Philips PS1966C122 User Manual

Philips Consumer Electronics

Technical Service Data

Service and Quality Service Publications Dept. One Philips Drive P.O. Box 14810 Knoxville, TN 37914

Manual 7584

Model no.: PS1966C122 First Publish: 4-16-1999 Rev. Date: 5-5-1999 Print Date: 18/11/2005

Electrical Adjustments

REFER TO SAFETY GUIDELINES

SAFETY NOTICE: ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING

E8 CHASSIS SERVICE ADJUSTMENTS

REQUIRED TOOLS FOR SERVICING

Isolation Transformer Multimeter Oscilloscope High Voltage (100: 1) Oscilloscope Probe Sencore VG91 Universal Video Generator

Caution: The E8 chassis incorporates a ”hot“ ground system. Always use a separate isolation

transformer when applying power to the exposed chassis.

Service Adjustm e nt N ote s: Unless Otherwise Specified:

1. All service adjustments are ”hot“ voltagewise. For maximum safety, ensure the use of properly insulated tools.

2. Refer to the E8 Main Chassis Printed Circuit Board for location of test points and adjustable components.

3. Grid Locations (Ex.: D-3) next to the reference numbers for components refer to the Main Chassis Printed Circuit Board.

Focus Adjustment

1. Tune the set to a local or cable station.

2. Adjust the Focus Control (located on the upper part of the flyback transformer) for best picture details at high light conditions.

Degaussing the Television

1. Position the television so that the screen faces the direction it will be facing when in use.

2. Ensure the set is turned off.

3. Move a degaussing coil in a circular motion slowly around the sides and front of the set.

4. Withdraw the degaussing coil at least six feet from the television before disconnecting it from its power source.

Service Mode

Introduction

1. There are three service modes used in the E8 chassis. They are:

a. SDM - Service Default Mode b. SAM - Service Alignment Mode c. CSM - Customer Service Mode

2. The Service Default Mode (SDM) is a technical aid for the service technician. It is used for setting of options, reading error codes, and erasing error codes. This mode displays the Run Timer, Software Version, and current option settings. Service Default Mode (SDM) also establishes a fixed, repeatable setting of controls to allow measurements to be made. On screen display is kept at a minimum to reduce the cluttering of wave forms with unwanted information.

3. The Service Alignment Mode (SAM) is used to make tuning adjustments, align the white tone, adjust the picture geometry, and make sound adjustments.

4. The Customer Service Mode shows error codes and information on the TV operation settings. The servicer can instruct the customer to enter CSM by telephone and read off the information displayed. This helps the servicer to diagnose problems and failures in the TV set before making a service call.

5. When in a service mode, "SDM" (for Service Default Mode) or ”SAM“ (for Service Alignment Mode) or ”CSM“ (for Customer Service Mode) will be displayed (in green) in the top right corner of the screen.

All other On Screen Display (except highlighted items in SDM or SAM) will be in red.

6. It will be memorized in the EEPROM that the TV set is in SDM or SAM. This is necessary because the TV must show up in SDM or SAM again after an ac power interrupt.

7. When the television is in SAM or SDM, all normal features (such as volume control and direct channel access) are available.

EEPROM Replacement or Defective EEPROM

After replacing a EEPROM (or with a defective/no EEPROM) default settings will be used that enable the set to start up and that allow access to the Service Default Mode and Service Alignment Mode.

Service unfriendly modes

In the service modes, a number of modes/features are ignored since they interfere with diagnosing or repairing a set. These are ”service unfriendly modes.“ ”Ignoring“ means that the event that is triggered is not executed; the setting remains unchanged (Example: Timer OFF: 8:00 PM; the set will not switch OFF in service mode at 8:00PM, but the setting will remain). The service unfriendly modes are:

• (Sleep) timer

• Blue mute

• Auto switch off (when there is no video signal identified)

• Hotel or hospital mode

• Smart lock or blocking by V-chip

• Skipping and/or blanking of ”Not Favorite“ channels

• Automatic storing of Personal Preset settings

• Automatic user menu time-out (menu switches back or OFF automatically)

Service Default Mode (SDM)

1. The Service Default Mode (SDM), set the option codes and bytes of the set, and display the error codes (the Power LED begins blinking procedure for error code display, if errors are detected). SDM also overrides software protections. The Service Default Mode (SDM) must be used when taking voltages and waveforms.

2. To enter the Service Default Mode, press the following key sequence on the remote control transmitter:

0-6-2-5-9-6-Menu Do not allow the display to time out between entries while keying the sequence.

SDM can also be entered by pressing the Channel Down and Volume Down keys on the local

keyboard simultaneously while in SAM mode.

When Service Default Mode is entered, the text "SDM" will be displayed in the upper right corner of

the screen.

3. When Service Default Mode is entered, the Power LED will begin blinking to display any detected error codes, the set automatically tunes to Channel 3 (61.25 MHz), and service unfriendly modes are disabled. All customer controls are set to predetermined values.

4. When the unit is operating in Service Default Mode, all normal on-screen displays are suppressed and replaced by a special service display. A sample SDM display is shown below.

5. To select an option code or option byte in SDM, use the Menu Up or Menu Down keys on the remote control.

6. To change the value of an option code, use the Menu Left or Menu Right keys.

7. To change the value of an option byte, use the Menu Left or Menu Right keys, or enter the new value using the numeric keys on the remote control.

8. 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.

