JVC 370 SC, 330, 340 SC service manual Pos, Input, Neg, Output

Chapter 4—Maintenance

Table 4-1Ignitor Connections for Model 330 Projector

Ignitor	Location on	Wire Color	Wire goes to:
Terminal	Ignitor
POS	Right Side of	Red	J504 (+) terminal on
INPUT	Ignition Coil		System Power Supply.
NEG	Negative Terminal	Black	J503 (-) terminal
INPUT	Lug mounted on	(on J503	on System Power Supply.
	circuit board	side)
NEG	Negative Terminal	Black	Terminal
INPUT	Lug mounted on		on rear of Arc Lamp.
	circuit board
POS	Left Side of	White	Enters middle
OUTPUT	Ignition Coil		of Arc Lamp Housing.

Model 340SC and 370SC Ignitor Assy/Arc Lamp Assy (P/N 104651 or 104120) Removal

To remove the Ignitor Assembly or Xenon Arc Lamp from a Model 340SC and a Model 370SC Projector:

Refer to Figure 4-4and Figure 4-5throughout the procedure below and to establish right and left orientation. Label any connectors prior to removing to ensure they are reconnected correctly.

1.Turn power off at the remote and circuit breaker and unplug the projector. Do not attempt to remove or replace the Arc Lamp assembly without first ensuring that power is off and the projector is unplugged from the AC wall outlet.

2.Remove the front and rear projector covers (Section 4.2).

3.Put on protective clothing, including safety goggles and face shield.

4.Disconnect the black and red Arc Lamp high voltage cables from System Power Supply J503 and J504 and untie the J505 cable that is wrapped around J503. Do not unplug this cable from J505—it is wrapped around J503 to keep it in place in case it must be removed in order to replace the System Power Supply.

5.Disconnect the fan connector at the left front of the Arc Lamp housing.

6.Disconnect the cable from the Squirrel Cage blower on the right side of the Arc Lamp housing.

7.Remove the Start Capacitor from the bracket adjacent to the Arc Lamp assembly (one nut underneath the capacitor).

8.Cut the cable tie wrap (not shown in Figure 4-4or Figure 4-5)at the bottom rear of the Arc Lamp assembly (beneath the fan on the bottom rear of the Arc Lamp assembly).

9.

4-8 Model 330. 340SC, 370SC Service Manual