McIntosh MCLK12 Owner's Manual

McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: [phone] www.mcintoshlabs.com

MCLK12

Analog Clock

Owner’s Manual

The lightning ash with arrowhead, within an equilateral
triangle, is intended to alert the user to the presence of
uninsulated “dangerous voltage” within the product’s en­closure that may be of sufcient magnitude to constitute
a risk of electric shock to persons.

The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.

WARNING - TO REDUCE RISK

OF FIRE OR ELECTRICAL

SHOCK, DO NOT EXPOSE

THIS EQUIPMENT TO RAIN OR

MOISTURE.

IMPORTANT SAFETY

INSTRUCTIONS!

PLEASE READ THEM BEFORE
OPERATING THIS EQUIPMENT.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install
in accordance with the manufacturer’s instruc­tions.

8. Do not install near any heat sources such as
radiators, heat registers, stoves, or other appa-

ratus (including ampliers) that produce heat.

9. Do not defeat the safety purpose of the polar­ized or grounding-type plug. A polarized plug
has two blades with one wider than the other.
A grounding type plug has two blades and a

NO USER-SERVICEABLE PARTS

INSIDE. REFER SERVICING TO

QUALIFIED PERSONNEL.

third grounding prong. The wide blade or the
third prong are provided for your safety. If

the provided plug does not t into your outlet,

consult an electrician for replacement of the
obsolete outlet.

10. Protect the power cord from being walked on
or pinched particularly at plugs, convenience
receptacles, and the point where they exit
from the apparatus.

11. Only use attachments/accessories specied by

the manufacturer.

12. Use only with the cart, stand, tripod, bracket,
or table specied by the manu­facturer, or sold with the appa­ratus. When a cart is used, use
caution when moving the cart/
apparatus combination to avoid
injury from tip-over.

13. Unplug this apparatus during lightning storms
or when unused for long periods of time.

14. Refer all servicing to qualied service person­nel. Servicing is required when the apparatus
has been damaged in any way, such as power-

To prevent the risk of electric

shock, do not remove cover or

back. No user-serviceable parts

inside.

supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally, or
has been dropped.

15. Do not expose this equipment to dripping or

splashing and ensure that no objects lled

with liquids, such as vases, are placed on the
equipment.

16. To completely disconnect this equipment from
the a.c. mains, disconnect the power supply
cord plug from the a.c. receptacle.

17. The mains plug of the power supply cord shall
remain readily operable.

18. Do not expose batteries to excessive heat such

as sunshine, re or the like.

19. Connect mains power supply cord only to a
mains socket outlet with a protective earthing
connection.

2

BACKUP

BATTERY

Battery
Socket

CR2032

3V

Tabs

CR2032

3V

BACKUP

BATTERY

CR2032

3V

CAUTION:

BACKUP

BATTERY

Danger of explosion if the battery is in­correctly installed. Only install one of the
approved Lithium Batteries listed below.

Battery Installation

The McIntosh MCLK12 Analog Clock uses a long
life Lithium Coin Cell type battery. The MCLK12
will function without a battery when connected to AC
Power. However, the battery will keep the current time
in the event there is an interruption of AC Power and
thus prevents the necessity of having to reset the cor­rect time when AC Power is restored. The MCLK12
may be supplied with a battery depending on the
country where the MCLK12 is purchased. When pur­chasing a battery for use in the MCLK12 refer to the
following list:

Approved Lithium Batteries

Brand IEC No. ANSI/NEDA No.

Energizer CR2032

Panasonic CR2032(PA/1B)15004LC

1

5004LC

Access to the recessed battery compartment is located
on the Rear Panel of the MCLK12. Refer to figure 1.

Battery

Compartment

1

CR Lithium Coin Cells contain Perchlorate Material - special handling

may apply. For additional information go to www.dtsc.ca.gov/hazaedous
waste/perchlorate/index.cfm

Figure 1

1

1

Perform the following steps to install the battery:

1. Press the tab and lift up on the Backup Battery
Cover and temporarily
place it aside. Refer to
figure 2.

2. Remove the CR2032
Battery from its pack­aging.

3. Orient the battery so
the + symbol (en-

Figure 2

graved into one side of the battery) is facing up.

4. Refering to figures 3, 4 and 5 insert the battery

Figure 3

Figure 4

into the socket. Make
sure the right side of the
battery is seated under
the two retaining tabs of
the socket before press­ing down on the left side

Figure 5

of the battery.

5. Reinstall the Backup
Battery Cover. Refer
to figure 6.

6. The MCLK12 Analog
Clock is now ready
for installation, con­nection and opera-

Figure 6

tion.

Battery Installation and Replacement

Battery Removal

The life of the Lithium Battery used in the McIntosh
Clock is approximately the shelf life of the battery

(10 - 15 years). However, it is advisable to remove the

battery from the MCLK12 when the clock is not con­nected to AC Power for an extended period of time.
This will help to extend battery life and avoid possible
damage to the clock.
Perform the following steps to remove the battery
from the clock:

1. Disconnect the AC Power Cord from the Rear
panel of the McIntosh MCLK12 Clock. Refer to
figure 1.

2. Press the tab and lift up on the Backup Battery
Cover and temporarily place it aside. Refer to
figure 2.

3. Refering to figure 7,
use a small pocket
size screw driver (or

other suitable tool)

and carefully insert
the tip of the tool be­tween the metal tab
of the battery socket
and the left side of
the battery. Then ro­tate the tool to release the battery from the socket.
Remove the battery from inside of the clock.

5. Reinstall the Backup Battery Cover. Refer to
figure 6.

6. Store the battery in a cool dry place for
future use or dispose of the battery in
accordance with the local regulations
for lithium battery disposal. Batteries
should never be thrown away or inciner­ated.

Figure 7

3

Thank You

Your decision to own this McIntosh MCLK12 Analog
Clock ranks you at the very top. You now have “The
Best.” The McIntosh dedication to “Quality,” is assur­ance that you will receive many years of acurate time
keeping from this unit.
Please take a short time to read the information in
this manual. We want you to be as familiar as pos­sible with all the features and functions of your new
McIntosh.

Please Take A Moment

The serial number, purchase date and McIntosh Dealer
name are important to you for possible insurance
claim or future service. The spaces below have been
provided for you to record that information:

Serial Number: _______________________________

Purchase Date: _______________________________

Dealer Name: ________________________________

Technical Assistance

If at any time you have questions about your McIntosh
product, contact your McIntosh Dealer who is familiar
with your McIntosh equipment and any other brands
that may be part of your system. If you or your Dealer
wish additional help concerning a suspected problem,
you can receive technical assistance for all McIntosh
products at:

McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: [phone]
Fax: [phone]

Customer Service

If it is determined that your McIntosh product is in
need of repair, you can return it to your Dealer. You
can also return it to the McIntosh Laboratory Service
Department. For assistance on factory repair return
procedure, contact the McIntosh Service Department
at:

McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: [phone]
Fax: [phone]

Table of Contents

Safety Instructions ...................................................... 2

Battery Installation and Replacement ......................... 3

Thank You and Please Take a Moment ....................... 4

Technical Assistance and Customer Service .............. 4

Table of Contents ........................................................ 4

General Information ................................................... 4

Connector and Cable Information ..............................5

Introduction ................................................................. 5

Performance Features ................................................. 5

Dimensions ................................................................. 6

Installation ..................................................................7

Rear Panel Connections .............................................. 8

Connections ................................................................ 9

Front Panel Displays and Controls ............................ 10

How to Operate the Clock..........................................11

Photos ................................................................... 12-13

Specifications ............................................................ 14

Packing Instructions ................................................. 15

General Information

1. For additional connection information, refer to the

owner’s manual(s) for any component(s) connected

to the MCLK12 Analog Clock.

2. The Main AC Power going to the MCLK12 and
any other McIntosh Component(s) should not be ap­plied until all the system components are connected
together. Failure to do so could result in mal­functioning of some or all of the system’s normal
operations. When other McIntosh Components are
in their Standby Power Off Mode, the Microproces­sor’s Circuitry inside each component is active and
communication is occurring between them.

3. When discarding the unit, comply with
local rules or regulations. Batteries should
never be thrown away or incinerated but
disposed of in accordance with the local
regulations concerning battery disposal.

4. For additional information on the
MCLK12 and other McIntosh Products
please visit the McIntosh Web Site at
www.mcintoshlabs.com.

Copyright 2011 © by McIntosh Laboratory, Inc.

4

Connector/Cable Information

Power
Control

Ground

Meter
Illumination
Control
Pass Thru

Power Control Connector

The MCLK12 Power Control Input receives an On/
Off signal from +5 to +12 volts. The Power Control
Output will in turn provide a +5 to +12 volts Output
Signal with a total current up to
50mA. An additional connec­tion is for controlling the illu­mination of Hours and Minutes
Meters on the MCLK12 along
with Power Output Meters on
compatible McIntosh Power Amplifiers. The 1/8 inch
stereo mini phone plug connects to a McIntosh Pream­plifier or A/V Control Center Power Control Output.

Note: The Power Control Connecting Cable is available

from the McIntosh Parts Department:

Data and Power Control Cable Part No. 170-202

Six foot, shielded 2 conductor, with 1/8 inch stereo
mini phone plugs on each end.

Introduction

The McIntosh MCLK12 Analog Clock is a precision
time piece designed to complement any Audio or Au­dio/Video System.

Performance Features

• Illuminated Meters

The large Minutes and Hour Meters on the MCLK12
display the current time and are illuminated with extra

long life Light Emitting Diodes (LEDs)

General Information, Connector/Cable Information, Introduction and Performance Features

• Precision Oscillator

The MCLK12 circuitry utilizes a precision tempera­ture compensated quartz crystal oscillator for accurate
time keeping, even with room temperature fluctua­tions.

• Lithium Battery

The long life Lithium Battery is used for backup of
the crystal oscillator for accurate time keeping in the
event there is an interuption of AC Power.

• Precision Parts

Only the finest precision parts are used throughout.

• Efficient Power Supply

Fully regulated Power Supply ensures stable, accu­rate time keeping operation even though the power
line many vary. Its efficient design allow for very low
energy consumption.

• Fiber Optic Solid State Front Panel Illumination

The even Illumination of the Front Panel is accom­plished by the combination of custom designed Fiber
Optic Light Diffusers and extra long life Light Emit-

ting Diodes (LEDs).

• Glass Front Panel

The famous McIntosh Illuminated Glass Front Panel
ensures the pristine beauty of the MCLK12 will be
retained for many years.

• Power Control

The Power Control Input and Output connections
provides convenient Turn-On/Off of Front Panel Il­lumination of the MCLK12 along with other McIntosh
Components.

5