Diamond View DV154 User manual

iii
Diamond View LCD Monitor
DV154 / DV154B
Manual Contents
Section
1. Engineering Specifications
2. Circuit Operation Theory
3. Alignment procedure
4. Trouble Shooting
5. DV154 Parts List
6. DV154B Parts List
7. Schematic Diagrams
8. Assembly
February 2003
Service Guide

DV154/154B LCD Monitor Service Guide Engineering Specification
1
Table of Contents
1. INTRODUCTION ................................................................................................................................2
2. OPERATIONAL SPECIFICATION..................................................................................................3
2.1 POWER SUPPLY ..................................................................................................................................3
2.2 SIGNAL INTERFACE............................................................................................................................3
2.3 VIDEO PERFORMANCE........................................................................................................................4
2.4 SCAN RANGE......................................................................................................................................4
2.5 PLUG & PLAY DDC2B SUPPORT.......................................................................................................4
2.6 SUPPORT TIMINGS..............................................................................................................................4
3. OPERATIONAL & FUNCTIONAL SPECIFICATION..................................................................5
3.1 VIDEO PERFORMANCE........................................................................................................................5
3.2 BRIGHTNESS ADJUSTABLE RANGE.....................................................................................................5
3.3 ACOUSTICAL NOISE...........................................................................................................................5
3.4 ENVIRONMENT...................................................................................................................................5
3.5 AUDIO PERFORMANCE .......................................................................................................................6
4. LCD CHARACTERISTICS................................................................................................................6
4.1 THE PHYSICAL DEFINITION & TECHNOLOGY SUMMARY OF LCD PANEL ...........................................6
5. USER CONTROLS..............................................................................................................................7
5.1 USER’S HARDWARE CONTROL DEFINITION.........................................................................................7
5.2 OSD CONTROL FUNCTION DEFINITION...............................................................................................7
6. MECHANICAL CHARACTERISTICS ............................................................................................8
6.1 DIMENSION........................................................................................................................................8
6.2 WEIGHT .............................................................................................................................................8
6.3 PLASTIC.............................................................................................................................................8
6.4 CARTON.............................................................................................................................................8
7. CERTIFICATION................................................................................................................................9
APPENDIX: PHYSICAL DIMENSION FRONT VIEW AND SIDE VIEW...................................10

DV154/154B LCD Monitor Service Guide Engineering Specification
2
1. Introduction
This specification describes DV154, a 15.0” analog interface color TFT LCD monitor with speakers
supported.
The display supports up to 1024x768/75Hz resolution & refresh rate and 262,144 colors with dithering.
The features summary is as below,
Feature items Specifications Remark
Panel supplier & Panel type of supplier AUO M150XN05 TN with Film type
Actual Size Diagonal display 15.0" Panel display size
Actual Resolution display XGA(1024x768) Panel display resolution
Viewing Angle (at Contrast Ratio = 10) +/- 60 degrees Horizontal (typ.) 40(up),60(down) Vertical Panel spec
Analog interface with Scaling supported Yes With 15 pin D-sub connector
DVI interface with Scaling supported No N.A.
Video interface with Scaling supported No N.A.
Max resolution mode supported 1024 x 768 at 75Hz
Number of Display Colors supported 262,144 (with dithering) Panel driver is 6 bit
Contrast Ratio 400:1 (typ.)
Luminance 200 cd/m2 (min.) At R,G,B saturated condition (Default “User” color setting)
AC power input Yes 90-264 Volts, 47-63 Hz.
DC power input(with AC power adapter) No N.A.
DPMS supported Yes < 3 watts
LED indicator for power status showed Yes Green/Amber/Non
OSD for control & information supported Yes
Multi-language supported for OSD Yes 8languages
Buttons control supported Yes 6 buttons including 1 monitor power on/off control button.
Flywheel control supported No N.A.
Scaling function supported Yes MRT VZ
Auto adjustment function supported Yes “Auto key” function
DDC function supported(EDID ver. 1.3) Yes DDC2B only
Audio speakers supported Yes
Audio Jack(input connector) supported Yes
Earphone Jack(input connector) supported No N.A.
Microphone function supported No N.A.
Mechanical Tilt base design Yes From 0 to +20 degree
VESA wall mounting design Yes
Mechanical Rotate design No N.A.
Mechanical Lift base design No N.A.
Kensington compatible lock design Yes

