Philips FX20 User manual

© Copyright 2014 WOOX Innovations Limited.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system
or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise
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registered trademarks of Koninklijke Philips N.V. and are used by WOOX Innovations Limited
under license from Koninklijke Philips N.V.
Subject to modification
Version 1.1
TABLE OF CONTENTS
Page
Location of PC Boards & Versions Variation ........................1
Specifications .......................................................................2
Safety Instruction ..................................................................3
Software Upgrade Instruction..................................................4
Troubleshooting....................................................................5
Disassembly Instructions .....................................................6
Set Block & Wiring Diagram................................................. 7
Circuit Diagram & PCBA Layout...........................................8
Revision List........................................................................10
Set Mechanical Exploded View .......................................... 9
Mini Speaker
FX20/55/X78/X77
Published by Arya & Kelly WK1419
3140 038 61871

1
PCB Board Locations
Inside the front panel
On the bottom plate
VERSION VARIATIONS
Type / Versions
Service Policy /55 X/78 X/77
CCC
Board in used
FX20
MAIN BOARD
C
C
C
CCC
CCC
CCC
CCCTOUCH BOARD
MAIN
BOARD
POWER BOARD
FRONT CONTROL BOARD
BLUETOOTH BOARD
C
C
C
NFC BOARD C C C
IN BOARD M M M
KEY BOARD M M M
USB BOARD M M M
TOUCH
BOARD
USB
BOARD
M
M
M
MMM
MMM
＊Tips：
LOADER C -- Component Lever Repair
M -- Module Lever Repair
SUPPORT BOARD
FRONT CONTROL BOARD
IN BOARD
USB BOARD
NFC BOARD
POWER BOARD
SUPPORT BOARD
KEY BOARD
MAIN BOARD
LOADER

