Welch Allyn Traditional Instruments User manual

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Manual Service

Instruments Traditional

PN 117081-1

Manuals

Repair Parts Catalog

Service Manual

Traditional Instruments

Medical Division

4341 State Street Road, P.O. Box 220

Skaneateles Falls, NY 13153-0220

PN 117081-1

Rev	Description of change	ECN#	Date	Initiator

A	New Release	5-34434	1/10/97	R. Settembre

B	Revised and Redrawn, added Sections 17-21	5-40150	8/23/99	R. Settembre

Drawings and/or illustrations and/or part numbers contained in this document are for reference purposes only. For current revisions call Welch Allyn Customer Service 1-800-535-6663.

If during servicing these products, you require further technical assistance, call Welch Allyn.

Traditional Instruments Service Manual

PN 117081-1

	TABLE OF CONTENTS
Section 1 ................................................................	Ophthalmoscope
Section 2 ..................................................................	Strabismoscope
Section3 .......................................................................	Retinoscopes
Section 4 ...........................................................................	Otoscopes
Section 5 ................................	Illuminated Bivalve Nasal Speculum
Section 6 ............................................................	Larynx Illuminator
	Nasopharynx Illuminator
	Larynx Illuminator
	Nasopharynx Illuminator
Section 7 ..............................................................	Tongue Depressor
Section 8 ......................................................	Fiber Optic Anoscopes
	Procto-Sigmoidoscopes
	Fiber Optic Light Head
	Standard Anoscopes
	Rotating Anoscope
Section 9 ..........................................................................	Headlights
Section 10 ...........................................................................	Episcope
Section 11 ....................................................	Laryngoscope Handles
Section 12 .......................................................................	Illuminator
Section 13 .......................................................	Laryngoscope Blades
Section 14 ...............................................................	Battery Handles
Section 15 ..................................................................	Light Handles
Section 16 ..........................................................................	Penlights
	Pocket Lights
Section 17 ..............................	Binocular Indirect Ophthalmoscoope
Section 18 ...........................	Binocular Indirect Ophthlamoscope II
Section 19 .......................................................................	CompacSet
Section 20 ...................................................	CompacSet Ophthalmic
Section 21 ...................................................	767 Wall Transformner

Section 1

OPHTHALMOSCOPES

MODEL #	SUB-SECTION	PAGE
11110	A	1-2,
11400, 11411	B	3
11470, 11475,	C	4
11500, 11511	D	5-6
11600	E	7
11605	F	8
11610	G	9
11620	H	10
11630	I	11-12
11650	J	12-13
11660, 11710	K, L	14
11720	M	15-16
11730	N	17-18
12810, 12813,
12814, 12830	0	19-20
APPENDIX	1	21
APPENDIX	2	22
APPENDIX	3	23
APPENDIX	4	24-26

OPHTHALMOSCOPES

Special Instructions Ophthalmoscope Service:

Clean all returned ophthalmoscopes by wiping with a solution of 10% Clorox / 90% water.

Do not apply alcohol, chemicals or water to the mirror or lenses. Follow disassembly and assembly sequences as printed. Disassembly of the Optical Tube Base is not recommended or covered by this Service Manual. Always begin service work with a thorough understanding of the customer’s complaint and its cause. Avoid overtightening of fasteners by applying light tightening torque.

Notes:	1. “SLP” means “Small Loose Parts” and cautions you to disassemble carefully,
	reducing the chances of losing small, possibly spring-loaded, parts.

2.Use T-10913 for loosening the lock ring.

3.Refer to corresponding diagrams in Welch Allyn Repair Parts Catalog PN 900299.

A.11110 2.5 Volt Halogen Lite Set ™ Ophthalmoscope Disassembly:

A1	Lamp	--	Pull lamp from bottom of optical tube.
A2	Bumper	--	Pull corner, peel back.
A3	Cover Ass'y	--	Loosen retaining ring.
	(Doctor-side)
A4	2 Screws	--	Un-screw 2 screws, (torx 05).
			Remove cover assembly (doctor-side) SLP.

Remove (from doctor-side cover): lens disc, lens dial index spring, magnifier lens.

A.11110 2.5 V Halogen Lite Set™ Ophthalmoscope Cont'd:

A5	Ophthalmoscope	--	Remove:	Horseshoe (PN111026)
	Body Assembly			Numeral Illuminator
				Aperture Disc Assembly
				Index Spring
				2 Screws (Holding the lens holder ass'y)
				Lens Holder Assembly
				Filter Housing and Filter *
				Optical Tube Base
				*Filter is easily scratched.

