Altec Lansing 353A – power amplifier – vacuum tube type – Circuit diagram - 6L6 - 12AX7

Used tubes – 12AX7 [pre-amplifier, tone control and audio pre-amplifier] – 6L6GC [audio output]

Circuit diagram

Tube pin-out -6L6

Tube pin-out 12AX7

LG 26H1DC1 – LCD TV – SMPS circuit diagram

26 inch LG LCD TV - LG26H1DC1 - power board circuit diagram

 SMPS Schematic LG 26H1DC1 – LCD TV

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EXA37617801 SMPS– Used with LG42LC7R LCD TV - Schematic

Circuit diagram

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LG Mini Hi-Fi system – CM9740 – NS9740 – SMPS and Power Amplifier schematic

LG 2900W Combo Hi-Fi system CM9740 – Power and Amp: circuit diagram

SMPS schematic

Power amplifier schematic

Sansui SV2918 Circuit diagram

Used ICs: STR-F6656 – TCLM13 – TB1240 – 4052 – TA1216AN – TDA2616Q – TA8427K – TA1275A – TDA9181

SV2518 – 64CM

SV2916i – nicam/secam

SV2918 – nicam

SV3418 – 87 cm

PAL BG, I, DK, NTSC 4.43 – NTSC 3.58(AV)

Circuit diagram

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Changhong LT52510F - AOC L52BS83FU -SMPS SCHEMATIC. 715T2919-1. Components: IC901: UCC28019DR-IC902: STR-W6252-IC905: L6599D

Changhong and AOC LCD TV - power supply circuit diagram. 715T2929-1

Schematic

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Caixa Ativa Digital de 15 inch PV115d Schematic - IRFB31N208D

Peavey – PV1015D – PV115D – PV215D – PV2015D – Circuit diagram.  Used semiconductors: IRFB31N208D – IRS2092 – IR2153D [SMPS control] – IRFB460 [SMPS switching output] – NJM4580

SMPS Circuit diagram

Tone control and power amplifier circuit diagram

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Color TV circuit diagram using TDA9341 IC 14 and 21 inch – Service mode - Memory IC replacement

TDA9341 – AT24C08 - CD4052 – AN7522 – TDA2003 – [LOT BSC25-N0832/BSC25-T1010A/BSC24-01N4014K] – Transistorized SMPS

FBT variations: FOR 29” 

BSC26-01-N4010F BSC26-N2143

BSC26-01N4010E BSC26-N2148

BSC26-01N4004F BSC26-01N

REPLACEMENT OF MEMORY IC

This TV circuit uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits.

When replacing memory IC, be sure to use IC written with the initial value of data.

PROCEDURE FOR REPLACING MEMORY IC

(1) Power off

Switch the power off and unplug the power cord from AC outlet.

(2) Replace IC

Be sure to use memory IC written with the initial data values.

(3) Power On

Plug the power cord into the AC outlet and switch the power On.

(4) Check and set system default value:

1) Press “MENU” key followed by digits '6''4''8' and '3'. Then Press “TEST” key on the Remote control unit for factory used.

2) The red “M”or”factory” will be displayed on the screen, repeat this and it will changed as follow: 

normal-M(factory)-BUS open-normal..

3) Press digital key, (Mkey) and corresponding on-screen display will be appeared.

4) Check the setting value of the SYSTEM default value of Table below. If the value is different, select items by [CH+]/[CH-] keys and set value by VOL+]/[VOL-] keys.

5) Press “STANDBY” key again and return to the normal screen.

Circuit diagram and PWB

BUS CONTROL ADJUSTMENT

TDA9351/9353: to enter BUS control mode, Press “MENU” key followed by digits '6''4''8' and '3'. Then press digit Press “0” to “9“ key, (Mkey) and corresponding on-screen display will be appeared.

TDA8370: to enter BUS control mode, Press “MENU” key followed by digits '6''4''8' and '3'. then Press “TEST” key on the Remote control unit twice for factory used(or press digits '6''4''8' and '3' twice.) and then press digit Press “0” to “9“ key, (Mkey) and corresponding on-screen display will be appeared.

On TV screen “TEST” will be indicated, this means entered bus control mode.

And press following key, each function will be available.