Pioneer VSX-418, VSX-418-K Service Manual

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION

2008

MASTER VOLUME

VSX-418

STANDBY/ON

PHONES

DVD

TVDVD 5.1

DVR

CD-R

MIDNIGHT/ LOUDNESS

VSB MODE

SIGNAL SELECT

SOUND

RETRIEVER

PORTABLE

SLEEP

PHASE

CONTROL

INPUT

SELECTOR

ADVANCED SURROUND

STEREO /

A.L.C.

STANDARD

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

DIALOGUE

ENHANCEMENT

PHASE CONTROL

AUTO SURR / STREAM DIRECT

VSX-418-K

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

VSX-418-K

VSX-418-S

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

Model Type Power Requirement Remarks

VSX-418-K MYSXJ5 AC 220 V to 230 V

VSX-418-S MYSXJ5 AC 220 V to 230 V

ORDER NO.

RRV3737

For details, refer to "Important Check Points for good servicing".

T- Z Z K M A R .

2008 Printed in Japan

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician.

WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm.

Health & Safety Code Section 25249.6 Ð Proposition 65

NOTICE (FOR CANADIAN MODEL ONLY) Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement parts must be of identical designation.

REMARQUE (POUR MODÈLE CANADIEN SEULEMENT) Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que les pièces de remplacement doivent avoir la même désignation.

ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appliance have special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual.

Electrical components having such features are identified by marking with a on the schematics and on the parts list in this Service Manual. The use of a substitute replacement component which does not have the same safety characteristics as the PIONEER recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards.

Product Safety is continuously under review and new instructions are issued from time to time. For the latest information, always consult the current PIONEER Service Manual. A subscription to, or additional copies of, PIONEER Service Manual may be obtained at a nominal charge from PIONEER.

(FOR USA MODEL ONLY)

1. SAFETY PRECAUTIONS

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

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester such as Simpson Model 229-2 or equivalent between the earth ground and all exposed metal parts of the appliance (input/output terminals, screwheads, metal overlays, control shaft, etc.). Plug the AC line cord of the appliance directly into a 120V AC 60 Hz outlet and turn the AC power switch on. Any current measured must not exceed 0.5 mA.

Device under test

Leakage current tester

Earth ground

Reading should not be above

0.5 mA

Also test with plug reversed (Using AC adapter plug as required)

Test al l exposed metal surfaces

AC Leakage Test

2 3 4

SAFETY INFORMATION

2 3 4

VSX-418-K

6 7 8

VSX-418-K

6 7 8

2 3 4

SAFETY INFORMATION ..........................................................................................................................................................2

1. SERVICE PRECAUTIONS ....................................................................................................................................................5

1.1 NOTES ON SOLDERING ...............................................................................................................................................5

1.2 AMPLIFIER FAILURE DIAGNOSIS FLOW CHART........................................................................................................5

2. SPECIFICATIONS .................................................................................................................................................................6

2.1 SPECIFICATIONS...........................................................................................................................................................6

2.2 PANEL FACILITIES .........................................................................................................................................................7

3. BASIC ITEMS FOR SERVICE.............................................................................................................................................12

3.1 CHECK POINTS AFTER SERVICING..........................................................................................................................12

3.2 PCB LOCATIONS .........................................................................................................................................................13

4. BLOCK BIAGRAM...............................................................................................................................................................14

4.1 OVERALL WIRING CONNECTION DIAGRAM ............................................................................................................14

4.2 BLOCK DIAGRAM ........................................................................................................................................................16

4.3 DSP BLOCK DIAGRAM................................................................................................................................................18

5. DIAGNOSIS.........................................................................................................................................................................19

5.1 DIAGNOSIS FLOWCHART...........................................................................................................................................19

5.2 DETECTION CIRCUIT..................................................................................................................................................23

5.3 AMPLIFIER SYSTEM PROTECTION OPERATION SPECIFICATION .........................................................................25

6. SERVICE MODE .................................................................................................................................................................26

7. DISASSEMBLY....................................................................................................................................................................27

8. EACH SETTING AND ADJUSTMENT ................................................................................................................................29

9. EXPLODED VIEWS AND PARTS LIST...............................................................................................................................30

9.1 PACKING SECTION .....................................................................................................................................................30

9.2 EXTERIOR SECTION...................................................................................................................................................32

9.3 REAR PANEL SECTION...............................................................................................................................................34

