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- 17 -

No raster

Replace D_board

Standby 

voltage check :

D_board P1401 

5th 6V

Check No power

(Go to No power)

Measure 

Standby voltage :

A_board P804 7th 6V

Measure 

Standby voltage :

A_board P801 

2 nd pin 5V

Measure

module T-con voltage :

D_board C933 12V

FAIL

Replace A_board

Replace A_board

Check No power

(Go to No power)

FAIL

Replace D_board

Check No power

(Go to No power)

FAIL

FAIL

Replace D_board

FAIL

Measure 

Analog supply :

A_board P804 7th 6V,

10,11th 3.3V

Replace A_board

FAIL

PASS

PASS

PASS

PASS

PASS

PASS

Measure 

D_board supply voltage :

P1401 1th pin 3V

8th 6V, 10th 12V

PASS

PASS

- 18 -

No sound

Replace power board

Check Sound supply :

A_board P804 #1 18V

Check output 

to the Speaker :

Dose P601 No.1 waveform 

exist? 

Check 

If A_board 18V

is short-circuited.

Resistance btween A_board

P821 Pin No.2 

and 3 infnity?

FAIL

FAIL

FAIL

Replace A_board

Replace A_board

Replace Speaker

PASS

PASS

Measure

A_power board trans output:

18V at power_board 

CN803 #1

- 19 -

 

 

 

 

 

 

 

 

 

 

 

 

 

- 20 -

In this system there are 2 tuners - ATSC/NTSC tuner(TDVS-H701P) and NTSC-only tuner.(TAFM-H103P)
So it is impossible to have a digital (main)/digital (sub) PIP.

CXA2181Q is the AV switch for the component signals and CXA2069Q is the AV switch for the composite signals. 
The audio signals which separated by CXA2069 are sent to MSP4440.
AD9883 is AD converter and there are 2 NT decoders (uPD64011B) for main and sub NT signals each.

Gemstar is TV Guide On Screen system which provides program listings for cable-ready, cable box, and digital cable services as well
as over-the-air broadcast. And it needs 2 micoms (PIC18F242 is for IR blast and PIC18F1220 is for VBI slicing).

HD2.3 can receive TP data, MPEG2 video decoding and image processing. IEP2 chip enhances the output image quality. 

Main CPU (PPC405GPr-266) is the central processing IC, which controls most of the ICs.
CPLD (XC95288, XC95144) implements the glue-logic.

SATA Link(Sil3512) converts the SATA I/F to PCI for the EPF(memory card I/F) data. This TV will display images or play
music from a memory card(CF,SD,xD, MMC etc.)   

1394 communicates to either direction and can give and take image, sound, or each control commands with only one cable (this TV
can communicate with DVHS / Camcoder).     
HDMI port can receive video data via High-Definition Multimedia Interface (HDMI) or the Digital Visual Interface (DVI).
Sil9012 is HDMI receiver IC and TSB43DA42 controls the 1394 I/F.

This TV is capable of receiving basic analog, digital basic and digital premium cable television programming by direct connection to a
cable system providing such programming. A security card provided by cable operator (CableCard) is required to view encrypted digital
programming. Channel informations can receive in the OOB channel.
LGDT3701A demodulates the VSB/QAM signals and also OOB signal (QPSK).
LGDT3502B generates the CableCard I/F signals and decodes copy protected stream.