Dell 1700FP User manual

COLOR MONITOR
1700FP
Manual
SERVICE
COLOR MONITOR CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignments & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. Schematic Diagrams

Samsung Electronics Co., Ltd. October 1999
Printed in Korea
Code No.: BN68-00089A

1-1-1 Warnings
1. For continued safety, do not attempt to modify the
circuit board.
2. Disconnect the AC power and DC Power Jack
before servicing.
3. When the chassis is operating, semiconductor
heatsinks are potential shock hazards.
1-1-2 Servicing the LCD Monitor
1. When servicing the LCD Monitor, remove the static
charge by connecting a 10k ohm resistor in series
with an insulated wire (such as a test probe)
between the chassis and the anode lead.
(Disconnect the AC line cord from the AC outlet.)
2. It is essential that service technicians have an
accurate voltage meter available at all times. Check
the calibration of this meter periodically.
1-1-3 Fire and Shock Hazard
Before returning the monitor to the user, perform the
following safety checks:
1. Inspect each lead dress to make certain that the
leads are not pinched or that hardware is not
lodged between the chassis and other metal parts in
the monitor.
2. Inspect all protective devices such as nonmetallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators, etc.
3. Leakage Current Hot Check (Figure 1-1): WARNING:
Do not use an isolation transformer during this test.
Use a leakage current tester or a metering system
that complies with American National Standards
Institute (ANSI C101.1, Leakage Current for
Appliances), and Underwriters Laboratories (UL
Publication UL1410, 59.7).
Figure 1-1. Leakage Current Test Circuit
4. With the unit completely reassembled, plug the AC
line cord directly into a 120V AC outlet. With the
unit’s AC switch first in the ON position and then
OFF, measure the current between a known earth
ground (metal water pipe, conduit, etc.) and all
exposed metal parts, including: metal cabinets,
screwheads and control shafts. The current
measured should not exceed 0.5 milliamp. Reverse
the power-plug prongs in the AC outlet and repeat
the test.
1-1-4 Product Safety Notices
Some electrical and mechanical parts have special
safety-related characteristics which are often not
evident from visual inspection. The protection they give
may not be obtained by replacing them with
components rated for higher voltage, wattage, etc. Parts
that have special safety characteristics are identified by
on schematics and parts lists. A substitute
replacement that does not have the same safety
characteristics as the recommended replacement part
might create shock, fire and / or other hazards. Product
safety is under review continuously and new
instructions are issued whenever appropriate.
1700FP 1-1
1 Precautions
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as
electrical shock.
1-1 Safety Precautions
DEVICE
UNDER
TEST
TEST ALL
EXPOSED METAL
SURFACES
(READING SHOULD
NOT BE ABOVE 0.5mA)
LEAKAGE
CURRENT
TESTER
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED) EARTH
GROUND
!

1-2-1 General Servicing Precautions
1. Always unplug the unit’s AC power cord from the
AC power source and disconnect the DC Power
Jack before attempting to:
(a) remove or reinstall any component or assembly,
(b) disconnect PCB plugs or connectors, (c) connect
a test component in parallel with an electrolytic
capacitor.
2. Some components are raised above the printed
circuit board for safety. An insulation tube or tape
is sometimes used. The internal wiring is
sometimes clamped to prevent contact with
thermally hot components. Reinstall all such
elements to their original position.
3. After servicing, always check that the screws,
components and wiring have been correctly
reinstalled. Make sure that the area around the
serviced part has not been damaged.
1. Immediately before handling any semiconductor
components or assemblies, drain the electrostatic
charge from your body by touching a known earth
ground. Alternatively, wear a discharging wrist-
strap device. To avoid a shock hazard, be sure to
remove the wrist strap before applying power to
the monitor.
2. After removing an ESD-equipped assembly, place it
on a conductive surface such as aluminum foil to
prevent accumulation of an electrostatic charge.
3. Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage
ESDs.
4. Use only a grounded-tip soldering iron to solder or
desolder ESDs.
5. Use only an anti-static solder removal device. Some
solder removal devices not classified as “anti-static”
can generate electrical charges sufficient to damage
ESDs.
4. Check the insulation between the blades of the AC
plug and accessible conductive parts (examples:
metal panels, input terminals and earphone jacks).
5. Insulation Checking Procedure: Disconnect the
power cord from the AC source and turn the power
switch ON. Connect an insulation resistance meter
(500 V) to the blades of the AC plug.
The insulation resistance between each blade of the
AC plug and accessible conductive parts (see
above) should be greater than 1 megohm.
6. Always connect a test instrument’s ground lead to
the instrument chassis ground before connecting the
positive lead; always remove the instrument’s
ground lead last.
6. Do not remove a replacement ESD from its
protective package until you are ready to install it.
Most replacement ESDs are packaged with leads
that are electrically shorted together by conductive
foam, aluminum foil or other conductive materials.
7. Immediately before removing the protective
material from the leads of a replacement ESD,
touch the protective material to the chassis or
circuit assembly into which the device will be
installed.
Caution: Be sure no power is applied to the
chassis or circuit and observe all
other safety precautions.
8. Minimize body motions when handling
unpackaged replacement ESDs. Motions such as
brushing clothes together, or lifting your foot from
a carpeted floor can generate enough static
electricity to damage an ESD.
1 Precautions
1-2 1700FP
1-3 Electrostatically Sensitive Devices (ESD) Precautions
Some semiconductor (solid state) devices can be easily damaged by static electricity. Such components are commonly
called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-
effect transistors. The following techniques will reduce the incidence of component damage caused by static electricity.
1-2 Servicing Precautions
WARNING: An electrolytic capacitor installed with the wrong polarity might explode.
Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions
section of this manual.
Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the
safety precautions, always follow the safety precautions.

