Leica M500 N, M520, M525 User manual

Service manual Leica M500 N, M520, M525

10 665 751 – Release 09/2007

Table of contents

1. Technical Description

2. Wiring Diagram and Locations

3. Service Programs

4. Fault Finding

5. Replacing Modules

6. Maintenance Service

7. Inspection

8. Spare Parts

Release 09/2007

• First edition

Service manual Leica M500 N, M520, M525 Description Doc Code 10 665 751

1-I

08/2007 Gahe

1. Description - Leica M500 N, M520, M525

Table of content

Chapter Page

System description 1-1

General 1-1

Overview control unit 1-1

Overview optics carrier 1-2

Electrical accessories 1-3

Optical/mechanical accessories 1-3

Configuration M525 systems 1-4

Product history M500 N…M525 1-5

Electrical description 1-7

General 1-7

CAN bus 1-8

Optics carrier 1-9

Control unit 1-11

Technical data M525 1-13

Description Service manual M500 N, M520, M525 08/2007 Gahe

1-II

Doc Code 10 665 751

Service manual M500 N, M520, M525 Description Doc Code 10 665 751

1-1 08/2007 Gahe

Description of the Leica M500 N, M520, M525

System description

General

The Leica M500 N / M520 /M525 surgical microscope is an optical instrument which uses magnification and illumination to improve visibility. It is dedicated mainly for Neurosurgery discipline. The microscope is always used together with a Leica stand system – refer to product history on page 1-5. Electrically the optics carrier and the control unit are connected together to the stand system by the CAN bus. Newer generations of stand systems (like OH4) have their own MDC (microscope device controller) and take over the task of the M500 N control unit.

Overview control unit M500 N / M520

Grounding socket*

* Only for control unit with internal power supply

Power switch*

Power inlet*

Display

Switch panel with 9 keys

Electrical interfaces

Description Service manual M500 N, M520, M525

1-2

08/2007 Gahe

Doc Code 10 665 751

Overview optics carrier M525

Handgrip interface

M525 only: Iris reset

Drive illumination diaphragm (M525: Iris override)

LED WD lock indication

WD lock button

A/B slide

Service & CAN res

CAN interface

Fiber optics interface

Dovetail interface

Manual drive zoom

Interface for

rotective glass

Laser interface

Manual drive WD

Display WD (M520/M525)

Service manual M500 N, M520, M525 Description Doc Code 10 665 751

1-3 08/2007 Gahe

Electrical accessories

- All Leica hand- and footswitches fit to the control unit M500 N / M520 (restriction for 16 function switch – it is

handled as a 12 function switch only)

- CAN handle

- DI C500

- Autofocus device

- Fluorescence devices (available for some stand systems only)

Optical/mechanical accessories

- All optical equipment with dovetail interface fit to the optics carrier. Refer to appropriate stand user manual

for allowed loads and configurations

- Interface for protective glass 10 446 058

- Interface for universal Laser adapter 10 448 079 (M520 & M525)

- Interface for universal Laser adapter 10 446 615 (M500 N)

- Sterilisable knobs

- Interface for right handgrip

- Interface for fiber optic

Description Service manual M500 N, M520, M525

(

)

1-4

08/2007 Gahe

Doc Code 10 665 751

Current configurations Leica M525 (state 08/2007)

10448237 M525 optics carrier (with A/B-slide)

10448238 M525 optics carrier

no A/B slide

M525 F40

M525

M525 MC1

M525 OH4

10448169 control unit

Control unit M520 not used anymore - a new controller is integrated

in OH4 system

10448068 control unit

10448144 control unit

10448236 OH4 stand s

stem

Service manual M500 N, M520, M525 Description Doc Code 10 665 751

1-5 08/2007 Gahe

Product history Leica M500N - M520 - M525

Date / event Description: Remark

1997 / Launch M500 N

02/2001 / product change in optics carrier

07/2001 / Launch with MS2

11/2002 / Launch with OH3

04/2003 / Launch with MS3 10 446 757 M500 N optics carrier

10/2003 / Product change in optics carrier: New M520 optics carrier

07/2004 / Launch M520 F40 10 448 029 M520 optics carrier for

03/2005 Product change of control unit: removed power supply

09/2005 Product launch M520 C40 and CT40

07/2006 Product change in M520 optics carrier

10 446 481 M500 N optics carrier 10 446 489 control unit

10 446 757 M500 N optics carrier replaces 10 446 481

10 446 757 M500 N optics carrier 10 446 489 control unit

10 711851 control unit for OH3 10 448 019 M500 N optics carrier (without A/B slide)

