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POWERED MIXER
SERVICE MANUAL
· OPTION
RK512 RACK MOUNT KIT
CONTENTS
SPECIFICATIONS ( ) .......................................................3/5
PANEL LAYOUT ( )...............................................7
CIRCUIT BOARD LAYOUT ( ) ........................10
WIRING DIAGRAM( ) ....................................................11
DIMENSIONS ( ) ...................................................................13
DISASSEMBLY PROCEDURES ( ) ..................................14
LSI PIN DESCRIPTION (LSI ) .......................................24
IC BLOCK DIAGRAM (IC ) ............................................26
CIRCUIT BOARDS ( ) ................................................28
INSPECTION( ) ...................................................................50/56
PSCIRCUITBOARDREPAIRGUIDE
(PS )........................................................62/72
PARTSLIST
BLOCK & LEVEL DIAGRAM( & )
ECF
This document is printed on chlorine free (ECF) paper.
CIRCUITDIAGRAM( )
PA 011792
EMX212S: 200510-67200 HAMAMATSU, JAPAN
RK512SC: 200510-5250 Copyright (c) Yamaha Corporation. All rights reserved. PDFK897 '05.09
EMX212S
IMPORTANT NOTICE
This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic
service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and
have therefore not been restated.
WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury,
destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all
Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed
service representative.
IMPORTANT: This presentation or sale of this manual to any individual or firm does not constitute authorization certification, recognition
of any applicable technical capabilities, or establish a principalagent relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and service
departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and changes in
specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the
distributor's Service Division.
WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated
by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus).
IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (Where applicable)
components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause
cancer and/or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO
EVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux
vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
IMPORTANT. GREEN-AND-YELLOW: EARTH
BLUE: NEUTRAL
BROWN: LIVE
As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your
plug proceed as follows:
The wire which is coloured GREEN-and-YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the
safety earth symbol or colored GREEN or GREEN-and-YELLOW.
The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.
WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
2
EMX212S
SPECIFICATIONS
· General Specifications
Output RL Conditioins U, V A H, B, W, K, O UNIT
Maximum Output Power SPEAKERS OUT 4 Both ch drive, 1 kHz, MIN 220 220 220 W
8 THD+N 0.5% 130 130 130
Input Output RL Conditioins MIN TYP MAX UNIT
Frequency Response CH INPUT 1-11/12 MAIN OUT, MONITOR OUT, 10 k CH1-4 MIC/LINE: MIC 20 3.0 0.0 1.0 dB
EFFECT OUT, REC OUT Hz-20 kHz, 0 dB @ 1 kHz
SPEAKERS OUT 4 3.0 0.0 1.0
Maximum Voltage CH 1-4 INPUT B, MAIN OUT, MONITOR OUT 10 k Rs=150 CH1-4 65 dB
Gain@ 1 kHz CH 5/6-11/12 MIC MIC/LINE:MIC
Gain Error @ 1 kHz CH 1-4 INPUT B, MAIN OUT 10 k Input level: 60 dBu 2.0 4.0 6.0 dBu
It measures in each CH unit. CH 5/6-11/12 MIC CH1-4 MIC/LINE:MIC
