Philips 107B7 User Manual
17” CDT Color Monitor 107B7
Service
Service
Service
30-86 kHz
Horizontal Frequency
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents...................................................1
Revision List.......................................................2
Important Safety Notice.................................3
1. Specifications..........................................4
2. Precaution and notices................................7
2-1Safety precautions....…...............…..............7
2-2 Product safety notice ..........................................7
2-3 Service Notices....................…………......7
2-4 High voltage warning............................................8
3. Operating Instructions................…………….............9
4. Adjustment .........................……………………….......10
4 -1. Adjustment conditions and precautions ...……........10
4-2. Main adjustments.........…………………...................10
4-3 Adjustment methods........................................13
4-4 DDC Instructions………………………….……….…….17
5.Circuit description ..……..……………………............22
5-1.Micro controller and deflection circuit .………….......22
5-2.Transistor & diode circuit...............................24
6.Mechanical Instructions......................…………….......25
7.Trouble shooting chart..........................……….......28
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 TRANSFOMER FOR THIS UNIT WHEN SERVICING
SAFETY NOTICE
7-1.Noraster,CRT relative circuit problems...........……........28
7-2. Abnormal displays................………………………..…...30
7-3 No blanking................................................31
7-4 Hor./OSC/DEF/HV circuit fault................................31
7-5. Abnormal horizontal deflection...................................32
7-6. Abnormal vertical scanning............…........................33
7-7. Side-pin cushion distortion.........………………........33
7-8. Poor focus...................................…….............33
7-9. Power supply trouble shooting chart.................35
8. Mechanical of cabinet front dis-assembly...………......35
9. Spare parts list..........................................36
10. Different parts list..........................................47
11 Block diagram............................................48
12 IC block diagrams.............................................49
13 PCB layout............................................55
13-1 Main PCB layout..........................................55
13-2. CRPC board layout.........................................56
14. Schematic diagram.........................................57
15. General Product Specification…………………………61
3138 106 10530
GB
1
17” CDT Color Monitor 107B7
Revision List
Version Date Revision History
A00 May-28-2006 Initial Release
2
17” CDT Color Monitor 107B7
A
Important 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
REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINGS
Proper service and repair is important to the safe, reliable operation of all PHILIPS Company Equipment. The service
procedures recommended by PHILIPS and described in this service manual are effective methods of performing
service operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods
may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT
EXHAUSTIVE. PHILIPS could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, PHILIPS has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by PHILIPS must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, PHILIPS Company will be referred to as PHILIPS.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock,
fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from PHILIPS.
PHILIPS assumes no liability, express or implied, arising out of any unauthorized modification of design. Servicer
assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER - Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM.
UTION - Use of controls or adjustments or performance of procedures other than those
CAUTION - The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY
ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH
THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE MANUAL.
specified herein may result in hazardous radiation exposure.
3
17” CDT Color Monitor 107B7
1. Monitor Specifications
1. CRT : 43.2CM(17") 90 Deflection, 29mm Neck, 0.25mm phosphor dot pitch, Pure Flat high brightness high
contrast CRT, Non-Glare Screen
2. Viewable image Size: 40.6CM (16") diagonal
3. Display Color: Unlimited Colors
4. External Controls:
Power On/Off, OSD key, OSD Function: Contrast, Brightness, H-Center, H-Size, V-Center, V-Size, Zoom,
Pincushion, Trapezoid, Pin-Balance, Parallelogram, Rotation, 6500 Color Temperature, 6500 Color
Temperature, User Color, 9300 Color Temperature, Degauss, Moire Reduce, Recall, Exit, Language.
5. Input Video Signal
6. Scanning Frequencies
7. Factory Preset Timings: 8
User Timings:6
8. Main dimensions/weight
9．POWER CONSUMPTION
Power on - < 75w.
DPMS off state - < 2w at 240Vac.
Power off (by switch) - < 1w at 120Vac, <2w at 240Vac.
