Proper
service and repair is important to the safe, reliable operation of all Philips equipment.
The service procedures recommended and described are effective methods of
performing service operations. Some of these service operations require the use
of tools specially designed for the purpose. The special tools should be used.
E8 chassis introduction
The
E8 series chassis is the Small Screen TV chassis produced by Philips Consumer
Electronics Company for the 1999-2000 model year. The E8 is used with 13, 19,
and 20 inch CRT’s. The E8 Tuning System features a 181 channel Tuning System
with On-Screen Display. The Tuning System uses two IC’s mounted on the main
chassis. It consists of a Microcomputer IC and Memory IC. The Microcomputer
communicates with the Memory IC, the Customer Keyboard, the Remote Receiver,
the U/V Tuner, the TV Signal Processor, the Stereo Decoder (optional), and the
Power On-Off circuitry. The Memory IC retains the settings for favourite stations, customer control settings, feature settings, and factory setup data.
The
chassis features a Very Large Scale Integration (VLSI) IC for TV Signal Processing.
This IC performs Video IF, Sound IF, AFT/AGC control, Horizontal Signal
Processing, Vertical Signal Processing, Horizontal/Vertical Synchronisation,
Chroma/Luminance Processing, and Video Switching between internal and external
inputs. On-Screen Graphics from the Microcomputer are placed on the main signal
within the TV Signal Processor. Automatic Volume Level (AVL) from the
Microcomputer is sent to the TV Signal
Processor (Mono Sets) and to the Stereo Module (DBX Stereo Sets via the I2C
bus). AVL for Normal Stereo is switched by Pin 9 of the Microcomputer, 7600.
The Mono version has a 1 watt audio amplifier. The Normal Stereo version has a
2x1 watt amplifier. The DBX Stereo version has a 2x3 watt amplifier. Latin
American versions of this chassis may have a 2 or 3 watt Mono amplifier.
The
E8 chassis features a Switching Mode Power Supply. A ”HOT“ ground reference is
used in the primary side of the power supply. ”COLD“ (signal) ground is used
from the secondary of the power supply and throughout the rest of the chassis.
An isolation transformer is required when doing service on any chassis.
Power Supply Voltages
Chassis service adjustments
1. The
E8 chassis incorporates a ”hot“ ground system. Always use a separate isolation
transformer when applying power to the exposed chassis.
All
service adjustments are ”hot“ voltage wise. 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 fly-back
transformer) for best picture details at high light conditions.
Degassing 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 degassing coil in a circular motion slowly around the sides and
front of the set.
4. Withdraw the degassing coil at least six feet from the television before
disconnecting it from its power source.
Service Mode
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 service person 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 memorised 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 wave forms.
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.
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 working, do the following:
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 flashes (individual 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 by pressing the power button on the remote control or local
keyboard.
Option Code and Status
The
following options in SDM can be identified. Note that not all options may be
available in some sets.
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/disable slider bar value display in customer menu
|
|
|
Values:
|
OFF
= Disable slider bar value display
|
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, Games 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 available
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)
|
Values:
|
OFF
= Disabled, block no rating V-Chip (in Smartlock menu) not available
ON = Enabled, block no rating V-Chip (in Smartlock menu) available
|
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
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.
SAM can also be entered by pressing the Channel Down and Volume Down keys on
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
VSD
AFW
SBL
|
=
0
= 0
= 275 kHz
= 0
|
4.
When the unit is operating in Service Alignment Mode, all normal on-screen
displays are suppressed and replaced by a special service display. The first
screen seen upon 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.
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 remote
control to view all menu items and sub menu choices.
5.
To select a menu item or a sub menu 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 change 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 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 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.
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 highlight 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.
White Tone Adjustments
Note: The following procedure was performed with a Sencore VG91 Universal Video
Generator 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, and
adjust 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 sub-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.
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/Down keys to select VSH (Vertical Shift) from the Geometry
sub-menu and, 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.
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
(the 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.
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 keyboard) 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 10uSec 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 button 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 ignored. While CSM is active, no changes can be made in
settings or functions. 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.
Explanation of CSM Display Screen
The following information is displayed on screen:
ext
”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).
