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Author Topic: National Panasonic Vintage Stereo Cassette poor FM/AM Reception  (Read 1998 times)

Offline Comanchee

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National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« on: March 18, 2010, 12:50:10 PM »
Mga Bosing.. baka pwed nyo po ako matulungnan dito.. meron kase ako nitong vintage na cassette sinusubukan kong ayusin.. medyo matagal na rin indi nagamit.. naging okay nman sya ng itest ko.. kaso nga poor reception sa FM/AM.. wala talgang makuhang signal khit lagayan ko na sya ng antenna.. SAan kaya may problema ito mga bosing..

NAresolder ko na rin ito.. dahil sa tagal na di nagamit.. may Power , sounds lahat gumagana pa nman.. poor lang talga reception..  ??? ??? ???
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National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« on: March 18, 2010, 12:50:10 PM »

Offline Comanchee

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #1 on: March 18, 2010, 01:52:57 PM »
mga bossing nid help lang.. :(
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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #1 on: March 18, 2010, 01:52:57 PM »

Offline Simatar

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #2 on: March 18, 2010, 03:44:32 PM »
Ts initial question lang... sa FM may naririnig kang hissing sounds pag nagdadial ka?
                                  at likewise sa AM maingay ba  or tahimik lang wala ka maririnig?
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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #2 on: March 18, 2010, 03:44:32 PM »

Offline pete

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #3 on: March 18, 2010, 03:47:25 PM »
check nyo rin po ang supply nya baka mahina narin
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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #3 on: March 18, 2010, 03:47:25 PM »

Offline Triple_D

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #4 on: March 18, 2010, 04:15:37 PM »
sir paki-check mga coupling cap jan sa tuner may na-encounter ako ganyan din ang problm,coupling capacitor sa tuner crkt.or paki-check na din sa am/fm switch sana makatulong...
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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #4 on: March 18, 2010, 04:15:37 PM »

Offline Comanchee

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #5 on: March 18, 2010, 11:03:46 PM »
Quote from: Simatar on March 18, 2010, 03:44:32 PM
Ts initial question lang... sa FM may naririnig kang hissing sounds pag nagdadial ka?
                                  at likewise sa AM maingay ba  or tahimik lang wala ka maririnig?
meron syang hissing sounds sa FM at ganun  din sa AM.. wala talga syang makuhang station khit lagyan ko ng antenna
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Offline Simatar

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #6 on: March 19, 2010, 10:27:54 AM »
Sir TS gawin nyo muna advice mga masters  clean switches , check voltages.. then update...

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Offline Comanchee

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #7 on: March 19, 2010, 11:52:30 AM »
mga sir tanong lang.. tpos ko na nacheck voltages.. and it reads lower than the given voltages of the capacitors... kailangan nbang palitan un..
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Offline danny

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #8 on: March 19, 2010, 12:31:19 PM »
may schematic ka ba na sinusundan?
anong model ba iyan :)
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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #9 on: March 19, 2010, 02:43:12 PM »
Quote from: Comanchee on March 19, 2010, 11:52:30 AM
mga sir tanong lang.. tpos ko na nacheck voltages.. and it reads lower than the given voltages of the capacitors... kailangan nbang palitan un..
Sir normally talagang mas mababa ang makukuha mong boltahe kaysa sa given value ng capacitor kung ang tinutukoy mong given value ay yung nakalagay sa capacitor mismo.

Sir no offense pero tanong lang kung technician din kayo?
Kya ko po tinatanong para alam namin iadopt ung pagbigay ng advice...

Nalinis nyo na po ba yung mga switches?

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Offline Triple_D

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #10 on: March 19, 2010, 02:56:39 PM »
nacheck mo na ba mga coupling cap malapit sa tuner ic?
nalinis mo na ba am/fm switch?
gawin mo muna mga advise sa taas tapos update ka ulit....
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Offline Comanchee

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #11 on: March 19, 2010, 03:02:02 PM »
nope.. im not a technician.. im just want to enhance my little knowledge bout electronics..hehehe self study kumbaga with the help of this site...

bout the switches? im working on it pa.. tinetest ko lang ung mga capacitor...
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Offline Comanchee

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #12 on: March 19, 2010, 03:05:35 PM »
Quote from: danny on March 19, 2010, 12:31:19 PM
may schematic ka ba na sinusundan?
anong model ba iyan :)
wala eh.. naghanap ako google pero mukhang wala na ata eh..
National Panasonic Model No. RX-C100F
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Offline Triple_D

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #13 on: March 19, 2010, 03:16:29 PM »
cge update ka na lang ulit tulungan ka ng mga
master dito.....
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Offline Comanchee

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #14 on: March 19, 2010, 03:20:30 PM »
maraming salamat mga masters..
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Offline Simatar

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #15 on: March 19, 2010, 03:38:50 PM »
A ok sir ...

Ung switches din sir clean, pati na rin kung may stereo mono switch yan pakilinis na rin Pwede ka gumamit ng kahit ano na contact cleaner apply (spray, make sure abot sa loob ng switch) mo lang then pagalawin mo switch. Pag ganon pa rin tulad advice mga master natin check ung mga capacitors sa bandang tuner. pansinin mo kung may mga nagdry na capacitor.
 then update ulit.

Ano ba ginamit na tuning capacitor ung plastic ang casing or ung metal ?
IC ba ang ginamit sa tuner sir? Pakipost number...
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Offline Comanchee

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #16 on: March 19, 2010, 05:24:08 PM »
Ung plastic sir para sa tuning capacitor..

ito nman ung number ng IC.. AN7220
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Offline Triple_D

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #17 on: March 19, 2010, 05:45:02 PM »
ok na ba ito?
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Offline Comanchee

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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #18 on: March 19, 2010, 06:19:49 PM »
mga master.. tpos ko na lahat ng advise nyo.. kaso ganun pa rin.. wala parin ako makuha signal...
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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #19 on: March 19, 2010, 07:32:01 PM »
sir kung naclean mo na switches, sunod mo check mga ceramic capacitors connected jan sa IC ... malamang may nagleak na, common trouble ng mga receivers...
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Re: National Panasonic Vintage Stereo Cassette poor FM/AM Reception
« Reply #19 on: March 19, 2010, 07:32:01 PM »
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