Gemini Sound PDM-16 Service manual

SERVICE MANUAL

PDM-16

Stereo Preamp Mixer

CONTENT’S:

Connections & Operations:.......................................................Page 2-5

Specifications:..............................................................................Page 5

Parts Lists:.................................................................................Page 5-7

PCBs:........................................................................................Page 8-10

Schematics:.................................................................................Page 11

Gemini Sound Products Corp.

120 Clover Place P.O. Box 6928

Edison, NJ 08818-6928

732-738-9003 (Phone) • 732-738-9006 (Fax)

Page 1

29

28

31

32

33

34

35

30

22

23

15

21

24

20

16

20

27

26

25

25

25

25

25

25

19

13

11

8

9

1

2

3

14

18

20

12

20

10

6

4

5

17

7

Page 2

51

50

49

49

48

48

52

46

46

45

45

43

43

42

42

41

41

40

40

39

39

38

38

37

37

53

47

44

Page 3

36

Connections

1. Before plugging in the power cord, make sure that the VOLTAGE
SELECTOR (36) switch is set to the correct voltage.

NOTENOTE

NOTE: This product is double insulated and not intended

NOTENOTE
to be grounded.

2. Make sure that the POWER (29) switch is in the off position. The
POWER LED (30) will be off.

3. The PDM-16 is supplied with 3 sets of amp output jacks. The MAIN
OUTPUT (37) jacks are unbalanced and used to connect to your

main amplifier. The REC OUTPUT (39) jacks can be used to connect
the mixer to the record input of your recorder enabling you to record
your mix. The BOOTH OUTPUT (38) jacks allow you to hook up an
additional amplifier.

4. The MIC 1 (1) input (found on the front panel) accepts a 1/4" or XLR
connector. The MIC 2 (51) input (found on the rear panel) accepts
1/4" connectors. All accept balanced and unbalanced microphones.

5. On the rear panel are 3 stereo PHONO/LINE (43, 46, 49) inputs and
5 stereo LINE (40, 41, 42, 45, 48) inputs. The PHONO/LINE SWITCH

(44) enables you to set the (43) input to Phono or Line. The PHONO/
LINE SWITCH (47) enables you to set the (46) input to Phono or

Line. The PHONO/LINE SWITCH (50) enables you to set the (49)
input to Phono or Line. The phono inputs will accept only turntables
with a magnetic cartridge. A GROUND SCREW (52) for you to
ground your turntables is located on the rear panel. The stereo line
inputs will accept any line level input such as a CD player, a
cassette player, etc.

6. Headphones can be plugged into the front panel mounted
HEADPHONE (35) jack.

7. The PDM-16 comes with a front panel BNC LIGHT (28) jack. This
jack is for use with a gooseneck light like the Gemini GNL-700.

4. CHANNEL 3: Switch # (13) allows you to select the PHONO 3/LINE
5 (43) or the LINE 6 (42) input. The CHANNEL SLIDE (14) controls
the input level of this channel.

5. CHANNEL 4: Switch # (15) allows you to select the LINE 7 (41) or
the LINE 8 (40) input. The CHANNEL SLIDE (16) controls the input
level of this channel.

6. CROSSFADER SECTION: The CROSSFADER (18) allows the mixing
of one source into another. The PDM-16 features an assignable
crossfader. The ASSIGN (17, 19) switches allow you to select
which channel will play through each side of the crossfader. The
ASSIGN (17) switch has 5 settings (OFF, 1, 2, 3 or 4) and allows
you to select channel 1, 2, 3 or 4 to play through the left side of the
crossfader. The ASSIGN (19) switch has 5 settings (OFF, 1, 2, 3 or

4) and allows you to select channel 1, 2, 3 or 4 to play through the
right side of the crossfader. With the ASSIGN switch in the off
position, that side of the crossfader will be inactive. The
CROSSFADER (18) in your unit is removable and if the need arises
can be easily replaced. Crossfader units are available in three
varieties. Part # RF-45 (which is identical to the crossfader supplied
with the mixer) has a 45 mm travel from side to side. Part # RF-30 is
available with a 30 mm travel distance. Also available is the PSF-45
with a special curve designed for scratch mixing. Just purchase
one of these crossfader units from your Gemini dealer and follow
these instructions:

1. Unscrew the outside FADER PLATE SCREWS (B). Do not
touch the INSIDE SCREWS (C).

2. Carefully lift the fader and unplug the CABLE (D).

3. Plug the new fader into the cable and place it back in the
mixer.

4. Screw the fader to the mixer.

Using the Ground Lift Switch

Depending on your system configuration, sometimes applying the
ground will create a quieter signal path. Sometimes lifting the ground
can eliminate ground loops and hum to create a quieter signal path.