			** 11110 Reassembly **
A6	Ophthalmoscope	--	Insert optical tube base assembly into ophthalmoscope body.
	Body Assembly		Inspect filter over shiny metal surface and look through filter at
			its own shadow. One side will show a ‘blue’ tint. Place tint side
			of the filter towards the inside of the scope during reassembly.
			When using new replacement filter, remove protective
			polyethylene films 2 sides. Insert filter into filter housing and
			place into ophthalmoscope body with filter housing finger tab
			towards top of the scope. Place lens holder assembly into position
			and fasten with 2 screws. Place index spring onto raised anchor.
			Rounded indexing spring end should face the hub. Place aperture
			disc assembly onto hub with apertures at bottom. Place numeral
			illuminator on top of the center of the aperture disc assembly with
			pivot in hole at base. Place horseshoe over numeral illuminator
			with open end of horseshoe at top as shown in parts diagram and
			notch directly over numeral illuminator.
A7	Cover Assembly	--	Place lens dial index spring onto the raise anchor. (Rounded
	(Doctor Side)		end of indexing spring towards lens disc assembly hub).
A8	Lens Disc Assy.	--	Clean disc. Place disc on hub. (Number side down) engage
			with detent.
A9	Cover Ass'y	--	Place cover onto ophthalmoscope body assembly. Place ring
	(Doctor Side)		onto base with numbers “128” right-side-up. Tighten ring,
			screws. Install bumper.
A10	Lamp	--	Align pin of lamp into groove of lamp socket and press lamp
			in. Test.

End 11110 Reassembly

B	11400 and 11411 2.5 Volt Ophthalmoscope Disassembly:
B1	Bumper	--	Pull corner, peel back.
B2	Back Cover	--	Loosen and remove retaining ring.
	(Doctor-side)
B3	2 Screws	--	Remove 2 screws, (torx .05) separate covers. SLP
			Remove (from doctor-side cover):lens disc, center hub (metal)
			indexing spring, lens retainer, magnifying lens.
B4	Housing	--	Separate housing from optical tube base assembly.
	(Patient-side)
B5	Lamp	--	Pull lamp from bottom of optical tube.

**** 11400 and 11411 Reassembly ****

B6	Cover	--	Insert optical tube base assembly.
	(Patient-side)
B7	Indexing Spring	--	Place spring into position below bumper cut-out of doctor-side
			cover. (Return bend on left side)
B8	Magnifying Lens	--	Place lens into opening of body cover, round side down, flat
			side facing you.
B9	Lens Retainer	--	Place lens retainer on top of lens.
B10	Lens Disc Ass'y.	--	Clean disc. Place disc in cover. (Number side down, engaged
			with detent) place hub in center of lens disc (small pivot side up).
B11	Cover	--	Place cover onto patient-sidecover/optical tube base assembly.
			Install and tighten ring (undercut knurl or smooth edge at bottom)
			screws. Install bumper.
B12	Lamp	--	(Only halogen lamps are available for the 14000).
			Align pin of lamp into groove of lamp socket and press lamp in.
			Test.

End 11400 and 11411

C	11470 and 11475 2.5 Volt Ophthalmoscope Disassembly:
C1	Bumper	--	Pull corner, peel back.
C2	Back Cover	--	Loosen and remove retaining ring.
	(Doctor-side)
C3	2 Screws	--	Remove 2 screws, (torx .05) separate halves.SLP. Remove
			(from doctor-side cover): lens disc, indexing spring and button,
			lens retainer, magnifying lens.
C4	Housing	--	Separate housing from optical tube base assembly.
	(Patient-side)
C5	Lamp	--	Pull lamp from bottom of optical tube.

**** 11470 and 11475 Reassembly ****

C6	Cover	--	Insert un-printed plug (tabs pointing to top of instrument),
	(Patient-Side)		optical tube base assembly.
C7	Indexing spring	--	Place spring into position below bumper cut-out of doctor-side
			cover. (2 tabs on spring facing down).
C8	Indexing Button	--	Place button, into guides beneath spring, flat side to spring.
C9	Magnifying Lens	--	Place lens into opening of body cover, round side down, flat
			side facing you.
C10	Lens Retainer	--	Place lens retainer on top of lens.
C11	Lens Disc Ass'y.	--	Clean disc. Place disc in cover.
			(Number side down, engaged with detent)
C12	Cover	--	Place cover onto patient-side cover/optical tube base assembly.
	(Doctor-Side)		Install and tighten ring (undercut knurl or smooth edge at
			bottom), screws. Install bumper.
C13	Lamp	--	Align pin of lamp into groove of lamp socket and press in. Test.
			End 11470 and 11475