MONITOR OUT Input level: 60 dBu 2.0 4.0 6.0
CH1-4 MIC/LINE:MIC
EFFECT OUT Input level: 60 dBu 8.0 6.0 4.0
CH1-4 MIC/LINE:MIC
REC OUT Input level: 60 dBu 12.0 10.0 8.0 dBV
CH1-4 MIC/LINE:MIC
CH 1-4 INPUT A MAIN OUT Input level: 50 dBu 2.0 4.0 6.0 dBu
MIC/LINE:MIC
CH 5/6-7/8 LINE MAIN OUT Input level: 20 dBu 2.0 4.0 6.0
(Phone)
CH 9/10-11/12 LINE MAIN OUT Input level: 20 dBu 2.0 4.0 6.0
(Pin)
Total Harmonic Distortion CH INPUT 1-11/12 MAIN OUT, MONITOR OUT, 10 k +14 dBu @ 20 Hz, 0.5 %
It measures in each CH unit. EFFECT OUT, REC OUT 1 kHz, 20 kHz
(THD+N)
Hum & Noise CH 1-4 INPUT B, MAIN OUT 10 k EIN, Rs=150 CH1-4 115 dBu
(20 Hz-20 kHz) CH 5/6-11/12 MIC MIC/LINE:MIC
It measures in each CH unit. CH INPUT 1-11/12 MAIN OUT, MONITOR OUT, Output Noise, Rs=150 50
EIN=Equivalent Input Noise EFFECT OUT CH1-4
MIC/LINE:MIC
Residual Output Noise MAIN OUT L, R 10 k Master control at 90 dBu
(20 Hz-20 kHz) MONITOR OUT minimum. 90
SPEAKERS OUT 4 65
Input Output Conditioins MIN TYP MAX UNIT
Crosstalk @ 1 kHz CH 1-4 Adjacent CH inputs 65 dB
It measures in each CH unit. MAIN OUT Input to Output 65
(LEVEL controls: minimum)
Output MIN TYP MAX UNIT
Phantom Voltage CH 1-4 INPUT B, No load 14 15 16 V
It measures in each CH unit. CH 5/6-11/12 MIC
CH & ST CH Equalization HIGH Turn over /roll-off frequency of 10 k (shelving) Hz
MID shelving :3dB below maximum 2.5 k (peaking)
LOW variable level. ±15dB maximum 100 (shelving)
Internal Digital Effect 16 programs, Parameter control
FOOT SW ON/OFF
Level Meters 2×5-points LED level meter [MAIN(L,R)], 5-points LED level meter [MONITOR] +6, +3, 0, 5, 10 [dB]
FCL Sensivity Input signal level 75dBu: LED on, CH1-4 MIC/LINE:MIC B Input, CH 5/6-11/12 MIC Input
Protection Power Amplifier POWER switch on/off mute
DC-fault :power supply shutdown /manual reset
Thermal /heatsink temp 90°C:output mute /auto reset
Vl limiter /RL 2
Clip limiter /THD 1 %, Indicator × 2
Power Supply Thermal /heatsink temp 100°C :power supply shutdown /manual reset
3
EMX212S
MIN TYP MAX UNIT
Power Consumption 300 W
AC Cord Length 2450 2500 2550 mm
Dimensions Height 284 mm
Depth 264
Width 442.5
Net Weight 8 kg
Included Accessories Power cord, Rubber stabilizers × 2, Owener's Manual
Options RACK MOUNT KIT (RK512), FOOT SW (FC5)
Note: All level control normally: Maximum level, Output impedance of signal generator :150
· Input Characteristics
Input Terminals MIC/ Actual For Use with Input Level Connector
LINE Load Normal Sensitivity *2 Nominal ( position) Max. before Clip
Impedance
CH INPUT 1-4 XLR MIC 2 k 50-600 Mics 60 dBu (0.775 mV) 35 dBu (13.8 mV) 15 dBu (138 mV) XLR-3-31 type *3
LINE 30 dBu (24.5 mV) 5 dBu (436 mV) +15 dBu (4.36 V)
Phone MIC 6 k 600 Lines 50 dBu (2.45 mV) 25 dBu (43.6 mV) 5 dBu (436 mV) Phone Jack *4
LINE 20 dBu (77.5 mV) +5 dBu (1.38 V) +25 dBu (13.8 V)
CH INPUT 5/6, 7/8 XLR 2 k 50-600 Mics 60 dBu (0.775 mV) 35 dBu (13.8 mV) 15 dBu (138 mV) XLR-3-31 type *3
Phone 10 k 600 Lines 20 dBu (77.5 mV) +5 dBu (1.38 V) +25 dBu (13.8 V) Phone Jack *5
CH INPUT 9/10,11/12 XLR 2 k 50-600 Mics 60 dBu (0.775 mV) 35 dBu (13.8 mV) 15 dBu (138 mV) XLR-3-31 type *3
Pin 10 k 600 Lines 20 dBu (77.5 mV) +5 dBu (1.38 V) +25 dBu (13.8 V) RCA Pin Jack
*1 0 dBu is referenced to 0.775 Vrms.
*2 Sensitivity is the lowest level that will produce an output of +4 dB (1.23 V), or the nominal output level when the unit is set to maximum level.
(All level controls are at maximum position.)
*3 XLR-3-31 type connectors are balanced. (1=GND, 2=HOT, 3=COLD)
*4 Phone Jacks are balanced. (Tip=HOT, Ring=COLD, Sleeve=GND)
*5 Phone Jacks are unbalanced.
