Denon AVR-1910, AVR-1610, AVR-1620, AVR-790 Schematic

Please heed the points listed below during servicing and inspection.

SAFETY PRECAUTIONS

The following check should be performed for the continued protection of the customer and service technician.

LEAKAGE CURRENT CHECK

Before returning the unit to the customer, make sure you make 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 unit is defective.

CAUTION

CAUTION

◎Heed the cautions!

Spots requiring particular attention when servicing, such
as the cabinet, parts, chassis, etc., have cautions indicated
on labels or seals. Be sure to heed these cautions and the
cautions indicated in the handling instructions.

◎Caution concerning electric shock!

(1) An AC voltage is impressed on this set, so touching in-

ternal metal parts when the set is energized could
cause electric shock. Take care to avoid electric shock,
by for example using an isolating transformer and
gloves when servicing while the set is energized, un­plugging the power cord when replacing parts, etc.

(2)There are high voltage parts inside. Handle with extra

care when the set is energized.

◎Caution concerning disassembly and

assembly!

Though great care is taken when manufacturing parts from
sheet metal, there may in some rare cases be burrs on the
edges of parts which could cause injury if fingers are
moved across them. Use gloves to protect your hands.

◎Only use designated parts!

The set's parts have specific safety properties (fire resis­tance, voltage resistance, etc.). For replacement parts, be
sure to use parts which have the same properties. In par­ticular, for the important safety parts that are marked z on
wiring diagrams and parts lists, be sure to use the desig­nated parts.

◎Be sure to mount parts and arrange

the wires as they were originally!

For safety reasons, some parts use tape, 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 inside and clamps are used to
keep wires away from heating and high voltage parts, so
be sure to set everything back as it was originally.

◎Inspect for safety after servicing!

Check that all screws, parts and wires removed or discon­nected for servicing have been put back in their original po­sitions, inspect that no parts around the area that has been
serviced have been negatively affected, conduct 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 turn the power switch on. Us­ing a 500V insulation resistance tester, check that the in­sulation resistance between the terminals of the power
plug and the externally exposed metal parts (antenna ter­minal, headphones terminal, microphone terminal, input

terminal, etc.) is 1MΩ or greater. If it is less, the set must

be inspected and repaired.

Concerning important safety

parts

Many of the electric and structural parts used in the set
have special safety properties. In most cases these prop­erties are difficult to distinguish by sight, and using 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 parts lists is this service manual. Be sure to re­place them with parts with the designated part number.

(1) Schematic diagrams ... Indicated by the z mark.
(2) Parts lists ... Indicated by the z mark.

Using parts other than the designated
parts could result in electric shock, fires or
other dangerous situations.

AVR-1910/1620/1610/790/590

2

DIMENSION

AVR-1910 model

3

AVR-1910/1620/1610/790/590

AVR-1610/1620 model

4

AVR-1910/1620/1610/790/590

AVR-790 model

5

AVR-1910/1620/1610/790/590

AVR-590 model

6

AVR-1910/1620/1610/790/590

WIRE ARRANGEMENT

Back Panel side

Front Panel side

If wire bundles are untied or moved to perform adjustment or parts replacement 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.

Wire arrangement viewed from the top

7

AVR-1910/1620/1610/790/590

DISASSEMBLY

CABINET TOP

PANEL FRONT ASSY PCB CNT1 PCB SPEAKER ASSY

Refer to "DISASSEMBLY 1.PANEL FRONT ASSY" Refer to "DISASSEMBL 2.PCB CNT1" Refer to "DISASSEMBLY 3.PCB SPEAKER ASSY"

and "EXPLODED VIEW" and "EXPLODED VIEW" and "EXPLODED VIEW"

PCB POWER SW ASSY PCB CNT1 (Ref. No. of EXPLODED VIEW : 71) PCB SPEAKER ASSY

(Ref. No. of EXPLODED VIEW : 9) (Ref. No. of EXPLODED VIEW : 63)

PCB FUNC ASSY
(Ref. No. of EXPLODED VIEW : 10)
PCB FRONT ASSY
(Ref. No. of EXPLODED VIEW : 11)

CHASSIS BACK PCB POWER/POWER SUPPLY ASSY

PCB ENCORDER

Refer to "DISASSEMBLY 4.CHASSIS BACK" Refer to "DISASSEMBLY
(Ref. No. of EXPLODED VIEW : 13) and "EXPLODED VIEW" 6.PCB POWER/POWER SUPPLY ASSY"

