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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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RCA TV F27702SB CTC169CA6 "Dog"
Hi,
This RCA TV CTC169CA6 (10/95) "died" (no storm), said my customer. I replaced the following parts: 5A fuse, Q4101 # 200165 ("chopper output"), C4108 39uf 100V 105 deg., U4101 # 200419, CR4122 # 200158, C4102 2.2uf 100V 105 deg., C4141 470uf 180V 105 deg. I opened the B+ line to the FBT for intial power supply test. Other parts tested ok, but the power supply will not "run"! What did I overlook? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. |
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RCA TV F27702SB CTC169CA6 "Dog"
Diode rectifying the 15V standby, IIRC CR4118.
Leonard "Brad" wrote in message ... Hi, This RCA TV CTC169CA6 (10/95) "died" (no storm), said my customer. I replaced the following parts: 5A fuse, Q4101 # 200165 ("chopper output"), C4108 39uf 100V 105 deg., U4101 # 200419, CR4122 # 200158, C4102 2.2uf 100V 105 deg., C4141 470uf 180V 105 deg. I opened the B+ line to the FBT for intial power supply test. Other parts tested ok, but the power supply will not "run"! What did I overlook? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. |
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RCA TV F27702SB CTC169CA6 "Dog"
What about the 15 mfd or maybe the 22 mfd
plus there are two diodes to the right of the smps txfmr change those also. kip |
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RCA TV F27702SB CTC169CA6 "Dog"
On Sat, 7 Aug 2004 13:22:41 -0400, "Leonard Caillouet"
wrote: Diode rectifying the 15V standby, IIRC CR4118. Leonard One question how can you tell the SMPS is running? I use a scope on 1v scale and lay the probe on side of SMPS transformer. In standby it is in burst mode. Wait till you are sure the SMPS is humming along and checked the volt on the CR4118. If it too low, change it (11V is minimum). Oh, forgot to change other two capacitors as well. 470uF 35V and 15uF 100V (get it from RCA or supplier if have it, both rated 105C and hi freq). I always do all four capacitors. Cheers, Wizard "Brad" wrote in message ... Hi, This RCA TV CTC169CA6 (10/95) "died" (no storm), said my customer. I replaced the following parts: 5A fuse, Q4101 # 200165 ("chopper output"), C4108 39uf 100V 105 deg., U4101 # 200419, CR4122 # 200158, C4102 2.2uf 100V 105 deg., C4141 470uf 180V 105 deg. I opened the B+ line to the FBT for intial power supply test. Other parts tested ok, but the power supply will not "run"! What did I overlook? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. |
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