9.4 FRONT PANEL SECTION ............................................................................................................................................36

10. SCHEMATIC DIAGRAM ....................................................................................................................................................38

10.1 MAIN ASSY (1/3) ........................................................................................................................................................38

10.2 MAIN ASSY (2/3) ........................................................................................................................................................40

10.3 MAIN ASSY (3/3) ........................................................................................................................................................42

10.4 DSP ASSY (1/2)..........................................................................................................................................................44

10.5 DSP ASSY (2/2)..........................................................................................................................................................46

10.6 POWER PACK (1/2) and TRANS2 ASSY ...................................................................................................................48

10.7 POWER PACK ASSY (2/2) .........................................................................................................................................50

10.8 5.1CH INPUT and TRANS3 ASSYS...........................................................................................................................52

10.9 FRONT DISPLAY, ROTARY ENCODER, POWER KEY and JOG ASSYS .................................................................54

10.10 FRONT MINI JACK, DIGITAL INPUT, REGULATOR and HEAD PHONE ASSYS....................................................56

10.11 VIDEO and PRIMARY ASSYS ..................................................................................................................................58

11. PCB CONNECTION DIAGRAM ........................................................................................................................................60

11.1 DSP ASSY ..................................................................................................................................................................61

11.2 MAIN ASSY ................................................................................................................................................................62

11.3 POWER PACK ASSY..................................................................................................................................................66

11.4 TRANS2 and TRANS3 ASSYS...................................................................................................................................70

11.5 5.1CH INPUT and HEAD PHONE ASSYS .................................................................................................................72

11.6 FRONT MINI JACK ASSY...........................................................................................................................................73

11.7 FRONT DISPLAY, ROTARY ENCODER, POWER KEY and JOG ASSYS .................................................................74

11.8 DIGITAL INPUT ASSY ................................................................................................................................................78

11.9 REGULATOR ASSY....................................................................................................................................................79

11.10 PRIMARY ASSY .......................................................................................................................................................80

11.11 VIDEO ASSY ............................................................................................................................................................82

12. ELECTRICAL PARTS LIST ...............................................................................................................................................83

2 3 4

VSX-418-K

• For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit. Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs accompanied by reworking of soldering.

• Compared with conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 °C. Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 °C in general, although the temperature depends on the heat capacity of the PC board on which reworking is required and the weight of the tip of the soldering iron.

Do NOT use a soldering iron whose tip temperature cannot be controlled.

Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting temperatures (hard to melt/easy to harden).

The following lead-free solders are available as service parts:

• Parts numbers of lead-free solder: GYP1006 1.0 in dia. GYP1007 0.6 in dia. GYP1008 0.3 in dia.

Amplifier failure diagnosis flow chart

When DC detection is activated ("AMP_ERR" flashes on the display), failure (damage) of the power amplifier section is considered.

Caution: When releasing the lock state of power key before repair, please be careful because there is the possibility that more damages will occur when turning on the power once again!

• According to a symptom, perform the following confirmation beforehand.

1) Are there any Fuses and IC protectors open? ↓

2) After turn on the power, confirm that the supply voltage of the point that can be measured is appropriate. (Particularly the supply voltage of the power Tr and drive step) ↓

3) Whether the voltage of pin2 and pin5 of IC601 or IC603 is equal to (VL-0.7V). If not (eg, equal to VH), then change the corresponding power pack IC601 or IC603. ↓

4) Furthermore, check the output DC voltage of each channel of power pack IC601 and IC603 to limit the failure channel and identify the defect power pack.

↓

• After identify the failure channel, check that each part is not damaged (resistor, diode... etc. value / open / short)

6 7 8

1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

1.2 AMPLIFIER FAILURE DIAGNOSIS FLOW CHART

6 7 8

VSX-418-K

Accessories

Remote control (VSX-418-K : XXD3169) (VSX-418-S : XXD3168)

AM loop antenna (ATB7013)

FM wire antenna (ADH7030)

AA size IEC R6 Dry cell batteries (x2)

RECEIVER

INPUT SELECT

SOURCE

TV DVR

AMFM

CD-R

DVD 5.1

PORTABLE

TV CTRL

DVD

RECEIVER

RECEIVER CONTROL

TV CONTROL

PARAMETER

TOP MENU

T.EDI T

RETURNSETUP

GUIDE

PTY SEARCH

ENTER

TUNE

ST ST

MPX

EON

DIMMER SLEEP

D.ACCESS

SIGNAL SEL

TV CH

INPUT

SELECT

RECEIVER

MULTI CONTROL

MASTER

VOLUME

ONE TOUCH

COPY

CH+CH

AUTO/DIRECT

PHASE

MUTE

ADV SURR

SOUND

RETRIEVER

STEREO/

A.L.C.

