Peavey Electronics Escort 2000 Service manual

SERVICE MANUAL

150 WATT POWERED MIXER

CONTENTS

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Trouble Shooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

PCB Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-10

Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-14

Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-22

Exploded View • Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23-26

Peavey Electronics Corporation • 711 A Street • Meridian • MS • 39301

[phone] • FAX [phone] • www.peavey.com

SPECIFICATIONS

- 2 -

Test condition:
A/C Input Voltage @ 115V or 230V
All Bass, Treble, and FLS are set to center unless specified.
All Reverb are set to minimum counter-clockwise.
Master volume L & R set to maximum
Channel 5 is set to stereo mode.

Typical LIMIT UNIT

Output Power 75 70 W
(1kHz, 1% ) Ch. 5 In
Distortion @ 70W 0.5 0.8 %

Ch. 5 In w/LPF 30K Filter
DDT LINE Input = 750 mV 70 80 W

RCA Distortion 1 <2.5 %
Input Input = 1400mV 70 85 W

Distortion 2 <3.5 %

S/N @ 75W 1KHz 85 68 dB
( A-WTD) Microphone Input open

FLS Freq Range +/-10% +8/-13 +/-2 dB

RCA 100 Hz
Input 350 Hz
@ 1V 1 KHz
Output 3 KHz

8 KHz
Gain +/-3 dB
MIC Channel 1 (bal) 82
Input Channel 2 (bal) 82
1mV Channel 3 (bal) 82

Channel 4 (bal) 82
10mV Channel 5 (RCA In) 38

Tone Control +/-10 +/-2.5 dB

Bass (100Hz) CCW/CW
LINE Channel 1
Input Channel 2
10mV Channel 3

Channel 4 ( L.ch In )
(10mV) Channel 5 ( RCA In ) +6/-10 +/-2.5 dB

Treble Control +/-10 +/-2.5 dB
Treble (10KHz) CCW/CW

LINE Channel 1

SPECIFICATIONS

- 3 -

Input Channel 2
10mV Channel 3

Channel 4 ( L.ch In )

(10mV) Channel 5 +6/-10 +/-2.5 dB

Hum and Noise w/ BPF
17-17KHz Filter
All VL gains at maximum 10 15 mV

Input Impedance

Mic Input 2K 1K5 Ω
Line 1 & 2 & 3 & 4R.ch Input 30K 20K Ω
Line 4L.ch Input 18K 12K Ω
RCA Input 10K 8K Ω

Frequency Response 30-25K 70-20K Hz
RCA In @ 1W output, -3dB

Input Sensitivity @ 50W ( mono Input )
Line Input Channel 1 45 +/-10 mV

Channel 2
Channel 3
Channel 4 (L In)

L/R Separation @ 1KHz ,1w O/P 50 36 dB

w/ LPF 30k Filter

L/R Channel Difference @ 1w O/P 1 2 dB

Aux Output Gain @ 1KHz 15 +/-2 dB
100mV Aux In, L/R Master @ Max

Channel 5 @ Max

Reverb Input 2mV ,VR Set to Max
Freq Rance @1KHz, 1V O/P

LINE 1 260 Hz +/-3Hz +6 +/-2 dB

LINE 2 260 Hz +/-3Hz +6 +/-2 dB

LINE 3 260 Hz +/-3Hz +6 +/-2 dB

LINE 4 260 Hz +/-3Hz +6 +/-2 dB

RCA In 260 Hz +/-3Hz +6 +/-2 dB

SPECIFICATIONS

- 4 -

FLS LED Sensitivity @ RCA Input

Low @ 100Hz +/-10% 15 20 W
Low Mid @ 350Hz +/-10% 15 20 W
Mid @ 1KHz +/-10% 15 20 W
High Mid @ 3KHz +/-10% 15 20 W
High @ 8KHz +/-10% 15 20 W

Power Consumption
Maximum Power (O/P 75Wx2)

115Vac 3.5 4.0 A
230Vac 1.75 2.8 A

BLOCK DIAGRAM

- 5 -

POWER AMP

MIXER

OUT

L SPEAKER

PA

DDT

EQ

100Hz 350Hz 1KHz 3KHz 8KHz

GAIN

MAIN LEFT

LEFT

AUX OUT

FLS

RED LED

RIGHT

HIGHMID

HIGH

LOW LOW

MID

MID

OUT

R SPEAKER

DDT

EQ

PA

100Hz 350Hz 1KHz 3KHz 8KHz

GAIN

MAIN RIGHT

+15V

REGULATOR

-15V

POWER

FAN CONTROL

LED

GREEN

FAN2

FAN CONTROL BOARD

FAN1

-34V GNDGND +34V

POWER SWITCH

Module

Switch Mode

Power Supply

GND

110 / 220 V

MAIN POWER INPUT

SMPS

OP-AMP

IN

LEFT

RIGHT

L BUS R BUS REV BUS

LINE

MIC

BASS TREBLE

GAINOP-AMP

PHONEJACK

CHANNEL 1

REVERB

LINE

MIC

BASS TREBLE

GAINOP-AMP

PHONEJACK

CHANNEL 2

REVERB

LINE

MIC

BASS TREBLE

GAINOP-AMP

PHONEJACK

CHANNEL 3

REVERB

STEREO

LEFT

MIC

BASS TREBLE

GAINOP-AMP

PHONEJACK

CHANNEL 4

BASS TREBLE

GAIN

RIGHT

PHONEJACK

REVERB

MODE

1

MONO / STEREO

LEFT

BASS TREBLE

GAINOP-AMP

3

A

2

AUX IN

CHANNEL 5

REVERB MODULE

REVERB

+15V

GND

BASS TREBLEOP-AMP

REVERB

GAIN

6

B

4

5

RIGHT

TROUBLE SHOOTING GUIDE

- 6 -

Symptom Cause Remedy

No power Fuse F501 damage Replace

No Power Output U403 ,U406 damage Replace

No Power Indicator U407 damage Replace

FLS No Function U407,U408 damage Replace

Treble No Function U407,U408 damage Replace

Bass No Function U407,U408 damage Replace

CH.1 to CH.4 No Output U407,U408 damage Replace

Reverb No Function VR01 damage Replace

THEORY OF OPERATION

Switch Mode Power Supply Unit ( SMPSU)
This unit is not recommended to be serviced in the field except by replacing the complete module as
a total assembly.The following information is provided to assist in the trouble shooting of the unit.
Please note that the mains fuse must be replaced with exactly the same grade of fuse for safety reg­ulations and to avoid risk of damage and potential fire hazard.

The mains input to the SMPSU allows for operation from 90-130V in 115V setting and 190-250V in
the 230V setting. The output of the SMPSU is +/-33V DC for the main power supply rails of the
power amplifier. The unit also has connectors for main power input,mains power switch and chas­sis,earth and signal grounds.

The SMPSU incorporates protection circuits other than the fuses including over current protection.All
parts contained in the SMPSU should be considered to be safety parts and should be replace only
with exact parts where service can be provided by properly licensed and trained repair technicians.

PCB LAYOUT

- 7 -

DSP REVERB PCB

(Top View)

(Bottom View)

PCB LAYOUT

- 8 -

Power Amp PCB