Mackie 1642-VLZ PRO User manual

1642-VLZ PRO
Compact mixer
SERVICE MANUAL
1999,2000 MACKIEDESIGNS,INC.
820-220-00
Page 3 is interactive

2
SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY
EXPERIENCED REPAIR TECHNICIANS ONLY

3
CONTENTS
Introduction.....................................................................3
Blockdiagram..................................................................4
Specifications...................................................................6
Safety test........................................................................7
Parts...................................................................................8
Fold-out Sections
Schematics and PCB layouts
Main board.................................................................247-1
Jack field board.........................................................248-1
Power supply board...................................................249-1
Mic input board.........................................................257-1
INTRODUCTION
This manual contains basic service information. It is essential that you have a copy of the
user’s manual as this contains the complete operating instructions.
SERVICE TECHNICAL ASSISTANCE
MackieDesigns, ServiceTechnicalAssistance, isavailable 8AM- 5PMPST, Mondaythrough
Friday for Authorized Mackie Service Centers, at 1-800-258-6883. Feel free to call with any
questions and speak with a carefully-calibrated technician. If one is not available, leave
a detailed message and a qualified Mackoid will return your call asap.
DISCLAIMER
The information contained in this manual is proprietary to Mackie Designs, Inc. The entire
manual is protected under copyright and may not be reproduced by any means without
express written permission from Mackie Designs, Inc.
SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY
EXPERIENCED REPAIR TECHNICIANS ONLY
Click on any item to open that page
ALL BOARDS

4
Block Diagram
MAIN L
SUB 3
MAIN R
SUB 2
SUB 1
SUB 4
AUX 1
AUX 2
AUX 3
AUX 4
75Hz
HPF
MID HI
80 100 8K 12K
LO L
R
1
2
3
4
SIP L
SIP R
PFL
PHANTOM POWER
(GLOBAL SWITCH)
TRIM
MIC IN
LINE IN
DIRECT OUT
(CH'S 1 8 ONLY)
INSERT
LOW CUT
–20 (FLICKER)
SOLO (GLOW) OL (FLICKER) MUTE (GLOW)
EQ
GAIN FREQ
FADER
MUTE PAN ASSIGN
PRE
AUX 1
AUX 2
AUX 3
AUX 4
MONO INPUT CHANNEL
(1 OF 8)
AUX RETURN 1
AUX RETURN 2
AUX RETURN 4
AUX RETURN 3
EFX TO
MON
LEVEL
LEVEL
LEVEL
LEVEL ASSIGN TO
C-R/PHNS
ONLY
MAIN/SUBS
1-2/3-4
EFX TO
MON
SOLO
TO SOLO LED
SIP L
SIP R
PFL
SOLO
PRE
AUX 1
AUX 2
AUX 3
AUX 4
L
R
1
2
3
4
SIP L
SIP R
PFL
ASSIGN
SOLO
TO SOLO LED
STEREO INPUT CHANNEL
(1 OF 4)
LINE IN L
LINE IN R
STEREO TRIM
(Chs 13/14 & 15/16 only)
MIC IN
(Chs 9/10 & 11/12 only)
FADER
MUTE
PAN
4-BAND STEREO EQ
MID HI
80 800 12K
LO
MID HI
80 800
MID
3K
MID
3K 12K
LO
–20 (FLICKER)
SOLO (GLOW) OL (FLICKER)
MUTE (GLOW)
MIC TRIM
75Hz
HPF
LOW CUT
MACKIE DESIGNS
1642-VLZ PRO
BLOCK DIAGRAM
(#70699CJM/DF)
2
3
1
2
3
1
L
R
L
R
L
R
L
R