QUICK

SETUP

CH SEL

STANDARD

DIALOG

LEVEL

REC

JUKEBOX

SUBTITLE

AUDIO

DVD

REC STOP

HDD

TUNER DISP

CLASS

DISC

ENTER

INFO

SHIFT

TV VOL

MIDNIGHT

ANALOG ATT

Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories.

“DTS” is a registered trademark of DTS, Inc. and “DTS 96/24” is a trademark of DTS, Inc.

Amplifier section

• Continuous power output (stereo)

Front . . . . . . . . . . . . . . . . . . . . . . . .100 W + 100 W

(DIN 1 kHz, THD 1.0 %, 8

Ω)

• Rated power output

(surround / 20 Hz to 20 kHz, THD 0.06 %, 8 Ω)

Front . . . . . . . . . . . . . . . . . . . . . .95 W per channel

Center. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 W

Surround. . . . . . . . . . . . . . . . . . .95 W per channel

• Rated power output

(surround / 1 kHz, THD 1.0 %, 8 Ω)

Front . . . . . . . . . . . . . . . . . . . . .130 W per channel

Center. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 W

Surround . . . . . . . . . . . . . . . . .130 W per channel

Audio section

• Input (Sensitivity/Impedance)

CD, CD-R/TAPE/MD, DVD/BD,

TV/SAT, DVR/VCR . . . . . . . . . . . . .335 mV/47 k

• Frequency response

CD, CD-R/TAPE/MD, DVD/BD,

TV/SAT, DVR/VCR . . . . 5 Hz to 100 000 Hz dB

• Output (Level/Impedance)

CD-R/TAPE/MD, DVR/VCR . . . . . 335 mV/2.2 kΩ

• Tone control

Bass . . . . . . . . . . . . . . . . . . . . . . ± 6 dB (100 Hz)

Treble . . . . . . . . . . . . . . . . . . . . . ± 6 dB (10 kHz)

Loudness . . . . . +10 dB/+5 dB (100 Hz/10 kHz)

(at volume level –50 dB)

• Signal-to-Noise Ratio DIN (Continuous rated power output/ 50 mW)

CD, CD-R/TAPE/MD, DVD/BD,

TV/SAT, DVR/VCR . . . . . . . . . . . . . . 88 dB/64 dB

Video Section

• Input (Sensitivity/Impedance)

DVR/VCR, DVD/BD, TV/SAT . . . . . . .1 Vp-p/75 Ω

• Output (Level/Impedance)

DVR/VCR, MONITOR OUT . . . . . . . .1 Vp-p/75 Ω

• Frequency response

DVR/VCR, DVD/BD,

TV/SAT MONITOR . . . . .5 Hz to 7 MHz dB

Signal-to-Noise Ratio. . . . . . . . . . . . . . . . . . 55 dB

Crosstalk. . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 dB

FM Tuner Section

Frequency Range. . . . . . . .87.5 MHz to 108 MHz

Usable Sensitivity . . . . . . . . Mono: 13.2 dBf, IHF

(1.3 µV/75 Ω)

50 dB Quieting Sensitivity. . . . . . Mono: 20.2 dBf

Stereo: 38.6 dBf

Signal-to-Noise Ratio. . .Mono: 73 dB (at 85 dBf)

Stereo: 70 dB (at 85 dBf)

Distortion. . . . . . . . . . . . . . .Stereo: 0.5 % (1 kHz)

Alternate Channel Selectivity . . 60 dB (400 kHz)

Stereo Separation. . . . . . . . . . . . . . 40 dB (1 kHz)

Frequency Response . . . . . . . . . 30 Hz to 15 kHz

(±1 dB)