D	11500 and 11511 2.5 Volt Ophthalmoscope Disassembly:
D1	Rubber Hood	--	Pull corner, lift up.
D2	Light Carrier	--	Pry/pull out light carrier assembly and remove condensing
	Assembly		lens and lamp.
D3	Back Cover	--	Loosen/remove set screw first and then ring nut. (Use .035" hex
	(Doctor-Side)		key). Remove light carrier retaining spring from ring nut if
			damaged. Remove base. Remove cover. SLP (Glass lens
			PN106006)
D4	Ophthalmoscope	--	Remove lens disc and small glass lens. Do not remove
	Body		aperture assembly disc now. Clean lens disc. Check tightness
			of the three small brass screws in center of lens disc. (Do not
			disassemble lens disc) SLP clean in ultrasonic bath. Optional
			upgrade: Replace multi-lens disc with acrylic lens disc. Remove
			clear plastic washer (.76" or 19.4mm outside diameter / .45" or
			11.58mm inside diameter, PN 106017) brass insert (disc) from
			hub. Remove lens disc indexing spring detent at top. Un-screw
			screws from mirror holder assembly, and remove mirror
			assembly.
D5	Aperture Ass'y	--	Pull aperture assembly (disc) straight up. Remove small detent
			spring, clear plastic spacer (.75" or 19.19 mm outside diameter
			/ .223" or 5.67 mm inside diameter, PN 106019; not found on
			all 115 scopes)
		** 11500 and 11511 Reassembly **
D6	Ophthalmoscope	--	Insert both detent springs (top spring return bend to the left;
	Body		bottom spring return bend to the right). Place clear plastic
			spacer (small hole) onto hub. Place aperture disc ass’y on hub
			(engage detent spring). Place mirror holder assembly over edge

of aperture disc and fasten with 2 screws. Place clear plastic washer (large hole) and hub insert onto mirror holder assembly hub.

D	11500 and 11511 2.5 Volt Ophthalmoscope Reassembly:
D7	Lens Disc Ass'y	--	Place lens disc assembly onto hub (number side up) and engage
			in detent. Optional upgrade: Acrylic disc PN 116041-502.
D8	Magnifying Lens	--	Place lens (flat side onto lens disc) onto horizontal lens disc and
			position it over the bottom-most number. This will line up with
			opening in doctor-side cover. Gently engage and lower doctor-
			side cover onto the ophthalmoscope body assembly and
			magnifying lens. Make sure the lens is still aligned to fit into the
			hole in the doctor-side cover. Do not chip or scratch the
			magnifying lens.
D9	Base	--	Install base. Temporarily engage the base set screw into the hole
			in bottom of scope casting. Install light carrier retaining spring
			onto base retaining ring nut, and screw the ring nut into the base
			(use Welch Allyn wrench T-11896). Do not thread ring nut into
			the base if the set screw extends into the thread area. This will
			damage set screw and ring nut. Make sure the set screw will not
			interfere with the ring nut by first partially unscrewing the set
			screw. Then tighten the ring nut. Tighten set screw and inspect
			for burrs on set screw head. Install rubber hood.
D10	Light Carrier	--	Cleanlamp,lens.Installlampintolightcarrier.Engagealignment
			pin of lamp into groove of lamp socket. Slide condensing lens
			assembly over lamp. Insert light carrier into base of scope. Test.

End 11500 and 11511

E	11600 3.5 Volt Halogen Ophthalmoscope Disassembly:
E1	Bumper	--	Pull corner, peel back.
E2	Back Cover	--	Loosen retaining ring.
	(Doctor-Side)
E3	2 Screws	--	Remove 2 screws, (torx .05) separate halves. SLP
			From the doctor-side cover, remove: Lens disc, center hub
			(metal) indexing spring, magnifying lens. (Early11600 models
			haveseparateglasslenses(23)inlensdisc,andaglassmagnifying
			lens.) Do not disassemble lens disc for cleaning.SLP Clean in
			ultrasonic bath. Optional upgrade: replace glass lens assembly
			with acrylic lens disc, new cover acrylic magnifying lens.
E4	Housing	--	Separate housing from optical tube base assembly.
	(Patient-side)
E5	Lamp	--	Pull lamp from bottom of optical tube.
			** 11600 Reassembly **
E6	Cover	--	Insert optical tube base assembly.
	(Patient-side)
E7	Indexing Spring	--	Place spring into position below bumper cut-out of doctor-side
			cover. (Return bend on left side)
E8	Magnifying Lens	--	Place lens into opening of body cover, round side down, flat
			side facing you.
E9	Lens Disc Ass'y	--	Clean disc. Check tightness of 3 small brass screws on disc.
			Do not unscrew these 3 screws. Place disc in cover with number
			side down and engaged with detent. Place hub in center of lens
			disc (small pivot side up)
E10	Cover	--	Place cover onto patient-side cover/optical tube base assembly.
	(Doctor-Side)		Tighten ring, screws. Install bumper.
E11	Lamp	--	Align pin if lamp into groove of lamp socket and press lamp in.
			Test.
			End 11600