1. With the mixer on, listen to the system in idle mode (no signal
present) with the ground applied (the GROUND LIFT SWITCH (53)
in the left position).

2. Then turn the power off before moving the GROUND LIFT
SWITCH (53). Lift the ground by moving the GROUND LIFT SWITCH
to the right, turn the power back on and listen to determine which
position will provide a signal devoid of background noise and hum.
Keep the GROUND LIFT SWITCH in the ground position if the noise
level remains the same in either position.

CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWER
MIXER IN ANY WAY. TERMINATION OF THE AC GROUND CAN BE
HAZARDOUS.

Operation

1. POWER ON: Once you have made all the equipment connections to
your mixer, press the POWER SWITCH (29). The power will turn on
and the POWER LED (30) will glow RED.

2. CHANNEL 1: Switch # (9) allows you to select the PHONO 1/LINE 1
(49) or the LINE 2 (48) input. The CHANNEL SLIDE (10) controls the
input level of this channel.

3. CHANNEL 2: Switch # (11) allows you to select the PHONO 2/LINE 3
(46) or the LINE 4 (45) input. The CHANNEL SLIDE (12) controls the
input level of this channel.

7. EQUALIZER SECTION: This unit features dual 7 band GRAPHIC
EQUALIZERS (8, 22) to allow you to adjust the sound for any room.
To activate the equalizer, press the EQ BUTTON (31) (the EQ LED
will light). By adjusting any of the 7 left equalizer slide controls (8),
you can cut or boost the tonal characteristics of the sound coming
from the left speaker by ±12 dB. By adjusting any of the 7 right
equalizer slide controls (22), you can cut or boost the tonal
characteristics of the sound coming from the right speaker by ±12
dB. Deactivate the equalizer by pressing the EQ BUTTON (31) again
(the EQ LED will turn off).

8. OUTPUT CONTROL SECTION: The level of the MAIN OUTPUT (37) is
controlled by the MASTER (24) slide. Activating the MONO (23)
button (the mono LED will light) makes the overall output mono. The
BOOTH (32) control adjusts the level of the BOOTH OUTPUT (38).
HINT: The BOOTH OUTPUT is used by some DJs to run monitor
speakers in their DJ Booth. You can also use it as a second ZONE
or AMP output.

NOTENOTE

NOTE: The

NOTENOTE
The level is set by the channel slides of the selected
channel. The tonal qualities can be controlled by the
equalizers.

9. TALKOVER SECTION: The purpose of the talkover section is to allow
the program playing to be muted so that the mic can be heard above
the music. The MIC/TALKOVER SWITCH (7) controls MIC 1 and MIC
2 and has three settings. When the MIC/TALKOVER SWITCH (7) is

REC OUTPUT (39) REC OUTPUT (39)

REC OUTPUT (39) has no level control.

REC OUTPUT (39) REC OUTPUT (39)

Page 4

in the bottom position, MIC 1 and MIC 2 and talkover are off. When
the MIC/TALKOVER SWITCH (7) is in the center position MIC 1 and
MIC 2 are on, the MIC INDICATOR (6) will glow, but talkover is off.
When the MIC/TALKOVER SWITCH (7) is in the top position, MIC 1
and MIC 2 and talkover will be on and the volume of all sources
except the Mic inputs are lowered by 16 dB. The TREBLE (2) and
BASS (3) controls allow you to fully adjust the tone of MIC 1 and MIC

2. MIC 1 LEVEL (5) controls the level of MIC 1. The MIC 2 LEVEL
(4) controls the level of MIC 2.

10. CUE SECTION: By connecting a set of headphones to the
HEADPHONE (35) jack, you can monitor any or all of the channels.
Press the CUE ASSIGN (20) buttons for channels 1 - 4 to select the
channel or channels to be monitored and their respective LED
indicators will glow. Use the CUE LEVEL (34) control to adjust the
cue volume without effecting the overall mix. By moving the CUE
PGM PAN (33) control to the left you will be able to monitor the
assigned cue signal. Moving the control to the right will monitor the
PGM (program) output. Moving to the right will monitor the PGM
(program) output.