9. Press the Menu button on the remote control while in SDM to switch the software to a Virtual Customer Mode; the text "SDM" will still be displayed in the upper right corner of the screen. In this mode, all customer menu adjustments to the set can be made. From the Virtual Customer Mode, press the Menu button to return to the SDM display.

10. To exit the Service Default Mode and erase the error codes, turn the unit off with the Power button on the remote control, then unplug the ac cord.

11. To exit the Service Default Mode and save the error codes, unplug the ac cord to turn off the set. When the set is turned on again, the Service Default Mode will still be active.

Explanation of Display: Run Timer

The run timer counts the normal operation hours, not the standby hours. The actual value of the run timer is displayed in SDM and CSM. The run timer displays hours in hexadecimal format. This display will increment based on the amount of time the set has been on. The timer will also be incremented one hour each time the set is turned on.

Software Identification, Cluster, and Version

The software identification, cluster, and version will be shown in the service main menu display. These numbers consist of the last part of the customer identification printed on the IC package; the screen will show ”AAABBC-X.Y“. (Example: L90US1 1.2)

− AAA is the engineering project name (Ex: L90 = L9.0).

− BB is a function specification indicating specific functionality or a region (Ex: US). Processors with the

same engineering project name and function name are interchangeable, except for the languages they support.

− C is the language cluster number within the ”BB“ software version (Ex: 1 = English/Spanish/French)

− X is the main version number (Ex: 1)

− Y is the sub version number (Ex: 2)

− the main version number is updated with a major change of specification (incompatible with the

previous software version)

− the sub version number is updated with a minor change (backwards compatible with the previous

versions)

− if the main version number changes, the new version number is written in the EEPROM

− if the main version number changes, the default settings are loaded

− if the sub version number changes, the new version number is written in the EEPROM

− if the EEPROM is fresh, the software identification, version and cluster will be written to EEPROM

− Note: a new micro controller is considered to be compatible if it works instead of the old software and

the functionality is not significantly changed.

Error Buffer

Error codes are required to indicate failures in the television. For intermittent complaints, always check the error buffer. A unique error code is available for:

• activated protection (error codes 1, 2, and 3)

• failing I2C device

• general I2C error

• RAM failure (e.g. internal RAM of microprocessor (IC 7600) )

Other error codes are:

• Signal processor (IC 7250) start-up error

• EEPROM check-sum error

The last five errors, remembered in the EEPROM, are shown in the service menu. This is called the error buffer. The error that is found last is displayed on the left, except when protection (1 to 3) is active. Errors 1, 2, and 3 are often shown at the right of the error buffer display whenever they are detected.

Example 1:

Suppose the display shows: 8 – 11 – 2– 0 – 0 With 2 displayed at the right of the error buffer, high beam current protection is active.

Example 2:

Suppose the display shows: 11 – 4 – 5– 3 – 0 With 3 displayed at the right of the error buffer, vertical protection is active.

The following error codes have been defined:

Error Code Table

0 = No error 1 = X-Ray / overvoltage protection active 2 = High beam current (BCI) protection active 3 = Vertical protection active 4 = I²C error while communicating with the sound processor (IC 7803) 5 = Signal processor (IC 7250) start-up error 6 = I²C error while communicating with the signal processor IC (IC 7250) 7

= General I²C error * 8 = Internal RAM error micro controller 9 = EEPROM Configuration error (Checksum error) 10 = I²C error, EEPROM error 11 = I²C error, PLL tuner

I²C = (SCL/SDA)

Note:

General I²C error means: no I²C device is responding to the particular I²C bus.

Possible causes: SCL short circuit to GND, SDA short circuit to GND, SCL short

circuit to SDA, SDA open circuit (at IC 7600), SCL open circuit (at IC 7600)

Reading Error Codes

Error codes are displayed in the following ways:

1. By SDM display or CSM display

2. By blinking Power LED

1. If the on screen display is working, enter SDM or CSM and read the error buffer display.

2. If the on screen display is not a. Remove ac power b. Use a jumper to connect pin 0224 to pin 0228 at IC 7601 (D-3) c. Apply ac power; read the error codes (see LED Sequence List below) d. If there is no LED indication, take the following steps as needed: Power on Press 0–6–2–5–9–6–Menu on the remote control Note: Some indications take 30 seconds or longer to appear on the LED.

3. LED Sequence List: a. Wait for long LED on (1.5 seconds) b. Count the following on

Example:

Start ( 3 ) ( 2 ) Start

working, do the following:

flashes (individu al errors are separated by 1.5 seconds LED off)

4. Displayed error codes are saved by removing the ac power. Displayed error codes are erased b y pressing the power button on the remote control or local keyboard.

Option Code and Status

The following options in SDM can be identified:

Note: All options may not be available in some sets.

OPTION OP VALUES

System SY SS (This option is not used in US models) Option Byte 1 Option Byte 2 Option Byte 3 Option Byte 4 Option Byte 5 Option Byte 6 Option Byte 7

