ViewSonic Corporation P76f+-2
1
Confidential-Do Not Copy
(P76f+-2_SM_884 Rev. 1a – Apr. 2006)
ViewSonic
“
381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Service Manual
ViewSonic P76f+-2
Model No. VS11262
17” Digital Controlled Color Monitor
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
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Copyright
Copyright © 2005 by ViewSonic Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed , stored in a retrie val system , or translat ed into an y language or com puter
language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or
otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the contents
hereof and specifically disclaims any warrant y of m erchantability or fitness for any p articula r purpo se. Fur ther,
ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents
hereof without obligation of ViewSonic to notify any person of such revision or changes.
Trademarks
Optiquest is a registered trademark of ViewSonic Corporation.
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Revision History
Revision SM Editing Date ECR Number Description of Changes Editor
1a 04/24/06
Initial Release DCN-4484
Eric
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TABLE OF CONTENTS
1. Precautions and Safety Notices·······························································································1
2. Specification·····························································································································3
3. Front Panel Function Control Description ················································································6
4. Circuit Description··················································································································10
5. Adjustment Procedure············································································································13
6. Troubleshooting Flow Chart···································································································17
7. Block Diagram························································································································24
8. Schematic Diagrams··············································································································30
9. PCB Layout Diagrams············································································································34
10. Exploded Diagram and Exploded Parts List·········································································36
11. PPL ······································································································································38
12. Recommended Spare Parts List···························································································39
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1. Precautions and Safety Notices
WARNING!
This service information is designed for experience repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service
a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians.
Any attempt to service or repair the product or products dealt within this service information by anyone else
could result in serious injury or death.
1. CAUTION
No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly
familiar with all of the following safety checks and servicing guide lines.
2. SAFETY CHECK
Care should be taken while servicing this CRT display because of the high voltage used in the deflection circuits.
These voltages are exposed in such areas as the associated flyback and yoke circuits.
3. FIRE & SHOCK HAZARD
3-1 Insert an isolation transformer between the CRT display and AC power line before servicing the chassis.
3-2 In servicing pay attention to original lead dress especially in the high voltage circuit. If a short circuit is found,
replace all parts, which have been overheated as a result of the short circuit.
3-3 All the protective devices munt be reinstalled per original design.
3-4 Soldering must be inspected for possible cold solder joints, frayed leads, damaged insulation, solder splashes or
sharp solder points. Be certain to remove all foreign material.
4. LEAKAGE CURRENT COLD CHECK
4-1 Unplug the AC cord and connect a jumper between the two prongs on the plug.
4-2 Turn the CRT display power switch “on”.
4-3 Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metallic part on
the CRT display such as the metal frame, screwheads, control shafts, etc. When the exposed metallic part has a
return path to the chassis, the reading should be 1.8 megohm minimum.
5. LEAKAGE CURRENT HOT CHECK
5-1 Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during this check.
5-2 Connect a 1500 ohm, 10 watt resistor, paralleled by a 0.15uF capacitor between each exposed metallic part and a
good earth ground (as shown in Fig.1).
5-3 Use an AC voltmeter with 1000 ohm/volt or more sensitivity and measure the AC voltage across the
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combination 1500 ohm resistor and 0.15uF capacitor.
5-4 Move the resistor connection to each exposed metallic part and measure the voltage.
5-5 Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement.
5-6 Voltage measured must not exceed 7.5 volt RMS, from any exposed metallic part to ground A leakage current
tester may be used in the above hot check, in which case any current measured must not exceed 5.0 milliamp. In
the case of a measurement exceeding the 5.0 milliamp value, a rework is required to eliminate the chance of shock
hazard.
Note： High voltage is present when this CRT display is operating. Always discharge the anode of the picture tube to the
display chassis to prevent shock hazard.
AC VOLTMETER
Fig. 1
6. IMPLOSION PROTECTION
Picture tubes are equipped with an integral implosion protection system, but care should be taken to avoid damage and
scratching during installation. Use only Panasonic replacement picture tubes.
7. X-RADIATION
WARNING：The only potential source of X-Radiation is the picture tube. However when the high voltage circuit is
operating properly there is no possibility of X-Radiation problem. The basic precaution which must be exercised is to
keep the high voltage at the following factory-recommended level.
Note
It is important to use an accurate periodically calibrated high voltage meter.
7-1 The procedure for adjusting high voltage is shown on page 12.
7-2 If can not be adjust 25.0 KV at immediate service is required to prevent the possibility of premature
component failure.
7-3 To prevent X-Radiation possibility it is essential to use the specified picture tube
There are special components used in this CRT displays that are
important for safety. These parts are identified by the international
symbol
on the schematic diagram and on the replacement parts
list. It is essential that these critical parts should be replaced wit
h
manufacture’s specified parts to prevent X-RADIATION, shock, fire,
or other hazards. Do not modify the original design or this will voi
d
the original parts and labor guarantee.
IMPORTANT SAFETY NOTICE
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2. Specification
1. CRT: 43.2CM (17") 90 Deflection, Shadow Mask, Pure flat tube, 25mm Neck, and 0.25mm Dot Pitch, Anti-Glare
and Anti-Static
2. Viewable image Size: 40.62CM (16") diagonal
3. Display Color: Unlimited Colors
4. External Controls:
Power On/Off, OSD key, Function knob: Contrast, Brightness, Degauss, Horizontal Size, Horizontal Position, Vertical
Position, Vertical Size, ZOOM, Pincushion, Trapezoid, Pincushion Balance, Parallelogram, Rotation, Color
Temperature, Horizontal Moire, Vertical Moire, Tilt, ViewMatch Color (9300k, 6500k, 5000k, User), ViewMeter,
OSD Position, Memory Recall, Languages.
5. Input Video Signal
Timing #1 #2 #3 #4 #5 #6
Resolution
640*480(VGA)
640*480
640*400(VGA)
800*600 800*600 1024*768
V(Hz)
59.943 70.008 70.000 75.000 85.061 75.029
Timing
#7 #8(MAC) #9(MAC) #10 #11 #12(VGA)
Resolution
1024*768 1024*768 1152*870 1280*1024 1280*1024
1600*1200(VGA)
V(Hz)
84.997 75.000 75.00 75.00 85.00 75.00
6. Display Size
Horizontal Display Size, Primary Preset 310 mm +/- 3 mm
Horizontal Display Size, Other Presets 310 mm +/- 4 mm
Vertical Display Size, Primary Preset 230 mm +/- 3 mm
Vertical Display Size, Other Presets 230 mm +/- 4 mm
Display Size Adjustment All preset modes shall expand to full screen size.
7. Scanning Frequencies
Horizontal: 30KHz ~ 97KHz
Vertical: 50 Hz ~ 160 Hz
8. Factory Preset Timings: 12
User Timings: 10
9. Misconvergence
A Zone: 0.25 mm Max.