PCB HEAD PHONE ASSY

and "EXPLODED VIEW"

(Ref. No. of EXPLODED VIEW : 14) PCB POWER SUPPLY ASSY

PCB V-AUX ASSY (Ref. No. of EXPLODED VIEW : 56)
(Ref. No. of EXPLODED VIEW : 21) PCB POWER ASSY
PCB MIC ASSY

PCB MAIN ASS

Y

(Ref. No. of EXPLODED VIEW : 57)

(Ref. No. of EXPLODED VIEW : 22)

Refer to "DISASSEMBLY 5.PCB MAIN ASSY"
PCB CNT ENCORDER and "EXPLODED VIEW"
(Ref. No. of EXPLODED VIEW : 61) PCB MAIN ASSY

TRANS MAIN

PCB SW (Ref. No. of EXPLODED VIEW : 50)

Referto"DISASSEMBLY8.TRANSMAIN"

(Ref. No. of EXPLODED VIEW : 78) PCB INPUT ASSY and "EXPLODED VIEW"

(Ref. No. of EXPLODED VIEW : 51) TRANS MAIN

PCB VIDEO ASSY (Ref. No. of EXPLODED VIEW : 46)

PCB AMP ASSY (Ref. No. of EXPLODED VIEW : 53)

Refer to "DISASSEMBLY 7.PCB AMP ASSY"

PCB DIGITAL ASSY

and "EXPLODED VIEW" (Ref. No. of EXPLODED VIEW : 54)

PCB AMP ASSY PCB HDMI ASSY
(Ref. No. of EXPLODED VIEW : 33) (Ref. No. of EXPLODED VIEW : 55)

The viewpoint of each photograph
(Photografy direction)

［View from above］

Front side

Direction of photograph: B

Direction of photograph: D

Direction of photograph: C

Direction of photograph: A

• Disassemble in order of the arrow of the figure of following flow.

• In the case of the re-assembling, assemble it in order of the reverse of the following flow.

• In the case of the re-assembling, observe "attention of assembling" it.

About the photos used for descriptions in the “DISASSEMBLY” section.

• The direction from which the photographs used herein were photographed is indicated at "Direction of photograph: ***" at
the left of the respective photographs.

• Refer to the table below for a description of the direction in which the photos were taken.

• Photographs for which no direction is indicated were taken from above the product.

• The photograph is AVR-1910.

8

AVR-1910/1620/1610/790/590

1. PANEL FRONT ASSY

Proceeding : CABINET TOP →PANEL FRONT ASSY

View from bottom

Direction of photograph: D

Style pin : Loose

cut

Cord holder : Loose

Cord holder : Loose

Style pin : Loose

CP1501

CP1300

Style pin : Loose

CP1001

CP1705

FFC Cable

CP1307

cut

Please refer to "EXPLODED VIEW" for the disassembly method of each P.W.B included in PANEL FRONT ASSY.

(1) Remove the screws.

(2) Cut the wire clamp band, and loose the style pin.

(3) Cut the wire clamp band, then loose the style pin and Cord holder. Disconnect the connector wire and FFC Cable.

AVR-1910/1620/1610/790/590

9

2. PCB CNT1

Proceeding : CABINET TOP →PCB CNT1

PCB CNT1

PCB CNT (1910/790 model)

Board to board

Board to board

Board to board

Proceeding : CABINET TOP →PCB SPEAKER ASSY

CP1001 (1910/790 model)

CN1309 (1910/790 model)

CP1002 (1910/790 model)

※CP1003 (1610/1620/590/ model), CP1004 (1610/1620/590/ model)

PCB SPEAKER ASSY

Direction of photograph: A

(1) Disconnect the connector board.

3. PCB SPEAKER ASSY

(1) Disconnect the connector wires.

(2) Remove the screws.

10

AVR-1910/1620/1610/790/590

4. CHASSIS BACK

Proceeding : CABINET TOP →PCB SPEAKER ASSY →CHASSIS BACK

Direction of photograph: A

Proceeding : CABINET TOP →PCB SPEAKER ASSY →CHASSIS BACK

→PCB MAIN ASSY

CP1700

CP1002

CP1004

CP1001

CP1003

Style pin : Loose

CP1001

CP1005

CP1501

CP1200

CP1000

CP1003

FFC Cable

Style pin : Loose

cut

cut

(1) Remove the screws.

