Reloop RMX-20 Service manual

SERVICE MANUAL

MODEL NO.: RMX-20

Contents

Specification 1

Block Diagram 2

Point To Point Diagram 3
Exploded View 4
Exploded View Part List 5

Electrical Part List 6-14
IC Block Diagram 15-17
Package View & Part List 18

Schematic Diagram 19-22

GENERAL SPECIFICATION

1. Power consumption 25 Watts w/full headphone output.

2. Dimensions 254 (W) x 315 (D) x 87 (H) mm

3. Headphone impedance 32 Ohms

4. Weight 3.2Kgs

5. Input/output sensitivity (Level/Impedance)
Line 10K OHM / -14dB (200mV) +2/-3dB
Phono 47K OHM / -50dB (3mV) +/-3dB
Microphone 3K OHM / -54dB (2mV) +/-3dB
Master output 1K OHM / 0dB (1V) +/-3dB
Rec output 1K OHM / -8dB (398mV) +/-3dB
Phones 33 OHM / -3dB (0.7V) +/-3dB (Load=32 OHM)
Master XLR output +6dB (2V) / [0dB (1V) single to GND] / 600 OHM +/-3dB
Note : 0dB=1Vrms, Load 47K Ohms.

6. Maximum output (Load=47K Ohms, T.H.D.=5%)
Master output More than 18dB (8V)
Rec output More than 8dB (2.5V)
Phones (Load=33 OHMS) More than 5dB (1.7V)

7. Channel balance Within 3dB

8. Frequency response
Line 20Hz - 20KHz +2dB/-3dB
Phono 20Hz - 20KHz +2dB/-3dB
Microphone 20Hz - 20KHz +2dB/-3dB

9. Output noise (IEC-A,Weighted)
Line Less than -77dB
Phono Less than -65dB
Microphone Less than -60dB

10. T.H.D (1KHz 0dB Output)
Master output Less than 0.05% (20~20KHz BPF, Load=47K OHMS)
Phones Less than 0.3% (20~20KHz BPF, Load=33 OHMS)

11. Crosstalk More than 60dB at 1KHz between L and R channels (20~20KHz BPF)

12. Mic/Channel equalizer
Bass +10 ± 3dB / Less than -35dB at 70Hz
Mid +10 ± 3dB / Less than -35dB at 1KHz
Treble +10 ± 3dB / Less than -35dB at 13KHz

