Sony UDA-1 User manual

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
UDA-1
SPECIFICATIONS
USB DAC AMPLIFIER
9-893-834-02
2013J33-1
© 2013.10
US Model
Canadian Model
AEP Model
UK Model
Chinese Model
Taiwan Model
Ver. 1.1 2013.10
AUDIO POWER SPECIFICATIONS (US and Canadian models)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 4 ohm loads, both channels driven, from 20 - 20,00 0 Hz; rated
20 watts per channel minimum RMS power, with no more than 10% total
harmonic distortion from 250 milliwatts to rated output.
Amplifier section (US, Canadian and Taiwan models)
Reference Power Output
23 W + 23 W (4 ohms, 1kHz, THD 10%)
Rated Power Output
20 W + 20 W (4 ohms, 20 Hz - 20 kHz, THD 10%)
Speaker impedance match
4ohms-16ohms
S/N ratio
LINE IN: 100 dB (short-circuit input, 20 kHz LPF, A Network)
USB IN: 100 dB (20 kHz LPF, A Network)
Frequency response
10 Hz - 100 kHz (+0 dB, –3 dB) (4 ohms, LINE IN)
Input section (digital)
USB REA R (USB-B jack)
USB 2.0 compatible
Supported format
PCM (Sa mpling frequency: 44 .1 k/ 48 k/ 88 .2 k/ 96 k/ 176.4 k/
19 2 kHz , d ata bit length: 16 / 24/3 2 bits)
DSD (2.8 M/ 5.6 MHz)
USB FRONT (USB-A jack)
USB 2.0 compatible
Supported format
PCM (Sa mpling frequency: 32 k/ 44.1 k/ 48 kHz,
data bit length: 16 bits)
COAXIAL jack
Input impedance: 75 ohms
Supported format
PCM (Sa mpling frequency: 32 k/ 44 .1 k/ 48 k/ 8 8.2 k/ 96 k/ 176. 4 k/
19 2 kHz, data bit leng th: 16 / 24 b its)
Amplifier section (AEP, UK and Chinese models)
Reference Power Output
23 W + 23 W (4 ohms, 1kHz, THD 10%)
Rated Power Output
20 W + 20 W (4 ohms, 1kHz, THD 0.9%)
Speaker impedance match
4ohms-16ohms
S/N ratio
LINE IN: 100 dB (short-circuit input, 20 kHz LPF, A Network)
USB IN: 100 dB (20 kHz LPF, A Network)
Frequency response
10 H z - 10 0 k H z ( +0 dB, –3 dB) (4 ohms, LINE IN)
OPTICAL jack
Supported format
PCM (Sampling frequency: 32 k/44.1 k/48 k/88.2 k/96 kHz, data
bit length: 16/2 4 bits)
Input section (analog)
Input se nsitivity: 500 mV
Input impedance: 100 kilohms
Output section
LINE OUT
Output voltage: 2 V
Output impedance: 2.2 kilohms
2 Hz - 80 kHz (–3 dB)
PHONES
17 mW + 17mW (8 ohms, THD 1%)
55 mW +55 mW (32 ohms, THD 1%)
170 mW + 170 mW (300 ohms, THD 1%)
General and others
Power requirements
AC 120 V 60 Hz (US, Canadian and Taiwan models)
Power consumption
On: 65 W
During standby mode: 0.3 W
Dimensions (approx.) (w/h/ d)
225 mm × 74 mm × 262 mm (8 7/8 inch × 3 inch × 10 3/ 8 inch)
including projecting parts and controls
Mass (approx.)
4.0 kg (8 lbs 14 oz)
Supplied accessories
AC power cord (1)
Remote control (RM-ANU182) (1)
USB cable (1)
Quick Start Guide (1)
Reference Guide (1)
Design a nd specifications are subject to change without notice.
Standby power consumption: 0. 3W
AC 220-240 V 50/60 Hz (AEP, UK and Chinese models)
iPhone, iPod, iPod classic, iPod nano, and iPod touch are trademarks of
Apple Inc., registered in the U.S.and other countries.
All other trademarks and registered trademarks are of their respective
holders. In this manual, ™ and ®marks are not speci¿ed.
“Made for iPod,” and “Made for iPhone” mean that an electronic accessory
has been designed to connect speci¿cally to iPod or iPhone, respectively,
and has been certi¿ed by the developer to meet Apple performance
standards. Apple is not responsible for the operation of this device or its
compliance with safety and regulatory standards. Please note that the use
of this accessory with iPod or iPhone may a ect wireless performance.
Made for iPod/ iPhone models
The compatible iPod/iPh one models are as follows. Update your iPod/
iPhone with the latest software before using with the unit.
USBworks with:
iPhone
iPhone 5/ iPhone 4S/iPhone 4/ iPhone 3GS/ iPhone 3G
iPod touch
iPod touch (5th generation)/iPod touch (4th generation)/
iPod touch (3rd generation)/iPod touch (2nd generation)
iPod
iPod classic
iPod nano
iPod nano (7th generation)/ iPod nano (6th generation)/ iPod nano (5th
generation)/ iPod nano (4th generation)/ iPod nano (3rd generation)
Other tradem arks and trade names are those of their respective owners.
Cop yrig ht s
Microsoft, Windows, Windows Vista and Windows Media are either
trademarks or registered trademarks of Microsoft Corporation in the
United States and/or other countries.
This product is protected by certain intellectual property rights of
Microsoft Corporation. Use or distribution of such technology outside of
this product is prohibited without a license from Microsoft or an authorized
Microsoft subsidiary.
Mac, Mac OS and iTunes are trademarks of Apple Inc., registered in the
U.S. and other countries.
iOS is a trademark or registered trademarks of Cisco in the U.S. and other
countries and is used under license.
Android and its respective logos are trademarks of Google Inc.

