Shure VA 300 - Manual (Page 17)

VA300-S Speaker Servicing:
1. Unplug cables from speaker jacks.
2. Remove back of cabinet.
3. Disconnect one end of the lead connected between the
two 10 inch loudspeakers.
4. Apply 60 Hz, 1 to 10 volts, to each of the six speakers
individually. Any buzzes or rattles indicate possible
failure. The speakers should all sound generally alike
with a slight difference between the 8 inch and 10 inch
loudspeakers.
5. Using an ohmmeter, measure resistance of the voice-coil
of each loudspeaker individually. Each 10 inch speaker
should measure between 12 and 16 ohms. Each 8 inch
speaker should measure between 5 and 8 ohms. Read-
ings outside of these limits indicate possible failure.
6. Reconnect lead disconnected in Step 3. Install back of
cabinet tightly.
REPLACEMENT PARTS LIST FOR
VA300-S SPEAKER COLUMN
REP. REPLACEMENT KIT CONSISTS OF
I T E M K I T
NO. Q T Y . P A R T N O . DESCRIPTION
M10 RKC29 1 80A207 8 Inch Loudspeaker
M11 RKC56 1 80A208 10 Inch Loudspeaker
M12 RKC31 1 90A1375 Rear Panel Assembly
M13 RKC25 1 94B462 Column Cabinet
M14 RKC4 1 90A1373 Cable and Plug Assembly*
M15 RKC32 1 95A436 Handle Assembly
M16 RKC39 4 65A1001A Bumper (Plastic Foot)
M17 - - 39A279 Name Plate
M18 - - 48A20 Side Rail
*Recommended replacement cable connectors (not available from
factory; Switchcraft part numbers given): Straight Locking Plug: #282;
R i g h t A n g l e L o c k i n g P l u g : # 2 2 8 ; L o c k i n g E x t e n s i o n J a c k ( f o r
Extension Cable Assembly): #123.
Figure 15
Figure 16
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