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JL328/378/408-XP
Service Manual
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REVIEWED BY/審核
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RD（电子部）
RD（机构课）
技术支援课

2
JL328/378/408-XP
Service Manual

3
TABLE OF CONTENTS
1. Precautions and Safety Notices ································· 4
2. Specification ················································· 5
3. Front Panel Function Control Description ························· 12
4. Adjusting Procedure ········································· 18
5. Trouble Shooting Flow Chart ·································· 22
6. Exploded Diagram and Spare Parts List ·························· 32
7. Block Diagrams ·········································································37
8. Schematic Diagrams ·····························································38
9. PCB Layout Diagrams ·········································55

4
1. Precautions and Safety Notices
Prior to using this service manual,please ensure that you have carefully followed all the procedures outlined in
the user's manual for this product.
(1) Read all of these instructions.
(2) Save these instructions.
(3) Follow all warnings and instructions a marked on the product.
(4) Unplug this product from the wall outlet before cleaning.Do not use liquid cleaners or aerosol cleaners, use
a damp cloth for cleaning.
(5) Do not use this product near water.
(6) Do not place this product on an unstable cart,stand or tablle.The product may fall,causing serious
damage to the product.
(7) Do not tear up the EMI label, if the label has been destroyed,that must to past same size label on the same
position.
(8) Slots and openings in the cabinet and the back or bottom are provided for ventilation,to ensure reliable
operation of the product and to protect it from overheating,those openings must not be blocked or
covered.The openings should never be blocked by placing the product on a bed,sofa, rug, or other similar
surface.This product should not be placed in a built-in installation less proper ventilation is provided.
(9) This products should be operated from the type of power source indicated on the marketin label. If you are
not sure of the type of power available, consult your dealer or local power company
(10) This product is equipped with a 3-wire grounding type plug,a plug having a third (grounding) pin. This
plug will only fit into a grounding-type power outlet. This is a safety feature, if you are unable to insert the
plug into the outlet, contact your electrician to replace your obsolete outlet. Do not defeat the purpose of
the grounding-type plug.
(11) Pay attention to the code which connects with apheliotropism board of inside panel.and don’t hook it.
(12) Do not allow anything to rest on the power cord.Do not locate this product where persons will walk on the
cord.
(13) If an extension cord is used with this product,make sure that the total of the ampere ratings on the
product plugged into the extension cord to the waplugged into outlet does not exceed 15 ampere.
(14) Never push objects of any kind into this product through cabinet slots as they may touch dangerous
voltage points or short out parts that could result in a risk of fire or electric shock.Never spill liquid of any
kind on the product.
(15) Do not attempt to service this product yourself,as opening or removing covers may expose you to
dangerous voltage points or other risks.Refer all servicing to service personnel.
(16) Unplug this product from the wall outlet and refer servicing to qualified service personnel under the
following conditions :
a. When the power cord or plug is damaged or frayed.
b. If liquid has been spilled into the product.
c. If the product has been exposed to rain or water.
d. If the product does not operate normally,when the operating instructions are followed.Adjust only those
controls that are covered by the operating instructions since improper adjustment of other controls may
result in damage and will often require extension work by a qualified technician to restore the product to
normal operation.
e. If the product has been dropped or the cabinet has been damaged.
f. If the product exhibits a distinct change in performance,indicating a need for service.

5
2. Specification
328XP Panel
Item Specifications
Display pixels 1366 (H) x 768 (V)
pixels ( 1 pixel = 1 RGB cells )
Display Area 708.954mm(H) x 398.592mm (V)
Pixel Pitch 0.1730 (H) x 0.5190 (V)mm
Display Colors 16.7M
Pixel Arrangement R+G+B vertical stripe
Display Mode Normally Black Mode
Brightness 550nits
Contrast Ratio 1000:1 typical
Brightness Uniformity 75% min.
Viewing Angle ±88° (H), ±88°(V) Typical at CR ≧20
Color Saturation NTSC 75%
Color Chromaticity (CIE) White: x =0. 285 , y= 0.293
Frame Rate 50Hz/60Hz
Response Time 8ms typical
Surface Treatment AG,3H
378XP Panel:
Item Specifications
Panel Name AUO
Panel Model No. T370XW01
Display pixels 1366 (H) x 768 (V) pixels ( 1 pixel = 1 RGB cells )
Display Area 819.6mm (H) x 460.89mm (V)
Pixel Pitch 0.6mm
Display Colors 16.7M
Pixel Arrangement R+G+B vertical stripe
Brightness 500nitstypical
Contrast Ratio 1000:1 typical
Viewing Angle ±88° (H), ±88°(V) Typical at CR ≧10
Color Chromaticity (CIE) White: x= 0.280 , y =0. 290
Response Time 8ms (Gray to Gray)
Surface Treatment Hard-Coating (3H), Anti-Glare, Reflectance < 2%

