Fujitsu E177 Schematic

GENERAL INFORMATION
ADJUSTMENT
All adjustment are thoroughly checked and corrected when the monitor leaves the factory, but sometimes several adjustments may be required. Adjustment should be following procedure and after warming up for a minimum of 30 minutes.
¥ Alignment appliances and tools.
- Programmable Signal Generator. (eg. VG-819 made by Astrodesign Co.)
- EPROM or EEPROM with saved each mode data.
- Alignment Adaptor and Software.
- Digital Voltmeter.
- White Balance Meter.
- Luminance Meter.
- High-voltage Meter.
AUTOMATIC AND MANUAL DEGAUSSING
The degaussing coil is mounted around the CDT so that automatic degaussing when turn on the monitor. But a monitor is moved or faced in a different direction, become poor color purity cause of CDT magnetized, then
DEGAUSS on the OSD menu.
press
7) DIST. ADJ. BALANCE command.
8) Adjust balance of side-pincushion as arrow keys to be the best condition.
9) DIST. ADJ. BALANCE command.
10)
Adjust parallelogram as arrow keys to be the best condition.
11)
DIST. ADJ. FOS. ADJ command.
12)
Adjust V-SIZE as arrow keys to 230±2mm.
13)
Adjust V-POSITION as arrow keys to center of the screen.
14)
Adjust H-SIZE as arrow keys to 310±2mm.
15)
Adjust H-POSITION as arrow keys to center of the screen.
16)
Adjust S-PCC (Side-Pincushion) as arrow keys to be the best condition.
17)
Adjust TRAPEZOID as arrow keys to be the best condition.
18)
Display from Mode 1 to Mode 5 and repeat above from number
19)
PRESET EXIT Y (Yes) command.
4. Adjustment for White Balance and Luminance.
12)
to
17)
.
ADJUSTMENT PROCEDURE & METHOD
- Install the cable for adjustment such as Figure 1and run
the alignment program on the DOS for IBM compatible PC.
- Set external Brightness and Contrast volume to max position.
1. Adjustment for B+ Voltage.
1) Display cross hatch pattern at Mode 4.
2) Adjust voltage to 160V
2. Adjustment for High-Voltage.
1) Display cross hatch pattern at Mode 4.
2) Adjust FBT B+voltage to 140V
VR701.
3. Adjustment for Factory Mode (Preset Mode).
1) Display cross hatch pattern at Mode 1.
2) Run alignment program for e177, CS777B on the IBM compatible PC.
3) Power button of the monitor turn off
4) COMMAND START Y(Yes) command.
5) DIST. ADJ. TILT command.
6) Adjust tilt as arrow keys to be the best condition.
±
0.5Vdc with VR901.
±
0.5Vdc with
turn on.
1) Set the White Balance Meter.
2) Press the DEGAUSS on the OSD menu for demagnetization of the CDT.
3) Set Brightness and SUB-Brightness to Max position.
4) Display color 0,0 pattern at Mode 4.
5) COLOR ADJ. LUMINANCE command of the
alignment program.
6) COLOR ADJ. BIAS ADJ. command of the
alignment program.
7) Check whether blue color or not at R-BIAS and G­BIAS to min position and B-BIAS to 0.3 Check it's not blue color.
8) Adjust R-BIAS and G-BIAS command to x=0.283
0.01 and y=0.298±0.01 on the White Balance Meter with PC arrow keys.
9)
Adjust SUB-Brightness command to 0.4±0.1FL of the raster luminance.
10)
Display color 15,0 box pattern (70x70mm) at Mode 4.
11)
Set Contrast and SUB-Contrast to max position.
12)
DRIVE ADJ command.
13)
Set B-DRIVE to 2/3 150(96) (decimal) at DRIVE of the alignment program.
14)
Adjust R-DRIVE and G-DRIVE command to white balance x=0.283 White Balance Meter with PC arrow keys.
±
0.003 and y=0.298±0.003 on the
±
0.05FL.
±
15)
220
Monitor to be
adjusted
Video
Signal Generator
IBM Compatible PC
Parallel Port
Power inlet (required)
Power LED
ST Switch
Power Select Switch (110V/220V)
Control Line
Not used
RS232C
PARALLEL
V-SYNC
POWER
ST
VGS
MONITOR
E
E
V-Sync On/Off Switch (Switch must be ON.)
