SERVICE MANUAL
Malfunction |
| Check |
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TIMER does not operate | 1. Check the VARIABLE RESISTOR for |
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| correct operation and install a new part if |
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| necessary. |
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| 2. | Move the TIMER BUTTON forward and |
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| backward; use a DVM to check for changes |
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| in W. |
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| 3. | Energize the projector and move the TIMER |
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| to “S”. |
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| • Check the voltages on CR3, Q3, and |
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| Q4, see the voltage table. |
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DARK SHUTTER SWITCH does not operate | 1. | Energize the projector and release the |
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| DARK SHUTTER to allow projection. |
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| 2. | Check for continuity between PINS 4 and 5 |
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| on the SPECIAL APPLICATIONS PLUG. |
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| 3. | Press the “FORWARD” or “REVERSE” |
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| BUTTONS to close the DARK SHUTTER. |
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| 4. | In the closed position, the DVM should |
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| measure 0 W. |
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| 5. | If this procedure does not correct the |
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| malfunction, install a new DARK SHUTTER |
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| SWITCH. |
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After the FOCUS MOTOR energizes and | 1. Remove R3 and install a new 68K W 1/4 W |
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moves, the FOCUS MOTOR oscillates. |
| RESISTOR (part 220040). |
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| 2. | If there is still a malfunction, install a new |
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| PHOTOCELL. |
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Focus Malfunctions |
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Malfunction |
| Check |
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No manual focus | 1. Check the FOCUS SHAFT SPRING for the | |
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| correct tension. |
| 2. | Check the LENS SUPPORT SPRING for |
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| correct tension. |
| 3. | Check the LENS DRIVE GEAR on the |
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| FOCUS SHAFT ASSEMBLY for damage |
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| and install a new part if necessary. |
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No remote focus (Non Auto Focus models) | 1. Check the REMOTE CORD for damage; | |
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| use a REMOTE CORD that has no |
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| damage. |
| 2. | Actuate and hold the REMOTE CONTROL. |
| 3. | Check that the voltage across the FOCUS |
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| MOTOR is 6.7 V AC. If the voltage is |
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| correct, install a new FOCUS MOTOR. |
| 4. | Check that the secondary voltage on the |
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| MAIN MOTOR is correct. |
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48 | 18NOV97 – |