Resolution 640 x 480 640 x 480 720 x 400
H. Frequency 31.469 kHz 43.269 kHz 31.468 kHz
V. Frequency 59.941 Hz 85.008 Hz 70.084 Hz
Resolution 800 x 600 800 x 600 1024 x 768
H. Frequency 46.875 kHz 53.674 kHz 60.023 kHz
V. Frequency 75.000 Hz 85.061 Hz 75.029 Hz
Resolution 1024 x 768 1280 x 1024
H. Frequency 68.677 kHz 79.976 kHz
V. Frequency 84.997 Hz 75.024 Hz
Timing 1. 2. 3.
Timing 4. 5. 6.
Timing 7. 8.
Horizontal: 30KHz ~ 86KHz
Vertical: 50 Hz ~ 160 Hz
Monitor (with stand)
Width: 397 mm 460 mm 446 mm
Height: 428 mm 450 mm 420 mm
Depth: 423.5 mm 526 mm 475 mm
Weight: 13.5 kg 15.8 kg 15.4 kg
Packed Monitor (for
China, India)
Packed Monitor(for
other regions)
4
17” CDT Color Monitor 107B7
10. Video Bandwidth: 180 MHz
11. Power Source:
Switching Mode Power Supply
AC 90 ~264V, 50±3/60±3Hz Universal Type
12. Operating Temperature: 0°C to 40°C Ambient
13. Humidity: 5% to 90% Relative, Non-Condensing
14. External Connection:
15 Pin D-type Connector
AC Power Cord
15. Regulations/Safety:
International Regulatory Specification
COUNTRY DOMAIN
INTERNATIONAL Sa
Sa
EUROPE
E
Sa EN60950-1: 2001 TUV certificate
O
GERMANY
O GS-Mark / EK1-ITB 2000 TUV-GS certificate
SAFETY / EMC / ERGONOMICS /
STANDARDS
IEC60950-1: 2001. Group -and national
differences of all countries listed in CB
Bulletin No. 107A
European Low Voltage Directives
73/23/EEC and 93/68/EEC
European Electromagnetic Compatibility
Directive 89/336/EEC amended by the
directive 93/68/EEC. EN 55022:1998
Class B
EN 55024: 1998
EN 61000-3-2: 2000
IEC 61000-3-3: 1994/EN61000-3-3:
1995
CISPR 22:1997 Class B International
EMC standard
ISO 9241-3-7-8 (CRT) & 13406-2 (LCD),
prEN 50279:1998
DOCUMENTS
CB Report and CB certificate
Declaration of Conformity
Declaration of Conformity and Full
EMC/CE test report
TUV-ERG certificate
X Decree ROV 08.01.87 (CRT) PTB
Sa EN60950-1: 2001 SEMKO certificate
SWEDEN
RUSSIA Sa GOST R 50377-1992 GOST certificate
SOUTH AFRICA
O TCO 99 (TCO03) (to TCO models) TCO99 (TCO03) report + certificate
O
Sa SABS IEC 60950 and IEC 60950-1 Certificate of Conformity
MPR 1990: 8 / MPR 1990:10 (to MPR
models)
5
Meet requirement
17” CDT Color Monitor 107B7
USA
CANADA
MEXICO Sa NOM-019-SCFI-1994 NOM certificate
KOREA
SINGAPORE Sa IEC60950 PSB certificate
CHINA
TAIWAN
E EN55022 or Cisper 22 Certificate of Conformity
Sa UL 60950-1: 2003 UL certificate
E FCC Part 15 Class B FCC ID grant or DOC
O Energy Star EPA registration
X 21CFR 1002.10 to 13 (CRT) DHHS report
Sa CSA C22.2 No 60950 CSA certificate
E ICES-003 issue 3 Statement on label
E RED (CRT) DNHW
Sa Korean Safety Control law IEC 60950 eK certificate
E
Sa GB4943-2001
E GB9254-1998; 17625.1-2003
O CSC/G1205-2004 CECP certificate
Sa CNS-14336 (IEC 60950-1)
E CNS-13438 (CISPR22) Class B
Regulations laws: EMI 1996-78, 80. EMS
1996-79,81
MIC certificate
CCC certificate
BSMI certificate
O Criteria 18 (Monitor) (LCD) Green Mark / certificate
AUSTRALIA/
NEW-ZEALAND
ISRAEL
Saudi Arabia
Japan
Argentina Sa EN60950-1: 2001
Sa = Safety
E = Electromagnetic Compatibility
O = Other which including recycling, energy saving, ergonomics
X = X-ray
For detailed regulatory items please refer to the international regulatory specification provided by Philips.