10 446 489 control unit

10 448 029 M520 optics carrier replaces 10 446 757 OHS1; 10 448 035 M520 optics carrier (without A/B slide) for OH3 replaces 10 448 019

Upgrade kit was available: 10 712 316, upgrade kit M500 N to M520 optics carrier; description 10

665 687;

(10 446 757 10 448 019

F40, 10 448 068 control unit for F40

10 448 144 control unit replaces 10 446 489

10 448 029 M520 optics carrier and new control unit 10 448 169 for C40 and CT40

10 448 029 M520 optics carrier and 10 448 035 M520 optics carrier with new zoom unit

to 10 448 070;

to 10448 071)

for MS2, MS3,

;

For stand systems OHS1, MS1, MC1

New emergency drive for zoom

Additional for MS2 stand system

Additional for OH3 stand system

Additional for MS3 stand system

New illumination unit and new multifoc objective : More light 30%, increased working distance from 407 to 470mm, display for working distance, improved illumination optics – lead free glass. Zoom unit : new diaphragm (10 712

255) for better depth of field reduced diameter to 12mm. New Lemo plug instead fixed CAN cable – external cable required.

For stand systems OH3, OHS1, MS3, MS2, MS1, MC1

Control unit without power supply and with new holder

All stand systems from 03/2005 on can provide 24V;

Control unit compatible, but with new holder

Paint on zoom lenses as a diaphragm

Description Service manual M500 N, M520, M525

1-6

08/2007 Gahe

Doc Code 10 665 751

09/2006 Product change to M525 optics carrier

10 448 237 M525 optics carrier replaces 10 448 029

for MC1, F40, MS3, C40, CT40 10 448 238 M525 optics carrier (without A/B slide) replaces 10448 035

for OH4

Upgrade kit available for limited time: 10 714 461 Upgrade kit M520 to M525; description 10 665 743 (10 448 029 10 448 035

to 10 448 246;

to 10 448 247)

New illumination unit, additional AutoIris function, new motor controller, removed illumination zoom.

For stand systems OH4, MS3, MC1, F40, C40, CT40

Service manual M500 N, M520, M525 Description

Doc Code 10 665 751

1-7 08/2007 Gahe

Electrical description

General

The optics carrier is a high performance operating microscope with adjustable working height and integrated zoom, with M525 also an integrated autoIris. The zoom- and the focus functions, for M525 also the Iris functions, are microprocessor controlled in order to give the user the maximum comfort. The electronics in the optics-carrier consists of only one board, with the microprocessor, memory, motorcontrollers and interfaces on it.

A control unit is needed to store the settings, to read hand/footswitches and to control the optics- carrier, manage CAN bus activities and to display the status/settings. It consists of one controller board, called control module, a LCD module and a switch panel. Former control units contain a power supply as well.

Overview of system:

*Possible options on CAN bus:

CAN handle

DI C500

Autofocus

Swing carrier

Fluorescence

Optics-carrier

Zoom

Iris

Multifoc

RS-232 Service

dd.

Funktion

Hand/Footswitch

MF off

Control unit

J9 J8

CAN-Bus

Iris c ont rol

P10

Option*

CAN-Res. Service

CAN-Bus

P1 P3

Iris function (P8, P9, P10): only in M525

CAN

CAN-Bus

+24V

CAN

max 240VAC

External. CAN modul

CAN

Leica Stand

Description Service manual M500 N, M520, M525 08/2007 Gahe

CAN bus

CAN-bus principle

The CAN-bus (Controller Area Network) is a bi-directional, two-wire bus. It is used to handle the communication between the control unit, the optics-carrier, the stand and other CAN devices. The CAN-bus uses a protocol which largely suppresses transmission errors. The CAN bus in the M500 N/M520/M525 system is operated in the configuration “standard – CAN”.