DV154/154B LCD Monitor Service Guide Engineering Specification
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2. Operational Specification
2.1 Power supply
Item Condition Spec OK N.A Remark
Input Voltage range Universal input full range 90~264VAC /47~63Hz √
Input Current range 90 ~ 264VAC < 2.0 Arms √
Power Consumption Normal “On” operation < 40 Watts √LED: Green
DPMS DPMS “Off” state < 3Watts √LED: Amber
Inrush Current 110 VAC
220 VAC < 30 A (peak) < 60 A (peak) √Cold-start
Earth Leakage Current 264 VAC/50Hz < 3.5 mA √
Hi-Pot 1. 1500VAC, 1 sec
2. Ground test: 30A, 1sec Without damage < 0.1 ohm √(on-line test) (in-lab test)
Power Line Transient IEC1000-4-4 1KV √
IEC1000-4-5 (Surge) Common: 2KV,
Differential: 1KV √
CCFL operation range 90 ~ 264VAC 4mA ~ 7.5mA √Each connector
CCFL Frequency 90 ~ 264VAC 40KHz ~ 60KHz √
Power cord Color: White or Black
Length: 1800 +/- 20 mm
√Depends on shipping
requirement (99 level)
2.2 Signal interface
Item Condition Spec OK N.A Remark
Signal Cable 15 pin D-Sub Color: White or Black
Length: 1770 +/- 30 mm √Depends on shipping
requirement (99 level)
DVI
√
Pin assignment 15 pin D-sub connector See Note-1 √For 15 pin D-sub
Video input Signal type Separate analog R,G,B √For 15 pin D-sub
Level 700 mV (peak to peak) √
Impedance 75 Ohms +/- 1.5 Ohms √
Sync input Signal type Separate H/V-sync
Composite H/V-sync
(Positive/Negative)
√For 15 pin D-sub
Level Logic High: 2.4V ~ 5.5V
Logic Low: 0V ~ 0.5V
(TTL level)
√Refer to VESA VSIS
Standard V1R1
Impedance Minimum 2.2KΩ(pull down) √10KΩfor application
Sync Pulse Width(SPW) 0.7μs < H-SPW
1H < V-SPW √
Note-1: The pin assignment of 15 pin D-sub connector is as below,
15
610
11 15

DV154/154B LCD Monitor Service Guide Engineering Specification
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Pin Signal Assignment Pin Signal Assignment
1 Red video 9 PC5V (+5 volt power)
2 Green video 10 Sync Ground
3 Blue video 11 Ground
4 Ground 12 SDA
5 Ground 13 H-Sync (or H+V)
6 Red Ground 14 V-sync
7 Green Ground 15 SCL
8 Blue Ground
2.3 Video performance
Item Condition Spec OK N.A Remark
Max. support Pixel rate 80 MHz √
Max. Resolution 1024X768
√
Rise time + Fall time <6.25 ns
(50% of minimum pixel
clock period)
√1024x768 @ 75Hz
(max. support timing)
Settling Time after
overshoot /undershoot < 5% final full-scale value √Refer to VESA VSIS
Standard V1R1
Overshoot/Undershoot < 12% of step function
voltage level over the full
voltage range
√Refer to VESA VSIS
Standard V1R1
2.4 Scan range
Item Condition Spec OK N.A Remark
Horizontal 31 ~ 63KHz √
Vertical 56 ~ 75 Hz √Without Frame buffer
2.5 Plug & Play DDC2B Support
Item Condition Spec OK N.A Remark
DDC channel type DDC2B √
EDID Version 1.3
√Refer to FP557A-MEA
DV154 C212 S/W spec
document to see the
detailed EDID data
definition..
2.6 Support Timings
Input Timing Actual Output
Resolution Horizontal
Frequency (KHz) Vertical Frequency (Hz) Dot Clock Frequency (MHz) Actual display Resolution OK N.A Remark
640x350 31.47(P) 70.08(N) 25.17 1024X675
√DOS
720x400 31.47(N) 70.08(P) 28.32 1024X768
√DOS
640x480 31.47(N) 60.00(N) 25.18 1024X768
√DOS
640x480 37.86(N) 72.80(N) 31.5 1024X768
√VESA
640x480 37.50(N) 75.00(N) 31.5 1024X768
√VESA
800x600 35.16(P) 56.25(P) 36.00 1024X768 √VESA