· Output Characteristics
Output Terminals Actual Source For Use with Output Level Connector
Impedance Normal Norminal Max. before Clip
SPEAKERS 0.1 4 Speakers 50 W 220 W [A1, B1] SPEAKON
[A1, A2, B1, B2] [A2, B2] Phone Jack
MAIN OUT [L, R] 600 10 k Lines +4 dBu (1.23 V) +20 dBu (7.75 V) Phone Jack*2
EFFECT OUT 600 10 k Lines +4 dBu (1.23 V) +20 dBu (7.75 V) Phone Jack*2
MONITOR OUT 600 10 k Lines +4 dBu (1.23 V) +20 dBu (7.75 V) Phone Jack*2
REC OUT [L, R] 600 10 k Lines 10 dBu (316 mV) +10 dBu (3.16 V) RCA Pin Jack
*1 0 dBu is referenced to 0.775 Vrms. 0dBV is referenced to 1 Vrms.
*2 Phone Jacks are unbalanced.
4
EMX212S
·
RL
SPEAKERS OUT 4 A/B , 200 W
8 1kHz, THD+N 0.5 120
RL
CH INPUT 1-11/12 MAIN OUT, MONITOR OUT, 10 k CH1-4 MIC/LINE: MIC 20 3.0 0.0 1.0 dB
EFFECT OUT, REC OUT Hz-20 kHz, 0 dB @ 1 kHz
SPEAKERS OUT 4 3.0 0.0 1.0
@1kHz CH 1-4 INPUT B, MAIN OUT, MONITOR OUT 10 k Rs=150 CH1-4 65 dB
CH 5/6-11/12 MIC MIC/LINE:MIC
@ 1 kHz CH 1-4 INPUT B, MAIN OUT 10 k Input level: 60 dBu 2.0 4.0 6.0 dBu
CH 5/6-11/12 MIC CH1-4 MIC/LINE:MIC
MONITOR OUT Input level: 60 dBu 2.0 4.0 6.0
CH1-4 MIC/LINE:MIC
EFFECT OUT Input level: 60 dBu 8.0 6.0 4.0
CH1-4 MIC/LINE:MIC
REC OUT Input level: 60 dBu 12.0 10.0 8.0 dBV
CH1-4 MIC/LINE:MIC
CH 1-4 INPUT A MAIN OUT Input level: 50 dBu 2.0 4.0 6.0 dBu
MIC/LINE:MIC
CH 5/6-7/8 LINE MAIN OUT Input level: 20 dBu 2.0 4.0 6.0
(Phone)
CH 9/10-11/12 LINE MAIN OUT Input level: 20 dBu 2.0 4.0 6.0
(Pin)
CH INPUT 1-11/12 MAIN OUT, MONITOR OUT, 10 k +14 dBu @ 20 Hz, 0.5 %
EFFECT OUT, REC OUT 1 kHz, 20 kHz
(THD+N)
& CH 1-4 INPUT B, MAIN OUT 10 k , 115 dBu
(20 Hz-20 kHz) CH 5/6-11/12 MIC Rs=150 CH1-4
MIC/LINE:MIC
CH INPUT 1-11/12 MAIN OUT, MONITOR OUT, Output Noize, Rs=150 50
EFFECT OUT CH1-4
MIC/LINE:MIC
MAIN OUT L, R 10 k Master = 90 dBu
(20 Hz-20 kHz) MONITOR OUT 90
SPEAKERS OUT 4 65
@ 1 kHz CH 1-4 65 dB
MAIN OUT LEVEL = 65
CH 1-4 INPUT B, 14 15 16 V
CH 5/6-11/12 MIC
HIGH 10 k (
Hz
/ :
MID 2.5 k (
3 dB
LOW ± 15dB ( ) 100 (
16 PARAMETER
ON/OFF
2 × 5 LED [MAIN(L,R)],5 LED [MONITOR]+6,+3,0, 5, 10[dB]
FCL 75dBu LED , CH1-4 MIC/LINE:MIC B, CH 5/6-11/12 MIC
POWER On/Off
DC : /
/ 90 : /
Vl /RL 2
Clip /THD 1 % , × 2
/ 100 : /
5
EMX212S
350 W
2450 2500 2550 mm
284 mm
264
442.5
8 kg
× 2 × 2
(RK512) (FC5)
Note: LEVEL = = 150
·
MIC/
LINE *2
CH INPUT 1-4 XLR MIC 2 k 50-600 60 dBu (0.775 mV) 35 dBu (13.8 mV) 15 dBu (138 mV) XLR-3-31 *3
LINE 30 dBu (24.5 mV) 5 dBu (436 mV) +15 dBu (4.36 V)
Phone MIC 6 k 600 50 dBu (2.45 mV) 25 dBu (43.6 mV) 5 dBu (436 mV) *4
LINE 20 dBu (77.5 mV) +5 dBu (1.38 V) +25 dBu (13.8 V)
CH INPUT 5/6, 7/8 XLR 2 k 50-600 60 dBu (0.775 mV) 35 dBu (13.8 mV) 15 dBu (138 mV) XLR-3-31 *3
Phone 10 k 600 20 dBu (77.5 mV) +5 dBu (1.38 V) +25 dBu (13.8 V) *5
CH INPUT 9/10, 11/12 XLR 2 k 50-600 60 dBu (0.775 mV) 35 dBu (13.8 mV) 15 dBu (138 mV) XLR-3-31 *3
Pin 10 k 600 20 dBu (77.5 mV) +5 dBu (1.38 V) +25 dBu (13.8 V) RCA
*1 0 dBu = 0.775 Vrms.