11. DISPLAY: The DISPLAY (21) indicates the MASTER output left and
right levels.

12.SOUND EFFECTS SECTION: Six different sound effects (UFO, TRON
BLAST, SIREN, GAS, MACHINE GUN and EMERGENCY) may be
added to your mix by depressing the SOUND EFFECTS CONTROL

BUTTONS (25). The volume of the effects can be adjusted using the
EFFECTS LEVEL CONTROL (27). The pitch of the effects can be
increased or decreased using the EFFECTS SPEED CONTROL (26).

Specifications

INPUTS:

DJ Mic....................................................1.5mV 2Kohm balanced

Phono.........................................................................3mV 47Kohm

Line.......................................................................150 mV 27Kohm

OUTPUTS:

Amp/Booth......................................................0 dB 1V 400ohm

Max..............................20V Peak to Peak

Rec...........................................................................225mV 5Kohm

MIC 1 & MIC 2:

DJ Mic....................................................1.5mV 2Kohm balanced

Bass......................................................................................± 12dB

High.......................................................................................± 12dB

GENERAL:

Frequency Response....................................20Hz - 20KHz +/- 2dB

Distortion................................................................................0.02%

S/N Ratio...............................................................better than 80dB

Talkover Attenuation..............................................................-16dB

Headphone Impedance.........................................................16ohm

Power Source.............................................115/230V 50/60Hz 10W

Dimensions................................................19”w x 4”h x 9”d

Weight........................................................................10.17 lbs

Parts Lists

Cabinet Parts and Packing

Item #

1

PANEL CONTROL

2

PANEL REAR

4

COVER BOTTOM

5

BRACKET VR

6

HOLDER X-FADER

7

PROTECTOR PLATE FOR 115/230V SWITCH

8

SOUND CONTROL KEY

9

SWING LEVEL

10

KNOB PUSH (SMALL)

11

BUSHING FOR KNOB (SMALL)

12

KNOB SLIDE (BIG)

13

KNOB SLIDE

14

KNOB ROTARY (ASSIGN)

15

KNOB ROTARY (B)

16

KNOB INLAY (BLACK)

17

KNOB INLAY (GRAY)

18

EQ VR INLAY

19

TRIM VR

20

INLAY PLATE

21

HOLDER LED 3f LED(17mm)

22

HOLDER LED

23

HOLDER LED

24

WASHER XLR

25

PCB SPACER SUPPORT

26

PAD FOOT

27

BNC DUST PROOF CLOTH

28

DUST PROOF CLOTH (KNOB-SWING)

29

DUST PROOF CLOTH (VR)

30

FADER DUST PROOF CLOTH

31

GND SCREW

32

PAN-HEAD MACHINE SCREW; PMS 2X4(B)

33

FLAT-HEAD MACHINE SCREW; FMS 2X4 (Y)

34

PAN-HEAD MACHINE SCREW; PMS 2.6X4(B)

35

BAND-HEAD MACHINE SCREW; BMS 3X2X4

36

BAND-HEAD TAPPING SCREW/TWIN SCREW;
BTS-2 3X8(AB) TWIN

37

FLAT-HEAD TAPPING SCREW; FTS-3 3X6(AB)

38

BAND-HEAD TAPPING SCREW; BTS-3 3X10(AB)

39

BAND-HEAD TAPPING SCREW; BTS-3 3X6(AB)

40

FLAT-HEAD TAPPING SCREW; FTS-3 3X12(AB)

41

FLAT-HEAD TAPPING SCREW; FTS-3 3X12(Y)