2 Product Specifications
2-1 Specifications
LCD Panel TFT-LCD panel, RGB vertical stripe,
normaly black, transmissive, 17-Inch viewable,
0.264 (H) x 0.264 (V) pixel pitch
Scanning Frequency Horizontal : 30 kHz to 81 kHz (Automatic)
Vertical : 56 Hz to 76 Hz
Display Colors 16,7 Million colors
Maximum Resolution Horizontal : 1280 Pixels @ 81 kHz
Vertical : 1024 Pixels @ 76 Hz
Input Video Signal Analog, 0.714 Vp-p ± 5% positive at 75 Ω,
internally terminated
Input Sync Signal Type: Seperate H/V sync, Composite H/V,
Level: TTL level (V high ≥2.0 V, V low ≤0.8 V)
Maximum Pixel Clock rate 135 MHz
Active Display 338 ± 3 mm /
Horizontal/Vertical 270 ± 3 mm
AC power voltage & Freq. AC 90 to 264 Volts, 60/50 Hz ± 3 Hz
Power Consumption 50 W (max.), 45W (norminal)
Dimensions
Unit (W x D x H) 17.3 x 8.7 x 18.1 Inches (440 x 220 x 458.5 mm)
Carton (W x D x H) 22.4 x 22.8 x 12.4 Inches (570 x 580 x 315 mm)
Weight (Net/Gross) 8 kg (17.6 lbs) / 10.4 kg (23 lbs)
Environmental Considerations Operating Temperature : 50°F to 95°F (10°C to 35°C)
Humidity : 20 % to 80 %
Storage Temperature : -4°F to 113°F (-20°C to 45°C)
Humidity : 5 % to 95 %
• 1700FP comply with SWEDAC (MPR II) recommendations for reduced electromagnetic fields.
• Designs and specifications are subject to change without prior notice.
1700FP 2-1
Item Description

2 Product Specifications
2-2 1700FP
2-2 Pin Assignments
Sync
Type
Pin No.
15-Pin D-Sub
Separate Composite
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Red
Green
Blue
GND
DDC Return (GND)
GND-R
GND-G
GND-B
No Connection
Self Raster
GND
Bi-Dr Data (SDA)
H-Sync
V-Sync
DDC Clock (SCL)
Red
Green
Blue
GND
DDC Return (GND)
GND-R
GND-G
GND-B
No Connection
Self Raster
GND
Bi-Dr Data (SDA)
H/V-Sync
Not Used
DDC Clock (SCL)
Pin No.
A1
A2
A3
1
2
3
4
5
6
7
8
9
10
13W3 connector pin assignments
13W3 Side of the Signal Cable
Red
Green
Blue
DDC Clock
NC
Reserved
DDC Return
Composite H/V Sync
No Connection
DDC Data
V-Sync
Reserved
Sync Return / Self-Test

