jWIN JV-DTV23 User manual

1
jWIN Electronics Corp.
SERVICE MANUAL
23”/27”/30"/32”/37” TFT-LCD TV/MONITOR
Model Number
JV-DTV23
JV-DTV27
JV-DTV30
JV-DTV32
JV-DTV37
March 2005
Version 1.0 English
"All brand and product names are trademarks of jWIN Electronics Corporation, unless
otherwise noted. All information provided in this manual is copyrighted. All rights reserved."

2
CONTENTS
1. Safety Instructions.................................................................................................... 3
2. BLOCK DIAGRAM ..................................................................................................... 4
3. TROUBLESHOOTING ............................................................................................. 10
4. CONTROLS OF FRONT PANEL ............................................................................. 13
5. CONNECTIONS OF BACK PANEL......................................................................... 14
6. REMOTE CONTROL HANDSET............................................................................. 15
7. CONNECTING DIAGRAM..................................................................................... 16
8. PCB LAYOUT.......................................................................................................... 17
9. SCHEMATIC DIAGRAM.......................................................................................... 25
10. EXPLODED VIEW ................................................................................................. 38
11. REPLACEMENT PARTS LIST.............................................................................. 46

3
1. Safety Instructions
Important Safety Notice
Many electrical and mechanical parts in this chassis have special safety-related characteristics.
These parts are identified by in the Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet. Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water
Pipe, Conduit, etc) and the exposed metallic parts. Measure the AC voltage across the resistor using AC
voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug of the AC cord into the AC outlet and repeat
AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt
RMS, which is, corresponds to 0.5mA. In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.
AC Volt-meter
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
1.5 Kohm/10W
0.15uF
To Instrument’s
exposed
METALLIC PARTS
AC Volt-meter
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
1.5 Kohm/10W
0.15uF
To Instrument’s
exposed
METALLIC PARTS

4
2. BLOCK DIAGRAM
■ BLOCK DIAGRAM
`
SCART2_LO/ RO
SW_FB/R/G/B
DTV_Y/ Pr/ Pb
480I_Y/Cb/Cr(S)
J- L003
TxT_Vout
H- DET
TxT_Vout
H- DET
VO_ R[ 0 . . 7] VO_B[ 0..7]
V0_G[ 0. .7]
DIG[ 0..23]
OP_HSYNC
OP_VSYNC
PCLK_OUT
OP_ENABLE
SVP_HSYNC
SVP_VSYNC
SVP_PCLK
SVP_ENABLE
LCD
LVDS
PanelTV-
SVP
BGA 320
TPA3001
MSP3410
S- VIDIO
COMP
(RCA_L/R)
TUNER
F_SCART H_SCART
DVI_I
COMPONENT
VPC3230
AD9882
CXA2069
SVHS_C
SVHS_Y
SCART2_VI/ LI/ RI
SCART2_ID
SCART2_VO
TV_V
SIF/ AM_AUDIO
TV_O
SCART1_VI/ LI/ RI
SCART1_ID
SCART_FB/R/G/B
COMP_L/ R
CVBS(S)
Y_OUT(S)
C_OUT(S)
TV_L/ R
TV_L/ R
TV_L/ R
PI5V330
BA7657
TR
COMP_Y/ Pr/
Pb
AUDIO_R/ L
AUDIO_R/ L
480i_Y/ Cb/ Cr(M)
TXT_FB/ R/ G/ B
PC
(DSUB- 15)
74HCT08
PC_VS/ HS
VPC_HS/ VS
VPC_H S/ VS
VPC_H S1/ VS1
PC_VS/HS
PC_R/G/B
PC_DTV_HS/ VS
(VPC_HS1/ VS1)
PC_R/ Pr
PC_G/ Y
PC_B/ Pb
CAPD[ 0..23]
HSMP / HSPIP
VSMP / VSPIP
CLKMP / CLKPIP
CAPD
[ 8..23]
SDRAM
X2
SDA555
SDRAM
EEPROM
TXT_FB/R/G/B
CPU_INT
CPU_WR
CPU_RD
CPU_ALE
VPC_VS1 / HS1
CPU_AD[ 0..7]
L_SPK
R_SPK
SPEAKER
DPTV- 23/30 Block Diagram
CVBS(M)/Y_OUT(M)/C_OUT(M)
SIF/ AM_AUDIO
EEPROM
EEPROM
EPROM
PC_AUDIO
JACK
PC_AUDIO_L/ R
D- SUB9 DS232 RXD_UART
TXD_UART
TXT_FB,
(FB2_SVP)
TXT_FB,
(FB2_SVP)
■ IC FUNCTIONAL BLOCK DIAGRAM (PanelTV-SVP)