DV154/154B LCD Monitor Service Guide Engineering Specification
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800x600 37.88(P) 60.32(P) 40.00 1024X768
√VESA
800x600 48.08(P) 72.19(P) 50.00 1024X768
√VESA
800x600 46.86(P) 75.00(P) 49.50 1024X768
√VESA
1024x768 48.36(N) 60.00(N) 65.00 1024X768
√VESA
1024x768 56.48(N) 70.10(N) 75.00 1024X768
√VESA
1024x768 60.02(P) 75.00(P) 78.75 1024X768
√VESA
Note-2: “P”, “N” stands for “Positive”, “Negative” polarity of incoming H-sync/V-sync (input timing)
3. Operational & Functional Specification
3.1 Video performance
Item Condition Spec OK N.A Remark
Resolution Any input resolution modes
which are under 1024X768 1024X786 √
Contrast ratio 400:1 √
Brightness At R,G,B saturated condition
(Default “User” color setting) 250 cd/m2(typ.) 200 cd/m2(min.) √
Response time Rising + Falling time 16 ms(typ.), 23ms(max.) √
Viewing angle At Contrast ratio = 10 R/L: 60 degrees (typ.) √
At Contrast ratio = 10 U: 40 degrees (typ.)
D: 60 degrees (typ) √
CIE coordinate of White (0.31, 0.33) +/- (0.03, 0.03) √
Display colors 262,144 color with dithering √18 bits with
dithering
3.2 Brightness Adjustable Range
Item Condition Spec OK N.A Remark
Brightness adjustable range
At Max. Contrast level &
Full-white color pattern (Max. brightness value –
Min. brightness value)
≧100 cd/㎡
√
3.3 Acoustical Noise
Item Condition Spec OK N.A Remark
Acoustical Noise At 1 meter distance
& “Audio” function disabled ≦40 dB/A √
3.4 Environment
Item Condition Spec OK N.A Remark
Temperature Operating +5 ~ +40 ℃√
Non-operating -20 ~ +60 ℃√
Humidity Operating 20 ~ 80% √Non-condensing
Non-operating 10 ~ 85% √Non-condensing
Altitude Operating 0~3658m (10,000ft)
√Without packing
Non-operating 0~12,192m (40,000ft)
√With packing

DV154/154B LCD Monitor Service Guide Engineering Specification
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3.5 Audio performance
Item Condition Spec OK N.A Remark
Preamp + Power amp
(1)Output power 1 Wrms/CH @ 1KHz √Real output
(2)THD (@ 1W) <10%
√
(3)S/N ratio 40dB
√
Speaker Driver
(1)Nominal impedance 8 ohm
√
(2)Maximum input power 2W/CH
√
(3)Frequency response 12KHz
√
(4)Mean sound pressure level 83 ± 3 dB √
(5)Size 28x 40 mm √
Audio Control
(1)Volume range 0 ~100 levels √
(2)Mute On/Off
√
4. LCD Characteristics
4.1 The Physical definition & Technology summary of LCD panel
Item Condition Spec OK N.ARemark
LCD Supplier AUO √
Panel type of Supplier M150XN05 √
Screen Diagonal 381mm(17.0”) √
Display area Unit=mm 304.128(H) x 228.096(V) √
Physical Size Unit=mm 326(W) x 249.0(H) x 12.05(V) √
Weight Unit=gram 1100 (typ.) √
Technology TN without Film √
Pixel pitch Unit=mm 0.297 x 0.297 √Per one triad
Pixel arrangement R,G,B vertical stripe √
Display mode Normally white √
Support color 262K colors(R,G, B 6-bit data) √

