Toshiba Tv Repair Tips
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Toshiba TV Repair tips Page 1 of 3 D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc
T o s h i b a T V Re pair tips Edited from : http://www.e-repair.co.uk/tips.htm
1 . Toshiba TV Model: 28W23B (11AK37 Chassis) Procedure to enter the service mode Press the menu button then 4,7,2,5 2 . Toshiba TV Model : 28W23B (11AK37 Chassis) Picture displaced vertically, picture too high or low This problem was cured by entering the service mode (menu then 4,7,2,5), then pressing the green fastext button to access geometry settings, selecting VP1 (vertical position) and adjusting as necessary. 3. Toshiba TV Model: CF3060K Problems with screen size Look out for 2 x 2.2uF electrolytics (sometimes red in color). 4. Toshiba TV Model: 175T9B Line tearing and incorrect field lock when cold 47uF electrolytic AGC decoupling capacitor inside tuner/if unit. 5. Toshiba TV Model: 2505DB Stretched frame or frame collapse Replace modification diode 570 on copper side. 6. Toshiba TV Model: 198X6M Horizontal output continues to short Check capacitors C403 and C408 (both 50v) these two caps tend to change capacitance. 7. Toshiba TV Model: 32ZD09G (C00S Chassis) Procedure to enter the service mode Press the mute key on the handset once, then press the mute key for a second time but hold it down while also pressing the menu button on the set. 8. Toshiba TV Model: 2573 Stuck in standby. Replaced ZP82 (o/c) And tuner (internal short). 9. Toshiba TV Model: 28WD98B Stuck in standby, 16 volt line low at approx 8 volts Replaced C872 (220uF, 50v), original had gone low in value D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc Toshiba TV Repair tips
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10. Toshiba TV Model: 2577B White horizontal line (Frame collapse) Dry joint on TA8427K, Frame IC. 11. Toshiba TV Model: 215R8N Severe vertical distortion- `egghead` symptoms Replaced c317 in vertical cct (2.2uf, 50v) substituted 4.7uF. Must be 105ºtype!! 12. Toshiba TV Model: 219T9B Intermittent field collapse after a few hours Replace field output chip IC303 (AN5515). 13. Toshiba TV Model: 145R7B Dead D808 s/c due to high HT caused by faulty switch mode ic (STR50020). 14. Toshiba TV Model: 210T6BZ Distorted sound / banging Voltage at C832 over 25V! Replace Q809, C866, C869, C864 and resolder dry joints in PSU. 15. Toshiba TV Model: 2550TB Set stuck in standby at switch on Field output ic TA8427K faulty, also change 220uf cap. 16. Toshiba TV Model: 2857DB Int. frame collapse Dry joints on regulator Q420, not too easy to find as it is not close to power supply or frame stage, it is the supply to the frame generetor IC. 17. Toshiba TV Model: CF2666R (TAC9102 Chassis) Screen is too tall, with vary faint retrace lines showing Found that Capacitor C305 (50V, 2.2uF) was dry, C342 (50V, 1uF) was also dry too. Capacitors are near vertical IC 301. 18. Toshiba TV Model: 2863DB (C6SR Chassis) To remove protection to assist fault finding Remove D471. It's a thyristor and is located next to the chopper transformer secondary side. 19. Toshiba TV Model: AVM 2505 (G3V25050 Chassis) Will not come out of standby, no picture If at power on voltage on pin 37 of the micro drops low then reverts to 5v suspect memory chip ICA07 (Toshiba 23319016). D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc Toshiba TV Repair tips
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Toshiba TV Repair tips Page 3 of 3 D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc
20. Toshiba TV Model: 3798DG (C8SS Chassis) E/W Pincushion distortion Replace D461 damper diode (ERC20-06). 21. Toshiba TV Model: 28W8DB No frame drive however sound and line drive is present E/W correction chip TA1240 (at front of line/frame chassis) was defective, replacing the IC cured the fault. 22. Toshiba TV Model: 217D98 Severe field distortion Check capacitor C317 (2.2uF, 50V) in linearity feedback circuit. 23. Toshiba TV Model: 2857DB (C5SS Chassis) Blue screen, no sound (ok on scart) or snow on screen, no sound, no service mode and menu text fluctuates, channels can not be tuned The tuner was faulty.
