Service manual

PN 4237242A
4.4-1
SERVICE AND REPAIR PROCEDURES
OPENING THE LOWER CHASSIS
4
4.4 OPENING THE LOWER CHASSIS
1. Open the front door of the instrument.
2. Loosen the captive #2 Phillips-head retaining screw just above the traverse motor
(Figure 4.4-1).
3. Swing the upper chassis up and back and lock the support arms in place.
Figure 4.4-1 Top View into Lower Chassis
AC POWER/VACUUM
RTN
+
RTN
+
V1
-V4 +
-V3 + -2V +
+S
-S
ON/OFF
PF/PG
MOTOR/SOLENOID DRIVER CARD
AC POWER/
VACUUM RELAY
CARD
VACUUM
SENSOR
CARD
MOTOR/SOLENOID
DRIVER CARD
VACUUM
PUMP
FLEX
CONNECT
CARD
LINEAR
POWER
SUPPLY CARD
SENSOR
PREAMP
ADAPTER
CARD
7242019A
RETAINING
SCREW
HGB PREAMP
CARD
SOLENOID
INTERCONNECT
CARD
+24 V
POWER SUPPLY
90° POSITION
45° POSITION
A