Author Topic: Integrated amplifier repair here in Mandamuyong-makati area (Read 5104 times)

armymanhaha · « **on:** Jan 20, 2015 at 06:56 AM »

Hi guys. I need help in finding a truly knowledgeable repair person based in Mandaluyong or Makati. I've been struggling finding a long-term fix to my NAD amp. I've returned the amp for about 6x (no kidding) to the local distributor and they only claim to find it a "POWER CABLE ISSUE". The fact the i've used multiple cables really isolates that claim..

Anyway, if you know somebody please help me get in touch with him. I really need the help.

Nelson de Leon · « **Reply #1 on:** Jan 20, 2015 at 07:50 AM »

Don King Markcrenz "da man". He's from Congressional Area. Worth the trip.
Does your amp shut off automatically?

armymanhaha · « **Reply #2 on:** Jan 20, 2015 at 08:18 AM »

Quote from: Nelson de Leon on Jan 20, 2015 at 07:50 AM

Don King Markcrenz "da man". He's from Congressional Area. Worth the trip.
Does your amp shut off automatically?

Yup! Pinipigilan ng self protection nung amp yung pagbukas nya. I suspect na merong dropped voltage somewhere. Nag raise na din ako ng ticket sa NAD mismo kinwento ko yung pagpapa RMA ko and how it was no help at all.

PS. Sa WattHiFi ko binili tong amp. They have been most kind and very helpful to me, especially Sir Rex. Pero sa distro na talaga yung problema eh. After going back and forth for about 6-7times the past year to have this repaired, at this point I am desperate and i am looking for skilled people to repair my unit.

synchro_01 · « **Reply #3 on:** Jan 20, 2015 at 08:23 AM »

Markcrenz is your guy. I had a sub amp that was deemed terminal by the manufacturer themselves. It took only Mark around 4 days to bring it back to life.

armymanhaha · « **Reply #4 on:** Jan 20, 2015 at 08:24 AM »

Will give him a go, medyo mahihirapan lang ako mag travel dun since bobo ako mag navigate hehehehe. Magkano inabot ng pa-repair mo sir Synchro?

Nelson de Leon · « **Reply #5 on:** Jan 20, 2015 at 08:33 AM »

Quote from: armymanhaha on Jan 20, 2015 at 08:24 AM

Will give him a go, medyo mahihirapan lang ako mag travel dun since bobo ako mag navigate hehehehe. Magkano inabot ng pa-repair mo sir Synchro?

Case to case basis siya mag-costing but it won't cost you an arm and a leg naman. Dinala mo ba sa distro directly or did the distro demoed the solution sa iyo? I mean if it's just power cord issue, they should have replaced it na lang.

armymanhaha · « **Reply #6 on:** Jan 20, 2015 at 08:39 AM »

Sa Watthifi ko dinadala. Si Sir Rex ang point of contact ko so transparent naman siya sakin na sa Distro nila dadalhin yung amp ko. So ang nangyayari is, pagbalik sa kanila nung amp tatawag si Sir Rex sakin para pabalikin ako sa WattHifi to show me that the amp is working again and then he'll tell me na the fix is "power cable swap" as per distro. Mga 6-7 times ako ganun. And pagbalik sakin gagana siya ng ilang linggo until it happens again.

I've swapped multiple cables, different regulators just to make sure walang surge na nangyayari. Madami din akong electronics dito including an HT and a high-end, high powered gaming PC na walang nagiging issue sa power.

markcrenz · « **Reply #7 on:** Jan 20, 2015 at 09:04 AM »

Quote from: synchro_01 on Jan 20, 2015 at 08:23 AM

Markcrenz is your guy. I had a sub amp that was deemed terminal by the manufacturer themselves. It took only Mark around 4 days to bring it back to life.

Ang bagal naman gumawa nyan, sub amp lang 4 days pa inabot.

armymanhaha · « **Reply #8 on:** Jan 20, 2015 at 09:35 AM »

Hahaha. Hi sir mark. Nag PM ako sayo 6mos ago pero I decided to give the distro guys another go at it kasi libre naman yung pagawa. Here I am again, back to scratch. Will get in touch with you soon.

Arulco · « **Reply #9 on:** Jan 20, 2015 at 12:47 PM »

@ TS

pag on ba nung amp niyo nag protection mode ba siya? As in red yung ilaw? Pinapatay niyo ba yung "vacation" switch sa likod everytime inooff yung amp or standby mode lang siya lagi?

