Yamaha MG06, MG06X Service manual

MIXING CONSOLE

SERVICE MANUAL

MG06X

MG06

CONTENTS
SPECIFICATIONS ................................	3/5
PANEL LAYOUT .......................	7
DIMENSIONS ..............................................	8
CIRCUIT BOARD LAYOUT
.................................................	8
DISASSEMBLY PROCEDURE ...............	9
LSI PIN DESCRIPTIONLSI ...............	13
CIRCUIT BOARDS .........................	14
INSPECTIONS ..............................................	17
PARTS LIST
BLOCK & LEVEL DIAGRAM
CIRCUIT DIAGRAM

PA 012112

HAMAMATSU, JAPAN

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 :

IMPORTANT :

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.

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 principal-agent relationship of any form.

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 distributorÕs Service Division.

WARNING :

IMPORTANT :

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.)

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.

2

MG06X/MG06

SPECIFICATIONS

General Specifications

0 dBu = 0.775 Vrms Output impedance of signal generator (Rs) = 150 Ω

All level knobs are nominal if not specified.

	Frequency Response	Input to STEREO OUT	+0.5 dB/-0.5 dB (20 Hz to 20 kHz),
			refer to the nominal output level @ 1 kHz, GAIN knob: Min
	Total Harmonic Distortion	Input to STEREO OUT	0.01 % @+8 dBu (20 Hz to 20 kHz), GAIN knob: Min
	(THD+N)		0.003 % @+18 dBu (1 kHz), GAIN knob: Min
	Hum&Noise *1	Equivalent Input Noise	-128 dBu (Mono Input Channel, Rs: 150Ω, GAIN knob: Max)
	(20 Hz to 20 kHz)	Residual Output Noise	-102 dBu (STEREO OUT, STEREO LEVEL knob: Min)
	Crosstalk (1 kHz) *2		-88 dB
	Input Channels		6 channels: Mono (MIC/LINE): 2, Stereo (LINE): 2
	Ouput Channels		STEREO OUT: 2, PHONES: 1
	Bus		STEREO: 1
		PAD	26 dB
		HPF	80 Hz, 12 dB/oct
	Mono Input Channel Function	EQ HIGH	Gain: +15 dB/-15 dB, Frequency: 10 kHz shelving
		EQ LOW	Gain: +15 dB/-15 dB, Frequency: 100 Hz shelving
		PEAK LED	LED turns on when post EQ signal reaches 3 dB below clipping
			(+11 dBu)
	Level Meter	Post STEREO LEVEL	2 x 7-segment LED meter
		Knob	[PEAK (+11), +6, +3, 0, -3, -10, -20 dB]
	Internal Digital Effect (MG06X)	SPX Algorithm	6 programs
	Phantom Power Voltage		+48 V
	Power Supply Adaptor		PA-130 (DC12 V/1.0 A, Cable length = 1.8 m), 120 V, 60 Hz, or
			MU18 (DC12 V/1.5 A, Cable length = 1.5 m), 100 V-240 V,
			50 Hz/60 Hz, or an equivalent recommended by Yamaha
	Power Consumption		12 W
	Dimensions (W×H×D)		149 mm×62 mm×202 mm (5.9"x 2.4"x 7.9")
	Net Weight		MG06: 0.9 kg (2.0 lbs), MG06X: 0.9 kg (2.0 lbs)
	Optional Accessory		Mic Stand Adaptor: BMS-10A
	Included Accessory		AC power adaptor, Owner’s Manual, Technical Specifications
	Operating Temperature		0 to +40°C

*1 Noise is measured with A-weighting filter. *2 Crosstalk is measured with 1 kHz band pass filter.