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1. Introduction
1.1 Purpose and Scope of Document
TheProduct Performance Specificationis the leading specification and is the response of development. Whenever the
specification cannot be met, Product Management is to be informed as early as possible in order to make sure the
marketing can respond in time.
This Product Performance Specificationdoes not cover software specifications. Software is described in
the URS documents and in the version matrix owned by Product Management. Product Management is
responsible for maintaining, distributing and updating the version matrix.
All changes to Product Performance Specificationhave to be submitted via Change Proposals. Changes
have to be marked in bold and/ or colours in the document for easy recognition in at least the update right
after the change. Deletion of text is done by strike through in order to make changes obvious in at least the
update after the change took place.
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2. General Information and Requirement
2.1 Product Family Features
2.1.1 Identity and Key Features
FX20 FX30 FX50 is a MiniAudio Systemthat incorporates CD player with USB and Tuner FM/AM, and Blue
Tooth support.
Elements to include as generic requirements:
1. Safety certification (cUL/FCC and CB/EMC/CE)
Following is a list of key features:
1. BT module:BM830
2. MCU: STM8S005C6T6 LQFP48
3. CD disc /USB/MP3 MPEG (Sunplus SPH8104)
4. FM/AM tuner Module:KST-MW004MV1-R78W2 IC : RN5B800
5. Audio DSP:STA311B
6. AMP:FX20 STA518*2; FX30STA516B*2 STA516BE*2; FX50STA516B*4
7. Rated output power
10% THD*
2
30% THD(max total
output power)*1
FX20 4x60W
280W(4X70W)
300W(4X75W)
FX30 4x150W 720W(4X180W)
FX50 4x250W 720W(4X300W)
*1 --- test at Audio in and AUX mode
*2 --- the output power tolerance is ±0.5dB
2.1.2 Styling, Forms and Functions
FX20 FX30FX50 can be placed on a tabletop which should have a form factor and footprint that can be
easily be located in a 2nd room such as in thebedroom or small study room.
Features Products FX20 FX30 FX50
Stroke versions All
Design Refer to MUS[3] for
details
Refer to MUS[3] for
details
Refer to MUS[3] for
details
Front
Optical Drive Loading Tray Tray Tray
Tray Location below below below
Tray Orientation HORIZONTAL HORIZONTAL HORIZONTAL
VFD UP UP UP
Dimension Height of feet 3mm 3mm 3mm
Apparatus tray closed
W x D x H (mm)
Tbcmm (include rear
connectors)
Tbcmm (include rear
connectors)
Tbcmm (include rear
connectors)
Weight Main set 3.1kg tbc tbc
speaker 4.4kg tbc tbc
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Features Products FX20 FX30 FX50
Stroke versions All
Cosmetics Color Black Black Black
Buttons Black Black Black
2.1.3 ACCESSORIES
Model FX20 FX30FX50
Stroke Version 55
Region LATAM
Power Cord 1.2m
Audio cable
(3.5mm audio) NA
Tuner Antenna Pig tail for FM
AM Antenna loop-antenna
for AM
Speaker cable
na
USB cable NA
Remote Control 21keys
Battery 1xAAA
2.1.4 Controls, Local Display and LED Indications
Control keys on the set are:
1. Standby-On
2. Source(Disc, BT, USB, FM, AM, MP3_Link,Aux)
3. Play/Pause
4. Stop
5. Preset-
6. FB
7. FF
8. Preset+
9. Eject
10. Max sound
11. Bass Boost
12. EQ
13. USB Record
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14. Volume Knob
No LED ndicate for power off
.
2.2 Mechanical General Information
The productappearances and functions are defined in their respective MUS. Product management
approves the MUS and it is a leading document where product appearance is applicable.
Please refer to Sh560 for mechanical information.
2.3 Safety Standards
Where applicable:
/12, /05 – EN-60065:2002 (Edition 7.0) +A1 +A11 +C11 +C12, UL-6500:2006 (Edition 2), other strokes IEC-
60065:2005 (Edition 7.1), or
/12, /05 – EN-60950:2006 +A1, /37 – UL-60950 (Edition 2), /55 /79 /97 (other strokes than /12, /05, /37) –
IEC-60950 +A1 (Edition 2)
2.4 EMC Requirements
Where applicable:
/12 – Audio functions: EN55013:2001; +A1:2003, +A2:2006, EN55020:2007
IT-functions: EN55022:2006,+A1:2007, EN55024:1998, +A1:2001, +A2:2003
WiFi-function: ETSI EN 300 328 (V1.7.1.), ETSI EN 301 489-1 (V1.8.1.) & -17 (V1.3.2), EN
62311:2008
Generic functions: EN 61000-3-2:2006, EN 61000-3-3:1995; +A1:2001; +A2:2005 or alternatively
EN61000-3-3:2008
/97 (/55) – Audio functions: CISPR-13:2006 (or alternatively CISPR-13:2009), CISPR-20:2005;
