Radio Head
The radio head faceplate interfaces with the operator through control buttons/knobs, a liquid crystal display (LCD), a four channel integrated amplifier, and playback mechanisms, CD and/or tape. The controls operate various music modes and conditions of the audio subsystem which enable the operator to control power, volume, fade, balance, bass, and treble equalization settings, along with media playback control, CD or tape. The LCD is located in the center of the radio head faceplate for the operator to see the feedback from the radio. The radio head processes AM or FM stereo signals from the antenna system and sends the output to the speakers. The radio head also processes and plays the pre-recorded music from the in-dash CD and/or tape playback mechanism or the remote CD changer. The tape mechanism is able to differentiate between FeO2 (Type 1) or CrO2 (Type II/IV) type tapes. The functions of the playback mechanism, CD or tape, are controlled by the controls on the radio head faceplate.
The radio head is located in the middle of the instrument panel and is fastened using two chassis side-mounted brackets which utilize two fasteners and two rubber pins (one on each side of the radio opening) for locating the radio. The radio head is electrically connected to the radio IP harness via a 24-way connector for base radios and up-level radios. There is also a 12-way connector for up-level radios to connect the CD changer/player jumper connector. A ground strap terminal is located on the right rear side of the radio head unit and the antenna connector is located on the left rear side of the radio head unit. The harness connectors, antenna connector, and ground strap are inserted prior to mounting the radio in the vehicle. To allow for radio serviceability, sufficient room is allocated behind the radio for the wires and the coax cable.
There are four different radios available: AM/FM stereo with compartment, AM/FM stereo CD with compartment, AM/FM stereo cassette, and AM/FM stereo cassette and CD. For more details on these radios, please refer to the "System Check" and the "Radio Specifications" sections in this service manual.
The clock time is displayed continuously even when the ignition is OFF. Back lighting of the display occurs when the ignition is ON. If the RCL button is pressed when the ignition is OFF, then the LCD back lighting will be ON temporarily.
Radio Ground Strap
There is a ground strap attached to the radio to ensure an effective ground path. The ground strap is a braided copper wire that routes from the rear of the radio to the bolt that attaches the IPFB to the H-brace The radio ground strap is connected to the radio by a spade type terminal. If the radio ground strap is not reconnected after being disconnected for service, the audio system will still function, but the sound quality will be reduced.
CD Changer/Player (Optional)
The 6-disc remote CD changer/player with magazine is mounted inside the armrest of the console. The CD changer/player is vertically mounted with the CD changer/player door opening closest to the front of the vehicle. To ensure CD changer/player skip performance the CD changer/player is mounted rigidly.
The remote CD changer/player has a separate fuse from the radio and receives its power and signals through the radio. The CD changer/player has a wiring jumper connected between the radio and CD changer/player which includes shielding for the audio signals. The CD changer/player is available only with up-level radios. If a customer with a base radio would like a CD changer/player, that customer must upgrade their radio to an up-level radio, either the AM/FM tape or the AM/FM tape and CD.
Speaker Sound System Interface
The speakers receive information from the radio in the form of electrical current through the speaker wires. The electrical current produces the electromagnetic forces which cause the speaker cone to move, which in turn creates acoustical energy. The acoustical energy radiates from the speakers and is received by the operator as sound. If the speaker wires occasionally become shorted-to-ground or to vehicle power, the radio will sense these conditions and shut down in a non-destructive manner. After the short condition is removed, normal radio operation will return.
The speakers are mounted to a flat door inner surface and provide a splash proof housing and seal through the use of a gasket on the speaker basket flange that meets the door inner sheet metal. The supporting structure is rigid as to not allow unwanted resonance or loss in bass frequencies. Grilles are used to protect the speaker covering since they allow the speaker the freedom to move and breath to make the performance more predictable. The minimum speaker impedance per channel is four ohms and the interface to the speakers is through 18 gage wire through the body harness. The front speakers are mounted low and forward in the front doors. The rear speakers for the coupe and sedan are mounted on the package shelf while the rear speakers for the wagon are mounted on the liftgate panel assembly.
