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ATC113 ALIGNMENT PROCEDURES
Operating Conditions
Unless otherwise noted, the following conditions must be observed when aligning the ATC113 chassis: 1. Chassis must be operated from a 120VAC isolation transformer, with line voltage set to 120VAC (±2.0V). 2. Picture controls (brightness, contrast, etc.) must be set to factory presets via the Picture Quality menu presets item or reset on the remote transmitter. 3. Procedures must be performed in the sequence given. 4. A 10X probe must be used for oscilloscope and frequency measurements. 5. Minimum warm-up time is 10 minutes Personal Computer: IBM or Compatible 486DX 66 meg PC (or LAPTOP) with 16 MEG Memory, VGA Monitor, one 3 1/2 floppy drive, 540 Meg or larger hard drive, compatible mouse, one parallel port dedicated for service interface box and one port for mouse, Windows 95, 4X CD ROM, Printer and Sound Card. Isolation Transformer: Digital Voltmeter: Range .1V DC to 1000V DC, Accuracy: ± .5%/ True RMS Voltmeter: Range: 01 to 1000 Volts ± .5% Accuracy DC Voltage Supply: Range: 0 to 50V, 2AWell Filtered Temperature Controlled Soldering Station: Grounded Tip TypeTip Temperature 500F to 800F Adjustable Frequency Counter: Range: 50Hz to 100 MHz Sensitivity: 25mV to 5V. Equipped with Lo-Cap Probe (10:1 Attenuation) AC Variac: Continuously Variable. Isolation Type Preferred NTSC Video Signal Generator: Must provide 1V P-P Negative Sync, Video into 75-OHM input. Produce, standard NTSC 75% Saturated Color Bars with 100% White Window. (B&K 1249, or equivalent) RF Signal Generator: 100 kHz to 150 MHz .1V RMS, Int. Mod. 1KHz 30% TAG001 Tuner Alignment Generator (stock # 215568) or equivalent: Equivalent Generator must have RF output capabilities for cable channels 1-125. Cross Hatch Generator: Must have RF output. S-Video Source: Must provide standard Y-C separated signal. SVHS output of VCR, DSS or DVD will suffice Dual Trace, Delayed Sweep Oscilloscope: 25 MHz with Channel invert capability. Sensitivity 5mV/cm Maximum Sweep Rate: .1us/cm. Hot Air Desoldering Station: MTS TV Stereo Generator: Must produce L-R, L+R, SAP at 300 Hz, 1KHz, 8KHz(B&K 2009, or equivalent). Chipper Check® software: Chipper Check® interface box NOTE: All alignments with the exception of basic color temperature and geometry require the use of Chipper Check® software and interface box.

Service Mode

ATC113 ALIGNMENT PROCEDURES

Most of the alignments for this chassis are software-driven. Adjustments are made by modifying parameter values using Chipper Check and the service menu. When parameter values are modified, the corresponding T-chip registers, tuner registers and EEPROM locations are updated. A list of the software alignment parameters accessible using the front panel is shown in Table 1. All other alignments require Chipper Check® Using the Front Panel Controls to enter Service Mode 1. 2. 3. Turn the instrument on. Press and hold the MENU button. a. Press and release the POWER button. b. Press and release the VOL+ button. Release the MENU button.

Once the security code has been set, individual alignments can be accessed by pressing CH /\ or CH \/ changing the parameter (P) number.

Once a parameter ( P ) has been selected for a particular alignment the VOL + and VOL - buttons can be used to change the value ( V ) of the alignments selected. Parameters available through the front panel are shown in table 1.

