Denon AVR-1612 User manual

D&M Holdings Inc.
SERVICE MANUAL
e
e
MODEL JP E3 E2 EK EA E1 E1K E1C
AVR-1612
P P P P
AVR-1622
P
AV SURROUND RECEIVER
Ver. 1
S0233-1V01DM/DG1104
• Some illustrations using in this service manual are slightly different from the actual set.
• Please use this service manual with referring to the operating instructions without fail.
• For purposes of improvement, specications and design are subject to change without notice.

2
CONTENTS
SAFETY PRECAUTIONS ..........................................................3
NOTE FOR SCHEMATIC DIAGRAM .........................................4
TECHNICAL SPECIFICATIONS ................................................5
DIMENSION ...............................................................................5
CAUTIONS IN SERVICING .......................................................6
Initializing AV SURROUND RECEIVER ....................................6
Service Jig ................................................................................6
DISASSEMBLY ..........................................................................7
1. HDMI UNIT ASSY ..................................................................9
2. FRONT PANEL ASSY .........................................................10
3. INPUT PCB ASSY ...............................................................11
4. RADIATOR ASSY ................................................................12
5. REGULATOR PCB ..............................................................13
6. SMPS PCB ..........................................................................13
7. TRANS POWER ..................................................................13
SPECIAL MODE ......................................................................14
Special mode setting button ....................................................14
1. µcom/DSP Version display mode ........................................15
2. Errors checking mode
(Displaying the protection history) .......................................17
3. Remote ID Setup mode .......................................................19
4. DIAGNOSTIC MODE
(Video/Audio (signal) path conrmation mode) ...................21
BLOCK DIAGRAM ...................................................................23
JIG FOR SERVICING ..............................................................35
WHEN THE MICROPROCESSOR IS
REPLACED WITH A NEW ONE .............................................37
PROCEDURE FOR UPGRADING
THE VERSION OF THE FIRMWARE .....................................37
1. How to update by DFW .......................................................37
ADJUSTMENT .........................................................................41
SURROUND MODES AND PARAMETERS ............................42
TROUBLE SHOOTING ............................................................46
1. POWER ...............................................................................46
2. Analog video ........................................................................47
3. HDMI/DVI ............................................................................51
4. AUDIO .................................................................................56
5. USB .....................................................................................59
6. SMPS ..................................................................................60
WIRING DIAGRAM ..................................................................64
CLOCK FLOW & WAVE FORM IN DIGITAL BLOCK .............65
LEVEL DIAGRAM ....................................................................66
SCHEMATIC DIAGRAMS ........................................................71
DIGITAL UNIT (1/8) .................................................................71
HDMI PART .........................................................................71
DIGITAL UNIT (2/8) .................................................................72
DIGITAL SUPPLY PART ......................................................72
DIGITAL UNIT (2/8) .................................................................72
HDMI PART .........................................................................72
DIGITAL UNIT (3/8) .................................................................73
MCU PART ..........................................................................73
DIGITAL UNIT (4/8) .................................................................74
MCU_LEVEL_CHG PART ...................................................74
DIGITAL UNIT (5/8) .................................................................75
USB TCC8600 PART...........................................................75
DIGITAL UNIT (6/8) .................................................................76
DIR PART ............................................................................76
DIGITAL UNIT (7/8) .................................................................77
DSP PART ..........................................................................77
DIGITAL UNIT (8/8) .................................................................78
MAIN DAC PART .................................................................78
INPUT UNIT (1/2) ....................................................................79
AUDIO PART .......................................................................79
INPUT UNIT (2/2) ....................................................................80
VIDEO PART .......................................................................80
FRONT UNIT ...........................................................................81
VOLUME UNIT ........................................................................81
POWER UNIT .........................................................................81
HEADPHONE UNIT ................................................................81
iPod/USB UNIT (AVR-1612 ONLY) .........................................81
PORTABLE UNIT (AVR-1312 ONLY) ......................................81
REGULATOR UNIT (AVR-1312 ONLY) ...................................81
MAIN UNIT ..............................................................................82
REGULATOR UNIT .................................................................83
D-TERMINAL UNIT(JP ONLY) ................................................84
CONNECTOR UNIT ................................................................85
SMPS UNIT .............................................................................86
EXPLODED VIEW ....................................................................87
PARTS LIST OF EXPLODED VIEW ........................................89
PACKING VIEW .......................................................................92
PARTS LIST OF PACKING & ACCESSORIES .......................92
PARTS LIST OF P.C.B. UNIT ..................................................94
FRONT PCB UNIT ASS'Y .......................................................94
DIGITAL PCB UNIT ASS'Y ......................................................96
INPUT PCB UNIT ASS'Y .......................................................102
MAIN PCB UNIT ASS'Y.........................................................104
POWER PCB UNIT ASS'Y ....................................................108
SEMICONDUCTORS .............................................................110
1. IC's ....................................................................................110
2. FL DISPLAY.......................................................................135
PRINTED WIRING BOARDS .................................................137
DIGITAL PCB UNIT ...............................................................137
FRONT PCB UNIT ................................................................139
INPUT PCB UNIT ..................................................................141
MAIN PCB UNIT....................................................................143
POWER PCB UNIT ...............................................................145