Analog Input Characteristics

		PAD	GAIN	Actual	For Use		Input level
	Input Jacks			Load	With			Max. before	Connector
		26 dB	Trim			Sensitivity *1	Nominal
				Impedance	Nominal			clip
			+64 dB			-72 dBu	-60 dBu	-46 dBu
						(0.195 mV)	(0.775 mV)	(3.884 mV)
		OFF
			+20 dB			-28 dBu	-16 dBu	-2 dBu
					50-6001	(30.85 mV)	(122.8 mV)	(615.6 mV)	Combo jack*2
	MIC/LINE 1/L,2/R			3 kΩ
					Mics/Lines				(Balanced)
			+38 dB			-46 dBu	-34 dBu	-20 dBu
						(3.884 mV)	(15.46 mV)	(77.50 mV)
		ON
			-6 dB			-2 dBu	+10 dBu	+24 dBu
						(615.6 mV)	(2.451 V)	(12.28 V)
	LINE 3/4, 5/6	-	-	10 kΩ	600 Ω Lines	-22 dBu	-10 dBu	+4 dBu	Phone jack*3
						(61.56 mV)	(245.1 mV)	(1.228 V)	(Unbalanced)

3

MG06X/MG06

Analog Output Characteristics

	Output Jacks	Actual Source	For Use With	Output level		Connector
		Impedance	Nominal	Nominal	Max. before clip
				+4 dBu	+18 dBu	XLR-3-32 *4
	STEREO OUT L, R	75 Ω	10 kΩ Lines			Phone jack *5
				(1.228 V)	(6.156 V)
						(Balanced)
	PHONES	33 Ω	40 Ω Lines	2.4 mW + 2.4 mW	24 mW + 24 mW	Stereo phone jack

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 Jacks	Polarities	Balanced/Unbalanced	Configurations
	Pin 1: Ground		XLR connector
MIC/LINE 1/L, 2/R
	Pin 2: Hot (+)	Balanced
STEREO OUT L, R
	Pin 3: Cold (-)		INPUT	OUTPUT
MIC/LINE 1/L, 2/R*	Tip: Hot (+)		TRS phone plug
	Ring: Cold (-)	Balanced
STEREO OUT L, R*				Ring
	Sleeve: Ground
PHONES	Tip: L
	Ring: R	—	Sleeve	Tip
	Sleeve: Ground
			TS phone plug
LINE 3/4, 5/6	Tip: Signal	Unbalanced
	Sleeve: Ground
			Sleeve	Tip

* These jacks also accept connection to TS phone plugs. If you use TS phone plugs, the connection will be unbalanced.

4

MG06X/MG06

0 dBu = 0.775 Vrms :150 Ω

		→ STEREO OUT	+0.5 dB/-0.5 dB 20 Hz ̃ 20 kHz
			refer to the nominal output level@1 kHz GAIN
	(THD+N)	→ STEREO OUT	0.01 % @+8 dBu 20 Hz ̃ 20 kHz
			GAIN 0.003 % @+18 dBu 1 kHz GAIN
	& *1 (20 Hz 20 kHz)		-128 dBu Rs:150 Ω GAIN
			-102 dBu STEREO OUT STEREO LEVEL
	(1 kHz) *2		-88 dB
			6 MIC/LINE 2 LINE 2
			STEREO OUT 2 PHONES 1
			STEREO 1
		PAD	26 dB
		HPF	80 Hz 12 dB/oct
		EQ HIGH HIGH	+15 dB/-15 dB 10 kHz
		EQ LOW LOW	+15 dB/-15 dB 100 Hz
		PEAK LED	+11 dBu 3 dB
		STEREO LEVEL	2×7 LED
			PEAK +11 +6 +3 0 -3 -10 -20 dB
	(MG06X)	SPX	6
			+48 V
			MU18 DC12V/1.5A =1.5m
			100V-240V 50Hz/60Hz
			12 W
	× ×		149 mm×62 mm×202 mm
			MG06 0.9 kg MG06X 0.9 kg
	( )		BMS-10A
			Technical Specifications
			0 to +40

