Chassis TP.VST59.P63 - Schematic Diagram

1

2

3

4

5

6

A

A Vbridge

! CNB1

T3.15A 250Vac

!

!

!

    1     2     1     B     B     B     R     R     X     C

    2       B     X     C

!

!

! !

L FB1

FG

    2   LCB1    4

!     3

    4

LCB3    3

!

CYB2

    3     4     B     B     R     R

    1

CYB1

!

GND

    1

    1     B     V     O     M

RB124 CB118

    2

 NTCB1

    4     0     1     B     1     L

TB101

!

5

Vbridge

BDB3 BDB4 BDB1 BDB2

EB1

    2

 N

!

!  N

SGND

QB102

RB109

RB107

GD3

HSB1

HSB2

    S       H

    S       H

1

G1

FB1 ML1 M lar 

+12VA

GND

    6     1     1     B     R

    7     1     1     B     R

    8     1     1     B     R

!

2

    4

    B     1     0     1     B     C     P     3

3

    3     0     1     B     C

    4     0     1     B     R

1

6 UB101 2 5 3

4

    6     1     1     B     C

    4     0     1     B     D

9 38

CB113

2

2

+12VA

RB131

    1

!

    1

    5     3     1     B     R

RB132 CB109

PCB101A     2

    3 CB102

+12V

1

    9     1     1     B     R

EB106

CB101

EB102

B

    4     1     1     B     R

RB105

    1    3    2

EB101

9 8 GND

    6     3     1     B     R 1

    8     4     1     BVCC1     R

VCC1

DB101

3

LB102 +12V

LB101 2 1

RB108

5

4

+12VA 6 7

!

    0    1     2    2     1    1     B    B     R    R

6

56 7

CB114

RB106

    3     0     1     B     R GD2

    5     1     1     B     R

QB101

    2     0     1     B     R

GD1

    3     1     1     B     R

DB106

    1     0     1     B     R

B

MB1

    2     1     1     B     R

SGND

 N

RB123

CB119

RB133

SGND ZB101

SGND

    2

UB102

SGND MARK

MARK  

!

C

C

RB134

SGND

SGND

GND CYB3 GND

D

D Title

Size B Date File File 1

2

3

4

5

 Number umber

Revision Revision

TP.VST59.P63-MAIN POWER  2013/3/28 D Wor Work k .. 00_M 00_MAI AIN N POWE POWER. R.Sc SchD hDoc oc

V1.0 Sheet of   Dra Dra n B 6

 

 

 

 

 

 

1

2

3

4

5

6

A

A

CB812

RB826 RB827

LB801 +12V

LED+ DB801

RB814

BL-ON

CB810 DB802 RB815 +12V

DVCC RB817

B

RB816

ADJ

UB801

DVCC 1

8

2

7

3

6

ADJ CB807

CB801 GATE1     N     O       L     B

RB802

P RB821

GND

OVP1

    D

RB801

+12V

QB802

EB801

BL-ON

RB807

GATE1

QB801 G

    4     0     8     B     D

CB808

    S     8     0     8     B     R

  OVP1

    6     0     8     B RB804     C

LED-FB

CB809

    3 RB818     0     8     B     R

    7     3     8     B     R

    8     3     8     B     R

    9     3     8     B     R

    0     4     8     B     R

B

GND GND

DB803 GND

RB819

QB812

QB803

    C B

    E

 

RB805

RB824

4

GND

5

LED-FB

    E

CB802 RB820

CN807

    1 2 3 4 5 6

    0    1    2    3    4     1 2 3 4 5 6 7 8 9 1    1    1    1    1

B

RB825

RB806 CB803

    1     1     8     B     C

CB804

CB805

RB809 RB812 RB81 2 RB813

GND GND

CN806

    C

CN811

A

LED-FB

LED-FB

LED+

    2    4    6    8

LED+

GND

CN805     3    4     1 2 3 4 5 6 1    1

GND

CN804

CN801

    1 2 3 4 5 6 7 8

    1 2     1    3    5    7

C A

LED-FB

A LED-FB

LED+

LED+

C

LED+ LED-FB

P LED-FB DVCC

LED+

D

D Title

Size B Date File File 1

2

3

4

5

 Number umber

Revision Revision

TP.V TP.VST ST59 59.P .P6 63 LED LED DIRV DIRVER ER

V1.0 V1.0

2013/3/28 Sheet of   D Work Work .. 01_MA 01_MAIN IN POWE POWER-L R-LEDDirv EDDirver. er.Sch Dra Dr SchDo a Doc n cB 6

