Seca 727 Series User Manual

for seca 727, 728
Service Manual
7271321004
7271321124
7271321334
7271321614
7271321624
7271321804
7271321844
7281321009
7281321129
7281321619
7281321834
High resolution baby scales with integrated LED-display
Valid as of: 01.12.2010
Variants:
Content:
Function diagram 25-01-02-481 a
Electronics 25-01-02-467 e
Block diagram electronics 08-09-01-267 c
Description of RS232 interface 30-34-00-605 a
Description of faults 30-34-00-437 g
Replacement 30-34-00-483 e
Calibration 30-34-00-654
spare parts 30-34-00-486 k
Description:
Service Manual Number
17-05-01-260-i
Manual number: 17-05-01-260-i

Seca 727 Series Specifications

General

Brand	Seca
Model	727 Series
Category	Scales
Language	English

Summary

Function Diagram

Electronics Circuit Description

Circuit Description

Detailed explanation of the electronic components and their functions.

Microcontroller and Display Functionality

Explains the role of the microcontroller and display system.

Block Diagram of Electronics

RS232 Interface Description

RS232 Hardware Description

Details the hardware components of the RS232 interface.

RS232 Transmission Parameters

Specifies baud rate, parity, databits, and stopbits for RS232.

RS232 Data Protocol

Outlines the ASCII coded data block structure and format.

Troubleshooting: Battery and Start-up Faults

Battery Charging Faults

Troubleshooting steps for battery not charging correctly.

Scale Start-up Faults

Diagnosing issues when the scale fails to start.

Troubleshooting: Display and Operation Faults

"bAtt" Display Fault

Addresses the "bAtt" error message indicating low voltage.

Digit and Segment Malfunction

Diagnosing defective display digits and segments.

Mains Operation Monitor Faults

Troubleshooting the auto-shutoff function for mains operation.

Troubleshooting: Specific Model and Weight Faults

Model 748 Signal Transmitter Faults

Specific troubleshooting for the signal transmitter on model 748.

Incorrect Weight Display Fault

Adjusting slope for correct weight display.

"EEEE" Display Fault

Diagnosing the "EEEE" error on scale start-up.

Replacement Instructions

Opening and Disassembling the Scale

Steps for safely opening and disassembling the scale.

Electronic Component Replacement Procedures

Guidance on troubleshooting and replacing electronic parts.

Display Electronics Replacement

Instructions for replacing display electronics components.

Load Cell and Electronics Faults

Procedures for faults involving load cell and electronics.

Scale Reassembly

Steps for reassembling the scale after repairs.

Scale Calibration Procedure

Adjusting Scale Model 727 and 728

Step-by-step guide for calibrating models 727 and 728.

Spare Parts List

Seca 727/728 Spare Parts

List of available spare parts for seca 727/728 models.