Denon PMA-50 User manual

START::|ado5OThcFCVVM/p3xSvHkA==|jF1SOWQ43U0oyZ13Tk/VQLWAlKMzNudrmAaMcsIWdbo=|MjYjNNdC8HBfYFh61zBIaQ==|::END
MODEL JP E3 E2 EK EA E1 E1C E1K
PMA-50
P P P
INTEGRATED AMPLIFIER
S1114V03DM/DG1508
Ver. 3
• Please use this service manual with referring to the operating instructions without fail.
• Some illustrations using in this service manual are slightly different from the actual set.
• For purposes of improvement, specications and design are subject to change without notice.
Please refer to the
MODIFICATION NOTICE.
e
SERVICE MANUAL
e
D&M Holdings Inc.
Copyright 2015 D&M Holdings Inc. All rights reserved.
WARNING: Violators will be prosecuted to the maximum extent possible.

ABOUT THIS MANUAL.............................................................3
What you can do with this manual ............................................3
Using Adobe Reader (Windows version) ..................................4
SAFETY PRECAUTIONS ..........................................................6
NOTE FOR SCHEMATIC DIAGRAM.........................................7
NOTE FOR PARTS LIST ...........................................................7
INSTRUCTIONS FOR HANDLING SEMI-CONDUCTORS AND
OPTICAL UNIT ..........................................................................7
1. Ground for Human Body ......................................................7
2. Ground for Workbench.........................................................7
TECHNICAL SPECIFICATIONS................................................9
DIMENSION .............................................................................10
PRECAUTIONS DURING SERVICE .......................................11
Initializing This Unit .................................................................11
Service Jig ..............................................................................11
DISASSEMBLY........................................................................12
1. MAIN ASSY.........................................................................14
2. FRONT ASSY......................................................................16
3. NFC PCB ............................................................................17
4. SIDE COVER ......................................................................18
5. BOTTOM COVER ...............................................................19
SPECIAL MODE .....................................................................20
Special mode setting button....................................................20
1. Version Check mode..........................................................21
2. Display / LED check mode .................................................21
3. Protection Check mode......................................................22
5. Owner’s Manual described initialization mode (User Reset)23
JIG FOR SERVICING ..............................................................24
PROCEDURE AFTER REPLACING THE MICROPROCESSOR,
ETC ..........................................................................................25
Firmware Update Procedure..................................................26
1. Procedure for upgrading IC214..........................................26
TROUBLE SHOOTING............................................................34
1. OLED dosen't light ..............................................................34
2. No Sound, Noise generated................................................35
2.1. COMMON(signal).............................................................35
2.2. COMMON(Power, Control signal line) .............................36
2.3. Analog In .........................................................................37
2.4. USB In..............................................................................38
2.5. Blutooth In ........................................................................38
2.6. Optical / Coaxial In ...........................................................38
MEASURING METHOD AND WAVEFORMS .........................39
BLOCK DIAGRAM...................................................................43
POWER DIAGRAM..................................................................44
WIRING DIAGRAM..................................................................45
PRINTED CIRCUIT BOARDS..................................................46
SCHEMATIC DIAGRAMS (1/11).............................................49
MAIN_ADSP ...........................................................................49
SCHEMATIC DIAGRAMS (2/11).............................................50
MAIN_DSP-USB_B.................................................................50
SCHEMATIC DIAGRAMS (3/11).............................................51
MAIN_DIR_FPGA ...................................................................51
SCHEMATIC DIAGRAMS (4/11).............................................52
MAIN_MCU .............................................................................52
SCHEMATIC DIAGRAMS (5/11).............................................53
AMP_D_AMP ..........................................................................53
SCHEMATIC DIAGRAMS (6/11).............................................54
AMP_POWER.........................................................................54
SCHEMATIC DIAGRAMS (7/11).............................................55
AMP_D_AMP_OUT.................................................................55
SCHEMATIC DIAGRAMS (8/11).............................................56
AMP_D_AMP_SW_HP_OUT_AUXIN.....................................56
SCHEMATIC DIAGRAMS (9/11).............................................57
AMP_DAMP_FEEDBACK.......................................................57
SCHEMATIC DIAGRAMS (10/11)...........................................58
FRONT....................................................................................58
SCHEMATIC DIAGRAMS (11-1/11)........................................59
SMPS 1/2 ................................................................................59
SCHEMATIC DIAGRAMS (11-2/11)........................................60
SMPS 2/2 ................................................................................60
EXPLODED VIEW ...................................................................61
PACKING VIEW .......................................................................62
SEMICONDUCTORS ...............................................................63
1. IC's .....................................................................................63
2. DISPLAY ............................................................................82
CONTENTS
2