13. Frequency kill
Low cut Less than -35dB at 70Hz
Mid cut Less than -35dB at 1KHz
Hi cut Less than -35dB at 13KHz

BLOCK DIAGRAM

1 2 3 4 5 6 7 8 9 10 11 12

A

LINE 2

PHONO 2

PHONO/AUXAUX/PHONO

B

LINE 1

C

PHONO 1

PHONO/AUXAUX/PHONO

MICROPHONE

BUFFER

R.LINE

R.PHONO

BUFFER

L.LINE

AMP

L.PHONO

AMP

BUFFER

R.LINE

R.PHONO

BUFFER

L.LINE

AMP

L.PHONO

AMP

AMP

LINE / PHONO

LINE / PHONO

MIC

CH2/R

CH2 GAIN

AMP

CH2/L

AMP

CH1/R

CH1 GAIN

AMP

CH1/L

AMP

AMP

MIC

MID PASS

FILTER

LOW PASS

MID PASS

HI PASS

FILTER

FILTER

LOW PASS

FILTER

LOW-CUT

MID-CUT

HI-CUT

MID PASS

HI PASS

FILTER

FILTER

LOW PASS

FILTER

LOW-CUT

MID-CUT

HI-CUT

FILTER

LOW-CUT

FILTER

FILTER

MID PASS

LOW PASS

HI PASS

MID-CUT

FILTER

HI-CUT

LOW-CUT

FILTER

FILTER

MID PASS

LOW PASS

HI PASS

MID-CUT

HI-CUT

FILTER

EQ CONTROL

BUFFER

CH2/R

BUFFER

CH2/L

CH2/R

CURVE

FADER

CURVE

FADER

REVERSE SW

REVERSE

DC

ATTENUATOR

DC CONTROL

CH2/L

CROSS FADER

+15V

+15V

REVERSE SW

REVERSE

CIRCUIT

B+

CHANNEL

FADER

B+

CIRCUIT

CHANNEL

FADER

CROSS CURVE

AMP

EQ CONTROL

BUFFER

CH1/R

CH1/R

CHANNEL

FADER

CURVE

FADER

CURVE

FADER

CHANNEL

FADER

BUFFER

CH1/L

REVERSE SW

REVERSE

DC

ATTENUATOR

DC CONTROL

CH1/L

B+

CIRCUIT

CROSS CURVE

AMP

BUFFER

MIC

L.CH

R.CH

CH2/R

CH2/R

AMP

CH2/L

CH2/L

AMP

CH1/R

CH1/R

AMP

CH1/L

CH1/L

AMP

AMP

AMP

MUTE

POWER SUPPLY

+12V +15V -15V

RECTIFIER &

CH1/CH2

CUE LEVEL

HEADPHONE

DRIVE

HEADPHONE

DRIVE

MASTER LEVEL

CUE LED

AC POWER

DISPLAY

AMP

L.CH

AMP

R.CH

INVERTER

INVERTER

L.CH

R.CH

HEADPHONES

MUTE

MASTER OUT

BALANCE OUT

BALANCE OUT

R.CH

REC OUT

L.CH

A

B

C

D

HI PASS

FILTER

EQ CONTROL

MASTER L.CH

LED DISPLAY

MASTER R.CH

LED DISPLAY

1110987654321

12

D

POINT TO POINT DIAGRAM

EXPLODED VIEW

EXPLODED VIEW PART LIST

REF. NO. DESCRIPTION PART NO. Q’TY REMARK

1 FRONT PANEL 300-RMX20-1140 1
2 FRONT BOARD ASS'Y 703-RMX20-870 1
3 MIXER PCB ASS'Y 704-RMX20-5182 1
4 EQ PCB ASS’Y 704-RMX20-5184 1
5 BOTTOM BASE 300-RMX20-1142 1
6 BACK BOARD 300-RMX20-1137 1
7 OUTPUT PCB ASS’Y 704-RMX20-5180 1
8 ROTATE KNOB(SEMICIRCLE) 100-SCX2-2211 15

9 PUSH KNOB(LARGE) 100-SCX2-2212 3
10 VR SHEATH 300-SCX2-1125 3
11 LED DECORATION 501-RMX20-1752 1
12 POWER KNOB 100-RMX50-1641 1
13 KNOB PROTECTOR 100-RMX50-1642 1
14 SCREW(CTF,3*7) 602-AKS4-496B 12
15 SCREW(BTB,3*5,ZB) 602-QMX2BPM-322 22
16 VR FIXED PLATE 300-SCX2-1133 3
17 CH VR PCB ASS’Y 704-RMX20-5186 2
18 FADER PCB ASS’Y 704-RMX30-5129 1
19 SW PCB ASS’Y 704-RMX20-5185 1
20 PUSH KNOB 100-Q3433-2208 3
21 THROW GRANULE 100-Q2411-2206 3
22 EFFECT FIXED PLATE(LARGE) 300-RMX30-1138 1
23 EFFECT FIXED PLATE(SMALL) 300-RMX30-1139 1
24 IF CURVE VR(10K) PCB ASS'Y 704-RMX30-5131 2
25 CF CURVE VR PCB ASS'Y 704-RMX30-5132 1
26 B/O PCB ASS'Y 704-RMX20-5181 1
27 MIC PCB ASS’Y 704-RMX20-5183 1
28 PHONE PCB ASS’Y 704-RMX30-5134 1
29 SCREW(M3*P0.5*5L) 602-MP3-324 4
30 SCREW(2.6*4 P=0.45) 602-MK7-134 12

31
32 FIXED PILLAR(SHORT) 200-SCX2-437 7
33 RCA ADAPTOR PLUG(A028) 420-Q3433-106 4
34 SPACER SUPPORT(KCA-19) 504-Q2221-078 4
35 IC(NJM7815FA 3PIN) 417-DV330-216 1
36 IC(NJM7915FA) 417-RCC955A-291 1
37 SCREW (BTB 3*6ES ,BLACK) 602-CDC2050-345 2

38
39 CUSHION(26*10mm,t=0.5mm) 612-HPT1-163 2
40 HIMILON 612-HDJ100-045 3
41 FIXED PILLAR FOR OUTPUT 200-RMX30-438 2
42 SCREW(3*5 P=0.5) 602-B300-041 24
43 RUBBER FOR FOOT(PVC,70%) 604-BEAT4-238 4
44 SCREW(STB,4*8,ZB) 602-BEAT4-440 4
45 GROUND PIN 200-DJ100-231 2

46
47 SCREW(3*10 ZK PTP) 602-MK7-131 3

48
49 RATING LABEL 501-RMX20A-1249 1
50 SERIES NO. LABEL 501-DV300-1067 1
51 SEPARATELY SLICE(LARGE) 501-RMX30-1773 1
52 SEPARATELY SLICE(SMALL) 501-RMX30-1775 1