Parameter # Parameter name Value range Notes and comments Security pass- number, must be set to 76, must not advance to other parameters until value set 00 Instrument Parameter:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Error Detection (1st) Error Detection (2nd) Error Detection (last) Main RF_AGC AKB OK Status Red Cut-off Green Cut-off Blue Cut-off RG Drive Gain B Drive Gain Sub Contrast Sub Brightness Sub Color Sub Tint Horizontal position Vertical phase Vertical Size Vertical Centering Vertical Linearity VS Correction Horizontal Size EW Parabola Correction EW Trapezium Correction EW Correction Top EW Correction Bottom RF AGC for 2nd Tuner Audio Input Level Audio Stereo VCO Audio Filter Setting Audio Low Band Audio High Band Audio SAP VCO PIP Comb D/A Level PIP Contrast PIP CVBS Coarse Tint PIP CVBS Fine Tint PIP CVBS Saturation PIP S-Video Coarse Tint PIP S-Video Fine Tint PIP S-Video Saturation PIP Brightness PIP BP Clamp Adjustment Align Gemstar Horizontal Align Gemstar Vertical Service H Gemstar Pip Service V Gemstar Pip Service Gemstar Pip Size V_EHT H_EHT SVM_Ph ? ? ? 0 - 63 1 0 - 31 0 - 31 0 - 31 0 - 127 0 - 127 0 - 15 0 - 33 0 - 33 0 - 33 0 - 31 0-7 0 - 127 0 - 63 0 - 15 0 - 15 0 - 31 0 - 63 0 - 63 0 - 31 0 - 31 0 - 31 0 - 63 0 - 63 0 - 63 0 - 63 0 - 63 0 - 63 0 - 127 0 - 127 0-7 0 - 255 0 - 127 0-7 0 - 255 0 - 127 0 - 31 !247! 73-185 10-160 5-80 20-100 0 - 13 0-7 0-7 0-1 First Error Code Second Error Code Last Error Code This data is for reading only

Required Test Equipment

The following Service Mode Screen will be displayed.

Service Mode Screen The Parameter (P) number is on the left side of the display and represents the function that will be performed. The Value (V) is on the right side of the display and represents the decimal value stored for the function selected. Once the Service Mode Security Code has been entered the CH /\ and CH \/ buttons on the front panel (or the remote transmitter) are used to change the parameter (P) number. The VOL + and VOL buttons are used to change the decimal value (V) of the function. NOTE: When the service mode is accessed, the parameter will be 0. Parameter 0 is used to input the security code. The security code is necessary to protect the factory alignments from inadvertent modification. Attempting to change the parameter (P) using CH /\ or CH \/ before the proper security code has been entered will cause the instrument to exit the service mode. A valid security code is entered (using VOL + or VOL -)

Activates PIP Window

Activates PIP Window Activates PIP Window Activates PIP Window Activates PIP Window Activates PIP Window Activates PIP Window Activates PIP Window Activates PIP Window Activates PIP Window Do not change this default data (247)

Security Codes

When the Service Mode is first entered, the parameter (P) will come up set at 0, which corresponds to the security code function. With the parameter (P) set to 0 adjust the value (V) (using VOL + or VOL -) to 76 for access to the Front Panel Service Mode. Set the value (V) to 200 for Chipper Check® operation.

NOTE: Before making any adjustments using the Service Mode Screen record the current values for all parameters so that the instrument can be returned to its current status.

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ATC113 ALIGNMENT PROCEDURES
Error Codes If certain failures occur in the chassis, error codes will be stored in the chassis EEPROM. These error codes are displayed in parameters 1, 2 and 3. Parameter 1 stores the error code for the first failure experienced by the instrument. Similarly, parameter 2 stores the error code for the second failure. Parameter 3 is automatically updated to display the error code for the most recent failure experienced by the instrument. Error codes are summarized in Table 2. The presence of a 0 in the error code values indicates that no failures have occurred since the last time the error code parameters were reset. NOTE: The error codes should be reset to 0 after servicing using the VOL + and VOL - buttons. Because a failure of a bus IC is a possible reason for needing service, normal acknowledgment checking is disabled in the service mode. If an IIC device has failed, its address will be stored in the error code area.

ATC113 ALIGNMENT PROCEDURES
ATC113 Tuner Alignment AGC Alignment Main Tuner
Test Point: Adjust: 1. 2. 3. Pin #1 Tuner NH01 Parameter #04 Range: 0 - 63 3. 4. 5. color saturation. Put the instrument into Service Mode. Adjust Vertical Phase ( course vertical centering, parameter #16 ) to center the display as close as possible, using the center of the crosshatch as a reference. Adjust Vertical Centering (fine centering adjustment, parameter #18 ) to center the display, using the center of the crosshatch as a reference.