B Zone: 0.35 mm Max.
10. Video Bandwidth: 260 MHz
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11. Power Source:
Switching Mode Power Supply
AC 90 ~264V, 50/60 Hertz
12. Operating Temperature: 0°C to 40°C Ambient
13. Humidity: 5% to 95% Relative, Non-Condensing
14. Dimensions and Weight
Monitor Packaging
Width
410 mm
455 mm
Height
355 mm (Not Including Base)
530 mm
Depth
424 mm
540 mm
Footprint Width
258 mm
Footprint Depth
258 mm
Monitor W eight
Net:15.0kg(33.1lb)
16.8 kg (37.0lb)
15. External Connection:
15 Pin D-sub Connector
AC Power Cord
16. Power Consumption Modes :
ON Mode <75W typical (Green LED)
ACTIVE OFF <2W(Orange LED)
Power off <1W
17. Regulatiory and Safety
North America
Regulatory Filing
Regulatory filing should be made under the “VS11262”
determined by Compliance Engineering.
China
CCC, CB
International
TCO’03
Power Management
Power Management EPA reversion 4.0 / 2006 tier-II
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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:
15 - Pin Color Display Signal Cable
Pin No. Description Pin No. Description
1.
RED
9.
5V From PC
2.
GREEN
10.
Sync GND
3.
BLUE
11.
NC
4.
GND
12.
SDA
5.
GND
13.
HORIZ. SYNC
6.
GND-R
14.
VERT. SYNC (＊VCLK)
7.
GND-G
15.
SCL (DDC CLOCK)
8.
GND-B
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
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3. Front Panel Function Control Descriptions
Adjusting the Screen Image
Use the buttons on the front control panel to display and adjust the OSD controls .The OSD controls are explained at the top of
the next page and are defined in “Main Menu Controls” on page 8.
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OSD Lock Settings
You have the option of using the On Screen Display (OSD) locking feature, OSD LOCK, to prevent unwanted changes
to the current image settings.
• OSD Lock: Press and hold the [1] button on the face of the monitor for 10 seconds. The message "OSD LOCK" will then
display briefly, indicating that the OSD image settings are now locked.
• OSD Unlock: Press and hold the [1] button again for 10 seconds. The message "OSD UNLOCK" will then display
briefly, indicating that the OSD image settings are now unlocked.
Do the following to adjust the screen image:
1 To display the Main Menu, press button [1].
2 To select a control you want to adjust, press the arrow buttons on the front control panel of your monitor and scroll
through the choices. When the desired control is highlighted, press button [2].
NOTE: Some controls on the Main Menu are listed in pairs, such as Contrast/Brightness. Display control screen (sample
shown in step 3 below). Press button [2] to toggle to the next control in the pair.
3 To adjust the setting, such as CONTRAST in the sample below, press the arrow buttons.
4 To save the adjustment and Exit the menu press button [1] twice.
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Main Menu Controls
Adjust the menu items shown below by using the up and down buttons.
Control Explanation
Brightness adjusts the background black level of the screen image
ZOOM expands and contracts the entire screen image
Horizontal Position moves the screen image left or right.
Vertical Size adjusts the height of the screen image.
Horizontal Size adjusts width of the screen image.
Vertical Position moves the screen image up or down.
Pincushion curves the vertical sides of the screen image.
Pin Balance curves the vertical edges of the screen image to the left or right.
T rapezoi d adjusts the top and bottom of the screen image until they have equal length.
Parallel slants the vertical edges of the screen image until they are parallel.
Tilt rotates the entire screen image.
Contrast adjusts the difference between the image background (black level)
and the foreground (white level).
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Control Explanation
Degauss removes the build-up of magnetic fields that can cause irregular colors to
appear around the edges of screen images. There are two ways to degauss the display:
automatically by turning the monitor on, or manually by selecting the Degauss
control from the menu. With Degauss selected from the menu, press button [2] to
degauss the monitor manually.
Important: Do not degauss repeatedly. Doing so can be harmful
to the
display. Wait at least 20 minutes (before selecting this control again.
ViewMatch® Color
p
rovides several color options: several preset color temperatures and Use
r
Color which allows you to adjust red (R), green (G), and blue (B). The factory setting for this
product is 9300K (9300° Kelvin).
9300K — Adds blue to the screen image for cooler white (used in most office settings with
fluorescent lighting).
6500K — Adds red to the screen image for warmer white and richer red.
5000K — Adds blue and green to the screen image for a darker color.
User Color — Individual adjustments for red, green, and blue.
Moire reduces interference patterns that appear as ripples, waves, or unwanted backgroun
d
color textures. Interference patterns of this type are most noticeable when viewing images
having closely spaced lines or finely detailed patterns.
Language allows you to choose from among several languages for the menus and
control screens: English, French, German, Italian, and Spanish.
Memory Recall returns adjustments to the original factory settings if the display is operating
in a factory preset timing mode listed in this user guide.
E
xception: This control does not affect changes made with the User Color control.
OSD Position allows you to move the on-screen display menus and control screens.
ViewMeter displays the frequencies (horizontal and vertical) coming from the graphics
card of the computer.
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4.Circuit Description
4-1 Micro Controller And Deflection Circuit
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 I
2
C-bus
interface .Standard high current ports,3 ADC pouts with voltage inputs and 4 static standard 8 bit DAC 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 programmemory of the SAA4848
consists of 48K bytes ROM.
The SAA4848P 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
E-STV9383.
H/V sync signals processor
The functions of the sync processor include polarity detection, H-SYNC & V-SYNC signals counting, and
Programmable SYNC signals output, free running signal generator. Pin52/Pin53 are for the H-SYNC and V-SYNC input.
And the polarities 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 SAA4848P 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.
2.7K
R153
+
22U
C145
0.1UF
C102
5V
RST Pin23
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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
rd
overtone quartz. As a result the quartz oscillator is always running on 48MHz.Other quartz crystal
frequencies than 48 MHz cannot be used. External capacitors on XTAL1 and XTAL2 are not allowed.
B+ Control Function Block
The B+control block of the SAA4848P 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 stage via I
2
C-Bus.
The B+ control function block of the SAA4848P 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 25 kHz to 140 kHz. This range can
be reduced by a ower and an upper frequency limit (Write Once Registers HPMAX and HPMIN).Via I
2
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] will
cause the HPLL to slew, not switch. to the freerunning frequency defined in the I
2
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.
