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Modelo - Chassis


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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyICF9650W
CRACK IN PCB No sound, dial lamp lights, found no B+ to radio.
SonyICF9650W
BREAKS IN PCB Circuit board broken at 3 out of 4 places where circuit boardis mounted on front panel. No damage visable on main cabinet assy.,packing or box.
SonyICF9650W
COLD SOLDER JOINT T404 Hum only, no AM, no FM, B+ for radio was only 1.5V insteadof 7.5V.
SonyICF9650W
BREAK IN PCB Dial light works, no sound.
SonyICF9530W
MISSING P/N The volume control part number is missing from the S/M.
SonyICF7750W
L17 NEEDED REDRESSING No weather band reception and dead carriers at intervalsacross high VHF band. Only sound of 2 local TV stations came through.
SonyICF7750W
LEADS BECOME LOOSE No sound intermittently because the audio output transformerby its very weight had caused its secondary leads to become unsolderedfrom the board. If this transformer were held in place by tabs as aretransformers used in color TV's, this problem, I feel,
SonyICF7370W
MISSING SWITCH ARM Radio would not switch from FM to PSB band.
SonyICF7280W
COLD SOLDER JOINT ON CT4 No AM.
SonyHST49
LEAKY CAP Unit came in with no AM and no FM. The amplifier and tapeportion works fine. Checked B+ at Pin 7 of IC101 and found 18.5V (nocurrent draw by IC). Replaced IC101 (CX-168), still no AM or FM.
SonyHST49
DEFECTIVE TUNING CAP After 15 minutes of operation, AM section stops operating.
SonyHST49
DEFECTIVE Q901 Output IC (501, 601) failure. A hole was found in IC's afterthey failed.
SonyHST49
INCORRECT P/N Service manual shows P/N 1-548-091-XX for tape counter, thiscounter will not mount in unit.
SonyHST48
DEFECTIVE IC HA1350S Unit turns on but no sound from speaker A or B channel. Ifnew speakers are plugged in they will blow because of 28 volts comingthrough defective HA1350S output IC. This also pertains to the HST-68 andHST-69.
SonyHMK339
MISSING PART NUMBER Part designated as spring plate on exploded view Page 32 ofS/M has no part number. -HQ COMMENTS: The part number is 3-554-215-00.


Assistência TécnicaAs dicas apresentadas destinam-se a técnicos de eletrónica, a tentativa de reparação ou assistência sem ter conhecimentos de eletricidade e eletrónica, podem provocar danos mais graves aos equipamentos e, devido a tensões muito elevadas em alguns circuitos, graves danos fisicos que podem constituir um risco em determinadas reparações.

Não arrisque reparar equipamentos com tensões elevadas se não tiver conhecimentos técnicos para o fazer em segurança.

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