Data transfer

The bus is looped through each of the controllers. Data is transferred serially, bit by bit, with differential signals. The data transfer is rated at with 50kBit/s. The data can be exchanged between each of the controllers. A data transfer consists of:

• Start bit,

• Identification, enabling the priority to be determined,

• The data itself, and

• CRC (Cyclic Redundancy Check).

Each controller recognizes the data related to its task. If a controller wants to send data, it has to wait until the bus is free. The feature of setting the priority of commands is not applied in the M500 N/M520/M525 system; all commands have the same priority.

Command interpretation by control unit

The control unit reads CAN commands from CAN handles and from other CAN members. It interprets the received commands and releases appropriate commands to the CAN bus. The concerning CAN device will then release a required action.

Safety concept - brake watch dog

The control unit must periodically (100ms) send a brake state message. If no periodic brake state message is received by the connected stand/brake controller, all brakes will lock.

Terminating impedance

In control unit: the end of the CAN-bus is terminated with an impedance of 120Ω. The controller detects if it is at the end of the bus or if another device is connected (CAN cable is coded: Pin 4 is bridged to pin 8 in the connector housing). In optics carrier: the controller of the optics carrier is always terminated by 120Ω; other devices, connected to the bus at the optics carrier are not terminated.

1-8

Doc Code 10 665 751

Service manual M500 N, M520, M525 Description Doc Code 10 665 751

1-9 08/2007 Gahe

Optics carrier

Blockdiagram motorcontroller M500 N, M520

CAN

CAN-Res.

Reset

EEPROM

MF off

Option

24V

120E

CANTrans.

CANController 82527

On-chip RAM 1kx8

Prozessor H8/532

On-chipPeripherals, Watchdog

SCI

PWM

EPROM 128Kx8

MEM3200 Universal

Counter

ZoomMotor Driver

MultifocMotor Driver

Zoom

Multifoc

+24V

Service

motcontr.ds4

Addition for motorcontroller M525:

P10 CAN

PWM

Iris Motor Driver

+24V

Iris

Iris control

Powering

The optics-carrier is powered via the CAN-bus cable with +24VDC. Power consumption is appr. 50mA in wait state, 150mA when one motor is running; 500mA when both motors, focus and zoom are blocked. A DC/DC converter on the motorcontroller delivers +5V for logic supply. The +24VDC is measured on the controller board with the microprocessor analog input. It can be asked in the diagnostic menu of the control unit.

Description Service manual M500 N, M520, M525

1-10

08/2007 Gahe

Doc Code 10 665 751

Processor

A watch-dog is integrated in the H8-processor. It observes the running of the main program. Diagnosis LED’s might help with trouble shooting, refer to chapter 4 – fault finding / diagnosis LED’s. The PWM outputs are driven with the optimum frequency of 20kHz (above the noise-limit, below magnetization problems).

Motor driver

The zoom- , focus and Iris motors are powered with a +24V PWM-signal. A one-chip controller receives enable-, direction- and the puls-rate-information from the processor and drives the motors accordingly. All motors have an encoder mounted directly on the motor axis. The encoder pulses are received by a counter, where the A/B-signals (direction) are decoded and the actual position transferred further to the processor. A current limitation for the motors becomes active for current > 0,3A.

Range The initializing of the microscope sets the lower limit to 1000 encoder-pulses. The actual upper limit is determine with counting the encoder-pulses (constants are stored for these values; deviations of the displayed values are possible due to mechanical tolerances).

Focus 207mm

Zoom OU T Zoom IN

DOWN UP

Focus 407mmDOWN

or 470mm (M520, M525)

800

1000

working range

upper limit

range.ds4

Zoom: 28500 Focus: 23800

RS232

A serial interface for service purposes is available. It is directly wired to the Optics-carrier processor - and has therefore other signal level for TxD than RS232 standard.

Recognition of optics carrier type

Since the increase of the working distance from 407 to 470mm (M500 N to M520) a recognition of the optics carrier type is required. A bridge on P6 (pin1-pin4) is installed in optics carrier M520 and M525. A status command, requested from control unit at system start , delivers the information if the bridge is installed or not.

Additional functionality on motorcontroller for M525

The AutoIrsis function in the M525 required an additional motor and a redesign of the motorcontroller. All existing functions were taken over (backwards compatible) and additional circuits for Iris motor drive and Iris control were integrated. The movement of the Iris motor is completely handled by the motorcontroller, no direct access via the CAN bus is possible.

Software history

Software

Release date HW motorcontroller Compatibility Remark

version

1.4 02/98 10 661 250 M500 N

2.3 04/99 -“- M500 N

2.4 05/01 -“- M500 N, M520

4.4 xx/06 10 714 356 M500 N, M520, M525 Software compatibility in respect of control unit see chapter inspection / step 2.13.

Service manual M500 N, M520, M525 Description

Doc Code 10 665 751

1-11 08/2007 Gahe

Control unit

Blockdiagram

Hand-/Footswitch 1 and 2

CANBus

Service, Download

RS232

Relay contact

24V

Watchdog Timer

RS232

CANTrans.

386EX CPU,

PLD Glue Logic, Bus Transceivers

DUART

CANController 82527

40MHz

CLK2

Processor

J10

LCD - Graphic Controlle

J11

LCD - Display

240 x 128 Dots

with VF-backlight

RAM

256kByte

FlashEPROM 256KByte

Power-off Timer

EEPROM

4 kByte

+24V

max 230V AC

"Gold"-

capacitor

Power supply removed since 03/2005

Function keys

steuerge.ds4

Powering

Control units before 03/2005 had a power inlet for 230VAC ad the built-in power supply could feed the system with +24VDC. This was required in stand systems having no own power supply like the MC1. Since 03/2005 all stand systems have their own power supply. So the power supply was removed from control unit, now it is supplied via the CAN bus cable with 24VDC.

Processor

An Intel 386EX Processor is used. It is clocked with 20MHz. The memory consists of 256kByte RAM, 256kByte FlashEPROM and 4kByte EEPROM. The software can be updated/downloaded through the RS232 service-interface. A watch-dog is integrated, it observes the running of the main program. Diagnosis LED’s might help with trouble shooting, refer to chapter 4 – fault finding / diagnosis LED’s.

Description Service manual M500 N, M520, M525 08/2007 Gahe

Display / Keyboard

The communication with the user is done with help of an high-contrast display and a keyboard with nine keys. The display is a LCD Matrix (240x128 dots) with integrated Graphic controller and backlight.

Can-bus

The CAN-bus has two go-through-input/outputs with two identical parallel connectors.

Hand/Footswitch

There are two RS232 interface-connectors available for all available hand / footswitches. They are wired to the DUART-interface and are clocked with 4800 Baud. The control unit periodically (60ms) sends a request to the connected footswitch. It sends back a status code (2 Byte), indicating which key is pressed/not pressed.

Service interface

A double RS232 interface is provided for service purposes. They are both wired directly to the Processor (RXD0/TXD0, RXD1/TXD1) The connector P7 is used for both of them. COM1 (RXD0/TXD0) is programmed for a service-terminal, for example for downloading new software version into the Flash-EPROM.

Additional function

There are two relay-contacts on the control unit connector panel for additional functions. The maximum permissible loading for one contact is 1 A/24 V DC. The relay-contacts can be programmed to switch- or toggle mode.

Software history

Software version

1.4 02/98 10 661 330 M500 N

1.54 01/00 -“- M500 N

1.76 04/02 -“- M500 N Supports Can handles, DI C500

1.81 -“- M500 N Supports OH3

1.84 -“- M500 N Supports MS3, CAN handle can

1.87 -“- M500 N, M520, M525 Supports M520, M525 Software compatibility in respect of optics carrier see chapter inspection / step 2.13.

Release date HW control module Compatibility Remark

1-12

Doc Code 10 665 751

be configured separate

Service manual M500 N, M520, M525 Description Doc Code 10 665 751

1-13 08/2007 Gahe

Technical data

Optics carrier M525 Stock n° 10448237 M525 optics carrier 10448238 M525 optics carrier OH4 Zoom 6:1 zoom, motorized Magnification Total magnification with 10x eyepiece 1,2 x to 12,8 Working distance 207-470 mm, variable through motorized multi-focal lens, continuously adjustable;

manually adjustable by emergency knob Display Analog display of working distance Field of view (diameter) 16,5mm to 180 mm with 10x eyepiece Objective Multi-focal lens 207-470 mm variable working distance Illumination Continually adjustable illumination field diameter with gauss-shaped light distribution AutoIrisTM Built-in automatic zoom-synchronized illumination filed diameter with manual override and

reset feature Outlet interface Dovetail ring

Control unit M500 N/M520

Stock n° 10448169 (M525 C40/CT40) 10448068 (M525 F40) 10448144 (MC1, MS3) Display LCD display Adjustment of Speed for zoom and focus, brightness and backlight intensity of display, WD and zoom Interfaces RS232 for service 2x RS232 for foot/handswitch 2x additional function (programmable relay contact) CAN port Two CAN-ports, 24V max 50W

Description Service manual M500 N, M520, M525 08/2007 Gahe

1-14

Doc Code 10 665 751

Service manual Leica M500 N, M520, M525 Wiring Doc Code 10 665 751

-I

07/2007 Gahe

2. Wiring and locations Leica M500 N, M520, M525

Table of content

Chapter Page

Optics carrier 2-1

Control unit 2-4

Overview of connectors 2-6

Wiring diagrams 2-8

Wiring diagram M525 719072 2-9

Wiring diagram M500 N / M520 707276 2-11

Wiring Service manual M500 N, M520, M525 07/2007 Gahe

2-II

Doc Code 10 665 751

Service manual M500 N, M520, M525 Wiring Doc Code 10 665 751

2-1 07/2007 Gahe

Wiring and locations Leica M500 N, M520, M525

Optics carrier

Zoom/multifoc motor controller 10714356

Wiring Service manual M500 N, M520, M525

2-2

07/2007 Gahe

Doc Code 10 665 751

Zoom/multifoc motor controller 10661250 (M500 N/M520 only)

Bridge for M520/M525 only; Removed when used in M500 N

Switch board

View from wiring side:

Service manual M500 N, M520, M525 Wiring Doc Code 10 665 751

2-3 07/2007 Gahe

Iris switch assembly

Wiring Service manual M500 N, M520, M525 07/2007 Gahe

2-4

Doc Code 10 665 751

Control unit

Control module

Power supply (only in control units till March 2005)

Service manual M500 N, M520, M525 Wiring Doc Code 10 665 751

2-5 07/2007 Gahe

LCD module

P11

J12

Switch panel

Wiring Service manual M500 N, M520, M525 07/2007 Gahe

2-6

Doc Code 10 665 751

Overview of connectors

Connector Page Module / connecting to

Optics Carrier

P1 2-1, 2-2 Motor controller / service port

P2 2-1, 2-2 Motor controller / CAN

P3 2-1, 2-2 Motor controller / CAN res.

P4 2-1, 2-2 Motor controller / zoom motor

P5 2-1, 2-2 Motor controller / focus motor

P6 2-1, 2-2 Motor controller / switch board

J6 2-2 Switch board

P7 2-1, 2-2 Motor controller / Res.

J7 - Optics carrier / Service/CAN res. (Lemo with cap)

P8 2-1 Motor controller / Iris motor

P9 2-1 Motor controller / Iris switch assembly

J9 2-3 Iris switch assembly

P10 2-1 Motor controller / CAN (to stand system)

Control unit

P1 2-4 Control module / test port (not used)

P2 2-4 Power supply / input power

J2 2-4 Control module / CAN1

P3 2-4 Power supply / output power

J3 2-4 Control module / CAN2

P4 2-4 Control module / not used

J5 2-4 Control module / remote 1

J6 2-4 Control module / remote 2

P7 2-4 Control module / service RS232

J8 2-4 Control module / add. function 1

J9 2-4 Control module / add. function 2

J10 2-4 Control module / switch panel

P10 2-5 Switch panel / control module

P11 2-5 LCD module / control module

J11 2-4 Control module / LCD module

Service manual M500 N, M520, M525 Wiring Doc Code 10 665 751

2-7 07/2007 Gahe

P12 2-4 Control module / LCD module backlight

J12 2-5 LCD module /control module

P13 2-4 Control module / input from power module

Wiring Service manual M500 N, M520, M525 07/2007 Gahe

2-8

Doc Code 10 665 751

Wiring diagrams in A3 format

Wiring diagram M525 10719072 on page 2-9 Wiring diagram M500 N/M520: 707276 A on page 2-11

+ 64 hidden pages

Leica M500 N, M520, M525 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual