[TechAssist] Re: fix.Magnavox 60P8241,PTV915 proj. shuts off after 1min,getting worse]]
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 10 Dec 2003 10:46:23 -0500
Here you go:
A10 PTV ADJUSTMENTS
MANUAL 7615
Service Modes & Error Messages
The following topics are covered:
· Test points
· Service Modes
· Error code buffer and error codes
· The "blinking LED" procedure
· Trouble shooting tips
· Customer Service Mode
Measurements should be performed under the following conditions:
Video: color bar signal
Audio: 3kHz left, 1kHz right
Note: The measurements at the following test points were taken using a 100:1
probe:
· I142, LSB Panel
· I220, LSB Panel
Service Default Mode (SDM)
Introduction
The Service Default Mode (SDM) is a technical aid for the service
technician. The Service Default Mode (SDM) establishes fixed, repeatable
settings of customer controls, which allow consistent measurements to be
made. The SDM also initiates the blinking LED procedure and, if necessary,
overrides the 5V protection. This mode also allows the operating hours of
the set, the software version, and error codes to be read.
The SDM places the set in the following pre-defined conditions:
· Tuning frequency set to Channel 3.
· Volume level set to 25% (of the maximum volume level).
· Other picture and sound settings set to 50% (mid-range).
The following functions are turned off in SDM (and after leaving SDM):
· Timer
· Sleep timer
The following functions are disabled during SDM (and enabled after leaving
SDM):
· Parental lock
All other controls operate normally.
Entering Service Default Mode
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.
Upon entry into the Service Default Mode, the letters "SDM" will be
displayed at the upper right corner of the screen.
Display SDM Screen
Special SDM functions
Access to normal user menu
Pressing the "MENU" button on the remote control switches between the SDM
and the normal user menus (with the SDM mode still active in the background)
Run timer, software identification, and error buffer
Press the Index or 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.
Access to SAM
To access the Service Alignment Mode while press the "VOLUME +" and
"VOLUME -" buttons on the local keyboard simultaneously for at least 4
seconds.
The Blinking LED Procedure
The contents of the error buffer can also be made visible through the
"blinking LED" procedure. This is especially useful when there is no
picture.
NOTE: If errors 1, 2, 3, or 4 occur the LED ALWAYS blinks indicating the
last error which occurred, even if the set is NOT in service mode.
· When the SDM is entered, the LED will blink the number of times equal to
the value of the error code.
Upon entry into the SDM, the LED will blink the contents of the
error-buffer.
Error-codes greater than/equal to 10 are shown in the following manner:
A long blink of 750 milliseconds indicating the decimal digit, followed by a
pause of 1500 milliseconds. The LED will then blink the number equal to the
error code. When all error-codes are displayed, the sequence is finished
with an LED display of 3 seconds. At this point the sequence will begin
again.
Example:
Error code position 1 2 3 4 5
Error buffer: 12 9 6 0 0
· After entering SDM:
· The sequence will begin with 1 long blink of 750 milliseconds, then pause
1500 milliseconds, then blink twice (indicating error code 12), then the LED
will pause for 3 seconds, then blink 9 times (indicating error code 9), then
the LED will pause for 3 seconds, then blink 6 times (indicating error code
6), then pause 3 seconds and blink for 3 seconds again, ending the blinking
sequence.
Exiting Service Default Mode
To exit the Service Default Mode, press the Power button.
Service Alignment Mode (SAM)
Introduction
The Service Alignment Mode (SAM) is used to align the set and/or adjust the
option settings and to display/clear the error code buffer values.
Entering Service Alignment Mode
To enter the Service Alignment Mode (SAM), press the following key sequence
on the remote control transmitter:
0-6-2-5-9-6-INDEX or STATUS
Do not allow the display to time out between entries while keying the
sequence
It is also possible to enter the Service Alignment Mode by pressing the
"VOLUME +" and "VOLUME -" key on the local keyboard simultaneously for at
least 4 seconds when the set is in SDM.
Exit SAM:
To exit the Service Alignment Mode, press the Power button.
In SAM the following information is displayed on the screen:
Display SAM Screen
Explanation notes/references:
1 Operation Hours (Run Timer):
This display indicates the accumulated total of operational hours.
(Shown in hexadecimal format)
2 Software identification of the main micro controller (A101US1-2.06)
A10 is the engineering chassis name for the A10 PTV chassis
· 1US1 is a character combination to indicate the software type and
the supported languages:
3AP1 or 3AP2 are also possible in the Asian Pacific Region.
· US = United States, AP = Asian Pacific
· 1 = Main Software language version number
· 2.06 = sub-version number
3 Error buffer (7 errors possible):
Displays the 7 most recent errors. The most recent error is displayed
at the upper left.
4 Option bytes (8 codes possible):
Summary of options is explained below.
5 Sub menus are listed in a scroll menu.
SAM Menu Control
Menu items may be selected using the cursor UP/DOWN keys.
· The selected item will be highlighted.
· When not all menu items will fit on the screen, pressing the cursor
UP/DOWN keys on the remote transmitter will display the next/previous menu
items.
With the cursor LEFT/RIGHT keys, it is possible to:
· (de)activate the selected menu item (e.g. GEOMETRY)
· change the value of the selected menu item ( e.g. VER-SLOPE )
· activate the selected submenu (e.g. SERV-BLK)
Access to normal user menu
Pressing the "MENU" button on the remote control switches between the SAM
and the normal user menus (with the SAM mode still active in the
background). Pressing the "MENU" key in a submenu will return the screen to
the previous menu.
