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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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35"mitsubishi still have color problem
have 35"mitsubishi with no color when cold. if you heat up around the ic
201 0r caps along side of it color comes on froze cap c-216 color came on. changed cap and does same thing with new as old.esr all caps and they pin the needle. changed ic201, 358 crystal. even had another complete pip cir board. and its the same with both. it seems no matter what you freeze in that area color goes out. heat it up and color comes back. could we be just changing the freq. of something just enough to start color osc. any ideas? thanks jack@ allen park tv allen park mi. |
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Obviously there is some component that is just off value enough to cause
this fault. This can be very tough to find. Did you check that the free-running frequency of the 3.58 mHz reference is close enough? Especially that you changed the crystal, it may be too far out, since these do have some tolerance in their specs. There should be an adjustment that is done by either a trimmer cap on the circuit board, or a software set-up of some type through a service menu, or a PC interface. -- Jerry G. ====== "458" wrote in message lkaboutelectronicequipment.com... have 35"mitsubishi with no color when cold. if you heat up around the ic 201 0r caps along side of it color comes on froze cap c-216 color came on. changed cap and does same thing with new as old.esr all caps and they pin the needle. changed ic201, 358 crystal. even had another complete pip cir board. and its the same with both. it seems no matter what you freeze in that area color goes out. heat it up and color comes back. could we be just changing the freq. of something just enough to start color osc. any ideas? thanks jack@ allen park tv allen park mi. |
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"Jerry G." bravely wrote to "All" (23 Nov 04 07:31:14)
--- on the heady topic of " 35"mitsubishi still have color problem" How about the colour killer reference threshold? JG From: "Jerry G." JG Obviously there is some component that is just off value enough to JG cause this fault. This can be very tough to find. Did you check that JG the free-running frequency of the 3.58 mHz reference is close enough? JG Especially that you changed the crystal, it may be too far out, since JG these do have some tolerance in their specs. There should be an JG adjustment that is done by either a trimmer cap on the circuit board, JG or a software set-up of some type through a service menu, or a PC JG interface. JG -- JG Jerry G. JG =3d=3d=3d=3d=3d=3d JG "458" wrote in message JG lkaboutelectronicequi JG pment.com... have 35"mitsubishi with no color when cold. if you heat JG up around the ic 201 0r caps along side of it color comes on froze JG cap c-216 color came on. changed cap and does same thing with new as JG old.esr all caps and they pin the needle. changed ic201, 358 crystal. JG even had another complete pip cir board. and its the same with both. JG it seems no matter what you freeze in that area color goes out. heat JG it up and color comes back. could we be just changing the freq. of JG something just enough to start color osc. any ideas? thanks jack@ JG allen park tv allen park mi. .... Well I defragged my TV and went all the way back to basic cable! |
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"458" wrote in message lkaboutelectronicequipment ..com... have 35"mitsubishi with no color when cold. if you heat up around the ic 201 0r caps along side of it color comes on froze cap c-216 color came on. changed cap and does same thing with new as old.esr all caps and they pin the needle. changed ic201, 358 crystal. even had another complete pip cir board. and its the same with both. it seems no matter what you freeze in that area color goes out. heat it up and color comes back. could we be just changing the freq. of something just enough to start color osc. any ideas? thanks jack@ allen park tv allen park mi. What model, How old? Check for leaking caps, they might check good. Also if they have leaked onto the board the electrolite may cause problems when it's wet (gets moisture from air). Drying it with a hari dryer and the set works. |
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"458" wrote in message alkaboutelectronicequipment.com...
have 35"mitsubishi with no color when cold. if you heat up around the ic 201 0r caps along side of it color comes on froze cap c-216 color came on. changed cap and does same thing with new as old.esr all caps and they pin the needle. changed ic201, 358 crystal. even had another complete pip cir board. and its the same with both. it seems no matter what you freeze in that area color goes out. heat it up and color comes back. could we be just changing the freq. of something just enough to start color osc. any ideas? thanks jack@ allen park tv allen park mi. hi, I need the model number in order to help??? |
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ck 3514-r
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#7
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"458" wrote in message alkaboutelectronicequipment.com...
have 35"mitsubishi with no color when cold. if you heat up around the ic 201 0r caps along side of it color comes on froze cap c-216 color came on. changed cap and does same thing with new as old.esr all caps and they pin the needle. changed ic201, 358 crystal. even had another complete pip cir board. and its the same with both. it seems no matter what you freeze in that area color goes out. heat it up and color comes back. could we be just changing the freq. of something just enough to start color osc. any ideas? thanks jack@ allen park tv allen park mi. Hi, I need the model number in order to help???? |
#8
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"458" wrote in message alkaboutelectronicequipment.com...
have 35"mitsubishi with no color when cold. if you heat up around the ic 201 0r caps along side of it color comes on froze cap c-216 color came on. changed cap and does same thing with new as old.esr all caps and they pin the needle. changed ic201, 358 crystal. even had another complete pip cir board. and its the same with both. it seems no matter what you freeze in that area color goes out. heat it up and color comes back. could we be just changing the freq. of something just enough to start color osc. any ideas? thanks jack@ allen park tv allen park mi. Check c627 and Q2D1 for open... |
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