Jump to the target of a schematic
diagram connector
Click the Ref. No. of the target connector in the red
box around a schematic diagram connector.
•The screen jumps to the target connector.
•Pagemagnicationstaysthesameasbeforethe
jump.
CP401
CP106
v
ABOUT THIS MANUAL
Read the following information before using the service manual.
What you can do with this manual
Search for a Ref. No. (phrase)
(Ctrl+Shift+F)
You can use the search function in Acrobat Reader
to search for a Ref. No. in schematic diagrams, block
diagrams, and parts lists.
1.Press Ctrl+Shift+Fonthekeyboard.
• The Search window appears.
2.EntertheRef.No.youwanttosearchforinthe
Search window, and then click the Search button.
•A list of search results appears.
3.Click an item on the list.
• The screen jumps to the page for that item, and the
searchphraseisdisplayed.
Ctrl
Shift
F
3

Using Adobe Reader (Windows version)
• Properties
Click this button and check that the printer is set to a
suitable paper size.
• Page to print
Select the following checkbox.
"More Options" : "Current View"
• Page Sizing & Handling
Select the following checkbox.
"Size" / "Size Options" : "Fit"
Add notes to this data (Sign)
TheSignfunctionletsyouaddnotestothedatain
this manual.
Savetheleonceyouhavenishedaddingnotes.
[Example using Adobe Reader X]
On the "View" menu, click "Sign".
• The Sign pane appears.
[Example using Adobe Reader 9]
On the "Document" menu, click "Sign".
Magnify schematic / printed wiring
board diagrams - 1
(Ctrl+Space, mouse operation)
Press Ctrl+Spaceonthekeyboardanddragthe
mousetoselecttheareayouwanttoview.
• Theselectedareaismagnied.
• Whenyouwanttomovetheareashown,hold
down Space and drag the mouse.
• Whenyouwanttoshowafullpageview,press
Ctrl+0onthekeyboard.
Ctrl Space
0
Print a magnied part of the manual
ThePropertiesdialogboxandfunctionswillvarydependingonyourprinter.
1. Dragthemousetomagnifythepartyouwanttoprint.
2. On the "File" menu, click "Print".
3. CongurethefollowingsettingsinthePrintdialogbox.
4. Click the Print button to start printing.
4

Magnify schematic / printed wiring
board diagrams - 2
(Pan & Zoom function)
ThePan&Zoomfunctionletsyouseewhichpartof
amagnieddiagramisbeingshowninaseparate
window.
[Example using Adobe Reader X]
On the "View" menu, point to "Zoom", and then click
"Pan & Zoom".
• The Pan & Zoom window appears on the screen.
[Example using Adobe Reader 9]
On the "Tools" menu, point to "Select & Zoom", and
then click "Pan & Zoom Window".
Magnify schematic / printed wiring
board diagrams - 3
(Loupe Tool function)
TheLoupeToolfunctionletsyoumagnifyaspecic
part of a diagram in a separate window.
[Example using Adobe Reader X]
On the "View" menu, point to "Zoom", and then click
"Loupe Tool".
• The Loupe Tool window appears on the screen.
[Example using Adobe Reader 9]
On the "Tools" menu, point to "Select & Zoom", and
then click "Loupe Tool Window".
5