The Menus and Submenus
Clear Errors
Erases the contents of the error buffer. Select the CLEAR ERRORS menu item
and press the cursor LEFT or cursor RIGHT key. The contents of the error
buffer are cleared.
The functionality of the OPTIONS and ALIGNMENTS (TUNER, WHITE TONE,
GEOMETRY, SOUND, and SMART SETTING) submenus are described in the service
adjustments.
Error code buffer and error codes
Explanation of the Error code buffer
The error code buffer con-tains all errors detected since the last time the
buffer was erased. The buffer is written from left to right. When an error
occurs that is not yet in the error code buffer, the error code will appear
at the left side and all other errors shift one position to the right.
The error code buffer will be cleared in the following cases:
· by activating CLEAR ERRORS in SAM menu
· exiting SDM or SAM with the "Standby" command on the remote control
· upon automatic reset when content has not changed for 50 consecutive hours
By leaving SDM or SAM via the power switch, the error buffer will not be
reset.
Examples:
ERROR: 0 0 0 0 0 0 0 : No errors detected
ERROR: 6 0 0 0 0 0 0 : Error code 6 is the last and only detec-ted error
ERROR: 9 6 0 0 0 0 0 : Error code 6 was first detected and error code 9 is
the last detected (newest) error
The contents of the error buffer can also be displayed by use of the
"blinking LED" procedure, if no picture is available. See explanation of
"The blinking LED procedure "below.
Error code definition
In case of non-intermittent faults, clear the error buffer before starting
the repair, to make sure "old" error codes are not present. If possible
check the entire content of the error buffers. In some situations an error
code is only the result of another error code (and not the actual cause).
Note: a fault in the protection detection circuitry can also lead to a
protection.
Error codes 1,2, 3, and 4 are protection codes, and in this case the
supplies of some circuits will be switched off. Also in protection, the LED
will blink the number of times equivalent to the most recent error code.
Error code table
Code Number
Error Description
00
Not an Error
01
Too high I-beam or East/West protection
02
Vertical protection
03
X-Ray protection
04
5 volt protection
05
- not used
06
General IIC error
07
BC loop not stabilized
08
Bocma TDA888X IIC error
09
Bocma IC 8v failure
10
NVM IIC communication error
11
Wrong NVM type
12
Microp internal RAM error
13
Main tuner IIC failure
14
Sound IC failure
15
SRAM test failure
16
PIP Tuner IIC failure
17
ECO Pip IC or DW Pip IC failure
18
I/O expander I2C error
19
Gemstar Guide Plus board
20
V-chip located on the DW Pip
21
Non-Volatile clock
22
Incredible picture (YUV) CR
23
Bocma DoubleWindow TDA888X error
24
- not used
25
- not used
26
- not used
27
Virtual Dolby
28
- not used
29
- not used
30
CSP i2c error
31
CSP NVM i2c error
32
CSP NVM error - not valid data
33
CSP dac i2c error
A10 PTV MODEL LISTINGS & SOFTWARE
MODEL
REGION
CHASSIS
SOFTWARE
43P8341/37
(USA Model)
PTV914, Fighter +
1US1 (see B)
43PP925/61
(Korea Model)
- - - -
3AP2 (see D)
43PP925/97
(Taiwan & Philippines Model)
- - - -
3AP1 (see D)
50P8341/37
(USA Model)
PTV915, Fighter +
1US1 (see B)
50P8342/37
(USA Model, Sears)
PTV916, Fighter +
1US1 (see B)
50PP241/76
(LATAM Model)
PTV918
1US1 (see C)
55P8241/37
(USA Model)
PTV910, Fighter
1US1 (see A)
55P8288/37
(USA Model, Best Buy)
PTV910, Fighter
1US1 (see A)
55P8341/37
(USA Model)
PTV915, Fighter +
1US1 (see B)
55P8342/37
(USA Model, Sears)
PTV916, Fighter +
1US1 (see B)
55PP241/76
(LATAM Model)
PTV918
1US1 (see C)
55PP925/61
(Korea Model)
- - - -
3AP2 (see D)
55PP925/97
(Taiwan & Philippines Model)
- - - -
3AP1 (see D)
60P8241/37
(USA Model)
PTV910, Fighter
1US1 (see A)
60P8288/37
(USA Model, Best Buy)
PTV910, Fighter