6
408XP Panel:
Item Specifications
Panel Name SAMSUNG
Display pixels 1366 (H) x 768 (V) pixels ( 1 pixel = 1 RGB cells )
Display Area 885.168mm (H) x 497.664mm (V)
Display Colors 16.7M
Pixel Arrangement R+G+B vertical stripe
Brightness 500nitstypical
Contrast Ratio 1200:1 typical
Viewing Angle ±89° (H), ±89°(V) Typical at CR ≧10
Color Chromaticity (CIE) White: x= 0.280 , y =0. 290
Response Time 8ms (Gray to Gray)
Surface Treatment Haze 40%，Hard-Coating (3H)

INPUT Source :
Connector types
Inputs & Outputs Signals Video Format Video Sound
Main-TV PAL/ SECAM PH Type None
RGB+Y/C+
CVBS(input/output)+
L/R(input/output)
RGB+Y/C+
CVBS(input/output)+
L/R(input/output)
SCART 21pin
RGB+Y/C+
CVBS(input/output)+
L/R(input/output)
RGB+Y/C+CVBS(input
/output)+L/R(input/outp
ut)
SCART 21pin
Video1 + L/R Audio CVBS RCA x 1 RCA x 2(Red, White)
Video2 + L/R Audio CVBS RCA x 1 RCA x 2(Red, White)
S-VIDEO+ L/R Audio Y/C Mini Din 4 Pin RCA x 2(Red, White)
Component1(Y,Pb/Cb,,
Pr/Cr) + L/R Audio 480i.576i.480p,576p.7 20p, 1080i RCA x 3 RCA x 2(Red, White)
Component2(Y,Pb/Cb2,,
Pr/Cr2) + L/R Audio 480i.576i.480p,576p.7 20p, 1080i RCA x 3 RCA x 2(Red, White)
VGA+ L/R Audio Analog RGB VGA15 Pin RCA x 2(White, Red)
HDMI Digital signal HDMI 19Pin
Note:
A. SCART connector
7

B. HMDI connector is a type A receptacle for video/audio mode.
1. TMDS Data 2+ 9. TMDS Data 0- 17. CEC/GND
2. TMDS Data 2 shield 10. Clock + 18. +5V Power
3. TMDS Data 2- 11. Clock shield 19. Hot Plug Detect
4. TMDS Data 1+ 12. Clock -
5. TMDS Data 1 shield 13. CEC
6. TMDS Data 1- 14. NC
7. TMDS Data 0+ 15. DDC CLK
8. TMDS Data 0 shield 16. DDC DATA
C. D-Sub Connector IN. (This function also can provides to HDTV.)
8
D-Sub type Connector pin assignment
1. Red Video 6. Red Ground 11. GND
2. Green Video 7. Green Ground 12. SDA For DDC1/2B
3. Blue Video 8. Blue Ground 13. H-sync.
4. GND 9. +5V from PC 14. V-sync.

