JC186VA13U Datasheet PDF - ETC


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JC186VA13U
ETC

Part Number JC186VA13U
Description Service Manual
Page 30 Pages

JC186VA13U datasheet pdf
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JC186VA13U Service Manual
TABLE OF CONTENTS
PAGE
1. PRECAUTION AND NOTICES ------------------------------------------------------------------------------------- 1~2
1.1. SAFETY PRECAUTIONS ---------------------------------------------------------------------------------------- 1
1.2. PRODUCT SAFETY NOTICE ----------------------------------------------------------------------------------- 1
1.3. SERVICE NOTES-------------------------------------------------------------------------------------------------- 1
2. SERVICE TOOL & EQUIPMENT REQUIRED---------------------------------------------------------- 2
3. SPECIFICATIONS ----------------------------------------------------------------------------------------------------- 2~4
3.1. PRODUCT SPECIFICATIONS------------------------------------------------------------------------------ 2
3.2. FACTORY PRESET MODE TIMING CHART ---------------------------------------------------------- 3
3.3. D-SUB CONNECTOR -------------------------------------------------------------------------------------------- 4
4. EXPLODED VIEW AND PARTS LIST --------------------------------------------------------------------------- 5~6
4.1. EXPLODED VIEW ------------------------------------------------------------------------------------------------ 5
4.2. EXPLODED VIEW PARTS LIST-------------------------------------------------------------------------------- 6
5. BLOCK DIAGRAM ---------------------------------------------------------------------------------------------------- 7
6. SCHEMATIC DIAGRAM -------------------------------------------------------------------------------------------- 8~21
6.1. ADC ----------------------------------------------------------------------------------------------------------------- 8
6.2. TP6732 ------------------------------------------------------------------------------------------------------------- 9
6.3. MPU ---------------------------------------------------------------------------------------------------------------- 10
6.4. SAA7118 ----------------------------------------------------------------------------------------------------------- 11
6.5. VX1520 ------------------------------------------------------------------------------------------------------------- 12
6.6. SDRAM ------------------------------------------------------------------------------------------------------------- 13
6.7. AUDIO -------------------------------------------------------------------------------------------------------------- 14
6.8. PANEL INTERFACE --------------------------------------------------------------------------------------------- 15
6.9. POWER ------------------------------------------------------------------------------------------------------------ 16
6.10. TUNER ------------------------------------------------------------------------------------------------------------- 17
6.11. KEYPAD & IR ----------------------------------------------------------------------------------------------------- 18
6.12. YpbPr --------------------------------------------------------------------------------------------------------------- 19
6.13. AC POWER -------------------------------------------------------------------------------------------------------- 20
6.14. TRANSFER -------------------------------------------------------------------------------------------------------- 21
7. WORKING THEOREM----------------------------------------------------------------------------------------------- 22~23
8. PCB LAYOUT ----------------------------------------------------------------------------------------------------------- 24~35
8.1. MAIN PCB TOP VIEW ------------------------------------------------------------------------------------------- 24
8.2. MAIN PCB BOTTOM VIEW ------------------------------------------------------------------------------------- 25
8.3. CON PCB TOP VIEW -------------------------------------------------------------------------------------------- 26
8.4. CON PCB BOTTOM VIEW -------------------------------------------------------------------------------------- 27
8.5. POWER PCB TOP VIEW ---------------------------------------------------------------------------------------- 28
8.6. POWER PCB BOTTOM VIEW ---------------------------------------------------------------------------------- 29
8.7. TUNER PCB TOP VIEW ----------------------------------------------------------------------------------------- 30
8.8. TUNER PCB BOTTOM VIEW----------------------------------------------------------------------------------- 31
8.9. IR PCB TOP VIEW------------------------------------------------------------------------------------------------ 32
8.10. IR PCB BOTTOM VIEW ----------------------------------------------------------------------------------------- 33
8.11. YPbPr PCB TOP VIEW------------------------------------------------------------------------------------------- 34
8.12. YPbPr PCB BOTTOM VIEW ------------------------------------------------------------------------------------ 35
9. TROUBLE SHOOTING FLOW CHART ------------------------------------------------------------------------- 36~37
10. ADJUSTMENT---------------------------------------------------------------------------------------------------------- 38~39
10.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS ------------------------------------------------------- 38
10.2. MAIN ADJUSTMENTS ------------------------------------------------------------------------------------------- 38
10.3. ALIGNMENT PROCEDURES----------------------------------------------------------------------------------- 38
11. ELECTRICAL PARTS LIST ---------------------------------------------------------------------------------------- 40~55
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JC186VA13U Service Manual
1. PRECAUTION AND NOTICES
1.1. SAFETY PRECAUTIONS
This monitor is manufactured and tested on a ground principle that a user's safety comes first.
However, improper use or installation may cause damage to the monitor as well as to the user.
Carefully go over the following WARNINGS before installing and keep this guide handy.
WARNINGS:
u This monitor should be operated only at the correct power sources indicated on the label on
the rear end of the monitor. If you're unsure of the power supply in your residence, consult
your local dealer or power company.
u Use only the special power adapter that comes with this monitor for power input.
u Do not try to repair the monitor yourself as it contains no user-serviceable parts. This
monitor should only be repaired by a qualified technician.
u Do not remove the monitor cabinet. There is high-voltage parts inside that may cause
electric shock to human bodies, even when the power cord is unplugged.
u Stop using the monitor if the cabinet is damaged. Have it checked by a service technacian.
u Put your monitor only in a clean, dry environment. If it gets wet, unplug the power cable
immediately and consult your service technician.
u Always unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth.
Apply non-ammonia based cleaner onto the cloth, not directly onto the glass screen.
u Keep the monitor away from magnetic objects, motors, TV sets, and transformer.
u Do not place heavy objects on the monitor or power cord.
1.2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety visual inspections and
the protection afforded by them cannot necessarily be obtained by using replacement
components rated for higher voltages, wattage, etc. Before replacing any of these components
read the parts list in this manual carefully. The use of substitute replacement parts which do not
have the same safety characteristics as specified in the parts list may create shock, fire, or other
hazards.
1.3. SERVICE NOTES
1. When replacing parts or circuit boards, clamp the lead wires around terminals before
soldering.
2. When replacing a high wattage resistor (more than 1W of metal oxide film resistor) in
circuit board, keep the resistor about 5mm away from circuit board.
3. Keep wires away from high voltage, high temperature components and sharp edges.
4. Keep wires in their original position so as to reduce interference.
5. Usage of this product please refer to also user's manual.
-1-



