DX-390  (200-0214)            Troubleshooting          Faxback Doc. # 3613

Your receiver should give you years of trouble-free service if you follow
the care instructions given in this manual.  If you have problems, the
chart below might help you solve them.

If you still have problems after following the suggestions below, take the
receiver to your local Radio Shack store where our personnel will assist
you and arrange for service if needed.

┌──────────────────────────────┬─────────────────────────────────────────┐
│    PROBLEM                   │                 CAUSE                   │
├──────────────────────────────┼─────────────────────────────────────────┤
│  Display is dim, incorrect   │  Primary and back-up batteries are weak │
│  or does not appear.         │  or dead.                               │
│                              │                                         │
│                              │  Temperature or humidity is too high.   │
├──────────────────────────────┼─────────────────────────────────────────┤
│  E flashes on the display.   │  Receiver is not connected to a primary │
│                              │  power source.                          │
│                              │                                         │
│                              │  You are using batteries as the primary │
│                              │  power source and the batteries are     │
│                              │  weak or dead.                          │
├──────────────────────────────┼─────────────────────────────────────────┤
│  No sound.                   │  The primary-power batteries are weak.  │
│                              │                                         │
│                              │  VOLUME is set too low.                 │
│                              │                                         │
│                              │  Headphones are plugged into the        │
│                              │  receiver.  (This disconnects the       │
│                              │  receiver's internal speaker.)          │
│                              │                                         │
│                              │  AC or DC adapter is not firmly plugged │
│                              │  in.                                    │
│                              │                                         │
│                              │  AC or DC adapter is plugged into the   │
│                              │  receiver but not plugged into power    │
│                              │  source.  (Plugging an adapter into the │
│                              │  receiver automatically disconnects the │
│                              │  primary-power batteries.)              │
├──────────────────────────────┼─────────────────────────────────────────┤
│  Weak or intermittent sound. │  The primary-power batteries are weak.  │
│                              │                                         │
│                              │  Antenna needs adjusting.               │
│                              │                                         │
│                              │  Metal is blocking the signal.  Move the│
│                              │  receiver near a window when you use it │
│                              │  inside a vehicle or metal frame        │
│                              │  building.                              │
│                              │                                         │
│                              │  Frequency needs fine tuning.           │
├──────────────────────────────┼─────────────────────────────────────────┤
│  Scan stops where there is   │  This is caused by birdies -- internally│
│  no clear signal.            │  generated signals mixed with external  │
│                              │  signals.  Using an outdoor antenna     │
│                              │  might reduce these signals.  The       │
│                              │  following frequencies are prone to     │
│                              │  birdies.                               │
│                              │                                         │
│                              │  450 kHz                                │
│                              │  3,844 kHz                              │
│                              │  9,000 kHz                              │
│                              │  10,250 kHz                             │
│                              │  18,000 kHz                             │
│                              │  20,490 kHz                             │
│                              │  21,835 kHz                             │
│                              │  21,868 kHz                             │
├──────────────────────────────┼─────────────────────────────────────────┤
│  Frequency does not change   │  FAST/FINE/LOCK switch is set to LOCK.  │
│  when you turn ROTARY TUNING.│                                         │
├──────────────────────────────┼─────────────────────────────────────────┤
│  ROTARY TUNING and front-    │  If LOCK appears on the display, the    │
│  panel buttons do not        │  lock switch is set to LOCK.            │
│  respond.                    │                                         │
└──────────────────────────────┴─────────────────────────────────────────┘

(ALL-12/13/94)