Antenna Input (DIN). . . . . . . . .75 Ω unbalanced

AM Tuner Section

Frequency Range . . . . . . . . 531 kHz to 1602 kHz

Sensitivity (IHF, Loop antenna). . . . . . .350 µV/m

Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . .50 dB

Antenna. . . . . . . . . . . . . . . . . . . . . .Loop antenna

Miscellaneous

Power requirements

. . . . . . . . . . . . . . AC 220 V to 230 V, 50 Hz/60 Hz

Power consumption. . . . . . . . . . . . . . . . . . 280 W

In standby . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 W

Dimensions

. . . . .420 mm (W) x 158 mm (H) x 352.5 mm (D)

Weight (without package) . . . . . . . . . . . . . 7.9 kg

Furnished Parts

Remote control . . . . . . . . . . . . . . . . . . . . . . . . . .1

Dry cell batteries (AA size IEC R6). . . . . . . . . .2

AM loop antenna . . . . . . . . . . . . . . . . . . . . . . . . .1

FM wire antenna. . . . . . . . . . . . . . . . . . . . . . . . . .1

Warranty card. . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Operating instructions

Note

• Specifications and the design are subject to possible modifications without notice, due to improvements.

2. SPECIFICATIONS

2.1 SPECIFICATIONS

2 3 4

VSX-418-K

2 3 4

Front panel

1 STANDBY/ON

2 INPUT SELECTOR dial

Selects an input source.

3 Input select buttons

Selects an input source.

4 Character display

SLEEP

Press to change the amount of time before the receiver switches into standby (30 min – 60 min – 90 min – Off). You can check the remaining sleep time at any time by pressing SLEEP once.

6 MASTER VOLUME dial

7 PORTABLE audio input jack

Connect an auxiliary component using a stereo mini-jack cable.

8 PHONES jack

Use to connect headphones (when connected, there is no sound output from the speakers).

9 ST +/–

Use to select preset radio stations.

10 TUNE +/–

Used to find radio frequencies.

MASTER VOLUME

VSX-418

STANDBY/ON

PHONES

DVD TVDVD 5.1

DVR

CD-R

MIDNIGHT/ LOUDNESS

VSB MODE

SIGNAL SELECT

SOUND

RETRIEVER

PORTABLE

SLEEP

PHASE

CONTROL

INPUT

SELECTOR

ADVANCED SURROUND

STEREO /

A.L.C.

STANDARD

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

DIALOGUE

ENHANCEMENT

PHASE

CONTROL

AUTO SURR / STREAM DIRECT

ADVANCED SURROUND

STEREO /

A.L.C.

STANDARD

DIALOGUE

ENHANCEMENT

PHASE

CONTROL

AUTO SURR / STREAM DIRECT

PHONES

MIDNIGHT/ LOUDNESS

VSB MODE

SIGNAL SELECT

SOUND

RETRIEVER

23 4 56

11 12 13 14

15 16

11 SOUND RETRIEVER

Press to restore CD quality sound to compressed audio sources).

12 VSB MODE

Press to switch on/off Virtual Surround Back (VSB) mode.

13 MIDNIGHT/LOUDNESS

Switches to Midnight/Loudness listening.

14 SIGNAL SELECT

Selects an input signal.

15 PHASE CONTROL

Press to switch on/off Phase Control.

16 DIALOGUE ENHANCEMENT

Use to make dialog stand out when watching TV or a movie.

2.2 PANEL FACILITIES

6 7 8

VSX-418-K

6 7 8

17 Listening mode buttons

AUTO SURR/STREAM DIRECT

Switches between Auto surround mode (Auto playback ) and Stream Direct playback. Stream Direct playback bypasses the tone controls for the most accurate reproduction of a source.

STEREO/A.L.C.

Switches between stereo playback, Auto level control stereo mode and Front Stage Surround Advance modes.

STANDARD

Press for Standard decoding and to switch between the various ∂ Pro Logic II options.

ADVANCED SURROUND

Switches between the various surround modes.

OUT

DVD / BD

TV /

SAT

FRONT DVD5.1

CH INPUT

DVR /

VCR

DVR /

VCR IN

TV /

SAT IN

DVD /

BD IN

LOOP

DIGITAL IN

CEN TER

SUB WOOFER

SURROUND

DVD 5.1CH INPUT

OPT

FM UNBAL

ANTENNA

DVR /

VCR OUT

MONITOR OUT

AUDIO VIDEO

OUT

COAX

(

DVD

)

CD-R /

TAPE

(

ASSIGNABLE

)

(CD)

COAX

(

DVR/

VCR

)

DIGITAL IN

(

ASSIGNABLE

)

RETNECDNUORRUSTNORF

RLL

S P E A K E R S

SUB WOOFER PREOUT

2 3 4

VSX-418-K

Display

1 SIGNAL indicators

Lights to indicate the type of input signal assigned for the current component:

AUTO Lights when AUTO signal select is on.