Error code: (H ex) (D ec)
00 03 08 09 0A 0B 10 12 2C B0 B4 90 C4 C6 0 3 8 9 10 11 16 18 44 176 180 144 196 198

D evice
D etected by m icro T 4-Chip T 4-Chip F2PIP Stereo D ecoder D etected by m icro D etected by m icro F2PIP Stereo D ecoder T hree Line Comb Filter V ideo M atrix Switch M ain T uner M ain T uner

C ondition
N o error code throw n 12V R un fault X R P event detected Pow er on reset Pow er on reset Pow er on reset R un I2C clock or data clam ped at logic state zero Standby I2C clock or data clamped at logic state zero N o acknow ledge from device N o acknow ledge from device N o acknow ledge from device N o acknow ledge from device PLL bus fault D A C bus fault

4.

Connect a signal generator with a Color Bar pattern to the instruments Main Tuner RF input and adjust the generator for a 1mVrms signal at 193.25MHz (CH10). Put the instrument into Service Mode. Connect a digital voltmeter to Pin#1 of the Main Tuner (NH01). Adjust Main RF_AGC (parameter#04 ) starting from step 63. Normally at step 63 the voltmeter should read approximately 4.1V. Using the volume down button decrease the parameter value until the voltage is less than 3.9V. Increase the value by one (1) for the correct setup.

ATC113 Geometry Alignment Horizontal Phase Adjustment
Test Point: Adjust: 1. 2. Observe Display Parameter #15 Parameter #21 Range: 0 - 31 Range: 0 31

NOTE: There is a center indentation on the sides of most tubes in the shadow mask that can be used for centering. 6. Adjust Vertical Size (parameter #17) so that the entire crosshatch pattern is visible on the screen. 7. Adjust VS Correction ( parameter #20 ) so that boxes at the top and bottom of the screen are equal in size to the boxes in the center of the pattern. 8. Adjust Vertical Linearity ( parameter #19 ) so that the boxes at the top and bottom of the crosshatch pattern are an equal distance from the top and bottom of the screen. 9. Adjust Vertical Size (parameter #17) so that approximately 3.75% of the crosshatch pattern is hidden at both the top and bottom of the display (7.5% over scan +/2.5%) EXAMPLE: If the crosshatch display has 12 blocks vertically, adjust so that ~ 1/2 block is hidden at both the top and bottom of the display (0.5/12 = 4.1%). 10. If necessary repeat steps 5 to 9 to obtain an optimum picture.

Exiting Service Mode

Service mode can be exited at any time by pressing the POWER button. New data is stored in the EEPROM when you exit.

CHASSIS ALIGNMENT

X-Ray Shutdown Check

The following procedure should be performed prior to, and upon completion of service: 1. Momentarily apply a short between the shutdown test point (BL901- located at back edge of chassis near main tuner) and chassis ground (main tuner shield). The instrument must shutdown immediately, then turn back on after ~ 2 seconds. 2. Apply and maintain a short between the shutdown test point and chassis ground (tuner shield). The instrument must shutdown immediately and remain shutdown (the instrument will attempt to restart several times, then remain off). 3. Remove the short from BL901. 4. Enter the Service Mode and reset the error code parameter(s) to 0.

The ATC113 chassis requires the use of ChipperCheck®, a TV/PC interface box, and a suitable computer for the majority of the alignments. A 486DX/33MHz PC with 8Meg of memory is recommended. Basic geometry and color temperature adjustments are the only alignments accessible through the front panel. These adjustments are included in this service manual as front panel procedures but can also be performed using ChipperCheck®. ChipperCheck® software and the TV/PC interface box are available from Sencore Electronics @:

3. 4.

5.

Using a signal generator tune the instrument to receive a crosshatch pattern . Adjust the instrument for 50% brightness, contrast and color saturation. Put the instrument into Service Mode. Adjust the Horizontal Position (parameter #15) until the center of the pattern is an equal distance from the left and right edges of the display. (Note: with a crosshatch pattern the partial blocks on the left and right edges of the screen should be equal.) If the picture tube is 31" or greater, Adjust Horizontal Size (parameter #21 ) so that 5% of the crosshatch pattern is hidden at both the left and right edges of the display. (10% over scan +/- 2.65%). The width is not adjustable for smaller screen sizes.

