Download SERVICE MANUAL

Index & Warnings
Block Diagram, Rear Board, Vu-Meter Board
Main Board
Spare Parts List
2
3
4
GENERALMUSIC S.p.A. Sales Division: 47842 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12 - tel. 0541/959511 - fax 0541/957404 - www.generalmusic.com
SERVICE MANUAL
Notice
Service must be carried out by qualified personnel only. Any tampering carried out by unqualified personnel during the guarantee
period will forfeit the right to guarantee.
For a correct operation of the instrument, after having switched off, be careful to wait at least 3 seconds before switching on again.
To improve the device's specifications, the schematic diagrams may be subject to change without prior notice.
Schematic Diagrams
Schematic Notes
All components marked by this symbol have special safety characteristics, when replacing any of these components use only
Manufacturer's specified parts.
The (µ) micro symbol of capacitance value is substituted by U. The (Ω) omega symbol of resistance value is substituted by E.
The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified. All resistors are 1/8W unless otherwise specified.
All switches shown in the "OFF" position. All DC voltages measured to ground with a voltmeter 20KOhm/V.
CODE : 270201
Soldering point.
Supply voltage.
Male connector.
Logic supply ground.
Female connector.
Analog supply ground.
M/F faston connector.
Signal ground.
Test point.
Chassis ground.
ATTENTION
Observe precautions when handling
electrostatic sensitive devices
Flag joined with one or more flags with the same signal name inscribed.
❏ 1
768171 - MAIN BOARD
768172
REAR BOARD
768173
MIX1
L/R
OUTPUT
TONE STAGE
BALANCED
MIC
INPUT
MIC
LEVEL
TALK
OVER
GAIN
REDUCTION
CIRCUIT
+
-
JACK BOARD
MIX2
L/R
OUTPUT
LOW
HIGH
MIX2
CN7
CN4
GAIN
TAPE
L/R
OUTPUT
MIX1
GAIN
LOW MID HIGH
LOW MID HIGH
FADER
RIAA
EQ
PREAMP
PHONO 1
L/R
INPUTS
CN1
CN5
PHONO
PFL
LINE
EQ STAGE
LINE 1
L/R
INPUTS
KILL STAGE
FADER
GAIN
LOW MID HIGH
LOW MID HIGH
RIAA
EQ
PREAMP
PHONO 2
L/R
INPUTS
CN2
CN6
PHONO
PFL
LINE
CN9
KILL STAGE
P1,2,3
EQ STAGE
LINE 2
L/R
INPUTS
CN3
768156 VU-METER BOARD
768173
L VU-METER
MIX1
CN1
+/-15V
SUPPLY
REGULATOR
CN2
AC
SOCKET
CN8
951086 - AC/AC ADAPTER
230Vac (Europe Version)
951100 - AC/AC ADAPTER
115Vac (US Version)
R VU-METER
PHONES
PFL
JACK BOARD
DRW G.BOCCATO
DWG# 550592
PCB#
GENERALMUSIC S.p.A. ITALY
CKD
DSK# 55 PART: 1/1
SCHEMATIC DIAGRAM
ALL RIGHTS ARE RESERVED, NO COPIES
WIRING & BLOCK DIAGRAM
OR REPRODUCE THIS DOCUMENT WITHOUT
WRITTEN CONSENT BY GENERALMUSIC.
APP.
❏ 2
REV: 11-03-98
❏ 3
SPARE PART LIST
ACCESSORIES
Code
Ref.
Description
951086
AC/AC Adapter 230Vac (Europe Version)
951100
AC/AC Adapter 115Vac (US Version)
MAIN BOARD
Code
Ref.
Description
768171
CMO121
MASTER BOARD (CSP071)
POT008
POT009
RV142-40 100KB GM POT.
RV142-40 100KB GM CENTER CLICK POT.
*
*
*
POT028
RA60-20 10KA GM POT.
ICS011
ICS012
TL072 DUAL OP. AMPL.
TL074 QUAD. OP. AMPL.
*
*
ICS023
DEV007
TDA2822M DUAL POWER AMPL.
2V 2P SMK PUSH SWITCH
*
DEV014
4V 2P SMK PUSH SWITCH
*
*
TRN028
TRN011
JFET BF254
PNP TO92 BC560C
*
CON053
6 Contacts Male Connector
080705
*
*
CON131
LED014
10 Contacts Male Connector
RED LED (3mm)
080293
*
*
CON034
DIO065
Streo Jack
15V 1/2W Zener
100061 *
100084 *
090194
347355 *
Gray/Red Switch Cap
347357 *
347354 *
Gray/Yellow Switch Cap
Gray/Yellow Slider Knob
347365 *
Gray/Blu Knob
347363 *
347366 *
Gray/Red Knob
Gray/White Knob
REAR BOARD
Code
768172
Ref.
CMO122
Description
REAR BOARD (CSP072)
*
*
ICS001
ICS002
LM7815 1.5A VOLTAGE REGULATOR
LM7915 1.5A VOLTAGE REGULATOR
100061 *
ICS011
TL072 DUAL OP. AMPL.
*
*
CON017
CON053
VERTICAL RCAx4
MICS6 Connector LUMBERG
*
CON131
10 Contacts Male Connector
*
110113 *
CON135
FUS001
3 Contacts Male Connector
5x20 FUSE CLIP
*
*
CON 151
DIO099
5 Contacts DIN Socket
1N4148 SIGNAL DIODE
*
DIO010
W02M 1.5A BRIDGE DIODE
080168
VU-METER BOARD
Code
768156
Ref.
CMO106
Description
VU-METER BOARD (CSP070)
080706
*
*
LED016
TRIMMER 22K OR P10
GREEN LED
080710
*
LED015
YELLOW LED
080705 *
100927 *
LED014
ICS024
RED LED
LB1412
*
DEV007
2V 2P SMK Switch [1/2]
*
*
CON135
CON053
MX254W03 Vertical Connector
MICS6 Connector LUMBERG
CROSSFADER BOARD
Code
768158
Ref.
CMO108
Description
CROSSFADER BOARD
*
CON053
MICS6 Connector LUMBERG
*
347354 *
POT029
60mm 2x100kW Slider Pot.
Gray/YellowSlider Knob
Note:
Each spare part is single quantity unless otherwise specified.
Asterisk prefix explanation:
Omitted
= First level spare part.
One asterisk
Two asterisk
= Second level, part of previous listed first level part.
= Third level, part of previous listed second level part.
Three asterisk = ............
Any request for not above mentioned part must encompass specific description including:
1) Model name,
2) Section name,
3) Module code,
4) Reference name,
5) Quantity number.
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