UDA-1
2
NOTES ON CHIP COMPONENT REPLACEMENT
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples
of a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable. (See
Fig. A)
1.5 kΩ0.15 μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
1. SERVICING NOTES ............................................. 3
2. DISASSEMBLY
2-1. Disassembly Flow........................................................... 6
2-2. Panel (Side) L/R Assy..................................................... 6
2-3. Panel (AL) Block, Fuse (F120)....................................... 7
2-4. DCDC Board................................................................... 8
2-5. AMP Board-1.................................................................. 9
2-6. AMP Board-2.................................................................. 10
2-7. SPTM Board ................................................................... 10
2-8. DIGITAL Board Block ................................................... 11
2-9. DIGITAL Board.............................................................. 12
2-10. DAC Board ..................................................................... 12
2-11. AC Inlet (2P) (AC1) ....................................................... 13
2-12. PRIMARY Board............................................................ 13
3. TEST MODE ............................................................ 14
4. TROUBLESHOOTING .......................................... 15
5. DIAGRAMS
5-1. Block Diagram - USB Section - ..................................... 25
5-2. Block Diagram - MAIN Section -................................... 26
5-3. Block Diagram - AMP Section -..................................... 27
5-4. Block Diagram
- PANEL/POWER SUPPLY Section -............................ 28
5-5. Printed Wiring Board - DIGITAL Board -...................... 30
5-6. Schematic Diagram - DIGITAL Board (1/5) -................ 31
5-7. Schematic Diagram - DIGITAL Board (2/5) -................ 32
5-8. Schematic Diagram - DIGITAL Board (3/5) -................ 33
5-9. Schematic Diagram - DIGITAL Board (4/5) -................ 34
5-10. Schematic Diagram - DIGITAL Board (5/5) -................ 35
5-11. Printed Wiring Board - AMP Board - ............................. 36
5-12. Schematic Diagram - AMP Board -................................ 37
5-13. Printed Wiring Board - DAC Board - ............................. 38
5-14. Schematic Diagram - DAC Board -................................ 39
5-15. Printed Wiring Boards - INPUT/OUTPUT Section - ..... 40
5-16. Schematic Diagram - INPUT/OUTPUT Section -.......... 41
5-17. Printed Wiring Boards - FRONT Section -..................... 42
5-18. Schematic Diagram - FRONT Section - ......................... 43
5-19. Printed Wiring Board - DCDC Board - .......................... 44
5-20. Schematic Diagram - DCDC Board - ............................. 45
5-21. Schematic Diagram - PRIMARY Board -....................... 46
5-22. Printed Wiring Board - PRIMARY Board -.................... 47
6. EXPLODED VIEWS
6-1. Panel (Side) Section........................................................ 64
6-2. Front Panel Section......................................................... 65
6-3. AMP Board Section ........................................................ 66
6-4. DIGITAL Board Section................................................. 67
6-5. Chassis Section ............................................................... 68
7. ELECTRICAL PARTS LIST .............................. 69
Accessories are given in the last of the electrical parts list.
TABLE OF CONTENTS
Ver. 1.1