E AS/NZS3548: 1995 Declaration of Conformity
S IS 1121, IEC60950/IEC60950-1 Certificate of Conformity
E EN or Cisper 22 Certificate of Conformity
S IEC standard SASO
E IEC standard SASO
Sa EN60950-1:001 (AC adapter only) PSE
E
VCCI class B (CISPR 22) VCCI Certificate
IRAM
6
17” CDT Color Monitor 107B7
2. Precautions and notices
2-1.Safety precautions
1. Observe all caution and safety related notes located inside the display cabinet.
2. Operation of the display with the cover removed, may cause a serious shock hazard from the display power
supply. Work on the display should not be attempted by anyone who is not thoroughly familiar with
precautions necessary when working on high voltage equipment.
3. Do not install, remove or handle the picture tube in any manner unless shatter-proof goggles are worn.
People who are not so equipped should be kept away while handling picture tube. Keep picture tube away
from the body while handling.
4. The picture tube is constructed to limit X-RAY radiation to 0.5 mR/HR. For continued protection, use the
designated replacement tube only, and adjust the voltages so that the designated maximum rating at the
anode will not be exceeded.
5. Symbol“ “ means safety relative parts. The use of substitute replacement parts which do not have the
same characteristics as specified in the parts list may create shock, fire or explode etc.
6. Symbol“ ” means X-ray relative parts. Before replacing any of these components please read the parts
list in this manual carefully to avoid creating higher anode voltage or x-ray. Especially for sealed controls,
such as VR902 and FBT screen VR etc, which were sealed by the manufacturer once their optimum
position has been set, please don’t dismantle them as your likes, otherwise you will break or damage the
component. If you need replace the parts with sealed control, please adjust the relative VR to make sure the
B+ voltage about 53.5.0V and well seal it with A+B glue or equivalent, which you can not move away with
one screw driver
7. Before returning a serviced display to the customer, a thorough safety test must be performed to verify that
the display is safe to operate without danger or shock. Always perform an AC leakage current check on the
exposed metallic parts of the cabinet, such as screw heads.
Test method for current leakage is described as follow.
(a) Plug the AC line cord directly into rated AC outlet (do not use a line isolation transformer during this
check).
(b) Use an AC voltmeter having 5000 ohms per volt or with more sensitivity in the following manner:
Connect a 1500 ohms 10 Watt resistor, paralleled by a 0.15UF, AC type capacitor between a known
good earth ground (water pipe, conduit, etc.) and the exposed metallic parts simultaneously. Measure
the AC voltage across the combination of 1500 ohms resistor and 0.15UF capacitor.
(c) Reverse the AC plug at the AC outlet and repeat AC voltage measurements for each exposed metallic
part.
(d) Voltage measured must not exceed 0.5 volts RMS. This corresponds to 0.35 milliamp AC. Any value
exceeding this limit constitutes a potential shock hazard and must be corrected immediately.
7
17” CDT Color Monitor 107B7
2-2 Product safety notice
Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection
afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage,
wattage, etc. Before replacing any of these components read the parts list in this manual carefully. The use of
substitute replacement parts which do not have the same safety characteristics as specified in the parts list may
create shock, fire, X-RAY radiation or other hazards.
2-3 Service notes
1. When replacing parts or circuit boards, clamp the lead wires around terminals before soldering.
2. When replacing a high wattage resistor (more than 1/2W of metal oxide film resistor) in circuit board, keep
the resistor about 10mm (1/2 in) away from circuit board.
3. Keep wires away from high voltage or high temperature components.
4. Keep wires in their original position so as to reduce interference.
2-4 High voltage warning
Operation of monitor outside of cabinet or with back removed may cause a serious shock hazard. Work on this
model should only be performed by those who are thoroughly familiar with precautions necessary when working
on high voltage equipment.