5. Vdd from PC for DDC 10. Sync. GND 15. SCL For DDC1/2B
a) RCA jacks are all female type.
b) Mini DIN CNC 4 Pins (SCN570S3NS00000) for S-video, the pin assignment is
described as below:
HDMI
Format DVI 1.0
Level/Impedance 0.5~3.0Vp-p/100 Ohm (Differential),50 Ohm (Single ending)
TMDS Mode Single Link
Frequency Fh = 31~80 kHz
Fv = 50~75 Hz
Maximum Pixel Clock 135 MHz
DDC 1/2B Compliant with Revision 1.0
Connector HDMI x 1
Analog HD15 PC Signal (RGB)
Format R, G, B Analog
Level/Impedance 0.7Vp-p / 75Ω
DDC 1/2B Compliant with Revision 1.0
Sync H/V separate
3V TTL level / 1kΩ
Frequency Fh = 31~80 kHz
Fv = 50~75 Hz
Maximum Pixel Clock 135 Mhz
Connector Mini D-Sub 15 pin (female) x 1
Video (Composite) CVBS Signal
Format NTSC, NTSC4.43, PAL_M, PAL(B,G,H,D,N), SECAM
Level / Impedance 1.0Vp-p / 75Ω
S-Video (Y/C) Signal
Format Y, C
Level / Impedance Y: 1.0Vp-p / 75Ω
C: ±286 mV/ 75Ω
Analog HD15 Video Signal (YPbPr/YCbCr)
Format Y, Pb, Pr or Y, Cb, Cr
Level / Impedance Y: 1.0Vp-p / 75Ω
Pb/Cb, Pr/Cr: 0.7 ±0.035Vp-p / 75Ω
9
1: Ground
2: Ground
3: Y
4: C

10
HDMI Mode
PRESET MODES HDMI
640X480P HDMI 720X480P HDMI 1280X720P HDMI 1280X720P HDMI
1920X1080 HDMI
1920X1080
I
F. V
59.941Hz 59.941Hz 50Hz 59.941Hz 59.941Hz 50Hz
PRESET MODES HDMI
640X480P HDMI 720X480P HDMI 1280X720P HDMI 720X576P HDMI
1920X1080
F. V 60Hz 60Hz 60Hz 50Hz 60Hz
RGB PC Timin
g
STANDARD RESOLUTION V FREQ
Hz H FREQ kHz CLK MHz
VGA 640x480 60 31.47 25.16
VGA 640x480 75 37.5 31.5
SVGA 800x600 60 37.88 40
SVGA 800x600 75 46.9 49.5
XGA 1024x768 60 48.36 65.0
XGA 1024x768 75 60.02 78.75
SXGA 1280x1024 60 64 108
SXGA 1280x1024 75 80 135
MAC 640x480 67 35 30.24
Video & S-Video AV Timing
STANDARD RESOLUTION V FREQ
Hz H FREQ kHz CLK MHz
NTSC 525 60 15.734 12.65
PAL(B,G,H,D,I) 625 50 15.625 14.50
SECAM 625 50 15.625 14.50
NTSC4.43 525 60 15.734 12.65
PAL-M 525 60 15.734 12.65
PAL-N 625 50 15.625 14.50
HDTV (SDTV) Mode
PRESET MODES SDTV
480
I
SDTV
576I SDTV 480P SDTV 576P HDTV 720P HDTV 720P HDTV
1080
I
F. V
60Hz 50Hz 60Hz 50Hz 50Hz 60Hz 50Hz
PRESET MODES HDTV
1080I
F. V 60Hz

Power Source AC100 – 240 V, 60/50 Hz
Sound Output 10W X2, 4Ohm.
Signal Connector Pin Assignment
Pin Assignment Pin Assignment Pin Assignment
1. Red 6. Red Ground 11. Ground
2. Green 7. Green Gro und 12. SDA
3. Blue 8. Blue Ground 13. Horizontal Sync.
4. Ground 9. Not Connected 14. Vertical Sync.
5. Self Test 10. Sync. Ground 15. SCL
11