UDA-1
3
SECTION 1
SERVICING NOTES
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
ABOUT THE CONFIRMING OF OPERATIONS
To perform confirming of operations of this unit, it is necessary to
install a USB driver and Hi-Res Audio Player in PC, to connect PC
to this unit, and to perform confirming of operations.
Please refer to the Quick Start Guide for install of USB driver and
Hi-Res Audio Player.
NOTE OF REPLACING THE IC203, IC204, IC402,
IC501 AND IC508 ON THE DIGITAL BOARD
IC203, IC204, IC402, IC501 and IC508 on the DIGITAL board
cannot exchange with single. When this part is damaged, exchange
the complete mounted board.
NOTE OF REPLACING THE IC201 ON THE DIGITAL
BOARD
Replacement of IC201 on the DIGITAL board used in this unit
requires a special tool.
System requirements for computers connected to the USB DAC AMPLIFIER
To output sound played back on a computer via the USB DAC AMPLIFIER, download the
required driver, then install it on your computer.
The following system environment is required to install the driver:
OS
Windows 8 (32 bit/64 bit)
Windows 7 (SP1, 32 bit/64 bit)
Windows Vista (SP2, 32 bit/64 bit)
Windows XP (SP3, 32 bit/64 bit)
(Mac OS X v10.6.8, 10.7.4, 10.8)
Device
USB port (USB 2.0 compliant)
Note
One of the above operating systems should be installed by default. Upgraded operating
systems and multi-boot environments are not supported.
We do not guarantee operation for all computers even if they meet the above system
requirements. Furthermore, the following systems are not supported:
Personally constructed computers or operating systems
Upgraded operating systems
Multi-boot environments
Multi-monitor environments
However, in Mac OS, install the driver is unnecessary.
NOTE OF REPLACING THE IC350 AND IC351 ON
THE AMP BOARD AND THE COMPLETE AMP BOARD
When IC350 and IC351 on the AMP board and the complete AMP
board are replaced, it is necessary to spread the compound between
the IC350, IC351 and the heat sink, chassis and the heat sink.
Description
THERMAL COMPOUND (G747)
Spread the compound referring to the figure below.
– State that removed the heat sink –
–
AMP Board (Component Side) –
– Heat sink bottom –
IC351
IC350