F
F
A
A
B
B
C
C
15
10
5
5
69
1
1
1
14
13
25
6
5V
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Adjust SUB-CONTRAST command to 47±2FL of the color 15,0 box pattern (70x70mm) luminance at mode 4 and save in color 1.
16)
Display color 15,0 full white patten at Mode 4.
17)
COLOR ADJ. LUMINANCE ABL command.
18)
Adjust ABL to 33±1FL of the luminance.
19)
Exit from the program.
5. Adjustment for Focus.
1) Set the Brightness and Contrast to max position.
2) Display H character in full screen at Mode 4.
3) Adjust two Focus control on the FBT that focus should be the best condition.
Figure 1. Cable Connection
EEPROM
OSD
PROCESSOR
KA7808
DEGAUSSING COIL
TILT COIL
TILT
CONTROL
CIRCUIT
D/D CONVERTER
X-RAY
PROTECTION
CIRCUIT
V-OUT
TDA4866
(IC601)
VERTICAL
BLANCKING
BRIGHTNESS
CONTROL
DYNAMIC
FOCUS
CIRCUIT
AUTO BEAM
LIMIT
DEGAUSSING
CIRCUIT
5V
R G B
R G B
6.3V
DY
CDT
12V
12V
75V
8V
125V
8V
H.V
H-DY
V-DY
DYNAMIC FOCUS
FOCUS
SCREEN
G1
RECTIFIER
POWER INPUT
100-240VAC
(50/60Hz)
SMPS
TRANS
(T901)
DIODE
(D901, D902,
D903, D904)
6.3V
160V
15V
11V
160V
KA7805
5V
12V
15V
6.3V
15V
12V
H-DRV
H-SYNC SIG. V-SYNC SIG.
ISC, ISD
B-DRV
F.B.T (T701)
15V
-120V
H-POSITION H-SIZE V-POSITION V-SIZE S.PCC TRAP. PIN BALANCE PARALLELOGRAM ROTATION RECALL DEGAUSS DDC OPTION OSD POSITION INFORMATION HELP ABSENCE MESSAGE COLOR CURVE COLOR RECALL EXIT
BRIGHT CONTRAST
DATA
ISC ISD
ISC ISD
R/G/B/BIAS
R/G/B/
CONTRAST
6.3V
40V
<OSD DISPLAY>
30V
650V
SIGNAL
CABLE
H-SYNC SIG.
V-SYNC SIG.
DATA LINE
CLOCK LINE
CUT-OFF
CONTROL
IC303
VIDEO MAIN AMP
MICOM
MC68HC05BD16
(IC401)
VIDEO
PRA-AMP
(TDA4866)
(IC302)
H-OUT (Q706)
D/D FEEDBACK
DPM
CONTROL CIRCUIT
SMPS CONTROL
IC901
STRF6654
LINE
FILTER
VOLTAGE FEEDBACK
H/V SYNC PROCESSOR
TDA4856 (IC701)
H-LINEARITY
CORRECTION
KA7812
DESCRIPTION OF BLOCK DIAGRAM
1. Line Filter & Associated Circuit.
This is used for suppressing noise of power input line flowing into the monitor and/or some noise generated in this monitor flowing out through the power input line. That is to say, this circuit prevents interference between the monitor and other electric appliances.
2. Degauss Circuit & Coil.
The degauss circuit consists of the degaussing coil, the PTC(Positive Temperature Coefficient) thermistor(TH901), and the relay(RL901). This circuit eliminates abnormal color of the screen automatically by degaussing the shadow mask in the CRT during turning on the power switch. When you need to degauss in using the monitor, select DEGAUSS on the OSD menu.
3. SMPS(Switching Mode Power Supply).
This circuit is working of 90~264V AC(50/60Hz). The operation procedure is as follows:
1) AC input voltage is rectified and smoothed by the bridge diodes (D901~D904) and the capacitor (C907).
2) The rectified voltage(DC) is applied to the primary coil of the transformer(T901).
3) The control IC(IC901) generates switching pulse to turn on and off the primary coil of the transformer (T901) repeatedly.
4) Depending on turn ratio of the transformer, the secondary voltages appear at the secondary coils of the transformer(T901).
5) These secondary voltages are rectified by each diode(D902, D922~D924, D926)) and operate other circuit. (horizontal and vertical deflection, video amplifier, ...etc.)
4. X-ray Protection.
I
f the high voltage of the FBT reaches up to 29kV (abnormal state), Q807 operates and IC401(MICOM) pin 11 come to low level. Then MICOM control IC701 (Deflection controller) to stop Horizontal drive pulse and stop Horizontal Deflection.