42

BAND-HEAD TAPPING SCREW; BTS-3 3X5(AB)

43

BAND-HEAD TAPPING SCREW/TW-E;
BTS-3/TW-E 3X6(AB)

44

NUT/WASHER 3mm

Item #

PRINTED CIRCUIT BOARD PDM-24S-1:

1

IN/OUT
PRINTED CIRCUIT BOARD PDM-24S-2:

2

MAIN
PRINTED CIRCUIT BOARD PDM-18-3:

3

EFFECT
PRINTED CIRCUIT BOARD PDM-24S-4:

4

FADER
PRINTED CIRCUIT BOARD PDM-18-5:

5

PHONES
PRINTED CIRCUIT BOARD PDM-18-6

6

Description

Printed Circuit Boards

Description Part #

Part #

002-210
034-001
032-018
021-763
022-322
022-305
049-199
023-674
002-531
002-532
002-704
002-715
003-102
003-110
148-236
148-239
003-994
003-970
003-373
003-969
003-986
003-975
003-564
047-474
049-206
159-201
156-216
159-171
159-196
146-710
102-007
101-008
102-025
107-015
110-172A

111-043A
111-044A
111-046A
111-049A
111-050
111-051A
111-053A

131-081

262-044

262-045

262-047

262-046

262-048

262-049

Page 5

Parts Lists - PCB1 Input/Output

Item #

Item #

Item #

Designators

1

IC1-4

2

IC6

3

IC7

Designators Description Part #

Q2-5

1

Q1

2

Designators Description Part #

D3-8, D507, D508

1

D1, D2

2

SW1-3

3

J1

4

J2-5

5

J6

6

ICs

Description Part #

INTEGRATED CIRCUIT NJM2068LD
INTEGRATED CIRCUIT NJM7812FA
INTEGRATED CIRCUIT NJM7912FA

Transistors

TRANSISTOR 2SC2878
TRANSISTOR 2SA1048 (2SA1317)

Electrical Parts

RECTIFIER DIODE 1N4002 (1N4003,1N4004)
SILICON DIODE 1N4148
SLIDE SWITCH 2P2C PH/LINE
PHONE JACK 6.3
4P RCA JACK P=14mm
6P RCA JACK P=14mm

074-145
074-107
074-114

076-095
076-104

079-027
079-003
081-027
092-078
161-105
161-106

Parts Lists - PCB2 Main

Item #

1

IC11

2

IC8-10

3

IC12

4

IC13-16

Item #

1

SW4-7

2

SW9-10

3

SW12-15

4

SW8

5

VR1-4

6

VR7-13

7

A1

8

VR14-15

9

VR5-6

10

Red 3.15

11

Green 2.5x6.5

12

Yellow 2.5x6.5

13

Red 2.5x6.5

ICs

Designators

INTEGRATED CIRCUIT
NJM4558LD(M5218AL,BA4558N)
INTEGRATED CIRCUIT NJM2068LD
INTEGRATED CIRCUIT M5229P
INTEGRATED CIRCUIT LB1403N

Description Part #

074-104

074-145
074-115
074-022

Electrical Parts

Designators Description Part #

LEVER SW 4P2C P=18 PH/LN,LN/LN
ROTARY SWITCH 1-2-5 L=17 FAD ASSIGN
PUSH SWITCH 2P2C L=12.5 CUE,MONO
SWITCH 4P2C L=12.5
SLIDE VR 45mm L=20 CH VOL MASTER 50KA×2
SLIDE VR 30mm L=15 EQ 20KW C.C
SLIDE VR 45mm L=20 FADER 100KB×2
ROTARY VR 16f L=20 TREBLE,BASS 10KB C.C
ROTARY VR 16f L=20 MIC LEVEL 10KA
LIGHT EMITTING DIODE (RED)
LIGHT EMITTING DIODE (GREEN)
LIGHT EMITTING DIODE (YELLOW)
LIGHT EMITTING DIODE (RED)

082-019
082-028
083-069
083-097
072-035
072-107
072-081
071-101
071-159
080-091
080-079
080-080
080-078

