the set on and inject an NTSC crosshatch pattern signal into the antenna terminal.
Page 40
Note: Upon completion of CRT/optical assembly repair, the centering, convergence, gray scale, mechanical and electrical focus adjustments are required. If more than one assembly requires repair, it is recommended the service technician fully complete one assembly at a time, using the existing assemblies as a reference for the alignment of the centering and convergence.
Page 41
Remove the four CRT mounting bolts (A) (with springs and spacers) and remove the mounting bracket (D). Remove the four CRT mounting ear screws. Note: The CRT mounting ear screws are not used on some assemblies. Gently remove any metal shavings from around the screw holes. Do not allow the metal shavings to get into the fluid.
Page 42
F. Replacing the PTV Coupling Fluid Note: Prior to replacing the CRT coupling fluid, ensure the expansion chamber bladder is fully collapsed. This can be easily inspected by viewing the bladder through the small hole on the expansion chamber assembly. If the rubber of the bladder is not easily visible through the small hole, then the bladder may be considered collapsed and fluid can be added.
Page 43
Convergence and Geometry adjustments Completely read the Setup section before proceeding with any adjustment. The set should be allowed to warm up for at least 20 minutes before any adjustments are made. Introduction There are six new screen sizes for the High Definition Ready sets for the 2002 model year. Model Chassis Screen...
Page 44
This adjustment procedure is divided into the following sections: Screen Centering Geometry Alignment Convergence Alignment Grey Scale Alignment If the ACS module has been replaced, the following adjustment should be performed in the order listed: Geometry Convergence Grey Scale If the Large Signal Board (LSB) has been changed: Screen Centering Geometry Convergence...
Page 45
Geometry settings are located in the GDE SAM mode. Press the Cursor down button to highlight the GDE SAM then press the Right Cursor button to select. The following menu will appear: If the CRTs have been replaced, a Screen Centering adjustment will be necessary. Apply a crosshatch pattern to the set.
Page 46
Geometry Default Values Mode 1 Mode 2 Mode 3 480p 1080i 1080i, Comp Wide blank Horizontal Shift Horizontal Para E-W Width E-W Para E-W Trap Horizontal Bow Vertical Slope Vertical Amp S Correction Vertical Shift Fast Blank To exit the Service Alignment Mode (SAM), press the Menu key to return to the main SAM menu. Then turn the set Off.
Page 47
Convergence Menu Flow Diagram Use the Cursor Up-Down button to highlight the selection. Press the Cursor Right button to make the selection. In the second menu, MANUAL CONVERGENCE WO VIDEO means that the screen behind the adjustment grid will be blank. MANUAL CONVERGENCE W VIDEO displays the applied video behind the adjustment grid. RESTORE FACTORY loads the values from the last saved convergence alignment.
Page 48
Green Geometry The Green Geometry must be done first when performing a complete convergence alignment. A Screen Template is necessary to obtain the correct geometry. Failure to use the Screen Template or misalignment of the convergence will result in reduced life of the Convergence amplifiers. Place the Screen template on the TV screen.
Page 49
When the ACS module has been replaced and Default settings have been loaded, the following procedure should be used to adjust the convergence. Otherwise use the Cursor Up-Down and Right-Left buttons to Navigate to the area to be adjusted. Press the Menu button to adjust then use the Cursor buttons to move the Green cross onto the Template.
Page 50
Gray Scale Alignment 1. Place the input to the RGB (Aux 5) or Y Pb Pr (Aux 4) mode. Connect a Computer or Computer monitor generator to the Aux 5 input or a Component Generator to Aux 4. 2. Preset the G2 controls counterclockwise. 3.
Page 51
SAM Screen Display The Geometry alignments are in the GDE SAM selection. Use the cursor up-down button to highlight the item. Use the right cursor button to select the item. Use the Menu button to return to the previous menu. The following menu will appear when GDE SAM is selected.
Page 52
Customer Service Mode (CSM) All HDRPTV sets are equipped with the “Customer Service Mode” (CSM). CSM is a special service mode that can be activated and deactivated by the customer, by request of the service technician/dealer in order to identify the status of the set.
Page 53
The Customer Service Menu shows the following information: Line 1 : “HRS : nnnn” and SWID : “2US1-BBC-X.YY” HRS: Indicates the accumulated total of operational hours. (Shown in hexadecimal format.) (Standby hours are not counted as operating hours). SWID: Software identification of the main micro controller (2US1-TTR-1.00) LCHDR is the chassis name for the HDR2002 PTV.
Page 54
Line 6 : “TIMER ON ” Indicates that the on/off timer is running. The following Complaints may be caused by the activation of the sleep timer: The set may turn on from standby or may switch to a different channel without using either the remote control or the local keyboard.