5. PCB MAIN ASSY

(1) Cut the wire clamp band, then loose the style pin and Cord holder. Disconnect the connector wire and FFC Cable.

11

AVR-1910/1620/1610/790/590

(1) Disconnect the connector board.

Board to board

Board to board

Board to board

PCB DIGITAL ASSY

PCB MAIN ASSY

PCB VIDEO ASSY

PCB EXT. ASSY (1910/790 model) PCB INPUT ASSY

PCB HDMI ASSY

(2) Remove the screws.

AVR-1910/1620/1610/790/590

12

6. PCB POWER/POWER SUPPLY ASSY

Proceeding : CABINET TOP →PCB POWER/POWER SUPPLY ASSY

cut

cut

CP1705

CP1706

CP1704

CP1700

Style pin : Loose

PCB POWER ASSY

PCB POWER SUPPLY ASSY

ً

(1) Cut the wire clamp band, then loose the style pin and Cord holder. Disconnect the connector wire.

(2) Remove the screws.

AVR-1910/1620/1610/790/590

13

7. PCB AMP ASSY

Proceeding : CABINET TOP →PCB AMP ASSY

View from bottom

FFC Cable

CP1200

CP1003

Style pin : Loose

Style pin : Loose

CP1005

CP1001

CP1001

CP1000

CP1309

CP1501

cut

PCB AMP ASSY

Direction of photograph: D

Style pin : Loose

Direction of photograph: C

(1) Remove the screws.

(2) Cut the wire clamp band, then loose the style pin and Cord holder. Disconnect the connector wire.

(3) Loose the style pin, then remove the screws.

AVR-1910/1620/1610/790/590

14

8. TRANS MAIN

Proceeding : CABINET TOP → TRANS MAIN

Direction of photograph: D

Style pin : Loose

CP1002

CP1004

CP1307

CP1300

Cord holder : Loose

(1) Loose the style pin.

(2) Loose the Cord holder, then disconnect the connector wire.

(3) Remove the screws.

AVR-1910/1620/1610/790/590

15

CAUTION IN SERVICING

Note:・If step 3 does not work, start over from step 1.

・ All user settings will be lost and this factory setting will be recovered when this initialization mode.

So make sure to m+emorize your setting for restoring after the initialization.

SURROUND

MODE 0

SURROUND

MODE 1

ON/OFF

Initializing AV SURROUND RECEIVER

AV SURROUND RECEIVER initialization should be performed when the µcom, peripheral parts of µcom, and Digital P.W.B.
are replaced.

1. Switch off the unit.

2. With the "SURROUND MODE 0" and "SURROUND MODE 1" buttons pressed, press the "ON/OFF" button to turn the

power on.

3. Check that the entire display is flashing with an interval of about 1 second, and release your fingers from the 2 buttons and

the microprocessor will be initialized.

JIG to use for servicing

When you repair the printing board, you can use the following JIG (Extension cable kit). Please order to Denon Official Service
Distributor in your region if necessary.

00D SPK- 561 EXTENSION UNIT KIT : 1 Set
00D SPK- 562 9120 CONN. JOINT KIT : 1 Set

When you update the firmware, you can use the following
JIG (RS232C to internal connector conversion adapter with 8P cable kit ). Please order to Denon Official Service Distributor
in your region if necessary.

00DSPK-581 WRITING UNIT : 1 Set

AVR-1910/1620/1610/790/590

16

SPECIAL MODE g

0

0

DIMMER

STATUSMULTEQ

ENTER

MENU

SURROUND

0 MODE 1

ON/OFF

CURSOR

SOURCE

RESTORER

Special mode setting button

※Press the ON/OFF button to turn on while pressing both buttons A and B at the same time.

Mode Button A Button B Contents

µcom/DSP Version display mode

Errors checking mode
(Displaying the protection history)

Initialization mode

Mode for switching tuner frequency step

Mode for preventing remote control
acceptance

Panel lock mode

Panel lock mode
(Remove Master volume)

Cancellation of panel lock mode MENU RESTORER Panel lock mode is cancelled.