*2 + 4 dB(1.23 V)
*3 XLR-3-31 1 2 3
*4 T R S
*5
·
SPEAKERS 0.1 4 Speakers 50 W 200 W [A1, B1]
[A1, A2, B1, B2] [A2, B2]
MAIN OUT [L, R] 600 10 k +4 dBu (1.23 V) +20 dBu (7.75 V) *2
EFFECT OUT 600 10 k +4 dBu (1.23 V) +20 dBu (7.75 V) *2
MONITOR OUT 600 10 k +4 dBu (1.23 V) +20 dBu (7.75 V) *2
REC OUT [L, R] 600 10 k 10 dBu (316 mV) +10 dBu (3.16 V) RCA
*1 0 dBu = 0.775 Vrms 0dBV=1Vrms
*2
6
EMX212S
PANEL LAYOUT
· Controls on Each channel · Digital Effect Section
1 1 1
2
3 3 3
9
4 4 4
0
5 5 5
q
6
8
7 w
e
1 FCL (Feedback Channel Locating) indicator 9 PROGRAM selector
2 Equalizer gain control (HIGH, MID, and LOW) 0 PARAMETER control
3 MONITOR control q DIGITAL EFFECT ON switch
4 EFFECT control w EFFECT OUT jack
5 LEVEL control e FOOT SW jack
6 LINE/MIC switch (Channels 1 to 4)
7 INPUT A and INPUT B jacks (Channels 1 to 4)
8 LINE and MIC jacks (Channels 5/6 to 11/12)
1 FCL 9 PROGRAM
2 EQ HIGH MID LOW 0 PARAMETER
3 MONITOR q DIGITAL EFFECT ON
4 EFFECT w EFFECT OUT
5 LEVEL e FOOT SW
6 LINE/MIC
7 INPUT A/B 1 4
8 LINE/MIC 5/6 11/12
7
EMX212S
· MAIN Section MAIN · MONITOR Section MONITOR
p d
a s
r u
t y
o i
f
r Graphic Equalizer faders p Graphic Equalizer faders
t EFFECT RETURN control a EFFECT RETURN control
y MASTER control s MASTER control
u LEVEL meters d LEVEL meters
i MAIN OUT L and R jacks f MONITOR OUT jack
o REC OUT L and R jacks
r GEQ p GEQ
t EFFECT RETURN a EFFECT RETURN
y MASTER s MASTER
u LEVEL d LEVEL
i MAIN OUT L/R f MONITOR OUT
o REC OUT L/R
8
EMX212S
· POWER Section POWER
g PHANTOM switch
h LIMITER indicators
g j POWER AMP switch
k YS Processing switch
l STAND-BY switch
; POWER switch and indicator
h g PHANTOM
h LIMITER
j j POWER AMP
k YS Processing
l STAND-BY
; POWER
k
l
;
· Rear panel
x z
z SPEAKERS jacks
x AC IN connector
z SPEAKERS
x AC IN
9
EMX212S
CIRCUIT BOARD LAYOUT
· Rear View
PA
OUT
· Top View
PS
OUT
DSP
SW
JACK
MIX
· Front View · Side View
OUT
MIX
PA
DSP
SW
PS
JACK
10
EMX212S
WIRING DIAGRAM
BLACK
5
W106
W305 OUT W107
W103
VIOLET
1
CN303 2
W304 W303 YELLOW
W101 W102
CN301 CN302
CN101(14P)
PA
ORANGE
BLACK
6
BLUE
7 8 3 q 4
CN406
PS
BROWN
CN407
W401
CN408
FAN
CN404
CN402
W402
CN416(13P)
CN401 CN410 CN411 CN415
(14P)
YELLOW
GRAY 9
0
GRAY
w
W601 W602
SW
MIX
CN301(20P) CNM02(20P)
CN001 CN002 CN101 CN102 CN201 CN202
(3P) (3P) (3P) (3P) (3P) (3P)
DSP
CN401 CN302 CN402
(13P) (5P) (7P)
CN001 CN002 CN101 CN102 CN201 CN202
(3P) (3P) (3P) (3P) (3P) (3P)
indicates that connectors are connected
CN402 CN401 directly to circuit boards.
