Rolls RA2200 - SCHEMA User Manual

1
ROLLS CORPORATION
5968 S 350 W
MURRAY, UT 84107
1
RA2200b.SCH B
16 SEPTEMBER 1993
Title
Size: Document Number:
Date:
Rev:
Sheet of
RA2200 MOSFET POWER AMP
Rb
3 PIN JUMPER
Vr+
Vr+
Vr-
Vr-
Vr+
Vr-
TO CH 2 E1
TO CH1 OUT JACK
RED
BLACK
BRIDGE SWITCH
+60V
-60V
SIGNAL OUT
SET P2 FOR .5 - 1 MV ACCROSS R18
V+
V+
1
5
32
100
R2
10K
R1
10K
R3
10K
P1
P100K
D1
1N4148
J2
RCA PC
R6
1K
R21 3.3K
D2
ZD12V
D3
ZD12V
C4
.01
C5
1U
C7
10U
C9
.047
Q2
2N4124
R38
1M
Q1
J113
C2
470PF
R5
10K
C3
1U
C8
10U
D4
LED
P2
50K TP
D5
1N4148
R27
2K
R31
1K
D7
1N4148
R30
2K
Q7
MPSA56
1 2
SW1
SPST AC
2
B
3
C
1
A
1
A
HDR4
2
B
HDR4
3
C
HDR4
1
A
HDR4
2
B
HDR4
3
C
HDR4
4
D
HDR4
R14
150
D8
1N4148
Q8
IRF9530
Q9
IRF9530
Q13
IRF530
Q14
IRF530
R28
330
D6
1N4148
R29
330
R48
100
C12
.001
6
5
7
8
U1B
LF353
2
3
1
4
U1A
LF353
R10 10K
R8
470
R9
10K
T1
AVEL 4053
3
1
2
SW2
SPST
J3
PHONE 1/4
R25 .05
R40
1K
R41
51
R42
51
R43
51
R44
51
Q10
PN200
R37
4.7K
R47
10K
R45
4.7K
Q3
2N4124
R46
10K
Q6
MPSA06
R26
1K
R18 .05
J1
PHONE 1/4
R4
1K
C1
470PF
R7
100K
R39
1M
R15
3.3K
R17
3.3K
C?
.1
P1
PLUG AC MALE
R31
10K
R32
100K
R33
10K
R34
100K
R35
10K
R36
100K
R37
33K
D7
LDRY
D8
LDRG
D9
LDRG
D10
LDRR
Q11
2N3904
Q12
2N3904
Q13
2N3904
Q14
2N3904
D6
1N4148
R13
10K
R11
10K
CR?
1N4148
R30
10K
R38
10K
R36
33K
4
D
HDR4
R?
1K
C?
47UF NP
Q4
2N3906
Q5
2N3904
R23
3.3K
F1
6A
4
1
3
2
BR1 BRIDGE
CP2
5600 63V
CP1
5600 63V
R22
470K
R20
470K
K1
RELAY-SPDT
+ OUT
GND
C6
27PF
To Bridge Switch

Rolls RA2200 - SCHEMA Specifications

General

Type	Power Amplifier
Channels	2
THD	<0.1%
Signal to Noise Ratio	>100dB
Frequency Response	20Hz - 20kHz
Input Impedance	20k Ohms

Summary

Signal Input and Pre-Amplification

Input Connectors and Filtering

RCA and phone jacks with associated input signal filtering.

Primary Amplifier Stage

LF353 op-amp configured for initial signal amplification and buffering.

Power Supply and Output Drive

Power Conversion and Regulation

Transformer, bridge rectifier, and voltage regulation circuits for power rails.

Output Driver Stage

MOSFETs and bipolar transistors forming the audio output power stage.