*1: A-weighting *2:1 kHz

		PAD
						*1
		26 dB
			+64 dB			-72 dBu	-60 dBu	-46 dBu
						(0.195 mV)	(0.775 mV)	(3.884 mV)
		OFF
			+20 dB			-28 dBu	-16 dBu	-2 dBu
					50-600 Ω	(30.85 mV)	(122.8 mV)	(615.6 mV)	*2
	MIC/LINE 1/L,2/R			3 kΩ
			+38 dB		Mics/Lines	-46 dBu	-34 dBu	-20 dBu	( )
						(3.884 mV)	(15.46 mV)	(77.50 mV)
		ON
			-6 dB			-2 dBu	+10 dBu	+24 dBu
						(615.6 mV)	(2.451 V)	(12.28 V)
	LINE 3/4, 5/6	-	-	10 kΩ	600 Ω Lines	-22 dBu	-10 dBu	+4 dBu	*3
						(61.56 mV)	(245.1 mV)	(1.228 V)	( )

5

MG06X/MG06

				+4 dBu	+18 dBu	XLR-3-32 *4
	STEREO OUT L, R	75 Ω	10 kΩ Lines			*5
				(1.228 V)	(6.156 V)
						( )
	PHONES	33 Ω	40 Ω Lines	2.4 mW + 2.4 mW	24 mW + 24 mW

0 dBu = 0.775 Vrms

*1 +4 dB (1.228 V) ( ) *2 & = & = & =

*3 = =

*4 = = =

*5 = = =

			/
		1:		XLR
	MIC/LINE 1/L 2/R
		2:
	STEREO OUT L R			INPUT	OUTPUT
		3:
	MIC/LINE 1/L 2/R*	: +		TRS
		:
	STEREO OUT L R*
		:
		: L
	PHONES	: R
		:
				TS
	LINE 3/4 5/6	:
		:
	* TS

6

MG06X/MG06

PANEL LAYOUT

q DC IN [12V] jack					q DC IN [12V]
w MIC/LINE] mono input jacks (channels 1/L, 2/R)					w [MIC/LINE] 1/L 2/R
e [LINE] stereo input jacks (channels 3/4, 5/6)					e [LINE] ( 3/4 5/6)
r [PAD] switches					r [PAD]
t [HPF] (High-Pass Filter) switches					t [HPF]( )
y [STEREO OUT] output jacks					y [STEREO OUT]
u [PHONES] output jack					u [PHONES]
i [GAIN] knobs					i [GAIN]
o Equalizer (EQ) knobs					o (EQ)
!0 [FX] switches (MG06X)					!0 [FX] (MG06X)
!1—[MONO/_STEREO] switch					!1—[MONO _STEREO]
!2 [PEAK] LED					!2 [PEAK] LED
!3 [LEVEL] knobs					!3 [LEVEL]
!4 [PHONES LEVEL] knob					!4 [PHONES LEVEL]
!5 [STEREO LEVEL] knob					!5 [STEREO LEVEL]
!6 [PHANTOM +48V] switch/LED					!6 [PHANTOM +48V] /LED
!7[			] (On/Standby) switch		!7			[ ]( / )
!8 [REVERB—/_DELAY] switch (MG06X)					!8 [REVERB— _DELAY] (MG06X)
!9 Effect select slide switch (MG06X)					!9 (MG06X)
@0 [FX RTN LEVEL] (effect return level) knob (MG06X)					@0[FX RTN LEVEL] ( ) (MG06X)
@1 Level meter					@1

7

MG06X/MG06

DIMENSIONS

149

This figure shows the MG06X.

MG06X

Unit: mm

62

2

56

201	202

30

28

CIRCUIT BOARD LAYOUT

(MG06X) PS6X PS-USB assembly

(MG06) PS6 PS-USBAss'y

(MG06X)	AM6X
(MG06)	AM6

This figure shows the MG06X.

