Roland BOSS KATANA-50 Mk II User Manual

SERVICE NOTES
Issued by RJA
Copyright © 2019 Roland Corporation
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of Roland Corporation.
CC-KWS17057241E0
Oct. 2019 KTN-50_2
Table of Contents
Cautionary Notes ..............................................................2
Specifications .....................................................................3
Location of Control (Top) ................................................4
Location of Control Parts List (Top)...............................4
Location of Control (Rear) ...............................................5
Location of Control Parts List (Rear)..............................5
Exploded View (Cabinet).................................................6
Exploded View Parts List (Cabinet) ...............................7
Disassembly Procedure....................................................7
Note on Disassembly........................................................7
Important Notes on Assembly ........................................7
Plain View (Cabinet: 1).....................................................8
Plain View (Cabinet: 2).....................................................9
Exploded View (Chassis) ...............................................10
Exploded View Parts List (Chassis)..............................11
Plain View (Chassis: 1) ...................................................12
Plain View (Chassis: 2) ...................................................13
Wiring Diagram...............................................................14
Block Diagram .................................................................16
Parts List ...........................................................................18
Verifying the Version......................................................21
Data Backup and Restore Operations ..........................21
System Update Procedure..............................................21
Performing a Factory Reset............................................21
Test Mode.........................................................................22
Circuit Board (Main Board) ...........................................28
Circuit Diagram (Main Board: 1/3)..............................30
Circuit Diagram (Main Board: 2/3)..............................32
Circuit Diagram (Main Board: 3/3)..............................34
Circuit Board (Panel, Amp, Input, Fuse Board)..........36
Circuit Diagram (Panel Board)......................................38
Circuit Diagram (Amp Board).......................................40
Circuit Diagram (Input Board)......................................41
Circuit Diagram (Fuse Board) .......................................41

Roland BOSS KATANA-50 Mk II Specifications

General

Power Output	50 W
Reverb	Yes
Amp Modeling	Yes
Type	Guitar Amplifier
Speaker Size	12 inch
Effects	Delay, Modulation, FX
EQ	3-band EQ (Bass, Middle, Treble)
Inputs	1 x 1/4 inch
Outputs	1 x 1/4 inch
USB	Yes
Footswitch I/O	1 x 1/4" Footswitch Input (for GA-FC compatible footswitch)
Presets	8

Summary

Cautionary Notes and Service Information

User Data Backup and Restoration Procedure

Procedure to back up and restore unit settings to prevent data loss.

Part Replacement Guidance and Notes

Instructions for component replacement, focusing on critical areas.

Service Parts List Availability

Explains why certain parts are unavailable as service parts.

Circuit Diagram Conventions and Abbreviations

Defines abbreviations like "NIU" and "UnPop" used in diagrams.

Roland Warranty Claim Information

Details required information for warranty claims.

Product Specifications Overview

Top Panel Control Locations

Top Panel Control Parts List

Lists and identifies parts for top panel controls.

Rear Panel Control Locations

Rear Panel Control Parts List

Lists and identifies parts for rear panel controls.

Cabinet Exploded View

Cabinet Parts and Procedures

Cabinet Exploded Parts List

Detailed list of parts comprising the amplifier cabinet.

Cabinet Disassembly and Assembly Notes

Crucial precautions for handling electronic components during service.

Cabinet Plain View Diagrams (Part 1)

Cabinet Plain View Diagram 1

Illustrated view of cabinet parts and their locations.

Cabinet Plain View Diagrams (Part 2)

Cabinet Plain View Diagram 2

Additional illustrated view of cabinet parts and their locations.

Chassis Exploded View

Chassis Parts List

Chassis Plain View Diagrams (Part 1)

Chassis Plain View Diagram 1

Illustrated view of chassis parts and their locations.

Chassis Plain View Diagrams (Part 2)

Chassis Plain View Diagram 2

Additional illustrated view of chassis parts and their locations.

Wiring Diagram

Block Diagram

Comprehensive Parts List

System Maintenance and Update Procedures

Verifying Unit Version

Procedure to check the current software version.

Data Backup and Restore Operations

Steps to save and load user data and settings.

System Update Procedure

Guide for updating the amplifier's firmware.

Performing a Factory Reset

Instructions to restore the unit to its default settings.

Test Mode Operations

Entering, Exiting, and Skipping Test Mode

Procedures for accessing, quitting, and bypassing tests.

Test Mode Items Overview

Lists and describes the various diagnostic tests available.

Test Mode: Model, Version, Switch, LED Checks

Model and Version Check

Verifies hardware model and software version.

Switch and LED Functionality Check

Tests the operation of buttons and indicator LEDs.

Test Mode: Selector, Volume, Jacks, Foot Switch

Selector and Volume Knob Checks

Verifies operation of selector knobs and volume controls.

Jack Sense & Foot Switch Check

Tests input jacks and foot switch functionality.

Test Mode: USB and Device Status

USB and Device Status Checks

Verifies USB connectivity and internal device status.

Signal and Noise Level Testing

Input Signal Level Verification

Measures audio signal levels at various outputs.

Noise Level Measurement

Measures residual noise levels in audio outputs.

Circuit Board Schematics (Main Board)

Main Board Circuit Diagram

Detailed schematic for the main circuit board.

Main Board Circuit Diagram (1/3)

Part one of the detailed schematic for the main circuit board.

Main Board Circuit Diagram (2/3)

Part two of the detailed schematic for the main circuit board.

Main Board Circuit Diagram (3/3)

Part three of the detailed schematic for the main circuit board.

Component Board Schematics

Panel, Amp, Input, Fuse Board Diagram

Schematics for multiple related circuit boards.

Panel Board Circuit Diagram

Amp Board Circuit Diagram

Input and Fuse Board Circuit Diagrams

Input Board Circuit Diagram

Schematic for the input circuit board.

Fuse Board Circuit Diagram

Schematic for the fuse circuit board.