Antenna System
The antenna system receives broadcast AM or FM stereo signals from free space and sends the signals to the radio receiver for processing via a coaxial antenna cable. The antenna cable is a coax cable, which connects the radio to the antenna. The antenna ground should not exceed 50 m ohms when measuring between the antenna connector shield and negative battery terminal. The AM broadcast is 522-1629 KHz in 9 KHz steps while the FM broadcast is 76-90 MHz in 100 KHz steps.
The mast antenna is mounted on the right front side of the vehicle. The fixed mast antenna has a single 1/4 wave monopole receiving element which protrudes from the vehicle. The fixed mast antenna directly receives RF signals and feeds the signal directly to the radio head for processing.
Cassette, In-Dash Compact Disc, and CD Changer/Player Function
6 AM/12 FM Radio Station Presets: Programmable by following 2 steps:- Tune in desired station on the desired band.
- Push and hold the desired preset button for approximately 1 second, until an audio confirmation beep is heard.
Electronic Tuning: Automatically locks in station signals for best possible reception.
Seek Tuning: Provides up and down seek capability for radio bands to search for the next receivable station.
Scan Tuning: Samples program selection for five seconds and then automatically moves to the next radio station. An audible tone indicates scan mode searching after button is held for more than 3 seconds.
Automatic Loudness Compensation: Full depth of sound can be heard at low volume levels.
Auto Tone Control (ATC): Allows the sound to be tailored to meet individual preferences. Seven different selectable preset tones are available along with the CSTM (custom) tone. The CSTM tome is set by pressing and rotating the BASS/TREB/FADE/BAL knob. The setting can be permanently or temporarily shown on the display by pressing and holding the BASS/TREB/FADE/BAL knob until an audible tone is heard.
Rotary Bass, Treble, Fade, and Balance Control Knob: The BASS/TREB/FADE/BAL knob allows the bass, treble, fade, and balance modes to be adjusted. Push the knob in until the desired mode is on the display, then rotate to adjust.
When The Time of Day (Clock) Is Displayed
- The ignition is turned OFF and the radio power is either ON or OFF. Press RCL button if back lighting is desired.
- The ignition is turned ON and the radio power is OFF.
- The ignition is turned ON, the radio is ON, and the tune, seek, scan, or preset function has not been activated for 10 seconds.
Setting the Time of Day (Clock)
- Push and hold the RCL (Recall) button.
- While holding the RCL button, push the left side of the auto tone button until the correct hour appears.
- While holding the RCL button, push the right side of the auto tone button until the correct minute appears.
- Release the RCL button when complete.
Remote Compact Disc Changer/Player Compatible: Radio functions operate a remotely located 6-disc CD changer/player.
Theft Deterrent: On-board diagnostics (OBD) are available to check:
| • | If any diagnostic trouble codes (DTCs) have been set. |
| • | If speakers are functioning correctly at two different tones. |
| • | If all segments on the LCD light up. |
| • | If all buttons are working. |
| • | What equalization mode the radio is set at. |
| • | What antenna signal strength is being read by the radio. |
| • | If the CD changer/player is connected and communicating with the radio. |
Cassette Player Function
Power Loading/Unloading: Tape is loaded with power assist.Auto Reverse Tape: Plays both sides of a tape with no need to eject.
Power Off Tape Protection: Prevents tape damage if the ignition is turned off while tape is in play mode.
Soft Touch Tape Controls: Controls tape functions: Previous (PREV), Next, Rewind (REW), and Fast Forward (FF).
Radio Monitor: The radio is played while the tape player is fast rewinding or fast forwarding a tape.
Next/Previous Music Search: The tape player automatically locates the beginning of the next or current selection.
Tape Side Changing: Changes side of the tape being played with the press of a button.
Dolby®B Noise Reudction (Switchable): Reduces hiss on Dolby® encoded tapes.