Page 6

Parts Lists - PCB3 Phono

Item #

Item #

Item #

Designators

1

IC18-20

2

IC26

3

IC25

4

IC17

5

IC21

6

IC22

Designators Description Part #

1

D37

2

D10, D36, D40

Designators Description Part #

J10

1

SW20

2

SW22

3

VR30

4

VR20-26

5

VR17

6

VR16

7

VR31

8

VR32

9

VR27

10

ICs

Description Part #

INTEGRATED CIRCUIT
NJM4558LD(M5218AL,BA4558N)
INTEGRATED CIRCUIT NJM4556L
INTEGRATED CIRCUIT NJM2068LD
INTEGRATED CIRCUIT M5229P
INTEGRATED CIRCUIT VM8080
INTEGRATED CIRCUIT GEMNI-01

Diodes

ZENER DIODE 3.6V 1/2W
LIGHT EMITTING DIODE (RED) 3.15f

Electrical Parts

PHONE JACK 6.3f
PUSH SWITCH 2P2C L=12.5 CUE,MONO
PUSH SWITCH 4P2C L=12.5 EQ
SLIDE VR 45mm L=20 CH VOL MASTER 50KA×2
SLIDE VR 30mm L=15 EQ 20KW C.C
ROTARY VR 16f L=20 CUE LEVEL 50KA×2
ROTARY VR 16f L=20 VOLUME 50KA
ROTARY VR 16f L=20 BOOTH 10KA×2
ROTARY VR 16f L=20 CUE PGM 20KW×2
ROTARY VR 16f L=20 SPEED 250KB×2CC

074-104

074-113
074-145
074-115
074-141
074-140

080-091

092-078
083-069
083-097
072-035
072-107
071-084
071-066
071-161
071-178
071-176

Page 7

Schematic

MIC-2

J1

X1

PH1/L1

SW1A

SW1B

J2A

PH1; L1

J2B

L2

PH-2/L3

SW2A

SW2B

J3A

PH-2; L3

L4

PH-3/L5

SW3A

SW3B

PH-3; L5

L6

L7

L8

OUT REC.

OUT BOOTH

OUT AMP.