MG06X

8

MG06X/MG06

DISASSEMBLY PROCEDURE

1.BOTTOM COVER

(Time required: About 2 minutes)

1-1. Remove the seven (7) screws marked [250]. The bottom cover can then be removed. (Fig. 1)

*When installing the bottom cover, make sure the hook is firmly inserted (6 place). (Fig. 1)

*Tighten the screws marked [250] in the order of a - e. (Fig. 1)

1.2

1-1. [250] 7

1

6

1

[250] a e

( 1)

2.SIDE COVER, SIDE PAD ASSEMBLY(L/R)

(Time required: About 3 minutes each)

2-1. Remove the bottom cover. (See procedure 1.) 2-2. SIDE COVER (L), SIDE PAD ASSEMBLY (L)

2-2-1. Remove the two (2) screws marked [220] and the screw marked [160A]. The side cover (L) can then be removed together with the side pad assembly (L). (Fig. 1)

*When installing the Side cover (L), tighten the screws in the order of f - h as shown in Fig. 1. (Fig. 1)

2-3. SIDE COVER (R), SIDE PAD ASSEMBLY (R)

2-3-1. Remove the two (2) screws marked [210] and the screw marked [160B]. The side cover (R) can then be removed together with the side pad assembly (R). (Fig. 1)

*When installing the Side cover (R), tighten the screws in the order of f - h as shown in Fig. 1.

2. Ass'y L,R3

2-1. 1

2-2. L Ass'y L

2-2-1. [220] 2 [160A] 1Ass'y L L1

L 1 f h 1

2-3. Ass'y R R

2-3-1. [210] 2 [160B] 1Ass'y R R1

R 1 f h 1

Rear view

This figure shows the MG06X.

MG06X

Top view

[160B]

[160A]

[160C][160C]

Bottom view

Side cover & Side pad assembly (L)

Side cover & Side pad assembly (R)

Ass'y

Ass'y

[250]

[250]

[250]

Hook

Bottom cover

[220]

[210]

[250]

Hook

[250]

Hook

[250]

Fig. 1 1

9

MG06X/MG06

3.PS-USB ASSEMBLY

(Time required: About 5 minutes)

3-1. Remove the bottom cover. (See procedure 1.)

3-2. Remove the side cover (L/R) and the side pad assembly (L/R). (See procedure 2.)

3-3. Remove the two (2) screws marked [160C]. The PS-USB assembly can then be pulled out from the AM6X circuit board (MG06X) or AM6 circuit board (MG06).

(Fig. 1, Fig. 2)

*When installing the PS-USB assembly, insert the two (2) projections of the PS-USB ASSEMBLY to the AM6X circuit board (MG06X) or AM6 circuit board (MG06). (Fig. 2)

	PS-USB assembly	Projections
	PS-USBAss'y
(MG06X)	AM6X
(MG06)	AM6

3.PS-USB Ass'y 5

3-1. 1

3-2. L,R Ass'y L,R

2

3-3. [160C] 2 AM6X (MG06X)AM6 (MG06) PS-USB Ass'y

1 2

PS-USB Ass'y 2

AM6X MG06X AM6 MG06

2

Projections

			AM6X (MG06X)	PS-USB assembly
	This figure shows the MG06X.		AM6 (MG06)	PS-USBAss'y
	MG06X
		Fig. 2 2
4.	AM6X Circuit Board (MG06X) /	4.	AM6X MG06X AM6
	AM6 Circuit Board (MG06)		MG06 12
	(Time required: About 12 minutes)	4-1.	1
4-1.	Remove the bottom cover. (See procedure 1.)	4-2.	Ass'y L,R
4-2. Remove the side cover and the side pad assembly (L/R).			2
	(See procedure 2.)	4-3.	MG06X :
4-3.	MG06X :		[270] VR 2 [280] VR 4
	Remove the two (2) KNOB VR SMALL WHITE/		[290] LEVEL6 [300] LEVEL1
	BLACKs marked [270], four (4) KNOB VR SMALL		3
	GREEN/BLACKs marked [280], six (6) KNOB		MG06 :
	LEVEL WHITE/BLACKs marked [290] and the		[270] VR 2 [280] VR 4
	KNOB LEVEL RED/BLACKs marked [300]. (Fig. 3)		[290] LEVEL5 [300] LEVEL1
	MG06 :		3
	Remove the two (2) KNOB VR SMALL WHITE/	4-4.	[160C] 2 [150] 8 [A]
	BLACKs marked [270], four (4) KNOB VR SMALL		7 3
	GREEN/BLACKs marked [280], five (5) KNOB
	LEVEL WHITE/BLACKs marked [290] and the
	KNOB LEVEL RED/BLACKs marked [300]. (Fig. 3)
4-4.	Remove the two (2) screws marked [160C], eight (8)
	screws marked [150] and seven (7) each hexagonal
	nuts and washers marked [A]. (Fig. 3)