F	11605 3.5 Volt Halogen Ophthalmoscope Disassembly:
F1	Bumper	--	Pull corner, peel back.
F2	Back Cover	--	Loosen retaining ring.
	(Doctor-Side)
F3	2 Screws	--	Un-screw 2 screws, (torx .05) separate halves. SLP
			Remove (from doctor-side cover): lens disc, indexing spring,
			magnifying lens retainer & lens.
F4	Housing	--	Separate housing from optical tube base.
	(Patient-Side)
	Assembly
F5	Lamp	--	Pull lamp from bottom of optical tube.
			** 11605 Reassembly **
F6	Cover	--	Insert optical tube base assembly.
	(Patient-Side)
F7	Indexing Spring	--	Place spring into position below bumper cut-out of doctor-side
			cover. (Return bend on left side).
F8	Magnifying Lens	--	Place lens into opening of body cover, round side down, flat
			side facing you.
F9	Lens Retainer	--	Place lens retainer on top of lens.
F10	Lens Disc Ass'y.	--	Clean disc. Place disc in cover. (Number side down, engaged
			with detent)
F11	Cover	--	Place cover onto patient-side cover/optical tube base assembly.
	(Doctor-side)		Tighten ring, screws. Install bumper.
F12	Lamp	--	Align pin of lamp into groove of lamp socket and press lamp
			in. Test.
			End 11605

G	11610 3.5V Halogen Coaxial Sealed Ophthalmoscope Disassembly:
G1	Bumper	--	Pull corner, peel back.
G2	Back Cover	--	Loosen retaining ring.
	(Doctor-Side)
G3	2 Screws	--	Remove 2 screws, (torx 05) separate halves. SLP
			Remove: lens disc, indexing spring, magnifying lens retainer &
			lens from doctor-side cover.
G4	Optical Tube	--	Remove optical tube base, filter retainer, filter assembly.
	Base Assembly		SLP
G5	Lamp	--	Pull lamp from bottom of optical tube.
			** 11610 Reassembly **
G6	Ophthalmoscope	--	Inspect filter over shiny metal surface and look through filterat its
	Body Assembly		own shadow. One side will show a ‘blue’ tint. Place tint side of
	(Patient-side)		the filter will be towards the inside of the scope during
			reassembly. (When using replacement filter, remove protective
			polyethylene film 2 sides). Insert filter into filter housing and
			place into ophthalmoscope body with filter housing finger tab
			towards bottom outside of scope. Insert filter retainer, & optical
			tube base assembly.
G7	Indexing Spring	--	Place spring into position below bumper cut-out of doctor-side
		cover. (Return bend on left side)
G8	Magnifying Lens	--	Place lens into opening of body cover, round side down, flat
		side facing you.
G9	Lens Retainer	--	Place lens retainer on top of lens.
G10	Lens Disc Ass'y.	--	Clean disc. Place disc in cover.
			(Number side down, engaged with detent)
G11	Cover	--	Place cover onto patient-side cover/optical tube base assembly.
	(Doctor-side)		Tighten ring, screws. Install bumper.
G12	Lamp	--	Align pin of lamp into groove of lamp socket and press in.

Test.

End 11610

H	11620 3.5V Halogen Coaxial Sealed Ophthalmoscope Disassembly:
H1	Bumper	--	Pull corner, peel back.
H2	Back Cover	--	Loosen retaining ring.
	(Doctor-Side)
H3	2 Screws	--	Remove 2 screws, (torx 05) separate halves. SLP
			Remove (from doctor-side cover): lens disc, indexing spring,
			indexing button, magnifying lens retainer & lens.
H4	Optical Tube	--	Remove optical tube base, filter retainer, filter assembly.
	Base Assembly		SLP
H5	Lamp	--	Pull lamp from bottom of optical tube.
			** 11620 Reassembly **
H6	Ophthalmoscope	--	Inspect filter over shiny metal surface and look through filter at
	Body Assembly		its own shadow. One side will show a ‘blue’ tint. Place tint side
	(Patient-side)		of the filter will be towards the inside of the scope during
			reassembly. (When using replacement filter, remove protective
			polyethylene film 2 sides). Insert filter into filter housing and
			place into ophthalmoscope body with filter housing finger tab
			towards bottom outside of scope. Insert filter retainer, &
			optical tube base assembly.
H7	Indexing Spring	--	Place spring into position below bumper cut-out of doctor-side
			cover.
H8	Indexing Button	--	Place button into guides beneath spring. (Flat side to spring).
H9	Magnifying Lens	--	Place lens into opening of body cover, round side down, flat
			side facing you.
H10	Lens Retainer	--	Place lens retainer on top of lens.
H11	Lens Disc Ass'y.	--	Clean disc. Place disc in cover.
			(Number side down, engaged with detent)
H12	Cover	--	Place cover onto patient-side cover/optical tube base assembly ,
	(Doctor-Side)		tighten ring, screws. Install bumper.
H13	Lamp	--	Align pin of lamp into groove of lamp socket and press
			lamp in. Test.
			End 11620

I	11630 3.5 Volt Halogen Coaxial™ Ophthalmoscope (With Multiplier) Disassembly:
I-1	Bumper	--	Pull corner, peel back.
I-2	Back Cover	--	Loosen retaining ring.
	(Doctor-side)
I-3	2 Screws	--	Remove 2 screws, (tprx 05) separate halves. SLP
			Remove: lens disc, cam, multiplier disc, plastic spring detent.
I-4	Optical Tube	--	Remove optical tube base, filter retainer, filter assembly.
	Base assembly		SLP
I-5	Lamp	--	Pull lamp from bottom of optical tube.
			** 11630 Reassembly **
I-6	Ophthalmoscope	--	Inspect filter over shiny metal surface and look through filter
	Body Assembly		at its own shadow. One side will show a ‘blue’ tint. Place tint
	(Patient-side)		side of the filter will be towards the inside of the scope during
			reassembly. (When using replacement filter, remove protective
			polyethylene film 2 sides). Insert filter into filter housing and
			place into ophthalmoscope body with filter housing finger tab
			towards bottom outside of scope. Insert filter retainer, & optical
			tube base assembly.
I-7	Multiplier Disc	--	Install multiplier disc, baffle side up, lenses at top of doctor-side
			cover.
I-8	Cam	--	Install cam on top of multiplier disc, slotted side up, hole of
			cam engaged over pivot molded into cover.
I-9	Lens Disc Ass'y.	--	Install lens disc, number side down, onto hub, with metal pin
			away from cam ramp.
I-10	Spring Detent	--	Place plastic spring detent into position below bumper cut-out
			of doctor-side cover, smooth side up, detent bumps to engage
			both multiplier and lens disc.

I	11630 Ophthalmoscope Reassembly Continued
I-11	Cover	--	Place cover/disc assembly onto patient-side cover/optical
	(Doctor-Side)		tube base assembly. Tighten ring, screws. Install bumper.
I-12	Lamp	--	Align pin of lamp into groove of lamp socket and press lamp
			in. Test.
			End 11630
J	11650 3.5 Volt Halogen Coaxial ™ Sealed Ophthalmoscope Disassembly:
J1	Bumper	--	Pull corner, peel back.
J2	Back Cover	--	Loosen retaining ring.
	(Doctor-side)
J3	2 Screws	--	Remove 2 screws, (torx 05) separate halves. SLP
			Remove (from doctor-side cover): lens disc, indexing spring,
			indexing button, magnifying lens retainer & lens.
J4	Optical Tube Base	--	Remove optical tube base, filter retainer, filter assembly.SLP
	Assembly
J5	Lamp	--	Pull lamp from bottom of optical tube.
			** 11650 Reassembly **
J6	Ophthalmoscope	--	Inspect filter over shiny metal surface and look through filter
	Body Assembly		at its own shadow. One side will show a ‘blue’ tint. Place tint
	(Patient-side)		side of the filter will be towards the inside of the scope during
			reassembly. (When using replacement filter, remove protective
			polyethylene film 2 sides.) Insert filter into filter housing and
			place into ophthalmoscope body with filter housing finger tab
			towards bottom outside of scope. Insert filter retainer, &
			optical tube base assembly.
J7	Indexing Spring	--	Place spring into position below bumper cut-out of doctor-side
			cover.
J8	Indexing Button	--	Place button, into guides beneath spring, flat side to spring.
J9	Magnifying Lens	--	Place lens into opening of body cover, round side down, flat
			side facing you.
J10	Lens Retainer	--	Place lens retainer on top of lens.

J	11650 Ophthalmoscope Reassembly Continued
J11	Lens Disc Assy.	--	Clean disc. Place disc on hub.
			(Number side down, engaged with detent)
J12	Cover	--	Place cover onto patient-side cover/optical tube base assembly.
	(Doctor-side)		Tighten ring, screws. Install bumper.
J13	Lamp	--	Align pin of lamp into groove of lamp socket and press lamp
			in. Test.
			End11650

K 11660 3.5 Volt Halogen Coaxial™ Autostep Sealed Ophthalmoscope with Multiplier:

Disassembly and reassembly for the 11660 are the same as for the 11630 (as explained earlier on pages 11 and 12). Follow the same procedure but use the correct parts for the 11660.