3
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 z
mark 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 z mark.
The use of parts other than the
designated parts could cause electric
shocks, res or other dangerous
situations.
CAUTION Concerning important safety
parts

4
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.
NOTE FOR PARTS LIST
Parts indicated by "nsp" on this table cannot be supplied.
When ordering a part, make a clear distinction between "1" and "I" (i) to avoid mis-supplying.
A part ordered without specifying its part number can not be supplied.
General-purpose Carbon Chip Resistors are not included are not included in the P.W.Board parts list.
(Refer to the Schematic Diagram for those parts.)
Parts indicated by the z mark have critical characteristics. Use ONLY replacement parts recommended by the manufacturer.
General-purpose Carbon Film Resistor in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.)
Part indicated by "★" mark is not illustrated in the exploded view.
WARNING:
1.
2.
3.
4.
5.
6.
●Resistors
RD : Carbon
RC : Composition
RS : Metal oxide film
RW: winding
RN : Metal film
RK : Metal mixture
P : Pulse-resistant type
NL : Low noise type
NB : Non-burning type
FR : Fuse-resistor
F : Lead wire forming
2B : 1/8 W
2E : 1/4 W
2H : 1/2 W
3A : 1 W
3D : 2 W
3F : 3 W
3H : 5 W
F : ±1%
G:±2%
J : ±5%
K : ±10%
M : ±20%
Ex.: RN
Type
14K
Shape
and per-
formance
2E
Power
182
Resist-
ance
G
Allowable
error
FR
Others
*Resistance
1800ohm=1.8kohm1 8 2
Indicates number of zeros after effective number.
2-digit effective number.
1.2ohm1 R 2
2-digit effective number, decimal point indicated by R.
1-digit effective number.
: Units: ohm
●Capacitors
CE : Aluminum foil
electrolytic
CA : Aluminium solid
electrolytic
CS : Tantalum electrolytic
CQ : Film
CK : Ceramic
CC : Ceramic
CP : Oil
CM: Mica
CF : Metallized
CH : Metallized
HS : High stability type
BP : Non-polar type
HR : Ripple-resistant type
DL : For change and discharge
HF : For assuring high frequency
U : UL part
C : CSA part
W : UL-CSA part
F : Lead wire forming
0J : 6.3 V
1A : 10 V
1C : 16 V
1E : 25 V
1V : 35 V
1H : 50 V
2A : 100 V
2B : 125 V
2C : 160 V
2D : 200 V
2E : 250 V
2H : 500 V
2J : 630 V
F : ±1%
G:±2%
J : ±5%
K : ±10%
M : ±20%
Z : ±80%
: - 20%
P : +100%
C : ±0.25pF
D : ±0.5pF
= : Others
Ex.: CE
Type
04W
Shape
and per-
formance
1H
Dielectric
strength
3R2
Capacity
M
Allowable
error
BP
Others
･ Units:μF.
2200μF2 2 2
Indicates number of zeros after effective number.
2-digit effective number. ･ Units:μF.
2.2μF2 R 2
2-digit effective number, decimal point indicated by R
1-digit effective number.
*Capacity (electrolyte only)
･When the dielectric strength is indicated in AC,"AC" is included after the dielectric strength value.
*Capacity (except electrolyte)
･ Units:pF
2200pF=0.0022μF2 2 2
Indicates number of zeros after effective number. (More than 2)
2-digit effective number. ･ Units:pF
220pF2 2 1
2-digit effective number.
Indicates number of zeros after effective number. (0 or 1)
NOTE FOR PARTS LIST