DV154/154B LCD Monitor Service Guide Engineering Specification
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5. User Controls
5.1 User’s hardware control definition
Item Condition Spec OK N.ARemark
Monitor Power button √
Enter button √
Right/Inc. button √
Left/Dec. button √
Exit button √
Auto key button √
Mute button √
Input source select button √
5.2 OSD control function definition
Item Condition Spec OK N.ARemark
Contrast
√See Table 3
Brightness
√
Horizontal Position √
Vertical Position √
Pixel Clock √
Phase
√
Color Temperature C1: 9300
C2: 6500
C3: 5800
User: Separate R,G,B adjustment
√
OSD Position OSD Horizontal position
OSD Vertical position √
Language
6 languages √
OSD Time From 5 sec to 60 sec √
Volume
√
Hot key for Contrast √
Hot key for Brightness √
Hot key for Volume √
Auto adjustment Auto-Geometry/Color √
Information
For input timing √
Mute
√
Input Source select √
* The detailed Firmware functions’ specification, please refer to C212, S/W spec document.

DV154/154B LCD Monitor Service Guide Engineering Specification
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6. Mechanical Characteristics
6.1 Dimension
Item Condition Spec OK N.ARemark
Bezel opening 304.1x228.1 mm √Refer to Table 6
Monitor without Stand L x W x H mm 354.1 x 316 x 64.5 mm √
Monitor with Stand L x W x H mm 354.1 x 190 x 361 mm √
Carton Box (outside) L x W x H mm 440 x 416 x 135 mm √
Tilt and Swivel range Tilt : 0/+20 degree √
6.2 Weight
Item Condition Spec OK N.ARemark
Monitor (Net) 3.5 Kg √
Monitor with packing (Gross) 4.7 Kg √
6.3 Plastic
Item Condition Spec OK N.ARemark
Flammability UL 94-HB
√
Heat deflection To ABS 65 ℃√
UV stability ABS Delta E < 8 √MPR2/TCO
Resin MPR2 : ABS
(VW55/VE0856/D350) √
Texture MT11020
√
Color Pearl White
√
6.4 Carton
Item Condition Spec OK N.ARemark
Color
Kraft √
Material
B Flute √
Compression strength 360 KGF √
Burst Strength 16KGF/cm2 √
Stacked quantity 15 Layers √

DV154 /154B LCD Monitor Service Guide Engineering Specification
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7. Certification
Item Condition Spec OK N.ARemark
Environment Green design API Doc. 715-C49 √ISO14000
Requirement
Blue Angel German Standard √
E-2000 Switzerland
√
EPA USA Standard
√
EN61000-3-2 Harmonics √
TCO92/95
√
TCO99
√
PC-Monitor Microsoft Windows PC98/99 √
DPMS VESA
√
DDC 2B Version 1.3 √
USB External √
Safety UL (USA) UL 1950 3rd edition √
CSA (Canada) C22.2 No. 950-M95 √
FIMKO EN60950
√
IEC950 √
EN60950 √
73/23/EEC
√
CB √
TUV/GS EN60950
√
CCIB (China) √
EIAJ/JEIDA (Japan) √
EMC CE Mark 89/336/EEC √
FCC (USA) Class B √
EN55022 Class B
√
CISPR 22 Class B √
VCCI (Japan) Class B √
BSMI (Taiwan) √
C-Tick (Australia) AS3548 √
X- Ray Requirement DHHS (21 CFR) USA X- Ray Standard √
DNHW
√
PTB German X- Ray standard √
MPRII
√
MPRIII
√
Ergonomics ZH1/618 German ergonomic
√
ISO 9241-3 -7 & 8 √

DV154/154B LCD Monitor Service Guide Engineering Specification
10
Appendix: Physical Dimension Front View and Side view
FIG. 1 PHYSICAL DIMENSION FRONT VIEW AND SIDE VIEW

DV154/154B LCD Monitor Service Guide
Circuit operation theory
1
I. Introduction:
The DV154 is a 15" XGA (1024x768) 18 bits color TFT LCD monitor with multi-media function. It’s
an analog interface LCD monitor with a 15 pins D-sub signal cable and it’s compliant with VESA
specification to offer a smart power management and power saving function. It also offers OSD menu
for users to control the adjustable items and get some information about this monitor, and the best
function is to offer users an easy method to set all adjustable items well just by pressing one key, we
called it “i-key”(intelligent key) which can auto adjusting all controlled items. DV154 also offer DDC2
function to meet VESA standard. DV154 offers audio function with 2 speakers.
II. Block diagram
The DV154 consists of a head and a stand (base). The head consists of a LCD module with 2 lamps,
a power board (include AC/DC, DC/DC, inverter and panel power), a control board and interface BD.
The block diagram is shown as below.

