HOW TO REPAIR TOSHIBA TVs
Toshiba: 28W23B
Press "Menu", and enter digits [4-7-2-5] The service menu window will be displayed.
Toshiba: 28W23B
Picture displacement. Enter into service mode, as stated above. By pressing Green Button on the remote control, select the option [VP-1] (Vertical Position). Make necessary data value adjustments.
Toshiba: CF 3060K;
Screen size problem. Replace all capacitors in the vertical output section circuit. There will be 5 or 6 of them. Replace two 2.2MFd capacitors with good quality.
Toshiba: 175T9B;
Incorrect field lock when cold. Horizontal instability.
Check the 47MFD capacitor [AGC coupling] ( inside the tuner/VIF) unit.
Toshiba: 2505DB:
Frame collapse:
Repalce the diode fitted on the copper side of the printed circuit board. The diode (D570).
Toshiba: 198X6M:
Horizontal output transistor blows off repetedely.
Repalce [C403 & C408].
Toshiba: 2573:
Do not come out from standby.
Repace ZP82. If this do not help, replce tuner. Tuner is defective. (internal short).
Toshiba: 28WD98B:
Do not come out frm standby.
Check the 16VDC line for low voltage. Repalce C872 [220MFD 50V]
Toshiba: 2577B:
White horizontal lines.
Check all solder terminals to vertical output IC. [TA 8427k]. Resolder all the solder terminals, by applying fresh solder.
Toshiba: 215R8N:
Vertical distortion. Elongated picture [top portion]
It will be best to repalce all the electrolytic capacitors in the vertical section. Select capacitors with working temperature 105 degree C.
Toshiba: 219T9B:
Intermittent horizontal problem, after some hours of woring.
Replace the field output chip [AN5515] (IC 303).
Toshiba: 145R7B:
Dead. No picture; no sound; no standby light.
Check power switching IC [STR50020]. Check and replace all diodes related to SMPS power supply circuit.
Toshiba: 210T6BZ:
Sound distortion. Harh sound.
Check the voltage across 'C832'. Be sure it to be below 25VDC. Repalce Q809; C866; C896; C864. Check for any dry solder terminals in the main power supply regualtor section.
Toshiba: 2550TB:
Do not come out from standby. Do not switch on.
IC TA8427K is faulty. Repalce it.
Toshiba: 2857DB:
Horizontal instability.
Check for any loose or dry solder points at the terminals of regulator transistor [Q420]. This regulator transistor supplies voltage to frame generator IC.
Toshiba: CF 2666:
Screen with retrace lines, and non leanar structure. Might be too tall than normal.
Check C305(2.2MFD-50V). C342(1MFD50V). These capacitors can be located very near to vertical output IC [IC-301].
Toshiba: 2863DB:
To fault find to this TV, the protection device [D471], must be desoldered out first. It is a thyrister can located next to the SMPS transformer's secondary side.
Toshiba: AVM 2505:
Struck to standby.
Check the 5 VDC power supply. If it is OK, repalce the memory IC [IC A07] (Toshiba 23319016).
Toshiba: 3798DG:
Pin-cuschion distortion. [East West distortion].
Check and repalce diode D461 (ERC20-06).
Toshiba: 28W8DB:
Absensce of vertical (frame) drive; while sound and line drive is OK.
Check and replace the East West correction chip (TA1240).
Toshiba: 217D98:
Field distortion.
Check and replace capacitor (C317) [2.2MFD-50V], in the leanearity section.
Toshiba: 2857DB:
No sound or snow on screen. Only blue raster. Sound OK with SCART.
No sound. Service mode window is inaccessable. No menu or text.
Repalce tuner. It is faulty. [internal short