Exercise care when servicing this chassis with power applied. Many B plus and high voltage terminals are
exposed which, if carelessly contacted, can cause serious shock or result in damage to the chassis. Maintain
interconnecting ground lead connections between chassis and picture tube dag when operating chassis.
Certain HV failures can increase X-ray radiation. Monitor should not be operated with HV levels exceeding the
specified rating for the chassis type. The maximum operating HV specified for the chassis used in this monitor is
23.0KV ± 1KV
with a line voltage of 120/240 VAC. Higher voltage may also increase possibility of failure in HV supply.
It is important to maintain specified values of all components in the horizontal and high voltage circuits and
anywhere else in the monitor that could cause a rise in high voltage or operating supply voltages. No changes
should be made to the original design of the monitor. Components shown in the shaded areas on the schematic
should be replaced with exact factory replacement parts. The use of unauthorized substitute parts may create a
shock, fire or other hazard.
To determine the presence of high voltage, use accurate, high impedance, HV meter connected between second
anode lead and CRT dag grounding device. When servicing the High Voltage System, remove static charge from
it by connecting a 10K ohm resistor in series with an insulated wire (such as a test probe) between picture tube
dag and 2nd anode lead.(AC line cord disconnected from AC power outlet.)
The picture tube used in this monitor employs integral implosion protection. Replace with tube of the same type
number for continue safety. Do not lift picture tube by the neck. Handle the picture tube only after discharging the
high voltage completely.
8
17” CDT Color Monitor 107B7
3. Operating instructions
This procedure gives you instructions for installing and using the Color display.
1. Position the display on the desired operation and plug the power cord into a convenient AC outlet. Three-
wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and
cabinet to the electrical conduit ground. If the AC outlet in your location does not have provisions for the
grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.
2. Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws on
the connector to ensure firm grounding. The connector information is as follow:
Pin No.
Description
1. Red video 9. +5V (Supply from PC for DDC circuit)
2. Green video 10. Sync GND
3. Blue video 11. GND
4. GND 12. DDC serial data
5. Self test 13. H-sync
6. Red GND 14. V-sync
7. Green GND 15. DDC serial clock
8. Blue GND
3. Apply power to the display by turning the power switch to the "ON" position and allow about thirty seconds
for display tube warm-up. The Power-On indicator lights when the display is on.
4. With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness
and contrast to the most pleasing display.
5. This monitor has power saving function following the VESA DPMS. Be sure to connect the signal cable to
the PC.
6. If your color display requires service, it must be returned with the power cord.
1
6
11 15
5
10
15 - Pin Color Display Signal Cable
Pin No.
Description
9
17” CDT Color Monitor 107B7
4. Adjustment
4-1 Adjustment conditions and precautions
1. Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully
preset at the factory.
4-2 Main adjustments
10
17” CDT Color Monitor 107B7
Basic and simple instruction on the control keys
On the front controls of your monitor, once you press the MENU button, the On Screen Display
(OSD) Main Controls window will pop up and you can now start making adjustments to your
monitor's various features. Use the
to make your adjustments within.
The OSD Tree
Below is an overall view of the structure of the On-Screen Display. You can use this as reference
when you want to later on work your way around the different adjustments.
Your monitor may not include all the items in the OSD tree shown below.
11
17” CDT Color Monitor 107B7
12
17” CDT Color Monitor 107B7
4-3 Adjustment method
1. B + & HV voltage adjustment:
A.Chroma-2135 Signal generator or PC equivalent set mode 6, UVGA 1280X1024 pattern 101 .
B.Connect a DC Volt meter between TP902 and ground, then adjust VR902 to be 140±1 VDC for CPT and LG
CRT.
C.Set the contrast and brightness max,and then adjust G2=600V for CPT CRT and G2=560V for LG CRT.
