Marantz 120B FM/AM Stereo Tuner Bi-Pin Voltage Ratings?
- Thread starter AnthonyD
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PCMALO
Member
Hi Anthony. If you are asking about the voltage ratings of the 6 function indicator lamps then, yes, they are 6.3V 40ma incandescent bulbs. I can't be positive re the stereo bulb however, as mine was burned out. I have heard that some stereo lamps are actually red, not clear, and are 12V bulbs. But since the 120B has a red colored 'window' for its stereo indicator, using a clear 6.3V bulb is fine. I replaced all mine with white LED lamps and installed a new piece of velum. They are a bit brighter than the original incandescents but I also replaced all the panel display bulbs with frosted warm-white 'fuse-type' bulbs so everything matches pretty well.
Originally, I had planned to just replace the burned-out stereo lamp but after going through all the effort to access the bulb mounting panel I decided to just replace them all with LEDs.
Hello
Thank you for your response. I know from the 4400 bi-pins, Marantz did add a 12V bi-pin for the stereo quad function. I have the schematics for the 120B but no voltages are marked for the bulbs except the scope bulb. As most Marantz reveivers/tuner do have the bezel already colored coded I have always used original incandescent bulbs to keep it original. However, the stereo bulbs being 12V have melted the plastic housing with a beige burnt color. and so will replace it with a LED type. I have trying to find the right vellium white thickness and found that I believe its about a 200gsm weight. The 100gsm I bought was too thin. What weight are you using?
Thanks my friend.
Anthony
Hello
Thanks for your reply. I have the service manual but does not specify the voltages except for the fuse type lamps. Most Marantz tuners and receivers using the bi-pins are 6.3V but on the 120B the stereo bulb is unknown unless its still 6.3V across the board. I have a Marantz 4400 and the stereo bulb is 12V. Could it be that the 120B stereo bulb be the same at 12V?
Thanks!
Anthony
PCMALO
Member
@AnthonyD said "The 100gsm I bought was too thin. What weight are you using?"
Sorry, can't tell you because I got it from a friend who works on Marantz amps. You can always double up the velum you have and see if that gives you the level of brightness you want. I used Scotch Double Sided Tape Runner to attach the velum and bezel to the frame. I would think the same double-sided adhesive would work well to glue two pieces of velum together at the edges.
Sorry, can't tell you because I got it from a friend who works on Marantz amps. You can always double up the velum you have and see if that gives you the level of brightness you want. I used Scotch Double Sided Tape Runner to attach the velum and bezel to the frame. I would think the same double-sided adhesive would work well to glue two pieces of velum together at the edges.