Troubleshooting Guide - AMSTRAD MS-45/F Service Manual

TROUBLESHOOTING GUIDE
RECEIVER SECTION
Defect in power supply circuit Check current and voitages.
Replace as necessary.
Defective volume control Check volume control resistance for
continuous operation. —
Replace as necessary.
Defective function switch (SW2) Replace or repair switch.
No sound
Defective detector
Check voltages in this circuit.
Repair/Replace as necessary.
Open circuit in AM IFT ANT Check voltages and resistance.
Coil or Osc. coil (T3, L4/MW, L5/LW) Replace as necessary.
IF misaligned Re-adjust (See Alignment Instructions).
Weak sound
(low sensitivity)
RF misaligned Re-adjust (See Alignment Instructions).
Defective IC2 Check voltages.
Replace as necessary.
Resoider and/or repair.
Replace as necessary.
Poor contact in Antenna circuit
Defective Band switch (SW1)
Repair or replace switch.
Defective in Detector Check voltages.
improper adjustment of VCO Re-adjust R24.
(See Alignment Instructions).
MPX Poor separation
No stereo Indicator | Faulty D4
Check indicator D4 and circuit.
Replace as necessary.
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