Heathkit IM-4180 - Page 17

Page 54
Charts” to see if the difficulty you are having is listed
liven Maow witcivercs volriroubleiein seplydhe: iaigae ative (Goadition columua, your cuicelty
“Visual Checks’ to that area. is listed there, check the ‘‘Possible Cause” column
listed for that item and apply the visual check to the
You may also go directly to the ‘“Troubleshooting area of difficulty.
This “Troubleshooting Chart’ lists specific difficul- | Refer tothe “Circuit Board X-Ray Views’ (Illustration
Hes aaat pou occur a your Deviation Meter. Several Booklet, Page 11) to locate and identify parts.
2. Dead batteries.
3. Charger/Eliminator not connected.
1. | Deviation Meter does not operate. |
Datian: alin Innan
May Vil veo. ]
2. | 8-volt regulator will not adjust. | 1. Control R186. |
2 Integrated circuit U10B.
3. Capacitors C101 or C154.
3. Deviation readings too high or too low. | 1. Recalibrate instrument (See “Main Circuit Board Calibration,” |
Page 45.) moons
4. Batteries test out of “Battery” area on meter. | 1. Recharge batteries. |
2. Replace lead-acid or alkaline batteries.
5. Batteries will not charge using Battery | 1. Charge switch SW102 not in CHARGE position. |
Charger/Eliminator. 2 Diode D108.
6. | No deviation reading (SPKR and SCOPE outputs OK). 1. Diode D107. |
2. Meter.
| | 3. Capacitor C143. |
4. integrated circuit U106.
7. No SCOPE output (deviation reading OK). 1. Resistor R154. |
2. Coil L102.
| 3. Capacitor C133. 7 |
8. | Tune function works but will not peak. 1. Coil L104.
9, |
10. | Unit lacks sensitivity l- 1 Contro! Ri1. |
2. Diode D262.
| 3. Transistors Q101, Q201, or Q202. |
11 | FINE TUNE control inoperative. | Control R3. |
e 1.
| 2. Capacitor C154. |
| 3. Diode D207.