Basic differences between the 11660 and the 11630 are as follows:

K1 The tube base assembly on the 11660 has a covered aperture assembly and the 11630 does not.

K2 The doctor side cover peep hole on the 11660 does not have a window and the 11630 does have a window.

End 11660

L 11710 3.5 Volt Halogen Sealed Ophthalmoscope:

Disassembly and reassembly of the 11710 are the same as for the 11720 as explained below. Follow the same procedure but use the correct parts for the model you are working on.

Basic differences between the 11710 and the 11720 are as follows:

L1 The 11710 does not have the slide switch/rack and pinion gear mechanism. Instead it has a small square Welch Allyn logo in the place made for the slide switch button.

L2 The 11710 does not have aperture windows on either side of the instrument.

End 11710

M	11720 3.5 Volt Coaxial Sealed Ophthalmoscope Disassembly:
M1	Bumper	--	Pull corner, peel back.
M2	Back Cover	--	Loosen retaining ring.
	(Doctor-side)
M3	2 Screws	--	Remove 2 screws, (torx 05) and separate halves. SLP
			Remove (from doctor-side cover): lens disc, indexing spring,
			indexing button, magnifying lens retainer & lens.
M4	Housing	--	Separate housing from optical tube base assembly. SLP
	(Patient-side)
M5	Switch, Gear,	--	Remove individual components. SLP
	Ball and Spring,
	Rack Assembly
M6	Lamp	--	Pull lamp from bottom of optical tube.
			** 11720 Reassembly **
M7	Switch, Gear	--	Place spring in hole on right side ( base towards you), place
			ball on top of spring. Put rack into position and place gear into
			engagement with rack. Center rack in housing. Put switch in
			slot of tool T-8118 and place switch over spring and ball in a
			centered position. Slide patient-side cover onto T-8118 at the
			switch slot and lower patient-side cover onto optical tube base
			assembly. Check that ball detent is properly engaged when
			switch is moved left and right.
M8	Indexing Spring	--	Place spring into position below bumper cut-out of doctor-side
			cover.
M9	Indexing Button	--	Place button, into guides beneath spring, flat side to spring.
M10	Magnifying Lens	--	Place lens into opening of body cover, round side down, flat
			side facing you.
M11	Lens Retainer	--	Place lens retainer on top of lens.

M	11720 Reassembly Continued
M12	Lens Disc Assy.	--	Clean disc. Place disc on hub.
			(Number side down, engaged with detent)
M13	Cover	--	Place cover onto patient-side cover/optical tube base
	(Doctor-side)		assembly. Tighten ring, screws. Install bumper.
M14	Lamp	--	Align pin of lamp into groove of lamp socket and press lamp
			in. Test.
			End 11720

N	11730 3.5 Volt Coaxial Autostep Sealed Ophthalmoscope (With Multiplier) Disassembly:
N1	Bumper	--	Pull corner, peel back.
N2	Back Cover	--	Loosen retaining ring.
	(Doctor-Side)
N3	2 Screws	--	Remove 2 screws, torx 05) and separate halves. SLP
			Remove: lens disc, cam, multiplier disc, plastic spring detent.
N4	Housing	--	Separate housing from optical tube base assembly. SLP
	(Patient-side)
N5	Switch, Gear,	--	Remove individual components. SLP
	Ball and Spring,
	Rack Assembly
N6	Lamp	--	Pull lamp from bottom of optical tube.
			** 11730 Reassembly **
N7	Switch, Gear	--	Place spring in hole on right side (base towards you), place
			ball on top of spring. Put rack into position and place gear into
			engagement with rack. Center rack in housing. Put switch in
			slot of tool T-8118 and place switch over spring and ball in a
			centered position. Slide patient-side cover onto T-8118 at the
			switch slot and lower patient-side cover onto optical tube base
			assembly. Check that ball detent is properly engaged when
			switch is moved left and right.
N8	Multiplier Disc	--	Install multiplier disc, baffle side up, lenses at top of doctor-side
			cover.
N9	Cam	--	Place cam on top of multiplier disc, slotted side up, with the hole
			of cam engaged over pivot molded into cover.
N10	Lens Disc Assy.	--	Install the lens disc with the number side down, onto the hub,
			with the metal pin facing away from the cam ramp.