2. Factory preset Timings Adjustment:
A. Press MENU Key to show OSD menu ,and press the down Key to select the "ZOOM" function,
B. Then press the menu Key to enter second menu, press the down key to select zoom”
Do not release it, until the OSD menu changed to the Factory preset window.
C. The Factory preset window contains the following functional controls. Select one of the control. Then press
the Left/Right ,Up/Down Key to adjust its value for the optimum picture.
” about 10S.
SR
55
OS
LH
SB
BI
SW
DC
AB
Save SRGB color
Save 5500C color
User OSD size
Brightness
SBQ
Set Burn/in Off & On
Set H/Freq Max 85~72K
DCOffset ADJ
ABL
13
VO
VG
HM
HR
HS
HG
V Offset
V Gain
H size Max
H Size Range
HSUB Size Range
H Gain
HBRIOSD VC
HBRIOSD HC
User adjustment
17” CDT Color Monitor 107B7
OV
OH
EA
HE
VE
EO
EU
BP
BB
TB
HB
HS
TM
User OSD VC
User OSD HC
EHT Auto Adjustment
HEHT Gain
VEHT Gain
EHT Offset
EHT Current
B Plus
Bottom Balance
Top Balance
HS Wave Balance
HSWAVE
User Timr:00273hours
Save and Exit
Degauss
B-Bias
G-Bias
R-Bias
G-Gain
B-Gain
R-Gain
Brightness
Contrast
V-Moire Reduce
H-Moire Reduce
PIN-Balance
65
93
VF
VB
VI
HL
BC
TC
D. To switches the input signal to the other Timing Mode. Please follow step A ~ C to get the optimum
picture.(H/V-size:312*234mm)
E. Select the "
returned to the original OSD window.(user's operating condition)
F. The setting data of the CONTRAST, BRIGHTNESS, ROTATION, COLOR TEMPERATURE are common
mode saved in the memory. Don't needed adjust it individual at every timing Mode and save in the memory.
3. White Balance, Luminance adjustment:
Save 6500C color
Save 9300C color
V-Focus
VLIN Balance
V Linearity
H Linearity
Bottom Corner
TOP Corner
" RETURN function and press the MENU Key, then the Factor Preset window will be
Parallelogram
Trapezoid
Pincushion
Rotation
V- Center
V-size
H-Center
H -size
14
17” CDT Color Monitor 107B7
A. Press MENU Key to show OSD menu ,and press the down Key to select the "zoom" function, then press
the menu Key to enter second menu, press the down key to select “
“above 10S,then enter into factory
setting area for modulation.
B. Brightness & contrast ratio MAX.
C. Raster Max modulation: Raster Pattern, adjust R or B bias and G2, make x=270±10, y=290±10, Y=2.0±0.2
2
cd/m
2
D. Raster cut off modulation: Raster Pattern, adjust brightness to make Cut off: 0.08±0.02 cd/m
,and then put
9300K & 6500K into it.
E.Small white screen appears,
(1)Choose 4 for LH ,set R or G or B gain, make x=283±15, y=297±15，Y=350±15 cd/m
Raster cut off, set SB as 4
2
,then save it into
9300K color temperature, set R or G or B gain, make x=313±15, y=329±15, Y=300±15,then save it into 6500K
color temperature, set R or G or B gain, make x=332±15, y=347±15, Y=280±15,then save it into 5500K color
temperature, then exit the factory setting area.
(2)Choose 3 for LH,set R or G or B gain, make x=283±15, y=297±15，Y=270±15,then save it into 9300K color
temperature; set R or G or B gain, make x=313±15, y=329±15,Y=250±15,then save it into 6500K color
temperature, set R or G or B gain, make x=332±15, y=347±15, Y=230±15,then save it into 5500K color
temperature, then exit the factory setting area.
(3)Choose 2 for LH,set R or G or B gain, make x=283±15, y=297±15，Y=210±15,then save it into 9300K color
temperature; set R or G or B gain, make x=313±15, y=329±15,Y=200±15,then save it into 6500K color
temperature, set R or G or B gain, make x=332±15, y=347±15, Y=190±15,then save it into 5500K color
temperature, then exit the factory setting area.