Slider Bar Value Display Animated Menu Hospital Mode HS OFF/ON Hotel Mode HT OFF/ON Demo Mode DM OFF/ON Games Mode GM OFF/ON Clock (Volatile) CK OFF/ON Child Lock CL OFF/ON V-Chip VC OFF/ON V-Chip Block Unrated VU OFF/ON Block No Rating (V-Chip) VN OFF/ON Smart Sound SS OFF/ON Smart Picture SP OFF/ON Remote Control Type RC OFF = RC0702/04 remote control / ON = All other remote controls Channel Select Time Window TW OFF = 2-second time window / ON = 5-second time window Surf SF OFF/ON Video Mute (Channel Change) VM OFF/ON Tuner Type TN OFF = Philips tuner / ON= ALPS tuner Fine Tuning FT OFF/ON AV1 XT OFF/ON AV2 2X OFF/ON Auto Cable Detect CD OFF/ON Blue Mute BM OFF/ON No Ident (Auto Standby) NI OFF/ON Noise Reduction NR OFF/ON Contrast Plus CP OFF/ON Color Temperature CT OFF/ON East-West Functions EW OFF/ON (This option is not used in US models) Video Processor Standby BS OFF/ON Video Processor Auto Startup AS OFF/ON Bass/Treble Control/Boost BT OFF/ON Incredible Surround IS OFF/ON Volume Limiter VL OFF/ON Ultra Bass UB OFF/ON Automatic Volume Leveller (AVL) LV OFF/ON SAP - Mono/Stereo DU OFF/ON Audio Out (Fixed/Variable) AO OFF/ON Sound Type ST BG/I/DK/M (Should remain on M) Sound Board SB DB = DBX/SAP (BTSC)

OB1 OB2 OB3 OB4 OB5 OB6 OB7

DP AM

Option Bytes 1 through 7 are used to set 8 options simultaneously with one byte (when the option byte is highlighted, the value can be keyed in with the numerical buttons on remote control or changed with the Menu Up/Down keys on the remote control). Values = 0 – 255 See the Chassis Feature Listing to see the values for Option Bytes 1 through 7. These values can be used to set the option package for a particular model.

OFF/ON OFF/ON

EC = BTSC stereo (No SAP) MA = Mono All

Sound Board SB DB = DBX/SAP (BTSC)

EC = BTSC stereo (No SAP) MA = Mono All MS = Bi Sonic (Mono by tuner, stereo by A/V jacks)

Option SY : System

Function: Set the multi system hardware configuration Values: SS (This option is not used in US models)

OB 1 – OB 7 : Option Byte 1 – Option Byte 7

Function: Set 8 options simultaneously with one byte

(value can be keyed in with numerical buttons on remote control or changed with the Menu Up/ Down keys on the remote control)

Values: 0 – 255

Option DP : Slider Bar Value Display

Function: Enable/disa ble slider bar value display in customer menu Values: OFF = Disable sl ider bar value di splay ON = Enable slider bar value display

Option AM : Animated Menu

Function: Enable/disable animated menu Values: OFF = Disable animated menu display ON = Enable animated menu display

Option HS : Hospital Mode

Function: Enable/disable the possibility to enter hospital mode Values: OFF = Disabled, hospital mode cannot be entered ON = Enabled, hospital mode can be entered

Option HT : Hotel Mode

Function: Enable/disable the possibility to enter hotel mode Values: OFF = Disabled, hotel mode cannot be entered ON = Enabled, hotel mode can be entered

Option DM : Demo Mode

Function: Enable/disable the possibility to enter demo mode Values: OFF = Disabled, demo mode is not active ON = Enabled, demo mode is active

Option GM : Games Mode

Function: Enable/disable games function Values: OFF = Disabled, G ames command is ignored ON = Enabled, Games command is processed

Option CK : Clock (Volatile)

Function: Enable/disable clock function Values: OFF = Disabled, clock menu not available ON = Enabled, clock menu available

Option CL : Child Lock

Function: Enable/disable child lock function Values: OFF = Disabled, child lock menu not availabl e ON = Enabled, child lock menu available

Option VC : V-Chip

Function: Enable/disable v-chip function (customer menu item Smartlock) Values: OFF = Disabled, v-chip menu (customer menu item Smartlock) not available ON = Enabled, v-chip menu (customer menu item Smartlock) available

Option VU : V-Chip Block Unrated

Function: Enable/disable V-Chip block unrated (in Smartlock menu) Values: OFF = Disabled, V-Chip block unrated (in Smartlock menu) not available ON = Enabled, V-Chip block unrated (in Smartlock menu) available

Option VN : Block No Rating (V-Chip)

Function: Enable/disable block no rating V-Chip (in Smartlock menu)

Option SS : Smart Sound

Function: Enable/disable smart sound function Values: OFF = Disabled, Smart Sound command is ignored ON = Enabled, Smart Sound command is processed

Option SP : Smart Picture

Function: Enable/disable smart picture function Values: OFF = Disabled, Smart Picture command is ignored ON = Enabled, Smart Picture command is processed

Option RC : Remote Control Type

Function: Choose the type of remote control to be used Values: OFF = RC0702/04 remote control ON = All other remote controls Note: If changed when using the RC0702/04, this option can only be returned to the original setting

by option byte correction.

Option TW : Channel Select Time Window

Function: Select time window for channel selection Values: OFF = 2-second time window for channel selection ON = 5-second time window for channel selection

Option SF : Surf

Function: Enable/disable the possibility to enter surf mode Values: OFF = Disabled, customer menu item Surf not available and A/CH command alternates

channels

ON = Enabled, customer menu item Surf available and A/CH command surfs or

alternates channels

Option VM : Video Mute (Channel Change)

Function: Enable/disable video mute during channel change Values: OFF = Disabled, no video mute during channel change ON = Enabled, video muted during channel change

Option TN : Tuner Type

Function: Choose the tuner type that is configured in the hardware Values: OFF = Philips tuner (A Philips tuner will have the Philips name embossed on the side) ON = ALPS tuner (An ALPS tuner will not

have the Philips name embossed on the side)

Option FT : Fine Tuning

Function: Enable/disable fine tuning Values: OFF = Customer menu item fine tuning disabled ON = Customer menu item fine tuning enabled