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4-2 Transistor & Diode Circuit And IC
Item Part Location Part T ype Part Description
1
IC101 CPU SAA4849PS
2
IC102 EEPROM M24C08-WBN6P
3
IC601 Vertical Output IC E-STV9383
4
IC801 Video PreAmplifier IC LM1246DKA/NA/NOPB
5
IC802 Video Output IC LM2476
6 IC901 Main Power IC TEA1507P
7 IC903 Linear Regulator L7805CV
8 Q901 PowerMosFET STP9NK70Z
15
Q403 H-Out Transistor 2SC5909
16
Q911 B+ Transistor 2SJ584LS
17
Q417 CS mosfet CEPF630
Q417 CS mosfet IRF630B
18
Q418 CS mosfet CEPF630
Q418 CS mosfet IRF630B
19
Q416 CS mosfet IRF630B
Q416 CS mosfet FQP10N20C
20
Q420 CS mosfet CEPF630
Q420 CS mosfet IRF630B
21
Q406 Size control Mosfet IRF630M
22
D919 Rectifier DIODE BYV26C
D919 Rectifier DIODE SBYV26C
23
D918 Rectifier DIODE 31DF4-FC
24
D923 Rectifier DIODE SB240
25
D922 Rectifier DIODE BYV27-200
D922 Rectifier DIODE BYV27-200
26
D930 Rectifier DIODE BYV27-200
27
D916 Rectifier DIODE ER204
28
D408 DAMPER DIODE DMV1500M-AOC
D408 DAMPER DIODE DMV1500MFD
34
C907 Capacitor 150UF+-20% 450V
C907 Capacitor 150UF 450V
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5. Adjusting Procedure
5-1 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.
5-2 Main Adjustments
No. Function Location Designation
1.
B + ADJ PCB - MAIN VR902
2.
SCREEN ADJ FLY BACK TRANS T402 SCREEN VR
3.
FOCUS ADJ FLY BACK TRANS T402 FOCUS VR1&VR2
4.
ABL ADJ PCB - MAIN AB in factory OSD
-MENU
PCB - MAIN (SW101)
-UP ▲ PCB - MAIN (SW102)
-DOWN ▼ PCB - MAIN (SW103)
5.
FUNCTION ADJ
-SELECT
PCB - MAIN (SW104)
5-3 Adjustment Method
1. B + voltage adjustment:
A. Chroma-2000 Signal generator or PC equivalent set mode 1, VGA 640X480 pattern 1.0.
B. Connect a DC Volt meter between TP902 and ground, and then adjusts VR902 to make the B+ is 114 VDC.
2. Factory preset Timings Adjustment:
A. Press
Key to show OSD window press UP or Down Key to switch the functional controls.
B. Press the Up Key to select the "ZOOM" function, and then press the MENU Key. While do not release the MENU
Key until the OSD window changed to the Factory preset window.
C. The Factory preset window contains the following functional controls. Select one of the controls. Then press the
Up/Down Key to adjust its value for the optimum picture.
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CONTRAST
V-LINEARITY
BRIGHTNESS
V-LINEARITY
H-CENTER
R-GAIN
H-SIZE
G-GAIN
V-CENTER
B-GAIN
V-SIZE
R-BIAS
DEGAUSS
G-BIAS
PINCUSHION
R-BIAS
TRAPEZOID
9300
COLOR TEMPERATURE
PIN-BALANCE
6500
COLOR TEMPERATURE
PARALLELOGRAM
50
COLOR TEMPERATURE
ROTATION
OSD EXIT
HD
H-DRIVER COMPENSATION
VG
MAX V-SIZE GAIN RANGE
HG
H-SIZE GAIN
H-MOIRE REDUCE
HS
SUB H-SIZE V-MOIRE REDUCE
TOP CORNER
HL
H-Linearity Modify
BOTTOM CORNER
VF
V-FOCUS ADJUST
HR
V-HV Variation rate adjust
TM
BURN IN TIME
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HM
MAX H-SIZE RANGE
BI
SET BURN-IN
Hs
SUB H-SIZE
Bb
BOTTOM BALANCE
Hb
H-SIZE WAVE BALANCE
Bp
B+ VOLTAGE ADJUST
Tb
TOP BALANCE
AB
ABL
Ec
HV Variation rate adjust
EA
EHT AUTO ADJUST
VG
MAX V-SIZE GAIN RANGE
DC
Video IC dc off set
HG
H-SIZE GAIN
SW
H-frequency select
SB
HIGH BRIGHTNESS SELECT
LH
Brightness Save
RETURN
VO
V-CENTER OFFSET
D. To switches the input signal to the other Timing Mode. Please follow step A ~ C to get the optimum picture.
E. Select the "
" RETURN function and press the MENU Key, then the Factor Preset window will be returned
to the original OSD window.(user's operating condition)
F. The setting data of the CONTRAST, BRIGHTNESS, PIN-BALANCE, PARALLELOGRAM, 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:
A. Press MENU Key to show OSD menu ,and press the down Key to select the "size/center" function, then press the
menu Key to enter second menu, press the down key to select “
”(zoom) about 10S,,then enter into factory
setting area for modulation.
B. Set R,G,B gain DAC value for 50, R ,G ,B bias DAC value for 60.
C. Raster Pattern, Brightness & contrast ratio MAX, fix to G-BIAS, fix to 60. adjust R or B bias, make x=265±10,
y=290±10, adjust G2,make Y=3.5 cd/m
2
,and then adjust brightness, make Y=0.05 cd/m
2
,then save it into
9300K,6500K,5000K color temperature.
D. Adjust R or G or B gain, make x=346±10, y=359±10, Y=150±5 cd/m
2
,then save it into 5000K color temperature.
E. Adjust R or G or B gain, make x=313±10, y=329±10, Y=150±5 cd/m
2
,then save it into 6500K color temperature.
F. Adjust R or G or B gain, make x=283±10, y=297±10, Y=150±5 cd/m
2
,then save it into 9300K color temperature
G. After modulation, it’s necessary to check if the white balance accords with the normal specification. If not, which
needs reset.
4. Focus Adjustment:
A. Under the 1024×768 Fv: 85Hz with character full page.
B. Adjust brightness to center and contrast to max.
C. Then adjust focus VR1 to a fine vertical line.
D. Adjust focus VR2 to a fine horizontal line.
E. Repeat step C & D. then fix the Focus VR, G2 VR.
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
16
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
Purity Magnets
Deflection Yoke
4-pole Convergence Magnets
6-pole Convergence Magnets
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.
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
17
6. Trouble Shooting Flow Chart
6-1-1 No Raster, CRT Relative Circuit Problems
REFER ITEM S.M.P.S.
BRIGHTNESS SET TO MAX. THEN
CHECK CRT G1 VOLTAGE
N
G
N
G
N
G
NG N
G
O
K
O
K
O
K
O
K
O
K
CHECK THE HIGE V OLTAGE
CHECK THE VOLTAGE OF CRT
HEATER ABOU T 6.3V
CHECK VOLTAGE OF THE CRT
CHECK BRIGHTNESS CIRCUIT
Q705 RELATIVE CIRCUIT.
