Midland Radio SP-300 - Manual (Page 29)

MAXON
SP-300 HAND HELD
Page -26-
May 2001
VOLTAGE CHARTS
z NOTE: Q402 and Q409 are not fitted on this model series.
z NOTE: Q9, 10, 15, 19, 20, 23 and 28 - 32 are not fitted on this model series.
z NOTE: ~ indicates approximate voltage. Actual voltage may vary.
CONTROL CIRCUIT
RX TX
REF # B C E B C E
Q401 4.4 0.0 5.0 0.3 5.0 5.0
Q403 0.0 4.6 GND 0.0 4.6 GND
Q404 5.0 2.2 2.0 0.0 7.0 0.0
Q405 5.0 1.8 1.7 5.0 1.8 1.7
Q406 4.0 0.0 5.0 2.0 5.0 5.0
Q407 0.0 4.5 GND 5.0 0.0 GND
Q408 0.0 5.0 GND 2.0 0.0 GND
Q410 4.3 0.0 5.0 4.3 0.0 5.0
Q411 0.0 - GND 0.0 0.0 GND
Q412 0.0 7.5 7.5 0.0 7.5 7.5
Q413 7.5 0.0 GND 7.5 0.0 GND
MAIN CIRCUIT
RX TX
REF # B C E B C E
Q1 0.6 5.0 5.0 0.6 5.0 5.0
Q2 5.0 0.0 5.0 0.3 4.7 5.0
Q3 0.0 4.7 5.0 5.0 0.0 5.0
Q4 0.0 5.0 5.0 0.0 5.0 5.0
Q5 4.7 0.0 5.0 4.7 0.0 5.0
Q6 4.0 18.0 5.0 4.0 18.0 5.0
Q7 18.0 ~3.0 18.0 18.0 ~4.0 18.0
Q8 5.0 0.0 5.0 5.0 0.0 5.0
Q11 0.0 3.0 0.0 0.0 4.0 0.0
Q12 1.6 4.5 1.0 0.0 0.0 0.0
Q13 4.6 4.6 4.0 0.0 0.0 0.0
Q14 0.0 0.0 0.0 4.6 4.6 4.0
Q16 0.0 0.0 0.0 1.4 4.8 0.8
Q17 0.0 0.0 0.0 0.6 3.0 GND
Q18 0.0 0.0 0.0 5.0 0.2 GND
Q21 0.0 0.0 0.0 ~3.0 ~5.6 ~2.4
Q22 7.5 0.0 7.5 6.9 ~7.0 7.5
Q24 0.0 4.5 GND 0.0 0.0 GND
Q25 0.7 4.0 GND 0.0 0.0 GND
Q26 - - - 0.0 0.0 0.0
Q27 0.7 NOISE GND 0.0 0.0 GND
Q33 7.2 4.0 7.5 6.9 7.5 7.5
Q34 0.0 6.6 GND 2.0 0.0 GND