Option XT : AV1

Function: Enable/disable external input source 1 (Ext 1) Values: OFF = Disabled, external input source 1 (Ext 1) not available ON = Enabled, external input source 1 (Ext 1) available

Option 2X : AV2

Function: Enable/disable external input source 2 (Ext 2) Values: OFF = Disabled, external input source 2 (Ext 2) not available ON = Enabled, external input source 2 (Ext 2) available

Option CD : Auto Cable Detect

Function: Enable/disable automatic detection of Cable/Broadcast during autostore. Values: OFF = Disabled, autostore uses the selected Cable/Broadcast setting ON = Enabled, autostore will detect and set Cable/Broadcast mode

Option BM : Blue Mute

Function: Enable/disable blue mute when no television station signal is present Values: OFF = Disabled, no blue mute when no television station signal is present ON = Enabled, blue mute active when no television station signal is present

Option NI : No Ident (Auto Standby)

Function: Enable/disable automatic switch to standby after 10 minutes when no television station

signal is present Values: OFF = Disabled, no automatic switch to standby ON = Enabled, set switches to standby after 10 minutes when no television station signal

is present

Option NR : Noise Reduction

Function: Enable/disable noise reduction function Values: OFF = Disabled, customer menu item Noise Reduction not available ON = Enabled, customer menu item Noise Reduction available

Option CP : Contrast Plus

Function: Enable/disable contrast plus function Values: OFF = Disabled, customer menu item Contrast Plus not available ON = Enabled, customer menu item Contrast Plus available

Option CT : Color Temperature

Function: Enable/disable color temperature function Values: OFF = Disabled, customer menu item Color Temperature not available ON = Enabled, customer menu item Color Temperature available

Option EW : East-West Functions

Function: Enable/disable east-west control function (This option is not used in US models) Values: OFF = Disabled, east-west alignment not available in SAM (EWW, EWP, EWC, EWT) ON = Enabled, east-west alignment available in SAM (EWW, EWP, EWC, EWT)

Option BS : Video Processor Standby

Function: Enable/disable video processor standby Values: OFF = Disabled, video processor standby is not active ON = Enabled, video processor standby is active

Option AS : Video Processor Auto Startup

Function: Enable/disable video processor auto-startup Values: OFF = Enabled, video processor is in auto-startup mode ON = Disabled, video processor is switched on under control of microcontroller

Option BT : Bass/Treble Control/Boost

Function: Enable/disable bass and treble function Values: OFF = Disabled, customer menu items Bass and Treble not available ON = Enabled, customer menu items Bass and Treble available

Option IS : Incredible Surround

Function: Enable/disable incredible surround function Values: OFF = Disabled, incredible surround function not available ON = Enabled, incredible surround function available

Option VL : Volume limiter

Function: Enable/disable volume limiter Values: OFF = Disabled, customer menu item Volume Limiter not available ON = Enabled, customer menu item Volume Limiter available

Option UB : Ultra Bass

Function: Enable/disable ultra bass function Values: OFF = Disabled, ultra bass function not available

ON = Enabled, ultra bass function available

Option LV : Automatic Volume Leveller (AVL)

Function: Enable/disable automatic volume leveller function Values: OFF = Disabled, customer menu item AVL not available ON = Enabled, customer menu item AVL available

Option DU : SAP

Function: Set SAP configuration (sets with DBX stereo system only) Values: OFF = Disabled, stereo/SAP not available ON = Enabled, stereo/SAP available

Option AO : Audio Out (Fixed/Variable)

Function: Set audio output type (where present) Values: OFF = Fixed audio out ON = Variable audio out (always on)

Option ST : Sound Type

Function: Set the sound type Values: BG PAL system

I PAL system

DK PAL system M Default for USA

Option SB : Sound Board

Function: Set the sound board configuration Values: DB = DBX/SAP (BTSC)

EC = BTSC stereo (No SAP)

MA = Mono All

MS = BiSonic (Mono from tuner, Stereo from A/V jacks)

Service Alignment Mode (SAM)

1. The Service Alignment Mode (SAM) is used to make tuning adjustments, align the white tone, adjust the picture geometry, and make sound adjustments.

2. To enter the Service Alignment Mode (SAM), press the following key sequence o n the remo te co ntrol transmitter: 0-6-2-5-9-6-Status

Do not allow the display to time out between entries while keying the sequence.

SAM can also be entered by pressing the Channel Down and Volume Down keys o n the local keyboard simultaneously while in SDM mode. When Service Alignment Mode is entered, the text "SAM" will be displayed in the top right corner of the screen.

3. When Service Alignment Mode is entered, service unfriendly modes are disabled. The following volatile SAM item values are set:

♦ AKB = 0 ♦ VSD = 0 ♦ AFW = 275 kHz ♦ SBL = 0

4. Wh en the unit is operating in Service Alignment Mode, a ll normal on-screen displays are suppressed

and replaced by a special service display. The first screen seen up on entering SAM is the ”top level SAM menu.“ The service technician must return to the top level SAM menu before exiting with a power-off command. A sample SAM top level menu display is shown below.

Explanation of top level SAM menu display:

The Software Identification, Cluster, and Version are explained in the Service Default Mode section under ”Explanation of Display.“ The Menu Items and Sub Menus are explained below. Note: The ”Audio“ sub menu will not be seen on screen when Service Alignment Mode is

first entered. Use the Menu Up and Menu Down buttons on the re mote control to view all menu items and sub menu choices.

