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Popular Yamaha MR1642 Manual Pages
Service Manual - Page 1
... ( )
SPECIFICATIONS (4e*l±a)
2
PANEL LAYOUT (/
-17 r, )
6
BLOCK & LEVEL DIAGRAM ( 7'.
&
7
A)
8
CIRCUIT BOARD LAYOUT (3_::
-(7 r7 F )
10
DIMENSIONS (7k:A )
1 1
IC BLOCK DIAGRAM (ic "ln LI)
11
CIRCUIT BOARDS ( v - h 4* )
12
DISASSEMBLY PROCEDURE(-5-1W*IIIR)
24
PARTS LIST
YAMAHA CORP.
HAMAMATSU, JAPAN
3.1K-613 0 Printed in Japan '89.8 MIXING/NM CONSOLES
d=ft IMrmaM...
Service Manual - Page 2
... by grounding yourself to the ground buss in specification are subject to change without notice or obligation to the industry, and more specifically Yamaha Products, are , therefore, inevitable and changes in the unit (heavy
gauge black wires connect to exist, please contact the distributor's
Service Division. IMPORTANT: Turn the unit OFF during disassembly and parts replacement.
Service Manual - Page 3
... W MR1242 : 70 W MR1642 : 70 W
Console Dimensions (W x H x D) MR842 : 555 x 182 x 600 mm (21-7/8" x 7-3/16' x 23-5/8') MR1242 : 695 x 182 x 600 mm (27-3/8' x 7-3/16" x 23-5/8") MR1642 : 835 x 182 x 600 mm (32-7/8' x 7-3/16' x 23-5/8")
Net Weight MR842 : 15 Kg (33 lbs 1 oz) MR1242 : 18 Kg (39 lbs 11 oz) MR1642: 21 Kg (46 lbs 5 oz)
* 0dB = 0.775 Vrms. Specifications and appearance subject...
Service Manual - Page 5
...
+20dB(7.75V)
Connector In Mixer
XLR-3-32 type RCA Pin Jack... MR1242=12 - 1•> )1/, MR1642=16 -t•i4-11/Tto
MR842/MR1242/MR1642
4
5
TALK BACK IN XLR
-(...17:// >
• 0 dB=0. 775V RMS • .4CH INPUTt
MR842=8CH, MRI284= I2CH, MRI642= scw-ct
Output Terminals GROUP OUT (1 4)
STEREO OUT(L,R)
AUX SEND (1 3) INSERT OUT CH(1x)
GROUP(1 4) MONITOR...
Service Manual - Page 6
MR842/MR1242/MR1642
"PANEL LAYOUT (i
Service Manual - Page 7
...2
0
Iff
4
%
AUX I
*3
I I AUX 2
,er
AUX 3
°0r':•C°UE
CH INPUT (CH2-8. 12.16)
SAME AS CHI
Pe
AUX 3
SU IN
0,0
'Ag4
CUE
j,
0
11 GROUP I INSERT I/0(-6)
LA
GROUP I
/ PAN
METER
... I VOLUME NOMINAL POSITION.-10(18 POINT
MR842/MR1242/MR1642
8
9 STEREO AUX
STEREO SUB IN(+4)
AUX SENO 3 to MONITOR -\
+40
GROUP.STEREO.AU)( SENO.MONITOR(+4) +10
STEREO /
% -LI
▪0 C...
Service Manual - Page 8
....
C2 circuit board ®P circuit board - Ht,
©A circuit board - J1 circuit board - J2 circut board
MR842 MR1242 MR1642
P circuit board Ch, 1 -Ch. 8 Ch, 1-Ch. 12 Ch, 1-Ch. 12
P1 circuit board X
X
Ch.13-Ch.16
10
R842/MR1242/MR1642 P1 circuit board ®J circuit board - Al circuit board ®Cl circuit board -
Service Manual - Page 10
...Al circuit board from A are Connector assembly Ti and T2.
(A
h
S( _rC n K17 ,
A
- MR842/MR1242/MR1642
MR842/MR1242/MR1642
MCIRCUIT BOARDS
F40
•MR-A & MR-Al Circuit Boards
GROUP. 1 -8
[CUEI
C
SW106
PAN PAN
3-4
TAPE...181;F 35V (FL259330)
MR842 MR1242 MR1642
A circuit board Ch, 1-Ch. 7 Ch, 1 -Ch. 11 Ch, 1-Ch. 15
Al circuit board Ch. 8 Ch.12 Ch.16
" The Al circuit board is ...