SLEEVE(∮6*10.2L)

CUSHION(∮28*4.8*0.5t)

WASHER(∮8*3.2*1t,NI)

TRANSFORMER(AC230V,50Hz,EI­48,EN61558/CE(EMC.LVD))

200-HPR1-331 3

612-Q2422-102 2

606-Q2221-122 2

411-T1-300 1

FRONT BOARD & MIXER PCB ASS’Y PART LIST

REF. NO. DESCRIPTION PART NO. Q’TY

FRONT BOARD & MIXER PCB ASS'Y 704-RMX20-5187 1

SLEEVE( 6*10.2L)∮ 200-HPR1-331 3
SPACER SUPPORT(H-20) 504-RMX30-157 6
SCREW(3*5 P=0.5) 602-B300-041 13
SCREW(2.6*4 P=0.45) 602-MK7-134 12
SCREW(BTB,3*5,ZB) 602-QMX2BPM-322 8
PLASTIC SCREW(S-306-N66) 602-SPANDMK2-536 12
FRONT BOARD ASS'Y 703-RMX20-870 1
SHAFT 200-SCX2-435 6
FRONT BOARD 300-RMX20-1141 1
MIXER PCB ASS'Y 704-RMX20-5182 1
SW9-11 PUSH SW(SPEA12MC05-HF) 403-AK4-196 3
SW1,SW2 LEVER SW(LBC22B-20KB,6PIN) 403-CDMIX1-114B 2
SW3-8 LEVER SW(LBCR23M-20K) 403-T2-183 6
W8,W6 3P2.5 CONNECTOR WIRE(L=80mm,AWM2877 AWG26) 404-HPM11-1593 2

3P2.5 CONNECTOR WIRE(L=100mm,AWM2877

W28*2

W1,W2

W30

W3

W4

W12

W9

W11

W10
W16 5P2.54 CONNECTOR(SHD106-A03 TYPE) 404-T2-1705 1
SW14,SW15 9P2.54 CONNECTOR(SHD106-A03 TYPE) 404-T2-1707 2
D1-9 LED(RED) 410-CD6000-122 9
IC5 INTEGRATED CIRCUIT(NJM-4556AD) 417-3113-018 1
IC1,IC2,IC3,IC4,

IC16
IC6-11 IC B1403N OR BA6124 SIP9 417-HT801K-097 6
IC17 IC(BA10358,DIP-8) 417-QD5-505 1
VR1,VR2,VR4 VR(20KB*2,RK16K12D0023-20KB*2(HF)) 418-Q2221-084 3
VR14 VR(50KB*2,RK16K12D0038-50KB*2(HF)) 418-Q2422-089 1
VR12,VR13,VR2

0
VR21 ROTARY VR(20KB,RK16K114008-20KB(HF)) 418-QD1-192 1
VR3,VR6-11 ROTARY VR(20K2B*2,RK16K124A01A-20K2B*2(HF)) 418-RMX30-254 7

W26,W13*2
W5,W7 7P2.54 STRIP PIN HEADER(L=11.8mm,180 DEGREES) 424-R1C-084 2

AWG26)
5P CONNECTOR WIRE(L=220mm,AWM2877

AWG26,P=2.5mm)
6P CONNECTOR WIRE(L=170mm,AWM2877

AWG26,P=2.5mm)
4P 2.5 CONNECTOR

WIRE(L=60mm,AWM1007,AWG26)
7P 2.5 CONNECTOR

WIRE(L=320mm,AWM2877,AWG26)
7P 2.5 CONNECTOR

WIRE(L=290mm,AWM1007/2547,AWG26/28) 404-RMX20-1865 1
3P 2.5 CONNECTOR

WIRE(L=380mm,AWM2547,AWG28)
3P 2.5 CONNECTOR

WIRE(L=360mm,AWM2547,AWG28)
3P2.5 CONNECTOR WIRE(L=300mm,AWM2877

AWG26)

IC(BA15218,DIP-8) 417-AK4-644 5

VR(20KB,RK16K1140153-20KB(HF)) 418-Q2422-090 3

4P STRIP PIN HEADER(L=15mm,P=2.54mm,180
DEGREES)

404-HPM7-1602 2

404-QSPAND-1177 2

404-QSPAND-1179 1

404-RMX20-1863 1

404-RMX20-1864 1

404-RMX20-1866 1

404-RMX20-1867 1

404-SA12-1397 1

424-CDN24A-014 3