5. To select a menu item or a sub men u in SAM, use the Menu Up or Menu Down keys on the remote control to highlight the item or menu you wish to adjust.

6. To c hange the value of a highlighted SAM menu item (AKB or VSD), use the Menu Left or Menu Right keys on the remote control.

7. To enter a highlighted SAM sub menu, use the Menu Left or Menu Right keys.

After entering the sub menu, use the Menu Up or Menu Down to select an item within the sub menu. Use the Menu Left or Menu Right keys to change the value of the selected item.

Press the Menu button to return to the top level SAM menu.

8. Press the Menu button on the remote control while in SAM to switch the software to a Virtual Customer Mode; the text "SAM" will still be displayed in the upper righ t corner of the screen. In this mode, all customer menu adjustments to the set can be made. From the Virtual Customer Mode, press the Menu button to return to the SAM Menu.

9. Press the Status button on the remote control to toggle the OSD (except ”SAM“) ON and OFF.

10. To exit the Service Alignment Mode, turn the set off with the Power button on the remote control. To turn off the set without exiting SAM (or erasing any stored error codes), unplug the ac cord. When the set is powered on again, the Service Alignment Mode will still be active. Note: When SAM is exited or a power interrupt occurs, the volatile SAM items AKB, VSD, AFW, and

SBL will be reset to their original values.

Main Menu

The SAM main menu contains the following items:

− AKB

− VSD

− Tuner sub menu

− White Tone sub menu

− Geometry sub menu

− Audio sub menu (on stereo chassis)

Menu: MAIN Values Remarks AKB Black current loop

(Auto Kine Bias)

VSD Vertical scan

disable TUNER WHITE TONE GEOMETRY AUDIO

OFF/ON (0/1) OFF/ON (0/1)

> > > >

Available onl y on st ere o chassis

Tuner sub menu

The tuner sub menu contains the following items:

− IF-PLL

− AFW

− AGC

− YD

− CL

− AFA and AFB

The items AFA and AFB cannot be selected, they are for monitoring purposes only. The item values are stored in EEPROM if this sub menu is left. A sample display of the Tuner sub menu is shown below.

Tuner Adjustment:

Sub Menu: TUNER Values Remarks IF-PLL IF-PLL alignment 0 – 127 This adjustment is auto-aligned (no action required) AFW AFC window 125/275 kHz Always set to 275 kHz AGC AGC takeover point 0 – 63 See below YD Y-delay adjustment 0 – 15 Always set to 12 (no effect) CL Cathode drive level 0 – 7 Always set to 4 AFA 0 / 1 read only, not accessible AFB 0 / 1 read only, not accessible

AGC Takeover Point (AGC):

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the Tuner sub menu.

3. Use the menu left/right keys to enter the Tuner sub menu.

4. In the Tuner sub menu, use the Menu Up/Down keys to high light AGC.

5. Use the Menu Right key to raise the value of AGC until snow appears in the picture.

6. Then use the Menu Left/Right keys to reduce AGC value until the snow disappears. a. AGC values between 10 and 20 are nominal. b. Single digit AGC values may cause overload.

7. Upon completion of Tuner adjustment, press the Menu button to return to the top level SAM menu.

White Tone sub menu

The white tone sub menu contains the following items:

− Normal Red

− Normal Green

− Normal Blue

− Delta Cool Red

− Delta Cool Green

− Delta Cool Blue

− Delta Warm Red

− Delta Warm Green

− Delta Warm Blue

Note: Delta values are only used in models with the item ”Color Temperature“ in the customer

menu.

OSD is kept to a minimum in this menu, in order to make white tone alignment possible. The item values are stored in EEPROM if this sub menu is left. The Contrast Plus feature (black stretch) is set to OFF when the White Tone sub menu is entered. A sample display of the White Tone sub menu is shown below.

Sub Menu: WHITE TONE Value Range Remarks NORMAL Starting Values:

NORMAL RED 0 – 63 32 NORMAL GREEN 0 – 63 23 NORMAL BLUE 0 – 63 25

COOL

DELTA COOL RED 0 Delta values are a change of the normal values.

DELTA COOL GREEN

DELTA COOL BLUE

WARM

DELTA WARM RED

DELTA WARM GREEN

DELTA WARM BLUE

Default Value

These start at the default values, and are set to achieve cool and warm steps of color temperature in the customer menu. Standard factory settings are given as the default values.

+1 +7

-4

-12

White Tone Adjustments:

Note: The following procedure was performed with a Sencore VG91 Universal Video Genera tor providing

grey scale bars.

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the White Tone sub menu.

3. Use the Menu Left/Right keys to enter the White Tone sub menu.

4. Set the VG91 Generator as follows: STD TV Ch. 3, RF-IF Range set to HI, RF-IF Level set to NORMAL (1), Video Pattern = Raster, R-G-B raster controls OFF.

5. Connect the RF output of the generator to the Television Antenna Input, a nd adjus t the VG91 level to remove any snow from the raster.

6. Turn off chroma at generator and leave grey scale bars.

7. From the White Tone su b-menu, use the Menu Up/Down keys to select Normal Red, Normal Green, or Normal Blue. Then use the Menu Left/Right keys to adjust the values to obtain the best white balance.