Pin Cushion Adjustments.
(Used for 27TF/27VHP/32/36V instruments only) Test Point: Observe Display Adjust: Parameter #22 Range: 0 - 63 Parameter #23 Range: 0 - 63 Parameter #24 Range: 0 - 31 Parameter #25 Range: 0 - 31 1. 2. 3. 4. 5. 6. 7. Tune the instrument to receive a crosshatch signal. Adjust the instrument for 50% brightness, contrast and color saturation. Put the instrument into Service Mode. Preset EW Parabola Correction (parameter #22) and EW Trapezium Correction (parameter #23) to the mid-range (value 32). Adjust EW Correction Top (parameter #24) so that the vertical lines in the top left and right corners of the display are straight. Adjust EW Correction Bottom (parameter #25) so that the vertical lines in the bottom left and right corners of the display are straight . Adjust the EW Parabola Correction (parameter #22) so that the vertical crosshatch lines on the left and right edges of the display are straight. Repeat steps 5 & 6 if necessary produce a straight vertical line. Adjust the EW Trapezium Correction (parameter #23) so that the vertical lines at the edge of the pattern are straight and parallel to the sides of the tube mask.

http://www.sencore.com/
or

Tel. 1-800-SENCORE
(1-800-736-2673) Instructions for the operation of ChipperCheck® software and connection of the TV/PC interface are included as contextsensitive help files in the ChipperCheck® software.

EXAMPLE: If the crosshatch display has sixteen blocks horizontally, adjust so that approximately 3/4 of a block is hidden at both the right and left sides of the display (0.75/16 = 4.6%). 6. If necessary repeat steps 1 to 5 to obtain an optimum picture.

Vertical Adjustments
Test Point: Adjust: Observe Display Parameter #16 Parameter #17 Parameter #18 Parameter #19 Range: 0 - 7 Range: 0 - 127 Range: 0 - 63 Range: 0 - 15

8.

1. 2.

Tune the instrument to receive a crosshatch pattern. Adjust the instrument for 50% brightness, contrast and

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ATC113 ALIGNMENT PROCEDURES
9. Repeat steps 4-8 until vertical lines are straight over the entire screen.

ATC113 ALIGNMENT PROCEDURES
Screen Adjustment
Test Point: Adjust: Check: 1. 2. 3. R,G,B pins on CRT Screen Control Parameter #5 Pins 6,8,11 Main PCB Range: 3 2. 3. 4. 5. Access the customer control Main Menu. Select Picture Quality. Select Picture Presets and then select Normal Lighting. This resets the customer controls. Monitor the Blue cathode on Pin 11 of the CRT with an oscilloscope. Put the instrument into Service Mode. Preset the Sub Color (parameter#13 ) and Sub Tint (parameter#14 ) to a mid-range value of 16. Using the analyzers first test probe to read low light signal, adjust the sub-brightness (parameter 12), until Y reads 1 ± 0.5 nits. Alternate Method: Test Point: Blue CRT Pin #11 Adjust: Parameter #12 Range: 0 - 33 1. 2. Apply a gray scale pattern to the instruments RF input. Set Brightness, Saturation, Tint at 50% and Contrast at 70%. Or Access the customer control Main Menu. Select Picture Quality. Select Picture Presets and then select Normal Lighting. This resets the customer controls. Put the instrument into Service Mode. Adjust the Sub Brightness (parameter 12) so the first bar on the gray scale bar is black and that each of the gray scale bars are clearly distinguishable from each other. 5

S-Correction and High Voltage Sensitivity Settings
Test Point: Adjust: Parameter #20 Parameter #48 Parameter #49 Range: 0 - 15 Range: 0 - 7 Range: 0 - 7

1. 2.

Put the instrument into Service Mode. Use the table below to set Parameter (P) to the indicated Value (V) for S-correction (parameters #20), Vertical EHT sensitivity (parameter #48) and Horizontal EHT sensitivity (parameter #49) for the different tube types.
Tube size 20 TF Orion 27 1R RCA 27 VHP RCA 32/36VHP RCA 27 TF Samsung 32TF RCA 32 TF Toshiba 36TF RCA P 20 20 20 20 20 20 20 20 V 10 10 10 10 12 12 12 12 P 48 48 48 48 48 48 48 48 V 7 7 2 7 2 2 5 2 P 49 49 49 49 49 49 49 49 V 2 2 2 2 2 2 5 2

Apply a black level test signal to the instrument. Put the instrument into Service Mode. With an oscilloscope measure the R, G and B pins on the CRT Socket and leave the scope lead on the pin with the highest voltage.