UDA-1
4
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitor (C240 and
C241) to discharge the capacitor (C240 and C241).
– AMP Board (Conductor Side) –
C241
C240
800 :
2 W
800 :
2 W
MODEL IDENTIFICATION
Distinguish by part number on the rear side of a main unit.
Part number
– Rear view –
(US, Canadian, AEP, UK
and Chinese models)
Part number
– Rear view –
(Taiwan model)
Model Part No.
US and Canadian models 4-469-194-1[]
AEP and UK models 4-469-194-2[]
Chinese model 4-469-194-3[]
Taiwan model 4-469-194-4[]
ABOUT THE PROTECTOR FUNCTION
When irregular current is output to the SPEAKERS terminals, or
when the internal temperature of the USB DAC AMPLIFIER is
too high, etc., all the input indicator lamps flash for 5 seconds, and
the USB DAC AMPLIFIER turns off automatically.
All the input indicator lamps flash
• Check the connection of the speakers and then turn the power
on again.
• Check the location of the USB DAC AMPLIFIER, and place
the unit in a location with adequate ventilation so as not to
block the ventilation holes, and then turn the power on again.
ABOUT THE SPECIAL DISPLAY OF LED
USB FRONT lamp is flashes
• When you connect a device that is not compatible with this
function, the USB FRONT lamp flashes slowly. Disconnect
the device.
USB FRONT lamp
flashes slowly
(USB) port
• When an abnormal current is being input to the (USB) port
on the USB DAC AMPLIFIER, the USB FRONT lamp flashes
quickly. Check whether there is a problem with the device con-
nected.
USB FRONT lamp
flashes quickly
(USB) port
COAXIAL or OPTICAL lamp is flashes
• Only the LPCM 2ch audio format can be played when the sig-
nal is input through the COAXIAL or OPTICAL jack. Playing
other formats may produce noise or even damage the speakers
or headphones if played at a high volume. When a signal of
a format not supported is input, the COAXIAL or OPTICAL
input indicator lamp flashes.
COAXIAL lamp flashes
OPTICAL lamp flashes
DSEE lamp is flashes
• When you select an input source or file that is not supported,
the DSEE function cannot be activated. If you press the DSEE
button when the DSEE function cannot be activated, the DSEE
lamp flashes three times.
DSEE lamp flashes three times
Power lamp is flashes
• If the AUTO STANDBY switch is set to “ON”, when you are
not using the USB DAC AMPLIFIER or when there is no sig-
nal input to the USB DAC AMPLIFIER, the USB DAC AM-
PLIFIER is automatically turned off. Before the USB DAC
AMPLIFIER turns off, the power lamp flashes for 1 minute.
Power lamp flashes
Ver. 1.1

UDA-1
5
SERVICE POSITION (COMPONENT SIDE)
SERVICE POSITION (CONDUCTOR SIDE)
DIGITAL board
AMP board
DAC board
SPTM board
PRIMARY board DCDC board
panel (AL) block
DIGITAL board
AMP board
DAC board
SPTM board
PRIMARY board
DCDC board
panel (AL) block

UDA-1
6
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SET
2-2. PANEL (SIDE) L/R ASSY
(Page 6)
2-3. PANEL (AL) BLOCK, FUSE (F120)
(Page 7)
2-4. DCDC BOARD
(Page 8)
2-5. AMP BOARD-1
(Page 9)
2-6. AMP BOARD-2
(Page 10)
2-7. SPTM BOARD
(Page 10)
2-8. DIGITAL BOARD BLOCK
(Page 11)
2-9. DIGITAL BOARD
(Page 12)
2-11. AC INLET (2P) (AC1)
(Page 13)
2-12. PRIMARY BOARD
(Page 13)
2-10. DAC BOARD
(Page 12)
Note: Follow the disassembly procedure in the numerical order given.
2-2. PANEL (SIDE) L/R ASSY
– Rear bottom view –
3two claws
3two claws
3two claws
3three claws
3three claws
3two claws
2Slide the panel
(side) L assy in the
direction of an arrow
and remove the claws.
6panel (side) R assy
4tape
6panel (side) L assy
1screw
(for SILVER: B3 u4)/
(for BLACK: B3 u5)
1screw
(for SILVER: B3 u4)/
(for BLACK: B3 u5)
Note: Please spread a sheet under
a unit not to injure top panel.
4tape
5teflon tape
(sub material)
5teflon tape
(sub material)
2Slide the panel
(side) R assy in the
direction of an arrow
and remove the claws.

UDA-1
7
2-3. PANEL (AL) BLOCK, FUSE (F120)
6Remove the panel (AL) block
in the direction of an arrow.
7Remove the panel (AL) block
in the direction of an arrow.
panel (AL) block
qf panel (AL) block
qg fuse (F120)
9tape
0connector
(CN600)
qa connector
(CN800)
8connector
(CN305)
tape
HP board
F-USB boardFRONT-L board
5claw
5claw
2two screws
(BTP3 u6)
4three screws
(BV3 u8 CU)
3screw
(BVTP3 u6)
Note 1: Please spread a sheet under
a unit not to injure top panel.
Note 2: Arrange the wire from the panel (AL) block
in the arrow direction in order to prevent
pinch to the chassis.
2screw
(BTP3 u6)
1knob (VOL) assy
– Rear bottom view –
– Rear view –
:ire VettiQJ
:ire VettiQJ
tape
hook
tape
FRONT-L
board
FRONT-R
board
Push the wire.
:ire VettiQJ qd teflon tape
(sub material)
qd teflon tape
(sub material)
qs two teflon tapes
(sub material)
qs teflon tape
(sub material)