N	11730 Reassembly Continued
N11	Spring Detent	--	Place plastic spring detent into position below bumper cut-out
			of doctor-side cover, smooth side up, detent bumps to
			engage both multiplier and lens disc.
N12	Cover	--	Place cover/disc assembly onto patient-side cover/optical
	(Doctor-Side)		tube base assembly. Tighten ring, screws. Install bumper.
N13	Lamp	--	Align pin of lamp into groove of lamp socket and press lamp
			in. Test.
			End 11730

O 12810, 12813, 12814, 12830 2.5 Volt Pocket Scope Ophthalmoscope Disassembly:

SPECIAL NOTE: The12810, 12813, 12814, and 12830 Ophthalmoscopes are similar in repair procedures with the exception of : Aperture combinations for the 12810-12814, and base thread construction for the 12830 export model.

O1	Lamp	--	Pull lamp from bottom of optical tube.
O2	Bumper	--	Pull corner, peel back.
O3	Cover Ass’y	--	Loosen retaining ring.
	(Doctor-side)
O4	2 Screws	--	Remove 2 screws, (use .050" hex key) remove cover assembly
			(doctor-side) SLP. Remove (from doctor-side cover): Lens
			disc,indexingspring(PN128013),lever,multiplierandmagnifier
			link. (These last two items will be installed into the doctor side
			cover during reassembly. During disassembly,however, they
			usually fall off their respective pivots and lay on top of the
			aperture dial assembly.)
O5	Ophthalmoscope	--	Remove N.D.(number dial) filter assembly. (On newer models,
	Body Assembly		this part will not have the small filter on top). Remove
			aperture disc assembly, detent ball and indexing (coil) spring
			(116119), indexing spring (128024). Remove 2 screws holding
			lens holder assembly. Remove lens holder assembly and filter
			assembly.
			** Reassembly **
O6	Ophthalmoscope	--	Insert optical tube base assembly into ophthalmoscope body.
	Body Assembly		Inspect filter over shiny metal surface and look through filter at
			its own shadow. One side will show a‘blue’ tint. Place tint side
			of the filter towards the inside of the scope during reassembly.

(When using new replacement filter, remove protective polyethylene films 2 sides) insert filter into filter housing and place into ophthalmoscope body with filter housing finger tab towards top of the scope. Place lens holder assembly into position and fasten with 2 screws. Place indexing spring (128024) onto raised anchor. Round end of indexing spring should face hub. Aperture disc assembly onto hub, hole in disc at top, apertures at bottom. Insert indexing spring (coil spring PN 116119) into hole and place ball bearing on top of it. Place N.D. filter assembly on top of the center of the aperture disc assembly with filter assembly pivot in hole at base.

O	12810, 12813, 12814, 12830 2.5 Volt Pocket Scope Ophthalmoscope Disassembly Cont'd
O7	Cover Assembly	--	Place lever into position in the ( - ) negative with magnifier lens
	(Doctor-Side)		position, ( - ) side. Place indexing spring (128013) over lever and
			onto the raised anchor. (Rounded end of indexing spring should
			face the lens disc assembly hub as shown in repair parts diagram).
O8	Lens Disc Assy.	--	Clean disc. Place disc on hub.
			(Number side down, engaged with detent)
O9	Multiplier	--	Place multiplier on top of lens disc, engaged with hub, pivot
			facing up, and lenses at the top of the assembly (as shown
			in the repair parts diagram). Connect multiplier to lever with
			magnifier link, thick end of link towards the magnifier,
			and with the curved side towards the hub as shown in the parts
			diagram.
O10	Cover Ass’y	--	Place cover onto ophthalmoscope body assembly. Place ring
	(Doctor-Side)		onto base with numbers “128” right-side-up. Tighten ring,
			screws. Install bumper.
O11	Lamp	--	Align pin of lamp into groove of lamp socket and press lamp
			in. Test.

End 12810, 12813, 12814, 12830

APPENDIX 1

TOOLS/MATERIALS/SUPPLIES

OPHTHALMOSCOPE: 11110, 11400, 11411, 11470, 11475, 11500, 11511, 11600, 11605, 11610, 11620, 11630, 11650, 11660, 11710, 11720, 11730, 12810, 12813, 12814, 12830.

Bayonet Pliers (For removing lamps)	Welch Allyn T-10802
Strap Wrench	Welch Allyn T-10913
Ring-Nut Wrench (‘TEE’Handle)	Welch Allyn T-11896
Switch Tool	Welch Allyn T-8118
T5 Torx Flag Style WHA #30-13 Torx ™	Bit # 440-TX-05 or Torx Screwdriver (Torx .05)
Replaceable-Bit 1/4" Driver (APEX M-1505-P)For use with Torx .05 bit
Tweezers ( Grobet Peer #7 Stainless Steel )
12" X 12" (approximately) Foam Pad (Mouse Mar American Covers Inc.)
Windex ™ Glass Cleaner or Vestal Glass Cleaner #8618-21
Lint Free Wipes / Swabs
Jewelers Screwdriver With 1/16" Flat Blade
Small Ultasonic Bath ie:* Pro-Craft Model 23.577-1
Ultra Sonic Bath Cleaning Solution
Miller Stephenson Aero-Duster #MS-222
De-Ionized Water.
Small Stainless Steel Tubs (1 QT. Capacity or less)

One each of the following items: Taps are used to clean up threads or open the hole up to the next size where permissible.