OK
CHECK POWER SAVING CIRCUIT,
"ABNORMAL
H-SYNC, V-SYNC SIGNAL
CHECK SCREE N VOLTAGE ABOUT
LESS THAN 300V
CHECK FBT
CHECK MAIN PCB POWER SUPPLY
CHECK IC101 PIN18 OUTPUT
Q907,Q908,Q909,Q910
CHECK CRT'S HEATER RELATIVE
CIRCUIT Q907, Q908
.
OF CRT ABOUT 24.5~ 25.5KV
400V TO 600V
REFER ITEM 6-2
56V, 14V, 79V,7V(80V FROM FBT)
CATHODE ABOUT 56V TO 65V
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
18
6-1-2.Abnormal Video Level On Screen
OK
N
G
O
K NG N
G
O
K
O
K
CHECK THE VOLTAGE OF IC801
CHECK THE SIGNAL INPUT OF R.G.B.
ABOUT 0.7V
pp
CHECK THE VIDEO OUTPUT OF IC801
R.G.B. APPROACH STANDARD
CHECK SIGNAL CABLE O
R
INTERFACE CARD.
CONTRAST SET MAX.
PIN 10, 18 ABOUT 5V
CHECK 5V RELATIVE CIRCUIT
CHECK THE IC801 PIN 23
RELATIVE CIRCUIT
RELATIVE CIRCUIT
CHECK IC801 PIN 23 CLAMP PULSE
PIN 19, 20, 21 ABOUT 4Vpp,
CHECK IC801 PIN19/PIN20/PIN21
6-1-3. Abnormal DDC (Plug & Play)
OK
N
G
CHECK IC101 PIN 5 VOLTAGE ABOUT 5V
CHECK SIGNAL CABLE
CHECK IC902 GOOD OR FAIL
OR H802 PIN 2
,
4 DATA OUTPUT
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
19
6-2. Abnormal Display
6-2-1.No Signals On Screen
CHECK FBT RELATIVE CIRCUIT
LESS THAN 400V
O
K
N
G
N
G
O
K
O
K N
G
O
K N
G
CHECK THE OUTPUT VOLTAGE
CHECK THE VOLTAGE OF
CHECK THE VOLTAGE OF CRT
CATHODE ABOUT 40Vpp
CHECK THE VOLTAGE OF FBT SCREEN
CHECK THE RELATIVE CIRCUIT
CHECK THE 5V PIN
ON MAIN PCB
RELATIVE CIRCUIT
OF P802 CONNECTOR
ABOUT 400V TO 700V
EXCEED 700V
CHECK FBT & CRT RELATIVE
CHECK VIDEO IC801 VCC ABOUT 5V
OF IC801 PIN 19, 20, 21 ABOUT 3V
pp
CHECK THE IC802
OF IC801 PIN 10/PIN 18 Vcc CIRCUIT
CIRCUIT OR REFER ITEM 6-1
VIDEO AMP ABOUT 80V
CHECK THE 80V RELATIVE CIRCUIT
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
20
6-3. No Blanking
N
G
O
K
CHECK THE RELATIVE
CIRCUIT OF BLANKING
CHECK THE RELATIVE CIRCUIT
CHECK G1 RELATIVE CIRCUIT
CHECK R821 ON VIDEO PCB,
FBT PIN 5 ON MAIN PCB
OF FBT
6-4. Hor./Osc/Def/Hv Circuit Fault
6-4-1. No Raster (Disconnect With Signal Cable)
N
G
O
K
O
K
O
K
N
G
N
G
N
G
CHECK THE COLLECTOR VOLTAGE
CHECK THE COLLECTOR VOLTAGE
RELATIVE CIRCUIT
RELATIVE CIRCUIT
CHECK Q402, T401
CHECK T401
,
T402, Q402, Q403,
ABOUT 3V
pp
OF Q403 ABOUT 1200Vpp AT FH:31KHz
D408, C418, C419, H-DY, B+
CHECK IC101 PIN20 WAVE FORM
CHECK IC101 PIN20
CHECK IC101 PIN 16 ABOUT 5 VDC
CHECK IC101 PIN 5 RELATIVE CIRCUIT
OF Q402 ABOUT 14Vpp
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
21
6-5. Abnormal Horizontal Deflection
6-5-1.Abnormal Horizontal Width Of Video
N
G
O
K
CHECK THE RELATIVE CIRCUIT
CHECK THE RELATIVE
CIRCUIT OF SMPS.
READJUST H-WIDTH FUNCTION
OFQ406
CHECK THE HV OF
CHECK FBT B+ VOLTAGE
CRT ABOUT 25KV
ABOUT 62V AT FH=31KHz
N
G
O
K
6-5-2.Abnormal Horizontal Linearity
AND IC101 PIN9,10,11
CHECK L401, Q426, Q420, Q427
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
22
6-6 Abnormal Vertical Scanning
6- 6-1. Abnormal Vertical Size
OK
N
G
O
K N
G
READJUST V-SIZE FUNCTION VALUE
RELATIVE CIRCUIT
CHECK VERT. OSC CIRCUIT
RELATIVE CIRCUIT
N
G
READJUST V-SIZE FUNCTION VALUE
CHECK THE VOLTAGE OF IC101
RELATIVE CIRCUIT
CHECK IC101 PIN33,34
CHECK THE IC601 PIN1 ABOUT 11.8V
PIN 4 ABOUT -12V
CHECK D601, C605
6- 6-2. Vertical Center
N
G
READJUST V-CENTE
R
RELATIVE CKT
CHECK IC101 AND IC601
6-7 Side-Pin Cushion Distortion
N
G
READJUST
CHECK IC101,
Q
406
RELATIVE CKT.
6-8 Poor Focus
READJUST FOCUS CONTROL
NG
CHECK FOCUS CONTROL UNIT,
FOCUS LEAD WIRE, CRT SOCKET & CRT
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
23
6-9 Power Supply Trouble Shooting Chart
BEFORE CHECK SW.REG. PLEASE REFER TO THE POWER SUPPLY BLOCK DIAGRAM
POWER SUPPLY OUTPUT: (A) VARIABLE OUTPUT: 60V, – 154.5V
(DEPENDING EPENDING UPON H.SYNC FREQUENCY)
(B) CONSTANT OUTPUT: 6.3V, 14V, AND 80V
BEAD SET
ABNORMAL VARIABLE OUTPUT
N
G
O
K
N
G
O
K
O
K
N
G
N
G
O
K
O
K
O
K
N
G
O
K
N
G
YES
N
O
CHECK BRIDGE
RECTIFIED
CHECK START C.K.T
CHECK IC101
CHECK D925
CHECK Q911
Q911 FAILURE
CHECK IC901
CHECK AC LINE
VOLT 120V OR 220
V
CHECK F901, SW901
CHECK LINE RECTIFIED
& SMOOTHED VOLT
CHECK SENSE RESISTENCE
IC901 FAILURE
CHECK T901 O/P
MAKE SURE THAT
THE VARIABLE
O
K
OUTPUT IS NOT SHORTED
R939,R940, D912,ZD903
PIN39,40,41, B+
DRIVER
6.5V CIRCUIT OUTPUT
IC101 PIN30(ABOUT5V)
CHECK 56V, 14.5
V
CHECK THE 56V OUTPUT
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
24
7. Block Diagram
FUNC TION
CONTROL
Q705
BLANKING CIRCUIT
IC802
LM2476 O /P
Q406
PINCUSHION &
H-SIZE CONTROL
IC801
LM1246DK A
PRE.AMP .