DV154/154B LCD Monitor Service Guide
Circuit operation theory
2
III. Circuit operation theory:
A.) HEAD:
A-1.) Interface board diagram:
Interface Board
Red
Green
Blue
Vsync
Hsync
(/H+V)
PC_Hsyn
A/D
&
Scaling
&
OSD
MCU
To
LCD
module
EEPROM
SCL
SDA
SYNC INV
Vblank
VBLANK
(a) Circuit operation theory:
Abasic operation theory for this interface board is to convert analog signals of Red, Green
and Blue to digital signals of Red, Green and Blue. The scaling IC has internal A/D converter,
internal OSD and auto detect input timing functions. A/D converter is convert analog signal to
digital data. OSD is offering adjustable functions to end-user. Detect timing is for detect change
mode. Finally the scaling IC outputs the digital R, G, B data, the H-sync, V-sync, data enable and
pixel clock to TCON (Timing controller). After TCON processing data, data will output to driver
of panel. MCU offers H/W DDC2 function & controls system processing. EEPROM is stored
DDC data, OSD common data and user mode data.
(b) IC introduction:
1.) DDC (Display Data Channel) function: We use MYSON MTV312 to support DDC/2B function.

DV154/154B LCD Monitor Service Guide
Circuit operation theory
3
DDC data is store in 24C04(EEPROM). When MCU working, it will read DDC data from 24C04
then put those data to DDC RAM of MTV312. Those data related to LCD monitor specification.
PC can read them by “SDA” and “SCL” serial communication for I²C communication for DDC2B.
2.) Sync Inverter: we use to tune the PC H-sync and the PC V-sync from PC. H-sync will effect
performance of phase.
3.) Scaling IC: We use MASCOT VZ of MRT .The MASCOT VZ is revolutionary scaling engine,
capable of expanding any source resolution to a highly uniform and sharp image or down scaling
form XSGA, combined with the critically proven integrated 8 bit triple-ADC and patented Rapid-
lock digital clock recovery system. It also support detect mode and DPMS control.
4.) MCU: We use MTV312 control unit, it controls all the functions of this interface board, just
like the OSD display setting, the adjustable items, adjusted data storage, the external IIC
communication, support DDC2B.
5.) EEPROM: We use 24C04 to store all the adjustable data except zoom on/off control, and we
divided it into two parts for the storage of DDC data and user settings.
A-2.) Power board digram:
EM I filter
B ridge R ectifier
and
B ulk filter
Isolation power
Transformer
R ectifier and
filter
R ectifier and
filter
R ectifier and
filter
Inverter circuuit
Audio
A m plifier
circuit
M CU power
and feedback
control
Sw itch
components
PW M controler
Feedbak
Isolator
Fig.1
#1 EMI Filter
This circuit (fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC, VDE,
VCCI standard requirements.

DV154/154B LCD Monitor Service Guide
Circuit operation theory
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Fig. 2
#2 Rectifier and filter
AC Voltage (90-264V) is rectified and filtered by BD601, C605 (See Fig 3) and the DC Output voltage
is 1.4*(AC input). (See Fig.3)
+
2
4
3
1
~
~
-+
C605
BD601TR601
105C
400V
68U
2KBP06MLSCK083
Fig. 3
#3 Switching element and Isolation power transformer

DV154/154B LCD Monitor Service Guide
Circuit operation theory
5
When the Q601 turns on, energy is stored in the transformer. During Q601 turn-off period, the stored energy is delivered to the
secondary of transformer. R607, C607 and D601 is a snubber circuit. R615 is current sense resistor to control output power. (See
Fig.4)
Fig. 4
#4 Rectifier and filter
D702 and C707 are to produce DC output. L702 and C708 are to suppress high Frequency switching spikes. R704 is a
dummy load. (See Fig.5)

DV154/154B LCD Monitor Service Guide
Circuit operation theory
6
++
12
11
5
4
3
R704
C706C705R702
C708
L702
C707
D702F702
1/4W
330
50V
2200P
50V
2200P
1/4W
22
105C
16V
470U
10U
105C
16V
1000U
SB360
(SHORT)
(5A)
5V-FIX
Fig. 5
#5 PWM Controller
The current mode control IC UC3842B is used to control PWM. When the VCC terminal of it gets 16V, IC601 turns on. +5V
will
be set up at Pin8 through soft start circuit, which includes R617, C611, D606 and D605. R616 and C610 generate a fixed
frequency saw-tooth wave at Pin4.

