Copyright (c) Yamaha Corporation. All rights reserved. PDF ’13.10
MG06X/MG06
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,
IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certification,
The data provided is belived 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
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.
recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.
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: This product contains chemicals known to the State of California to cause cancer, 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.
WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
0dBu is referenced to 0.775Vrms.
*1 Sensitivity is the lowest level that will produce an output of +4 dBu (1.228 V) or the nominal output level when the unit is set to maximum gain.
(All level knobs are at their maximum position.)
*2 1&Sleeve = Ground, 2&Tip = Hot, 3&Ring = Cold
*3 Tip = Signal, Sleeve = Ground
*4 1= Ground, 2 = Hot, 3 = Cold
*5 Tip = Hot, Ring = Cold, Sleeve = Ground
JACK LIST (Pin Alignment)
Input and Output JacksPolaritiesBalanced/UnbalancedConfigurations
XLR connector
TRS phone plug
Ring
TS phone plug
MIC/LINE 1/L, 2/R
STEREO OUT L, R
MIC/LINE 1/L, 2/R*
STEREO OUT L, R*
PHONES
LINE 3/4, 5/6
Pin 1: Ground
Pin 2: Hot (+)
Pin 3: Cold (-)
Tip: Hot (+)
Ring: Cold (-)
Sleeve: Ground
Tip: L
Ring: R
Sleeve: Ground
Tip: Signal
Sleeve: Ground
Balanced
Balanced
—
Unbalanced
OUTPUTINPUT
TipSleeve
TipSleeve
* These jacks also accept connection to TS phone plugs. If you use TS phone plugs, the connection will be unbalanced.
and the knob slide switch BLUE marked [80] from the
AM6X circuit board. (Fig. 5)
MG06 :
Remove the four (4) knob joint HPF BLACKs marked
[40], fi ve (5) push button HPF D-GRAY/WHITEs
marked [50], the push button HPF RED marked [60]
and the push button PFL MILKY/D-GRAY marked [70]
from the AM6 circuit board. (Fig. 5)
* The knob joint HPF BLACK marked [40], the push
button HPF D-GRAY/WHITE marked [50], the push
button HPF RED marked [60], the push button PFL
MILKY/D-GRAY marked [70] and the knob slide
switch BLUE marked [80] (AM6X circuit board only)
are not components of the AM6X circuit board
(MG06X) or AM6 circuit board (MG06).
* When replacing the AM6X circuit board (MG06X) or
AM6 circuit board (MG06), remove the knob joint HPF
BLACK marked [40], the push button HPF D-GRAY/
WHITE marked [50], the push button HPF RED
marked [60], the push button PFL MILKY/D-GRAY
marked [70] and the knob slide switch BLUE marked
[80] (AM6X circuit board only) and install them on
the new circuit board.
PCM1780DBQR (X7356A01) DAC (Digital to Analog Converter)
PIN
NO.
1
2
3
4
5
6
7
8
ZEROL/NA
MS
MC
MD
SCK
DATA
BCK
LRCK
I/OFUNCTIONNAME
Zero flag output for L-channel / No assign
O
Mode control select input
I
Mode control clock input
I
Mode control data input
I
System clock input
I
Audio data digital input
I
Audio data bit clock input
I
Audio data left and right clock input
I
PIN
NO.
9
10
11
VCC
12
AGND
13
VCOM
14
VOUTR
15
VOUTL
16
ZEROR/ZEROA
NC
NC
I/OFUNCTIONNAME
–
–
–
–
–
O
O
O
PCM1803DBR (X7357A00) ADC (Analog to Digital Converter)
PCM1803ADBR (X7357B00) ADC (Analog to Digital Converter)
PIN
NO.
10
1
2
3
4
5
6
7
8
9
VINL
VINR
VREF1
VREF2
VCC
AGND
PDWN
BYPAS
TEST
LRCK
I/OFUNCTIONNAME
I/O
Analog input (L ch)
I
Analog input (R ch)
I
Reference-voltage-1 decoupling capacitor
Reference-voltage-2 decoupling capacitor
Analog power supply +5V
Analog ground
Power-down control, active-low
I
HPF bypass control
I
Test, must be connected to DGND
I
Audio data latch enable input/output
PIN
NO.
11
12
13
14
15
16
17
18
19
20
BCK
DOUT
DGND
VDD
SCKI
OSR
FMT0
FMT1
MODE0
MODE1
I/OFUNCTIONNAME
I/O
O
-
I
I
I
I
I
I
PS6X: IC905
No connection
No connection
Power supply, 5-V
Ground
Common voltage decoupling
Analog output for R-channel
Analog output for L-channel
Zero flag output for R-channel / Zero flag output for L- and R-channels
PS6X: IC904
Audio data bit clock input/output
Audio data digital output
Digital ground
Digital power supply +3.3V
System clock input
Oversampling ratio select input
Audio data format select input 0
Audio data format select input 1
Mode select input 0
Mode select input 1
BU6945K-E2 (X9788A00) SSPO
PIN
NO.
TYPE3
1
TYPE2
2
TYPE1
3
GND
4
IOVDD
5
TYPE0
6
EFSWN
7
LED
8
FOOT
9
MUTE
10
THRU
11
GND
12
YTEST
13
TVAR
14
DVDD
15
REG18
16
* Ish: Schmitt Trigger Input
Ish+: Schmitt Trigger Input with pull-up
Ish-: Schmitt Trigger Input with pull down
I/ONAME
Ish*
Ish*
Ish*
–
–
Ish*
Ish+*
O
Ish+*
O
Ish-*
–
Ish*
Ish-*
–
O
Effect Type Select
Effect Type Select
Effect Type Select
Ground
I/O
Power Supply
Effect Type Select
Effect Switch (H û L detect)
Effect ON/OFF Status (ON: Hi/OFF: Lo)
Effect Switch (L û H detect)
Mute (MUTE ON: Hi/MUTE OFF: Lo)
Effect Through Setting (THRU: Hi)
Ground Test (for Yamaha)
Effect Type Variation Select (TVAR: Hi)
Logic Core Power Supply Input
Built -in Regulator Output
FUNCTION
PIN
NO.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
RTEST2
RTEST1
RTEST0
GND
IOVDD
PRST
SDO
SDI
WCLK
BCLK
SCLK
GND
XI
XO
ICN
CKDIV
I/ONAMEFUNCTION
Ish*
Ish*
Ish*
Ish+*
Ish*
Ish+*
Test (for Supplier)
Test (for Supplier)
Test (for Supplier)
–
Ground
–
I/O Power Supply
Parameter Fixation Mode Setting (PRST: Hi)
Audio Serial Data Output
O
Audio Serial Data Input (L ch), Parameter Input (R ch)