79.976
12.504
1.067
1.837
9.481
0.119
75.025
13.329
0.038
0.475
12.804
0.013
135.000
Positive
Positive
Separate
63.931
15.630
1.037
2.296
11.852
0.444
60.020
16.661
0.047
0.594
16.005
0.016
108.000
Positive
Positive
Separate
1280/60Hz
1280x1024
1280/75Hz
1280x1024
1024/75Hz
1024 x 768
60.023
16.660
1.219
2.235
13.003
0.203
75.029
13.328
0.050
0.466
12.795
0.017
78.750
Positive
Positive
Separate
2 Product Specifications
1700FP 2-3
QRS
P
O
Video
Sync Sync
Horizontal Vertical
CDE
P
O
B
A
Video
Sync Sync
Separate Sync
2-3 Timing Chart
This section of the service manual describes the timing that the computer industry recognizes as standard
for computer-generated video signals.
C D
AO
E
BP
Video
Sync Sync
Video
Q R S
A : Line time total B : Horizontal sync width O : Frame time total P : Vertical sync width
C : Back porch D : Active time Q : Back porch R : Active time
E : Front porch S : Front porch
VIDEO
A
BO
P
QRS
Horizontal Vertical
H/V Composite Sync
31.469
31.777
3.813
1.589
26.058
0.318
70.087
14.268
0.064
0.858
13.155
0.191
28.322
Negative
Positive
Separate
fH (kHz)
A µsec
B µsec
C µsec
D µsec
E µsec
fV (Hz)
O msec
P msec
Q msec
R msec
S msec
Clock
Freq.
(MHz)
Polarity
H.Sync
V.Sync
Remark
IBM
640/75 Hz
640 x 480
800/75 Hz
800 x 600
1024/60Hz
1024 x 768
VGA2/
70 Hz
720 x 400
VGA3/
60 Hz
640 x 480
Table 2-1. Timing Chart
31.469
31.778
3.813
1.589
26.058
0.318
59.940
16.683
0.064
0.794
15.761
0.064
25.175
Negative
Negative
Separate
37.500
26.667
2.032
3.810
20.317
0.508
75.000
13.333
0.080
0.427
12.800
0.027
31.500
Negative
Negative
Separate
46.875
21.333
1.616
3.232
16.162
0.323
75.000
13.333
0.064
0.448
12.800
0.021
49.500
Positive
Positive
Separate
48.363
20.677
2.092
2.462
15.754
0.369
60.004
16.666
0.124
0.600
15.880
0.062
75.000
Negative
Negative
Separate
Mode VESA
Timing

2 Product Specifications
2-4 1700FP
Memo

3-1-1 Removing the Stand
1. With a pad beneath it, stand the monitor on its
front with the screen facing downward and
the base close to you. Make sure nothing will
damage the screen.
2. Working from the back of the monitor remove
the Round Hinge Cover and the Stand Cover.
3. Remove the 6 screws on the Hinge.
Caution: Be careful. The signal cable and
power cable are still attached to the
monitor.
5. Disconnect the Power Cord and Signal Cable.
3-1-2 Main Body Disassembly
1. Remove 4 screws on the Rear Cover.
2. Pull the Rear Cover up and off the monitor.
3. Remove 19 screws on the PCB Shield and
remove the Shield.
4. Remove 5 screws on the Main PCB and 2
screws on the Inverter PCB and 2 screws on
the 10P Harness.
5. Disconnect the interface wire (31P) between
the Panel and the CN2 connector on the Main
PCB.
6. Disconnect the Function PCB wire (10P)
between the Function PCB and the CN10
connector on the Main PCB.
7. Disconnect 2 Inverter wires (12P) between the
Panel and the CN1 connectors on the Inverter
PCB.
8. Carefully lift the Main PCB Assembly and
Inverter PCB and place them on a flat, level
surface that is protected from static electricity.
9. Remove 10 screws on the PCB Bracket.
10. Remove the Bracket Assembly from the Front
Cover.
11. Remove the 2 screws on the Function PCB
from the Front Cover and remove the
Function PCB and Function Knob.
12. Remove 4 screws on the Front Shield and
remove the PCB Bracket and the Front Shield.
1700FP 3-1
3 Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the
1700FP monitor.
WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling
these components.
3-1 Disassembly
Cautions:1. Disconnect the monitor from the power source before disassembly.
2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.
3-2 Reassembly
Reassembly procedures are in the reverse order of Disassembly procedures.