STATUS DIMMER

STATUS MULT EQ

SURROUND

MODE0

SOURCE

CURSOR 0 RESTORER

SURROUND

MODE0

SURROUND

MODE1

SURROUND

MODE1

-

(non)

RESTORER

RESTORER Operations using main unit panel buttons are rejected.

Serial No. and firmware versions such as Main, Sub, DSP are
displayed in the FL manager. Errors are displayed when they
occur. (Refer to 18 page.)

Displaying the protection history
(Refer to 19 page.)

Backup data initialization is carried out.
(Refer to 16 page.)

---E2 model only--­Select with the SOURCE 01 button.

Change tuner frequency step to AM9k/FM50kHz STEP or AM:10k/
FM:200kHz.

Operations using remote control are rejected.
(Mode cancellation: Turn off power and execute the same button
operations as when performing setup.)

Operations using main unit panel buttons or master volume are
rejected.

AVR-1910/1620/1610/790/590

17

1. µcom/DSP Version display mode

1.1. Operation specifications

µcom/DSP version display mode:

When started up, the version information is displayed.

Starting up:

With the "DIMMER" and "STATUS" buttons pressed, press the "ON/OFF" button to turn the power on.
Now, press the "STATUS" button to the display the 2nd item information on the FL Display.

1.2. Display Order

Destination information →Main-µcom version information →Sub-µcom version information → DSP version information

→ APLD version information

1.3. Error display g

See the following table for each "Error information" display and its contents (status).

Display order is ①②③④.

Condition State Display

①Sub-µcom

NG

②DIR NG

③DSP NG

Both SUB/DSP

④

OK

No response from Sub-µcom

No response from DIR

When DSP boot, executing DSP reset makes no change to DSP FLAG0

port "H".

No change to DSP FLAG0 port "H" before issuing DSP command.

When DSP data read, executing WRITE="L" makes no change to ACK="H".

When DSP data read, executing REQ="L" makes no change to ACK="L".

When DSP data write, executing WRITE="H" makes no change to ACK="H".

When DSP data write, executing REQ="L" makes no change to ACK="L".

When DSP special code boot, executing DSP reset makes no change to

DSP FLAG0 port "H".

No change to DSP FLAG0 port "H" before issuing DSP special read com-

mand.

No change to DSP FLAG0 port "H" before DSP version read.

"□ＳＵＢ□ □ＥＲＲＯＲ□０１□□"

"□ＤＩＲ□ □ＥＲＲＯＲ□０１□□"

"□ＤＳＰ□□ＥＲＲＯＲ□０１□ □"

"□ＤＳＰ□□ＥＲＲＯＲ□０２□ □"

"□ＤＳＰ□□ＥＲＲＯＲ□０３□ □"

"□ＤＳＰ□□ＥＲＲＯＲ□０４□ □"

"□ＤＳＰ□□ＥＲＲＯＲ□０５□ □"

"□ＤＳＰ□□ＥＲＲＯＲ□０６□ □"

"□ＤＳＰ□□ＥＲＲＯＲ□１１□ □"

"□ＤＳＰ□□ＥＲＲＯＲ□１２□ □"

"□ＤＳＰ□□ＥＲＲＯＲ□１３□ □"

(No error display, version display
only)

18

AVR-1910/1620/1610/790/590

2. Errors checking mode (Displaying the protection history)

2.1. Operation specifications

Error mode (Displaying the protection history):

When started up, the error information is displayed.

Starting up:

●All model commonness

With the "STATUS" and "MULTEQ" buttons pressed, press the "ON/OFF" button to turn the power on. 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, a history like the one shown
below is displayed, depending on the conditions.

(1) Normally (when there has been no protection incident)

FLD N O P R O T E C T

(2) For ASO/DC (when the last protection incident was ASO or DC protection)

FLD P R T : A S O / D C

(3) For THERMAL (when the last protection incident was THERMALprotection)

FLD P R T : T H E R M A L

When the "STATUS" button is pressed again after the above protection history is displayed, the normal display reappears.

2.3. Clearing the protection history

There are two ways to clear the protection history, as described below.

(1) Start up the error (protection display) mode, display the error, then press and hold in the "ENTER" button for 3 seconds.

FLD : T H E R M A L T H E

Press and hold in the "ENTER" button for 3 seconds

FLD P R T : C L E A R

The above is displayed and the protection history is cleared.

FLD

(2) Initialize.

※If you want to save a backup, use the method in 3.(1) above.