5
TECHNICAL SPECIFICATIONS
nAudio Section
• Power amplier
Rated output :
Front :
75 W + 75 W (8 Ω, 20 Hz – 20 kHz with 0.08 % T.H.D.)
120 W + 120 W (6 Ω, 1 kHz with 0.7 % T.H.D.)
Center :
75 W (8 Ω, 20 Hz – 20 kHz with 0.08 % T.H.D.)
120 W (6 Ω, 1 kHz with 0.7 % T.H.D.)
Surround :
75 W + 75 W (8 Ω, 20 Hz – 20 kHz with 0.08 % T.H.D.)
120 W + 120 W (6 Ω, 1 kHz with 0.7 % T.H.D.)
Output connectors : 6 – 16 Ω
• Analog
Input sensitivity/Input impedance : 200 mV/47 kΩ
Frequency response: 10 Hz – 100 kHz — +1, –3 dB (DIRECT mode)
S/N : 98 dB (IHF–A weighted, DIRECT mode)
nVideo section
• Standard video connectors
Input/output level and impedance : 1 Vp-p, 75 Ω
Frequency response : 5 Hz – 10 MHz — 0, –3 dB
nTuner section
[FM](Note: μV at 75 Ω, 0 dBf = 1 x 10–15 W)
Receiving Range :
(E3 model)
[FM] 87.5 MHz – 107.9 MHz [AM]520 kHz – 1710 kHz
(E2,EA,E1C model)
[FM] 87.5 MHz – 108.0 MHz [AM]522 kHz – 1611 kHz
Usable Sensitivity :
[FM]1.2 μV (12.8 dBf) [AM]18 μV
50 dB Quieting Sensitivity :
[FM]MONO 2.8 μV (20.2 dBf)
S/N (IHF-A) :
[FM]MONO 70 dB
STEREO 67 dB
Total harmonic Distortion (at 1 kHz) :
[FM]MONO 0.7 %
STEREO 1.0 %
nGeneral
Power supply : AC 120 V, 60 Hz(E3 model)
AC 230 V, 50/60 Hz(E2 model)
AC 220 V, 50 Hz(E1C model)
Power consumption :
360 W
0.1 W (Standby)
3 W (CEC standby)
Maximum external dimensions :
435 (W) x 162 (H) x 382 (D) mm
Weight : 9.3 kg
nRemote Control Unit (RC-1157)
Batteries : R6/AA Type (two batteries)
Maximum external dimensions : 53 (W) x 224 (H) x 28 (D) mm
Weight : 160 g (including batteries)
DIMENSION
147.0
15.0
162.0
21.5 54.7 236.8
338.5 22.0
382.0
340.0
435.0
43.5 245.0
30.5 86.0 30.5