(5P) (7P)
JACK
11
EMX212S
No. Part No. Assembly Name Connection Remarks
1 (WE29820) Connector Assembly B&C PA-W102 <-> OUT-CN301 Violet
2 (WE29900) Connector Assembly B&C PA-W101 <-> OUT-CN302 Yellow
3 (WE29850) Connector Assembly B&C PA-W106 <-> PS-CN406 Orange
4 (WE29860) Connector Assembly B&C PA-W107 <-> PS-CN408 Blue
5 (WE29910) Connector Assembly B&C PA-W103 <-> OUT-CN303 Black
6 (WF58250) Connector Assembly B&C OUT-W305 <-> PS-CN406 Black
7 (WE29930) Connector Assembly B&C OUT-W304 <-> PS-CN402 Brown
8 (WE29940) Connector Assembly B&C OUT-W303 <-> PS-CN401 Gray
9 (WE29880) Connector Assembly B&C SW-W602 <-> PS-CN411 Yellow
0 (WE29940) Connector Assembly B&C SW-W601 <-> PS-CN410 Gray
q (WE34870) Jumper Wire SMV2J P=2 14-300 PS-CN415 <-> PA-CN101
w (WE25580) Jumper Wire SMV2J P=2 13-230 PS-CN416 <-> MIX-CN401
Parts in parentheses are not available as spare parts.
12
EMX212S
DIMENSIONS
264
442.5
2.5 440
286
284
2
66.1 307.8 66.1
71 298 71
54
108
Unit: mm
13
EMX212S
DISASSEMBLY PROCEDURES
· Preparing ·
A screwdriver with a long shaft is required to remove some
screws.
220 mm or more
1. Front Panel Unit 1.
(Time required: about 5 minutes) 5
1-1 Remove the eight (8) screws marked [690]. (Fig.1) 1-1 [690] 8
· Remove the jumper wire from CN416 on the PS circuit ( 1)
board and the wires (gray and yellow) from CN410 and · PS CN416 CN410
CN411 on the PS circuit board. The front panel unit can CN411
then be removed. (Photo.1 & Photo2) 1 2
* When removing the front panel printed only, remove the
screws and knobs marked with . (Fig.1) 1
[690] [630] [170] [130] [150] [630] [180][150][180] [130]
[690]
[630]
[50]
[50]
[130]
[630]
[690] [630][50] [630] [130] [690]
[50]: Bind Head Screw 4x8 MFZN2B3 (WE969000)
[130]: Bind Head Tapping Screw-S 3x6 MFZN2B3 (WE877800)
[150]: Bind Head Tapping Screw-S 3x6 MFZN2B3 (WE877800)
[170]: Bind Head Tapping Screw-B 3x12 MFZN2B3 (WE998100)
[180]: Flat Fillister H. Tapping 3x8 MFZN2W3 (WF790100)
[630]: Bind Head Tapping Screw-P 4x16 MFZN2B3 (WE980800)
[690]: Bind Head Tapping Screw-P 5x25 MFZN2W3 (WG158600)
Fig.1 1
PS circuit board (PS )
PS circuit board
(PS )
CN416
CN410 CN411
Photo.1 1
Photo.2 2
14
EMX212S
2. JACK, DSP and MIX Circuit Boards 2. JACK DSP MIX
1 Remove the front panel unit. (See procedure 1.) 1 1
2 Remove the knobs specified in the Fig.2 and Table.1. 2 2 1
3 Remove the eighteen (18) screws marked [500], twelve (12) 3 [500] 18 [490] 12 13
screws marked [490] and thirteen (13) hexagonal nuts and 2 3
washers. (Fig.2 & Fig.3) 4 [510] 14 JACK DSP MIX
4 Remove the fourteen (14) screws marked [510]. The JACK, 3
DSP and MIX circuit boards can then be removed together. 5 [514] 4 H
(Fig.3) 4
5 Remove the four (4) screws marked [514] and the shield 2-1 JACK 5
plate can then be removed. (Fig.4) 2-1-1 [511] 6 2 [410] 1 [430]
2-1 JACK Circuit Board 2 JACK 3 4
(Time required: about 5 minutes) 2-2 DSP 4
2-1-1 Remove the two (2) hexagonal spacer marked [511], the 2-2-1 [470] 2 DSP 3
screw marked [410] and the two (2) screws marked [430]. 2-2-2 [450] 4 MIX DSP
The JACK circuit board can then be removed. (Fig.3 & 3
Fig.4) 2-3 MIX 1
2-2 DSP Circuit Board 2-3-1 DSP 3
(Time required: about 4 minutes) JACK MIX
2-2-1 Remove the two (2) screws marked [470] and the cover JACK 3
DSP. (Fig.3)
2-2-2 Remove the four (4) screws marked [450]. The DSP circuit
3
board can then be separated from the MIX circuit board.