8. A reasonable starting point for NORMAL is:

Normal Red=37, Normal Green=33 , Normal Blue=35

9. After NORMAL is set, use the same method to set DELTA COOL and DELTA WARM as offsets. A reasonable starting point for DELTA COOL is: Delta Cool Red=0, Delta Cool Green=+1, Delta Cool Blue=+3 A reasonable starting point for DELTA WARM is: Delta Warm Red=0, Delta Warm Green=-6, Delta Warm Blue=-5

10. After the values are set, or if no changes are required, press Menu to return to the top level SAM menu.

Geometry sub menu

OSD is kept to a minimum in this sub menu in order to make picture geometry adjustments possible. The item values are stored in EEPROM if this sub menu is left. The value of item Service Blanking (SBL) is not stored in EEPROM, and it is set to OFF when the geometry sub menu is exited. A sample display of the Geometry sub menu is shown below.

The picture geometry sub menu contains the following items:

Sub Menu:

VAM VSL Vertical slope 0 – 63 SBL Service blanking ON/OFF HSH Horizontal shift 0 – 63 EWW E-W width 0 – 63 Not used EWP E-W parabola/width 0 – 63 Not used EWT E-W trapezium 0 – 63 Not used EWC E-W corner parabola 0 – 63 Not used H60 Delta HSH for 60 Hz 0 – 15 Not used V60 Delta VAM for 60 Hz 0 – 15 Not used VSC Vertical S-Correction 0 – 63 VSH Vertical shift 0 – 63

GEOMETRY

Vertical amplitude

Values

0 – 63

Remarks

Geometry Adjustments:

Notes:

1. The following Geometry adjustments were performed with a Sencore VG91 Universal Video Generator.

2. Set the VG91 Generator as follows: STD TV Ch. 3, RF-IF Range set to HI, RF-IF Level set to NORMAL (1), Video Pattern = Raster, R-G-B raster controls OFF, crosshatch or center cross pattern as required.

3. Connect the RF output of the generator to the Television Antenna Input, a nd adjus t the VG91 level to remove any snow from the raster.

Vertical Shift (VSH):

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the Geometry sub menu.

3. Use the Menu Left/Right keys to enter the Geometry sub menu.

4. In the Geometry sub-menu, use the Menu Up/Down buttons to select VAM.

5. Input a center cross pattern to the antenna/cable input terminal.

6. Using the Menu Left/Right keys, adjust VSH so that the horizontal bar is properly centered, top to bottom.

7. If other Geometry adjustments are needed, proceed to the necessary adjustment using the Menu Up/Down buttons.

8. Upon completion of Geometry adjustments, press the Menu button to return to the top level SAM menu.

Vertical Amplitude (VAM):

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the Geometry sub menu.

3. Use the Menu Left/Right keys to enter the Geometry sub menu.

4. In the Geometry sub-menu, use the Menu Up/Down buttons to select VAM.

5. Input a crosshatch pattern to the antenna/cable input terminal.

6. Using the Menu Left button, reduce the value so that the picture does not fill the entire screen.

7. Use the Menu Up/Do wn keys to select VSH (Vertical Shift) from the Geometry sub-menu a nd, using the Menu Left/Right keys, center the picture on the screen, top to bottom.

8. Using the cursor up/down keys, select VAM from the Geometry sub-menu, and use the Menu Right key to increase the value to obtain a slight overscan.

9. If other Geometry adjustments are needed, proceed to the necessary adjustment using the Menu Up/Down buttons.

10. Upon completion of Geometry adjustments, press the Menu button to return to the top level SAM menu.

Horizontal Shift (HSH):

Note: This adjustment centers the video on the raster. It does not move the raster.

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the Geometry sub menu.

3. Use the Menu Left/Right keys to enter the Geometry sub menu.

4. In the Geometry sub-menu, use the Menu Up/Down buttons to select HSH.

5. Input a center cross pattern to the antenna/cable input terminal.

6. Using the Menu Left/Right keys, adjust HSH so that the vertical bar is properly centered, left to right.

7. If other Geometry adjustments are needed, proceed to the necessary adjustment using the Menu Up/Down buttons.

8. Upon completion of Geometry adjustments, press the Menu button to return to the top level SAM menu.

Vertical Slope (VSL):

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the Geometry sub menu.

3. Use the Menu Left/Right keys to enter the Geometry sub menu.

4. In the Geometry sub-menu, use the Menu Up/Down buttons to select VSL.

5. Input a crosshatch pattern to the antenna/cable input terminal.

6. Using the Menu Left/Right keys, adjust VSL so that the squares at the bottom of the screen are equa l in size to the squares at the top of the screen.

7. If other Geometry adjustments are needed, proceed to the necessary adjustment using the Menu Up/Down buttons.

8. Upon completion of Geometry adjustments, press the Menu button to return to the top level SAM menu.

Vertical S-Correction (VSC):

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the Geometry sub menu.

3. Use the Menu Left/Right keys to enter the Geometry sub menu.

4. In the Geometry sub-menu, use the Menu Up/Down buttons to select VSC.

5. Input a crosshatch pattern to the antenna/cable input terminal.

6. Using the Menu Left/Right keys, adjust VSC so that the squares at the center of the screen are equal in size to the squares at the top and bottom of the screen.

7. If other Geometry adjustments are needed, proceed to the necessary adjustment using the Menu

Up/Down buttons.

8. Upon completion of Geometry adjustments, press the Menu button to return to the top level SAM menu.

Service Blanking (SBL):

Service Blanking provides a straight cutoff line in the center of the raster. It is useful when centering the

raster. It can also be used in adjusting the yoke and setting vertical size and linearity.

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the Geometry sub menu.