(4)Choose 1 for LH,set R or G or B gain, make x=283±15, y=297±15，Y=140±15,then save it into 9300K color
temperature; set R or G or B gain, make x=313±15, y=329±15,Y=130±15,then save it into 6500K color
temperature, set R or G or B gain, make x=332±15, y=347±15, Y=120±15,then save it into 5500K color
temperature, then exit the factory setting area.
F. White screen appears, brightness cut off, set “SB” as 4,adjust AB value, make 9300K color temperature
2
Y=98±1 cd/m
temperature Y=96±1 cd/m
,then save it into 9300K color temperature; set “SB” as 3,adjust AB value, make 9300K color
2
,then save it into 9300K color temperature; set “SB” as 2, adjust AB value, make
9300K color temperature Y=94±1 cd/m2,then save it into 9300K color temperature; set “SB” as 1, adjust AB
value, make 9300K color temperature Y=92±1 cd/m
2
,then save it into 9300K color temperature.
G. White screen appears, brightness cut off, set R or G or B gain, make x=313±10, y=329±10,Y=80±5 cd/m
then save it into sRGB color temperature, exit the factory setting area.
H. After modulation, it’s necessary to check if the white balance accords with the normal specification. If not,
needs reset. then exit factory setting area.
4. Focus Adjustment:
A. Set mode7 1024×768@85Hz with character full page.
B. Under the RECALL state.
2
.
15
17” CDT Color Monitor 107B7
C. Then adjust focus VR1 to a fine vertical line.
D. Adjust focus VR2 to a fine horizontal line.
E. Repeat step C & D,after that ,set the Focus VR,G2 VR with the white lacquer.
5. Purity Adjustment
A. Be sure that the display is not being exposed to any external magnetic fields.
B. Ensure that the spacing between the Purity, Convergence, Magnet, (PCM), assembly and the CRT stem is
29mm. (See below diagram)
C. Produce a complete, red pattern on the display. Adjust the purity magnet rings on the PCM assembly to
obtain a complete field of the color red. This is done by moving the two tabs in such a manner that they
advance in an opposite direction but at the same time to obtain the same angle between the two tabs,
which should be approximately 180'.
D. Check the complete blue and complete green patterns to observe their respective color purity. Make minor
adjustments if needed.
Relative placement of typical components
6. Convergence adjustment
A. Produce a magenta crosshatch on the display.
B. Adjust the focus for the best overall focus on the display.
Also adjust the brightness to the desired condition.
C. Vertical red and blue lines are converged by varying the angle between the two tabs of the 4 pole magnets
on the PCM assembly. (See above diagrams)
D. Horizontal red and blue lines are converged by varying the two tabs together, keeping the angle between
them constant.
E. Produce a white crosshatch pattern on the display.
F. Vertical green and magenta lines are converged by varying the angle between the two tabs of the 6-pole
magnets.
G. Horizontal green and magenta lines are converged by varying the two tabs together, keeping the angle
between them constant.
Purity Magnets
6-pole Convergence Magnets
4-pole Convergence Magnets
Deflection Yoke
16
17” CDT Color Monitor 107B7
4-4 DDC Instructions
128 bytes EDID Data (Hex):
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
0 00 FF FF FF FF FF FF 00 41 0C 1D 00 01 00 00 00
16 01 0F 01 03 68 20 18 78 2B 9E A8 A1 54 46 99 24
32 0E 48 4C A5 EF 00 31 59 45 59 61 59 71 4F 81 80
48 81 59 A9 40 A9 45 EA 24 00 60 41 00 28 30 30 60
64 13 00 36 E6 10 00 00 1E 00 00 00 FF 00 41 55 30
80 35 30 31 30 30 30 30 30 31 0A 00 00 00 FD 00 32
96 A0 1E 56 12 00 0A 20 20 20 20 20 20 00 00 00 FC
112 00 50 48 31 30 37 42 37 0A 20 20 20 20 20 00 2E
Take 105G7 DDC writer for example
1.General
DDC Data Re-programming
In case the main EEPROM with Software DDC which store all factory settings were replaced because a defect,
repaired monitor’ the serial numbers have to be re-programmed.
