Shure M67 - MAINTENANCE AND PARTS; LAMP REPLACEMENT PROCEDURE; PRINTED CIRCUIT BOARD ASSEMBLY

* IT IS NECESShRI TO
YELLOW
DISCONNECT,
PIT ONE
END ONLY,
THE THREE
WIRES B CAPACITOR
PRINTED CIRCUIT
MARKED I TO ALLOW
BOARD TO
TILT 90. UP
BOARD ASSEMBLY
FOR SERVICING
FIGURE D
PI 2 RKCtP 1 NPN TWNSISTOR, 86A336, SILICOn, TEXAS IWSTRWNT TIS97.
013'. RIC65 1 NPN TRANSISTOR, 86A334, SILICW, TEXAS INSTRUIEm T1592."
414.' RKCSG 1 PNP TRANSISTOR, 86A331, SILICMI, TEXAS IHSTRWEWT T1593.'.
RKC-1
NOT SH3M(
RKC20 1 CHASSIS COVER.
K1 - K4
RICE 1 BUCK KM8
R9,RlS,R?3,
R35,R44
IK5 RKC6T t GRAY WOB I
. TO INSURE LOW NOlSE FIGURE, PURCHASE REPUCMENIS FOR 41-a11 FROl SHURE BROTI(ERS, IIICORPOR*TED.
" FOR REPLACEMENT, PURCHASE 413 AND 411 AS MTCHED PAIR IIS92LCTIS93H.
LAMP REPLACEMENT
3. DISCOPMECT A.C. CORD.
2.
REMOVE
4 PHILLIPS HEAD SCRNS RETAINING COYER - ONE ON FRONT, ONE Oi BACK, WO ON BOTTDI.
3. REMOVE COVER.
RIU
4. REMOVE VU MTER AS FOLLOWS: ilRST DETEWINE WlCli TYPE W SPRINT. RETAINER IS USED.
WIRE-T~~ SPR~NG RETAINER UN BE IDENT~F~ED BY
APPEARANCE SIMILAR 70 mi iN rIGu& E
4 STRAP-TYPE SPRING RETAINER
IS A BAND OF SPRlNC MATERIAL ABOUT 1/2' WIDE.
5. MAKE A PENCIL MARK ON THE
INSIDE TOP
PURFACE OF EACH METER BRACKET 10 &ID REASSEMBLY.
REMOVE SPRiNG RETAINER.
IF
A rllRE-TYPE RETAINER 15 USED, PUSH D&% CN EITHER EN0
OF THE WIRE AND UNHOOK IT FRW MLTER BRACKET.
IF
d. STRAP-TIPL RETAlNFR 15 USED, PUSH
THE EN0 NEARCST THE PRINTED CIRCUIT BOARD TWARO THE FACE OF Tiii METER AND WHOM
IT
FRDI THE BWCKLT. REMOVE SPRING RETAINLR.
1
6.
GENTLY PUSH VU METER FRW FRONT AND LiiT UP CLEAR OF CHASSIS.
7. REMOVE BWCKETS. NOTE THEiR POSITION IN CUT-WT.
POTENTICMETER 50 K, AUDIO TAPER.
8.
REMOVE SCREWS RETAINING LAMP SOCKETS FRCM WDERSIDE OF CHASSII.
5OCKEII MAY NW BE
PUSHED CLEAR OF CHASSIS AND NEW #17 LAMPS REPUCEO.
ii IS ADVISABLE TO REPLACE BOTH
LAMPS WEN ONE BURNS Om.
9. REPLACE LAMP SOCKETS AND LOOSELY FASTEN SCREWS.
10.
PLACE 2 VU METER BRACKETS iN Cm-OW, PUSHING THEM FIWLY ITAINST SIDES OF CUI-OUT
NOii MARKS MADE iN STEP 5 480YE.
11. SLIDE VU METER INTO CUT-OUT. SH)ULO LAMPS BE IN THE WAY, WYE THEN. VU MLTER SHOULD
FIT EASILY iNiO CW-OUI li POSITIONED PROPERLY. DO NW IOACE.
13.
CHECK POSlTiWiNC OF LAMPS, AND TiCHiiN THEIR 2 MOVNilNG SCREWS
74. REPLACE CWER.
RED
PARTS PLACEMENT
FIGURE E