Brother BAS-304A Service Manual

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SERVICE MANUAL
{ELECTRICAL)
FOR
BAS-300A SERIES
BAS-304A•311A•314A•315A .. /- ·--- =
326A•326LA•341A•342A
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From the library of: Superior Sewing Machine & Supply LLC

Brother BAS-304A Specifications

General

Needle Type	DBx1
Stitch Length	5 mm
Feed Mechanism	Drop Feed
Power Consumption	550 W
Presser Foot Lift	Manual

Summary

Electrical Checks and DIP Switches

Voltage Measurement

Control Voltage Check

Measures control voltages between pins on connector P8.

+5V Source Check

Solenoid Voltage Measurement

Air Valve Voltage Check

DIP Switch Settings

DIP Switch Model Settings and Error List

Troubleshooting Flowchart: Power-Up and Floppy Disk

Troubleshooting Flowchart: Presser Plate and Start Position

Troubleshooting Flowchart: Test Operations

Troubleshooting Flowchart: Sewing and Thread Cutting

Troubleshooting Flowchart: Emergency Stop and Restart

Troubleshooting Flowchart: Programming Device

Problem Determination and Solution: Power and Floppy Issues

Problem Determination and Solution: R/W Switch and Presser Plate

Problem Determination and Solution: Presser Plate and Air Valve

Problem Determination and Solution: Presser Plate Return and Home Position

Problem Determination and Solution: Feed, Program, and Sewing

Problem Determination and Solution: Test Lamp, Feed, and Sewing

Problem Determination and Solution: Rapid Feed, Operation, and Thread Cut

Problem Determination and Solution: Thread Cut, Needle Stop, EM Switch

Problem Determination and Solution: Programming