5
SIP L
SIP R
PFL
LOGIC
CR/PHN L
CR/PHN R
SOLO
RELAY
ASSIGN
TO MIX
MAIN MIX
MAIN INSERT
MAIN MIX
FADER
MAIN MIX MONO OUT
1
TAPE OUT
MAIN MIX RIGHT OUT
METERS
(0VU = 0dBu)
TAPE IN
L
RTAPE LEVEL
C-R/
PHONES
SOURCE
MAIN
TAPE
12
RUDE SOLO LED
C-R/PHONES MIX
C-R LEVEL
CONTROL ROOM OUT
L
R
PHONES OUT A
SIP/PFL
SOLO LEVEL
SOLO MIX
SUB 1 MIX
FADER
FADER
ASSIGN TO MAIN MIX
L
R
SUB 1 OUT
(SUBMIX 3/7 IDENTICAL)
SUB 2 MIX
ASSIGN TO MAIN MIX
L
R
SUB 2 OUT
(SUBMIX 4/8 IDENTICAL)
AUX MIX
LEVEL AUX SEND 1
(AUX SEND 2 IDENTICAL)
AUX SEND 3
BUS TO WOODINVILLE
(AUX SEND 4 IDENTICAL)
PHONES OUT B
SOLO
34
(FROM SUB 3 OUT)
(FROM SUB 4 OUT)
22
10
7
4
2
0
2
4
7
10
20
30
LEVEL SET
(PFL) LED
MONO LEVEL
SUB 5 OUT
SUB 6 OUT
PHONES
LEVEL
L
R
2
3
1
2
3
MAIN MIX LEFT OUT
+4/–10dB PAD
(XLR only)
1/4" BAL
XLR BAL
XLR BAL
1/4" BAL
MACKIE
EXPRESS

6
Specifications
Main Mix Noise
(20Hz–20kHzbandwidth,
1
/ 4 "MainOut,channel
Trims @ unity gain, channel EQs flat, all channels
assigned to Main Mix, odd channels panned left,
evenchannels panned right)
Main Mix fader unity, channel faders down:
–86.5dBu (90dB Signal to Noise Ratio, ref +4dBu)
MainMix fader @ unity, channel faders@unity:
–84.0dBu
Total Harmonic Distortion (THD)
1kHz@+14dBu: 20Hz–20kHz
Mic in to Main out: below 0.0007%
Attenuation (Crosstalk)
(1kHz relative to 0dBu, 20Hz–20kHz bandwidth,
Line in,
1
/ 4 "Main Out, Trim @ unity)
ChannelMuteswitchengaged: –84dBu
ChannelGainknobdown: –84dBu
Frequency Response
Mic input to any output
20Hz to 60kHz: +0dB/–1dB
20Hz to 100kHz: +0dB/–3dB
Equivalent Input Noise (EIN)
Mic in to Insert Send out, max gain
150 Ωtermination: –129.5dBmunweighted
Common Mode Rejection (CMR)
Mic in to Insert Send out, max gain
1kHz: better than 90dB
Maximum Levels
Mic in: +22dBu
All other inputs: +22dBu
Main Mix
1
/ 4 "TRSand XLR outputs: +28dBu
All other outputs: +22dBu
Impedances
Mic in: 1.3kΩ
Channel Insert return: 2.5 kΩ
All other inputs: 10 kΩor greater
Tapeout: 1.1kΩ
All other outputs: 120 Ω
3 band EQ (Channels 1 - 8)
High Shelving: ±15db@ 12kHz
MidPeaking: ±15dB, sweep 100Hz–8kHz
Low Shelving: ±15db@80Hz
Low Cut Filter: 18dB/octave, –3dB @ 75Hz
4-band EQ (Channels 9 - 16)
High Shelving: ±15db@ 12kHz
Hi Mid Shelving: ±15dB, 3kHz
Lo Mid Shelving: ±15dB, 800Hz
Low Shelving: ±15db@80Hz
Low Cut Filter (Ch9-12): 18dB/octave, –3dB @ 75Hz
Power Consumption
120VA.C., 50/60Hz, 40 watts
Fuse Ratings
120V: 1A Slo Blo, 5 x 20mm
220–240V: 0.5A Slo Blo, 5 x 20mm
Weight
18.2 lbs. (8.3kg)
Rack mounting
Optional rack ears are available which will allow the
1642-VLZ PRO to be mounted in a standard 19" rack.
Allow ten rack spaces for the unit, and allow two
empty rack spaces on top for room to plug things in.