3. Use the Menu Left/Right keys to enter the Geometry sub menu.

4. In the Geometry sub-menu, use the Menu Up/Down buttons to select SBL.

5. Use the Menu Left/Right keys to toggle SBL ON or OFF.

6. With SBL on, VSH can be used to center the raster on the fiduciary marks (th e small notches in the phosphor on the right and left edge of the CRT). These are absolute center.

7. If other Geometry adjustments are needed, proceed to the necessary adjustment using the Menu Up/Down buttons.

8. Upon completion of Geometry adjustments, press the Menu button to return to the top level SAM menu.

Delta HSH for 60Hz (H60):

Note: This adjustment should not be changed from the factory preset value (10).

Delta VAM for 60Hz (V60):

Note: This adjustment should not be changed from the factory preset value (5).

Audio sub menu

The audio sub menu item values are stored in EEPROM if this sub menu is left. A sample display of the Audio sub menu is shown below.

The Audio sub menu contains the following item on stereo chassis:

Sub Menu: AUDIO Values Remarks AT Attack time at AVL 1 – 4 Normal setting is 4.

Audio Adjustment:

Attack Time at AVL (AT):

1. 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.

2. From the top level SAM menu, use the Menu Up/Down keys to highlight the Audio sub menu.

3. Use the Menu Left/Right keys to enter the Audio sub menu.

4. Use the Menu Left/Right keys to adjust the value of AT.

5. Set the volume of AT to 4.

6. Upon completion of Audio adjustment, press the Menu button to return to the top level SAM menu.

Convergence and Purity Adjustments

Notes:

1. The following adjustments were performed with a Sencore VG91 Universal Video Generator.

2. Set the VG91 Generator as follows: STD TV Ch. 3, RF-IF Range set to HI, RF-IF Level set to NORMAL (1), Video Pattern = Raster, R-G-B raster controls OFF, Mode Switch set to L+R, Audio Frequency set to 300Hz, and 0 Pilot (max. CCW).

3. Connect the RF output of the generator to the Television Antenna Input, a nd adjus t the VG91 level to remove any snow from the raster.

Pre-Convergence Procedure

Note: The degaussing procedure should be performed prior to this adjustment.

1. Place the multi-pole Purity and Convergence Assembly with the 2-Y pole purity rings directly in the gap between the G2 and G3 (focus) grids as shown in the Convergence and Purity Assembly.

(Display the Convergence and Purity Assembly)

2. Enter Service Alignment Mode (refer to Service Alignment Mode section).

3. Apply a center cross or crosshatch pattern to the antenna/cable input terminal.

4. Select the White Tone su b-menu by pressing the Menu Up/Down keys on the remote control so that White Tone is highlighted.

5. Use the Menu Left/Right keys to enter the White Tone sub-menu.

6. Use Menu Up/Down keys to toggle between the options. Be sure to record the values of all options (Normal Red/Green/Blue, Delta Cool Red/Green/Blue, and Delta Warm Red/Green/Blue).

7. Use the Menu Up/Down keys to select Normal Green, and use the Menu Left key to set Normal Green to minimum.

8. Loosen the yoke clamp screw, pull the yoke back, and remove the three yoke wedges.

9. Slide the yoke all the way forward so that it rests against the bell of the CRT.

10 Tighten the yoke clamp screw so that the yoke does not drop away from the bell of the CRT.

11. Slowly spread, and if necessary, rotate the 2-Y pole pu rity rings so that the red a nd blue lines are at least parallel and preferably coincide at the 6:00 and 12:00 positions as shown in the following linked graphic "2Y Spread and 2X Rotate".

12. Proceed to the Color Purity Adjustment.

(Display the Convergence and Purity Assembly) (Display the 2Y Spread and 2X Rotate Graphic)

Color Purity Adjustment

1. Connect a solid white pattern signal to the antenna/cable input terminal.

2. Use the Menu Up/Down keys to select Normal Blue, and use the Menu Left key to set Normal Blue to minimum.

3. Use the Menu Up/Do wn keys to select Normal Red, and us e the Menu Right key to set Normal Re d to maximum.

4. Slowly spread the 2-X pole purity rings to center the red portion of the screen, leaving the same amount of green on one side of the screen as blue on the other side.

5. Tighten the yoke clamp screw slightly so that the yoke may be moved with some friction.

6. Proceed to the Static Center Convergence Adjustment.

Static Center Convergence Adjustment

1. Apply a center cross or crosshatch pattern to the antenna/cable input terminal and observe the screen to ensure that the yoke is not tilted. If necessary, rotate the yoke to obtain a level raster.

2. Use the Menu Up/Down keys to select Normal Blue, and use the Menu Right key to set Normal Blue to maximum.

3. Slowly spread, and if necessary, rotate the 4-pole magnetic rings to converge red and blue lines at the center of the screen.

4. Use the Menu Up/Down keys to select Normal Green, and use the Menu Right key to set Normal Green to maximum.

7. Slowly spread, and if necessary, rotate the 6-pole magnetic rings to converge red/blue on green lines at the center of the screen.

8. Repeat steps three and five for optimum performance.

9. Proceed to the Dynamic Edge Convergence Adjustment.

(Display the Convergence and Purity Assembly)

Dynamic Edge Convergence Adjustment

(Display Figures 3a, 3b, 3c, 4a, 4b, & 4c of Wedge Placement Graphic)

Note: To secure the correct position of the deflection yoke, three rubber wedges are used. They are

ultimately to be placed as shown in Figure 3c or Figure 4c.

