5
If the CR12 is interconnected with a McIntosh C39 or
MX130 A/V Control Center, and both components are lo-
cated together, the internal front panel IR sensor must be
disabled. This avoids interference problems caused by
sending IR commands simultaneously to the front panel
sensors of BOTH units.
1. Remove the top cover of the CR12.
2. With the CR12 front facing you, locate a small slide
switch on the large vertical circuit board near the top of
the right side behind the front panel.
3. Move the switch to the Right.
Pre-Installation
CR12 Front Panel Sensor Disabling
Keypad Terminal Connector
To use a WK-3 or WK-4 keypad, connect the shield and
four leads of a shielded 4 conductor cable to a keypad ter-
minal connector, according to the numbers listed below.
There is a similar numbered connector built-in to each key-
pad.
1. Supply Voltage Positive
2. Supply Voltage Ground
3. Cable Shield
4. Signal Data
5. Signal Data Ground
Din Connector Pin Layouts for Balanced Outputs
1. Left Channel (-)
2. (Not used)
3. Right Channel(-)
4. Left Channel Ground
5. Right Channel Ground
6. Left Channel (+)
7. Right Channel (+)
Connector Information
Connecting Cables and Connectors
Connecting Cables and Connectors are available from the
McIntosh Parts Department:
Data and Power Control Cable Part
No. 170-202
Six foot, shielded 2 conductor, with 118 inch stereo
mini phone plugs on each end
Control Center to CR12 Cable Part No. 170-203
Three foot, DB25, Shielded, straight through, 25 con-
ductor male-to-male cable.
CR12 to CR12 Cable Part No. 170-430
Six foot, DB3 7, shielded, straight through, 3 7 conduc-
tor male-to-male cable.
Control Center to Multi Channel Power Amplifier
Cable Part No. 170-631
Six foot, DB25, shielded, straight through, 25 conduc-
tor male-to-female cable.
CR12 Keypad Terminal Plug Part No. 117-634
Five Pin connector for attaching the 4 conductor cable
to the CR12 Keypad Socket.
Located inside the CR12