7
You must perform the following leakage test before returning the unit to your customer.
Take every safety precaution to protect yourself while doing this test.
1. Make a small loading RC circuit as shown in the diagram below, and connect the AC
volt meter between the AC power source ground and any exposed metal on the unit
under test.
2. Connect the unit under test to an AC power source using a ground-lift adaptor, leaving
the unit’s safety ground floating. Turn the unit on.
3. The meter reading should be less than 750mVAC (note: this is equivalent to 0.5mA of
leakagecurrent).
4. Flip the plug over in the receptical so the hot and neutral are swapped.
Verify that the reading is still less then 750mVAC.
5. If either reading is greater than 750mVAC, then you must investigate and repair the unit
before returning it to your customer.
Safety test

8
Quick Parts
1
MUTE
LINE IN
INSERT
X
D
R
M
I
C
P
R
E
MIC
1
BAL
UN-
BAL
REC
1
TRIM
1
LOW CUT
75 Hz
18dB/OCT
+15dB-45dB
U
U
O O
+15
O O
U
+15
U
O O
+15
AUX
1
PRE
U
+15
-
15
FREQ
800
2k200
8k100
MID
PAN
LR
U
+15-15
80Hz
LOW
060
2
3
U
+15-15
EQ
U
O O
+15
4
12k
HI
dB
30
20
10
O O
40
50
5
5
U
60
10
SOLO
1
- 2
3
- 4
L/R
OL
-
20
M
I
C
G
A
I
N
-
1
0
d
B
V
Knobs
Gray=760-048-01
Blue/Gray=760-048-03
Dark/Gray=760-048-04
XLR = 400-223-00
1/4" jack = 400-214-00
Pot = 130-003-02
Switch = 500-037-00, Button = 760-107-00
Pot = 130-064-02
Pot = 130-002-02
Pot = 130-002-02
Pot = 130-022-02
Pot = 130-065-02
Pot = 130-074-02
Switch = 500-037-00, Button = 760-108-00
LED (RED) = 304-027-02
LED (GRN) = 304-024-02
Switch = 500-036-00, Button = 760-108-00
Switch = 500-037-00, Button = 760-107-00
Fader = 130-031-00, Knob = 760-058-01
Switch = 500-037-00, Button = 760-107-00
Channels 1-8 have
the same parts