Page 55
Line 14 : “TINT” Value indicates level at CSM entry. Line 15 : “COLOR” Value indicates level at CSM entry. Line 16 : “BRIGHTNESS” Value indicates level at CSM entry. Line 17 : “PICTURE” Value indicates level at CSM entry.
Page 56
INTRODUCTION The HDR2002 is designed for the 2002 model year. The set is a High Definition Ready Projection television. High Definition Ready means the set will accept HDTV analog inputs. It does not have an ATSC tuner. The set is designed to accept RF, Component, and Composite signals in the NTSC format, Progressive Scan format, or 1080I Y Pr Pb formats.
Page 57
Overall Power Supply Block Figure 1 The Bridge rectifiers and Standby supply are located on the Input Panel. The Main Power supply is located on the Large Signal panel. The Standby supply produces +5 volt standby voltage. When the set is turned On, the Standby line goes Low, switching the Standby supply to produce +15 volt, +9 volt, and +5.2 volt sources.
Page 58
Standby Power Supply Figure 3 Standby B+ is applied to the Standby Switching regulator 7218 via Pins 5 and 3 of 5202. An internal switch in 7218 charges capacitor 2283 connected to Pin 1 of the IC. When the charge on 2283 reaches 5.8 volts, the internal switch switches to internal.
Page 59
Under Voltage Detection Figure 4 If the 15-volt supply drops below 11.2 volts, transistor 7221 will turn Off. The 5-volt standby supply will be applied to the base of 7220 via resistors 3262 and 3263. This will cause the +15UV line to go High. In the Standby mode, the Standby line is High turning transistor 7222 On.
Page 60
Full Power Supply Figure 5 The Full Power supply is located on the Large Signal panel. The Raw B+ voltage from the Input panel is applied to the Full Power switching transistor, 7301, via Pins 6 and 8 of transformer 5300. This voltage is protected by Fuse 1300 and filtered by Choke 5330.
Page 61
The Full Power supply produces two 130 volt, a 35 volt, a 22 volt, a minus 22 volt, a minus 35 volt, a plus audio supply, and a minus audio supply. The Audio supply is a plus and minus 19 volts in sets that use the 20-watt audio amplifier.
Page 62
is rectified by 6306 and the negative 22-volt supply is rectified by 6307. The voltage The +22-volt supply on Pin 18 of 5300 is monitored to detect a failure of the AC supply to the set. This circuit signals the Microprocessor in the event that AC is removed from the set while it is turned On.
Page 63
panel for the Picture in Picture information to be inserted. After insertion of the PIP information, the YUV signal is fed back to the SSB. A line doubler circuit on the SSB called the Feature Box changes the interlaced NTSC signal to a Progressive Scan signal. This YUV signal is buffered and fed to the HOP panel.
Page 64
The Side Jack panel has a Composite Video and SVHS input. There is a left and right channel audio input. When there is a connector in the SVHS input, the Composite input is muted. A switching circuit signals the Microprocessor when there is something plugged into the SVHS or Headphone connectors.
Page 65
SSM Video Switching Figure 10 IC 7017 located on the SSM performs the Video and Audio switching for the Composite inputs to the SSM. Selected Y or Composite video is output on Pin 1 before being fed to the SSB. Selected C is output on Pin 3 and is fed to the SSB.
Page 66
SSB Video Switching Figure 11 Selected Composite video from the SSM is fed to HIP 7323 located on the SSB. IF from the main Tuner located on the SSM is fed to the SSB via connector 0302 to the SAW filter 1408 and to Pin 2 and 3 of 7323. Composite Video is output on Pin 10 and is buffered by 7411 before being fed to the PIP panel via the SSM in the Basic version only.
Page 67
NTSC Component Buffer Amplifiers Figure 12 The Y signal is buffered by transistors 7800 and 7801. This is an impedance matching circuit. This circuit does not invert the signal. The Pb signal is amplified by 7802 and buffered by 7803. The Pr signal is amplified by 7804 and buffered by 7805.
Page 68
There are two different PIP versions in the HDR2002. The Basic and Basic Plus versions use a Standard Single window PIP. The Core Versions have a Double Window PIP that is capable of showing a Standard PIP, small window, or a double window, split screen. Standard PIP Signal Flow Figure 13 The Standard PIP comes in two versions: Single-Tuner with no tuner on the PIP panel and two- tuner...
Page 69
Standard PIP Switching Figure 14 Control for the PIP panel is performed by 7910 via the I2C buss. SEL_TUNER1 and SEL_TUNER2 control the composite switching to the SSB panel. S1, S2, and S3 control the tuner aux switching IC, 7801.