6. Horizontal and Vertical Oscillation.
This circuit generates the horizontal pulse and the vertical pulse by taking the H and V sync signal. This circuit consists of the TDA4856(IC701) and the associated circuit.
7. Oscillating Circuit for D/D Converter.
This circuit generates the saw-tooth wave which has the horizontal period by taking output of the TDA4856(IC701).
8. D/D(DC to DC) Converter.
This circuit supplies DC voltage to the horizontal deflection output circuit by decreasing DC 160V which is the secondary voltage of the SMPS in accordance with the input horizontal sync signal.
9. Side-Pincushion & Trapezoid Correction Cirucit.
This circuit improves the side-pincushion and the trapezoid distortion of the screen by mixing parabola and saw-tooth wave to output of the horizontal deflection D/D converter which is used for the supply voltage(B+) of the deflection circuit.
10. Horizontal Deflection Output Circuit.
This circuit makes the horizontal deflection by supplying the saw-tooth current to the horizontal deflection yoke.
11. High Voltage Output & FBT(Flyback Transformer).
The high voltage output circuit is used for generating pulse to the primary coil of the FBT(Flyback Transformer (T701)). A boosted voltage(about 26kV) appears at the secondary of the FBT and it is supplied to the anode, focus, and screen voltage of the CRT.
12. H-Linearity Correction Circuit.
This circuit corrects the horizontal linearity for each horizontal sync frequency.
5. Micom(Microprocessor) Circuit.
The operating procedure of Micom(Microprocessor) and its associated circuit is as follows:
1) H and V sync signal is supplied from the signal cable.
2) The Micom(IC401) distinguishes polarity and frequency of H and V sync.
3) The Micom sets operating mode and offers the controlled data. (H-size, H-position, V-size, ... etc.)
4) The controlled data of each mode is stored in itself.
5) User can adjust screen condition by each OSD function. The data of the adjusted condition is stored in EEPROM(IC402).
13. Vertical Output Circuit.
This circuit takes the vertical ramp wave from the TDA4856(IC701) and performs the vertical deflection by supplying the saw-tooth current to the vertical deflection yoke.
14. Dynamic Focus Output Circuit.
This circuit takes the horizontal and the vertical parabola waves from the TDA4856(IC701) and amplifies it to maintain constant focus on center and corners in the screen.
15. H & V Blanking and Brightness Control.
Blanking circuit eliminates retrace line by supplying negative pulse to the G1 of the CRT. And Brightness circuit is used for control of the screen brightness by changing DC level of the G1.
16. Image Rotation (Tilt) Circuit.
This circuit corrects the tilt of the screen by supplying the image rotation signal to the tilt coil which is attached near the deflection yoke of the CRT.
17. Video Pre-Amp Circuit.
This circuit amplifies the analog video signal from 0-0.7V to 0-4V. It is operated by taking the clamp, R, G, B drive and contrast signal from the Micom(IC401).
18. Video Output Amp Circuit.
This circuit amplifies the video signal which comes from the video pre-amp circuit and amplified it to applied the CRT cathode.
MAIN
FBT
CONTROL
89
10
1
23
4567
CONTROL LOCATIONS
NO.
1
2
3
4
5
Ref. No.
SW211
VR212
VR211
SW213
SW215
Control Function
POWER BUTTON
CONTRAST
BRIGHTNESS
EXIT BUTTON
OSD SELECT/ADJUSTMENT
NO.
6
7
8
9
10
Ref. No.
SW214
SW212
VR101
VR701
VR901
Control Function
OSD SELECT/ADJUSTMENT(UP)
ENTER BUTTON
TCO ADJUSTMENT
HIGH-VOLTAGE ADJUSTMENT
B+ADJUSTMENT
5. CONTROL BOARD (Component Side)
6. CONTROL BOARD (Solder Side)
3. VIDEO BOARD (Component Side)
4. VIDEO BOARD (Solder Side)
DISASSEMBLY
P902, P903
P701
P704
P401
P101
P102
P501
Anode Cap
P304
1. TILT/SWIVEL REMOVAL
1) Set the monitor face downward.
2) Pressing the latch (a), carefully remove the Tilt/Swivel by pulling it upward.
(a)
2. BACK COVER REMOVAL
1) Remove two screw caps (a).
2) Remove four screws (b).
3) Slide the Back Cover away from the Front Cabinet of the monitor.
