Mackie 1202-VLZ Mic/Line Mixer Service Manual
This document provides service information for the Mackie 1202-VLZ Mic/Line Mixer.
Contents
- Quick Parts
- Block Diagram
- Schematics
- PCB Layout
Quick Parts
The following is a list of common replacement parts for the Mackie 1202-VLZ mixer:
| Part Name | Part Number |
| All 14 Jacks | 400-214-00 |
| XLR Input | 400-223-00 |
| XLR Output Pad Button | 760-003-00 |
| XLR Output Pad Switch | 500-012-00 |
| XLR Output | 400-041-00 |
| RCA Jacks | 400-022-00 |
| Phantom Power Switch | 500-016-00 |
| Main Power Switch | 500-013-00 |
| IEC Receptacle | 400-009-00 |
| Lo-Cut Button | 760-003-00 |
| Lo-Cut Extender | 760-015-00 |
| Trim Knob | 760-081-00 |
| Trim 5K ZY | 130-020-02 |
| Aux Send 1 Knob | 760-048-02 |
| Aux Send 1 Pot | 130-061-02 |
| Aux Send 2 Knob | 760-048-02 |
| Aux Send 2 Pot | 130-003-02 |
| EQ Section Knob | 760-048-03 |
| EQ Section Pot | 130-002-02 |
| Pan Knob | 760-048-04 |
| Pan Pot | 130-065-02 |
| Mute Button | 760-011-00 |
| Mute Switch | 500-012-00 |
| Solo Button | 760-107-00 |
| Solo Switch | 500-037-00 |
| Ch 1-4 Gain Knob | 760-023-00 |
| Ch 1-4 Armrest Pot | 551-014-00 |
| Ch 1-4 Gain Pot | 130-003-02 |
| Ch 5-12 EQ Knob | 760-048-03 |
| Ch 5-12 EQ Pot | 130-060-02 |
| Ch 5-12 Gain Knob | 760-023-00 |
| Ch 5-12 Gain Pot | 130-061-02 |
| Cr/Phones Knob | 760-023-00 |
| Cr/Phones Pot | 130-061-02 |
| Aux 1 Master Knob | 760-048-02 |
| Aux 1 Master Pot | 130-003-02 |
| Aux Return 1 Knob | 760-048-01 |
| Aux Return 1 Pot | 130-061-02 |
| Aux Return 2 Knob | 760-048-01 |
| Aux Return 2 Pot | 130-065-01 |
| Aux Matrix Button | 760-048-01 |
| Aux Matrix Switch | 500-037-00 |
| Matrix Button | 760-003-00 |
| Matrix Switch | 500-037-00 |
| Rude Solo LED | 304-002-00 |
| Main Mix Gain Knob | 760-023-00 |
| Main Mix Gain Pot | 130-062-02 |
| Assign to Main Button | 760-013-00 |
| Assign to Main Switch | 500-012-00 |
| End Caps Left | 760-034-20 |
| End Caps Right | 760-034-10 |
| Small LEDs Green | 304-004-00 |
| Small LEDs Yellow | 304-003-00 |
| Small LEDs Red | 304-001-00 |
| Bumpon | 750-001-00 |
| Star Ground Screw | 700-031-01 |
| Bottom Side Screw | 701-005-00 |
| RCA Screw | 705-001-00 |
| PCB Assy | 055-217-00 |
| Top SRF Screws | 700-011-00 |
| Star Ground Nut | 705-001-00 |
| Bottom Screws | 701-005-00 |
| Chassis Top | 550-150-10 |
| Side Screws | 700-006-00 |
| All XLR Screws | 701-005-00 |
| End Cap Screws | 700-010-00 |
| 120V Xformer | 080-009-00 |
| PCB Assy | 055-217-00 |
| Owner's Manual | 820-028-01 |
Signal Flow Diagram
The signal flow diagram illustrates the path of audio signals through the Mackie MS1202-VLZ mixer. It details the mono and stereo channels, auxiliary sends and returns, and the master section.
Mono Channel (1 of 4): Features include Mic In, Line In, Insert, Pan, Gain, Lo-Cut, 3-Band EQ (Lo, Mid, Hi), Mute/Alt, Aux Sends (Pre/Post), Solo (PFL), and Main Mix assignment.
Stereo Channel (1 of 4): Includes Line In L/R, Pan, Gain, Lo-Cut, 3-Band EQ (Lo, Mid, Hi), Mute/Alt, Aux Sends (Pre/Post), Solo (PFL), and Main Mix assignment.
Auxiliary Sends and Returns: The mixer provides Aux 1 and Aux 2 sends, with controls for level and pre/post switching. Aux Returns 1 and 2 are also present for integrating external effects.
Master Section: This section includes Main Mix Level, Alt Mix, Cr/Phones Mix, Main Outs (L/R), Bal Outs (L/R), Tape Out (L/R), and Phones Out. It also features controls for Source selection and Rude Solo LED.
Metering and Power Supply: The bargraph meters indicate signal levels for Left and Right channels, with CLIP (+20), +16V, +10 YEL, +7 GRN, +4 GRN, -2 GRN, -4 GRN, -7 GRN, -10 GRN, -20 GRN, -30 GRN indicators. The power supply section utilizes LM317T and LM337T voltage regulators.
Schematics and PCB Layouts
Detailed schematics for the Mono Channel, Stereo Channel, Aux Send/Return, and Master Section are provided, along with PCB layouts for the Upper and Lower boards. These diagrams illustrate the electronic components and their interconnections.
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