Welch Allyn GSI 38, Service Manual

Page: 61 / 96

SWITCH PANEL REMOVAL
DISCONNECT REAR PANEL POWER CONNECTOR. REMOVE HL KNOB. OPEN CASE.
DISCONNECT AUDIO/TYMP BOARD CONNECTOR J4. REMOVE THE ADHESIVE CABLE CLAMP
WHICH SECURES THE SWITCH PANEL CABLE BY GRASPING FIRMLY AND GENTLY PULLING
AWAY FROM THE TOP COVER. THE SWITCH PANEL IS SECURED TO THE TOP COVER BY
ADHESIVE BACKING. START LIFTING THE SWITCH PANEL BY INSERTING A SMALL KNIFE
BLADE BETWEEN THE SWITCH PANEL AND TOP CASE AT ANY CORNER. ONCE A CORNER
IS LIFTED GRASP THE PANEL FIRMLY AND GENTLY PEEL AWAY FROM THE TOP CASE.
PRINTER REMOVAL
DISCONNECT ALL REAR PANEL CONNECTORS. OPEN CASE. REMOVE AUDIO/TYMP BOARD.
DISCONNECT J1 AND J2 FROM PRINTER CONNECTOR BOARD. REMOVE PAPER COVER.
REMOVE 2 SCREWS MARKED "F" AS SHOWN IN DRAWING 4. REMOVE PRINTER COVER.
REMOVE PRINTER BY LIFTING REAR OF PRINTER ABOVE THE 2 REAR HOLDING PINS OF
CASE, THEN SLIDE PRINTER TOWARDS THE REAR UNTIL THE PRINTER IS CLEAR OF THE 2
FRONT HOLDING PINS. ONCE CLEAR OF THE HOLDING PINS LIFT PRINTER OUT OF CASE.
PRINTER CONNECTOR BOARD REMOVAL
DISCONNECT ALL REAR PANEL CONNECTORS. OPEN CASE. REMOVE AUDIO/TYMP BOARD.
DISCONNECT Jl & J2 FROM PRINTER CONNECTOR BOARD. REMOVE SCREW MARKED "G"
AS SHOWN IN DRAWING 3.
LCD REMOVAL
DISCONNECT ALL REAR PANEL CONNECTORS. OPEN CASE. REMOVE AUDIO/TYMP BOARD.
REMOVE 4 SCREWS MARKED "H" AS SHOWN IN DRAWING 3. (NOTE: THESE SCREWS ARE
.250 INCHES LONG. INSTALLING LONGER SCREWS WILL CAUSE SCREWS TO PROTRUDE
THROUGH FRONT PANEL!).
PUMP REMOVAL
DISCONNECT REAR PANEL POWER CONNECTOR. OPEN CASE. DISCONNECT J7 & J8 FROM
AUDIO/TYMP BOARD. DISCONNECT PNEUMATIC TUBING FROM PUMP FITTING. REMOVE 4
SCREWS MARKED "K" AS SHOWN IN DRAWING 3 AND DRAWING 5. NOTE: ACCESS TO PUMP
SCREWS WILL BE EASIER IF BOTTOM CASE IS REMOVED. APPLY SLIGHT REARWARD
PRESSURE WHILE LIFTING PUMP FROM CASE TO ALLOW PUMP TO CLEAR SHOCK MOUNT
STANDOFFS.
BOTTOM CASE REMOVAL
DISCONNECT REAR PANEL POWER CONNECTOR. OPEN CASE. LOOSEN 4 SCREWS MARKED
"L" AS SHOWN IN DRAWING 1 BY APPROXIMATELY 3 TURNS. THIS SHOULD ALLOW
SUFFICIENT CLEARANCE TO SLIDE BOTTOM CASE PINS
FROM BETWEEN THE TOP COVER
AND THE HINGE BLOCKS.
60