SAFETY PRECAUTIONS
The following items should be checked for continued protection of the customer and the service technician.
leakage current check
Beforereturningthesettothecustomer,besuretocarryouteither(1)aleakagecurrentcheckor(2)alinetochassis
resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the
power cord is less than 460 kohms, the set is defective.
Be sure to test for leakage current with the AC plug in both polarities, in addition, when the set's power is in each state
(on,offandstandbymode),ifapplicable.
CAUTION Please heed the following cautions and instructions during servicing and
inspection.
◎Heed the cautions!
Cautions which are delicate in particular for servicing
are labeled on the cabinets, the parts and the chassis,
etc. Be sure to heed these cautions and the cautions
described in the handling instructions.
◎Cautions concerning electric shock!
(1) AnACvoltageisimpressedonthisset,soifyou
touch internal metal parts when the set is energized,
youmaygetanelectricshock.Avoidgettingan
electricshock,byusinganisolatingtransformer
and wearing gloves when servicing while the set is
energized,orbyunpluggingthepowercordwhen
replacing parts, for example.
(2) Therearehighvoltagepartsinside.Handlewith
extra care when the set is energized.
◎Caution concerning disassembly and
assembly!
Through great care is taken when parts were
manufacturedfromsheetmetal,theremaybeburrson
theedgesofparts.Theburrscouldcauseinjuryifngers
are moved across them in some rare cases. Wear gloves
toprotectyourhands.
◎Use only designated parts!
Theset'spartshavespecicsafetyproperties(re
resistance,voltageresistance,etc.).Besuretouseparts
which have the same properties for replacement. The
burrs have the same properties. In particular, for the
importantsafetypartsthatareindicatedbythezmark
on schematic diagrams and parts lists, be sure to use
the designated parts.
◎Be sure to mount parts and arrange the wires
as they were originally placed!
Forsafetyseasons,somepartsusetapes,tubesorother
insulatingmaterials,andsomepartsaremountedaway
from the surface of printed circuit boards. Care is also
takenwiththepositionsofthewiresbyarrangingthem
andusingclampstokeepthemawayfromheatingand
highvoltageparts,sobesuretoseteverythingbackas
itwasoriginallyplaced.
◎Make a safety check after servicing!
Check that all screws, parts and wires removed or
disconnected when servicing have been put back in their
original positions, check that no serviced parts have
deteriorate the area around. Then make an insulation
check on the external metal connectors and between
the blades of the power plug, and otherwise check that
safetyisensured.
(Insulationcheckprocedure)
Unplug the power cord from the power outlet, disconnect
the antenna, plugs, etc., and on the power. Using a 500V
insulation resistance tester, check that the insulation
resistancevaluebetweentheinplugandtheexternally
exposedmetalparts(antennaterminal,headphones
terminal,inputterminal,etc.)is1MΩorgreater.Ifitis
less, the set must be inspected and repaired.
Manyoftheelectricandthestructuralpartsusedinthe
sethavespecialsafetyproperties.Inmostcasesthese
propertiesaredifculttodistinguishbysight,andtheuse
ofreplacementpartswithhigherratings(ratedpower
andwithstandvoltage)doesnotnecessarilyguarantee
thatsafetyperformancewillbepreserved.Partswith
safetypropertiesareindicatedasshownbelowonthe
wiring diagrams and the parts list in this service manual.
Be sure to replace them with the parts which have the
designated part number.
(1) Schematicdiagrams.......Indicatedbythez mark.
(2) Partslists.......Indicatedbythezmark.
The use of parts other than the
designated parts could cause electric
shocks,resorotherdangerous
situations.
CAUTION Concerning important
safety parts
6