6
CAUTIONS IN SERVICING
Initializing AV SURROUND RECEIVER
AV SURROUND RECEIVER initialization should be performed when the μcom, peripheral parts of μcom, and Digital
P.W.B. were replaced.
1. Turn off the power pressing ON/STANDBY button.
2. Press ON/STANDBY button while simultaneously while pressing iPod system 8 and iPod system 9 buttons.
3. Check that the entire display is ashing at intervals of about 1 second, and then release the 2 buttons.
The microprocessor will be initialized.
Service Jig
When you repair the printing board, you can use the following JIG (Extension cable kit).
Please order it from Denon Ofcial Service Distributor in your region if necessary.
8U-110084S : EXTENSION UNIT KIT : 1 Set
(Refer to 35 page.)
When you update the rmware by DFW, you can use the following JIG (RS232C to internal connector conversion adapter
with 4P FFC cable kit ).
Please order to Denon Ofcial Service Distributor in your region if necessary.
8U-210100S : WRITING KIT : 1 Set
(Refer to 37 page.)
Note: • If step 3 fails, start over from step 1.
• 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.
ON/STANDBY iPod system 8iPod system 9

7
DISASSEMBLY
• Disassemble in order of the arrow in the following gure.
• In the case of the re-assembling, assemble it in order of the reverse of the following ow.
• In the case of the re-assembling, observe "attention of assembling".
• If wire bundles are untied or moved to perform adjustment or replace parts etc., be sure to rearrange them neatly as
they were originally bundled or placed afterward.
Otherwise, incorrect arrangement can be a cause of noise generation.
FRONT PANEL ASSY
Refer to "DISASSEMBLY
2. FRONT PANEL ASSY
and "EXPLODED VIEW"
HEADPHONE PCB
(Ref. No. of EXPLODED VIEW : C1)
USB PCB
(Ref. No. of EXPLODED VIEW : C2)
FRONT PCB
(Ref. No. of EXPLODED VIEW : C3)
VOLUME PCB
(Ref. No. of EXPLODED VIEW : C4)
WIRE SUPPORT PCB
(Ref. No. of EXPLODED VIEW : C7)
RADIATOR ASSY
Refer to "DISASSEMBLY
4. RADIATOR ASSY
and "EXPLODED VIEW"
MAIN PCB
(Ref. No. of EXPLODED VIEW : C10)
INPUT PCB ASSY
Refer to "DISASSEMBLY
3. INPUT PCB ASSY
and "EXPLODED VIEW"
INPUT PCB ASS'Y
(Ref. No. of EXPLODED VIEW : C11)
TRANS POWER
Refer to "DISASSEMBLY
7. TRANS POWER
and "EXPLODED VIEW"
TRANS POWER
(Ref. No. of EXPLODED VIEW : C9)
REGULATOR PCB
Refer to "DISASSEMBLY
5. REGULATOR PCB
and "EXPLODED VIEW"
REGULATOR PCB
(Ref. No. of EXPLODED VIEW : C6)
SMPS PCB
Refer to "DISASSEMBLY
6. PCB SMPS PCB
and "EXPLODED VIEW"
SMPS PCB
(Ref. No. of EXPLODED VIEW : C5)
HDMI UNIT ASSY
Refer to "DISASSEMBLY
1. HDMI UNIT ASSY
and "EXPLODED VIEW"
CONNECTOR PCB
(Ref. No. of EXPLODED VIEW : C13)
GND CONNECT PCB
(Ref. No. of EXPLODED VIEW : C17)
DIGITAL PCB ASS'Y
(Ref. No. of EXPLODED VIEW : C12)
TOP CABINET

8
About the photos used for "descriptions of the DISASSEMBLY" section
• The shooting direction of each photograph used herein is indicated on the left side of the respective photograph as
"Shooting direction: ***".
• Refer to 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 AVR-1612E3 model.
The viewpoint of each photograph
(Shooting direction)
［View from the top］
Front side
Shooting direction: B
Shooting direction: DShooting direction: C
Shooting direction: A