RR

R204
4K7

R205
4K7

ECHO

8

VCC

GND

16

2345678910

OSC2TG1

SPEED

RL

-12

C183

+12

R227

R228

10

47

R258

10

6K8

IC19A

ML ML

4558

C175

C176

22/16

22/16

IC19B

MR MR

4558

R259
6K8

C184

47

-12

C185

+12

R229

R230

47

10

10

IC20A

BL

4558

C177

C178

22/16

22/16

IC20B

BR

4558

C18647

SW21B
SW02

SW21A
SW02
D35

LED

C217
104

14

Q

2

D

SW27

SW28

SW-PB

SW-PB

X44

X27

HT-82200

1

IC22

IND1

R239
47K

OSC1

VR27B
250KB

-12

R246

+12

12K

VR14

C97

+12

223
R135
22

C100

10/16

R140
1K3

C95

C115
47/16

224

C104

47/16

C105

47/16

-12+12

R15010R151

10

20

C116

C119
22/16

22/16

-VCC

+12

D11

LED

19263

C106

10/16

+12

D21

LED

19263

C109

10/16

4L

3L

2L

1L

4R

3R

2R

1R

4R

3R

2R

1R

4L
3L

2L

1L

C113

10/16

C112

10/16

C86
470/16

D6
1N4002D41N4002

C89
470/25

C90
470/25

C98

10KB

223

C99

R141

221

1K

IC8B

R109

2068LD

1K8

C96

224

R139

VR15

1K3

10KB
R159
20K

-12

R157

+12

100K

R138
10

R137
10

C140 101

IC9A

C144

22/16

2068LD

R114
10K

C117

C118

22/16

22/16

R115
10K

IC9B

C146

22/16

2068LD

C141

101
R158
100K

R160

20K

C103

10/16
R155
3K3
C136

471

19

17

15

18

GND

OUT

NF714IN713NF612IN6

+VCC

N INP16P INP

NF12IN11IN23NF24IN35NF36IN47NF48IN59NF5

C128

C125
471

C137
822

C129

C127

272

682

821

C126

C139

C138

124

563

183

VR7

VR8

VR13

20KW

20KW

20KW

R152
47

D12

D13

D14

D15

R174

47

LED

LED

LED

LED

4

IC13

LB1403N

785

R165
120K

R116

R161

10K

100K

R188
47
D22

D23

D24

D25

R172
47

LED

LED

LED

LED

4

IC15

LB1403N

785

R166
120K

R118

R162

10K

100K

+V INDGND

SW9A

X-FAD. ASSIGN

1

2

SW9B

3

1

2

3

SW10B

SW10A

X-FAD. ASSIGN

C147

C93

47

22/16

R163

47K

IC11A

4558

C150

IC11B

22/16

4558

+V IND GND

R164

+12 -12

47K

C94

47

X23

7812

IC6

+12

1

3

Vin

+12V

GND

C84
4,7/16

2

1

C85
4,7/16

GND

2

3

Vin

-12V

IC7

-12

7912

-12

VR9
20KW

R173
47

R171
47

X19

X24

C145

22/16

T.O

ON
OFF

R122
10K

19263

19263

R129
10K

SW8A

T.O.