D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc Toshiba TV Repair tips
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T o s h i b a T V Re pair tips Edited from : http://www.e-repair.co.uk/tips.htm
1 . Toshiba TV Model: 28W23B (11AK37 Chassis) Procedure to enter the service mode Press the menu button then 4,7,2,5 2 . Toshiba TV Model : 28W23B (11AK37 Chassis) Picture displaced vertically, picture too high or low This problem was cured by entering the service mode (menu then 4,7,2,5), then pressing the green fastext button to access geometry settings, selecting VP1 (vertical position) and adjusting as necessary. 3. Toshiba TV Model: CF3060K Problems with screen size Look out for 2 x 2.2uF electrolytics (sometimes red in color). 4. Toshiba TV Model: 175T9B Line tearing and incorrect field lock when cold 47uF electrolytic AGC decoupling capacitor inside tuner/if unit. 5. Toshiba TV Model: 2505DB Stretched frame or frame collapse Replace modification diode 570 on copper side. 6. Toshiba TV Model: 198X6M Horizontal output continues to short Check capacitors C403 and C408 (both 50v) these two caps tend to change capacitance. 7. Toshiba TV Model: 32ZD09G (C00S Chassis) Procedure to enter the service mode Press the mute key on the handset once, then press the mute key for a second time but hold it down while also pressing the menu button on the set. 8. Toshiba TV Model: 2573 Stuck in standby. Replaced ZP82 (o/c) And tuner (internal short). 9. Toshiba TV Model: 28WD98B Stuck in standby, 16 volt line low at approx 8 volts Replaced C872 (220uF, 50v), original had gone low in value D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc Toshiba TV Repair tips
Page 1 of 3
Toshiba TV Repair tips Page 2 of 3 D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc
10. Toshiba TV Model: 2577B White horizontal line (Frame collapse) Dry joint on TA8427K, Frame IC. 11. Toshiba TV Model: 215R8N Severe vertical distortion- `egghead` symptoms Replaced c317 in vertical cct (2.2uf, 50v) substituted 4.7uF. Must be 105ºtype!! 12. Toshiba TV Model: 219T9B Intermittent field collapse after a few hours Replace field output chip IC303 (AN5515). 13. Toshiba TV Model: 145R7B Dead D808 s/c due to high HT caused by faulty switch mode ic (STR50020). 14. Toshiba TV Model: 210T6BZ Distorted sound / banging Voltage at C832 over 25V! Replace Q809, C866, C869, C864 and resolder dry joints in PSU. 15. Toshiba TV Model: 2550TB Set stuck in standby at switch on Field output ic TA8427K faulty, also change 220uf cap. 16. Toshiba TV Model: 2857DB Int. frame collapse Dry joints on regulator Q420, not too easy to find as it is not close to power supply or frame stage, it is the supply to the frame generetor IC. 17. Toshiba TV Model: CF2666R (TAC9102 Chassis) Screen is too tall, with vary faint retrace lines showing Found that Capacitor C305 (50V, 2.2uF) was dry, C342 (50V, 1uF) was also dry too. Capacitors are near vertical IC 301. 18. Toshiba TV Model: 2863DB (C6SR Chassis) To remove protection to assist fault finding Remove D471. It's a thyristor and is located next to the chopper transformer secondary side. 19. Toshiba TV Model: AVM 2505 (G3V25050 Chassis) Will not come out of standby, no picture If at power on voltage on pin 37 of the micro drops low then reverts to 5v suspect memory chip ICA07 (Toshiba 23319016). D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc Toshiba TV Repair tips
Page 2 of 3
Toshiba TV Repair tips Page 3 of 3 D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc
20. Toshiba TV Model: 3798DG (C8SS Chassis) E/W Pincushion distortion Replace D461 damper diode (ERC20-06). 21. Toshiba TV Model: 28W8DB No frame drive however sound and line drive is present E/W correction chip TA1240 (at front of line/frame chassis) was defective, replacing the IC cured the fault. 22. Toshiba TV Model: 217D98 Severe field distortion Check capacitor C317 (2.2uF, 50V) in linearity feedback circuit. 23. Toshiba TV Model: 2857DB (C5SS Chassis) Blue screen, no sound (ok on scart) or snow on screen, no sound, no service mode and menu text fluctuates, channels can not be tuned The tuner was faulty.
D:\My documents\Warehouse\Novri_yadi\Schematic Files\New Schematics\TV's\Toshiba\Toshiba TV Repair tips.doc Toshiba TV Repair tips
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