9
1. HDMI UNIT ASSY
(1) Disconnect the connector board.
(2) Remove the screws.
(3) Remove the screws and board.
Cut the wire clamp band, then disconnect the connector wire and the FFC cables.
TOP CABINET HDMI UNIT ASSY
→
Proceeding :
CONNECTOR PCB
Shooting direction: C
Shooting of photograph: A
DIGITAL PCB ASS'Y
cut
FFC Cable CN151
CN252
CN341

10
2. FRONT PANEL ASSY
(1) Remove the screws.
(2) Cut the wire clamp band, then remove the screws.
Disconnect the connector wires.
Proceeding : TOP CABINET HDMI UNIT ASSY
→FRONT PANEL ASSY →
View from the bottom
CN604CN407 CN603 cut
Please refer to "EXPLODED VIEW" for the disassembly method of each P.W.B included in FRONT PANEL ASSY.

11
3. INPUT PCB ASSY
(1) Disconnect the connector wires and remove the INPUT PCB ASSY.
(2) Remove the screws.
Proceeding : TOP CABINET HDMI UNIT ASSY
→INPUT PCB ASSY →
INPUT PCB ASS'Y
cut
CN407CN408
CN931
Shooting of photograph: A

12
4. RADIATOR ASSY
(1) Remove the screws, then disconnect the connector wires.
(2) Remove the screws, then remove the REAR PANEL.
Proceeding : TOP CABINET HDMI UNIT ASSY
→INPUT PCB ASSY →
RADIATOR ASSY
→
RADIATOR ASS'Y
CN603
CN703
Shooting of photograph: A

13
5. REGULATOR PCB
6. SMPS PCB
7. TRANS POWER
TOP CABINET REGULATOR PCB
→
Proceeding :
Please refer to "EXPLODED VIEW" for the disassembly method of REGULATOR PCB.
TOP CABINET SMPS PCB
→
Proceeding :
Please refer to "EXPLODED VIEW" for the disassembly method of SMPS PCB.
TOP CABINET TRANS POWER
→
Proceeding :
Please refer to "EXPLODED VIEW" for the disassembly method of TRANS POWER.

14
SPECIAL MODE
Special mode setting button
b No.1 - 9 : Press the ON/STANDBY button to turn on the power while pressing both the button A and the button B at the same
time.
b No.10 : Turn on the power, then press and hold down A and B buttons for over 3 second.
No. Mode Button A Button B Contents
1Version display
(μcom/DSP Error Display) DIMMER STATUS Firmware versions such as Main or DSP are displayed in the FL manager. Errors are displayed when they occur. (Refer to 15 page)
2 Displaying the protection history mode SLEEP STATUS The protection history is displayed.
(Refer to 17 page)
3User Initialization mode
(Installer Setup settings are not initialized.)
iPod system
8
iPod system
9
Backup data initialization is carried out.
(Installer Setup settings are not initialized.)
4Mode for switching tuner frequency step
(E2 model Only)
TUNER
PRESET CH + SOURCE dChange tuner frequency step to FM:200kHz/AM:10kHzSTEP
5Mode for preventing remote control
acceptance iPod system 2iPod 1
Operations using the remote control are rejected.
(Mode cancellation: Turn off the power and execute the same
button operations as when performing setup.)
6 Panel lock mode TUNER RESTORER Operations using the main unit panel buttons or the master volume
knob are rejected.
7Panel lock mode
(Master volume is not locked.) SHIFT RESTORER Operations using the main unit panel buttons are rejected.
8 Cancellation of panel lock mode TUNER
PRESET CH - RESTORER Panel lock mode is cancelled.
9 Diagnostic mode iPod system 2STATUS
This mode is used for conrming the Video and Audio (signal)
paths. (Troubleshooting)
The signal paths of the set can be easily conrmed after repair.
10 Remote ID Setup mode iPod system 2STATUS
When using multiple DENON AV receivers in the same room, make
this setting so that only the desired AV receiver operates.(Refer to 19
page)
STATUS
DIMMERSLEEP
TUNER PRESET CH -
TUNER PRESET CH +
TUNER SHIFT
iPod 1
ON/STANDBY
RESTORER
iPod system 2
SOURCE d
iPod system 8
iPod system 9