SW8B

SW8C

SW8D

R106

+12

4K7

11

IC12

M5229P

10

C130
123

C132

0.47/16

VR10
20KW

D16

D17

LED

LED

785

C108
10/16

D26

D27

LED

LED

785

C111
10/16

A

X30

CROSS FADER

PLUG06

B

X11

12345

+12

R253

R254

R213

R256

4K7

10K

10K

7K5

R252

R255

R257

4K7

10K

7K5

R212

D10
LED

R201
4K7

SW22C
SW04

SW22B
SW04

SW22A
SW04

EQUALIZER

+12

-12

R210
36K
R207
36K
R208
10K

R209
10K

VR18

10KB

R133
1K

R214
10K

VR32A
20KW

R242
33K
R215
10K

VR32B
20KW

R24333K

10/16
C169

10K

+12

C154

10/16

R216
10K

C171
22/16

R222
10

R223

10

19

20

18

GND

-VCC

+VCC

NF12IN11IN23NF24IN35NF36IN47NF48IN59NF5

C195
124

C204

2.2/16

VR20
20KW

C153

R234
3K3

10/16

C218

R121

R184
100K

100K

104

R217
100K

C208
222

R107

+12

47

LEVELREPEAT

C155

10/16

VR19

C120

10KB

47/16

47/16

10/16

CUE LEVEL

R248

VR17A

18K

50KA

R249
18K
R251

VR17B

18K

50KA

R250

C168

18K

10/16

R233
3K3

C187

471
C172
22/16

17

OUT

C198
393

C199
1/16

VR21
20KW

C190
153

R130
100K

C210
47

IC18A

4558

C91

-12

R220
1K

C165

10/16

C166

10/16

R221
1K

X29

+12

-12

D34

LED

C131

C135

124

393
C134

C133

1/16

2.2/16

VR11

VR12

R156

20KW

20KW

3K3

D18

D19

D20

C124

LED

LED

LED

22/16

4

IC14

LB1403N

R167
160K

R117

R169

10K

8K2

C107

D28

D29

D30

C123
22/16

LED

LED

LED

4

IC16

LB1403N

R168

R119

R170

160K

10K

8K2

100KB

R87A

R87B 100KB

+12

-12

X22

C102
10/16

X31

X20

-12

-12

+12

+12

4.7/16

ML

MR

C110

4.7/16

X28

X21

1

1

2

X8

4

3

2

1

CUE\PGM

2

BL

BR

C170
10/16

RL

RR

ML

MR

RL RR

X32

X30

+12

-12

-12

-12

R9

+12

30K 1%

R7

C11

47

R5

C10

R10
1K 1%

10/16
C9

R8
1K 1%

10/16

C3

10/16

C4

R3
1K 1%

10/16

C18

180

R23

47/16

R21
1K

C22
101

C15

101
R16
1K

C13
47/16

R11
180

R26
1K8

R25
1K8

C35

180

R39

47/16

R37
1K

C42

101

C33

101
R32
1L

C31
47/16

R27
180

J3B

R42
1K8

R41
1K8

C54

180

R55

47/16

R54
1K

J4A

C58

101

C51

101
R48
1K

C49
47/16

R43
180

J4B

R58
1K8

R57
1K8

J5A

R60
1K8

R59
1K8

J5B

R62
1K8

R61
1K8

R67
47K

C77

J6A

R68
8K2

10/16

C76

R63
8K2

10/16

R65

47K

R74

47K

C80

J6B

R76
180

22/16

C79

R70
180

22/16

R72

47K

R82

47K

C82

J6C

R84
180

22/16

C81

R78
180

22/16

R81

47K

47

101

X2

IC1A

2068LD

R6

C7

30K 1%

101

R2

C1

30K 1%

R1

101

1K 1%

2068LD

C5

R4

101

IC1B

30K 1%

R22

R20

100K

8K2

C24

C26

822

273

IC2A

2

1

C23

3

2068LD

10/16

R18

4 8

C21

47K

47/16

R13
47K

IC2B

10/16

2068LD

C17

C16

C20

273

822

R17

R15

8K2

100K

C28
101

C29
101

R38

R36

100K

8K2

C41

C44

822

273

IC3A

2068LD

C4010/16

R34

C39

47K

47/16

R29
47K

IC3B

10/16

2068LD

C36

C34

C38

273

822

R33

R31

8K2

100K

C46
101

C47
101

R53

R52

100K

8K2

C60

C62

822

273

IC4A

2068LD

C5910/16

R50

C57

47K

47/16

R45
47K

IC4B

10/16

2068LD

C52

C53

C56

273

822

R49

R47

8K2

100K

C64
101

C65
101

C69
101

C68
101

C72
101

C73
101

2SC2878

Q3

R75
5K1

R73
330

330

R71
Q2 2SC2878

R69

2SC2878

Q5

R83
5K1

R80
330

R79
330

Q4 2SC2878

R77

5K1

C75

220/16

X14

C12

1

22/16

2

C6

C8

47/16

47/16

C2

22/16

-12
+12

R19
47

R14
1K8

C30

10/16

C27

10/16

-12
+12

R35
47

R30
1K8

C48

10/16

C45

10/16

-12
+12

R51
47

R46
1K8

C66

10/16

C63

10/16

C70

10/16

C67

10/16

C74

10/16

C71

10/16

-12

R85
2M2

5K1

D2

1N4148

3

R12
47

R24
1K8

C14

C25

47/16

10/16

X3

X16

C19

10/16

R28
47

R40
1K8

C32
47/16

C37

10/16

R44
47

R56
1K8

C50
47/16

C55

10/16

Q1
2SA1317

R66
560K

SW5A
2

SW5C
8

SW5D

11

SW5B
5

C43
10/16

X4

X15

SW4A
2

SW4C
8

SW4D

11

SW4B
5

C61
10/16

X5

X17

SW6A
2

SW6C
8

SW6D

11

SW6B
5

X6

X18

SW7A

2

SW7C

8

SW7D

11

SW7B

5

X7

C78
4,7/16

R64
1K

D1
1N4148

J7

SW18

F

PLUG

+12

AC 220/110 V

J8

PLUG

R89
47K
R92
47K

3

QUE

1

9
7

12
10

6
4

3
1

9
7

12
10

6
4

3
1

9
7

12
10

6
4

3
1

9
7

12
10

6
4

SW13A

R91
47K
R90
47K

R103
4K7

+12

R85
47K
R88
47K

QUE

SW12A

R87
47K
R86
47K

R101
4K7

+12

R93
47K
R96
47K

QUE

SW14A

R95
47K
R94
47K

R104

+12

4K7

R97
47K
R100
47K

QUE

SW15A

R99
47K
R98
47K

R105
4K7

+12

C148

100/16

C149

100/16

1

J9

2

LAMP

SW19

T1

SW-SPST

059-166

C141

103

SW

TR05

R134

R136

27K

MIC-2

VR6

R111
10K

10KA

VR5

R110
10K

10KA

MIC-1

R123

VR2A

10K

50KA

SW13B

CH-1

R124

VR2B

10K

D31
LED

50KA

R112

VR1A

10K

50KA

SW12B

CH-2

R113

VR1B

10K

D9
LED

50KA

R125

VR3A

10K

50KA

SW14B

CH-3

R126

VR3B

10K

D32
LED

50KA

R127

VR4A

10K

50KA

SW15B

CH-4

R128

VR4B

10K

D33
LED

50KA

R175
47K

C142 47

IC10A

2068LD

C121
22/16

IC10B

2068LD

C143 47

C152

R176
47K

22/16

X12

X28

X?

