Welch Allyn 767 Service Manual

3.5 V WALL TRANSFORMER DISASSEMBLY:
76710, 76712, 76714, 76716, 76720,
76722, 76724, 76726, 76730,
Refer to corresponding diagrams in Welch Allyn Repair Parts
catalog. (This system is designed for 3.5 volts only.) Clean all
returned sets by wiping with a soft cloth dampened with a solution
of 10% Clorox / 90% Water.
767 to understand customer complaints and causes of problem.
Please contact Welch Allyn directly for clarification of any
service, safety, or use related issues for any Welch Allyn product
including the 767 Wall Transformer.
WARNING! DISCONNECT WALL TRANSFORMER FROM MAINS BEFORE SERVICING.
CAUTION: PULL HALVES OF CASE APART CARFULLY TO AVOID UNNECESSARY
DISCONNECTION OF INTERNAL PLUG-IN WIRE CONNECTORS.
LISTING OF REMOVAL/REPLACEMENT PROCEDURES:
A POWER CORD
B HANDLE ASSEMBLY (HANDLE AND COILED CORD WITH MOLEX PLUG)
C CIRCUIT BOARD
D FUSES
E CRADLE ASSEMBLY
F ILLUMINATED SWITCH
G CLOCK AND CLOCK BATTERY
H THIRD HANDLE SERVICE
APPENDIX: TOOLS, TESTING/INSPECTION/TEST PROCEDURES FOR
REPAIRED 767'S, REPAIR CATALOG PAGES.
A POWER CORD REPLACEMENT:
ABSTRACT:
UNPLUG POWER CORD FROM BOTTOM OF WALL TRANSFORMER UNIT.
REFER TO 767 WALL TRANSFORMER INSTRUCTIONS PN767036
B HANDLE ASSEMBLY REPLACEMENT:
ABSTRACT: THE HANDLE ASSEMBLY (HANDLE AND COILED CORD) IS
DESIGNED TO BE REPLACED AS A COMPLETE SUB-ASSEMBLY.
MAIN HOUSING-FRONT,(MH FRONT), IS REMOVED AND THE HANDLE IS
UNPLUGGED FROM THE CIRCUIT BOARD. THE WIRES TO THE POWER
SWITCH AND THE OPTICAL SENSORS IN THE CRADLES ARE NOT
UNPLUGGED.
767 Wall Transformer
SERVICE MANUAL
Begin with a thorough inspection of the
(STANDARD LENGTH & 16"DOMESTIC ,EXPORT)
* * * * *
IEC CONNECTOR ACCEPTS NEW PLUG. NO-DISASSEMBLY.
* * * * *
WEAR ESD STRAP TO PROTECT PCB.
1
PN 767051 REV B
COPYRIGHT 4/95
WELCH ALLYN INC.
ECN NO 5-30199
cdfl:767052B.WP5
Originator: RJS
THE