Hi to everyone,
I'm trying to repair my Revox B150 amp.
When I connect it to the AC mains nothing happens except for:
. the "Speaker A", "Speaker B" and "Remote" leds on front panel light up;
. after few seconds, the speaker relais switch on.
All the sections (transformer, power supply board, preamp board, phono unit, input/output unit, power amp board) are ok except for the microcomputer board.
Especially, it seems that the microcomputer IC1 (HD63A01V1, rel. 1.725.290.07) and IC2 (PCF84C81, rel. 1.725.290.05) have serious problems, but it's very difficult to me to detect the fault in a more precise way.
Is it a common problem? Any idea about any further investigation I could perform? Where (except for the very expensive Revox jewelry) could I find those ICs?
As usual, thx a lot in advance to everyone
I'm trying to repair my Revox B150 amp.
When I connect it to the AC mains nothing happens except for:
. the "Speaker A", "Speaker B" and "Remote" leds on front panel light up;
. after few seconds, the speaker relais switch on.
All the sections (transformer, power supply board, preamp board, phono unit, input/output unit, power amp board) are ok except for the microcomputer board.
Especially, it seems that the microcomputer IC1 (HD63A01V1, rel. 1.725.290.07) and IC2 (PCF84C81, rel. 1.725.290.05) have serious problems, but it's very difficult to me to detect the fault in a more precise way.
Is it a common problem? Any idea about any further investigation I could perform? Where (except for the very expensive Revox jewelry) could I find those ICs?
As usual, thx a lot in advance to everyone
IC-s of these types seem to be quite cheap in eBay but what makes you think that they are any use without Revox software?
Hi madis64,
thx for your kind reply.
You're 100% right, the real problem is to find a Revox-programmed IC....
Alternatively, it would also be great to find a Revox IC and to use it as a master for a software copy into a commercial device.
Of course, Revox is also available to directly supply a refurbished B150. At a crazy price, 2450 eur...
thx for your kind reply.
You're 100% right, the real problem is to find a Revox-programmed IC....
Alternatively, it would also be great to find a Revox IC and to use it as a master for a software copy into a commercial device.
Of course, Revox is also available to directly supply a refurbished B150. At a crazy price, 2450 eur...
Have you contacted them about availability and price? They do sell spare parts. This was in 2020 though, but just to get you a feel...the three MABs and the EEPROM for a Revox H1 (basically a B215) cassette deck set me back just over 100 Euros + shipping. Might be costlier today, just acquire.
Usually the first order of business with old Revox gear is checking/replacing electrolytic capacitors...starting with power supply.
Usually the first order of business with old Revox gear is checking/replacing electrolytic capacitors...starting with power supply.