5
■ IC BALL ASSIGNMENT (PanelTV-SVP)
■ IC BLOCK DIAGRAM (MSP3410G)

6
■ IC PIN OUT (MSP3410G)
■ IC BLOCK DIAGRAM (TPA3001D2)

7
■ IC PIN OUT (TPA3001D2)
■ IC BLOCK DIAGRAM (VPC3202D-C5)

8
■ IC PIN OUT (VPC3202D-C5)
■ IC BLOCK DIAGRAM (AD9882)

9
■ IC PIN OUT (AD9882)

10
3. TROUBLESHOOTING
No Raster
Check
P1004,P1005
Connector?
Fasten
P701 or P702
Connector
Fasten
P1004,P1005
Connector
Contact A/S Team
Check
P701 or P702
Connector?
YES
NO
NO
YES
No Raster
Check
P1001 or P1007,
P1008
Connector?
Fasten P1001
or P1007, P1008
Connector
NO
YES
YES
Check
P101,P102
Connector?
Fasten
P101,P102
Connector
NO
YES

11
No Picture
Check IC502
Pin2 : High?
Check X401
Check IC503
Pin3 : High?
Check
IC902,IC903
Pin2 : High?
Contact A/S Team
Replace
IC502
Replace
IC503
Replace
X401
Replace
IC902,IC903
YES
NO
YES
NO
YES
NO
NO
YES
No Picture
Check IC701
Pin2 : High? Replace
IC701
YES
NO
YES

12
No Sound
Replace
X901
Replace
IC901
Contact A/S Team
Check IC901
Pin 27,28?
Check X901 ?
YES
NO
NO
YES
No Sound
Check IC906
Pin3 :5V?
YES
NO
Replace
IC906
YES
Replace
IC904,IC905
Check
IC904,IC905
Pin 14,15
NO
YES

13
4. CONTROLS OF FRONT PANEL
1.MAIN POWER
switches the set on or off.
2.D / E (Programme Up/Down)
selects a programme or a menu item.
switches the set on from standby.
3.F / G (Volume Down/Up)
adjusts the volume.
adjusts menu settings.
4.MENU
selects a menu.
5. INPUT SELECT
selects TV, AV1, AV2, S-Video, Component,
RGB-DTV, RGB-PC, RGB-DVI mode.
switches the set on from standby.
6. POWER (I / r )
switches the set on from standby or off to standby.
7.POWER/STANDBY INDICATOR (r)
illuminates red in standby mode.
illuminates green when the set is switched on.
8.REMOTE CONTROL SENSOR

14
5. CONNECTIONS OF BACK PANEL
1. RGB INPUT / AUDIO INPUT / DVI INPUT SOCKETS
Connect the set output socket of the PERSONAL COMPUTER
to this socket.
2. RS-232C INPUT(CONTROL/SERVICE) PORT
Connect to the RS-232C port on a PC.
3. AUDIO INPUT / COMPONENT INPUT (480i/480p/720p/1080i) SOCKETS
4. S-VIDEO INPUT
connect video out from an S-VIDEO VCR to the SVIDEO input.
EURO SCART SOCKET
connect the euro scart socket of the VCR to these sockets.
5. AERIAL SOCKET
6.POWER CORD SOCKET
This set operates on an AC power. The voltage is indicated on the Specifications page. Never attempt
to operate the set on DC power.

15
6. REMOTE CONTROL HANDSET

16
7. CONNECTING DIAGRAM

17
8. PCB LAYOUT
■AV TOP PATTEN
■AV TOP SILK

18
■AV BOTTOM PATTEN

19
■AV BOTTOM SILK

20
■MAIN TOP PATTEN