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. |
| 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. |
| 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. |
| 2. | Check for continuity between PINS 4 and 5 |
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| on the SPECIAL APPLICATIONS PLUG. |
| 3. | Press the “FORWARD” or “REVERSE” |
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| BUTTONS to close the DARK SHUTTER. |
| 4. | In the closed position, the DVM should |
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| measure 0 W. |
| 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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ZERO POSITION SWITCH does not operate | 1. | Deenergize the projector. |
| 2. | Check for continuity between PINS 1 and 3 |
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| on the SPECIAL APPLICATIONS PLUG. |
| 3. | Install a SLIDE TRAY. |
| 4. | Rotate the SLIDE TRAY to engage the |
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| ZERO POSITION SWITCH, the DVM |
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| should measure 0 W. |
| 5. | If the W measurement is not correct, see |
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| the adjustment for the ZERO POSITION |
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| SWITCH. Install a new ZERO POSITION |
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| SWITCH if necessary. |
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After the FOCUS MOTOR energizes and | 1. Remove R3 and install a new 68K W 1/4 W | |
moves, the FOCUS MOTOR oscillates. |
| RESISTOR (part 220040). |
| 2. | If there is still a malfunction, install a new |
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| PHOTOCELL. |
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50 | 30APR96 – |