NO PROT E C T

Warning indication by the POWER LED

If the power is turned off when a protection incident has been detected, the POWER LED (red) flashes as a warning ac­cording to the conditions in which the protection incident occurred.

(1) ASO/DC PROTECTION : Flashes in cycles of 0.5 seconds (0.25 seconds lit, 0.25 seconds off)

(2) THERMAL PROTECTION : Flashes in cycles of 2 seconds (1 second lit, 1 second off)

19

AVR-1910/1620/1610/790/590

ADJUSTMENT

5CH AMP UNIT (1610/1620/590 model)
7CH AMP UNIT (1910/790 model)

7CH AMP UNIT (1910/790 model)

DC Voltmeter

F Lch

S Lch

C ch

S Rch

F Rch

S Back Lch

S Back Rch

T1201FL

T1201SL

V1201FL

V1201SL

T1201C

V1201C

T1201SR

V1201SR

T1201FR

V1201FR

T1201SBL

V1201SBL

T1201SBR

V1201SBR

Audio Section

Idling Current

Required measurement equipment: DC Voltmeter

1. Preparation

(1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room temperature

15 °C ~ 30 °C (59 °F ~ 86 °F).

(2) Presetting

• POWER (Power source switch) OFF

• SPEAKER (Speaker terminal) No load
(Do not connect speaker, dummy resistor, etc.)

2. Adjustment

(1) Remove top cover and set VR1201 FL, FR, C, SL, SR, SBL, SBR on 7CH AMP UNIT at fully counterclockwise (c)

position(1910/790 model).

(1’) Remove top cover and set VR1201 FL, FR, C, SL, SR on 5CH AMP UNIT at fully counterclockwise (c) position(1610/

1620/590 model).

(2) Connect DC Voltmeter to test points (FRONT-Lch: TP1201, FRONT-Rch: TP1205, CENTER ch: TP1203, SUR-

ROUND-Lch: TP1202, SURROUND-Rch: TP1204, SURROUND-BACK Lch: TP1207(1910/790 model), SURROUND­BACK Rch: TP1206 (1910/790 model)).

(3) Connect power cord to AC Line, and turn power switch "ON".

(4) Presetting.

MASTER VOLUME : "---" counterclockwise (c min.)
SPEAKER (Speaker terminal) : No load
(Do not connect speaker, dummy resistor, etc.)
MODE : 7CH STEREO (5CH STEREO)
FUNCTION : CD

(5) Within 2 minutes after the power on, turn VR1201 clockwise (x) to adjust the TEST POINT voltage to 1.5 mV ± 0.5 mV

DC.

(6) After 10 minutes from the preset above, turn VR1201 to set the voltage to 2.0 mV ± 0.5 mV DC.

(7) Adjust the Variable Resistors of other channels in the same way.

20

AVR-1910/1620/1610/790/590

TROUBLE SHOOTING

1. POWER

1.1. Power not turn on

Power not turn on

YES

Is the ON/STANDBY indica­tor on the front panel flashing
red?

YES

Is the fuse blown?

YES

Does the power turn on when
the POWER switch is turned
off then back on?

YES YES YES

Check the primary circuitry
parts including the POWER
switch (for poor contacts,
etc.), and replace any defec­tive parts.

Are there any incomplete
connections in the connec-

NO

tors connecting between the
various circuit boards?

YES YES

Connect the connectors
properly.

NO

NO

Refer to Fuse is blown

Is a DC 5V voltage being
supplied from the POWER
B’D (CN1701 pin 4) to the
microprocessor?

Check the microprocessor
periphery circuitry and
replace any defective parts.

Is there a short circuit

NO

between the speaker termi­nals and the ground?

Check for damage in the
power amplifier circuitry parts
and replace any defective
parts.

Is a DC 5V voltage output
when the cord supplying the

NO

power from the SUPPLY B’D
to the microprocessor
(CP1700) is unplugged?

Check the circuitry and parts
from CP1700 on the SUP­PLY B’D to the microproces­sor for damage and short­circuits, and replace any
defective parts.

Correct the short circuit

NO

between the speaker and
the ground.

Check the parts from
IC1703 to the primary cir-

NO

cuitry and replace any
defective parts.

1.2. Fuse is blown

YES YES YES

Check for leaks or short cir­cuits in the primary side
parts, and replace any defec­tive parts.