Ganyan kasi dati yung C325bee ko. Dalawang beses ko pinagawa sa service center laging bumabalik yung problema. May pinalitan daw na transistor. Ang laki ng singil at ang tagal pa. Dinispose ko nalang na defective.

Fan ako ng NAD sound kaya C326bee din pinalit ko pero nabasa ko sa user reviews at discussion na may reliability issues daw yung mga amps nila since nilipat sa china yung production from Taiwan & Japan.

Nabasa ko rin na fully discreet ang circuitry ng mga C series at medyo tinipid yung ibang components. Prone to overheating din yung amp lalo na dito sa Pinas dahil doon sa Class A input stage ng Nad amps. Hindi kaya nakakadagdag sa wear and tear yung init?

Ang ginagawa ko ngayon, naka standby nalang yung amp pag naka off at nilagyan ko ng cdrking na USB fan sa ibabaw para malamigan yung amp habang ginagamit. Sa totoo lang, last Nad ko na to kung magkaproblema pa itong c326 ko.

armymanhaha · « **Reply #10 on:** Jan 20, 2015 at 01:07 PM »

Pinapatay ko sa switch nya lagi dati. Pero nung nagka issue, di ko na ginalaw yung switch. Ang issue nya kasi, pagsasak mo, nakaorange yung light, the instant you push the power button, its as if nagbubukas siya tapos mamamatay lang ulit back to orange light.

armymanhaha · « **Reply #11 on:** Jan 20, 2015 at 01:08 PM »

Akala ko din dati heat issue siya, pero indi eh. Malamig naman ngayon and sa gabi lang ako gumagamit.

Arulco · « **Reply #12 on:** Jan 20, 2015 at 01:17 PM »

Quote from: armymanhaha on Jan 20, 2015 at 01:07 PM

Ang issue nya kasi, pagsasak mo, nakaorange yung light, the instant you push the power button, its as if nagbubukas siya tapos mamamatay lang ulit back to orange light.

Yup. Ganyan din yung c325 ko dati pag inon. Red nga lang yung ilaw instead of orange.

tony · « **Reply #13 on:** Jan 20, 2015 at 01:25 PM »

pasig lang si vhinx, pm mo sya...

sovrain · « **Reply #14 on:** Jan 20, 2015 at 01:30 PM »

Quote from: markcrenz on Jan 20, 2015 at 09:04 AM

Ang bagal naman gumawa nyan, sub amp lang 4 days pa inabot.

ha ha ha, bagal ngang gumawa yang mabait na taong yan, sub amp ko, wala pa yatang 2 days na ginawa nya, may freebies pa,

armymanhaha · « **Reply #15 on:** Jan 20, 2015 at 01:32 PM »

I see. Parang may trauma na nga ako pag nakakarinig ako ng cliking noise sa amp dahil dito eh hehe.

It sucks to think na paperweight na tong amp ko may mdc dac pa naman to na nagustuhan ko ng sobra compared to rega and m1 dac. I really loved its sound and nanghiginayang ako palitan. Hopefully magka time ako para madala kay sir mark

tony · « **Reply #16 on:** Jan 20, 2015 at 01:40 PM »

Quote from: armymanhaha on Jan 20, 2015 at 01:08 PM

Akala ko din dati heat issue siya, pero indi eh. Malamig naman ngayon and sa gabi lang ako gumagamit.

try mo lagyan ng ilaw mga (25watts) sa loob ng case,
magkakalayo kasi ang mga parts nya kaya me thermal
diferences sa loob na possible nagti-triger ng protection circuit...
i off mo lang pag gagamitin...
or tutukan mo nang hair drier bago gamitin para uminit na yung loob,
low heat lang ang gamitin mo....
ang punto dito maging uniform ang init ng mga piyesa...
sa service center kasi o sa typical repair center hahanapan lang nila ng\
sirang piyesa, pero sa kaso mo duda ako ng me makikita sila...
kaya pabalik balik sa service center....

this amp is an example of the CFA type of amps,
used many years back but later rediscovered
because many people like the sonic signatures of this type of amps...
a spin off from the NAD3020...

armymanhaha · « **Reply #17 on:** Jan 20, 2015 at 01:43 PM »

Quote from: tony on Jan 20, 2015 at 01:40 PM

try mo lagyan ng ilaw mga (25watts) sa loob ng case,
magkakalayo kasi ang mga parts nya kaya me thermal
diferences sa loob na possible nagti-triger ng protection circuit...
i off mo lang pag gagamitin...
or tutukan mo nang hair drier bago gamitin para uminit na yung loob,
low heat lang ang gamitin mo....