Automatic Metal Tape Equalization: Allows better sound quality when using metal tapes.
Repeat Play Button: Repeats desired selection on the tape.
Fast Forward/Rewind, Next/Previous Functions: Rewinds or forwards the tape, until the function is disabled, to the desired location. The arrows on the display show which side of the tape is playing. The up arrow refers to the top side of the tape. The down arrow refers to the bottom of the tape.
Tape Clean Indicator: Reminds the user to clean the cassette head after 30 hours of use.
Compact Disc (CD) Player Function
Power Loading/Unloading: CD is loaded with power assist.Next and Previous Track Selection and Display: The CD player automatically locates the beginning of the next or current (then previous if pressed two times in a row) selection on a CD.
Random Play Button: Automatically plays tracks in a random order selected by a microprocessor in the radio.
Repeat Play Button: Repeats desired track of the CD.
Forward and Reverse Audible Search: Plays the selection many times the normal speed to allow the user to search for a specific portion of a selection.
Compact Disc (CD) Changer/Player Function
CD Changer/Player Controls Integral to Radio: CD changer/player functions are controlled by selecting the mode using the radio head. No remote control is required. CD changer/player functions are displayed on the radio display when the CD/TP button is pressed and an arrow points to the CD changer/player symbol.Seek Up and Down Disc Selection and Display: Use radio pushbuttons to select any CD in the CD changer/player.
Next and Previous Track Selection and Display: The CD changer/player automatically locates the beginning of the next or previous selection on a CD.
Fast Forward and Rewind Audible Search: The CD changer/player plays the selection many times the normal speed to allow the user to search for a specific portion of a selection.
Random Play Button: Automatically plays tracks in a random order selected by a microprocessor.
Repeat Play Button: Repeats desired track of CD.
Auto Compression Feature: Brings soft and loud passages into a more desirable listening range.
6 CD Direct Loaded CD Magazine: Does not contain any CD trays to break or lose. Refer to "Handling the Compact Disc Magazine" in this service manual.
Base Speaker System: Extended Range Speaker (ERS) | |
| 4 +/- 10% @ 400 Hz |
| 15 Watts |
| 75 Hz +/- 15% |
| 89 dB +/- 2 dB |
Uplevel speaker System: Coaxial (COAX) | |
| 4 ohms+/- 10% |
| 20 Watts |
| 75 Hz +/- 15% |
| 90 dB +/- 2 dB |
Customer Tips
How To Enjoy FM Stereo
| • | Select Stations Within Range - The best FM fidelity will be obtained from stations within a 16-64 km (10-40 mile) range. Beyond that range "noise" or "flutter" may begin to appear due to the "line of sight" range limitations of FM signals. |
| Solution: Reduce treble response by moving the treble control to a lower setting in fringe areas. |
| • | Realize Tall Structures Can Interfere - Tall buildings or hills may cause "shadows" or cancellation of FM signals. This is similar to the "ghost" or "flutter" effect seen on television sometimes when airplanes are flying in the vicinity. It will sound like a "pop" or momentary "hiss." |
| Solution: Reduce the treble to a lower setting. |
| • | Interference From Another Station -- Although the circuits in receivers are the most advanced available, there are rare instances where a station being listened to will be interfered with by another station. This only happens when the stations are on almost the same frequency and certain geographical criteria are present. |
| Solution: Select another station or switch to tape. |
Handling The Compact Disc Magazine
Care Of Compact Disc Magazine
| • | Do not put the CD magazine in a place where it will be exposed to high temperatures or direct sunlight. |
| • | Do not knock the CD magazine against anything. |
| • | Never insert anything other than CDs into the CD magazine. |
| • | Never insert a CD with a label or tape attached to it. |
| • | Do not use an 8-cm CD without a special 8-cm (3-in) disc adapter, not available through Saturn Service Parts. |
| • | The use of benzene, thinner, insecticide, or other volatile chemicals may damage the CD magazine surface. Clean only with a clean, damp, soft, lint-free cloth and a mild, neutral detergent. |
Extra Magazines
Extra CD magazines are available through Saturn Service Parts.