(b)
(a)
(a)
(b)
3. TOTAL CHASSIS ASSEMBLY REMOVAL
1)
Remove connector (a) from the DY Assembly screw.
2) Disconnect P304 (GND Wire) and two pins (b) from the Video PCB.
3) Carefully separate the CDT Board Assembly from the CDT neck.
4) Discharge the remaining static electricity by shorting between the Anode Cap and the CDT ground.
5) Disconnect the Anode Cap from the CDT.
6) Disconnect P902, P903 (Degaussing pin), P701 (DY pin), P101, P102, P401, P501, and P704 from the Main PCB.
7) Remove two screws (c).
8) Remove the Total Chassis Assembly from the Main Frame.
(c)
(a)
(b)
(b)
(c)
4. CONTROL PCB ASSEMBLY REMOVAL
P301
P303
P302
1) Remove three screws (a).
2) Remove the Control PCB Assembly from the Front Cabinet Assembly.
6. BOTTOM BRACKET REMOVAL
1) Remove two screws (a).
2) Remove three screws (b).
3) Remove the Bottom Bracket.
(a)
(a)
(b)
(b)
(b)
(a)
5. VIDEO PCB ASSEMBLY REMOVAL
1) Disconnect P301, P302, and P303 from the Video PCB.
2) Remove three screws (a).
3) Remove the Video PCB Assembly from the Interface Assembly.
(a)
(a)
(a)
(a)
(a)
7. MAIN BRACKET REMOVAL
1) Remove seven screws (a).
2) Remove two screws (b).
3) Release six latches (c).
4) Remove the Main Bracket.
(a)
(c)
(a)
(a)
(a)
(b)
(a)
(b)
(a)
(a)
(c)(c)
EXPLODED VIEW
18
10
A
2
3
4
5
B
6
7
8
9
11
13
14
15
16
12
C
1
25
22-1
22-2
23
24
20
21
17
D
19
- 33 -
EXPLODED VIEW PARTS LIST
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22-1
22-2
23
24
25
A
B
C
D
Part No.
3091TKC023G
3091TKC023H
2423GC0B89Z
339-002H
6868T17003C
6140TC3001A
4815TKV006E
6871TVH101A
4920TKP015A
4815TKV007K
4950TKS063A
6174Z-1012B
407-S29H
6200TJB001D
407-T73D
407-T98M
4920TKC003K
4940TKC008G
4810TKM024E
407-T83A
4950TKS062B
332-102N
3550TKK016E
3550TKK016F
3809TKC011M
332-122B
3043TKK029F
3141TZZ036A
6871TVT103A
6871TMT108A
6871TST109A
Description
CABINET ASS'Y, FOR FUJITSU e117
CABINET ASS'Y, FOR MikroMikko e117
CDT, M41LFQ803X 46NLAA
SCREW ASSÕY, PHP+5x20+GW18
CDT EARTH
DEGAUSSING COIL
SHIELD ASSÕY, VIDEO FRONT
PCB ASS'Y, VIDEO
PLATE, HEAT SINK FOR IC303
SHIELD ASSÕY, VIDEO REAR
METAL, REAR
FBT, FMMTC61
PLATE, HEAT SINK FOR Q719
AC SOCKET
PLATE, HEAT SINK FOR IC901
PLATE, HEAT SINK FOR IC601
COMPRESS, HEAT SINK FOR D704, Q709, Q706
KNOB, ROTARY CONTROL
BRACKET, MAIN
PLATE, SHIELD FOR FBT
METAL, BOTTOM
SCREW, PTP+4x25
SCREW COVER, RIGHT
SCREW COVER, LEFT
BACK COVER ASSÕY
SCREW, TP1+M4x16
TILT SWIVEL ASSÕY
CHASSIS ASS'Y, TOTAL
PCB ASS'Y, VIDEO TOTAL
PCB ASS'Y, MAIN TOTAL
PCB ASSÕY CONTROL TOTAL
Q'ty
1
1
4
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
1
4
1
1
1
1
1
Material
LGC LUPOY GN5001F UL94-5V
SPTE-C (t=0.3)
SPTE-C (t=0.3)
SBHG1-A (t=1.0)
AL (t=2.0)
AL (t=2.0)
AL
AL
LGC ABS AF 303S UL94-V0
LGC LUPOY GN5001F UL94-5V
SBHG1-A (t=1.0)
LGC LUPOY GN5001F UL94-5V
HIPS 60HR UL94-HB
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