3. Front Panel Function Control Description
Operation, Adjust and Programming
12

13

14

15

The operation of each OSD controls is described as following table:
16
Main Menu Sub Menu Option Adjustment
Audio System1Press e/fto select the audio system to be I,DK,L or BGAuto
Programme Auto Search Press e/fto search program automatically
Program No Press e/fto display the current program No.
Audio System Press e/fto select the audio system to be I,DK,L or BG
Channel Type Press e/fto select the Channel type to be V,UHF or
Cable.
Channel No. Press e/fto display the prior storage information on the
Tune
Manual Search Press e/fto search channel manually
Fine Tune Press e/fto fine tune the current programme No.
Manual
Search
Name To edit the channel name
Color System Press e/fto select the color system to be
Auto,PAL,SECAM,PAL60,NTSC or N443
Programme Edit Press e/fto edit the progamme
Favourite Programme Set the favorite program
Picture Mode Press e/fto select the Video mode to be Dynamic,
Standard, Mild, Game and User.
Black Extend Press e/fto select the Black Extend to be On or Off
Color Temp. Press e/fto adjust the Color Temperature to be Cool,
Normal, Warm, User. Red, Green, Blue
Color Adjust Press e/fto adjust the Fleshone,Greentone and Bluetone
value
Contrast Press e/fto adjust the Contrast from 0 to 100
Brightness Press e/fto adjust the Brightness from 0 to 100
Saturation Press e/fto adjust the Saturation from 0 to100
Sharpness Press e/fto adjust the Sharpness from 0 to 100
Hue Press e/fto adjust the Hue from 0 to 100(Only for NTSC)
VOLUME Press e/fto adjust the Volume from 0 to 100
Sound Mode Press e/fto select the Sound mode to be Flat, Music,
Movie, Speech or User
Surround Press e/fto select the Surround to be On or OFF
Balance Press e/fto adjust the balance from 0 to 100
100Hz Press e/fto adjust the 100Hz from 0 to100
500Hz Press e/fto adjust 500Hz from 0 to 100
1.5KHz Press e/fto adjust 1.5KHz from 0 to 100
5KHz Press e/fto adjust 5KHz from 0 to 100
10KHz Press e/fto adjust 10KHz from 0 to 100
Clock Press e/fto adjust the current time
Turn Off Press e/fto set the off time

Clock Press e/fto adjust the current time
Turn Off Press e/fto set the off time
Turn On Press e/fto set the on time.
Language Press e/fto select the language to be English, French,
German, Portuguese, Spanish, Polish, Italian or Dutch
OSD Time out Press e/fto select the OSD Timeout to be 15,20, 25, 30,
40sec.
Blue Screen Press e/fto set the Blue Screen to be On or Off
Keypad Lock Press e/fto select the Keypad Lock to be On or Off.
Transparent Press e/fto select the transparent to be On or Off
OSD Reset To return to the factory default
Auto Config. Press e/fto set the auto config.
Manual Config. Press e/fto enter into the option, use the to adjust the
Phase, Clock, H-Position and V-Position
Display Mode Press e/fto select the display mode to be Spectacle, Full,
Original, 4:3, 16:9, 14:9 and Zoom.
Zoom In/Out Set the current image to zoom in /out
Position Press e/fto set the image position on TV screen
Cinema Press e/fto select the Cinema to be On or Off
Noise Reduce Press e/fto set the 3D Noise reduce value
Reset To recall to the factory default
Input Press e/fto select the Source to be
TV,AV1(Scart1),AV2(Scart2),AV3(CVBS),AV4(S-Video),
AV5(YPbPr1),AV6(YPbPr2),AV7(VGA) or AV8(HDMI)
Double Window Press e/fto select the Double window to be
DW1,DW2,OFF
PIP Press e/fto select the PIP to be On or OFF
PIP Input Press e/fto select the PIP source to be
TV,AV1(Scart1),AV2(Scart2),AV3(CVBS),AV4(S-Video),
AV5(YPbPr1),AV6(YPbPr2),AV7(VGA), AV8(HDMI)
Win.Size Press e/fto adjust the window size
Win. Position Press e/fto adjust the window position (only TV)
17

18
4. Adjusting Procedure
ITEM
Program
Menu.
Equipments Requiremen
t
Procedure and SPEC
1 VIDEO adjustment DVD
Video Cable
Play DVD
Set DVD to
interlaced
otpt
Screen is clear and fluent
2
S-VIDEO DVD
S-Video Cable
Play DVD
Set DVD to
interlaced
output
Screen is clear and fluent
3
TV Genertor“FLUKE54200” Send TV source through 54200
Noise Reduce
Adjusts the Noise Reduce to be 3,and
make snow to be lighter
A
djusts the Noise Reduce to be 0,and
make snow to be bad
4
SCART1/SCART2 adjust FLUKE 54200 Set the
FLUKE
54200 to be
Y/C,RGB
and CVBS
Press SOURCE key to select the
SCART1/SCART2
Check if the screen is clear and fluent
Check if the Teletext is normal on the
SCART(CVBS)
5
SCART1/SCART2 check FLUKE 54200 Set the
FLUKE
54200 to be
Y/C,RGB
and CVBS
Check if the screen is clear and fluent
Check if the Teletext is normal on the
SCART(CVBS)
Press any key to be deviate from the
originally value
Display the blue screen without signal
6
SCART Mode wide screen
scale Auto detect FLUKE 54200 Set the
FLUKE
54200 to be
4:3/16:9
Select the SOURCE to be TV/AV1/AV2
/AV3
Selects the Original of Display mode on
the SCREEN menu
Check it is normal that picture Mode is
differentiated automatically
7
Auto Sourcing of SCART FLUKE 54200 Selects the TV
Inserts SCART input cable
Check if it is swatched to the SCART mode
and pull out the SCART cable,Make sure it
will to swatch to the TV mode