UDA-1
8
2-4. DCDC BOARD
1Remove the wire from two clamp (L35).
2tape
qa teflon tape
(sub material)
– Rear view –
3connector
(CN191)
4connector
(CN150)
0connector
(CN154)
6connector
(CN190)
7nut
(supplied with RV190)
5connector
(CN153)
8screw
(BVTP3 u6)
9Remove the DCDC board
in the direction of an arrow.
qs DCDC board
DCDC board
tape
clamp (L35)saranet cushion
power transformer (T001)
clamp (L35)
clamp filter (ferrite core)
(FC2)
:LUHVHWWLQJ
:LUHVHWWLQJ
half
half
RV190

UDA-1
9
2-5. AMP BOARD-1
A
1screw
(BVTP3 u6)
2plate (noise)
A
3connector
(CN202)
4connector
(CN201)
5connector
(CN700)
6connector
(CN213)
7connector
(CN215)
8connector
(CN212)
9connector
(CN205)
clamp (L35)
clamp (L35)
clamp (L35) clamp (L35) AMP board
AMP board DIGITAL board
AMP board
DAC board
PRIMARY board
:LUHVHWWLQJ
:LUHVHWWLQJ :LUHVHWWLQJ

UDA-1
10
2-6. AMP BOARD-2
2-7. SPTM BOARD
1two screws
(BV3 u8 CU)
5two screws
(transistor)
6heat sink (E)
(See Note)
2screw
(BVTP3 u6)
2screw
(BVTP3 u6)
2screw
(BVTP3 u6)
2screw
(BVTP3 u6)
3clamp (L35)
0sleeve ferrite clamp
(FC5)
3clamp
(L35)
4Remove the AMP board block
in the direction of an arrow.
7saranet cushion
saranet cushion
F202
F203 8fuse rating label
(AMP)
qa AMP board
AMP board
9saranet cushion
6DUDQHWFXVKLRQVHWWLQJ
Note: When you install the heatsink, spread the compound
referring to “NOTE OF REPLACING THE IC350
AND IC351 ON THE AMP BOARD AND THE
COMPLETE AMP BOARD” on servicing notes
(page 3).
$(38.&KLQHVH
1clamp filter
(ferrite core)
(FC4)
6SPTM board
5four canoe clips
lead pin
SPTM board
lead pin
Install theclamp filter (ferrite core) (FC4)
between the lead pin and the cable tie.
cable tie
SPTM board
DAC board
DAC board
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&ODPSILOWHUIHUULWHFRUH)&DQGZLUHVHWWLQJ
 $(38.&KLQHVH
2Remove the wire
from the lead pin. 3two screws
(BVTP3 u10)
$(38.&KLQHVH
4Remove the SPTM
board block in the
direction of an arrow.
$(38.
Ver. 1.1

UDA-1
11
2-8. DIGITAL BOARD BLOCK
– Rear view –
1connector
(CN304)
2two screws
(BVTP3 u6)
2two screws
(BVTP3 u6)
4two screws
(BVTP3 u10)
3screw
(B3 u5)
DIGITAL board clamp
ferrite clamp (FC3)
Wire setting
5Remove the DIGITAL board block
in the direction of an arrow.
6DIGITAL board block

UDA-1
12
2-9. DIGITAL BOARD
2-10. DAC BOARD
1connector
(CN501)
2connector
(CN306)
3connector
(CN303)
4connector
(CN308)
6clamp
5screw
(BVTP3 u6)
5screw
(BVTP3 u6)
5two screws
(BVTP3 u6)
8DIGITAL board
7bracket (digital)
7bracket (digital)
1two screws
(BVTP3 u6)
2screw
(BVTP3 u10)
1two screws
(BVTP3 u6)
3Remove the DAC board block
in the direction of an arrow.
7DAC board
DAC board
4Cut the cable tie.
cable tielead pin
C465
Note: In reassembling, use new cable tie
to fasten the wire to same as before.
5connector
(CN401)
6ferrite clamp
(FC3)
C464
J400
Press.
WireVeWWiQJ