IT-functions: CISPR-22;2008, CISPR-24:1997; +A1:2001, +A2:2002; IEC 62311:2007
Generic functions: IEC 61000-3-2:2005,+A1:2008,+A2:2009 or alternatively IEC 61000-3-2:2009, IEC
61000-3-3:2008
/37 – FCC-15.247 (Part B, C), OET Bulletin 65, Edition 97-01 Table 1; RSS-210 Issue 7
Where applicable:
For /12(EU), /05(UK), /51(Russia) EN/IEC 60065 7th Edition
For /37 (US, Canada) UL 60065
For /55 (LATAM), /78 (Brazil) IEC 60065 7th Edition
For /98 (AP), /69 (Singapore), /75 (Australia) IEC 60065 7th Edition
For /93 (China) GB 8898 (IEC 60065 7th Edition)
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For /61 (Korea) K 60065 6th Edition
For /96 (Taiwan) CNS 14408 (IEC 60065 7th Edition)
2.5 ESD Requirements
The product shall withstand electro static discharges on all user accessible parts of the product.
Reference: IEC61000-4-2.
For contact discharges:
Level General (kV) USA (kV) Requirement
1 0-2 0-3 No deviations allowed.
2 >2-4 >3-4 Short perceptible deviations allowed.
3 >4-5 >4-5 Normal recallable functions function changes allowed.
4 >5-7 >5-7 Control recallable functions function changes allowed.
5 8 8 Components damage not allowed.
For air discharge:
Level General (kV) USA (kV) Requirement
1 0-4 0-6 No deviations allowed.
2 >4-8 >6-8 Short perceptible deviations allowed.
3 >8-10 >8-10 Normal recallable functions function changes allowed.
4 >10-15 >10-15 Control recallable functions function changes allowed.
5 15-18 >15-18 Components damage not allowed.
General requirement:
1. 10 arcs for positive and negative polarity for unit “on” and “off” for 1kV incremental steps.
2. Component or mechanical damage is not allowed. No loss of fixed stored data (stored in EEPROMs).
3. Hang-ups and malfunctions are allowed, as long as the customer can “recover” from the hang-up by
pressing theStandby or ON/OFF button of the set.
4. Failures that disappear only by unplugging the AC mains cord and/orpower sources are not acceptable.
2.6 Environmental Condition
The environmental condition requirements and test method is according to UAN-D1590.
Ambient temperature : max. 40 °C - all climates
Apparatus acc. to spec. : +5 to + 35 °C
Vibration test (acc. IEC 60 068/2/6) : operational vibration test to be proceeded in operating position of the
set.
2.7 Quality
PQR-class: class Ⅲaccording toBLC A&MA PQR handbook V2.1 (2006-10-02)
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Lifetime: 7 years
Tested According to: General Test Instruction UAN-D 1591
Measured According to: UAN_L 1059 unless otherwise stated
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3. Technical Specifications
3.1 Power Supply
3.1.1 Type and versions
3.1.1.1 Main set
Build-inSMPS will be used for all models and stroke versions.
Versions Region/Country SMPS Detachable mains cords
10 EUROPE / UK
230~240Vac nom.
Frequency: 50Hz.
EU (/12) round 2-pin & UK (/05) 3-pin
37 NAFTA 90~132Vac limit.
Frequency: 60Hz.
UL flat pin (polarized)
FX20/55
FX30/55 LATAM 90~240Vac
Frequency: 50/60Hz.
INMETRO certified round 2-pin
FX30/55
FX50/55 LATAM
90~132Vac & 220-240Vac
selectable
Frequency: 50/60Hz.
INMETRO certified round 2-pin
98 APAC
90~132Vac & 220-240Vac
selectable
Frequency: 50/60Hz.
EU round 2-pin
94 India
2) 100 ~310Vac limit (India
compatible with up cost) used
only for India.
Frequency: 47~63Hz.
EU (/12) round 2-pin
All requirements per defined for each country should be met with sufficient testing.
3.1.2 Surge Immunity (Lightning Test)
The product shall withstand mains interference’s of:
Differential mode:
•2kV/2 ohm criteria C for Europe.
•6kV/12 ohm criteria C for NAFTA.
Parameters:
•Bi-wave
•Open circuit voltage: 2/50us
•Short circuit current: 8/20us
•From +/1kV to +/-2kV (for Europe) or +/-6kV (for Nafta) in steps of 1kV.
•10 shots per combination.
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•One shot per minute.
•Serial impedance: 2 Ohm for Europe, 12Ohm for Nafta.
•Polarity and phase: Positive (phase 90º) & Negative (phase 270º)
Common mode:
•6kV/2 ohm criteria C for Europe.
•6kV/12 ohm criteria C for Nafta.
Parameters:
•Ring-wave (100kHz)
•From +/3kV to +/-6kV in steps of 1 kV.
•10 shots per combination.
•One shot per minute.
•Serial impedance: 2 Ohm for Europe, 12Ohm for Nafta
•Polarity and phase: Positive (phase 90º) & Negative (phase 270º)