3. 4.

Peak White Adjustment
Test Point: Adjust: Figure 3. Figure 2. Adjust the Sub Tint ( parameter#14 ) so that the levels of the cyan and magenta bars are equal. 7. Adjust the Sub Color (parameter#13) and set the amplitude of the blue bar as close to the level of the white bar as possible. 8. Repeat step 6 and 7 until both conditions are met. 9. Exit the service Mode Menu. 10. Apply the same color bar signal to Video 1 Input (BY04) and select Video 1 input. 11. Put the instrument into Service Mode. 12. Adjust the Sub Tint ( parameter#14 ) so that the levels of the cyan and magenta bars are equal. 6. 1. 2. 3. Display Parameter #11 Range: 0 - 15

Comb D/A Level Adjustment (PIP Models Only)
Test Point: Adjust: 1. 2. CRT Parameter #33 Pin #11 Range: 0 - 127

4. 5. 6.

Apply a 100IRE white luma signal to BY07 (SVID input) With an oscilloscope measure and record the peak - peak level at the Blue Cathode (pin 11) on the CRT.

Adjust the cutoff pulse to 140V +/-3V using the SCREEN potentiometer located on the Focus Block on the back of the IHVT. Put the instrument into Service Mode. Check that AKB OK status (parameter 5) is equal to 3.

Focus Adjustment
Test Point: Adjust: 1. 2. Observe Display Focus Control Main PCB

4. 5.

3. . tecS ko

Tune the instrument to receive a crosshatch signal. Access the customer control Main Menu. Select Picture Quality. Select Picture Presets or press Reset on the remote control. Select Preset Normal Lighting. This resets the customer controls. Adjust the Focus control potentiometer located on the Focus Block on the IHVT for a sharp display.

Apply a 2 % Peak white pattern to the instruments RF Input. Attached TV color analyzer sensor onto the center of the Peak white pattern. Set Brightness, Saturation, Tint at 50% and Contrast at 70%. Or Access the customer control Main Menu. Select Picture Quality. Select Picture Presets and then select Normal Lighting. This resets the customer controls. Put the instrument into Service Mode. Using the second test probe to read highlight signal, adjust the peak white reading so the luminance Y, stays on the limits below. Use TV Service Menu Sub Contrast (parameter 11) to achieve a peak white reading of: 490 nits ± 5 % for 20 inch XF 255 nits ± 5 % for 27 inch VHP, 1R 255 nits ± 5 % for 27 inch XF 250 nits ± 5 % for 32 inch 220 nits ± 5 % for 32 inch XF 170 nits ± 5 % for 36 inch @70% contrast @70% contrast @70% contrast @70% contrast @70% contrast @70% contrast

Brightness Preset Adjustment
Test Point: Adjust: Display Parameter #12 Range: 0 - 33

Tint and Color Preset Adjustment
Test Point: Adjust: Figure 1. 3. 4. 5. 6. Remove the S-VID connector from BY07. Apply the same signal to BY04 Video Input 1. Put the instrument into Service Mode. Adjust the PIP Comb D/A Level (parameter #33) for the same peak - peak level as measured in step 2 +/-2%. Blue CRT Parameter #13 Parameter #14 Pin #11 Range: 0 - 33 Range: 0 - 33

NOTE: Allow the instrument to warm up for at least 15 minutes before doing the Tint and Color Preset Adjustments. This compensates for color drift in the IC as it warms to run temperature. 1. Apply a color bar signal to the instrument.

NOTE: Allow the instrument to warm up for at least 15 minutes before doing the Tint and Color Preset Adjustments. This compensates for color drift in the IC as it warms to run temperature. 1. Apply a signal pattern to the RF input with a low light area with 13 IRE. 2. Set Brightness, Saturation, Tint at 50% and Contrast at 70%. Or Access the customer control Main Menu. Select Picture Quality. Select Picture Presets and then select Normal Lighting. This resets the customer controls. 3. Attached TV color analyzer sensor onto the center of the Peak white pattern. 4. Put the instrument into Service Mode.