Hmm onga no, tnx sir tony i will try that later. Will keep you posted here

tony · « **Reply #18 on:** Jan 20, 2015 at 01:59 PM »

if your amp innards look like this, then this is the basis for my suggestion,
a space heater can really be used here....
the low power of this amp means that you can just leave the power
switch on all the time...this does not consume big power at idle...

doasmarx · « **Reply #19 on:** Jan 20, 2015 at 02:18 PM »

Quote from: Nelson de Leon on Jan 20, 2015 at 07:50 AM

Don King Markcrenz "da man". He's from Congressional Area. Worth the trip.
Does your amp shut off automatically?

Could you pls PM Mackrens address and contact number malapit lang ako sa congre kc

Nelson de Leon · « **Reply #20 on:** Jan 20, 2015 at 03:06 PM »

Quote from: doasmarx on Jan 20, 2015 at 02:18 PM

Could you pls PM Mackrens address and contact number malapit lang ako sa congre kc

May ads siya dito sir. Pati map ng location ng palasyo niya. Kindly search na lang sir.

sovrain · « **Reply #21 on:** Jan 20, 2015 at 03:19 PM »

wala ka ng hahanapin pa

http://www.pinoydvd.com/index.php/topic,135325.0.html

synchro_01 · « **Reply #22 on:** Jan 20, 2015 at 03:27 PM »

Quote from: markcrenz on Jan 20, 2015 at 09:04 AM

Ang bagal naman gumawa nyan, sub amp lang 4 days pa inabot.

Yeah...and it took the owner close to 3 months to pick it up hahahahaha.

Guys take note ha...Velodyne even emailed me that the unit is terminal already. Si Mark lang ang katapat naayos agad.

doasmarx · « **Reply #23 on:** Jan 20, 2015 at 03:49 PM »

Quote from: Nelson de Leon on Jan 20, 2015 at 03:06 PM

May ads siya dito sir. Pati map ng location ng palasyo niya. Kindly search na lang sir.

Got it. Malapit nga sakin ty very much

AppleMan · « **Reply #24 on:** Jan 20, 2015 at 08:25 PM »

Yung binili kong NAD 326BEE di ko pa na-testing hehehe pina-ship ko na ng pinas nauna pa ako nakauwi di pa din dumating but before ko inilagay sa BOX na-notice ko yung RESISTOR na 5Watts ata yung dalawang kulay puti na square na magka-dikit dyan near the power transistor paguga ko ng finger tip ko at nakatingin ako dun sa solder side na-notice gumalaw yung paa nung RESISTOR in-short COLD SOLDER yung resistor pero di ko na pinawer-ON baka madale yung ibang parts at pagdating ng pinas tsaka ko na lang hihinangin yung paa, di kaya ganyan din sira nung kay @armymanhaha ? may mga COLD SOLDER na parts...

armymanhaha · « **Reply #25 on:** Jan 21, 2015 at 06:29 AM »

Thanks sa link ni sir Mark. Actually nag-pm na kami ni sir mga 6months ago ang tumigil sakin is yung layo ng place nya lalo na sakin na walang alam sa pag navigate. Pero ipupush ko na talaga.

@Tony

Sir, this is a NAD375BEE/DAC nga pala. Im sorry if I failed to mention this here. So sinubukan ko painitan ng onti but the issue persists.

@china

Siguro. Di ko talaga alam problema nito eh. Pero tinignan ko nga sa loob, cold solder nga siya. Nahirapan ako magcheck ng failed solderings pero siyempre di ko binaklas yung board, mukhang okay naman sila lahat sa surface. Who knows whats going on underneath the board..

dana · « **Reply #26 on:** Jan 21, 2015 at 03:19 PM »

that will benefit from a total reflow of solder pts. start from powersupply, power amp stage pabalik- baka yan lan problema, thermal stress ng pts due to age, thermal condn inside & use.
one thing i notice with vintage gears, large pads with clinched/bent terminals-add strength to solder joints vs new gears-mostly, small pads and inserted/protruding leads stands erect (can become weak easily due to thermal, vibration...)

on the other hand, kung nakaprotect mode ba kamo (?), maraming possibilities rin yan. for one, small or big DC presence sa speaker out (or before speaker relay).

tony · « **Reply #27 on:** Jan 21, 2015 at 04:06 PM »

isang channel lang most likely ang me output offset...

armymanhaha · « **Reply #28 on:** Jan 22, 2015 at 07:08 AM »

View My Video

armymanhaha · « **Reply #29 on:** Jan 22, 2015 at 07:08 AM »

ayan po yung vid nung problema