1. Apply a crosshatch pattern to the antenna/cable input terminal.

2. Use the Menu Up/Down keys to select Normal Green, and use the Menu Left key to set Normal Green to minimum.

3. Tilt the yoke up and down to converge the red and blue ve rtical lines at the 6:00 and 12:00 positions and the red and blue horizontal lines at the 3:00 and 9:00 positions (refer to Figure 5). Wh en the correct position has been found, place a rubber wedge b etween the yoke and the CRT. If the yoke is tilted up, place wedge one as shown in Figure 3a; if it is tilted down, place wedge o ne as shown in Figure 4a.

4. Tilt the yoke to the left and right to find the point of best possible convergence of the red and blue lines at the edges, top and bottom of the scree n as shown in Figure 6. When the correct position is located, place wedges two and three as shown in Figure 3b or Figure 4b.

5. Remove wedge one and place it in the final position as shown in Figure 3c or Figure 4c.

6. Use the Menu Up/Down keys to select Normal Green, and use the Menu Right key to set Normal Green to maximum.

7. Proceed to the White Balance Setup.

(Display Figures 3a, 3b, 3c, 4a, 4b, & 4c of Wedge Placement Graphic) (Display Figures 5 &6 of Yoke Tilt Graphic)

Master Screen (VG2)/ White Balance Setup:

1. With the set OFF, rotate VG2 (located on the lower part of the flyback transformer) counter clockwise.

2. Use the Power Button (on the remote control or the local keyb oard) to turn the set ON, without a signal, and rotate VG2 clockwise until snow is visible.

3. Enter Service Alignment Mode (refer to Service Alignment Mode section).

4. Enter the Virtual Customer Menu by pressing the Menu button on the remote and set brightness and picture to 31 and color to 0.

5. Apply an NTSC color bar signal to the antenna/cable input terminal and tune to the active channel.

6. Connect an oscilloscope, 20V per division and 10 uSec time base, to pin 6 of the CRT Socket. Observe the stairstep pattern while adjusting VG2.

Hint: Counter clockwise adjustment will compress bottom of stairstep pattern. Clockwise adjustment will

compress top of stairstep pattern.

7. Adjust VG2 midway between top and bottom compression.

8. Proceed to White-Tone Adjustments under White Tone sub-menu in the Service Alignment Mode section to complete White Balance Setup.

Customer Service Mode (CSM)

1. The Customer Service Mode (CSM) is used to retrieve data on the TV operation settings and stored

error codes.

2. To enter the Customer Service Mode, press and hold the Mute b utton on the remote control and any

key on the local keyboard (except ”Power“) for more than 4 seconds. When the set is in Customer Service Mode, the text "CSM" is displayed in the top right corner of the screen.

3. To use this system, the customer is instructed to enter CSM and read off the display that appears.

This information is useful to gain insights into failures before traveling to the customer's home.

4. This information can also be used to avoid nuisance trips to the home when the problem is an

operational error (example: Closed Caption is on or set is in Hospital Mode).

5. When entering CSM, all disruptive functions are turned off, and service unfriendly modes are ignore d.

While CSM is active, no changes can be made in settings or function s. When CSM is exited, the TV returns to all prior operational settings.

6. To exit CSM, press any key (on the remote control or local keyboard) except ”Channel Up“ or

”Channel Down.“ To exit CSM and return the set to normal operation mode, press any key on the local keyboard or the remote control except Channel Up, Channel Down, or Power. To exit CSM and turn the set off, press the Power button on either the TV set or the remote control.

7. A sample CSM display is shown below.

Explanation of CSM Display Screen

The following information is displayed on screen:

• Text ”CSM“ on the first line

• Line number for every line (to make CSM language independent)

• To view multiple CSM pages (such as lines 8 and 9), use the Channel Up or Channel Down keys

• For more information on lines 1, 2, and 3, see SDM section ”Explanation of Display“

• Line 1 displays the run timer and the software identification, cluster, and version

• Line 2 displays the error buffer contents (the word ”error“ is not used on this screen, instead ”codes“ is

used)

• Line 3 displays the option code information

• Line 4 displays SYS: (This is not used)

• Lines 5 through 8 display information on active service unfriendly modes

• Line 5 displays the text ”NOT TUNED“ if no television station is tuned

• Line 6 displays the text ”TIMER“ if the sleep timer or ”on“ timer is active

• Line 7 displays the text ”LOCKED“ if one or more channels or presets is locked via child lock

• Line 8 displays the text ”HOSPITAL“ if hospital mode is active, or ”HOTEL“ if hotel mode is active

• If the volume limiter is active, line 9 displays the text ”VOL LIM“ and the set value of the volume limiter.

If the volume limiter is inactive, the displayed value will be 255 (the maximum volume allowed).

CSM Flow Chart

Normal operation mode

gs (

Press "MUTE" button (RC) and

(except "POWER") for more than 4 seconds

key on the local keyboard

Store current picture, sound and feature settings (for later retrieval)

Set pre-defined picture, sound and feature settings

Ignore service unfriendly options

Display CSM information screen

"Channel up" (RC or local keyboard)

Exit CSM

Restore picture, sound and feature settin stored during entry)

that were

Other key

"Channel down" (RC or local keyboard)

“POWER” (RC or local keyboard)

To next CSM pageTo previous CSM page

Off (Exit CSM): when the set is switched on,

icture, sound and feature

settings (that were stored during entry) are restored

Chassis to Parts Usage Matrix

(Display Part Usage Matrix)

CHASSIS FEATURE LISTINGS

(Display USA/Canadian Chissis Listings) (Display Latin American Chassis Listings)

+ 55 hidden pages