Service Manual - Page 11
... 301:
IC 302-306: IC 801 (851): 2. C -
Cit IC
'If
1 1, C58_I LIE
-4 I0527
0541 1 C5w1 s
I
I VA/ 44 J. 4.
1,A1f 0',":
- •
I I
O•
C320
3•".
' IP-
MR842/MR1242/MR1642
MR842/M R1242/M R1642
•MR -C1 & MR-C:2 Circuit Boards
CUE PAN
AUX RTN1,2
34 11-2 I
/ZS 1
W13W12 I I
C
L
12
1 0,Lir 0517 1CS73 •
3 r
3CW7 -1'10
Components...
Service Manual - Page 16
...P1 circuit board
MR842
Ch, 1-Ch. 8
X
MR1242
Ch, 1-Ch. 12
X
MR1642
Ch, 1 -Ch. 12
Ch.13-Ch.16
• The P1 circuit board is only the Connector
assembly.
(P > -I TIP 1...8226;MR-Q Circuit Board
MONITOR OUT • +4dB
L
R
Notes) • Circuit Board: MR-P (NX806800) • Circuit Board: MR-P1 (NX807670)
1. h tl**0 191.:
Ass'y oDa-i.b MR842/MR1242/MR1642
•MR-O Circuit ...
Service Manual - Page 17
...-A (MR-Al) circuit board can be removed. (Fig.3)
2. MR-A (MR-A 1 )
h 0M- F L
(Fig.3)
MR -A
Volume knob
Slide knob
I
I II
I I I II
1
- MDISASSEMBLY PROCEDURE (53.1*jip)
MR842/MR1242/MR1642
1. Removal of Bottom Board • Remove the 14 bind tapping screws OA
(3x8), and bind head screws 8 (4x8), the Bottom board can be removed (Fig...
Service Manual - Page 18
... be removed. (Fig.4) 5. MR-D- 1.0)51•L '
• TI- t•M-Ltt. (Fig.2)
• Ittfgt'ALtto (1xI,-.)1fD
•,
V3' E/71., -;0 (3 x 8) 2* .M-L,
MR-C1 (C 2,F)
t.ALtt. (Fig.4)
4. MR842/MR1242/MR1642
3.
Service Manual - Page 19
...
• att .M-
L
'Z
.
_1
'2, 020002 q n -0 0 0 04 (0, e II 7( =
Fig. 7
,_
Rear Pad
(.1•0:0.D.!QQ.QQ- Rear Pad ( 7,:' 7 F.) Fig. 6
(U7, •y
26 MR842/MR1242/MR1642
7. l - a)M•
• TA4Rt•A Ltto ( 1 *VIP,)
• MR-B-1-
L
xi_ )
• i" :/1 ,1\*:';8 (4 x 8) 4 *t•AL, 5'fL-
(Fig. 5 )
Rear Panel ( u 7,:4)1,)
Fig. 5
Power Transtormer MR...
Service Manual - Page 20
... board can be removed. (Fig.8)
11.
MR-J
= Hexagonal Nut (All t
)
Fig. 8
Note)
MR842 MR1242 MR1642
P circuit board Ch, 1 -Ch. 8 Ch, 1-Ch. 12 Ch, 1-Ch. 12
P1 circuit board X X
Ch.13-Ch.16
MR842/MR1242/MR1642
27 MR842/MR1242/MR1642
11. Removal of MR-L Circuit Boards • Remove the bottom board. (see procedure 1) • Remove...
Service Manual - Page 21
... (n
If) N Nit) ft)
• 00
d
MR - P1
WI 0- ocnocnocr 3 u) (2
N N M M It Tr st
INPUT 16
BL
70mm RE
3
WH
02
T4
MR -A (CH. 1 ) -
Ti
W2 --• • -41
I9P 60mm
TI
T4
MR -A
...MR - RE WI I WI2 I WI3
I WI2 WI3
115
I7P
MR - O
I -
B 2/ 2
eo • 3
MR842/MR1242/MR1642
A
B
C
D
E
F
G
H
1
MR842/M R1242/M R1642
M
0 A (CH.15)
W2 W2 BE
TI I9P
60mm
W2
...
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