Page 70
Standard PIP Power Supply Figure 15 The PIP panel is powered by +5-volt, +8-volt, and +33-volt supplies from the Small Signal Module (SSM). A 3.3-volt regulator supplies power to the PIP processor, 7803. Double Window PIP Figure 16...
Page 71
The PIP/Double Window panel allows for both a standard PIP window and a split screen. The PIP/Double Window module has a separate Tuner, SAW filter, and Signal Processor. The output of the Signal Processor, 7301, on Pin 16 is fed to switching IC 7402 which selects between the PIP Tuner and Composite Video from the SSB.
Page 72
The PIP or Double Window YUV signal is fed to the PIP/DW processor, 7801. The I2C buss controls the IC from the Microprocessor on the SSB. The PIP/DW processor outputs YUV for the PIP window or Split Screen to the YUV switch,7803, where it is mixed with the YUV signal from the SSB for the main picture.
Page 73
Feature Box Figure 19 The YUV signal from the PIP module is fed back to the SSB on connector 1682, Pins 6, 8, and 9. This circuit is called the Feature Box. The Feature Box changes the picture from a 15734 Hz NTSC interlaced signal to a 480P progressive scan signal at 31468 Hz.
Page 74
The PROZONIC (Progressive Scan-Zoom and Noise) IC converts to a digital signal from the PICNIC, which is a 15734 NTSC digital signal to a Progressive Scan digital signal at 31468 Hz. ICs 7714 and 7715 are Memory ICs, which store the video fields as they are being processed by 7708. The two fields are recombined in the Line Memory inside 7708.
Page 75
The Y-SSB, U-SSB, and V-SSB signals are fed to buffer amplifiers located on the SSM. Transistors 7806 and 7807 buffer the Y signal. The U signal is buffered and inverted by transistors 7810 7811. The V signal is buffered and inverted by transistors 7808 and 7809. The YUV signals are then fed to the HOP panel via connector 1250.
Page 76
HOP Signal Processing Figure 22 The Y/G, B/Pb, and R/Pr signals are fed to their respective sharpness controls. If the input is a YUV signal, the Y signal is fed to Pin 28 of 7600. The U and V signals are fed to the Tint Control circuit and then to Pins 27 and 26 of 7600.
Page 77
Horizontal and Vertical Sync is fed to 7600 on Pins 23 and 24. IC 7600 processes the sync to provide the geometry for the picture. Horizontal drive is output to the sweep circuit on Pin 8. Vertical drive is output on Pins 1 and 2. East West drive is output on Pin 3. Sandcastle (SCO) is output on Pin 9. Horizontal Feedback (HFB) from the sweep circuit is fed into the Phase Loop to phase correct the Horizontal drive.
Page 78
The Blue signal is fed to Pin 1 of 7410. It is also fed to a Low Pass filter consisting of 5411 and 5410. This path is amplified by transistor 7411. The Low Pass filter blocks the Higher frequencies as well as shifting the phase of the signal.
Page 79
RGB Amplifiers Figure 25 The output of 7600 is fed to the RGB amplifiers before being fed to the CRTs. Transistors 7720 and 7721 buffer the Blue output on Pin 42. The B-BIAS control voltage controls the gain of this circuit. Transistors 7730 provide an additional voltage gain for the signal.
Page 80
The Red output from Pin 40 of 7600 is buffered by 7700 and 7701. The R-BIAS controls the gain of the circuit. The drive of the Red and Green outputs are compared with the Blue drive by 7900-A. The difference signal is fed back to 7600 via the ABL line.
Page 81
CRT Panel Figure 27 The Red, Green, and Blue signals from the HOP panel are fed to their respective CRT panel. The signal is fed to the emitter of 7200 and then to 7202. The output of 7202 is fed to Pin 2 of 7201, which drives the cathode of the CRT.
Page 82
Horizontal and Vertical Sync from the SSB is fed to the HOP panel via the SSM panel when NTSC is used as the signal source. In sets with the D Shell RGB input, 7110 switches between the Vertical and Horizontal Sync on the cinch connectors or the Sync from Pins 13 and 14 of the D Shell connector.
Page 83
Vertical Output Amplifier Figure 30 The Vertical drive from the HOP panel drives the Vertical Output IC 7811. This IC is located on the Large Signal panel. Drive is fed to Pin 7 and is output on Pin 5 to drive the three Vertical Yokes. This IC is powered by the plus and minus 13-volt supplies from the Horizontal Output circuit.
Page 84
High Voltage Circuit Figure 31 The High Voltage module is an integrated High Voltage supply with its own switching power supply. When the set is turned On, 11.5 volts from the Sweep Failure detection circuit is fed to diode 6913 and to Pin 8 of the High Voltage module.