6 Switch off the menu to check the peak white alignment. Make fine adjustment where necessary. Alternate Method: Test Point: R,G,B pins on CRT Pins 6,8,11 Adjust: Parameter #11 Range: 0 - 15 1. 2. Apply a gray scale pattern to the instruments RF input. Set Brightness, Saturation, Tint at 50% and Contrast at 70%. Or Access the customer control Main Menu. Select Picture Quality. Select Picture Presets and then select Normal Lighting. This resets the customer controls.

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ATC113
3. 4. 5. 6. Put the instrument into Service Mode. Set the Sub Contrast (parameter 11) to mid-range 8. With an oscilloscope measure the peak - peak voltage on the R, G and B pins on the CRT Socket and leave the scope lead on the pin with the highest peak - peak. Adjust the Sub Contrast (parameter 11) so that the voltage between blanking and white level is: 32 Tube - 109V 5. Using the high light part of the image and the second test probe, adjust RG drive gain (service parameter 09) and Blue drive gain (service parameter 10) for: x = 285 ± 5 (for RF/AV/ Component input) y = 294 ± 5 (for RF/AV/ Component input) Repeat steps 4 and 5 until the color coordinates can be achieved in both low and high light intensity. 7. Switch off the service menu and check the color alignment. Make fine adjustment where necessary 8. Make fine geometry adjustment where necessary, following the procedure described in Geometry Alignment section. Component Video Adjustment: 9. Apply the low light high light pattern to the Component Video input (BY06) and repeat steps 3 to 8. Alternate Method: Test Point: Observe Display Adjust: Parameter #06 Range: 0 - 31 Parameter #07 Range: 0 - 31 Parameter #08 Range: 0 - 31 Parameter #09 Range: 0 - 127 Parameter #10 Range: 0 - 127 NOTE: Allow the instrument to warm up for at least 15 minutes before doing the Color Temperature Adjustments. This compensates for color drift in the IC as it warms to run temperature. 1. Tune the instrument to receive a gray scale stairstep signal. Range: 0 - 31 Range: 0 - 31 Range: 0 - 31 Range: 0 - 127 Range: 0 - 127 NOTE: Some generators produce a gray scale stairstep by using the color bars signal with the color burst turned off. This produces 8 bars that step from Black (7.5IRE) to White (77IRE). 2. Access the customer control Main Menu. Select item #2 Picture Quality. Select item#2 Picture Presets and then select item#2 Normal Lighting. This resets the customer controls. 3. If not previously adjusted perform the Screen Adjustment procedure. 4. Put the instrument into Service Mode. 5. Adjust RG Drive Gain (parameter#09 ) to 42 and adjust Blue Drive Gain (parameter#10 ) to 42. 6. Adjust Red cutoff (parameter#06) value to 10. 7. Adjust Green cutoff (parameter#07) and Blue cutoff (parameter#08) to produce the best gray tones in the first few steps of the gray scale. The Red cutoff (parameter#06) value may be adjusted to produce the best picture quality. 8. Adjust Green Gain (parameter#09) and Blue Gain (parameter#10) for best white level on the last steps of the gray scale. 9. The biases and drives are interactive; you must check the low light to high light gray scale tracking (black and white picture). Should any color other than gray or white be dominant in low light to high light areas the color 6.

ATC113
temperature settings have not been properly set. Repeat steps 7 and 8 until no adjustments are necessary. NOTE: Color cutoff adjustments affect the low light (dark) areas while color drive adjustments affect the high light (white) areas. 10. Adjusting biases and drives may effect the overall brightness. And, adjusting the screen control may effect the color temperature. If the screen control is adjusted after the color temperature alignment is complete; the color temperature should be checked again to insure that adjusting the screen control has not effected it. 11. Tune the instrument to a live RF channel and adjust brightness for best looking picture in normal room lighting. the PIP luma bar (black to white) is the same as the main picture luma bar ±2%.