19
8
Teletext operation FLUKE 54200 Sets the
Teletext
output
 Selects the Sourceto be
TV/AV1/2(SCART CVBS)/AV3
 Operats Switch Teletext key

Check if
the
teletext is normal
9
DVD
(Y,Pb,Pr1/ Y,Pb,Pr2)
480i.576i.480p.576p.720p
, 1080i
DVD
Component Cable
720p/1080i
DVD Player
Samsung HD-931
Play
DVD(Y,Pr,Pb)
Set the DVD
to
progressive
output
Screen is clear and fluent
10
HDTV
(Y,Pb,Pr1/ Y,Pb,Pr2)
480i.576i.480p.576p.720p
, 1080i
HDTV Receiver
ATSC HDTV Tuner
SAMSUNG
SIR-T165
BS Tuner:
Panasonic
TU-BHD300
Component Cable
Play HDTV
(Y, Pb, Pr)
Screen is clear and fluent
D-VHS Digital HDTV Video Cassette
Recorder
JVC HM-DH30000U
Panasonic NV-DH2
11
VGA
PC
VGA Cable
DVI Cable
PC Mode 1. Selects Source to be AV7(VGA)
2. Each Mode can display normally。If
there is a specific Mode that is not
appropriate after switching ，press
Auto Adjust can automated adjust to
appropriate screen.
12
VGA TV BOX
VGA Cable
Utilize external-connected TV BOX,
watching the TV program; the screen is
clear and fluent.
13
HDMI SAMSUNG
DVD-HD948
QUANTUMDATA802B
T
1. Selects Source to be AV8(HDMI)
2. Each Mode can display normally。
Screen is clear and fluent
14
HDCP Test QUANTUMDATA802B
T 1. Selects SOURCE to be AV8(HDMI)
2. Check the test source with
HDMI/HDCP through the 802BT
source generator,and check if the OSD
displays “PASS”
15
Display Mode test PC
DVD
S-Video cable
Video Cable
Or TV SIGNAL
/FLUKE54200
1. Selects SOURCE to be
TV,AV1,AV2,AV4,AV5,AV6,AV7,AV8
2. Press MENU to adjust Display Mode
3. Check if each Display Mode is normal

20
16
b
NTSC/PAL/SECAM
switch
DVD
S-Video Cable
Video Cable
FLUKE 54200
Play DVD
test disc
VIDEO ESSENTI
A
Set DVD to
interlaced
output
1. Select SOURCE then choose AV3
（VIDEO）or AV4(S-VIDEO).
2. Sending the signal from DVD test disc
(sixth paragraph)
3. Switch DVD to output mode from
NTSC/PAL/SECAM,
See if there is the action of switch
NTSC/PAL
/SECAM
.
17
480P/480i switch DVD
Component Cable
Play DVD
test disc
VIDEO ESSENTI
A
Set the DVD
to
progressive
output (P-
SCAN)
1. Select SOURCE then choose
AV3(HDTV)
2. Sending the signal from DVD test disc
(sixth paragraph)
4. Switch DVD output mode between P-
SCN ON/OFF
5. see if there is the action of switch
mode on the screen.(480i/480p).
18
1
Audio adjustment Pattern Generator
Sound input
External connect left-
right trumpet(10W X2, 4
Ohm.)
Any Pattern 1. Select SOURCE
2. Then press MENU KEY enter AUDIO
adjustment item.
a. Volume 1. Set the sound volume.
2. Check if the action is normal.
b.Sound mode
1. Make sure the sound is normal under
the Flat/Music/Movie/Speech/User
2. Check if the action is normal
c.Surround 1. Make sure the surround is normal
2. Check if the action is normal