UDA-1
13
2-11. AC INLET (2P) (AC1)
2-12. PRIMARY BOARD
1Cut the cable tie.
cable tie
2connector
(CN120)
PRIMARY board
WireVeWWiQJ
3two screws
(KTP2 3 u8)
4AC inlet (2P)
(AC1)
AC inlet (2P) (AC1)
Note: In reassembling, use new cable tie
to fasten the wire to same as before.
1connector
(CN110)
2screw
(BVTP3 u6)
2screw
(BVTP3 u6)
5fuse label (T.L)
2screw
(BVTP3 u6)
2screw
(BVTP3 u6)
3clamp (L35)
3clamp (L35)
4Remove the PRIMARY board block
in the direction of an arrow.
6PRIMARY board
(US, Canadian, Taiwan)
Ver. 1.1

UDA-1
14
SECTION 3
TEST MODE
SHIP MODE
It can return to initial setting.
Procedure:
1. Press the [?/1] button to turn the power off.
2. Press and hold (about 4 seconds) the [?/1] button, and all the
LED lights up.
3. Initialization will be completed, then turn the power off.

UDA-1
15
SECTION 4
TROUBLESHOOTING
Check that between the
STBY+5V line and the ground
does not short circuit.
NG
OK
OK
OK
OK
NG
Check that the fuse (F120) on
the PRIMARY board is
correctly inserted, or check
the fuse is not damaged.
Check that voltage of the
following is about 12 V.
PRIMARY board: TP130 or
CN130 pin 6 (UNREG_STBY)
START
Press the [?/1]
button, [?/1] LED
is lighting green.
Check that voltage of the
following is about 5 V.
DCDC board: CL170 or
CN150 pin 3 (STBY+5V)
OK
Check that voltage of the
following is about 3.3 V.
DCDC board: CL156 or
CN153 pin 4 (STB+3.3V)
OK
Check that voltage of the
following is “H”.
DIGITAL board: CN305
pin 12 (POWER_LED)
FRONT-L board: CN401
pin 13 (POWER_LED)
– Continued on
page 16 –
Reinsert the fuse (F120) on the
PRIMARY board.
Exchange the fuse (F120) on
the PRIMARY board.
Check the following parts and
the surrounding circuit, and
exchange the defective parts
or board.
FRONT-L board: D412
OK
Check that voltage of the
following is “H”.
PRIMARY board: TP131 or
CN130 pin 5 (PW-RY)
NG NG
OK
Check the T100 (sub power
transformer), RY100 on the
PRIMARY board, or exchange
the PRIMARY board.
Check that the two harnesses
are correctly inserted in CN153
on the DCDC board and
CN306 on the DIGITAL board,
CN150 on the DCDC board
and CN130 on the PRIMARY
board.
Repair the harness.
NG
Check the following parts and
the surrounding circuit, and
exchange the defective parts
or board.
DIGITAL board: IC306
OK
NG
Check the following parts and
the surrounding circuit, and
exchange the defective parts
or board.
DCDC board: IC150
NG
Exchange the DCDC board.
Check that between the
STB+3.3V line and the ground
does not short circuit.
OK
NG NG Exchange the DCDC board.
And exchange in order of the
DIGITAL, FRONT-L, FRONT-R
boards.
Check the following parts and
the surrounding circuit, and
exchange the defective parts
or board.
DCDC board: IC153
Check that the harness is
correctly inserted in CN305 on
the DIGITAL board and CN401
on the FRONT-L board.
Check the following parts and
the surrounding circuit, and
exchange the defective parts
or DIGITAL board.
DIGITAL board: IC306
NG OK
1. When power is not turned on