JACK: [370]
(Fig.3)
[610] (LINE/MIC)
2-3 MIX Circuit Board (Time required: about 1 minute)
MIX: [340] (PHANTOM,YSProcessing,
2-3-1 Remove the shield. (Fig.3)
STAND-BY)
* When attaching the JACK circuit board, be sure to pass [390]
the jumper wire from the MIX circuit board through the [580]
slit on the JACK circuit board. (Photo.3)
[340] PFL 3
* The following parts are not included in the circuit [610] HPF
boards. Be sure to remove them when replacing the 4
circuit boards. (Fig.3)
JACK: [370] Knob Black
[610] Button D-Gray/White (LINE/MIC)
MIX: [340] Button Milky/D-Gray (PHANTOM,
YSProcessing, STAND-BY)
[390] Hexagonal Spacer
[580] Button
* When replacing [340] Button Milky/D-Gray, replace
three buttons at the save time. Also when replacing
[610] Button D-Gray/White, replace four buttons at the
same time.
3. Front Frame 3. 10
(Time required: about 10 minutes) 3-1 (1 )
3-2 JACK DSP MIX (2
3-1 Remove the front panel unit. (See procedure 1.)
)
3-2 Remove the JACK, DSP and MIX circuit boards. (See
3-3 [300] 2 3
procedure 2.)
3-4 [260] 10
3-3 Remove the two (2) screws marked [300]. (Fig.3)
( 3)
3-4 Remove the ten (10) screws marked [260]. The front frame
can then be separated from the front panel. (Fig.3)
15
EMX212S
[490]
[490]
[560]
[500]
[600]
[500]
[570]
[490]: Hex. Socket Set Screw 3x6 MFZN2B3 (WF419300)
[500]: Bonding Tapping Screw-B 3x10 MFZN2B3 (WE878000)
Fig.2 2
Table.1 1
No. Description Q'ty Control
560 Knob White/M-Gray 8 LEVEL (CH1-11/12)
570 Knob Red/M-Gray 2 MASTER (MONITOR, MAIN)
600 Knob Black 1 PROGRAM
16
EMX212S
[470]
DSP circuit board
DSP [450]
[510]
Shield
[260] DSP
SW circuit board
SW
[510]
Cover DSP
[390] DSP
[430]
[290] [390]
[580]
[510]
[260]
[390] [340]
Hexagonal nut & washer
& [300]
[410]
Power switch knob [610] [370] [510]
PSW
Switch assembly
Ass'y
[260]: Bind Head Tapping Screw-P 3x10 MFZN2B3 (WF268000)
[290]: Bind Head Tapping Screw-P 3x6 MFZN2W3 (WE877900)
[300]: Hex. Socket Set Screw 3x6 MFZN2B3 (WF419300)
[410]: Bind Head Tapping Screw-S 3x5 MFZN2W3 (WE980200)
[430]: Bind Head Tapping Screw-P 3x6 MFZN2W3 (WE877900)
[450]: Bind Head Tapping Screw-P 3x6 MFZN2W3 (WE877900)
[470]: Bind Head Tapping Screw-S 3x5 MFZN2W3 (WE980200)
[510]: Bind Head Tapping Screw-P 3x10 MFZN2W3 (WF001000)
Fig.3 3
Shield plate
H
[514]
[511]
[511]: Hexagonal Spacer (WF514300) M3
[514]: Bonding Tapping Screw-S 3x6 MFZN2W3 (WF572000)
Fig.4 4
17
EMX212S
CN401
Slit
( )
JACK circuit board MIX circuit board
(JACK ) (MIX )
Photo.3 3
4. SW Circuit Boards 4. SW 5
(Time required: about 5 minutes) 4-1 (1 )
4-1 Remove the front panel unit. (See procedure 1.) 4-2 [300] 2
4-2 Remove the two (2) screws marked [300]. The switch Ass'y 3
assembly can then be removed from the front panel unit 4-3 PSW ( 3)
(Fig.3) 4-4 [290] 2 PS SW
4-3 Remove the power switch knob. (Fig.3) ( 3)
4-4 Remove the two (2) screws marked [290]. The SW circuit
board can then be removed from the holder. (Fig.3)
18
EMX212S
5. PS Circuit Board 5. PS 10
(Time required: about 10 minutes) 5-1 (1 )
5-1 Remove the front panel unit. (See procedure 1.) 5-2 4 2
5-2 Remove the wires specified in the Photo.4 and Table.2. 5-3 [628A] 2 ( 5)
5-3 Remove the two (2) screws marked [628A] and the GND 5-4 [640] 6 PS ( 5)
wire. (Photo.5)
5-4 Remove the six (6) screws marked [640] and the spacers.