X27

22

C92 47

C101 47/16

IC8A

2068LD

C114
47/16

R149

1L

47K

R148

1R

47K

R147

2L

47K

R146

2R

47K

R145

3L

47K

R144

3R

47K

R143

4L

47K

R142

4R

47K

-12
+12

R154
10

R153
10

C151

R177
27K

22/16

C122
22/16

R178
27K

1

D8
1N4002D71N4002

2

D507

D508

1N4002

1N4002

D3
1N4002D51N4002

C87

103

C88

103

C158

C159

100/16

N INP16P INP

C194
123

C205
0,47/16

R102
47

R182
100K

R183
100K

100/16

15

VR22
20KW

C221 39

R260
68K

C222

NF714IN713NF612IN6

C193
682

C203
124

IC18B

4558

R181
100K

C211
331

R261
68K

IC26A

4556

IC26B

4556

39

R225

101

10

R226

C219

10

IC25A

C157

R193
1K

10/16

2068LD

C173

C174

22/16

22/16

IC25B

C160

R194
1K

10/16

2068LD

C220 101

12K

R247

+12

R199
4K7

D40
LED

11

IC17
M5229P

10

C192

C191

C188

272

821

471

C196

C197

C179

563

183

822

VR23

VR24

VR25

VR26

20KW

20KW

20KW

20KW

C202

R211

18K

1/16

C189
332

R180
100K

C209
472

-12
+12C167

R231
10

R232
10

C180
470/16

R240
180K

R179
100K

1

C182

2

681

3
4
5

8K2

R235

C216 123

6
7
8

VR29

9

R132

10

R244

11

100K

R131

180K

12

100K

500KB

DELAY

D37

C207

C206

3.6V

4.7/16
153

+5

IC21
VM8080

1

NC3

VSS

2

VDD

NC2

3

NC1

LH

OUT

OSC2

5

OSC1

OUT

6

KEY8

KEY1

7

KEY7

KEY2

8

KEY6

KEY3

KEY5

KEY4

R236

47K

C201
1/16

R237
10K

R192
3K3

LEVEL

C200

VR16
50KA

1/16

C212

R197

682

1K

R108
47

C213

C181

X26

X34

222

470/16

C214

222
R120
47

-12

IC23

BIAS
IN
PREO
OUT
SEL
OSC1
OSC2
OSC3
OSC4
VSS
A6
A7

HT8955

R238
300K

VR27A
250KB

1

2

3

R203
4K7

D36
LED

BOOTH

C215
100/16

CASB
DATA
RASB

1K

18
17
16
154
14
13
12
11
109

3
2
1

SW20A
SW02

SW20B
SW02

MONO

VDD
A8
WRB
A0

A1
A2
A3
A4
A5

+12

+12

R1901KR191

J10

PHONEJACK2

R245
330/0.5

24
23
22
21
20
19
18
17
16
15
14
13

MASTER

VR30A

50KA

VR30B

50KA

VR31A

10KA

VR31B

10KA

-12

D38
5V

SW23
SW-PB

TG6

11

R218
1K3

C161

10/16

C162

10/16

R219
1K3

R195
1K

C163

10/16

R187
47K

R189
47K

C164

10/16

R196
1K

R202
4K7

C156
10/16

IC24

5

A0

7

A1

6

A2

12

A3

11

A4

10

A5

13

A6

9

A7

1

A8

4

RAS

15

CAS

3

WE
41256

SW24

SW25

SW-PB

SW-PB

TG3

TG4

TG5

VSS VDD

IND2

TG7

TG8

121314151617181920

R185
100K

R186
100K

R224
10

SW26
SW-PB

TG2

AUD