1US1 (see A)
60P8341/37
(USA Model)
PTV915, Fighter +
1US1 (see B)
60P8342/37
(USA Model, Sears)
PTV916, Fighter +
1US1 (see B)
60PP241/76
(LATAM Model)
PTV918
1US1 (see C)
64P8341/37
(USA Model)
PTV915, Fighter +
1US1 (see B)
64P8342/37
(USA Model, Sears)
PTV916, Fighter +
1US1 (see B)
Option Codes - NAFTA
A = USA Fighter, (1US1 Software)
B = USA Fighter +, (1US1 Software)
C = NAFTA Mexico, (1US1 Software)
1US1 CODE DESCRIPTIONS
A
B
C
SBNP
AUTO STANDBY NO PICTURE
OFF
OFF
OFF
CVI
COMPONENT VIDEO INPUT
ON
ON
ON
C169
COMPRESS 16:9 MODE AVAILABLE
OFF
OFF
OFF
E149
EXPAND 14:9 MODE AVAILABLE
OFF
OFF
OFF
SMCK
SMART CLOCK
ON
ON
ON
AV3
SIDE AV SOURCE
OFF
ON
OFF
CBFL
COMB FILTER
ON
ON
ON
IPIX
INCREDIBLE PICTURE
ON
ON
ON
IPMU
INCREDIBLE PICTURE VIA MENU ITEM
ON
ON
ON
VDBY
VIRTUAL DOLBY ENABLED
OFF
OFF
OFF
PLST
PROGRAM LIST
ON
ON
ON
SOSD
SMART OSD
ON
ON
ON
BLMU
BLUE MUTE
OFF
OFF
OFF
PIPC
PIP CONTROL
ON
ON
ON
PIPT
PIP TUNER
OFF
ON
OFF
VSLC
VERTICAL SLICING
ON
ON
ON
SURF
SURF FEATURE AVAILABLE
ON
ON
ON
CCAP
CLOSED CAPTION
ON
ON
ON
DNRM
DNR FUNCTION AVAILABLE
ON
ON
ON
NVCK
NON VOLATILE CLOCK
OFF
OFF
ON
VMUT
VIDEO BLANKING DURING CHANNEL CH
ON
ON
ON
TIME
TIMER FEATURE AVAILABLE
ON
ON
ON
AAVL
AVL AVAILABLE
ON
ON
ON
FUNN
FINE TUNING MENU ITEM
OFF
OFF
OFF
VCBK
V-CHIP BLOCK UNRATED MENU
ON
ON
ON
VBNR
V-CHIP BLOCK NO RATED MENU
ON
ON
ON
USRC
REMOTE A/B MENU ITEM
OFF
OFF
OFF
BNUM
NUMERICS DISPLAYED IN MENUS
ON
ON
ON
ROTI
ROTATION/TILT
OFF
OFF
OFF
SNIC
SOUND BOARD PRESENT
OFF
OFF
OFF
TMWIN
TIMEOUT FOR DIGIT ENTRY ON=5SEC OFF=2SEC
OFF
OFF
OFF
INCF
INTERNAL COMB FILTER PRESENT
ON
ON
ON
NVM
NVM CORRUPTION
ON
ON
ON
1US1LOW
PTV CLUSTER SELECT
ON
OFF
ON
1US1HIGH
PTV CLUSTER SELECT
OFF
ON
OFF
CL12
12/24 HOUR CLOCK ON=12 OFF=24
ON
ON
OFF
HWBMS
HARDWARE BLUE MUTE STREAK
OFF
OFF
OFF
OB1
CAN BE USED TO ADJUST OPTION BYTES AT ONCE
75
79
75
OB2
181
183
181
OB3
238
238
255
OB4
209
209
209
OB5
208
176
160
OB6-OB8
0
0
0
Option Codes - Asian Pacific
D = Taiwan & Philippines, (3AP1 Software)
Korea, (3AP2 Software)
3AP1 & 3AP2 CODE DESCRIPTIONS
D
ABSY
AUTO STANDBY AFTER NO INTERACTION
OFF
SBNP
AUTO STANDBY NO PICTURE
ON
CVI
COMPONENT VIDEO INPUT
ON
C169
COMPRESS 16:9 MODE AVAILABLE
OFF
E149
EXPAND 14:9 MODE AVAILABLE
OFF
HWBMS
HARDWARE BLUE MUTE STREAK
ON
SMCK
SMART CLOCK
ON
AV3
SIDE AV SOURCE
ON
AUSB
AUTO STANDBY AUTO ON
ON
CBFL
COMB FILTER
ON
IPIX
INCREDIBLE PICTURE
ON
IPMU
INCREDIBLE PICTURE VIA MENU ITEM
ON
VDBY
VIRTUAL DOLBY ENABLED
ON
PITN
PHILIPS TUNER
OFF
PLST
PROGRAM LIST
ON
SOSD
SMART OSD
ON
BLMU
BLUE MUTE
OFF
PIPC
PIP CONTROL
ON
PIPS
PIP SURF
ON
PIPT
PIP TUNER
ON
ISUR
INCREDIBLE SURROUND
ON
W4x3
DOUBLE WINDOW WITH 4:3 MAIN PICTURE AVAILABLE
ON
W169
DOUBLE WINDOW TWO COMPRESSED 16:9 AVAILABLE
OFF
VSLC
VERTICAL SLICING
ON
SURF
SURF FEATURE AVAILABLE
ON
CCAP
CLOSED CAPTION
ON
DNRM
DNR FUNCTION AVAILABLE
ON
VMUT
VIDEO BLANKING DURING CHANNEL CH
ON
TIME
TIMER FEATURE AVAILABLE
ON
AAVL
AVL AVAILABLE
ON
CHLK
CHILD LOCK FEATURE AVAILABLE
ON
ROTI
ROTATION/TILT
OFF
SNIC
SOUND BOARD PRESENT
ON
TMWIN
TIMEOUT FOR DIGIT ENTRY ON=5SEC OFF=2SEC
OFF
INCF
INTERNAL COMB FILTER PRESENT
ON
NVM
NVM CORRUPTION
ON
HWBMS
HARDWARE BLUE MUTE STREAK
OFF
OB1
CAN BE USED TO ADJUST OPTION BYTES AT ONCE
99
OB2
246
OB3
251
OB4
253
OB5
112
OB6-OB8
0
Option Codes - Late Production Change
Late Production SSM Panels with HWBMS "ON"
A = USA Fighter, (1US1 Software)
B = USA Fighter +, (1US1 Software)
C = NAFTA Mexico, (1US1 Software)
D = Taiwan & Philippines, (3AP1 Software) - Korea, (3AP2 Software)
A
B
C
D
HWBMS
HARDWARE BLUE MUTE STREAK
ON
ON
ON
ON
OB1
CAN BE USED TO ADJUST OPTION BYTES AT ONCE
75
79
75
99
OB2
181
183
181
246
OB3
238
238
255
251
OB4
209
209
209
253
OB5
OB6-OB8
0
0
0
0
Gray Scale Alignment
Gray Scale alignment will be necessary after changing the SSB (Small Signal
Board) or the CRTs.
Enter the Service Alignment Mode by entering 0-6-2-5-9-6-(Status or Index).
G2 Setup
Preferred Method
1. Connect a Black Level signal to the set.
2. Preset all G2 controls on the Focus/G2 Combo Block to minimum (fully CCW)
3. Connect an Oscilloscope to the Collector of each output transistor on the
Green CRT board. Set the probe to times 10.
4. Adjust the Green G2 control until the Black Level is at 200V.
5. Repeat steps 3 and 4 for the Red and Blue CRTs.
Alternate Method
1. Connect a Black Level signal to the set.
2. Preset all G2 controls on the Focus/G2 Combo Block to minimum (fully
CCW).
3. Turn each G2 control clockwise until each CRT is barely illuminated.
Gray Scale Setup
1. Connect a Gray Scale pattern to the set.
2. Preset the registers as shown below.
NORMAL RED 26
NORMAL GREEN 56
NORMAL BLUE 59
NORMAL BLACK LEVEL RED 10
NORMAL BLACK LEVEL GREEN 13
DELTA COOL RED -6
DELTA COOL GREEN -7
DELTA COOL BLUE 4
DELTA COOL BLACK LEVEL RED 2
DELTA COOL BLACK LEVEL GREEN 1
DELTA WARM RED 6
DELTA WARM GREEN 0
DELTA WARM BLUE -8
DELTA WARM BLACK LEVEL RED -2
DELTA WARM BLACK LEVEL GREEN -1
CATHODE DR 12
3. Set Brightness, Color, and Sharpness controls to 40 and Picture control
to maximum.
4. Adjust the NORMAL BLACK LEVEL controls to set the correct gray scale in
the dark areas of the picture.
5. Adjust the NORMAL RED AND BLUE controls to set the correct gray scale in
the light areas of the picture.
6. Use the Menu button on the Remote to back out to the main service menu.
7. Turn the set Off using the Power Button on the Remote or the front of the
set.
Customer Service Mode (CSM)
All PTV900 series sets are equipped with the "Customer Service Mode" (CSM).
CSM is a special service mode that can be activated and deactivated by the
customer, by request of the service technician/dealer in order to identify
the status of the set. This CSM is a 'read only' mode, therefore
modifications in this mode are not possible.
Entering the Customer Service Mode
The Customer Service Mode can be switched on:
· By pressing the MUTE button on the remote control and any key on the local
keyboard (Channel Up, Channel Down, VOL +, VOL -) on the TV simultaneously
for at least 4 seconds.
The following menu will appear.
Display CSM Screen
When the CSM is activated:
· picture and sound settings are set to nominal levels
· Modes that interfere with the behavior of the set are switched off (sleep
timer, auto standby, etc.)
Exit the Customer Service Mode
The Customer Service Mode will be switched off after:
· Pressing any key on the remote control (except "Channel Up" or "Channel
Down")
· Switching off the TV set by pressing the Power button on the remote
control or the local keyboard.
Exiting CSM resets the TV set back to its initial values.
The Customer Service Mode Information Screen
Upon entry into the Customer Service Mode the following screen will appear.
Display CSM Screen
The Customer Service Menu shows the following information:
- Line 1 : "HRS : nnnnn" and SWID : "A10BBC-X.Y"
HRS:
Indicates the accumulated total of operational hours. (Shown in hexadecimal
format.) (Standby hours are not counted as operating hours).
SWID:
Software identification of the main micro controller (example: A10US1-2.7)
A10 is the engineering chassis name for the PTV900 series chassis
· 1US1 is character combination to indicate the software type and the
supported languages:
3AP1 or 3AP2 are also possible for the Asian Pacific regions.
· US = USA/NAFTA, AP = Asian Pacific
· 1 = Main Software language version number
· 2.7 = sub-version number
- Line 2 : "CODES : xx xx xx xx xx xx xx "
Error code buffer (see explanation of error codes above) Displays the last 7
errors of the error code buffer.
- Line 3 : "OPT xxx xxx xxx xxx xxx xxx xxx xxx"
Option bytes
Option bits control the software and hardware functionality of the A10.0. An
option byte or option number represents 8 of those bits. Each option number
is displayed as a number between 0 and 255. The set may not work correctly
when an incorrect option code is set. See Service Adjustments for more
information on correct option settings
- Line 4: NOT USED
- Line 5 : "NO SIGNAL"
Indicates that the set is not receiving an "ident" signal on the selected
source.
· no or bad antenna signal; connect a proper antenna signal
· antenna not connected; connect the antenna
· no channel / preset is stored at this program number; go to the INSTALL
menu and store a proper channel at this program number
· the tuner is faulty (in this case the CODES line will contain number 13 or
16); check the tuner and replace/repair if necessary
Note: On some models, (if the BM option is ON), BLUE MUTE is displayed when
no signal is received.
- Line 6 : "TIMER ON "
Indicates that the on/off timer is running.
The following Complaints may be caused by the activation of the sleep timer:
The set may turn on from standby or may switch to a different channel
without using either the remote control or the local keyboard.
To switch off the activation timer:
Select "TIMER" in the "FEATURE" menu.
Select "ACTIVATE' in the "TIMER" menu.
Set to "OFF" with the left/right cursor keys.
- Line 7 : NOT AVAILABLE
- Line 8 : "NOT PREFERED"
Indicates that at least one channel is deleted as a preferred channel (by
default, all channels are skipped.
Note that "SKIPPED" will always be displayed in CSM unless all the channels
are not skipped.
To add a channel as a selected channel to the list of preferred channels:
Select "INSTALL" menu
Select "CHANNEL EDIT"
Select "ADD/DELETE"
Set to "ADD" with the left/right cursor keys
- Line 9 : "HOTEL MODE ON"
Indicates that the Hotel mode has been activated.
- Line 10 : "SOURCE :"
Indicates which SOURCE is installed for this preset.
EXT1, SVHS2, EXT2, Tuner.
- Line 11 : "SOUND"
Indicates which sound mode is installed for this preset.
Mono, NICAM, Stereo, L1, L2, SAP, Virtual or Digital
- Line 12 : "VOLUME"
Value indicates level at entry CSM.
- Line 13 : "BALANCE"
Value indicates level at entry CSM.
- Line 14 : "HUE"
Value indicates level at entry CSM.
- Line 15 : "COLOR"
Value indicates level at entry CSM.
- Line 16 : "BRIGHTNESS"
Value indicates level at entry CSM.
- Line 17 : "CONTRAST"
Value indicates level at entry CSM.
- Line 18: "SPEAKERS"
Indicates is the Speakers are On or Off.
Convergence Procedures
The set should be warmed up for at least 20 minutes prior to making any
Geometry or Convergence adjustments.
A signal must be applied to the set while performing Convergence or Geometry
alignments. This is necessary to provide the correct horizontal and vertical
sync to the Convergence panel. Failure to do so will result in an out of
convergence picture when signal is applied to the set.
The Serviced Technician should sit at least 5 to 10 feet from the front of
the screen while doing Convergence. Ensure that you are eye level with the
area of the screen you are adjusting.
When performing Digital Convergence, the adjustments are interactive. A
change in one quadrant will affect adjacent areas of the screen. Several
passes through the Convergence sequence may be necessary. When doing
Convergence, it is advised to follow the sequence pattern when going from on
adjustment location to another. Pressing the Right Cursor key will sequence
the Icon through a preloaded sequence.
When the Convergence error is small, a touch up Convergence will be all that
is necessary. Do not adjust Green Geometry while in this mode. A compete
in-depth Convergence is required when the Small Signal Module (SSM) or the
Convergence Memory IC, has been replaced. If the SSB (Small Signal Board) or
the Large Signal Board (LSB) has been replaced, a complete in-depth Geometry
should be completed before Convergence is adjusted. The Geometry alignment
should not be necessary if the SSB or LSB have not been changed.
Screen Templates
When performing a complete in-depth Convergence alignment, a Screen Template
is necessary to obtain the correct Geometry. The correct Templates are
listed below:
43 INCH ST4168
50 INCH ST4169
55 INCH ST4170
60 INCH ST4171
64 INCH ST4172
Touch-up Convergence adjustments
Enter the Digital Convergence Mode (DCM) by entering 0-6-2-5-9-7-(Status or
Index) on the Remote control. The following menu will appear:
Select an active channel or Aux Input. A signal must be applied to the set
when performing convergence. If any Customer Adjustments need to be made,
the Menu button can be used to toggle between the Customer Menu and DCM. The
MPOSD ADJUST is used to center the Customer Convergence grid. A highlighted
cross will appear along with the Convergence alignment grid. The highlighted
cross should be centered onto the center of the Convergence grid.
To perform a Touch Up Convergence, highlight SELECTION and press the right
cursor button on the remote. The following menu will appear:
Selections STORE, RESTORE FACTORY, and RESTORE DEFAULT are not shown after
selecting SELECTION. Press the cursor down button on the Remote for these
selections to appear. RESTORE FACTORY loads Convergence defaults from the
Factory Loaded section of the Convergence Memory IC. RESTORE DEFAULT loads
Convergence defaults from the sets software.
To perform a Touch-up Convergence:
1. Enter the Convergence Mode and select RED TO GREEN or BLUE TO GREEN. Do
not select GREEN (Green Geometry) without placing a Template over the
screen. To perform Green Geometry, refer to the Complete in-depth
Convergence.
2. Use the Cursor buttons on the Remote to Navigate from one adjustment
point to another. Press the Status or Index button on the Remote to select
ADJUST. Use the cursor buttons on the Remote to adjust the Red to Green or
Blue to Green. Press the Status or Index button again to navigate to the
next adjustment location.
3. After Convergence alignments are complete, press the Menu button on the
Remote to return to the SELECTION menu.
4. Highlight the STORE selection and press the right cursor key on the
Remote to save changes.
5. Use the GREEN TO RED or GREEN TO BLUE selections to perform convergence
when the Green CRT has been replaced.
Complete in-depth Convergence
SCREEN CENTERING
1. Make sure a signal is applied to the set.
2. Enter the Convergence mode by entering 0-6-2-5-9-7-(Status or Index).
Select an active channel or input. If the Customer settings need to be
adjusted, pressing the Menu button will access the Customer menu.
3. Place a Template over the screen.
4. Select GREEN in the SELECTION menu.
5. Place a jumper across connector 1005 on the SSM to defeat convergence
drive.
6. Using the centering rings on the Green CRT, center the convergence
pattern onto the center point of the Convergence Template.
7. Press the Menu button on the Remote to return to the SELECTION menu.
8. Select RED TO GREEN in the menu.
9. Center the Red pattern onto the Green pattern.
10. Select BLUE TO GREEN in the SELECTION menu.
11. Center the Blue pattern onto the Green pattern.
12. Remove the Jumper on connector 1005.
Note: If a CRT has been replaced, it is only necessary to perform Screen
Centering for the CRT being replaced.
GREEN GEOMETRY
1. Make sure a signal is applied to the set.
2. Enter the Convergence mode by entering 0-6-2-5-9-7-(Status or Index). Use
the Menu button to toggle between DCM and Customer Mode. Select an active
channel or input while in the Customer Mode.
3. Place a Template over the Screen.
4. Select GREEN in the SELECTION menu.
5. The Icon will appear in the center of the screen. Press the Right Cursor
key on the remote to move the Icon to the next adjustment location. At each
location press the Status or Index button to enter the ADJUST mode. Using
the Cursor keys, adjust the Icon onto the adjustment point on the template.
It is recommended that the two outside vertical lines not be adjusted in the
first two passes.
6. Continue to follow the pattern and make corrections until the Convergence
Crosshatch pattern matches the Template.
7. Press the Menu button to return to the SELECTION menu.
8. Use the Cursor down key to highlight the STORE selection.
9. Press the Right cursor key to save the alignments.
10. Remove the Template.
RED CONVERGENCE
1. Select RED TO GREEN in the SELECTION menu.
2. Adjust the Red crosshatch pattern onto the green pattern in the same
manner that Green was adjusted to the Template.
3. Save the alignments.
BLUE CONVERGENCE
1. Select BLUE TO GREEN in the SELECTION menu.
2. Adjust the Blue crosshatch pattern onto the green pattern in the same
manner that Green was adjusted to the Template.
3. Save the alignments.
Complete in-depth Geometry
To activate the Service Alignment Mode, enter 0-6-2-5-9-6-(Status or Index)
using the Remote Control.
Press Status or Index toggle to the Customer menu. Select an active channel.
Pressing the Status or Index button will bring up the SAM mode.
1. Apply a Crosshatch pattern to the set and select that input.
2. Defeat Convergence by shorting the two pins of connector 1005 on the SSM.
3. Press the Cursor-down key on the remote and select Geometry with the
Right cursor key.
4. Adjust the Screen Geometry as necessary.
The following are default values:
VER.AMPL 30
VER.SLOPE 34
SERV.BLK OFF
HOR.SHIFT 32
HOR.BOW 20
HOR.PARALLEL 31
EW.WIDTH 22
EW.PARA 21
EW.TRAP 19
EW.UCORN 6
EW.LCORN 0
H60.WIDTH 2
H60.PARA 0
H60.SHIFT 7
V60.AMPL 0
VER.SCOR 18
VER.SHIFT 35
VER.ZOOM 32
VER.SCROLL 32
To save changes, use the Menu button on the Remote to back out to the main
menu. Then turn the set Off using the power button on the Remote or the
front of the set. This will save any changes made.
Troubleshooting Tips
The Power Supply Circuit
When the set is turned On, the Main Switch Mode power supply is turned On.
This supply produces the +130 volt,+32 volt,-32 volt, two +15 volt, and
Audio supplies. When IC 7302 develops a normal steady state operation, the
130 volt supply is sampled by resistors 3324,3323,and 3322.
This sample voltage is then sent to Shunt regulator 7303 which drives the
feedback optoisolator 7303.The feedback voltage on Pin 14 is then compared
with an internal 2.5 volt reference by comparator "C". Comparator "C" then
sets the reference voltage on the inverting side of comparator "B" to
control the On time of the drive at Pin 3.If the voltage on Pin 14 increases
due to the 130 volt supply increasing, the On time of the pulse on Pin 3
will be reduced. If the 130 volt supply decreases, the voltage on Pin 14
would decrease, causing the On time of the pulse on Pin 3 to increase. This
is used to keep the 130 volt supply at the correct voltage. Variable
resistor 3322 is used to adjust the 130 volt supply to the correct level.
The overvoltage protection circuit of the IC will shut the IC down if the
VCC level on Pin 1 exceeds 17 volts.
To troubleshoot this circuit, first check the On/Off line from the Small
Signal Panel to ensure that it is going Low. Then check for the presence of
startup voltage on Pin 1 of the regulator IC 7302.If the IC is working
correctly, this voltage will be changing from 9.4 to 14.5 volts. If the
startup voltage is not present, check the startup resistor 3300 and the
bridge rectifier. If the voltage on Pin 1 is changing, check the drive
signal on Pin3.Then check for signal on the gate and drain of 7301.An
excessive load on the secondary, a short on the 130 volt line for example,
would cause the supply to pulse with little or no voltage on the secondary.
Picture problems
Picture too dark or too bright
- Press "Smart Picture" button on the remote control. If this improves the
picture, increase / decrease the brightness value or increase / decrease the
contrast value.
- Enter the Customer Service Mode. If this improves the picture, exit
Customer Service Mode, then Increase / decrease the brightness value or
increase / decrease the contrast value.
White line around picture elements and text
- Press "Smart Picture" button on the remote control. If this improves the
picture, decrease the sharpness value.
- Enter the Customer Service Mode. If this improves the picture. Decrease
the sharpness value.
Snowy picture
- Snow is an antenna or antenna connector problem. Check tuner and AGC.
Black and white picture
- Press the "Smart Picture" button on the remote control. If this improves
the picture, increase the color value.
- Enter the Customer Service Mode. If this improves the picture. Increase
the color value.
Menu text not sharp enough
- Press the "Smart Picture" button on the remote control. If this improves
the picture, decrease the contrast value.
- Enter the Customer Service Mode. If this improves the picture. Decrease
the contrast value.
Sound problems
No sound or sound too loud (after channel change / switching on)
- Enter the Customer Service Mode. If the volume is OK, increase / decrease
the volume level.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, December 09, 2003 3:44 PM
Subject: [TechAssist] fix.Magnavox 60P8241,PTV915 proj. shuts off after
1min,getting worse]]
> See thread for history on this fix. The final fix was replace the "SSB"
> board.
> I read an article that said a zener on that board causes most of the
> failures. Zener 6031 (2.4 volt, #9340 548 42115).
> I replaced it and the set did run well past the usual failure time, but
> several hours it shut down with the power LED flashing.
> Replacing the whole SSB (PH3912725881)cured it.It ran all weekend.
> Now:Question...
> How do I get into the service menu to adjust the vert. height? It's a
> bit too overscanned.
> Are the parameters self explanitory?
> Probably only needs a touch up.
> Phil
>
>
> You are correct on all counts.
>
> Bob Waterman, CET® #RI-28
> Master Technician License #9109
> Service Manager / Parts Manager
> Gemini Computer, TV, & Security Alarms
> (508)695-7302
> (508)695-7769 FAX
> geminitv@xxxxxxxxxxxxxxxx
> geminitv@xxxxxxx
> www.geminicomputertvsecurityalarms.com
>
>
>
> > OK....
> > I know I was told by Philips tech assist to change the SSB #
> > 313912725881.(upright plug-in board next to tuner).You are saying on
> > that board, the eeprom is ref 7066.On this board I see a ref ?066. A
> > small flat pack with 8 pins: "24C32W6" on it. This is the eeprom I swap,
> > right?
> > Next question:
> > You then mentioned another board, the SSM, or Small Signal Module, with
> > yet another eeprom on IT. Is this SSM the large board with the heat
> > sinks, STK ICs,etc that the smaller SSB plugs into? I am not changing
> > that board, so that eeprom can stay untouched, correct?
> > Sorry for the slowness, need exact clarification.I am blurring the
> > references between these two boards.
> > Phil
> >
> > Gemini Computer & TV wrote:
> > >
> > > It is ref# 7066 (M24C32-WBN6) on the SSB (small signal board) and
there
> is
> > > one that is ref# 7007 (M24C32-WMN6) on the SSM (small signal module).
> > >
> > > Bob Waterman, CET® #RI-28
> > > Master Technician License #9109
> > > Service Manager / Parts Manager
> > > Gemini Computer, TV, & Security Alarms
> > > (508)695-7302
> > > (508)695-7769 FAX
> > > geminitv@xxxxxxxxxxxxxxxx
> > > geminitv@xxxxxxx
> > > www.geminicomputertvsecurityalarms.com
> > >
> > > ----- Original Message -----
> > > From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Tuesday, November 18, 2003 3:53 PM
> > > Subject: [TechAssist] Re: Magnavox 60P8241,PTV915 proj. shuts off
> > > after1min,getting worse]
> > >
> > > > Ok, And how do I "ID" the eeprom? I assume it's one of the flat
packs,
> > > > but which one?
> > > > I'm on a learning curve on this one, fellas!
> > > > ;-)
> > > > Phil
> > > >
> > > > "Ron Miller d.b.a. Country TV" wrote:
> > > > >
> > > > > Install the old EEPROM onto the new (replacement) SSB.
> > > > >
> > > > > Country TV
> > > > > Ron Miller
> > > > > Inez, TX. 77968
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Tuesday, November 18, 2003 2:08 PM
> > > > > Subject: [TechAssist] Re: Magnavox 60P8241,PTV915 proj. shuts off
> after
> > > > > 1min,getting worse]
> > > > >
> > > > > > 2nd Update after calling Philips technical (see my bottom orig
> post):
> > > > > > I called Philips,Ken was very helpful.
> > > > > > I mentioned the shut down after an hour, then half hour,etc,
> getting
> > > > > > worse. Also mentioned the channel number OSD bouncing all over
the
> > > > > > screen just before it shut down, then the two blinks of the
power
> > > button
> > > > > > LED after shut down.
> > > > > > Ken did say this is typical of the SSB board (PH313912725881).
He
> says
> > > > > > the two blinks error means vertical protect.But since the
picture
> was
> > > > > > stable, and only the OSD flipped vertically, then not a
deflection
> > > > > > issue. That SSB with the micro on it was sending bad signal and
> > > > > > triggering the vertical protect shutdown. He just about bet the
> farm
> > > on
> > > > > > that. The OSD flip, stable p[icture, two blinks, all point to
that
> > > board
> > > > > > he said.
> > > > > > I guess I will figure the estimate with the SSB and see.
> > > > > > I understand with changing the SSB board, convergence has to all
> be
> > > > > > redone. I would like some feedback as to the time for that, so
as
> to
> > > > > > adjust my cost estimate properly.
> > > > > > And does anyone have the PDF on this? I will need info to enter
> > > service
> > > > > > mode,adjust,etc.
> > > > > > I will let the group know my results.
> > > > > > Either cheers or tears!
> > > > > > ;-)
> > > > > > Phil Bader
> > > > > >
> > > > > >
> > > > > >
> > > > > > Update:
> > > > > > The last time it shut down, I noticed the OSD characters were
all
> over
> > > > > > the screen jumping. (not the picture, the OSD channel number).
> Would
> > > > > > this small "SSB: next to the tuner do this?
> > > > > > I am just paranoid ordering a 150.00 board as an "experiment".
> > > > > > I will contunue to selectivle heat areas of the chassis to
isolate
> the
> > > > > > offending area.
> > > > > > ;-)
> > > > > > Phil Bader
> > > > > > Jan Phyl TV Inc.
> > > > > >
> > > > > > Philip Bader wrote:
> > > > > > >
> > > > > > > This is in ref to my 60P8241, PTV910 chassis.
> > > > > > > Since my last post, I pulled the SSB (part# on board:
> > > 313912725881/NLA/
> > > > > > > alt#: PH3912725881. cost 151.62 out, 101.62 exch.)This is the
> > > upright
> > > > > > > board with the white ribbon cable going to an edge connector
at
> it's
> > > top
> > > > > > > edge, this board is located beside the tuner, with SMD
> electrolytics
> > > and
> > > > > > > flat packs on it.
> > > > > > > I carefully inspected it and used my Dick Smith ESR cap
tester.
> I
> > > found
> > > > > > > all SMD electrolytics clean, no leaks and acceptable ESR
> > > measurements.
> > > > > > > For the moment I don't think the commonly bad SSB here is the
> > > culprit.
> > > > > > > Customer smokes, and had nasty thick dust all over boards
which
> I
> > > > > > > vacuumed away.I reinstalled customer's SSB and powered set
up.I
> > > flexed
> > > > > > > all boards as it ran, does not seem connection related.It does
> seem
> > > it
> > > > > > > temperature related. It ran all day until a few hours ago,
shut
> off,
> > > and
> > > > > > > the power button flashes a series of two blinks, pause, then
two
> > > > > > > blinks...
> > > > > >
> > > > > > > >
> > > > > > > > > Philip,
> > > > > > > > > Just completed a PTV915 with same problem. Replaced
> > > > > > > > > the SSB, a common problem. You will need to redo the
> > > > > > > > > convergence after replacing. Also try adjusting the g2
> > > > > > > > > voltages 1st, in case they are off. I read each of the
> > > > > > > > > g2 voltages to see if they are the same. Be aware that
> > > > > > > > > the set will shut off when reading the g2 volts, at
> > > > > > > > > least they did using a Fluke Model 70. Of course,
> > > > > > > > > other problems could be causing shutdown. My 3rd guess
> > > > > > > > > would be to change the LSB if shutdown continues.
> > > > > >
> > > > > >
> > > > > > George
> > > > > > Johnson TV
> > > > > >
> > > > > > > > > --- Philip Bader <tjanphyl@xxxxxxxxxxxxxxx> wrote:
> > > > > > > > > > Magnavox projection TV model 60P8241, chassis#
> > > > > > > > > > PTV910, made in 2001.
> > > > > > > > > > Started out taking several hours of good operation,
> > > > > > > > > > then it would shut
> > > > > > > > > > off, LED flashing. After months ,customer said it's
> > > > > > > > > > taking less time.
> > > > > > > > > > (30 min).
> > > > > > > > > > I find very little in the archives on this 2001 year
> > > > > > > > > > 60" TV.
> > > > > > > > > > Need any histories or info on this model/symptom.
> > > > > > > > > > Thanks,
> > > > > > > > > > Phil Bader
> > > > > > > > > >
> > > > > >
> > > > > >
> > > > >
> > >
>
****************************************************************************
> > > > > *
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> > > > >
> > >
>
****************************************************************************
> > > *
> > > > > Classifieds! Buy or Sell!
> > > > > http://sell.tech-assist.org
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> > > > --
> > > > Philip Bader
> > > > Jan Phyl TV Inc. (estab. 1976)
> > > > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > > > Fax (863) 299-8821
> > > > email: tjanphyl@xxxxxxxxxxxxxxx
> > > >
> > > >
> > >
>
****************************************************************************
> > > *
> > > > Classifieds! Buy or Sell!
> > > > http://sell.tech-assist.org
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> > > >
> > >
> > >
>
****************************************************************************
> *
> > > Classifieds! Buy or Sell!
> > > http://sell.tech-assist.org
> > > The Tech Address Book:
> > > http://www.tech-assist.org/secure/tip/contact.htm
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> >
> > --
> > Philip Bader
> > Jan Phyl TV Inc. (estab. 1976)
> > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > Fax (863) 299-8821
> > email: tjanphyl@xxxxxxxxxxxxxxx
> >
> >
>
****************************************************************************
> *
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> >
>
>
****************************************************************************
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