YES YES YES

Fuse is blown

Check for short circuits in the
rectifier diodes and circuitry
of the secondary side rectify­ing circuits, and replace any
defective parts.

After repairing, also replace the fuse.

Check for short circuits in the
power stabilizer unit's regula­tor output terminal and the
ground, and replace any
defective parts.

21

AVR-1910/1620/1610/790/590

2. Analog video

※

※

MONITOR OUT (CVBS/COMPONENT) output NG

When checking operation, select
VCR for the function.

DVR MONITOR OUT(CVBS) Output NG

C

Input

CVBS/S

B

Input

COMPONENT

Input

CVBS/S

When checking operation, select
VCR for the CVBS/S and select
DVD for the COMPONENT.

A

2.1. MONITOR OUT (CVBS/COMPONENT) output NG
DVR MONITOR OUT (CVBS) output NG

AVR-1910/1620/1610/790/590

22

Input S

Input CVBS

OK

OK

Check V±5V，4094_PWR(+5V)

OK

Check input selector and
surrounding circuitry soldering.

Output V：

IC1901 24pin

Input V：

Check output of input selector.

To troubleshooting 1.1
Power not turn on.

+5V：

CN1018 3pin

Check connection of
iPod Doc.

Check input of VIDEO buffer.

Check surrounding circuitry
soldering of OSD IC.

Check input of OSD IC.

Input V：

IC1905 17pin

IC1901 12pin

OK

NG

Check input selector and
surrounding circuitry soldering.

Input

COMPONENT

V±5V

NG

OK

A

Input

CVBS or S

-5V：

CN1018 4pin

4094_PWR(+5V)：

-5V：

CN1018 4pin

To troubleshooting 1.1
Power not turn on.

NG

CN1018 3pin

+5V：

B

Check output of input selector. NG

Output V：

IC1906 3pin

Check output of VIDEO buffer.

IC1905 13pin

NG

Check cable between main unit
and monitor or check monitor.

OK

CN1018 1pin

Check output of VIDEO buffer
(IC19000A) and surrounding
circuitry soldering.

Check output of VIDEO buffer
(IC1904B) and surrounding
circuitry soldering.

NG

OK

NG

NGCheck output of OSD IC.

Output V：

OK

Check cable between main unit
and monitor or check monitor.

IC1907 24pin

IC1907 22pin

IC1907 20pin

Output Y：

Output Cb：

Output Cr：

Check surrounding circuitry
soldering of VIDEO buffer.

AVR-1910/1620/1610/790/590

23

Input S

Input CVBS

-5V：

OK

Check surrounding circuitry
soldering of VIDEO buffer.

OK

Check output of VIDEO buffer
(IC1904B) and surrounding
circuitry soldering.

Output V：

IC1901 33pin

Input V：

IC1901 3pin

OK OK

Check input selector and
surrounding circuitry soldering.

Output V：

IC1906 3pin

Check output of VIDEO buffer. NG Check input of VIDEO buffer. NG

Check output of input selector. NG

C

Input

CVBS/S

CN1018 3pin

4094_PWR(+5V)：

+5V：

Check connection of
iPod Doc.

To troubleshooting 1.1
Power not turn on.

CN1018 4pin

NG

Check V±5V，4094_PWR(+5V)

CN1018 1pin

Check cable between main unit
and monitor or check monitor.

24

AVR-1910/1620/1610/790/590

2.2. HDMI OUT Output NG (AVR-1910/790 model)

※

HDMI OUT output NG

Input

CVBS

Input

S

When checking operation, select
DVD for the function.
(COMPONENT1 input)

Input

COMPONENT

Input

HDMI

To troubleshooting
HDMI/DVI.

D

25

AVR-1910/1620/1610/790/590





OK

※

D

+5V：

CN1018 3pin

Check connector base
soldering of CNT 1 B'D and
incomplete connection of B'D.

To troubleshooting HDMI/DVI.

Unless specified, HDMI B'D part.

OK

Input Cb：

Input Cr：

CN1102 7pin

CN1102 9pin

Input

CVBS/S/OMPONENT

OK

HDMI B'D

Check input of video decoder signal.

To troubleshooting 1.1 Power not
turn on.

Check output of CVBS VIDEO buffer
(IC1900A) of VIDEO B'D and
COMPONENT input selector (IC1907
24,22,20pin).

