Hello,
My Pioneer TX-608 tuner has strange manners.
I can keep turning at the ‘tuner’ wheel untill tomorrow, nothing happens.
It seems as he has no reception at all.
The signal indicator doesn’t move, also the fine tuning meter doesn’t move, whatever I do. There is power on the unit.
My radio knowledge is not so fantastic. Last time I was really helped alot by the community here, so I wonder if there’s anyone who can help me find the problem?
Thank you in advance,
Vintagelover
Pioneer TX-608 AM/FM Stereo Tuner Manual | HiFi Engine
My Pioneer TX-608 tuner has strange manners.
I can keep turning at the ‘tuner’ wheel untill tomorrow, nothing happens.
It seems as he has no reception at all.
The signal indicator doesn’t move, also the fine tuning meter doesn’t move, whatever I do. There is power on the unit.
My radio knowledge is not so fantastic. Last time I was really helped alot by the community here, so I wonder if there’s anyone who can help me find the problem?
Thank you in advance,
Vintagelover
Pioneer TX-608 AM/FM Stereo Tuner Manual | HiFi Engine
Hi Vintagelover,
That's a standard tuner, nothing special about how it works.
Your tuning string is broken or loose. That's why your pointer doesn't move. Pop the top off and observe the string where it connects to the pointer. Is it a little loose, or no tension at all? The other thing that can happen is the pulley for the tuning cap can come out due to a worn bearing. So have a look at the pulley for the tuning capacitor. Take a picture please.
-Chris
That's a standard tuner, nothing special about how it works.
Your tuning string is broken or loose. That's why your pointer doesn't move. Pop the top off and observe the string where it connects to the pointer. Is it a little loose, or no tension at all? The other thing that can happen is the pulley for the tuning cap can come out due to a worn bearing. So have a look at the pulley for the tuning capacitor. Take a picture please.
-Chris
Hit my quota at HiFiEngine. My schematic download was only a partial too. I should have downloaded the thing when I looked at it earlier.
Your collector is high due to lack of load. Looks like the pass transistor went open C-E and the current is trying to come through the E-B connection. No surprise, seen it before. Replace the pass transistor - Q12. It's rated for 3A if memory serves, so a TIP41 would work fine.
Your collector is high due to lack of load. Looks like the pass transistor went open C-E and the current is trying to come through the E-B connection. No surprise, seen it before. Replace the pass transistor - Q12. It's rated for 3A if memory serves, so a TIP41 would work fine.