15
1. µcom/DSP Version display mode
1.1. Operation specications
µcom/DSP version display mode:
When the set is started up in this mode, the version information is displayed.
Starting up:
Press the "ON/STANDBY" button to turn on the power while pressing the "STATUS" and "DIMMER" buttons.
Now, press the "STATUS" button to the display the 2nd item information on the FL Display.
b When the version is displayed on the FL Display, the version list is also displayed on the OSD.
1.2. Display Order
Error information(Refer to 1.3. Error display) → q Model destination information → w Main µ-com Version
→ e Main FBL → r DSP Version → t Audio PLD Version → y OSD Version → u USB Version
→ i iPod Version (Connected only)
q Model destination information :
FLD
AVR1612 E3
FLD
AVR1612 E2/EA
FLD
AVR1612 E1C
FLD
AVR1622 E1C
w Main µ-com Version :
FLD
Main :****####
(* : Main version, #: Sub version)
e Main FBL :
FLD
Main FBL :**.**
r DSP Version :
FLD
DSP :**.**
t Audio PLD Version :
FLD
Audio PLD:**.**
y OSD Version :
FLD
OSD :@@$x****
(@: Model code, $: Brand code, x: Region code, *: version)
u USB Version :
FLD
USB :**.**
i iPod Version :
FLD
*iPod Dock:**.**
(ASD-1R/11R)
FLD
*Dock :*********
(ASD-3/51)

16
1.3. Error display
See the following table for each "Error information" display and its explanation (status).
Display order is q,w,e,r,t.
Condition Status FL Display Trouble shooting
q
Firm Check
NG
Compared with the destination setting
on the board. This is displayed when the
model name or destination information
written into the rmware does not match.
(b)
FIRM ERROR
• Please check the
destination-resistors
(R2031/R2032,
DIGITAL B'D).
• Please write the
rmware of correct
destination.
w
DIR NG No response from DIR DIR ERROR 01
• Please check DIR
（IC402, DIGITAL B'D)
and around circuits.
e
DSP NG
When DSP code boot is performed, the
DSP FLAG0 port does not change to "H"
even if DSP reset is executed.
DSP ERROR 01
• Please check DSP
（IC404, DIGITAL B'D)
and around circuits.
Before DSP command is issued, the DSP
FLAG0 port does not change to "H". DSP ERROR 02
When DSP data read is performed,
executing WRITE="L" does not result in
ACK="H".
DSP ERROR 03
When DSP data read is performed,
executing REQ="L" does not result in
ACK="L".
DSP ERROR 04
When DSP data writing is performed,
executing WRITE="H" does not result in
ACK="H".
DSP ERROR 05
When DSP data writing is performed,
executing REQ="L" does not result in
ACK="L".
DSP ERROR 06
r
EEPROM NG
Error occurs in EEPROM checksum.(*** is
a block address number.) E2PROM ERR***
t
Both DSP /
EEPROM OK
(No error display, version display only)
y
USB NG No response from USB-µcom. USB ERROR 01
Status FL Display
b
When the rmware version is displayed,
▲ is displayed at the start of the rmware.
–
Main :********
–
DSP :**.**
–
Audio PLD:**.**
–
OSD :********