NG NG

To A or B

Input V：

Input Y：

CN1102 3pin

CN1102 5pin

+1.8V：

L3 and L4

OK

CN1018 4pin

-5V：

CN1018 1pin

4094_PWR(+5V)：

NG

To troubleshooting 1.1
Power not turn on.

OK

NG

Check of power supply voltage .

+3.3V：

Emitter side of Q24 and L2

Check surrounding circuitry
soldering of IC19, IC29 and IC35.

Check of power supply voltage
(VIDEO B'D).

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AVR-1910/1620/1610/790/590

3. HDMI/DVI

3.1. No picture or sound is output

No picture or sound is output

Check the HDMI/DVI cable
connection

Is the HDMI/DVI cable properly
connected?

Are you using an HDMI/DVI
selector, repeater or a device
for improving picture quality?

Are you using a certified HDMI
cable (one with the HDMI
stamp)?

Are you using an HDMI/DVI
cable less than 5 meters in
length?

YES

YES

YES

NO

YES

There may be a problem with

NO

the HDMI/DVI cable. Check the
connection.

Disconnect everything and

YES

connect only the HDMI/DVI
cable to check.

Use a certified HDMI cable

NO

(one with the HDMI stamp).

Replace the HDMI/DVI cable
with one that is less than 5

NO

meters in length (2 meters
recommended) to check.

YES

Are the picture and sound
output when another HDMI/DVI
cable is used?

NO

Checking the DVD player

YES

Is the DVD player's HDMI
output setting correct?

YES

When using a DENON DVD player, is the fluorescent display tube's
"HDMI" indicator lit?
If using a non-DENON DVD player, proceed to "YES".

YES

Are the picture and sound

NO

Is sound output from the set's speaker terminals when the TV's power is
turned off or the connection cable between the TV and the set is
disconnected?

output when the DVD player's
resolution is changed?

NO

The HDMI/DVI cable is

YES

defective.

Check the HDMI output setting,

YES

referring to the DVD player's
operating instructions.

Set the DVD player's output

YES

resolution to a resolution with
which the TV is compatible.

The DVD player may not be
compatible with HDCP

YES

repeaters. Ask the DVD
player's manufacturer.

NO

Are the picture and sound
output when a different DVD
player is used?

NO

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AVR-1910/1620/1610/790/590

YES

The DVD player is defective.

Check the TV

Is the TV HDCP-compatible?

YES

Is the TV compatible with resolutions of 1080P?

YES

Is the TV's input set to HDMI?

YES

Use an HDCP-compatible TV.

NO

PC TVs cannot be used.

If the TV is not compatible with
resolutions of 1080P, no picture

NO

will be output, even if the DVD
player's resolution is set to
1080P.

Check the TV's input setting,

NO

referring to the TV's operating
instructions.

Are the picture and sound output when a different TV is used?

YES

Check the set (AVR-4310CI)

Is the set's input set to HDMI?

YES YES

The set does not recognize the TV.

Is the TV information properly displayed on the "Monitor info." display
menu?
Is IC5 pin 3 "H" (3V-5V)? With the TV connected, check the voltage of
the IC on the side on which the TV is connected.

YES

The DVD player does not
recognize the connection

When using a DENON DVD
player, is the fluorescent
display tube's "HDMI" indicator
lit?
If using a non-DENON DVD
player, proceed to "NO".

with the set.

Is the HDMI connector (JACK1/

NO

JACK2/JACK3/JACK4) pin 19
"H" (5V)? With the DVD player
connected, check the voltage
of the HDMI connector for the
input on the side on which the
DVD player is connected.

NO

The TV is defective.

Check the set's input setting,

NO

referring to the set's operating
instructions.

The pattern and circuit from
the HDMI connector (JACK5)
to the IC (IC5) is defective, or

NO

the HDMI output circuitry is
defective.
(IC5/IC31 and surrounding
circuitry)

The pattern and circuit from
the HDMI connector (JACK1/

NO

JACK2/JACK3/JACK4) to the
IC1045 is defective.

YES YES

The HDMI output circuitry is defective.

(IC1/IC31/IC5 and surrounding circuitry)

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AVR-1910/1620/1610/790/590

BLOCK DIAGRAM

AUDIO BLOCK DIAGRAM

29

AVR-1910/1620/1610/790/590

VIDEO BLOCK DIAGRAM

30

AVR-1910/1620/1610/790/590