UDA-1
16
NG
OK
OK
NG
OK
Check that voltage of the
following is about 5.2 V.
DCDC board: CL154 or
CN153 pin 1, 2 (D5V)
NG
Check that the harness is
correctly inserted in CN305 on
the DIGITAL board and CN401
on the FRONT-L board.
Check the following parts and
the surrounding circuit, and
exchange the defective parts
or DCDC board.
DCDC board: IC151
Check the following parts and
the surrounding circuit.
FRONT-L board: D401 to D405,
D409 to D411, IC402, IC403,
S401, S402
NG
OK
Check the following parts and
the surrounding circuit.
FRONT-R board: D500, D501
Check the following parts and
the surrounding circuit, and
exchange the defective parts
or board.
DIGITAL board: IC306
OK
Press and hold
(about 4 seconds)
the [?/1] button,
and the all LEDs
are lighting (about
2 seconds).
Reinsert the harness.
Repair the harness.
Exchange the defective parts
or FRONT-L board of
problematic part.
NG Exchange the defective parts
or FRONT-R board of
problematic part.
NG
– From page 15 –

UDA-1
17
NG
Check that DC off set voltage
of the following pin is just
about 0 V.
AMP board: CL215
START
Check that the all
input indicator
LEDs are not
blinking (blinking is
protector).
Check that thermistor voltage
of the following pin is 0.5 V to
2.0 V.
AMP board: JL201 or
CN215 pin 9 (TEMP1)
NG
OK
OK
OK
OK
NG
Check that the heat sink and
IC350 and IC351 on the AMP
board is touches completely.
Check that the harness is
correctly inserted in CN215 on
the AMP board and CN303 on
the DIGITAL board.
NG
Repair the harness.
Check the following parts and
the surrounding circuit.
AMP board: TH200
NG Exchange the TH200 on the
AMP board.
Check the following parts and
the surrounding circuit.
AMP board:
Q202, Q203, Q205, Q206
NG
Exchange the AMP board.
NG The screw is fastened so that
a heat sink may be strongly
touched to IC350 and IC351
on the AMP board.
OK
Check that the heat sink and
chassis touches completely.
NG The screw is fastened so that
a heat sink may be strongly
touched to chassis.
Check that the harness is
correctly inserted in CN191
(for fan (M1)) on the DCDC
board.
OK
NG
Exchange in order of the
AMP board, DIGITAL board,
T001 (main power transformer).
Reinsert the harness.
NG
START
Check that the
USB FRONT
indicator LED is
not blinking.
Repair the harness which
connects DIGITAL board
(CN501) and F-USB board
(CN802).
NG
OK
Check that the USB device
that is not compatible with front
USB jack is not connected.
NG
Disconnect the USB device.
NG
Exchange the DIGITAL board.Exchange the F-USB board.
2. When protector happened
3. When USB FRONT indicator LED is blinked

UDA-1
18
NG
OK
Check that the fuses (F200,
F201) on the AMP board are
not damaged.
START
Check that the
sound from the
LINE IN input is
outputted of
speaker.
– Continued on
page 20 –
– Continued on
page 19 –
The volume knob is turned to
the position at ten o'clock.
And check that voltage of the
following is about 0.3 V.
DCDC board: CL193 or
CN190 pin 3 (VR signal)
Check that the two harnesses
are correctly inserted in CN212
on the AMP board and CN401
on the DAC board, CN205 on
the AMP board and CN403 on
the DAC board.
NG Reinsert the harness.
Repair the harness.
OK
OK
OK
OK
OK
NG
NG
Exchange the fuses (F200,
F201) on the AMP board.
Check that voltage of the
following is about 16 V.
AMP board: CL272
Check that voltage of the
following is about 7 V.
AMP board:
CL265 or IC203 pin 2
Check that between the 7 V
line and the ground does not
short circuit.
Check that voltage of the
following is about 16 V.
AMP board: CL214
Exchange the AMP board.
Next, exchange the DAC
board.
open
Check the following parts and
the surrounding circuit.
AMP board:
D202, D204, D207, D209
Check the T001 (main power
transformer)
NG
NG short
Check that between the –7 V
line and the ground does not
short circuit.
Check that voltage of the
following is about –16 V.
AMP board: CL222
Exchange the AMP board.
Next, exchange the DAC
board.
open
Check the following parts and
the surrounding circuit.
AMP board:
D202, D204, D207, D209
Check the T001 (main power
transformer)
NG
Check that voltage of the
following is about –7 V.
AMP board:
CL266 or IC204 pin 2
OK
OK
NG
Check that the pin jack (J400
on the DAC board) terminal
is normal.
Exchange the J400 on the
DAC board.
short
4. When sound is not outputted

