BEOGRAM 4000 "Training manual" problem

2 replies
GG
Gravity Graham
Bronze
48 posts
Posted November 21, 2022 at 05:16 GMT
#686866
Hi All, trying to sort out a motor control problem on my BG4000, and on page 3-19 the last line is "You will see from this circuit that if the base of"..... BUT - page 3-20 starts with: "and 1TR32 will be biased in the forward direction, so that control current......." Can anyone enlighten me as to the missing line/s ?? Thanks in advance.. Graham H.

Location: Cornwall, UK

Obtained HND in Electronics Engineering in 1982. Retired in 2016, and am still 'tinkering'. Have had my Beogram 4000 and BeoMaster 1900-2 since 1984.
HC
hcraig244
Silver
2461 posts
Posted November 22, 2022 at 09:11 GMT
#696042
Read on through section 3.21....this gives a full description of the three functions associated with the drive for the transport system, you should be able to test the voltage levels at the associated transistor points when the control panel switches are operated, the notes are a little truncated and "solder ron" may be able to fill in the missing information as they where kindly donated by him. Craig
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