17
2. Errors checking mode (Displaying the protection history)
2.1. Operation specications
Error mode (Displaying the protection history):
When the set is started up in this mode, the error information is displayed.
Starting up:
• Common in all the models
Press the "ON/STANDBY" button to turn on the power while pressing the "STATUS" and "SLEEP" buttons. The error
(protection history display) mode is set.
Now, press the "STATUS" button to turn on the FL display.
2.2. About the display on the FL display
When the "STATUS" button is pressed after setting the error (protection history display) mode is set, a history like the one
shown below is displayed, depending on the conditions.
(1) Normal (when there has been no protection incident)
FLD
NO PROTECT
(2) For ASO (when the last protection incident was ASO protection)
FLD
PRT:ASO
Cause: The line between speaker terminals is shorted, or speakers with impedance of less than the rated value.
Supplementary information: As the excess current is detected after operation of the speaker relay, a short on the
speaker terminal and the connected speaker can be identied.
If the power is turned on without correcting the abnormality, the protection function will work about 5 seconds later
and the power supply will be shut off.
(3) For DC (when the last protection incident was DC protection)
FLD
PRT:DC
Cause: DC output of the power amplier is abnormal.
If the power is turned on without correcting the abnormality, the protection function will work about 5 seconds later
and the power supply will be shut off.
(4) For THERMAL (when the last protection incident was THERMAL(A) or THERMAL(B) protection)
FLD
PRT:THERMAL A
FLD
PRT:THERMAL B
Cause: The temperature of the heat sink is excessive.
If the power is turned on without correcting the abnormality, the protection function will work about 5 seconds later
and the power supply will be shut off.
b Additional causes of protection can be due to loose connections, associated components, Microprocessor, etc.
When the "STATUS" button is pressed again after the above protection history as shown above is displayed, the normal
display reappears.

18
2.3. Clearing the protection history
There are two ways to clear the protection history, as described below.
(1) Start up the set in error (protection display) mode and display the error, then press and hold down the "iPod 1"
button for 3 seconds.
FLD
PRT:DC
Press the "iPod 1" button for 3 seconds.
FLD
PRT:CLEAR
The above is displayed and the protection history is cleared.
FLD
NO PROTECT
(2) Initialize. (Refer to "Initializing AV SURROUND RECEIVER" 6 page.)
b If you want to save a backup, perform the method in 2.3.(1) above.
Warning indication by the POWER LED
If the power is turned off when a protection incident has been detected, the POWER LED (red) ashes as a warning
according to the conditions in which the protection incident occurred.
(1) ASO/DC PROTECTION : Flashes at intervals of 0.5 seconds (0.25 seconds lit, 0.25 seconds off)
(2) THERMAL (A/B) PROTECTION : Flashes at intervals of 2 seconds (1 second lit, 1 second off)

19
3. Remote ID Setup mode
3.1. Specications
When using multiple DENON AV receivers in the same room, make this setting so that only the desired AV receiver
operates.
2.2. Setting the AV receivers
Starting up:
Press and hold both "STATUS" and "iPod system 2" buttons for over 3 second with the power turned on.
(1) When Remote ID Setup mode is started, the following is displayed.
FLD
REMOTE ID ?
(2) Press the "QUICK SELECT 1 - 4" button that corresponds to the number you want to set.
Button FL Display
QUICK SELECT 1 REMOTE ID 1
QUICK SELECT 2 REMOTE ID 2
QUICK SELECT 3 REMOTE ID 3
QUICK SELECT 4 REMOTE ID 4
(3) Turn off the power using "ON/STANDBY" button.
(4) Turn on the power using "ON/STANDBY" button.
b When Remote ID Setup mode is running, operations other than the "QUICK SELECT 1 - 4" buttons or "ON/
STANDBY" buttons on the main unit are not received.
2.2. Setting the Remote control unit
(1) Press the "AMP" button.
The zone mode indicator ashes twice.
(2) Press the "QUICK SELECT 1, 2, 3 or 4" button.
The zone mode indicator ashes twice.
NOTE:
If the IDs do not match, "AVAMPz" (z is the main unit's remote control ID) appears on the display when the remote
control unit is operated.

20
Personal notes: