Штатная магнитола. Разъемы.

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Head units

Location

The console accepts standard DIN-sized headunits. There is enough space for two full size components with a bit of space left over. The console contains a removable mounting bracket where components can be bolted. There is a fair amount of heat radiating up from the transmission tunnel though, so it might not be a good idea to pack so many components in the console. (For the same reason, mounting an amplifier in this location might not be the best choice). See installation hints section for information on how to remove the console panel.

Aftermarket Head Units

Any aftermarket head unit in the standard size should be easy to install in the factory location (pull-out units tend to be more of a pain to install, but they are not that common anymore). Aftermarket units can be classified into tuners and receivers, where receivers have an integrated amplifier but tuners do not, thus requiring an external amp.

Factory Head Units

The standard factory head unit is a Panasonic AM/FM Radio & Cassette, in a 1.5 height DIN unit. The following diagrams show the outputs on the three connectors:

Audio Signal Connector

[audio signal connector]

 

Headrest Speaker Connector

[headrest connector]

 

Main Connector

[main connector]

The Panasonic head unit has a common problem that appears as a failure to turn on in some occasions. Pressing the ON button produces a momentary flash of the display but it does not turn on. The tape unit usually accepts a tape if one is inserted, but does not begin to play it. It has been noted that the occurrence of this problem is usually correlated to high humidity situations. Typically, driving for 5-30 minutes solves the problem and the unit begins to operate as expected (presumably after the heat from the transmission has dried off the humidity?). Check here for a solution .

The factory unit has the capability to be programmed with a security code which should theoretically deter theft [can't imagine it does though]. The code can also be left unset, or deactivated. If the code is set and power disconnected to the unit, it will require the code in order to function again. If you set and forget the code (or buy a used car or unit which has the code set and unavailable), the Mazda dealer can unlock the radio by using an universal code. It has been reported that some dealers will deny knowing this code, or will attempt to charge unreasonably for the service.

1999 MAZDA MIATA STEREO INTERFACE

Revision 2 – 30 November 1999

Main Connector — CN701

Pin #

Signal Name

I/O

Description

9

POWER SUPPLY ACC

Input

Source of +12 volts switched by the ignition key. The unit is operable when this source is active.

10

H/F TEL MUTE

Input

When grounded, the audio outputs are muted. Probably used with a hands-free cell phone.

11

POWER SUPPLY +B

Input

Source of +12 volts directly from the battery. Used to maintain station memory, the clock, and control settings.

12

ANTENNA SW

Output

Driven to +12 volts when the AM or FM radio functions are in use. Used to control a power antenna.

13

+TNS

Input

When this line is at +12 volts, the panel illumination functions are enabled.

14

ILL –

Input

Controls the dimming of the panel illumination. When grounded, the panel is fully illuminated. At +12 volts, the illumination is off.

15

ST SW

Input

Active when grounded. Function undetermined. May be for steering wheel mounted switch that changes radio channels or CD selections.

16

AMP CONTROL

Output

Driven to +12 volts whenever the unit is on. Used to turn on an external power amplifier.

17

FRONT SPEAKER, LEFT +

Output

 

18

FRONT SPEAKER, LEFT –

Output

 

19

FRONT SPEAKER, RIGHT +

Output

 

20

FRONT SPEAKER, RIGHT –

Output

 

Auxiliary Input Connector — CN200

Cassette Output Connector — CNXXX

Pin #

Signal Name

I/O

Description

1

R INPUT

Input

Audio input, right channel (.3 vrms).

2

SIG GND   Signal ground for audio inputs.

3

L INPUT

Input

Audio input, left channel (.3 vrms).

4

COMBI CONTROL

Output

Driven to +5 volts when active.

5

AUX CONTROL OUT

Output

Driven to +5 volts when active.

6

AUX CONTROL IN

Input

NPN transistor base. Active when driven to + voltage through resistor.

7

BUS GND   Ground for serial data stream.

8

BUS LINE

Input

And

Output

Serial data stream for control of certain auxiliary equipment. Open collector drive with 22K pull-up to +5 volts.

9

POWER SUPPLY ACC

Output

Switched +12 volt power for auxiliary equipment.

10

GND   Ground for auxiliary equipment.

11

POWER SUPPLY +B

Output

Constant +12 volt power for auxiliary equipment.

12

MUTE

Input

When driven to +5 volts, the audio is muted. Allows auxiliary equipment to mute system.

13

+TNS

Output

For panel illumination of auxiliary equipment.

14

ILL –

Output

For panel illumination of auxiliary equipment.

15

No connection    

16

No connection    

Rear Speaker Connector — CN702

Pin #

Signal Name

I/O

1

REAR SPEAKER, LEFT +

Output

2

REAR SPEAKER, LEFT –

Output

3

No connection  

4

No connection  

5

REAR SPEAKER, RIGHT +

Output

6

REAR SPEAKER, RIGHT –

Output

7

No connection  

8

No connection  

 

 

Interface Signal Usage

Signal Name

Used by Cassette

Used by Changer

Function

R INPUT

Y

Y

Audio input, right channel.
SIG GND

Y

Y

Signal ground for audio inputs.
L INPUT

Y

Y

Audio input, left channel.
COMBI CONTROL

Y

N

Cassette stops when pulsed to +5 volts
AUX CONTROL OUT

Y

N

Cassette starts when pulsed to +5 volts.
AUX CONTROL IN

Y

N

+5 volts when cassette is running.
BUS GND

N

Y

Ground for serial data stream.
BUS LINE

N

Y

Serial data. Data code unknown.
POWER SUPPLY ACC

Y

Y

Switched +12 volt power.
GND

Y

Y

Ground.
POWER SUPPLY +B

Y

Y

Constant +12 volt power.
MUTE

Y

Y

Driven to +9 volts when tape winding and during transitions.
+TNS

Y

N

Panel lights on when at +12 volts.
ILL –

Y

N

Panel dimmer, full bright when grounded.

 

 

 

 

 
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