PIP Tint & Saturation Alignments (Composite)
Test Point: Adjust: CRT Parameter #35 Parameter #36 Parameter#37 Pin 11 Range: 0 - 7 Range: 0-255 Range: 0-127

PIP Alignments (PIP Models Only) PIP Contrast & Brightness
Test Point: Adjust: 1. 2. 3. 4. 5. CRT Parameter #34 Parameter #41 Pin 11 Range: 0 - 127 Range: 0 - 31

Figure 4. 32 inch tube waveform

Apply a composite video signal with 100IRE luma bar to Video 1 at BY04. Select Video 1 as the main picture. Turn on PIP and select Video 1 as the PIP picture. Put the instrument into Service Mode. Connect an oscilloscope to the Blue Cathode on the CRT Pin 11.

Color Temperature Adjustment
Test Point: Adjust: Display Areas Parameter #06 Parameter #07 Parameter #08 Parameter #09 Parameter #10

Access the customer control Main Menu. Select item Picture Quality. Select Auto Color and then select Off. This turns Auto Color to OFF. 2. Apply a Color bar signal to Video 1 Input (BY04). 3. Select Video 1 as the main picture source. 4. Turn on PIP and select Video 1 as the PIP picture. 5. Put the instrument into Service Mode. 6. Connect an oscilloscope to the Blue Cathode on the CRT Pin 11. 7. Adjust PIP CVBS Fine tint (parameter#35) to mid-range (128). 8. Adjust the PIP CVBS Coarse Tint (parameter#35) to set the amplitudes of the PIP Cyan and Magenta bars to be as close as possible to the main picture Cyan and Magenta bars. 9. Adjust PIP CVBS Saturation level (parameter#37) so that the PIP blue bar is as close as possible to the amplitude of the main picture blue bar at the blue cathode. 10. Fine tune the Cyan and Magenta levels by adjusting PIP CVBS Fine tint (parameter#35) so that the amplitudes of the PIP Cyan and Magenta bars are as close as possible to the same level as the main picture Cyan and Magenta bars.

1.

NOTE: Allow the instrument to warm up for at least 15 minutes before doing the Color Temperature Adjustments. This compensates for color drift in the IC as it warms to run temperature. 1. Apply a pattern to the RF input that contains both a low light area (27 IRE) and high light area (75 IRE). 2. Attached a TV color analyzer sensor onto the center of the low light area. 3. Put the instrument into Service Mode. 4. Using the low light part of the image and the first test probe, adjust Red cutoff (service parameter 06), Green cutoff (service parameter 07) and Blue cutoff (service parameter 08) level for: x = 285 ± 7 (for RF/AV input) x = 285 ± 10 (for Component input) y = 294 ± 7 (for RF/AV input) y = 294 ± 10 (for Component input)

Figure 5. 6. 7. Adjust the PIP Brightness level (parameter #41) such that the black level of the PIP is in line with the black level of the main picture at the blue cathode - ±2%. Adjust the PIP Contrast level (parameter 34) such that Figure 6. 11. Because of the interaction of the Saturation adjustment to the Fine Tint alignment it may be necessary to repeat steps 7 through 10 until the PIP is correctly adjusted.

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ATC113
PIP Tint & Saturation Alignments (SVideo)
Test Point: Adjust: CRT Parameter #38 Parameter #39 Parameter #40 Pin 11 Range: 0 - 7 Range: 0-255 Range: 0-127 up the Gemstar Diagnostic Screen shown below. Adjust the horizontal centering of the Gemstar display so that the distance from the edge of the color bars to the edge of the tube is the same on both the left and right sides of the display.

ATC113

1.

Access the customer control Main Menu. Select item Picture Quality. Select Auto Color and then select Off. This turns Auto Color to OFF. 2. Apply a Color bar signal to S-Video Input (BY07). 3. Select Video 1 as the main picture source. 4. Turn on PIP and select Video 1 as the PIP picture. 5. Put the instrument into Service Mode. 6. Connect an oscilloscope to the Blue Cathode on the CRT Pin 11. 7. Adjust PIP S-Video Fine tint (parameter#39) to mid-range (128). 8. Adjust the PIP S-Video Coarse Tint (parameter#38) to set the amplitudes of the PIP Cyan and Magenta bars to be as close as possible to the main picture Cyan and Magenta bars. 9. Adjust PIP S-Video Saturation level (parameter#40) so that the PIP blue bar is as close as possible to the amplitude of the main picture blue bar at the blue cathode. 10. Fine tune the Cyan and Magenta levels by adjusting PIP S-Video Fine tint (parameter#39) so that the amplitudes of the PIP Cyan and Magenta bars are as close as possible to the same level as the main picture Cyan and Magenta bars. 11. Because of the interaction of the Saturation adjustment to the Fine Tint alignment it may be necessary to repeat steps 7 through 10 until the PIP is correctly adjusted.

Gemstar Positioning
Test Point: Adjust: Observe Display Parameter #43 Parameter #44 Parameter #45 Parameter #46 Parameter #47 Range: 73 - 185 Range: 10 - 160 Range: 5 - 80 Range: 20 - 100 Range: 0 13

NOTE: The OSD for Gemstar is not intended to need any alignment. This alignment should only be performed if the Gemstar module is repaired or replaced. 1. Apply a Color Bar pattern to the RF Input. 2. Turn on PIP and select the Color Bars as the Main and PIP picture. 3. Put the instrument into Service Mode. 4. Go to parameters #43, #44, #45, #46, and #47 and record their values before proceeding. This will allow you to reset the alignments to known values in case one is adjusted by mistake. 5. Go to parameter #43, Gemstar horizontal position. Adjust the value by one in either direction. This will bring

Gemstar Diagnostic Screen Go to parameter #44, Gemstar vertical position. Adjust the vertical centering of the Gemstar display so that the distance from the upper edge of the PIP to the top edge of the tube is the same distance as the distance from the bottom of the blue bar to the bottom edge of the display. 7. Go to parameter #46, PIP window vertical size. Adjust the value either up or down. This will bring up the Gemstar diagnostic screen shown below. Adjust the PIP window so that the bottom of the PIP window is approximately even with the bottom of the Version line of text. The larger the value the larger the PIP window. 8. Go to parameter #45, vertical PIP position, and adjust the value. The screen will revert to the Gemstar Diagnostic Screen shown on the previous page. There is a gray border around the PIP display. Adjust the value with the volume down button until the lower gray border of the PIP display is completely visible and the main picture can be seen below it. Record this value. 9. Adjust the value of the PIP vertical position with the volume up button until the entire upper gray border of the PIP display can be seen and the main picture can be seen above it. Record this value. If the difference in values is 1 or 0 go to step 6 and reduce the size of the PIP window (increase the gap). If the difference is greater than 1, adjust the value to the average of the two recorded values. 10. Go to parameter #45, horizontal PIP position, and adjust the value with the volume up button until the entire left gray border of the PIP display can be seen and the main picture can be seen on the left of it . Record this value. 11. Adjust the value of the PIP horizontal position with the volume down button until the entire right gray border of the PIP display can be seen and the main picture to the right of it. Record this value. Adjust the value to the average of the two recorded values. 6.

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V e rt_ S y n c

C C _ V ID E O

R G B _ O S D

M A IN _ T U N E R

P IP _ S Y N C _ O U T

R F S P L IT E R O U T

P IP _ V ID E O P IP _ T U N E R T D A 9 8 8 5 T P IP _ IF I/O M O D U L E A V S W IT C H C X A 2 0 8 9 S

IF

IF /V ID E O /D E F L T B 1 2 5 3 _ N

R G B _ O U T IK

T IL T

+ 5 .2 V s + 9 V E + 9 V R + 1 2 V E + 1 6 V R + 3 3 V E -1 2 V E

F B P

C R T A M P

C R T B E A M S E N S E X R P F B P

F ro n R e a r R e a r Y P rP H IF I

t V ID V ID V ID b A u d

/S -V ID /L & R 1 /S -V ID /L & R 2 /L & R io L & R

H _ O U T

V _ O U T

P r P b

C

Y

L IN E T R A N S IS T O R

F B T

F O C U S /V G 2

+ 2 3 V R E /W C O R R E C T IO N M O D U L E

E H T

T V L /R A U D

L /R A U D IN

H I F I A U D

E /W

H o r iz o n ta l D e fle c tio n V e r tic a l D e fle c tio n

B T S C D E C O D E R

W B _ A U D
P W R _ A M P X 2

V _ A M P X 2

V e rt_ S y n c

P A G E 8 -1

P A G E 8 -1