9
13
LEFT
LEFT
RIGHT
LEFT
RIGHT
MONOMONO
14
RIGHT
BAL/
UNBAL BAL/ UNBAL
15
LEFT
MONO
16
RIGHT
TAPE
IN TAPE OUT
BAL
UN-
BAL
LINE IN 11 LINE IN LINE IN
LINE IN 12
X
D
R
M
I
C
P
R
E
MIC 11-12
L
R
2
3
TRIM
15
16
U
O O
+15
U
O
U
+15
U
O O
+15
AUX
PRE
U
+20-20
1
TRIM
13
14
O O
U
+15
AUX
U
+20-20
2
3
4
1
4
U
+15-15
EQ
U
O O
+15
U
O O
+15
U
O O
+15
PRE
U
+15-15
EQ
12k
HI
12k
HI
O O
+15
O
PAN PAN
HI
MID
3K
LOW
MID
800Hz
80Hz
LOW
LOW
MID
800Hz
80Hz
LOW
LR
U
+15-15
LR
+15-15 U
+15-15
U
+15-15 U
+15-15
LOW
MID
800Hz
U
+15-15 U
+15-15
HI
MID
3K
TRACK
8
EFX
A
EFX
B
11-12
MUTE
13-14
MUTE
15-16
MUTE
U
TRIM
11
12
LOW CUT
75 Hz
18dB/OCT
U
O O
+15
O O
U
+15
U
O O
+15
AUX
1
PRE
U
+15-15
HI
MID
3K
PAN
LR
U
+15-15
80Hz
LOW
060
2
3
U
+15-15
EQ
U
O O
+15
4
12k
HI
dB
30
20
10
O O
40
50
5
5
U
60
10
SOLO
1
- 2
3
- 4
L/R
OL
-
20
M
I
C
G
A
I
N
dB
30
20
10
O O
40
50
5
5
U
60
10
SOLO
1
- 2
3
- 4
L/R
OL
-
20
dB
30
20
10
O O
40
50
5
5
U
60
10
SOLO
1
- 2
3
- 4
L/R
OL
-
20
BAL
UN-
BAL
LINE IN 9
LINE IN 10
X
D
R
M
I
C
P
R
E
MIC 9-10
L
R
MONO
LOW
MID
800Hz
U
+15-15
9-10
MUTE
TRACK
7
TRIM
9
10
LOW CUT
75 Hz
18dB/OCT
U
O O
+15
O O
U
+15
U
O O
+15
AUX
1
PRE
U
+15-15
HI
MID
3K
PAN
LR
U
+15-15
80Hz
LOW
060
2
3
U
+15-15
EQ
U
O O
+15
4
12k
HI
dB
30
20
10
O O
40
50
5
5
U
60
10
SOLO
1
- 2
3
- 4
L/R
OL
-
20
M
I
C
G
A
I
N
XLR = 400-223-00
1/4" jack = 400-214-00
Quad RCA jack = 400-022-00
Pot = 130-003-02
Switch = 500-037-00, Button = 760-107-00
Pot = 130-061-02
Knobs
Gray=760-048-01
Blue/Gray=760-048-03
Dark/Gray=760-048-04
Pot = 130-065-02
Pot = 130-061-02
Pot = 130-074-02
Switch = 500-036-00, Button = 760-108-00
LED (RED) = 304-027-02
LED (GRN) = 304-024-02
Switch = 500-036-00, Button = 760-108-00
Switch = 500-037-00, Button = 760-107-00
Fader, dual = 130-032-00, Knob = 760-058-01
Switch = 500-037-00, Button = 760-107-00

10
PHONES
A
B
LAMP
12V
0.5A
U
OO
+20
OO
+20
U
OO
+15
OO
+15
STEREO AUX RETURN
EFFECTS TO MONITORS
TO AUX
SEND 2
TO AUX
SEND 1
1
2
1
2
3
4
C-R / PHNS
ONLY RETURNS
SOLO
ASSIGN OPTIONS
U
OO
+20
U
OO
+20
U
OO
+10
U
OO
+10
AUX SEND
1
2
PWR
PHAN
SOLO
SOLO
1
2
SUBS 1 – 2
SUBS 3
– 4
MAIN MIX
CRSOURCE
TAPE
OO
MAX
SOLO
RUDE SOLO LIGHT
1
52 63 74 8
LEFT
RIGHT
LEFT
RIGHT
LEFT
RIGHT
LEFT
LEVEL
SET
MODE
(AFL)
LEVEL SET
NORMAL (PFL)
RIGHT
dB
30
20
10
OO
40
50
5
5
U
60
10
dB
30
20
10
OO
40
50
5
5
U
60
10
MAIN
MIX
CONTROL ROOM
MAX
OO
MAX
OO
PHONES
U
OO
+20
TAPE IN
TAPE TO
MAIN MIX
28
10
7
4
2
0
2
4
7
10
20
30
UU
Knobs
Gray=760-048-01
Blue/Gray=760-048-03
Dark/Gray=760-048-04 LED
Red=304-027-02
Green=304-029-02
Yellow=304-028-02
BNC assembly
080-160-00
1/4" jack = 400-214-00
Switch = 500-037-00
Button = 760-107-00
Switch = 500-036-00
Button = 760-107-00
LED, Green=304-029-02
Pot = 130-003-02Pot = 130-002-02
Pot = 130-061-02
Fader, dual= 130-032-00
Knob = 760-058-01
Fader, mono = 130-031-00
Knob = 760-058-01
Switch = 500-037-00
Button = 760-107-00
LED Green=304-029-02
Switch = 500-037-00
Button = 760-107-00
Switch = 500-036-00
Button = 760-107-00
Pot = 130-061-02
LED (green flasher) =304-018-00