Removing CD Magazine From CD Changer/Player
To eject the CD magazine from the CD changer/player, slide the CD changer/player door all the way open until it locks with a click. Press the CD changer/player eject button. The CD changer/player will load the last played CD back into the CD magazine, and the CD magazine will automatically eject.
Loading CD Magazine Into CD Changer/Player
- After the desired number of CDs are installed in the CD magazine, insert the CD magazine with arrow pointing toward the arrow on the CD changer/player.
- Close the door of the CD changer/player by sliding it closed until it clicks.
- The CD changer/player will then begin checking CDs in the CD magazine. The initialization period lasts for approximately 20 seconds, depending on the number of CDs loaded. If a CD has been loaded incorrectly, it could take up to 60 seconds to initialize.
Cleaning The CD Changer/Player
Important: Keep the CD changer/player door closed whenever possible to prevent dirt, dust, or debris from getting inside.
Cleaning the CD changer/player is not recommended. The CD lens is very sensitive to scratches. If one small abrasive particle is accidently brushed across the lens, the CD changer/player will no longer operate.Cleaning The Radio Faceplate
To clean the radio faceplate, use a water-damped cloth with a mild soap to remove the dirt. Do not use any harsh cleaners or chemicals as they may cause irreversible damage.
Notice: If sun tan lotion, hand lotion, or hand cleaner is on the radio, it will soften the paint, and the paint will eventually begin to peel. Inform the customer to not get suntan lotion, hand lotion, or hand cleaner on the radio. If lotion or cleaners are on the radio, wipe it off immediately.
Handling The Compact Discs
Care Of Compact Discs
| • | Handle CDs carefully. Touch only outer edges of CD or edge of hole in center of CD. Never touch glossy side, non-printed silver side. Avoid touching signal surface of CD because thick fingerprints and scratches will interrupt the readout. |
| • | Store CDs in their original protective cases or other protective cases. Store CDs away from sunlight, dirt, dust, and debris. |
| • | Do not attach a label or tape to a CD. |
| • | Always check for scratches and signs of wear on both sides of the CD. |
| • | Never mark outside rim with green or blue marker. |
| • | Make sure to clean the CDs periodically. If the surface of a CD is dirty or has fingerprints on it, clean it with a clean, damp, soft, lint-free cloth and a mild, neutral detergent. Wipe the CD in a straight line from the center hole outward toward edge. Avoid using cleaning solutions which may damage the CD: chemical cleaning cloth, benzene, thinner, spray, etc. |
Inserting Compact Discs Into CD Magazine
- CD is label side up
- CD magazine is numbered 1-6 from bottom to top
Load up to six CDs, label side up, in the CD magazine. The order the CDs are played is from the bottom of the CD magazine to the top, unless in RDM mode. If you look closely, one of the sides of the magazine shows the numbering of the slots 1-6.
Important: If all the CDs in the magazine are loaded incorrectly, no CDs will be played. The CD changer/player will play only those CDs loaded correctly.
| • | Insert one CD in one of the six slots of CD magazine with label-side of CD facing up. |
| • | CDs can be loaded in any order you wish. |
| • | The label side of the CD must face upward. If a CD is loaded label side down, the CD changer/player will not be able to recognize the CD. The upside down CD will be skipped and the next higher available CD will be played. |
| • | Do not touch the recorded surface of a CD when inserting or removing the CD. |
| • | If the CD has been suddenly moved from cold to warm surroundings, playing a CD will not be possible until the moisture evaporates. Let the CD changer/player warm up. |
Removing Compact Discs From CD Magazine
- CD magazine release lever
- CD with label side facing upward
After removing the magazine from the CD changer/player, hold down CD magazine release lever and pull CDs out. The CD magazine release lever is located on the vertical side of the CD magazine, that the horizontal arrow points to. Do not drop the CDs.