Q403,T402(FB T)
HOR.O/P
Q402,T401
HOR. DRIVER
IC601
STV9383
VERT.O/P
EHT
G1 G2 FOCUS
X-R AY PR O TE C TION
24.5KV
H
HV
CRT
R
SIGNAL
CABLE
G
B
R
G
B
V
IC101
SAA4849PS/V1016
CRYSTAL 48M
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
25
IC101
1
2
3
4
52
53
54
5
50
6
7
8 49
9
10
11
13
14
15
16
17
18
19
20
21 36
37
38
39
40
41
42
43
44
45
46
47
48
51
12
55
56
22
23
24
25
26
27
28
35
34
33
32
31
30
29
SwiChoice
ISCL
ISDA
Mute G1
Hs
Vs
DSCL
ROTA
Pro
H-LIN
Unlock
CLAMP VsOUT
CS1
CS2
CS3
OFF
VSSE
VDDD
V5V
VSSD
BDRV
HBGND
HDRV
HFB Iref
Vref
AGND
Bsens
Bin
BOP
Vssa
VDDA
MODE
XTAL1
XTAL2
NC
REM
EEP W/R
standby
DSDA
NC
XRAY
RST
Vfocus
Deguss
ABLadj
KEY2
KEY1
EWdrv
VOUT2
VUOT1
EHT
DouColor
Uvolt
SinColor
IC101 SAA4849
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
26
SAA4849
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
27
IC102
24LC08-BN6
8
5
6
1
2
3
7
4
VCC
ISDA
ISCL
A0
A1
A2
WP
4
E-STV9383
IC601
1
2
3
4 17
18
19
20
5
6
7
8
9
10 11
12
13
14
15
16
-VCC
-VCC
-VCC
OUT -VCCP
-VCC
-VCC
-VCC
Cfly+
CFflyBOOT
Vreg
Feedcap
Freq SGND
IN-
IN+
EAOUT
+VCC
+VCCP
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
28
IC801
LM1246DKA
1
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
VBLK
CAP_A
VDD_1
GND_A
R_IN
G_IN
B_IN
GND-PLL
VCO
5V_PLL
SDA
SCL CAP_D
DA3
DA2
DA1
GND_2
VDD_2
B_OUT
G_OUT
R_OUT
ABL
CLAMP
HBLK
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
29
IC802
LM2476
15
19
17
18
16
2
8
14
3
6
4
1
51310
7
9
12
11
OUTD1
OUTD2
OUTD3
N/C
N/C
VBB
INC3
VCC
IND3
INC1
IND1
IND2
GND
OUTC3
GNDS
INC2
OUTC1
N/C
OUTC2
STR-G5643D
IC901
56C379-504
1
23
4
5
D
SGND
VCC
OCP/FB
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
30
8. Schematic Diagrams
8K2
R146
0.23V
10
R110
4.747V
1K
R152
470
R125
D914
BAV20
5V
+
22U
C145
12V
KeyBoard
小板所需插
PIN
CS1
B+
4K7
R107
240K 1/4W
R967
J78
NC
4700PF
C127
470
R135
39K 1/4W
R969
2200 NC
C108
+
22U 50V
C433
100
R145
J077
NC
0.057V
4.286V
4.801V
4.747V
VR902
2K2
2.4K 1/4W
R155
4K7
R158
80V
J066
NC
HFB
3.9K
R116
100
R172
10K
R126
33K
R141
CS2
2K2
R108
100
C121
CS3
0.1UF
C705
0.1UF
C120
3.283V
4.412V
JUMPER
R447
100
R106
4.802V
CON5_0
H803
GND
DSDA
DSCL
VS
HS
5V
Sense
33PF
C131
2200
C109
4.909V
93C22-48-H
G1
CON5_0
P102
5V/12V
LED
KEY1
KEY2
GND
100
R104
16V
CR
100
R139
51K
R138
4K7
R148
80V
0.01 100V
C702
NC
R115
4.93V
0.276V
0.1UF
C103
4.910V
12V
KEY2
ABL
5V
1/4W
+
100
C110
+
100UF 16V
C113
<SW103>
430 1/2W
R903
80V
75K
R137
100
R140
2SC1213
Q906
4.943V
5.557V
1.353V
M24C08-BN6
IC102
8
5
6
1
237
4
VCC
ISDA
ISCL
A0
A1A2WP
A4
6.2V
ZD102
3.94V
0.47U
C115
3K9
R116
1.8K
R114
+
2.2UF 100V
C128
40V
120K 1/4W
R416
10K
R130
VG
J074
NC
81C3-7-GP
JUMPER
D704
<SW101>
47
R112
BZX55C51
ZD101
2.57V
1.355V
100
R122
4K7
R166
15K
R106
4.94V
2200
C114
4.388V
Jumper
C126
1K
R124
CMPC-B795D-1VSCP
0.1UF/250V
C946
18K
R142
100
R101
5V
33K
R440
5V6
ZD106
100
R164
KEY1
<SW102>
0.144V
0.705V
6.1V
ZD902
100
R105
J022
NC
4.253V
J076
NC
5V
LED
NC
DEG
5V
+
100U 16V
C909
HF
33K
R489
6.2V
ZD103
4.134V
0.535V
0.927V
100
R159
120K
R150
0.046V
240K 1/4W
R420
56C1125-575-X
IC101
1
2
3
4
52
53
54
5
50
6
7
8 49
9
10
11
13
14
15
16
17
18
19
20
21 36
37
38
39
40
41
42
43
44
45
46
47
48
51
12
55
56
22
23
24
25
26
27
28
35
34
33
32
31
30
29
SwiChoice
ISCL
ISDA
CS0HsVs
DSCL
ROTA
Pro
H-LIN
Unlock
CLAMP VsOUT
CS1
CS2
NC
CR
VSSE
VDDD
V5V
VSSD
BDRV
HBGND
HDRV
HFB Iref
Vref
AGND
Bsens
Bin
BOP
Vssa
VDDA
MODE
XTAL1
XTAL2
NC
REM
EEP W/R
standby
DSDA
NC
XRAY
RST
Vfocus
Deguss
HD
KEY2
KEY1
EWdrv
VOUT2
VUOT1
EHT
DouColor
Uvolt
SinColor
0.1UF
C101
VOUT2
KEY1
VDF
470
R151
22K
R183
3.9K
R134
Xray
10000P
C123
5K6
R182
100 NC
R160
4.93V
0.793V
0.925V
5K6
R127
(SW103)
2.282V
HDRV
+
4.7UF
C434
SAA4848
2N2
C116
0.35V
3.3K
R168
6.2V
ZD107
56K
R147
47
R119
5V
3.159V
<SW104>
4.42V
0.1UF
C111
10
R111
470
R129
1K
R162
+
100
C107
1000
C106
56C1133-508
12V
J061
JUMP
100
R118
100
R117
CS0
100
R132
10K
R144
Orange
LED4
3K6
R157
2.2K
R131
0.042V
48MHz
X101
2.527V
Green
LED4
3K6
R156
0.202V
0.974V
UF4004
D929
KEY2
VOUT1
JUMPER
R121
0.1UF
C102
1000C105
XRAY
+
47UF
C100
100
C122
4.94V
100
R120
2.519V
1K
R163
+
10UF 16V
C119
0.284V
0.252V
1UF 50V
C118
6.2V
ZD105
EHT
1N4148
D104
+
220U 16V
C483
ROTA
HD
4.7K
R123
BDRV
100
R149
4.936V
HFB
2200
C124
1K8
R113
33K
R128
6.2V
ZD104
0.846V
470
R154
18K 1/4W
R417
3.043V
J062 NC
47UF
C125 NC
HZ6C2-E
ZD109
120K 1/4W
R161
EWDRV
1500PF 100V
C117
2.7K
R153
+
100UF 16V
C104
5V
H-LIN
2K4
R181
2.431V
100
R143
2K2
R109
2.173V
2K 1/4W
R972
0.4043V
33K
R128
FR103
D102
0.284V
H802
Hfb
12V
ISDA
GND
ISCL
V5V
HFB
VO
HO
6.3V
ABL
G1
80V
GND
1000PF
C130
470K 1/4W
R133
5V
UNLOCK
6.3V
J073
NC
StandBy
100
R102
11K 1/4W
R418
NC
D101
150 1/4W
R705
10K
R149
1.392V
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
31
0
IC802 PIN3
+
150uF/450V
C907
182.5V
31DF4
C945
Q912
R910
91K
5.56V
-12V
D919
93C1060506-52T
+12V
BEAD
FB902
!
1
CPU PIN 52
292V
+
C945
470UF/25V
R909
100 1/4W
10M 1/2W
R900
IC902
TCET 1103
12
43
Q905
2SA733P
Q902
2SC1213C
80.2V
D940
1N4148
+12V
BDRV
+
C910
47UF/16V
1
68K
5.1V
ZD904
CONN
CN903
123
5.12V
D938
SBYV26C
1N4148
D939
Frequency
6
1.8V
C947
100P
68K
C927
220P/2KV
A733
Q920
IC101 PIN20
D930
RGP10D
6.84V
1000P 500V
C914
!
68K
12.1V
6.3V
B+
+
C942
2700UF 16V
+
47u/25V
C929
12
0.47 1/4W
R925
R917
100K 1/2W
11
1N4148
D912
3N3 250V
C963
C933
3.3n
68K
LED1
为单色发光二极管
,POWERSAVING
时为绿闪
;LED2
为双色发光二极管
;
CPU PIN 53
5.78V
2R2
R934
3
+80V
93C52-12J26T
TL431ACZ-AE1
IC904
!
t
PR901
1
注:电压测试条件:输入
:220V/50HZ,H-FREQ:68KHZ,V-FREQ:85HZ;
万用表直流档
Q403 C
IC903
L7805CV
OI
G
OI
G
L903
73C 25810110T
R989
NC
5V
5.17V
!
82K/2W
R927
+
1UF 50V
C935 NC
15R
R938
2SJ584LS
R918
3.3K 1/2W
3V
StandBy
IC801 PIN21
330R
R931
BAV21
D943
IC901 56C625-500-S
TEA1507P
1
2
3
45
6
7
8
VCC
GND
CTRL
DEMAGSENSE
DRIVER
NC
DRAIN
D922
BYV27-200
C925
10n/250V
10K
R982
7
DEGAUSS
2.5V
<40KHZ
68K
4A/250V
F901
+
47UF 250V
C481
R950
150K 1/4W
360k
R937
FB901
BEAD
RGP10D
D911
R974
22K 1/4W
CS TABLE:
+
10U 16V
C967
3K3
D991
!
CN901
1 2
3
68K
+5V
182.5V
R953
5K6 1/2W
56C133-5-ST
68K
TZX842A
ZD901
85Hz
73C253-513-H
L906
47n 50V
C932
C906
0.022U 100V
6K2
R905
AK
G
Q935
BT169B
68K
40KHZ~58KHZ
1M 1/2W
R901
178.2V
R977
200K 1/2W
11.9V
BAV21
D915
14
R970
220K 1/2W
L905
73C 25818110H
100P 50V
C922
8
SW901
0.47 1/4W
R923
!
>58KHZ
4
13
Q403 B
13.7V
115.2V
Q911
57C751-4
G
S D
R922
JUMPER
IC901 PIN1
1
9 OHM
220V
+
C937
470UF/16V
Deg. Coil
10
5.41V
1.4V
+
C930
47UF/160V
27K
R932
1K
R933
t
NR901
61A 58 8
RGP10D
D909
!
5
C908
0.1UF
R914
47
Q907
BC547B
R939
3K3
ER204
D916
!
R951
1K
Q911 G
!
85HZ
+
C931
22U 250V
11.9V
!
CN902
1
2
SSP7NC60
Q901
52.4V
+
+
+
+
+
+
+
+
T901
80C995D-1-L3
5
10
11
9
13
12
14
15
16
8
4
2
6
3
CS1
2
220p/1KV
C920
R913
120K 1/2W
0.1UF
C911
56 2W
R929
240K
R935
D913
NC
0.01 250V
C941
0.47 1/4W
R922
D918
93C6073F
FB903
BEAD
68K
IC101 PIN39
0.47 1/4W
R924
3N3 250V
C962
100
R928
L904
73C 25810110T
220p 50V
C934
L901
73A174-7-HG
142
3
CS2
9
T901 PIN2
+12V
JUMPER
R930
470
R912
+
C944
1000UF/16V
IC601 PIN5
68K
10K
R983
!
R980
220 1/4W
R907
680 1W
85Hz
1K
R936
RY901
4
3
6
5
1
2
!
D937
1N4148
R906
47 1/4W
0
C928
47P/1KV
500V
291V
Q903
2SC945P
2SC945P
Q913
+
C939
1000UF/16V
1.14KV
C961
2n2 250V
2N3904
Q910
Q402 G
R915
2K7 1/2W
!
C919
10n/2KV
10K
R902
ROTA
93C2020-500-52T
GP10J
D910
10 1/4W
R965
BEAD
FB910
58V
R908
15 1/2W
0
68K
+
C936
100UF/100V
R962
47 1/4W
1.3V
C940
1n/500V
11.7V
IC101 PIN34
L902
73C258-181-10H
!
!
150K
R903 NC
1UF/275V
C901
D923
SB240
BYV26C
D936
1N4148
-
+
U4KB80R
BD901
2
134
R916
360
D942
IN5817
0.6KV
P4
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
32
JUMPER
R484
E.H.T
-31.3V
0.22UF 100V
C414
FR107
D463
57C446-500-T
VOUT1
Q406
IRF630M
DMV1500M
D408
H-DY
RY401
4
3
6
5
1
2
3.6 1/4W
R402
+
1000U\25V
C602
B+
0.9V
G2
2.4K
J157
12 11
9
8
79C793-1-LC
T402
1
F1
3
F2
EHT
G2
13
7
4
6
14
2
10
5
57C600-28
NC
C706
0.082uF/250V
C420
3.4V
VG
-12V
3000PF/1.6KV
C419
0.75 3W
R428
FR157S
D706
PH2369
Q404
0.22
C620
220K 1/4W
R488
71C55-503
FB401
75K 1/4W
R749
1/4W
0.1
C619
+
4.7U 16V
C714
139.7V
47P/2KV
C410
C616
4.7nF
NC
R717
1.1K 1/4W
R414
2.2uF/100V
C422
57C419-501-T
CS3
2K2 1/4W
R460
45
NR601
2SC5909
Q403
NC
R451
4K7
R442
+
1UF
C622
15.8V
UF4004
D740
+12V
12V
FR107
D470
0.1
C411
0.91uF/250V
C428
HDRV
2K2 1/4W
R486
V-DY
2N3904
Q401
6K2
R446
CS2
Jumper
R747
47P 1KV
C450
15.9V
4.7U 160V
C436
F2
1K 1/2W
R721
57A419-501-T
9.1K
R620
0.47UF/63V
C417
80V
47K 1/4W
R412
330
R622
1200PF 1.6KV
C472
0.33UF
C612
1K8
R607
2SC945P
0.18uF/400V
C425
4K3
R601
2SD667
Q410
22 1/2W
R427
57C706504
1.8K
R608
10 1/4W
R421
36K
R715
57C493-12-T
57C600-21
100K 1/4W
R471
1500P/100V
C412
C603
4.7nF
7K5 1/4W
R726
22 2W
R723
0.1
C402
10K
R722
3.94V
10 1/4W
R450
VR701
22K
2.2K 1/4W
R487
1K 2W
R426
Q418
CEPF630
HFB
12V
73C253-69-T
L405
26.7V
ER106
D406
110K 1/2W
R741
JUMPER
R463
0.01UF/100V
C401
Q402
BSN254A
39K 2W
R424
57C600-14
EWOUT
+
NC
C712
6.8K
R748
0.1
C416
4K7
R477
BYV26C
D407
NC
R776
4000P/1.6KV
C418
C623
0.22UF
12V
聂广文
2K7
R602
BAV21
D460
VDF
6.8UH
L602
79C167-124-HB
T403
6
1
3
5
4
56C584-501
15.9V
10 1/4W
R475
EHT
CR
CS1
Q416
IRF630B
470 1/4W
R433
58.8V
0.1
C429
100K 1/4W
R449
79C167-500-T
L601
79C167-118-LC
T401
1 6
3 4
5
57C419-501-T
57C419503-T
15.9V
5.1V
ZD701
NC
R445
93C1060-6P-52T
HD
2K2 1/4W
R473
P4
1nF
C605
470 1/2W
R480
Q423
1200PF/1KV
C426
20K
R423
10K
R604
77C260-5-4
11.9V
G1
47K
R485
2200P 500V
C430
2.2nF
C618
JUMPER
R738
1 1W
R401
57C5210-1-T
26.7V
CS0
FR107
D473
0.3V
47PF 2KV
C489
HF
!
<Page Modify Date>
B795D-1VSCP
TOP VICTORY ELECTRONICS(FUJIAN)CO.LTD
MODEL: P/N:
Date:
DRAWER
APPROVED
Electric
Engineer
Engineer
Safety
F1
10 1/4W
R413
0.01V
82PF 2KV
C488 NC
Q417
CEPF630
220K 1/4W
R476
620
R603
Unlock
0.1
C608
56K 1/2W
R740
BF423
Q705
47.8V
4300P 2KV
C480
114V
220K 1/4W
R478
Q408
57C600-14
NC
R713
560P/1KV
C720
BAV20
D701
100K 1/4W
R415
220K 1/4W
R479
22 2W
R455
12V
0.01UF/500V
C740
4700P
C617
150UH
5.1V
ZD726
2K7
R904
10 1/2W
R429
JUMPER
R605
16.8V
51
R621
-183.6V
D409
IN4148
93C220-505
2.2NF/100V
C601
12V
NC
R452
JUMPER
R443
2SC945P
Q422
0.15uF/250V
C423
-11.5V
HZ4C2-E
ZD702
JUMPER
R447
71C55-23
FB403
Q420
CEPF630
2SC945P
48.8V
2SC4002
Q742
100K 1/4W
R435
2SC1213
Q743
NC
C741
+
2.2uF/250V
C713
1.14V
+
100U\100V
C621
4K7 1/4W
R437
VDY
L400
93C39-516-52T
1N5817
D405
270 1/2W
R609
0.1U 50V
C494
JUMPER
R482
-1.9V
2 2W
R606
180K 1/2W
R725
HLIN
16.8V
1N4148
D476
+
10UF 50V
C743
P402
1
2
3
4
VOUT2
-1.06V
JUMPER
R730
73C147-542-H
L401
5
3
2
4
12V
FR107
D474
27K 1/4W
R707
1N4148
D450
0.86V
ABL
10nF
C606
C945
Q412
390
R751
0.1U\50V
C604
1.5 / 1W
R616
57C419-501-T
0.47V
0.01UF 250V
C710
0.33uF/250V
C427
+
1000U\25V
C615
68K 1/4W
R403
226.3V
JUMPER
R411
1.2K
R118
57C498-3-T
82PF 2KV
C490 NC
4K7 1/2W
R459
NC
R483
75 3W
R456
0.86V
2K2 1/4W
R481
2SC945P
Q407
57C600-14
E-STV9383
IC601
1
2
3
4 17
18
19
20
5
6
7
8
9
10 11
12
13
14
15
16
-VCC
-VCC
-VCC
OUT -VCCP
-VCC
-VCC
-VCC
Cfly+
CFflyBOOT
Vreg
Feedcap
Freq SGND
IN-
IN+
EAOUT
+VCC
+VCCP
71C55-29
FB402
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
33
0.033UF
C830
2.81
53A40-8
FB802
0.7
100P/2KV
C836
220P/1KV
C841
R/I
33 1/2W
R829
100P
C812
1UF/100V
C822
4K7
R822
IC802
LM2476
15
19
17
18
16
2
8
14
3
6
4
1
51310
7
9
12
11
OUTD1
OUTD2
OUTD3
N/C
N/C
VBB
INC3
VCC
IND3
INC1
IND1
IND2
GND
OUTC3
GNDS
INC2
OUTC1
N/C
OUTC2
R824
75
330K 1/4W
R844
0.1UF
C832
BAV21
D806
1.3
2.83
IC801
LM1246DKA
1
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
VBLK
CAP_A
VDD_1
GND_A
R_IN
G_IN
B_IN
GND-PLL
VCO
5V_PLL
SDA
SCL CAP_D
DA3
DA2
DA1
GND_2
VDD_2
B_OUT
G_OUT
R_OUT
ABL
CLAMP
HBLK
GND
0.1UF/250V
C829
53A40-8
FB801
FB809
BEAD
2.77
5.0
+
47UF/100V
C811
69.1
71C55-9-T
R846
G/I
1K
R816
1N4148
D803
33C3278-13D
P802
GND
80V
G1
ABL
HT
CLP
VF
HF
X
12V
ISDA
GND
ISCL
5V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1000P/50V
C849
0.1UF
C824
0.1UF/250V
C834
BAV21
D804
FB806
BEAD
4.9
1.19
470P
C837
1K
R813
BAV21
D808
10
R832
+
1UF/100V
C848
GND
70.8
+
22UF
C810
100P
C803
33
R836
330K 1/4W
R819
JUMPER
L805
71C55-9-T
J816
53A40-8
FB803
1.29
470UF/16
C826
4.9
JUMP
L804
150 1/4W
R815
40.3
100P/2KV
C835
GND
+
47UF
C819
470
R809
330K 1/4W
R837
1N4148
D805
0.1UF 250
C831
FB805
BEAD
0.01UF 2KV
C806
0.5
1.21
470
R830
BAV21
D810
560P/500V
C801
FB804
560K 1/2W
0.1UF/250V
C813
750C5X31-1AV
39.3
0.1UF
C816
5.6K
R811
0.1UF 100V
C838
0.01UF/2KV
C852
71.1
0.1UF
C804
2.9
1N4148
D814
10P
C844
0.68uH
R843
39.9
56A366-509
FOCUS
G2
+
0.1UF
C807
JUMPER
R831
100
R802
1N4148
D812
NC
C839
L808
100 1/4W
0.7
2.9
100 1/4W
L809
10P
C842
10
R820
1500
C833
+
47UF/16V
C828
0.1UFC823
100P
C809
1UF/100V
C820
100P/1KV
C851
1K
R814
2.9
SBYV26C
D809
33C3278-6D
P801
1
3
4
5
6
2
3.5
JUMP
R808
100P
C802
0.68uH
R842
3.7
JUMPER
R833
100 1/2W
R804
1.2
3.4
JUMP
R807
10P
C843
0.1UF
C818
5.0
470
R817
R834
75
JUMPER
D801
1.3
0.1UF
C814
33 1/2W
R828
100
R805
1000P/50V
C847
BAV21
D802
100 1/2W
R840
8K2
J819
1.2
600V
78.4
1K
R812
56C551-525
JUMP
R827
!
100PF/1KV
C825
5.0
93C64-501-52T
0.7
BAV21
D807
R826
75
10K
R823
0.06
100 1/4W
L807
33
R821
1N4148
D811
0.1UF
C815
+
47UF/100V
C805
1UF/100V
C821
0.7
8.3
33
R818
1N4148
D813
R
G
B
CRT
CPT 17" RF TINT CRT
11
6
5
789
4K7
R845
+
10UF
C808
B/I
0.1UF/250V
C827
1000P/500V
C846
0.1UF
C817
0.68uH
R841
10
R835
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
34
9. PCB Layout Diagrams
9-1 Main PCB Layout
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
35
9-2 CRT Board Layout
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
36
10. Exploded Diagram and Exploded Parts List
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
37
P76f+-2 Exploded Parts List
Item Part Number Description Q’ty
1 033C4446 F0 T Power Knob 1 PCS
2 W33C4445 F0 T Key Pad 1PCS
3 W33C4445 F0 T OSD Key 1PCS
4 Q34C 985 F0A1T Front panel 1 PCS
5 001C 503503 47 Screw 4PCS
6 750A1697504JAG Degaussing coil 1 PCS
7 715C1451 3 CRT Socket board (video board) 1 PCS
8 085C6027604 CRT Board shield 1 PCS
9 085C6028500 Shield 1 PCS
10 0Q1C 340 16128 Screw M4*16 4 PCS
11 034C 739 F0 1T Back cover 1 PCS
12 0B1C1035 10128 Screw M3.5*10 1 PCS
13 005C600604075S RUBBER WASHER 4 PCS
14 750C5X311AV CRT 1 PCS
15 033C4444 1 POWER LENS 1 PCS
16 715C1576 K 1 PCB 1 PCS
17 034C 824 F0 B SWIVAL 1 PCS
18 034C 741 F0 B BASE 1 PCS
19 006C 31500 RUBBER FOOT 4 PCS
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
38
11.PPL
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
39
12. Recommended Spare Parts List
RECOMMENDED SPARE PARTS LIST(P76f+-2G)
ViewSonic Model Number:
VS11262
Rev: 1a
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
40
P76f+-2G BOM
VIEWSONIC CORPORATION Confidential - Do Not Copy P76f+-2G
41
*Reader’s Response*
Dear Readers:
Thank you in advance for your feedback on our Service Manual, which allows continuous improvement
of our products. We would appreciate your completion of the Assessment Matrix below, for return to
ViewSonic Corporation.
Assessment
A. What do you think about the content after reading P76f+-2 Service Manual?
Unit Excellent Good Fair Bad
1. Precautions And Safety Notices
2. Specification
3. Front Panel Function Control Description
4. Circuit Description
5. Adjusting Procedure
6.Trouble Shooting Flow Chart
7. Block Diagram
8. Schematic Diagrams
9. PCB Layout Diagrams
10. Exploded Diagram and Exploded Parts List
11. Recommended Spare Parts List
B.Are you satisfied with the P76f+-2 service manual?
me tI tnel lecxEdooG riaF daB
1 Service Manual Content
2 Service Manual Layout
3 The form and listing
C.Do you have any other opinion or suggestion about this service manual?
Reader’s basic data:
Name:
Title:
Company:
Add.:
Tel:
Fax:
E-mail:
After completing this form, please return it to ViewSonic Quality Assurance in the USA at facsimile
1-909-839-7943. You may also e-mail any suggestions to the Director, Quality Systems & Processes
(marc.maupin@viewsonic.com)
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