NOTE FOR PARTS LIST
1.Partsindicatedby"nsp" on this table cannot be supplied.
2.Whenorderingapart,makeacleardistinctionbetween"1"and"I"(i)toavoidmis-supplying.
3.Apartorderedwithoutspecifyingitspartnumbercannotbesupplied.
4.Partindicatedby" ★" mark is not illustrated in the exploded view.
WARNING:Partsindicatedbythezmarkhavecriticalcharacteristics.UseONLYreplacementpartsrecommendedbythemanufacturer.
NOTE FOR SCHEMATIC DIAGRAM
WARNING:
Partsindicatedbythezmarkhavecriticalcharacteristics.UseONLYreplacementpartsrecommendedbythemanufacturer.
CAUTION:
Beforereturningthesettothecustomer,besuretocarryouteither(1)aleakagecurrentcheckor(2)alinetochassisresistancecheck.If
the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the set
is defective.
WARNING:
DONOTreturnthesettothecustomerunlesstheproblemisidentiedandremedied.
NOTICE:
ALLRESISTANCEVALUESINOHM.k=1,000OHM/M=1,000,000OHM
ALLCAPACITANCEVALUESAREEXPRESSEDINMICROFARAD,UNLESSOTHERWISEINDICATED.PINDICATESMICRO-MICRO
FARAD.EACHVOLTAGEANDCURRENTAREMEASUREDATNOSIGNALINPUTCONDITION.CIRCUITANDPARTSARESUBJECT
TOCHANGEWITHOUTPRIORNOTICE.
INSTRUCTIONS FOR HANDLING SEMI-CONDUCTORS AND OPTICAL UNIT
Electrostaticbreakdownofthesemi-conductorsoropticalpickupmayoccurduetoapotentialdifferencecausedby
electrostatic charge during unpacking or repair work.
1. Ground for Human Body
Besuretowearagroundingband(1MΩ)thatisproperlygroundedtoremoveanystaticelectricitythatmaybe
chargedonthebody.
2. Ground for Workbench
Besuretoplaceaconductivesheetorcopperplatewithpropergrounding(1MΩ)ontheworkbenchorothersurface,
wherethesemi-conductorsaretobeplaced.Becausethestaticelectricitychargeonclothingwillnotescapethrough
thebodygroundingband,becarefultoavoidcontactingsemi-conductorswithyourclothing
<Incorrect>
CBA
Grounding Band
Conductive Sheet or
Copper Plate
1MΩ
1MΩ
<Correct>
CBA
7

Personal notes:
8

nAudio section
• Output performance
Rated output: both channels driven
25 W+25 W (8 Ω/ohms, 1 kHz, T.H.D. 0.1 %)
50 W+50 W (4 Ω/ohms, 1 kHz, T.H.D. 1.0 %)
Output connectors: Speaker: 4-16 Ω/ohms
Headphones: Φ6.3 mm jack
Total harmonic distortion: 0.004 % (Digital in, Rated output -3 dB, 8 Ω/ohms, 1 kHz)
S/N ratio: 110 dB (Digital in, 25 W, 8 Ω/ohms, 1 kHz, IHF-A)
• Digital input signal
Audio formats: Digital audio interface (Linear PCM)
Coaxial input: 0.5 Vp-p/50 Ω/ohms
Optical input: More than ? 27 dBm
Wavelength: 660 nm
• Input performance
Input sensitivity / Input impedance: AUX: 0.13 V / 22 kΩ/kohms
nBluetooth section
Communication system: Bluetooth version 3.0
Transmission power: Maximum 2.5 mW (Class2)
Maximum communication range: Approx. 32.8 ft/10 m in line of sight *
Frequency band: 2.4 GHz band
Modulation method: FHSS (Frequency-Hopping Spread Spectrum)
Supported profiles: A2DP 1.3/AVRCP 1.5
Supported codecs: aptX Low Latency/AAC/SBC
*The actual communication range varies depending on the inuence of such factors as obstructions between devices, electromagnetic waves from
microwave ovens, static electricity, cordless phones, reception sensitivity, antenna performance, operating system, application software etc.
nGeneral
Power supply: E3 AC120 V, 60 Hz
E2 AC230 V, 50/60 Hz
Power consumption: 35 W
Power consumption in standby mode: 0.2 W
For purposes of improvement, specications and design are subject to change without notice.
TECHNICAL SPECIFICATIONS
9

