Pwb-Ballast Removal; Optical Engine Assembly Removal & Disassembly - Mitsubishi Electric WD-73C1 Service Manual

MODELS: WD-73640 / WD-73740 / WD-73840 / WD-73C11 / WD-73CA1 /
Note: To remove the PWB-BALLAST, it is not necessary to remove the Engine or Lamp Cartridge.
1. Release the Latch to lift the PWB-BALLAST up from the mounting bracket.
2. Slide the PWB-BALLAST out of the Engine Assembly.
3. Disconnect the electrical locking connectors indicated.
4. To reinstall, first connect the connectors. Then slide the PWB under the Retaining Hooks. Then press the rear
edge of the PWB down onto the guide pins to engage the latch.
OPTICAL ENGINE ASSEMBLY - REMOVAL & DISASSEMBLY
OPTICAL ENGINE ASSEMBLY REMOVAL
1. Disconnect the PL connector from the side of the PWB-POWER.
2. Disconnect the FB connector from the side of the PWB-MAIN.
3. Loosen the wiring harnesses from the looms.
WD-82740 / WD-82840 / WD-82CB1 / WD-92840

PWB-BALLAST REMOVAL

RETAINING
HOOKS
CJ4 (HV to Lamp)
CJ3 (Lamp Control)
PL (Lamp Power)
FB
(Lamp Control and Lamp Door Switch)
Page 10
CJ1 (Lamp Power)
LATCH