3 Disassembly and Reassembly
3-2 1700FP
Memo

1700FP 4-1
4 Alignments and Adjustments
This section of the service manual explains how to use the DDC JIG to adjust the black, red, green, and blue
levels of the FPD when you replace the AD Board, and how to update the microprocessor when you
change the Panel or Lamp(s).
4-1 Required Equipment
The following equipment is necessary for adjusting the monitor:
• Oscilloscope with probe tool
• Computer with Windows 95 , Windows 98 , or Windows NT .
• 700AS.exe software
• DDC Control JIG
4-2 Using the DDC Control JIG
After replacing the LCD Panel, Lamp(s), and / or AD Board, use the DDC Control Jig to complete your
service. Attach the DDC Control JIG to the flat panel display (FPD) as shown in the diagrams, below.
MONITOR
INTERFACE
BOARD VER. 2.0
PC SIGNAL
GENERATOR
3-WIRE
CABLE
SIGNAL CABLE
5V DC
ADAPTOR
PARALLEL CABLE
Figure 4-1. Setup 1, With Signal Generator
MONITOR
INTERFACE
BOARD VER. 2.0
PC
3-WIRE CABLE
SIGNAL CABLE
PARALLEL CABLE D-SUB
CONNECTOR
5V DC
ADAPTOR
Figure 4-2. Setup 2, Without Signal Generator
R R R

4-2-1 Main Menu
4-2-1 (a) Panel Parameter Control Definitions
4-2-2 Adjustment Procedures
Use the following procedures whenever you
replace the AD Board, Panel, or one or both of the
Lamps.
4-2-2 (a) When Replacing the AD Board
1. Before replacing the AD Board, read all Panel
information data by using the Read button on
the DDC Control Jig.
2. Remove the old AD Board and replace it with
a new board.
3. Perform the procedures described in section
4-2-2 (b).
4. Write the Panel information data to the new
AD Board by using the Write button.
5. Perform other procedures using the DDC
Control Jig, if necessary.
6. When all procedures are complete, select the
Exit button (Item 9) to quit the DDC Control
Jig software.
4-2-2 (b) Color Auto Adjustment
1. After displaying 16-Gray pattern or black and
white mixed pattern, click “Color Auto
Adjustment” button.
2. During normal execution of Auto Algorithm
the screen image may flicker. If Auto
Algorithm does not excute properly, check
DDC Control JIG.
3. After normal execution of Auto Algorithm,
confrim optimal settings by observing the
contrast of several different patterns on the
display.
4-2-2 (c) When Replacing the Panel
1. Select the Read Buffer button (Item 11) to
gather the current information about this
monitor.
2. Increment the number by clicking on the (+)
button on the Panel row in the Change No.
column. If they were not already 00, the
numbers for the Upper and Lower Lamps will
automatically change to 00.
3. Check all values. If there is an error, select
Read Buffer again and increment the Change
No. column to the correct number. When all
values are correct, select the Write button
(Item 12) to record the data in the firmware.
4. Select the Exit button (Item 9) to quit the DDC
Control JIG program.
4-2-2 (d) When Replacing the Upper and/or Lower Lamp
1. Select the Read Buffer button (Item 11) to
gather the current information about this
monitor.
2. Increment the number by clicking on the (+)
button on the Lamp Upper and/or Lamp
Lower row in the Change No. column.
3. Check all values. If there is an error, select
Read Buffer again and increment the Change
No. column to the correct number(s). When all
values are correct, select the Write button
(Item 12) to record the data in the firmware.
4. Select the Exit button (Item 9) to quit the DDC
Control JIG program.
4 Alignments and Adjustments
4-2 1700FP
Monitor On Time Total hours that the monitor has been actively
functioning.
Panel Cycle The total number of times the Panel has been
turned ON.
Time Total in Hours that this Panel or Lamp has been
ON. Reset this number to 000000 after
replacing the part.
Panel Total number of hours that this Panel has
been ON.
Lamp, Upper Total number of hours that this Upper Lamp has
been ON.
Lamp, Lower Total number of hours that this Lower Lamp
has been ON.
Change No. The number of times this Panel or Lamp has
been replaced. The numbers are 00 if the item
is the original factory part installed during
manufacture of this monitor.
Panel Replacement times. This value is 00 if original
equipment.
Lamp, Upper Replacement times. This value is 00 if original
equipment.
Lamp, Lower Replacement times. This value is 00 if original
equipment.
Label Definition
Message Shows the message.

1700FP 5-1
5 Troubleshooting
Notes: 1. Before troubleshooting, setup the PC’s display as below.
• Resolution: 1280 x 1024
• H-frequency: 64 kHz
• V-frequency: 60 Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
• No raster appears: Stand PCB, Main PCB
• 14V develop but no screen: Main PCB
• 14V does not develop: Main PCB
4. If you push and hold the EXIT button for more than 5 seconds, the monitor automatically turns back
to the factory preset.
5-1 No Power
Does proper DC 14 V appear at
DC jack connected to CN101? Check Power Adaptor.
Yes
No
Does proper DC 5 V appear at
Pin 4 of IC101? Check IC101 and related circuit.
Check Q103, Q105 and Q106.
Yes
No
Does proper 5 V - signal appear at
Pin 42 of IC501 (SW_REG_EN)?
Check IC501 and related circuit.
(CN102, Function Key)
Yes
No

5 Troubleshooting
5-2 1700FP
5-2 No Video
Check signal cable and connection.
Check IC201 and related cirmit.
Does the input signal appear at Pin of 76, 77, 78,
80 of IC601 (LDTGB, LVSYNCB, LHSYNCB, LCKBB)
Yes
No
No
Does the analog video signal appear at R211,
R212, R215? (BLUE, GREEN, RED)
(IC201)
Yes
Check IC201, IC206 and related
circuit.
Does the sync signal appear
at the output of Pin 14 of IC201and Pin 3 of IC 206 ?
(V-SYNC, H*V SYNC)
Yes
No
Check the related circuit for these
ports
No
Check IC501 and related circuit.
No
Check IC501 and related circuit.
No
Check IC 300 and related circuit.
No
Does the input signal appear at the Pins 40, 41
of IC 300?
( PLL H*V, MX-PDEN)
Yes
During power on-off, does the input signal
appear at the Pin 29,30 of IC300?
(AD-SDA, AD-SCL)
Do the clok and sync signal appear at Pin 115,
117 of IC 300? (DCLKAB, MX_HSYNC) and
does the digital video signal appear at thr output
port PDA, PDB)?
Yes
During power on-off dose the input signal
appear at the R 407 and R 408 ?
(MX-SDA, MX-SCL)
Yes
7 8
9 10
1 2 3 4
5 6
Does the digital video signal appear
at the Pin 34, 35, 39, 40, 42, 43, 45 and 46 of IC601?
Yes
Is the output of Pin 1, 17 of IC501 High? Check TFT-LCD panel and Inverter.
Yes
Check IC601 and related circuit
No
15 16 17 18
Check IC501 and related circuit.
No

5 Troubleshooting
1700FP 5-3
WAVEFORMS
2
CH1 RMS = 3.25V
3
CH1 RMS = 3.12V
4
CH1 RMS = 2.20V
5
CH1 RMS = 4.96V
6
CH1 RMS = 4.42V
17
CH1 RMS = 3.08V
18
CH1 RMS = 3.08V
9
CH1 RMS = 2.50V
10
CH1 RMS = 960mV
15
CH1 RMS = 3.08V
16
CH1 RMS = 3.08V
8
CH1 RMS = 3.24V
1
CH1 RMS = 3.26V
7
CH1 RMS = 3.20V

5 Troubleshooting
5-4 1700FP
Replace IC404.
Yes
No
There is video but no OSD.
5-3 No OSD
While pushing a front control
button does any pulse appear
at Pin 12 of IC404?
WAVEFORMS
Does input signal appear
at the Pins 2, 5 and
10 of IC404?
Check IC405 and related circuit.
Check IC404 and related circuit.
Yes
No
11 12 13
11
CH1 RMS = 4.18V
13
CH1 RMS = 3.26V
12
CH1 RMS = 3.26V

1700FP 6-1
6 Exploded View and Parts List

10 Schematic Diagrams
6-2 1700FP
Memo

1700FP 6-1
6 Exploded View and Parts List

10 Schematic Diagrams
6-2 1700FP
Memo