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Homelite RY48ZTR75/100
Ryobi Homelite RY48ZTR75/100 User Manual
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R
y
obi R
Y48ZTR75/100
Riding Mowe
r
Electr
ical Components T
r
oubleshooting and T
es
ting
J.Davi
s
4-
18
-
2019
Anders
on, South Carol
ina
2
Table of Contents
Ryobi RY48ZTR75/100 Riding Mower Electrical Components Troubleshooting and Testing
1
Table of Contents
2
C
3
ZTR Mower Overview
4
Brushless Motors
5
Using this Document
6
ZTR Block Diagram And Control Flow
7
Troubleshooting: General
8
Troubleshooting: Detailed
9
Digital Multi Meter (DMM)
10
Other Helpful Tools and Parts
11
Component Locations
12
Controllers and Label Locations
13
Main Battery Connection
14
Testing Main Fuse
15
Testing Battery Voltage
16
Control Panel
17
Testing PTO (Power Take Off) Switch
18
Testing Headlight Switch
19
Testing Drive Speed Switch and Cutting Speed switch
20
Testing Fuel Gauge / Hour Meter
21
Testing Key Switch
22
Testing USB Port
23
Testing the Zero Switches
24
Testing the Neutral Switches
25
Testing Head Light Assembly
26
Testing Angular Transducer (Accelerator)
27
Testing Brake Switch
28
Testing the Beeper
29
Testing Seat Switch
30
Testing Master and Slave Blade Controllers
31
Testing Drive Motor Controllers
32
Testing Master and Slave Blade Motors
33
Test Drive Motors
34
Testing Drive Motor Hall Sensors (in Mower)
35
Testing Drive Motor Hall Sensors (Independently)
36
Testing 48V-to-12V (DC-DC) Converter
37
Testing DC-DC converter Fuse
38
Testing Relay
39
Testing Relay Diode
40
Testing the Charge Port and Interlock
41
Testing the Battery Charger
42
Testing the Battery Charger
43
Battery Charger Error Codes
44
ZTR Beep Diagnostic Codes
45
Testing the Temperature Sensor
46
Wire Harness Diagram
47
Pre and Post Repair Checklist
48
Electronics Tips for the Mechanical Small Engine Tech
49
Electronic Terms, Symbols, and Tools
50
Using The DMM to measure Volts
51
Using the DMM to Measure Resistance
52
Revision Log
53
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Ryobi Homelite RY48ZTR75/100 Specifications
General
Brand
Ryobi
Model
Homelite RY48ZTR75/100
Category
Lawn Mower
Language
English
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