Marantz 2270 FM voltage issue ?

[xalara76]

Got this 2270 - it has been fully recapped- I mean absolutely every single board. Works flawlessly in every mode besides FM. FM is extremely faint even at 2 o’clock volume ! Stereo light is also extremely dim when in FM mode. Signal stength meter works well but ive noticed the fm tuning meter seems to be dead as well. Measured power supply voltage J804 & J805 to start and it seems to be bouncing all around - again fully recapped, new relay etc.

Scratching my head over here as to whats wrong.

 

[sanjib]

Have you checked the voltage at pin J801 on power supply board P-800?

 

[xalara76]

Have you checked the voltage at pin J801 on power supply board P-800?

Just checked. Getting 12.84 V

 

[sanjib]

It should be 13.5V. What is the voltage at Pin J802?

 

[xalara76]

It should be 13.5V. What is the voltage at Pin J802?

32.6

 

[xalara76]

It should be 13.5V. What is the voltage at Pin J802?

Getting 35v at 802 & 803 once I adjusted it now

 

[xalara76]

It should be 13.5V. What is the voltage at Pin J802?

J101 in FM 0v
J102 in FM 0V
J103 in FM 0v
J104 in Fm 12.7v
J105 in FM 0v
J106 in FM 0v

 

[sanjib]

Now what is the voltage at 801?

 

[xalara76]

Now what is the voltage at 801?

Still 12.7.

also wanted to note on P500 board everything is 0V besides J553 that is 12.7V also

 

[sanjib]

What are the voltages at the base and collector of H803?

 

[xalara76]

What are the voltages at the base and collector of H803?

13.4V at base
34.5V at collector

 

[sanjib]

Can you desolder one end of R803 and measure the value of it?
The tuner power comes from J801 and it is supposed to be 13.5V. You are having 0.8V less and I don't know that a 0.8V difference in voltage will make the tuner non-working or not. I would check the R803 and if the value is 150ohm I will keep it and replace H803 with MJE15030.

 

[sanjib]

Are the all tuner boards also recapped?

 

[xalara76]

Can you desolder one end of R803 and measure the value of it?
The tuner power comes from J801 and it is supposed to be 13.5V. You are having 0.8V less and I don't know that a 0.8V difference in voltage will make the tuner non-working or not. I would check the R803 and if the value is 150ohm I will keep it and replace H803 with MJE15030.

Will do this now and report back in a minute

 

[xalara76]

Are the all tuner boards also recapped?

Yes they are. AM works perfect too. Tuning meter is dead, stereo light dim, and FM is extremely low output

 

[sanjib]

If AM works perfectly then the voltage probably will not be an issue. Is the tuner is aligned during restoration?

 

[xalara76]

If AM works perfectly then the voltage probably will not be an issue. Is the tuner is aligned during restoration?

Im not sure, I bought this online. But R803 just cracked on me. Whats the proper replacement please

 

[sanjib]

It is a white ceramic resistor, right?

 

[xalara76]

It is a white ceramic resistor, right?

 

[sanjib]

Okay, I was wrong regarding the resistor number on board. This is I think 10ohm 1/2W resistor. Can you tell me the color code it is a little difficult to see.
Do you have any big white ceramic resistors on the board? According to the schematic, it should be R013.