 

 

 

 

 

 

Troubleshooting Power supply trouble Display trouble Audio trouble Function trouble

1.Power Board Diagram

 AC input

EMI filter

Rectifier 

Power convertor 

Output filter 

19V/24 V output

Feed back

ON/ 0FF  ADJ/PWM

LED driver 

LED

extinguish

2.Power Board Service Guide

Non output, IR indicator light extinguish

Y

Check if 12V output normal N Check if FB1Open

Check the power components damaged or not

Y

Y

Change damaged components

N Y

Check EMI open or LN short

Change short components

N N

Check if EB1 voltage about 2Vac Y Check if UB101 PIN5 voltage is about 15V

Go to check Main board function

Y Check the rectifier 

Check if output short

N

Check if 148open

N Change UB101

Y

Change damaged resistors

3.Power Board Service Guide IR indicator light up but backlight extinguish

Y

Check if LED output cable is connect correction Y N

Check ADJ&PWM& ON/OFF Control signal Y Y

Check if brightness is in dim status N N

Check if LED output short

Check if UB801 PIN1 voltage is above 12V Y N Check if RB809, RB812,RB813 open

Y Y Correct the LED cable

Increase brightne ss

Remove short status

Change damaged resistors

Change UB801

Check Main board function

4

Power Supply Trouble Check E3 for 12V output





Check the test point :CD121 for +5V , CD26 for +1.2V_VDDC , and C13 for +3.3V_STB

F1 damage or check the power supply



Repair the abnormal circuit : 1.+5V—check UD11 and peripheral components 2.+1.2V_VDDC –- check U4 and peripheral components 3. +3.3V_STB—check U1



Power on , check C15 for M_5V , C33 for 2.5V output





Repair the abnormal circuit : 1.M_5V—check Q4 2.2.5V–- check U6



5

Display Trouble

blurred screen

blurred screen

Check if the cable is correct and connected tightly Y

N

Change the cable for panel

Check if the panel is OK

N

Y

Check if the output circuit from V59/ V29/ V39 to the jack are normal

Change panel

N Y

Change or repair the damaged components in this part

Check the circuit of V59/ V29/ V39

6

Display Trouble

white screen

White screen

Check if the voltage of panel power supply is normal(depends on panel)

Y

N

Check output signal from V59/ V29/ V39

Check the circuit of Q8

N

Change V59/ V29/ V39

Y

Change the panel or the cable to panel

7

Display Trouble

black screen Black screen

Check BLON for 5V output

N

Check if the control circuit from BLON to V59/ V29/ V39 is normal

N

Repair the circuit

Y

Change V59/ V29/ V39

Y

Check if the power supply for inverter is normal

N

Repair the power supply

Y

Change inverter

8

Audio Trouble

No sound) No sound

Check the AMP power  N

Y

Check the power supply circuit

Check if the mute pin voltage is normal N Y

Check the control circuit

Check the input signal N Y

Check the circuit from V59/ V29/ V39 to AMP

Check the output signal

N

Change AMP

Y

Check the circuit from AMP to the jack

9

Function Trouble

TV video TV can’t search any channel/no picture

Check input RF signal N

Y

Check the RF source

Check tuner power 

N

Check if IIC work

Check power supply circuit

N

Check IIC circuit

Y

Check LVIF output signal

N Check tuner and peripheral components

Y

Y

Check the circuit from tuner to V59/ V29/ V39

10

Function Trouble

PC

PC mode

Missing color, deflection color 

Check if the signal of V-sync,H-sync is OK

Y

Do “auto adjust” process

Picture dithering

Picture is not in centered

Do “reset” process on the menu

N

Check the circuit of R.G.B input

No signal

Check if the R.G.B input signal of V59/ V29/ V39 is normal

Y

Do “reset” process on the menu or the input mode can’t be supported

N

Check the circuit of VS.HS

Check the circuit of VS.HS

11

Function Trouble

SCART

HDMI  YPbPr  CVBS

SCART , HDMI , YPbPr , CVBS

Check the signal at the jack

N

Y

Check the signal at V59/ V29/ V39 pin

Check the external source

N

Check the circuit from jack to V59/ V29/ V39

Y

Change V59/ V29/ V39