The PS circuit board can then be removed. (Fig.5)
Rear grounding brackets
[624B]
PS circuit board
PS
[628B]
Case
[624A]
Fan DC
[628B] [627]
[640] Spacer
[640]: Bind Head Tapping Screw-P 3x10 MFZN2W3 (WF001000)
[624A]: Bind Head Tapping Screw-P 3x6 MFZN2W3 (WE877900)
[624B]: Bind Head Tapping Screw-P 3x6 MFZN2W3 (WE877900)
[627]: Bind Head Screw 4x30 MFZN2W3 (WF105900)
[628B]: Bind Head Screw 4x8 MFZN2W3 (WE968500)
Fig.5 5
19
EMX212S
Table.2 2
No. Connector Color of Wire Connected to
4
1 CN401 GRAY OUT Circuit Board
5
2 CN402 BROWN OUT Circuit Board
3 CN404 -- Fan
6 4 CN406 ORANGE PA Circuit Board
5 CN407 BLACK OUT Circuit Board
6 CN408 BLUE PA Circuit Board
7 CN415 -- Power amplifier unit
3
2
1 7
PS circuit board (PS )
Photo.4 4
PS circuit board (PS )
[624A]
[628A] [628A]
Fan (DC )
[628B]
[628B]
[624A]: Bind Head Tapping Screw-P 3x6 MFZN2W3 (WE877900)
[628A]: Bind Head Screw 4x8 MFZN2W3 (WE968500)
[628B]: Bind Head Screw 4x8 MFZN2W3 (WE968500)
Photo.5 5
6. Fan (Time required: about 5 minutes) 6. DC 5
6-1 Remove the front panel unit. (See procedure 1.) 6-1 (1 )
6-2 Remove the PS circuit board. (See procedure 5.) 6-2 PS (5 )
6-3 Remove the screw marked [624A]. (Fig.5 & Photo.5) 6-3 [624A] 1 ( 5 5)
6-4 Remove the two (2) screws marked [628B]. The fan and 6-4 [628B] 2 DC
case can then be removed. (Fig.5 & Photo.5) 5 5
6-5 Remove the two (2) screws marked [627]. The fan can then 6-5 [627] 2 DC ( 5)
be separated from the case. (Fig.5)
20
EMX212S
7. Rear Panel Unit 7. 5
(Time required: about 5 minutes) 7-1 (1 )
7-1 Remove the front panel unit. (See procedure 1.) 7-2 PS (5 )
7-2 Remove the PS circuit board. (See procedure 5.) 7-3 DC (6 )
7-3 Remove the fan. (See procedure 6.) 7-4 [624B] 4
7-4 Remove the four (4) screws marked [624B] and the rear ( 5)
grounding brackets. (Fig.5) 7-5 [630] 6
7-5 Remove the six (6) screws marked [630]. The rear panel unit ( 1)
can then be removed. (Fig.1)
* When removing the rear panel only, remove the screws 6
marked with . (Fig.6)
8. OUT Circuit Board 8. OUT 10
(Time required: about 10 minutes) 8-1 (7 )
8-1 Remove the rear panel unit. (See procedure 7.) 8-2 OUT CN301 CN302 CN303 (
8-2 Remove the wires (violet, yellow and black) from CN301, ) ( 6)
CN302 and CN303 on the OUT circuit board. (Photo.6) 8-3 [190] 2 1 ( 6)
8-3 Remove the two (2) screws marked [190] and the spacer. 8-4 [150] 2 [170] 2 [180] 4
(Fig.6) 2 ( 1 6)
8-4 Remove the two (2) screws marked [150], two (2) screws 8-5 [185] 1 AC
marked [170], four (4) screws marked [180] and two OUT ( 6 7)
hexagonal nuts. (Fig.1 & Fig.6)
8-5 Remove the screw marked [185] and the GND wire from the
AC inlet. The OUT circuit board can then be removed.