Page 85
High Voltage Shutdown Figure 32 The Shutdown circuit will shut the High voltage Off if the Horizontal or Vertical Sweep should fail. It will also shut the High voltage Off if the Power Fail line goes High or the +200-volt source should fail. The Vertical pulse is fed to zener diodes 6824 and 6814, which keeps capacitor 2837 charged.
Page 86
Convergence Processor Figure 33 The Convergence data is stored in the EEPROM, 7000. The Microprocessor located on the ASC module reads 1,971 bytes of data from 7000 and writes it to the Convergence Processor, 7002. Horizontal sync is inverted by 7026, buffered by 7025, and fed to Pin 27 of 7002. Vertical sync is inverted by 7027, buffered by 7028, and fed to Pin 28 of 7002.
Page 87
Intellisense Convergence Correction Figure 34 The Philips Intellisense system makes minor Convergence corrections when the feature is selected by the Customer. When a PTV is moved from one location to another, minor Convergence errors will occur due to changes in the Earths magnetic field. When Save is selected during the Convergence Alignment, the set scans four optical sensors with each of the three colors.
Page 88
Intellisense Sensing Circuit Figure 35 The output of the four sensing Solar Cells are fed to IC 7141 located on the ACS module. Inputs TBU0, TBU1, and TBU2 from the Convergence Microprocessor are fed to the Decoder which selects the Solar Cell to be read. The output on Pin 3 is fed to Pin 2 of 7140-A. 7140-A matches the low impedance output of 7141 to the high impedance input of 7140-B.
Page 89
Convergence Horizontal Output Figure 36 IC 7044 amplifies the Horizontal convergence waveforms. The correction waveforms are fed to the IC on Pins 6, 14, and 15. They are output to the Convergence Yokes on Pins 9, 11, and 18. The IC is powered by four supply inputs.
Page 90
Audio Overall Audio Block Figure 38 IC 7017 located on the SSM selects Left and Right channels of audio and feeds them to the Audio Processor, 7651, located on the SSB panel. The Audio processor selects between the two audio channels from the SSM or internally decoded audio from selected audio IF on the SSB.
Page 91
Audio Amplifier Figure 39 The Audio Amplifier is located On the SSM. The output power for the Audio Amplifier is 10 watts per channel for the Basic and Basic Plus versions. The Core Version has an output of 15 watts per channel.
Page 92
Shutdown Mute Figure 40 The Audio Amplifier will be placed in a Standby mode and the set will shut down if a DC voltage is detected on the Speaker Output lines. The Left and Right audio output lines are connected to the base of 7704 and the emitter of 7705 via resistors 3718 and 3717.
Page 93
Center Channel Amp Switch Figure 41 The Core versions have a Center Channel amp switch located on the rear of the set. The Output of the Audio Amplifier on the Basic and Basic Plus versions is fed directly to the speakers. In the Core sets, the Output is fed to the Center Channel amp switch before being fed to the speakers.
Page 94
Headphone Amplifier Figure 42 IC 7403 is the Amplifier for the Headphone output. The volume control for the Headphone output is on the Audio Signal processor located on the SSB. The Headphone Amplifier is located on the SSM. The output of the amplifier on Pins 1 and 7 is sent to the Headphone Jack located on the Side Jack panel.
Page 95
Microprocessor Figure 43 The HDR2002 has two microprocessors. The Microprocessor, 7001, on the SSB monitors the Keyboard and the Remote sensor during standby. This IC controls the Tuner, Video switching on the SSB, generates the consumer OSD. Pin 5 of 7001 monitors the Keyboard for a voltage change to generate a command. The Front Detect line on Pin 6 monitors the AV inputs on the Side Jack panel.
Page 96
IC 7100 controls the ACS module and the HOP module. The OSD output of 7100 displays the Convergence Service mode. Sync on Pins 53 and 55 synchronize the OSD. The A bus communicates with the Microprocessor on the SSB, the B bus communicates with the Memory IC,7000, and the Convergence processor.
Page 97
On-Screen Display Figure 45 Signal for the OSD (On-Screen Display) comes from three different sources. IC 7001 located on the SSB (Small Signal Board) generates all the customer menus except for Convergence. In the SAM (Service Alignment Mode), the menus are generated by 7001 except those in the GDE SAM.
Page 98
Board Level Troubleshooting using the Wiring Interconnect Figure 46 Before the set can be repaired to a component level, it is necessary to determine which board is defective. The Wiring interconnect diagram is a useful tool for this. Dead Set The Standby Power supply and Rectifiers are located on the Input panel.
Page 99
No Picture If Audio is present but there is no Picture, press the Index button on the Remote control. If OSD is present, High Voltage is working, and the CRT drive circuits are working. If the signal is NTSC, YUV from the SSM is fed to the HOP on connector 1250.