LEFT CHANNEL RAW SUPPLY

R1
POS 0.2/5W POS
To L Power Amp
C2 R3 C5
.015F/50V 2K/2W 6.8µ/100V
C1
.015F/50V
GND
To L Power Amp (NOTE 1)
From T1,
Rectifier 1 To SP Gnd
To L Speaker (-) Terminal
C3
.015F/50V
C3 R4 C6
NEG .015F/50V 2K/2W 6.8µ/100V
To L Power Amp
R2 NEG
0.2/5W

POS To Surge Relay Board

RIGHT CHANNEL RAW SUPPLY +38 To Protection
R11
POS 0.2/5W POS
To R Power Amp
C12 R13 C15
.015F/50V 2K/2W 6.8µ/100V
C11
.015F/50V
GND
To R Power Amp (NOTE 1)
From T1,
Rectifier 2 To SP Gnd
To R Speaker (-) Terminal
C13 GND To Protection
.015F/50V GND to Surge Relay Board
C13 R14 C16
NEG .015F/50V 2K/2W 6.8µ/100V
To R Power Amp
R12 NEG
0.2/5W
-38 To Protection
NOTES:
1. Near PA output connection at protection relay. NEG Spare WB9JPS Integrated Amplifier
2. Typical output: No-load ±39 V. 2.1 A per output ±35 V. Power Supply Board
GWJ 7-3-11 Page 1 of 2
 R18 C18 R19 C19
2.2 4.7µ/50V NP 2.2 4.7µ/50V NP

Contact Snubber Z1 Contact Snubber Z2

10 780 nH 4 780 nH
9 To Left 3 To Right
From Left Speaker From Right Speaker
K1C K1A
Power Amp 11 3.9/1W Power Amp 1 3.9/1W

K1 Pins (Top View)

14 11 8 5 1 7
13 6
12 2
K1D K1B
13 9 6 3
8 5
R20 14 10 7 4 R21
9.1/.5W 9.1/.5W
Load Dump Deutsch ET4103602BG-D Load Dump
36 VDC (15 V min.), 459Ω Coil,
D1 4PDT 10 A DC Contacts
1N5250 R33 R35
19V 68K 47K
-0.7 +3.1
-38 +38
Rapid R27 R31
R32 R26 15K 53 mA R32
Turn-Off 5.6K C22 220/2W
at -20V 220K 10µ/15V 2.4 mA 2.7K/.5W
100 µA 12 mA
turn on Turn-On D2 Protection
Delay 1N4002 K1 Relay
1 (2 sec) 8 9 Protection
R22 LED (F.P.)
56K Mute /Mute Bias
2 Overtemp Switches
PA-L DC
C20 on Main Heatsinks
R23 47µ/50V U1 (Normally Closed) D2
56K NP TA7317 6 +1.3 sat. Yel LED
SIP-9 Out R33
100K 3
2 Q1
R24 2N7000
56K 3 DC 1
PA-R R30 R34
C21 Gnd 56K 20K
R25 47µ/50V
56K 5 4 7 PA Input Performance
NP R28 -.78 ±4.7 VDC = Mute
12.1K R29 C23 +3.6/-2.6 = Resume
3 mA 56K .47µ/63V 1 Hz, 20 Vp-p = OK
< 0.7 Hz = Mute
PS GND WB9JPS Integrated Amplifier
-38 200 ms delay for 5 VDC step
1.0 s recovery delay Power Supply Board
GWJ 7-3-11 Page 2 of 2