Reference: IEC61000-4-5 and for USA: 3135 019 8029 Reliability evaluation.
Requirements:
•Apparatus should fulfil the leakage current requirements of IEC60065 point 9.1.1 (UAN-D1631)
•Defects or permanent deviations are not allowed.
3.1.3 Mains Drop-out Immunity
The product shall withstand mains failures of:
•Variation 0%(=100% dip) at T-event = 50 mSec. Performance criterion B
•Variation 40%(=60% dip) at T-event = 100 mSec. Performance criterion B
•Variation 0%(=100% dip) at T-event = 5 Sec. Performance criterion C
Additional for USA apparatus: See 3135 019 8029 Reliability evaluation.
•Variation 0%(=100% dip) at T-event = 100 mSec in standby mode. Performancecriterion B
Requirement:
No misoperation and no interference of user in order to guarantee continuation of performed function.
Reference: IEC61000-4-11 For measuring method refer to UAN-D1724, as far as applicable.
Performance criterions according to IEC61000-4-4 Amendment 1
Performance Requirement
Criterion A - No any degradation of specification.
Criterion B - Temporary degradation / self recoverable.
Criterion C - No damage, resolvable hang-up.
Criterion D - Not recoverable loss of function.
3.1.4 Power Consumption
Power consumption at nominal AC input:
1. Docking mode at 1/8 P-rated output power : FX20 ≤W
FX30≤W
FX50 ≤W
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2. Low Power Standby Mode : ≤0.5 W
3.2 Audio
3.2.1 Analog Audio Input/Outputs
Gerneral Part
Output Stage
Protection:
NA Temperature : Yes Short Circuit: Yes
Indicators
Standby Mode Indicator: Clock Display Active
Power Standby Mode: LED Turns Off
Electrical Data
DSC: NA Channel Difference: ±3dB
DBB: NA Hum (Volmin --- Volma
x
-20dB 200nW
Bass: Y Residual Noise(Volume Minimum) 60nW
Treble: Y Channel Seperation: 1kHz/10kHz 40dB/35dB
Loudness: Y THD,Maximal <1%
SNR @standard output(A-weighted)(
*
1
): normal
≥70dB
limit
≥67dB
SNR @standard output(Un-weighted):
≥65dBA
≥60dB
Crostalk: ≥45dB
Amplification Reserve 1dB
Audio Inputputs
Audio Input Sensitivity(±3dB) rated output power at 1kHz Audio Output(*1)
Tuner FM 67.5kHz, Modulation (Limit:-6dB) Line Out(Left/Right) NA
CD/MP3 0dB track (Audio Disc 1, Track 1) Headphone NA
USB 0dB 1KHz sinewave( 2.0HS)
AUX1(back) 2V±100mV; Rin≥22kΩ
MP3_link(front) 1V±100mV; Rin≥22kΩ
Output
Power(*1)
At THD=10%, 1kHz/10kHz Sinewave
Main Operation for FX series/ all
version (rms)
FX20 FX30 FX50
CD/USB/BT/Aux/Audio In 4x60W±10%0.5dB 4x150W±10%0.5dB 4x250W±10%0.5dB ( At Cold Condition
with 10% THD,)
Tuner 4x55W±10%
4x24W±0.5dB 4x140W±10% 4x60W±0.5dB 4x240W±10% 4x100W±0.5dB ( At Cold Condition
with 10% THD,)
Audio_in (3.5mm)/AUX 4x75W±10%0.5dB 4x180W±10%0.5dB 4x300W±10%0.5dB ( At Cold Condition
with 30% THD*2,)
Frequency Response
Woofer
55Hz-5KHz 50Hz-5KHz 250Hz-20kHz
Tweeter 5KHz-20KHz 5KHz-20KHz -
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Speaker driver
Impedance:
Right/Left: FX20 ---8Ωwoofer+8 Ωtweeter;FX30 ---4Ωwoofer+4 Ωtweeter;FX50 --- 3Ω
woofer+3 Ωtweeter
Subwoofer:
REMARKS:
Electrical Parameters are to be measured at Speaker Terminals across rated impedance Loadwith Rated
Input Signalin CD Mode setting in DBB/Loudness Off and Pre-eq at Flat unless specified otherwise.
3.3 Bluetooth
Gerneral Part
Bluetooth module Sunitec_BM153
BT Specification
Operating Frequency Band 2.4GHz ~ 2.48GHz unlicensed ISM band
Operating Voltage 1.8V / 3.3V
RF Output Power Class 2(3dBm) 0dBm
Sensitivity at 0.1% BER -90dBm -70dBm
Bluetooth version Ver2.1 + EDR
Receive A2DP: 1.2
Transmit A2DP: 1.2 
Receive HSP NA
Bluetooth Flashing
Display
BT Audio
Description Normal Limited unit remark
Frequency Response 80 Hz ~16kHz +/‐3dB dB
S/N (Unweighted)
S/N (A-weighted) 67 65 dBA
Channel Separation 45 35 dB
THD + Noise ( 0dB, 1Khz ) <1%
Bluetooth at Set Level
10%THD OUTPUT POWER(EQ:FLAT) FX20 60W
FX30 150W
FX50 250W
W
Connected distance 10 8 meter
NFC
Connected distance
Normal:2.5cm Limit:2CM1CM CM
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3.4TUNER
FM/AM tuner Module: KST-MW004MV1-R78W2 IC : RN5B800
GENARAL PART
WAVE RANGE VERSION TOLERANCE TUNING GRID
FM 87.5 – 108.00 MHz /05/12 QUARTZ PRECISION 50kHz
AM 530 -1700kHz /55/37 QUARTZ PRECISION 10 kHz
AERIAL
FM : PIGTAILTYPE ANT WIRE 75Ω
AM :FRAME ANT. 18.1 uH with shielding
ELECTRICAL DATA
A.M Nom Limit Unit FM Nom Limit Unit
- 3 dB Limiting Point 20 26 dBf
Search Tuning Sensitivity(at stereo
mode) 35 41
Amplification Reverse - 2 -4 dB Search time digital tuning
system. - 100 S
AGC Figure of Merit 30 25 dB
Distortion ( RF 50mV, M 80% ) 3 5 % IF 10.7 MHz
IF 450 ± 3 kHz Stereo - 46 dB Quieting 48 51 dB
Modulation Hum 50 45
Search Tuning Sensitivity α26 +/-10 dB S/N Ratio 50 45
S/N Ratio 45 40 dB Amplification Reverse 0 -4 dB
Distortion ( RF 1mV, Frq Dev.75
kHz ) 2 3 %
Overall Frequency Response: 63Hz
– 12.5KHz - ±3 dB
Channel separation:400 / 1000 /
5000 Hz. RF input: 68 dBf
26/30/
20
20/26/
18 dB
FM Frequency (MHz) Noise Limited
Sensitivity 26 dB
Image
Rejection IF Rejection Large Signal Handling
FM Nom. 18 116 dBf
88.0 Lim. 22 108 dBf
FM Nom. 18 116 dBf
98.0 Lim. 22 108 dBf
FM Nom. 18 116 dBf
107.0 Lim. 22 108 dBf
Units dBf dB dB dBf
AM Frequency (KHz) Noise Limited
Sensitivity 26 dB
Image
Rejection IF Rejection Large Signal Handling
MW Nom. 70 1000
610KHz Lim. 75 500
MW Nom. 65 1000
1000KHz Lim. 73 500
MW Nom. 65 1000
1440 kHz Lim. 73 500
Units dBuV dB dB mV/m
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Remark: AM Performance based on the field test result
Susceptibility to unwanted
signals(CPU,SMPS,AMP,DSP …):
Limite
d(dB)
Normal
(dB) Remark
-15dB -20dB Refer to selfpollution curve
3.3 Infra Red Receiver
Parameters Requirement
Receiver Sensitivity
Receiver sensitivity
•E(0°) = 0.70 mW/m2
•E(30°,h) = 1.12 mW/m2, γ= ±30°
off horizontal or vertical axis
•E(45°,h) = 2.19 mW/m2, γ= ±45°
off horizontal axis
Max Distance
10m
7.92m
5.65m
Short Operating Distance ≤0.1 m
Minimum Optical Viewing Angle Horizontal ( γ) ≥± 60°
Vertical ( δ) ≥± 30°
Electromagnetic Interference Field-strength: Eq≤100 V/m at nominal 36KHz carrier
frequency.
Refer to Appendix A for the remote control code.
3.4 Clock SPECIFICATION
TECHNIAL DESCRIPTION
SOFTWARE IMPLEMENTED CLOCK / TIMER FUNCTION WITH 32.768kHz QUARTZ OSCILLATOR.
GENERAL PART
Timer Setting : Clock and Timer
Timer Wakeup Mode : CD/USB/Tuner
Remarks Time Setting : /12 version for 24hrs /37 version for 12hrs
Volume at Wakeup : 12 level Volume
No of Alarm Timer Settings : 1 Alarm timer,
Clock Accuracy : Nom : 1 sec/day Limit : 2 sec/day
INDICATORS
Display Type : VFD
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REMARKS:
3.5 MECHANICAL
3.5.1 Shock Sensitivity
Refer to Quality plan for the details of the test discs and testing method.
Requirement:
No muting, plop sounds, picture freeze/jerk or audible/visible interference when impacting with force of -
In the ±X and ±Y directions: F ≥ 3g / 3ms, ΔV = 0.06ms
In the ± Z direction: F ≥ 2g / 3ms, ΔV = 0.04ms
Where g = acceleration due to gravity.
3.5.2 Thermal Performance
Refer to Quality plan for the details of the testing method.
Requirements:
1. Set should function normally
2. Temperature rise of accessible parts such as metallic enclosures (casing) shall not exceed 40˚C
above the ambient temperature.
3. Temperature rise of PCB prints shall not exceed 85˚C
4. Temperature readings of all mechanical / electrical components and modules shall not exceed their
specification limits. The calculated junction temperature of semiconductors shall also not exceed
spec limits.
3.5.3 Noise Specifications
Test Conditions:
Measurements are to be made inside an Anechoic Chamber (echo-free environment) with ambient noise of
less than 16dBA.
Measurements are to be taken at the following positions: -
(a) Top-Surface and at center of Front-Cabinet
(b) Front-Surface and at center of Front-Cabinet.
The microphone is to be positioned 10cm from abovementioned surfaces.
Set Functional State Requirement
Normal
Idle State Standby Mode < 20 dBA
Set On and "No Disc" mode < 20 dBA
Tray Open/Close Start/End peak noise < 65 dBA
Tray running noise (RMS) < 50 dBA
CDDA & SACD --- SBC442 < 35 dBA
(Stereo & Multichannel) Play (first & last tracks) <30dBA
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Search Forward & Backward (all speeds) <33dBA
Pause (first & last tracks) < 28dBA
Jump Forward (first to last track) < 38 dBA
Jump Backwards (last to first track) < 38dBA
Hum or hiss noise Audible noise from speaker < 30dBA
Fan noise <34dBA
4. VERSIONS OVERVIEW
Ver Region
APPROBATION Tuner AC SUPPLY
MIC
MIX
MATRIX
SURR.
SPK
Safety EMC Range Step
AERIAL
SOCKET AERIAL MAINS VOL TAGE
FIXED
CORD
'/55 EN60065 CISPR 13
FM 87.5-
108MHz
MW 531-
1602kHz
or 530-
1710kHz
50kHz
9kHz
10kHz
110-127V
Switched
220 - 240V
50/60Hz
2-14

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SolderJoint
3

TheGuideofSoftwareOperationforPhilipsMiniFXSeries

TheSoftwareUpgradeway(UpdatesoftwareviaUSB):
1.>DownloadtheSoftwareintotherootdirectoryofaUSBstoragedevice.
2.>Renamethedownloadsoftwarefile,suchasrenamethe
"PCM_MCU_V12.bin"to"PCM_MCU.bin“.
3.>TurnontheunitandswitchtotheUSBsource.‐‐>"NOUSB"isdisplayed.
4.>ConnecttheUSBstoragedevicetotheUSBsocketontheunit.‐‐>"MCUUPD"(MCUupdate)is
displayed.
5.>Press""keytostartupgrade.‐‐>"UPGING"(upgrading)isdisplayedduring
upgrade.Atcompletionofupgrade,theunitrebootsautomatically.
6.>Deletethe"PCM_MCU.bin"intheUSBstoragedevice,andrepeatstep1.>/2.>/3.>/4.>/5.>to
upgradeMPEGS/W,Renamesoftwarefile,suchasrename
"PCM_MPEG_FX20_55_V13.bin"to"PCM_MPEG.bin".‐‐>"MPEGUPD"isdisplay.
Caution:
DonotturnoffthepowerorremovetheUSBstoragedevicewhenthesoftwareupdateisin
progressbecauseyoumightdamagetheunit.


TheSoftwareVersiontoview:
1.>TurnontheunitandswitchtotheDISCsource.‐‐>"NODISC"isdisplayed.
2.>Press"EJECT"keytoopenthedoor.‐‐>"OPEN"isdisplayed.
3.>PressthekeySTOP( )‐>PROG‐>NEXT( )inturnonRC.‐‐>theVFDwillshowsuchas
"M1220P13".
Note:Whenviewsoftwareversiontype,VFDcanbeshowbelowinformation,eg:
M0820P16
M08:MCUversion
20:FX20model,ifthisunitis15/25/30/50/55,meanisFX15/FX25/FX30/FX50/FX55model.
P16:Mpegversion.


Restoredefaultsettings:
Youcanalsorestorethedefaultsettingsoftheunit.
Turnontheunit,inanysource,pressandholdboththekey andPRESET‐onthefrontpanel
formorethanthreeseconds.‐‐>Afterawhile,"RESETOK"isdisplayed.Then,theunitreboots
automatically.


4

5-1 Trouble shooting Chart
Yes No
Yes
Yes
Power on Doesn't Work
Go NO
Yes
Check the 3.3V voltage of MCU
Yes
Yes
No
Confirm the normality SPI
communications of MPEG
Adapter has problem
Check the 22V voltage of XP1 and
XP8
Check 9pin and 24pin of MCU
and confirm whether they have normal
voltage
Confirm whether there are DVCC33 and
VC12
NO Check the VCC5V out from
DC-DC
No
MPEG has problem
Check VFD board and key board

5-2 Trouble shooting Chart
Yes NO
Q13 has problem
Can’t read USB or
USB has no sound
Go
Yes
Check the normality of the
communication
b
etween MPEG and USB
NO
No
Yes
MPEG has problem
Check the 5V voltage of XP14 Confirm whether there is 5V
voltage of S pin of Q13
NoNoNN