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JC186VA13U Service Manual
2. SERVICE TOOL & EQUIPMENT REQUIRED
1. SIGNAL GEN.
2. MULTIMETER
3. OSCILLOSCOPE
4. SCREW DRIVER
5. IRON
6. ABSORBER
7. SOLDER
8. DUMMY LOAD (5
/200W)
3. SPECIFICATIONS
3.1. PRODUCT SPECIFICATIONS
LCD Panel
18.1" TFT
Power Management
Energy Star compliant VESA
DPMS compatible
< 5W
Displayable Resolution
XGA 1024×768 max.
Pixel Dimension
0.3585×0.3585mm
LCD Display Color
16.7M Color Max. (8bit)
Viewing Angle
CR 10
Horizontal: -80°+80°
Vertical: -60°+50°
Tilt +90°, -1°
Contrast Ratio
Brightness
350 : 1 (typical)
450 cd/m2 (typical)
Response Time
Tr: 10 ms Tf: 15ms (typical)
Active Display Area
368mm×276mm
RF Tuner
Input level: 0 ~ +15 dB mV
Rang: NTSC 55.25 to 801.25 MHz, 2-69 channels for Off-Air
and 2-125 Channeis for CATV
Power
Voltage: 100~240 V
Consumption: 60 Watts
Speaker
3W×2
-2-



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JC186VA13U Service Manual
3.2. FACTORY PRESET MODE TIMING CHART
ITEM
TIMING
Pixel Rate
H TOTAL
H DISPLAY
H B-Porch
H Width
H Border
V TOTAL
V DISPLAY
V B-Porch
Vs Width
V Border
H/V Sync
Interlace
1
640×480 60HZ
25.175MHZ
31.778us
25.422us
1.907us
3.813us
0.318us
16.683ms
15.253ms
1.049ms
0.064ms
0.254ms
-/-
No.
2
640×480 67HZ
30.240MHZ
28.571us
21.164us
3.175us
2.116us
0.000us
15.000ms
13.714ms
1.114ms
0.086ms
0.000ms
-/-
No.
3
640×480 75HZ
31.500MHZ
26.667us
20.317us
3.810us
2.032us
0.000us
13.334ms
12.800ms
0.427ms
0.080ms
0.000ms
-/-
No.
4
720×400 70HZ
28.322MHZ
31.778us
25.422us
1.907us
3.813us
0.318us
14.268ms
12.710ms
1.111ms
0.064ms
0.254ms
-/+
No.
ITEM
TIMING
Pixel Rate
H TOTAL
H DISPLAY
H B-Porch
H Width
H Border
V TOTAL
V DISPLAY
V B-Porch
Vs Width
V Border
H/V Sync
Interlace
5
800×600 56HZ
36.000MHZ
28.444us
22.222us
3.556us
2.000us
0.000us
17.778ms
17.066ms
0.626ms
0.057ms
0.000ms
+/+
No.
6
800×600 60HZ
40.000MHZ
26.400us
20.000us
2.200us
3.200us
0.000us
16.579ms
15.840ms
0.607ms
0.106ms
0.000ms
+/+
No.
7
800×600 72HZ
50.000MHZ
20.800us
16.000us
1.280us
2.400us
0.000us
13.853ms
12.480ms
0.478ms
0.125ms
0.000ms
+/+
No.
8
800×600 75HZ
49.500MHZ
21.333us
16.162us
3.232us
1.616us
0.000us
13.333ms
12.800ms
0.448ms
0.064ms
0.000ms
+/+
No.
-3-




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