Service manual
REPLACEMENT PARTS LIST FOR PM300 SERIES AMPLIFIERS
Item
C1
C2
D1-D4
D5, D6
D7, D8
F1
F1
**
Repl.
Kit No.
RKC26
RKC27
RKC46
RKC50
RKC23
RKC62
---
F1
---
F2
RKC62
F2
---
F3
---
I1
I1
I2
J1-J4
M1
RKC45
RKC78
RKC34
RKC68
RKC82
M1
M1
RKC88
---
M2
M3
RKC69
RKC70
M4
M5
M6
M7, M8
M7, M8
---
RKC39
RKC49
RKC72
---
M9
---
M10
Q1-Q2
---
RKC9
Q3
Q4
Q5
RKC53
RKC55
RKC54
Q6-Q9
---
R1
R2
R3-R6
R7
R8
S1
RKC47
RKC73
---
---
---
RKC61
S1
---
S2, S3
S4
RKC37
---
T1
T1
T2
RKC35
RKC147
RKC28
Replacement Kit Consists of:
Qty. Part No.
86A631
Description
1
1
4
2
1
5
-
-
5
-
-
1
1
2
1
1
1
-
1
1
1
4
3
1
-
-
-
4
1
1
1
-
1
1
-
-
-
1
-
1
-
1
1
1
86B631
86A406
86A410
86A409
80A159
80A258
Capacitor, 2500 x 100
Capacitor, 4000 x 60
Silicon Rectifier, 3A., 200 V.
Silicon Rectifier, ½A., 100 V.
Zener Diode, 3.6 V., 1 W., 5%
A.C. Fuse (PM300 and PM300E)
A.C. Fuse (PM300E6 only)
Commercial Alternate
None
None
Motorola No. 1N4721
Motorola No. 1N4002
Motorola No. 1N4729A
Littelfuse 3AG/3A/SB (Slo-Blo)
Wickmann 5 x 20mm 1.6 AT, 250 V.
80B258
Wickmann 5 x 20mm 3.0 AT, 250 V.
80A160
80A259
80A269
for 200-240 volts
A.C. Fuse (PM300E6 only)
for 100-140 volts
D.C. Fuse (PM300 and PM300E)
D.C. Fuse (PM300E6 only)
Wired in A.C. Fuse (PM300 only)
80A79
80Z251
90A1463
95B446
95A510
Pilot Lamp (PM300 only)
Pilot Lamp (PM300E and PM300E6)
Lamp Assembly
Phone Jack
3 Wire A.C. Line Cord and Plug
(PM300 only)
Littelfuse 3AG/5A
Wickmann 5 x 20mm 5.0 A, 250 V.
Bussmann MDV/5A/SB (Slo-Blo)
Pig-Tail
Leecraft No. 36N1311-6
Leecraft No. 36HN-1311-7W
None
Switchcraft No. 11
None
70A3071
90A1888
Line Cord (PM300E only)
Line Cord and Connector
(PM300E6 only)
Housing Assembly (Cover and
Spindle)
None
None
90A1681
None
32A627
None
90BC2600
65A685
90B2285
95A500
95A604
Knob and Screw (Line Cord
Storage Spindle)
Handle and Nuts
Bumper (Plastic Foot)
Volume Control Knob Assembly
Fuse Holder (PM300 and PM300E)
Fuse Holder 5x20 mm (PM300E6
only)
Bud No. H9115
None
None
Littelfuse No. 341001
Schurter Type FEB
95A568
A.C. Chassis Power Connector
(PM300E6 only)
Input Interconnecting Cable
Transistor (Replaces 86A327)
Switchcraft No. EAC-301
90A1522
86A349
86A333
86A338
86A339
86B339
86A332*
86B332*
45A38
46A025
45EC439B
45EC209B
45EC129B
55A72
Transistor 110 V. BV
CEO
Min.
Transistor 110 V. BV
CEO
Min.
Transistor 105 V. BV
CEO
Min.
(Mutually Interchangeable)
Transistor 110 V. BV
CEO
Min.
None
Motorola No. MPS-6521,
Texas Inst. No. 2N3711
RCA No. 40349
RCA No. 2N3441
Motorola No. 2N3741 Selected
RCA No. 2N3773
95A551
55A99
150 W.
Resistor
Potentiometer, 50K.
Resistor, 0.43 ohms, 5 W.
Resistor, 0.20 ohms, 5 W.
Resistor, 0.12 ohms, 5 W.
Toggle Switch (PM300 and
PM300E)
Toggle Switch, 2 position
(PM300E6 only)
Thermostat
Voltage-Selector Switch
(PM300E6 only)
Power Transformer (PM300 only)
Power Transformer (PM300E and
PM300E6)
Feed back Transformer
Workman No. FRT-2
None
None
None
None
Cutler-Hammer No. 7563K5
55A98
Marquardt Type No. 0132
None
None
51A215
51A241
None
None
51A217
None
NOTE:
The Commercial Alternates shown above are not necessarily equivalents, but may be used in the event that direct factory replacements are not
immediately available. To maintain the highest possible performance and reliability, Shure Factory Replacement Parts should be used.
*When ordering 86A332 or 86B332, specify current gain code. See page 6.
**Parts listed as RKC Kits should be ordered by that kit number. Any orders received for piece parts where RKC Kit number is shown will be shipped in RKC quantities.
8