7 7/8 (200) 15/64 (6)
3 5/32 (80)
3 25/64 (86)
15/64
(6)
6 1/16 (154)
1 3/16
(30)
6 11/16 (170)
29/32
(23) 29/32
(23)
9 29/64 (240)
10 5/32 (258)
45/64
(18)
10 5/32 (258)
1 37/64
(40)
DIMENSION
Unit : in. (mm)
Weight : 2.5 kg
10

Initializing This Unit
Initialize this unit if you have replaced the microprocessor, one of the parts around the microprocessor, or the digital PCB.
1. When power is switched to standby.
2. Hold down buttons "SOURCE" button at the same time and press the "POWER" button to turn on the power.
3. This unit returns to the nomal operation after "INITIALIZE" is displayed for 3seconds.
Service Jig
When you update the rmware , you can use the following JIG (RS232C to internal connector conversion adapter without
7P FFC kit ).
Please order it from Denon Ofcial Service Distributor in your region if necessary.
8U-210100S (SPK-581) : WRITING KIT (without FFC) : 1
606050028012P : 7P FFC(1.0)L=240 : 1
(See 26 page)
When you repair the printing board, you can use the following JIG (Extension UNIT kit).
8U-110084S : EXTENSION UNIT KIT : 1
Insulation sheet (Not supplied) : 1
Ground lead (Not supplied) : 1
(See 24 page)
NOTE: • All user settings will be lost and the factory setting will be recovered after the set is initialized.
So make sure to note down your setting beforehand for restoring after the initialization.
The protection history is cleared at the same time as the initialization.
Power operation button (X)
PRECAUTIONS DURING SERVICE
11

DISASSEMBLY
• Remove each part in the order of the arrows below.
• Reassemble removed parts in the reverse order.
• Read "Precautions During Work" before reassembling removed parts.
• If wire bundles are removed or moved during adjustment or part replacement, reshape the wires after completing the
work. Failure to shape the wires correctly may cause problems such as noise.
FRONT ASSY
See "DISASSEMBLY
2. FRONT ASSY
and "EXPLODED VIEW"
FRONT PCB
(Ref. No. of EXPLODED VIEW : P1)
HP PCB
(Ref. No. of EXPLODED VIEW : P3)
SIDE COVER ASSY
See "DISASSEMBLY
４. SIDE COVER
and "EXPLODED VIEW"
(Ref. No. of EXPLODED VIEW : 16, 36)
TOP COVER
See "DISASSEMBLY
1. MAIN ASSY
and "EXPLODED VIEW"
(Ref. No. of EXPLODED VIEW : 11)
MAIN ASSY
See "DISASSEMBLY
1. MAINT ASSY
and "EXPLODED VIEW"
MAIN PCB
(Ref. No. of EXPLODED VIEW : P8)
GUIDE F PCB
(Ref. No. of EXPLODED VIEW : P2)
AMP PCB
(Ref. No. of EXPLODED VIEW : P7)
SMPS PCB
(Ref. No. of EXPLODED VIEW : P6)
BOTTOM COVER ASSY
See "DISASSEMBLY
５. BOTTOM COVER
and "EXPLODED VIEW"
(Ref. No. of EXPLODED VIEW : 26)
NFC PCB
See "DISASSEMBLY
3. NFC PCB
and "EXPLODED VIEW"
NFC PCB
(Ref. No. of EXPLODED VIEW : P5)
12