It is advised to re- soldered the main EEPROM with Software DDC from the old board onto the new board if circuit
board have been replaced, in this case the DDC data does not need to be re-programmed.
Additional information:
Additional information about DDC (Display Data Channel) may be obtained from Video Electronics Standards
Association (VESA). Extended Display Identification Data (EDID) information may be also obtained from VESA.
2.System and equipment requirements
1. An i486 (or above) personal computer or compatible.
2. Microsoft operation system Windows 95/98,etc.
3. Newphl.exe program
4. (105G7)S554BPHL.ddc EDID program.
5. Software DDC Alignment kits shown as fig 1.
The kit contents:
a. DDC board x1
b. Printer cablex1
c. D-Sub cable x1
d. 12V DC input
Note: The Newphl.exe is a MS-DOS -based program, which cannot be run in windows.
17
17” CDT Color Monitor 107B7
D-SUB connector
Printer connector
DC 12V input
Fig 1
Step 1: Put the “Newphl.exe” and “(105G7) S554BPHL.ddc” to a special folder, such as 105G7. And rename the
“(105G7) S554BPHL.ddc” as “W.ddc”
Step 2: Access to MS-DOS program, Input the command as shown fig 2
Note: g: is the disk position for 105G7
Fig 2
18
17” CDT Color Monitor 107B7
Step 3: Press Enter into the next screen as shown Fig 3.
a. Input 14 byte digital Serial No. such as “11111111111111” as shown Fig 3.
b. Enter and press “F3” key to input Serial No. again as shown Fig 4. Enter
The Serial No. length is”14” as shown Fig 4.
c. If you correctly input, there will appear” The Barcode length: 14 is OK” as shown Fig 5.
d. And if you incorrectly input, there will appear “The Barcode length: 9 is NG” as shown Fig 6.
You have to input again.
Fig 3
Fig 4
19
17” CDT Color Monitor 107B7
Step 4: Enter, go into the next screen as shown Fig 7.
Fig 5
Fig 6
Fig 7
20
17” CDT Color Monitor 107B7
Step 5: Enter into Fig 8.
Step 6: Enter into Fig 9.
Fig 8
Fig 9
21
17” CDT Color Monitor 107B7
5. Circuit description
5-1 Micro controller and defl ec ti on cir c ui t
Micro Controller
The micro controller(IC101) core is a 80C51 type. The micro clock frequency of 12 Mhz is derived from the
Xtal oscillator, which is running at 48MHz. The DDC interface is suitable to handle DDC2 by a modified hardware
2
C-bus interface .Standard high current ports,3 ADC pouts with voltage inputs and 4 static standard 8 bit DAC
I
outputs (low interference) and one PWM output for digital control application are implemented. The central
processing unit (CPU) manipulates operands in two memory spaces. These are the 1024byte internal data
memory(consisting of 256 bytes standard RAM and 768 bytes AUX-RAM) and 48K-byte internal program memory .
The program memory of the SAA4849 consists of 48K bytes ROM.
The SAA4849P provides sync. Processing with full auto sync. Capability, a flexible SMPS block and an
extensive set of geometry control facilities. Further the IC generates the drive waveforms for DC coupled vertical
boosters to the TDA4863A.
H/V sync signals processor
The functions of the sync processor include polarity detection, H-SYNC & V-SYNC signals counting,
Programmable SYNC signals output, free running signal generator. Pin52/Pin53 are for the H-SYNC and V-SYNC
input. and the polarity are setting in the positive. When no signal input, the Pin49 will output a 75Hz V-SYNC free
run signal. The Pin18/20will output a 60KHz H-SYNC free run signal. for the monitor testing use.
Reset Circuit(pin23)
There are three ways possible to invoke a reset and initialize the SAA4849 micro controller part:
Via power-on reset circuit
Via watchdog timer overflow(only micro controller reset)
Via deflection reset after start up(only micro controller reset)
The reset pin(pin23) is connected to a Schmitt trigger for nose reduction. A reset is accomplished by holding the
Reset pin HIGH.
