Contents
3
Accessing the Main PCB 28
Opening the Display and Control Unit 28
Calibration/Adjustment 29
Calibration/Adjustment Sequence 29
Prerequisites for Calibration/Adjustment 29
Ambient Conditions 29
Operating Conditions 29
Preload 30
Checking the Preload 30
1. Checking the Preload with the Service Software 30
2. Adjusting the Preload with a Digital Voltmeter 30
Adjustment Specifications 31
Adjusting the Preload 32
Reproducibility 33
Off-center Load 33
Checking the Off-center Load 33
Adjusting the Off-center Load 34
Master
pro
Balances with the Small Single-Casting Block System 34
Master
pro
Balances with the Brass System 34
3-Point Adjustment (rough) 34
Master
pro
Balances with the Large Single-Casting Block System 35
Span Accuracy 36
Checking the Span Accuracy 36
Linearity 37
Checking the Linearity 37
Checking the Linearity on Balances with Less Than 1,000,000 Digits 37
Checking the Linearity on Balances with More Than 1,000,000 Digits
and PolyRange Balances 38
Repairing the Balance 39
Repairing the Weighing System 39
Repairing the Electronics 39
Replacing the PCB in the Display and Control Unit 39
Replacing the Display and Control Unit, Backlighting Module,
Keypad Overlay 40
Replacing the Balance PCB 40
Master
pro
Balances with the Small Single-Casting Block System
or Brass System 41
Master
pro
Balances with the Large Single-Casting Block System 41
Pin Assignments 42
Balance Operating Menu Codes Master
pro
LP 43
Balance Operating Menu Codes Master
pro
LA 46
Service Specifications 48
Service Specifications Sheet 1 48
Service Specifications Sheet 2 49
Spare part list LP / LA 50
LP / LA - Exploded-View Diagram 1 50
LP / LA - Exploded-View Diagram 2 52
LP / LA - Exploded-View Diagram 3 54
LP / LA - Exploded-View Diagram 4 56
LP / LA - Exploded-View Diagram 1a 58
LP / LA - Exploded-View Diagram 2a 60
LP / LA - Exploded-View Diagram 3a 62
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