Explanatory Photos for“ DISASSEMBLY”
• The angles from which the photos are taken are shown by “Photo angle: A, B, C, D“ .
• See the diagram below about the shooting direction of each photograph.
• Photographs with no shooting direction indicated were taken from the top of the set.
• The photograph is PMA-50E1C.
The viewpoint of each photograph
(Shooting direction) Top view
Shooting direction: E
(Right side)
Shooting direction: C
(Top side)
Shooting direction: B
(Rear side)
Shooting direction: D
(Bottom side)
Shooting direction: A
(Front side)
Shooting direction: F
(Left side)
13

1. MAIN ASSY
Proceeding : TOP COVER →MAINT PCB, GUIDE F PCB, AMP PCB, SMPS PCB
1.1. MAIN PCB
(1) Remove the screws.
(2) Slide to the back side of top panel and remove to lift from the bottom.
(3) Remove the MAIN PCB.
Remove the connector wire and the FFC. And remove the Board to Board connector.
TOP
bottom
View from the top
FFC
CN503
Board to Board
CN16
Loose
MAIN PCB
Cut
Shooting direction: B
(Rear side)
Shooting direction: E
(Right side)
Rear side
Front side
14

1.2. GUIDE PCB AMP PCB
(1) Remove the screws. Remove the GIDE PCB.
(2) Remove the screws.
(3) Remove the screws. Remove the GUIDE INLET BOARD and COVER. Remove the AMP PCB.
View from the top
CN9030
CN221
Loose
AMP PCB
Loose
Shooting direction: B
(Rear side)
Rear side
Front side
15

1.3. SMPS PCB
(1) Remove the screws and connector wire. Remove the SMPS PCB.
2. FRONT ASSY
Proceeding : TOP COVER →WINDOW →FRONT PANEL
(1) Put the driver in the position of arrow. Remove the window panel.
Caution: Wrap protective tape, etc. around the tip of a sharp precision screwdriver to prevent the tip of the screwdriver
from damaging or scratching this unit.
Do not reuse window panel after disassembly.
View from the top
CN801
Rear side
Front side
16

(2) Remove the screws.
(3) Remove the screw of earth lag wire. Remove the FRONT PANEL ASSY.
3. NFC PCB
Proceeding : TOP COVER →MAIN, SMPS PCB →FRONT ASSY →NFC PCB
(1) Remove the screws. Remove the guide of PCB and remove the NFC PCB.
Left side
Rear panel
Shooting direction: E
(Right side)
Shooting direction: B
(Rear side)
17

4. SIDE COVER
Proceeding : TOP COVER →MAIN, AMP, SMPS PCB →FRONT ASSY →SIDE COVER
(1) Remove the screws. (Left Side)
(2) Remove the screws. (Right Side)
(3) Slide the side panel and pull up from the bracket.
Rremove the same both left and right.
Shooting direction: E
(Right side)
Shooting direction: F
(Left side)
18

5. BOTTOM COVER
Proceeding : TOP COVER →MAIN, AMP, SMPS PCB →FRONT ASSY →SIDE COVER →BOTTOM
COVER
(1) Remov the screws. Remove the BOTTOM PANEL.
View from the top
Rear side
Front side
19

SPECIAL MODE
Special mode setting button
No.1 - 3 :When the power is in standby mode, hold down buttons A and B and press the power button to turn on the power.
No.4 : Hold down button A and connect the power cord to an outlet.
No.5 : When the power is in standby mode, hold down button A and connect the power cord to an outlet.
No. Mode Button A Button B Contents
1 Version Check Source Bluetooth Displya the version. System u-com, FPGA, USB, BT and Bluetooth
address.
2 Display / LED check Source Bluetooth Test of display.
3 Protection History Source Bluetooth Displaying and clearing the protection history.
4Initialization for the
factory Power - Initialize factory setting.
5
Owner’s Manual
described
initialization
Source -
This operation is described Owner's Manual.
This initialization, except for the following two points are the same as
the factory initialization.
It is not clear the protection of history.
Mode No.1-3 changes each time the button "Source" is pressed.
To exit the special mode disconnect the adapter plug.
Power operation button (X)
Bluetooth button
Input source select button
Protection circuit indicator
20