Moog Satellite - Page 27

SYMPTOMS PROBABLE *
Sample & Hold 14. Pitch Voltage
drifts
15. OSC not running Current source
Relaxation OSC
16. Sawtooth, not
to spec.
Isolation amp
or Schmitt trig
17, High frequency
OSC on sawtooth
Isolation Amp
18.
OSC running very
high frequency
Current source
19. Osc. running out
of frecruency ad¬
justment range
Summing amp
20.
Osc. has severe f
freq. drift
problems
21.
Scale will not
adjust
Summing- amp
22.
One octave tab
will not set up
Wiring
Summing amp
CORRECTION
1. Replace Q51, IC10, C5
2. Replace Q3
3. Check trig circuits
1. Replace IC11, IC21
2. Check R19, R28 '
3. Replace ICS
4/ Check R17, R18, R16 , R14
5. Check R13, R12, Rll, R9, R20.
R48, R24 r R25
6. Check pin 6 ICS for OV
DC ±100 mv
1. Replace C38, Q45, IC12, Q46,
043, Q44
2. Check R31, R38 R39, R37,
R40, R36 , R33 R34, R35, C17
1. Replace IC12,T.Q36, Q43, 044
2. Check R37 , R36. R40 R35, R34
8. Check R39, P.31, 045, R41, R4 3
1. Replace C17, IC12, 046, R35
2. Check R36, R41, R43
1. Replace' IC11, R14
2. See osc not running section
1. Check R16, R14, R17, R18,
P.12, R48, Rll, R9, RIO, C 38
2. Check tune control
3. See osc. not running section
1. Check power supply
2. Check keyboard voltage
3. Check other control inputs
4. See osc. not running section
1. Check R17. R18, R14, R48
2. See 19
1. Check one octave switch
1. Check R9, RIO
2. Check keyboard voltage
3. See 21