UDA-1
19
OK
OK
OK
OK
NG
Check the IC206 (electrical
volume IC).
Check that analog audio signal
is outputted from the following
pins.
AMP board:
C251, C252/IC206 pin 8, 25
NG
Check that power amplifier
voltage of the following is
about +25 V, –25 V.
AMP board: CL270, CL271
Check the following parts and
the surrounding circuit.
AMP board: D218
Check the T001 (main power
transformer)
Check that audio signal of
power amplifier is outputted
from the following pins.
AMP board: CN207
pin 1 (R), 4 (L)
Check that voltage of the
following is “H”.
AMP board: CN215
pin 6 (SP_RY)
Check that voltage of the
following is “L”.
AMP board: CN215
pin 8 (HP_DET)
Check the following parts and
the surrounding circuit.
AMP board:
IC350 (R-ch), IC351 (L-ch)
NG
Check that voltage of the
following is “H”.
AMP board: CL240 or
CN215 pin 1 (XAMUTE)
Check the following parts and
the surrounding circuit, and
exchange the defective parts
or board.
DIGITAL board: IC306
NG
Check that the harness is
correctly inserted in CN215 on
the AMP board and CN303 on
the DIGITAL board.
NG Reinsert the harness.
Repair the harness.
NG
Check the following parts and
the surrounding circuit.
AMP board: IC206, Q209,
Q210, Q213, Q214, Q216
Check that the harness is
correctly inserted in CN215 on
the AMP board and CN303 on
the DIGITAL board.
NG Reinsert the harness.
Repair the harness.
NG
Check that the fuses (F202,
F203) on the AMP board are
not damaged.
NG
NG
Exchange the fuses (F202,
F203) on the AMP board.
OK
OK
Exchange the defective parts.
Repair the harness.
Exchange the DAC board and
AMP board.
– From page 18 –

UDA-1
20
NG
OK
OK
OK
OK
OK
Check that voltage of the
following is “H”.
AMP board: CN215
pin 8 (HP_DET)
NG
NG
OK
OK
NG
NG
Check the HP board, and
exchange the defective parts
or board.
Check the following parts and
the surrounding circuit, or
exchange the DIGITAL board.
DIGITAL board: IC103, IC104,
IC106, IC107, IC111, IC402
NG Check the following parts and
the surrounding circuit, or
exchange the DAC board.
DAC board:
IC400, IC401, IC402, IC405
Check that the sound from
the LINE IN input is outputted
of headphone.
Check that the sound from
the OPTICAL/COAXIAL input
is outputted of speaker.
Exchange the J600 on the HP
board, or exchange the HP
board.
Check that headphone signal
is outputted from the following
pins.
AMP board: CN202
pin 2 (HP_R), 4 (HP_L)
Check the AMP board, and
exchange the defective parts
or board.
Check that headphone signal
is outputted from the following
pins.
HP board:
CL601 (R-ch), CL603 (L-ch)
OK
Check that the connector pin
(J101, IC101 on the DIGITAL
board) terminal is normal.
NG NG
Check that digital audio signal
is outputted from the following
pins (MCLK, BCK, DATA,
LRCK).
DIGITAL board: CN304
pin 1, 3, 4, 5
NG
Check that digital audio signal
is inputted to the following pins.
DAC board: CN404
pin 1, 4, 5, 6
Check that the harness is
correctly inserted in CN404 on
the DAC board and CN304 on
the DIGITAL board.
Check that signal is outputted
from the following pins.
DAC board: CN401
pin 5 (R), 7 (L)
Check that the harness is
correctly inserted in CN202 on
the AMP board and CN600 on
the HP board.
Reinsert the harness.
Repair the harness.
NG
OK
Exchange the J101, IC101 on
the DIGITAL board.
– Continued on
page 21 –
OK
– From page 18 –