DV154/154B LCD Monitor Service Guide
Circuit operation theory
7
+
+
G
A
K
+
VCC OUT
ISSEN
GNDFBCOMP
R/C
VREF
76
4
3
521
8
+
C610
Q601
R619
R618
R613
R614 R615
R617
R612
R624
C606
C611
C618
C609
ZD602
C614
R610
Q603
C612 C608
R616
IC603
C617
IC601
D605
D606
D604
C613
R620
R623
(PE)
100V
1000P
SSS6N60A
1K
10K
1K
20K .68
100K
47
10K
105C
25V
100U
105C
50V
4.7U
105C
50V
10U
(D)
50V
.022U
24V
(D)
50V
220P
100K
H945
(D)
50V
.1u
(D)
50V
1000P
(1%)
22K
MCR100-6
(OPEN)
105C
50V
10U
3842B
1N4148
1N4148
1N4148
105C
50V
10U
10K
4.7
VCC
Fig. 6
#6 Feedback circuit
PC123 is a photo-coupler and TL431 is a shunt regulation. They are used to detect the output voltage change and be the primary
and secondary isolation. When output voltage changes, the feedback voltage will be compared and duty cycle will be decided to
control the correct output voltage. (See Fig.7)

DV154/154B LCD Monitor Service Guide
Circuit operation theory
8
R
K
A
3
4
2
1
IC702
R622
C711
R712
R709
R711
IC602
TL431
1K
(D)
50V
.1U
(1%)
10K
1/4W
330
(1%)
9.1K
PC123
+5V-FIX
Fig. 7
#7.Audio Speaker:
DC POWER
INPUT
POWER IC
TDA7496
AUDIO
INPUT
Connect with
8 ohm/2W
Speaker
Connect with
PC Audio output
The Audio Speaker is consisting of an Audio board. The Audio Speaker has DC Volume control, use
28mmX40mm Speaker (2W/per channel), power supply from AC-DC board and Audio input from PC Audio
output (Line Out).
(A) Power IC: Use ST POWER IC TDA7496.The IC are stereo Class AB output amplifiers with DC
Volume control. The devices are designed for use in TV and monitor, but are also suitable for battery-
Fed portable recorders and radios. Use +12V from AC-DC Board and connect speaker to offer 1W per
channel.
(B)DC Power Input: To supply +12V to be VCC source Voltage for TDA7496 and built-in AC-DC board.
(C) Audio Input: connect with PC Audio output in 3.5mm to 3.5mm signal line.
(D) Speaker: Use 8 ohm and 28mmX40mm speaker (2W/per channel)
(E) DC Volume Control: The voltage range is 1 – 5 V (From MC)
A-3.) Control board introduction:
The main parts of the control board are a push button, and a led.
(a) Push button: It’s a simple switch function, pressing it for “ON” to do the auto adjustment
function, releasing it for “OFF” to do nothing.

DV154/154B LCD Monitor Service Guide
Circuit operation theory
9
(c) Led: It indicates the DPMS status of this LCD monitor; green light means DPMS on (Normal
operating condition). Amber light means DPMS off (Power off condition).
Inverter Circuit Operation Theory
Block Diagram:
DC Input ON/OFF
Switch
Oscillateion
Circuit
(Royer)
Inverter
transformer CCFL
Protection and
Detecte Circuit
PWM drive and
control Buffer
Brightness and
ON/Off signal
2. General Specification
Input Voltage: 12V
Input Current: 1.5A max.
ON/OFF Voltage: 3.3V
PWM Duty: 3.3V/47KHz
Output Requirement:
Max. Output Current: 15mA
Min. Output Current: 8mA
Lamp Working Voltage: 600Vrms
Open Lamp Voltage: 1000Vrms
Frequency: 47KHz
3.Inverter Circuit Operation Theorem
3.1 PWM controller