(Fig.6 & Photo.7)
[190] Back
Spacer Hexagonal nut
[130] [180]
[150] [170]
OUT circuit board [50]
OUT
[130]
[185]
Power amplifier unit
Case
[50]: Bind Head Screw 4x8 MFZN2B3 (WE969000)
[130]: Bind Head Tapping Screw-S 3x6 MFZN2B3 (WE877800)
[150]: Bind Head Tapping Screw-S 3x6 MFZN2B3 (WE877800)
[170]: Bind Head Tapping Screw-B 3x12 MFZN2B3 (WE998100)
[180]: Flat Fillister H. Tapping 3x8 MFZN2W3 (WF790100)
[190]: Bind Head Tapping Screw-P 3x6 MFZN2W3 (WE877900)
Fig.6 6
21
EMX212S
[185]
CN303
CN301 CN302
Photo.6 6 [185]: Bind Head Screw 4x8 MFZN2W3 (WF106500)
Photo.7 7
9. Power Amplifier Unit 9.
(Time required: about 10 minutes) 10
9-1 Remove the rear panel unit. (See procedure 7.) 9-1 (7 )
9-2 Remove the OUT circuit board. (See procedure 8.) 9-2 OUT (8 )
9-3 Remove the five (5) screws marked [130]. (Fig.1 & Fig.6) 9-3 [130] 5 ( 1 6)
9-4 Remove the four (4) screws marked [50]. The power 9-4 [50] 4
amplifier unit then can be removed from the rear panel unit, ( 1 6)
together with the case. (Fig.1 & Fig.6) 9-5 ( 8
9-5 Remove the wires from the slit of the case. (Photo.8 & 9)
Photo.9)
Slit Slit
Photo.8 8 Photo.9 9
22
EMX212S
10. PA Circuit Board 10. PA 10
(Time required: about 10 minutes) 10-1 (7 )
10-1 Remove the rear panel unit. (See procedure 7.) 10-2 OUT (8 )
10-2 Remove the OUT circuit board. (See procedure 8.) 10-3 (9 )
10-3 Remove the power amplifier unit. (See procedure 9.) 10-4 [50a] 10 ( 7)
10-4 Remove the ten (10) screws marked [50a]. (Fig.7) 10-5 [60a] 4 PA ( 7)
10-5 Remove the four (4) screws marked [60a]. The PA circuit
board then can be removed. (Fig.7)
[50a]
[60a]
Radiation sheet
[50a]
C
[50a]
[60a]
Radiation sheet
D
Heat sink
[50a]: Bind Head Screw 3x12 MFZN2Y (VB763800)
[60a]: Bind Head Tapping Screw-B 3x8 MFZN2BL (EP600190)
Fig.7 7
23
EMX212S
LSI PIN DESCRIPTION
AK5381VT-E2 (X5219A00) ADC (Analog to Digital Converter).......................... 24
PCM1742KEG/2K (X3538A00) DAC (Digital to Analog Converter).................... 24
MX23L8103TC-90G (X5922A00) CPU ............................................................... 24
YMW767-VTZ (X6055A00) CPU......................................................................... 25
· AK5381VT-E2 (X5219A00) ADC (Analog to Digital Converter) DSP: ICM04
PIN PIN
No. NAME I/O FUNCTION No. NAME I/O FUNCTION
1 AINR I Rch Analog input pin 9 SDTO O Audio serial data output pin
2 AINL I Lch Analog input pin 10 LRCK I/O Output channnel clock pin
3 CKS1 I Mode select 1 pin 11 MCLK I Master clock input pin
4 VCOM O Common voltage output pin 12 SCLK I/O Audio serial data clock pin
5 AGND - Analog ground 13 PDN I Power down mode pin
6 VA - Analog power supply 14 DIF I Audio interface format pin
7 VD - Digital power supply 15 CKS2 I Mode select 2 pin
8 DGND - Digital ground 16 CKS0