
PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan
PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
PIONEER CORPORATION 2015
MVH-280FD/XNEW5
RDS MEDIA CENTER RECEIVER
MVH-280FD/XNEW5
MVH-X285FD/XNES
ORDER NO.
CRT5787
K-ZZZ SEPT. 2015 Printed in Japan

SAFETY INFORMATION
CAUTION
Where in a manufacturer’s service documentation, for example in circuit diagrams or lists
of components, a symbol is used to indicate that a specific component shall be replaced only
by the component specified in that documentation for safety reasons, the following symbol shall
be used:
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair
complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so
and refer the repair to a qualified service technician.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replaced only with the same or equivalent type recommended by the manufacturer.
Discord used batteries according to the manufacturer's instructions.
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MVH-280FD/XNEW5

CONTENTS
SAFETY INFORMATION .....................................................................................................................................2
1. SERVICE PRECAUTIONS ................................................................................................................................4
1.1 SAFETY PRECAUTIONS...........................................................................................................................4
1.2 NOTES ON DISASSEMBLY / ASSEMBLY .................................................................................................4
1.3 NOTES ON REPLACING PARTS...............................................................................................................4
1.4 NOTES ON ADJUSTMENT........................................................................................................................4
1.5 OTHERS.....................................................................................................................................................4
2. SPECIFICATIONS.............................................................................................................................................5
2.1 SPECIFICATIONS ......................................................................................................................................5
2.2 DISC/CONTENT FORMAT .........................................................................................................................5
3. BASIC ITEMS FOR SERVICE ..........................................................................................................................5
3.1 CHECK POINTS AFTER SERVICING .......................................................................................................5
4. BLOCK DIAGRAM ............................................................................................................................................6
4.1 BLOCK DIAGRAM......................................................................................................................................6
4.2 POWER BLOCK DIAGRAM .......................................................................................................................7
5. DIAGNOSIS ......................................................................................................................................................8
5.1 OPERATIONAL FLOWCHART...................................................................................................................8
5.2 ERROR CODE LIST...................................................................................................................................9
5.3 CONNECTOR FUNCTION DESCRIPTION .............................................................................................11
5.4 FUSE CHECK...........................................................................................................................................12
6. SERVICE MODE.............................................................................................................................................13
6.1 DISPLAY TEST MODE 1 ..........................................................................................................................13
6.2 DISPLAY TEST MODE 2 ..........................................................................................................................14
6.3 SOFTWARE VERSION UP METHOD......................................................................................................15
7. DISASSEMBLY ...............................................................................................................................................16
8. EACH SETTING AND ADJUSTMENT............................................................................................................18
8.1 PCL OUTPUT CONFIRMATION...............................................................................................................18
9. EXPLODED VIEWS AND PARTS LIST ..........................................................................................................18
1 PACKING ..................................................................................................................................................19
9.
9.2 EXTERIOR ...............................................................................................................................................21
10. SCHEMATIC DIAGRAM................................................................................................................................23
10.1 TUNER AMP UNIT (VEHICLE I/F PART) ...............................................................................................23
10.2 TUNER AMP UNIT (SYS REGULATOR PART)......................................................................................24
10.3 TUNER AMP UNIT (SUPPLY FOR POWER PART)...............................................................................25
10.4 TUNER AMP UNIT (OTHER SUP PART)...............................................................................................26
10.5 TUNER AMP UNIT (SYSTEM U-CON PART) ........................................................................................27
10.6 TUNER AMP UNIT (I/F I-POD PART) ....................................................................................................28
10.7 TUNER AMP UNIT (EVOL PART) ..........................................................................................................29
10.8 TUNER AMP UNIT (LITHIO PART) ........................................................................................................30
10.9 TUNER AMP UNIT (S11_6I/F MECHA VD PART) .................................................................................31
10.10 TUNER AMP UNIT (EXTERNAL I/F PART) .........................................................................................32
10.11 TUNER AMP UNIT (POWER AMP IC PART).......................................................................................33
10.12 KEYBOARD UNIT ................................................................................................................................34
11. PCB CONNECTION DIAGRAM....................................................................................................................35
11.1 TUNER AMP UNIT .................................................................................................................................35
11.2 KEYBOARD UNIT ..................................................................................................................................37
12. ELECTRICAL PARTS LIST ...........................................................................................................................39
MVH-280FD/XNEW5
3

1. SERVICE PRECAUTIONS
You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and
should keep the safety during servicing by following the safety instructions described in this manual.
Please keep the distance of more than 13 cm from focus lens for safety when you check pickup and make adjustment,
and do not look straight at Laser Beam for more than 10 seconds.
Before disassembling the unit, be sure to turn off the power. Unplugging and plugging the connectors during power-on
mode may damage the ICs inside the unit.
Please be sure to conduct line process to original status if you make assembling after repair.
Be careful in handling ICs. Some ICs such as MOS type are so fragile that they can be damaged by electrostatic
induction.
Please be careful of not to apply static charge onto integrated circuits, etc, when you conduct repair work.
Especially, please use soldering iron with its tip grounded.
Also, please use a pair of tweezers with static charge protection capability if there is the possibility of contacting to
device terminals, and avoid the use of metal-made tweezers.
Some of the adjustment is required when the part is replaced.
Pease refer to “8. EACH SETTING AND ADJUSTMENT”.
For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit.
Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for
repairs accompanied by reworking of soldering.
Notes on soldring
1.1 SAFETY PRECAUTIONS
1.2 NOTES ON DISASSEMBLY / ASSEMBLY
1.3 NOTES ON REPLACING PARTS
1.4 NOTES ON ADJUSTMENT
1.5 OTHERS
4
MVH-280FD/XNEW5

For all items except the backup current, refer to the Owner's Manual.
Backup current......................... 5.0 mA or less
demrifnocebotmetIserudecorP.oN
1 Confirm whether the customer complain has
been solved.
If the customer complain occurs with the
specific media, use it for the operation check.
The customer complain must not be
reappeared.
Display, audio and operations must be
normal.
2 FM/AM tuner Check FM/AM tuner action.
(Seek, Preset)
Switch band to check both FM and AM.
Display, audio and operations must be
normal.
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receiving it for service.
Item to be checked regarding audio
2. SPECIFICATIONS
2.1 SPECIFICATIONS
2.2 DISC/CONTENT FORMAT
3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
To keep the product quality after servicing, please confirm following check points.
See the table below for the items to be checked regarding audio:
Distortion
Noise
Volume too low
Volume too high
Volume fluctuating
Sound interrupted
MVH-280FD/XNEW5
5

5. DIAGNOSIS
Vcc = 1.2 V
PVcc = 3.3 V
BSENS
Pin 90
ASENS
Pin 89
DSENS
Pin 34
BSENS = L
DSENS = L
Starts
communication
with Grille
microcomputer.
VOUT5 <- H
Pin 1(IC201)
Source keys
operative
Source ON
SYSPW <- H
Pin 2
300 ms
300 ms
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 300 msec, the oscillator
may be defective.
Completes power-on operation.
(After that, proceed to each source operation)
Power ON
ASENS = L
Vcc : Pin 12, 20, 43, 78, 86, 109
PVcc : Pin 3, 16, 28, 36, 48, 69, 82,101, 112
5.1 OPERATIONAL FLOWCHART
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MVH-280FD/XNEW5

Common
AMP ERROR
USB device/iPod
FORMAT READ
Sometimes there is a delay between the
start of playback and when you start to
hear any sound.
– Wait until the message disappears and
you hear sound.
NO AUDIO
There are no songs.
– Transfer the audio files to the USB
device and connect.
The connected USB device has security
enabled.
– Follow the USB device instructions to
disable the security.
SKIPPED
The connected USB device contains
DRM protected files.
– The protected files are skipped.
PROTECT
All the files on the connected USB
device are embedded with DRM.
– Replace the USB device.
N/A USB
The connected USB device is not
supported by this unit.
– Disconnect your device and replace it
with a compatible USB device.
HUB ERROR
The USB device connected via a USB
hub is not supported by this unit.
– Connect the USB device directly to this
unit using a USB cable.
CHECK USB
The USB connector or USB cable has
short-circuited.
– Check that the USB connector or USB
cable is not caught in something or
damaged.
The connected USB device consumes
more than maximum allowable current.
– Disconnect the USB device and do not
use it. Turn the ignition switch OFF
and back to ACC or ON. Connect only
compliant USB devices.
The iPod operates correctly but does
not charge.
– Make sure the connection cable for
the iPod has not shorted out (e.g., not
caught in metal objects). After
checking, turn the ignition switch OFF
and back to ON, or disconnect the
iPod and reconnect.
This unit fails to operate or the speaker
connection is incorrect; the protection
circuit is activated.
– Check the speaker connection.
– Check the power IC and its peripheral circuit.
NO XXXX (NO TITLE, for example)
There is no embedded text information.
– Switch the display or play another
track/file.
ERROR-19
Communication failed.
– Perform one of the following
operations, then return to the USB
source.
• Turn the ignition switch OFF and
back to ON.
• Disconnect the USB device.
• Change to a different source.
iPod failure.
–Disconnect the cable from the iPod.
Once the iPod’s main menu is
displayed, reconnect the iPod and
reset it.
ERROR-23
USB device was not formatted properly.
– Format the USB device with FAT12,
FAT16 or FAT32.
ERROR-16
The iPod firmware version is old.
– Update the iPod version.
iPod failure.
– Disconnect the cable from the iPod.
Once the iPod’s main menu is
displayed, reconnect the iPod and
reset it.
STOP
There are no songs in the current list.
– Select a list that contains songs.
NOT FOUND
No related songs.
– Transfer songs to the iPod.
5.2 ERROR CODE LIST
MVH-280FD/XNEW5
9

STN DELETED
The operation was disabled.
– Run the same command for another
station.
STATION FULL
A new station cannot be added.
– Delete an old station to open a spot
for a new one.
CAN.T DELETE
The station could not be deleted.
– Run the same command for another
station.
NO NETWORK
The connected device is out of area.
– Connect the device to a network.
NO SERVICE IN THIS COUNTRY
The connected device is out of area.
– Connect the device to a network.
START UP APP
The application has not started running
yet.
– Operate the mobile device to start up
the application.
Apps
INOPERABLE
The operation was disabled.
– Run the same command for another
track.
TRY LATER
Unable to save thumb rating.
Unable to save BookMark.
Unable to add station.
– Try again later.
MAINTENANCE
Pandora system is undergoing
maintenance.
– Try again later.
SKIP LIMIT
Due to music licensing restrictions,
Pandora limits the total number of skips
per hour.
– Wait until Pandora allows you to skip
again.
UPDATE APP
This version of the Pandora application
is not supported.
– Connect a device that has a
compatible version of the Pandora
application installed.
LOGIN ERROR
Your Pandora account is not logged in.
– Disconnect the cable from the device,
and log in to your Pandora account.
Then reconnect the device.
CHECK DEVICE
Device error message displayed in the
Pandora application.
– Check the connected device.
PLEASE CREATE A STATION ON THE
PHONE
No station found.
– Create a station in the Pandora
application on your connected device.
SELECT STN
No station selected.
– Select a station.
Pandora
ERROR-19
Communication failed.
– Disconnect the cable from the device.
Once the device’s main menu is
displayed, reconnect the device and
reset it.
START UP APP
The Pandora application has not started
running yet.
– Start up the Pandora application.
10
MVH-280FD/XNEW5

5.4 FUSE CHECK
No sounds and display output of external unit (the condition when the fuse is blown)
This product may receive excessive current if the power line connection of the
external product is incorrect, such as Ground connection failure.
The fuse P1203 on TUNER AMP UNIT is used to protect this product from this
excessive current.
Even though fuse is blown, the sounds of Pre-out output and AUX input are output
properly and also other functions work correctly.
However, you cannot turn on the external product connected to this product as
the power is not supplied if the fuse is blown.
(The symptom in this case is the sounds of external product are not
output on this product when the external product is connected on a vehicle.)
If you find the symptoms above, check if the fuse is not blown.
If you replace to a new fuse and the fuse is blown again (you cannot turn on the
power of external product), check the power connection (Ground) of external product.
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MVH-280FD/XNEW5

6.2 DISPLAY TEST MODE 2
* Initial
condition
$ PD number
For Ver.7.01, "701" is displayed
For PEA010A, "010A" is displayed
# System
microcomputer
version
S
$$$$
###
On (state when
entering test mode)
Press and hold "1" and "3" buttons together, and turn BUP and ACC on.
[Operation key]
[How to enter Test mode]
[Test items]
Start display test mode.
Press and hold "1" and "3" buttons together, and turn
BUP and ACC on.
Display is normally updated
Display update is stopped
Product operation is performed as usual, in appearance.
The screen gets still when entering this item.
On (an initial value)
On (lighting condition
of normal times)
On (an initial value or
setting value of default
menu)
On (an initial value or
setting value of default
menu)
On (an initial value or
setting value of default
menu)
Off
All off
All off
All off
Remarks
Key Illumination
Operation key Processing
Icon
Enter display test mode 2
Switch display status
The information such as the system microcomputer version is checked.
System Version information is displayed.
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MVH-280FD/XNEW5