C145
5V
22U
+
R153
2.7K
C102
0.1UF
RST Pin23
22
17” CDT Color Monitor 107B7
x-ray protection
The x-ray protection(pin22) input XRAY provides a voltage detector with a precise voltage input for X-ray
protection .If the input voltage at XRAY exceeds the upper threshold for 150us to 300us,the system is forced to
shut down by switching off vertical-and B-drive signals. There are two different ways to handle the system in case
of XRAY occurrence:
1. If the x-ray latch enable bit UCXRAY[2] was set to “0” during startup the system will shut down without any
interference of the uC.The deflection controller is set to ldle mode. Restart of the system only possible due to
seitching power off/power on.
2. If register bit UCXRAY[2] was set to “1”,micro controller interaction is allowed .If the micro controller doesn’t
interrupt the system, the system will shut down to ldle mode. For any interaction of the micro controller the XRAY
occurrence has to be acknowledged by the micro controller by clearing the bit SY-STATUS[2].The micro controller
take over the control of the handling via software. The actual x-ray pin status can be read through bit SY-STATUS[1].
Quartz Oscillator(pin45,pin46)
The quartz oscillator circuit is available on pins XTAL1(input) and XTAL2(output) and works together with an
external 48MHz 3
crystal frequencies than 48 MHz cannot be used.External capacitors on XTAL1 and XTAL2 are not allowed.
rd
overtone quartz. As a result the quartz oscillator is always running on 48MHz.Other quartz
B+ Control Function Block
The B+control block of the SAA4849 has the same behaviour as the TDA4856 with adapted threshol
voltages.The circuit allows the user to choose the trigger edge of the HDRV signal and the polarity of the output
2
stage via I
C-Bus.
The B+ control function block of the SAA4849 consists of an Operational Transconductance Amplifier(OTA), a
voltage comparator,a flip-flop and a discharge circuit. This configuration allows easy application for different B+
control concepts.
HPLL
The horizontal part contains a PLL,which works over the full frequency range from 25kHz to 140 kHz.This range
2
can be reduced by a ower and an upper frequency limit(Write Once Registers HPMAX and HPMIN).Via I
C bus the
number of 48MHz clock cycles is sent through the register. The slewing speed during mode change is also
programmable in a write once register (HSLEW)
After the clocks for the HPLL are switched on, the HPLL starts with a fixed freerunning frequency of 60 kHz.The
H-drive pulses are not active and the start up procedure is inhibited.The default setting of register bit HCONTROL [0]
2
will cause the HPLL to slew ,not switch.to the freerunning frequency defined in the I
C register HPFREE( the default
value is also 60 kHz).Independent on H-syncs which are possibly present.the HPLL will slew to that freerunning
frequency. To achieve an always defined starting point for the startup procedure,this procedure cannot be interrupted.
23
17” CDT Color Monitor 107B7
5-2 Transistor & Diode and IC Circuit
Location Description Function
IC101 SAA4849PS CPU
IC601 TDA4863A Vertical Output IC
IC801 NT6812KG-20019 Video PreAmplifier/OSD IC
IC802 LM2476 Video Output IC
IC901 STR-G5643D
IC902 L7805CV DC to DC IC
C907 150UF/450V
Q911 IRF634B
Q403 2SC5909 Horizontal Output Transistor
Q406 IRF630M/S.T Horizontal Size Transistor
Q410 2SC2120-Y Horizontal linearity Transistor
D901~D904 1N5408 PEC Crtical Safety Component
Q426/Q420/Q427 IRF630M/S.T CS adjust Transistor
D919 F R D 3A/400V 31DF4/I.R
D922 RG-4S Rectifier DIODE
D923 RG-4S
D925 RG-4S Rectifier DIODE
D408 DMV1500MFD
C961 3300PF 250VAC/400VAC Crtical Safety Component
C962/C963/
C964
3300PF 250VAC/400VAC Crtical Safety Component
PWM Combi power MOS IC
Filter capacitance
B+ Transistor
Rectifier DIODE
Rectifier DIODE
Rectifier DIODE
24
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