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         2008-03-14 

LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU 

 33 

 

Before you start to write the code, we suggest you setup the environment first. This chapter lists the setup requirements and guides you to setup and test 

your development environment. 

 

Please follow the following step to upgrade the firmware. 

 

1. Copy the software firmware (*.pkg) to USB Disk.  

2. Modify the pkg’s filename to “upgrade.pkg” 

3. Insert the USB Disk to TV USB port. 

 

4. TV AC power off -> AC power on 

5. TV will upgrade after detect the USB disk condition and the content of the pkg file.  

Select “Yes” , then press “>” on the remote control, TV will upgrade the software by itself. 

 

6. After finish upgrade process, Press “

” on the remote control to turn off the TV. 

LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU 

34  

 

7. Remove USB disk from TV. 

8. Check the software version is correct or not.  

(MENU / Features) 

 

 

         2008-03-14 

LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU 

 35 

CHAPTER 4. 

 

 

 

 

↓ 

 
 

LINE_FILTER_UNIT:         

↓ YES

 

 
 
 
 
 

 

POWER_UNIT                     

↓YES

  

 
 
 

↓YES 

 
 
 
 

↓YES 

 
 
 
 
 
 
 
 
 
 

 

 

 

 

 

 

 

Are the power cord and harness in the unit properly connected? 

NO 

Connect the power cord and harness properly, and turn on the 
power.

Is F901 normal? 

NO 

 

LINE_FILTER_UNIT: 
Isn't C908, RV901, L902, C900, C901, etc. out of order? 
Moreover, whether the short-circuit with the circumference circuit 
is checked. 

Is BD901 (+320V) output?  
 
*  When power on/off switch is on  ‧‧‧ About +400V 

Does the circuit operate normally? 
Check circuit around (FB901, Q906, ZD904, IC901 etc ). 

 

NO 

 

Is a voltage of +5.3V applied to pin (3,4) of connector (CN902)? 

Does the switching circuit operate normally? 
Check circuit around the primary side (T901, ZD906, D901, 
D903, Q903, D904, IC901, IC902, D905 etc.), the secondary 
side (D905, L904, etc.), the DC_DET circuit (IC902, ZD903, 
IC901, ZD902, etc.), and the protection circuit.

NO 

 

Is a voltage of +18V applied to pin (8,9) of connector (CN902)? 

 

NO 

 

Does the inverter circuit operate normally? 
Check circuit around (Q801, ZD801, ZD802, Q805, Q806, IC801, 
T801, L801, L802, etc.), and the protection circuit.

 

LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU 

36  

The sound is not emitted from the speaker though the picture has come out.  

↓ 

No sound output in all modes?

 

TEREMINAL UNIT:

   

    ↓ 

 

 

↓YES 

 

 

↓YES 

 
 

↓YES 

 
 

↓YES 

 
 

↓YES 

 
 
 

No sound (during the reception of TV(ANALOG) broadcasting) 

↓ 

Does not the sound go out though the picture has come out when UHF/VHF is received?

 

TEREMINAL UNIT:

   

↓ 

 
 

↓YES 

 
 

↓YES 

 
 
 
 
 
 
 
 
 
 

Is the audio signal output of pin (H26) (AL0) and pin (H25) (AR0) of 
IC U400 normal? 

NO 

 

Check IC U400 and its peripheral circuits.

Is audio signal input to pin (2)(L), pin (14)(R) of IC U600 (AMP)?

NO 

 

Check the line between IC U605 and IC U600.

Is MUTE circuit [AMP_MUTE_LINE, POWERUP_LINE] normal?

Is the audio signal output of pin (3, 4) (L-ch) and pin (1, 2) (R-ch) of 
CN600 (AOUDIO-CONNECTOR) normal? 

NO 

 

Check the AMP_MUTE_LINE and POWERUP_LINE. (Q600, 
etc.) 

NO 

 

Check IC U600 and its peripheral circuits.

Check Speaker Box (right and left) and wire harness.

 

Is the SIF signal output from pin (11) of TUNER (TU201)?

 

Is the SIF signal sent to pin (AB25) and pin (AB26) of IC U400?

NO 

 

Check the tuner and its peripheral circuits. Replace as required.

NO 

 

Check IC U400 its peripheral circuits.

 

Refer to “No sound output in all modes”.

 

Is the audio signal output of pin (17) (PGA2OUTL) and pin (18) 
(PGA2OUTR) of IC U605 normal? 

NO 

 

Check IC U605 and its peripheral circuits.