10

MG06X/MG06

Top view
	[150]	[150]
[A]
[270]
[280]
[290]
MG06X: x6
MG06:	x5
[300]

Rear view

[160C]

[160C]

This figure shows the MG06X.

MG06X

[270]: KNOB VR SMALL WHITE/BLACK VR

[280]: KNOB VR SMALL GREEN/BLACK VR

[290]: KNOB LEVEL WHITE/BLACK LEVEL

[300]: KNOB LEVEL RED/BLACK LEVEL

Fig. 3 3

4-5.	Reverse the unit and remove the two (2) screws marked	4-5.	[30] 2 PS-USB
	[30]. The AM6X circuit board (MG06X) or AM6 circuit		Ass'y AM6X MG06X AM6
	board (MG06) can then be removed together with the		MG06 4
	PS-USB ASSEMBLY. (Fig. 4)	4-6.	AM6X MG06X AM6 MG06
4-6.	Separate the PS-USB ASSEMBLY from the AM6X		PS-USB Ass'y
	circuit board (MG06X) or AM6 circuit board (MG06).

PS-USB assembly

PS-USBAss'y

[30]

(MG06X) AM6X

(MG06) AM6

This figure shows the MG06X.

MG06X

Fig. 4 4

11

MG06X/MG06

4-7. MG06X :

Remove the four (4) knob joint HPF BLACKs marked [40], eight (8) push button HPF D-GRAY/WHITEs 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] from the AM6X circuit board. (Fig. 5)

MG06 :

Remove the four (4) knob joint HPF BLACKs marked [40], five (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.

This figure shows the MG06X.	[60]
MG06X
[50]	[40]
MG06X: x8
MG06: x5

AM6X (MG06X)

AM6 (MG06)

PS-USB assembly

PS-USBAss'y

4-7. MG06X :

AM6X [40] HPF4 [50]HPF8 [60] HPF RED1

[70] PFL1 [80]1 5

MG06 :

AM6 [40] HPF4 [50]HPF5 [60] HPF RED1

[70]PFL1 5

[40] HPF [50] HPF [60]

HPF RED [70] PFL [80]

AM6X AM6X MG06X

AM6 MG06

AM6X MG06X AM6 MG06

[40] HPF [50]

HPF [60] HPF RED [70] PFL

[80]AM6X

[40]: KNOB JOINT HPF BLACK HPF

[70]

[50]: PUSH BUTTON HPF D-GRAY/WHITE HPF

[60]: PUSH BUTTON HPF RED HPF RED

[70]: PUSH BUTTON PFL MILKY/D-GRAY PFL

[80]: KNOB SLIDE SWITCH BLUE

[80]