TAP/DRILL/KEY: TAP	DRILL	KEY
2-56	#50 (.0700")	.035"
3-48	#47 (.0785")	.050"
4-40	#43 (.0890")	.050"

APPENDIX 2

Inspections for Repaired Ophthalmoscopes:

1.Operate all slide switches.

2.Rotate knobs and discs to determine whether or not detents are operating correctly and operating smoothly, positively, and through full stroke.

3.View through the scope to determine that the aperture, filter, or lens are correctly aligned through each detent position.

4.Inspect the cleanliness and condition of the lens dial. No scratches, dirt, glue, or any material should be visible.

5.Check the illuminated and non-illuminated numbers on the lens dial. They should be in the center of the aperture.

6.Check projected images for shadows, dirt, and filament images using the aperture dial and the slide switch if so equipped.

7.Check windows for cracks, streaks, spots or anything that would obscure the viewed image.

8.Check for any stray light that interferes with looking through the scope. Project a fixation spot into a darkened box. Look through the peephole with a lens setting of ‘0’. There should be no bright streaks in the image, or any light appearing in the dark area surrounding the projected spot.

9.Check the scope for scratches or physical damage before the repair as well as after.

10.Clean the repaired scope and wrap it in a plastic bag to protect it from dust and fingerprint contamination.

APPENDIX 3

Checklist for:

Final Inspection of Ophthalmoscopes

Ophthalmoscope Checklist:		Ref#:		Model:
1.	[] Bumper in place	A02387	(V1)*	all
2.	[] Retaining ring up (body&cover)			all
3.	[] Lens disc turns freely	A02121		all
4.	[] Leave lens disc assy on ‘0’			all
5.	[] Lever does not jump			12810
6.	[] Lamp makes contact w/ handle			all
7.	[] Numbers readable on lens disc	A02121		all
8.	[] No cracks in cello when illuminated			116 & 115
9.	[] No glare with filters	A02387	(V8)**	all w/filter
10.[] Filter window is secure		A02787	(V8)	11720 & 30
11.[] Retainer secure in mirror assembly		all
12.[] Filter assy. not catching on mirror				all w/mirror
13.[] Lens clarity		A02121		all
14.[] Aperture turns freely				all
15.[] Aperture on large circle				all
16.[] Filter window open				all

*V1=visual measurement (repair operator judgement)

**V8=remove from fixture or handle and apply General Electric RTV #108 to adjustment hole. (clear translucent silicone sealant, WA M#30313).

APPENDIX 4

Troubleshooting Ophthalmoscopes

Model #'s: 11400,11411, 11610, 11620,11630, 11650,11660

Problem					Cause			Corrective Action

Dirty Optics		Normal use					Clean optics but do not use alcohol
							on 116	series.

Obstruction in viewing area		Heavy dirt or scratch on lens disc.					Replace	lens		disc.
		Filter			Assembly:
		a)		discolored			Replace	filter		assembly.
		b)		scratched			Replace	filter		assembly.
		c)		fingerprinted			Clean
		Mirror hood bent up					Replace	mirror.

Apart		Insert pulled out from overtightning					Replace	body		set.
		of	screws.
		User		disassembled.			Replace missing or damaged parts
							and reassemble.

Glare		Dirt or scratches on:
‘Reflection of extra light seen		a )	m i r r o r
through Oph. with filter down.”		b)	filter				Clean parts		if	dirty.
		c)		objective lens			Replace	if	scratched.
VOTE: Plastic	lenses
[objective lens	and filter)
scratch easily. To clean, use a
soft lens paper and or cotton
swab.

Shadows on light spot		Dirty		Optics			Clean
		Lamp			filament	asymmetrical.	Turn lamp around to opposite slot in
							sleeve or replace if this does not
							remove	shadows.
		Lamp			envelope	dirty.	Clean with soft cloth.
		Loose			condensing lens or		Check lens (tap with small needle
		retaining ring.				Condensed lens	and check for movement if loose).
		tipped.					Press down to tighten. Lens should
							be flat. If tilted it will project light “off
							center”.
		Scratch or chip					Replace	condensing lens on
							condensing		lens.
		Objective lens				loose	Remove retaining ring from mirror
							mount and reset. (Refer to mirror
							assembly procedure).
		Wrong			lamp		Replace	with		correct lamp.

Welch Allyn Traditional Instruments User manual

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