MG06X only

Fig. 5 5

12

MG06X/MG06

LSI PIN DESCRIPTIONLSI

PCM1780DBQR (X7356A01) DAC (Digital to Analog Converter)									PS6X: IC905
PIN	NAME	I/O	FUNCTION	PIN	NAME	I/O		FUNCTION
NO.				NO.
1	ZEROL/NA	O	Zero flag output for L-channel / No assign	9	NC	–		No connection
2	MS	I	Mode control select input	10	NC	–		No connection
3	MC	I	Mode control clock input	11	VCC	–		Power supply, 5-V
4	MD	I	Mode control data input	12	AGND	–		Ground
5	SCK	I	System clock input	13	VCOM	–		Common voltage decoupling
6	DATA	I	Audio data digital input	14	VOUTR	O		Analog output for R-channel
7	BCK	I	Audio data bit clock input	15	VOUTL	O		Analog output for L-channel
8	LRCK	I	Audio data left and right clock input	16	ZEROR/ZEROA	O		Zero flag output for R-channel / Zero flag output for L- and R-channels
PCM1803DBR (X7357A00) ADC (Analog to Digital Converter)
PCM1803ADBR (X7357B00) ADC (Analog to Digital Converter)									PS6X: IC904
PIN	NAME	I/O	FUNCTION	PIN	NAME	I/O		FUNCTION
NO.				NO.
1	VINL	I	Analog input (L ch)	11	BCK	I/O		Audio data bit clock input/output
2	VINR	I	Analog input (R ch)	12	DOUT	O		Audio data digital output
3	VREF1	-	Reference-voltage-1 decoupling capacitor	13	DGND	-		Digital ground
4	VREF2	-	Reference-voltage-2 decoupling capacitor	14	VDD	-		Digital power supply +3.3V
5	VCC	-	Analog power supply +5V	15	SCKI	I		System clock input
6	AGND	-	Analog ground	16	OSR	I		Oversampling ratio select input
7	PDWN	I	Power-down control, active-low	17	FMT0	I		Audio data format select input 0
8	BYPAS	I	HPF bypass control	18	FMT1	I		Audio data format select input 1
9	TEST	I	Test, must be connected to DGND	19	MODE0	I		Mode select input 0
10	LRCK	I/O	Audio data latch enable input/output	20	MODE1	I		Mode select input 1

	BU6945K-E2 (X9788A00) SSPO							PS6X: IC902
	PIN	NAME	I/O	FUNCTION	PIN	NAME	I/O	FUNCTION
	NO.				NO.
	1	TYPE3	Ish*	Effect Type Select	17	RTEST2	Ish*	Test (for Supplier)
	2	TYPE2	Ish*	Effect Type Select	18	RTEST1	Ish*	Test (for Supplier)
	3	TYPE1	Ish*	Effect Type Select	19	RTEST0	Ish*	Test (for Supplier)
	4	GND	–	Ground	20	GND	–	Ground
	5	IOVDD	–	I/O	21	IOVDD	–	I/O Power Supply
	6	TYPE0	Ish*	Power Supply	22	PRST	Ish+*	Parameter Fixation Mode Setting (PRST: Hi)
	7	EFSWN	Ish+*	Effect Type Select	23	SDO	O	Audio Serial Data Output
	8	LED	O	Effect Switch (H û L detect)	24	SDI	I	Audio Serial Data Input (L ch), Parameter Input (R ch)
	9	FOOT	Ish+*	Effect ON/OFF Status (ON: Hi/OFF: Lo)	25	WCLK	O	Word Clock Output
	10	MUTE	O	Effect Switch (L û H detect)	26	BCLK	O	Bit Clock Output
	11	THRU	Ish-*	Mute (MUTE ON: Hi/MUTE OFF: Lo)	27	SCLK	O	System Clock Output
	12	GND	–	Effect Through Setting (THRU: Hi)	28	GND	–	Ground
	13	YTEST	Ish*	Ground Test (for Yamaha)	29	XI	I	Crystal Oscillator Input
	14	TVAR	Ish-*	Effect Type Variation Select (TVAR: Hi)	30	XO	O	Crystal Oscillator Output
	15	DVDD	–	Logic Core Power Supply Input	31	ICN	Ish*	Reset
	16	REG18	O	Built -in Regulator Output	32	CKDIV	Ish+*	Input Clock Select (16.93MHz Input: Lo/33.87 MHz Input: Hi)

*Ish: Schmitt Trigger Input

Ish+: Schmitt Trigger Input with pull-up Ish-: Schmitt Trigger Input with pull down

13

MG06X/MG06

CIRCUIT BOARDS

AM6X (MG06X) / AM6 (MG06) Circuit Board (YF133C0)...................................................	14/15
PS6X (MG06X) / PS6 (MG06) Circuit Board (YF134D0) ........................................................	16

Note: See parts list for details of circuit board component parts.

:
AM6X (MG06X) / AM6 (MG06) Circuit Board
	Component side

14	2NA-ZG18490	1