DIGITAL

Lights when a digital audio signal is detected.

∂ DIGITAL

Lights when a Dolby Digital encoded signal is detected.

ANALOG

Lights when an analog signal is detected.

DTS

Lights when a source with DTS encoded audio signals is detected.

EON R

117654321 8 910

16 1715 1814 19

Lights to indicate decoding of a DTS multichannel signal.

3 ∂ DIGITAL

Lights to indicate decoding of a Dolby Digital multichannel signal.

4 ∂ PRO LOGIC II

Lights to indicate Pro Logic II decoding.

5 VIR.SB

Lights during Virtual surround back processing.

6 DIRECT

Lights when source Stream Direct playback is in use. Direct playback bypasses the tone controls for the most accurate reproduction of a source.

7 AUTO SURR.

Lights when the Auto Surround feature is switched on.

8 ATT

Lights when ANALOG ATTis used to attenuate (reduce) the level of the analog input signal.

9 SLEEP

Lights when the receiver is in sleep mode.

10 Tuner indicators

/ MONO Lights when the mono mode is set using the MPX button.

/ STEREO Lights when a stereo FM broadcast is being received in auto stereo mode.

/ TUNED

Lights when a broadcast is being received.

11 EON/RDS indicators

EON

Lights when the EON mode is set, and flashes during an EON broadcast. The

indicator lights when the current station carries the EON service.

RDS

Lights when an RDS broadcast is received.

12 Speaker indicator

Shows if the speaker system is on or not.

SP A means the speakers are switched on.

SP means the headphones are connected.

13 Character display

ADV.SURR. (Advanced Surround)

Lights when one of the Advanced Surround modes has been selected.

15 WMA9 Pro

Lights to indicate decoding of a WMA9 Pro signal.

16 MIDNIGHT

Lights during Midnight listening.

17 D.E.

Lights when Dialog Enhancement is switched on.

18 LOUDNESS

Lights during Loudness listening.

19 Master volume level

6 7 8

VSX-418-K

6 7 8

LEVEL +/–

Use to adjust the channel levels.

MASTER VOLUME +/–

Use to set the listening volume.

5 System Setup and Component control buttons

The following button controls can be accessed after you have selected the corresponding

MULTI CONTROL button (DVD,DVR, RECEIVER, etc.).

AV PARAMETER

Use to access the AV options.

TOP MENU

Displays the disc ‘top’ menu of a DVD.

ONE TOUCH COPY*

Copies the currently playing title from DVD to HDD or vice-versa.

Remote control

1 INPUT SELECT Use to select the input source (use SHIFT for INPUT SELECT ).

2 RECEIVER

Switches the receiver between standby and on.

3 MULTI CONTROL buttons

Press to select control of other components.

PORTABLE, DVD 5.1 and CD-R

buttons can be

used with

SHIFT button.

4 RECEIVER CONTROL buttons

AUTO/DIRECT

Switches between Auto surround mode (Auto playback) and Stream Direct playback. Stream Direct playback bypasses the tone controls for the most accurate reproduction of a source.

STEREO/A.L.C.

Switches between stereo playback, Auto level control stereo mode and Front Stage Surround Advance modes.

STANDARD

Press for Standard decoding and to switch between ∂ Pro Logic II options.

ADV SURR

Switches between the various surround modes.

PHASE

Press to switch on/off Phase Control.

QUICK SETUP

DIALOG

Use to make dialog stand out when watching TV or a movie.

SOUND RETRIEVER

Press to restore CD quality sound to compressed audio sources.

MUTE

Mutes/unmutes the sound.

CH SEL

Press repeatedly to select a channel, then use LEVEL +/– to adjust the level.

RECEIVER

INPUT SELECT

SOURCE

TV DVR

AMFM

CD-R

DVD 5.1

PORTABLE

TV CTRL

DVD

RECEIVER

RECEIVER CONTROL

TV CONTROL

AV PARAMETER

TOP MENU

T. ED I T MENU

RETURNSETUP

GUIDE

PTY SEARCH

ENTER

TUNE

ST ST

MPX

EON

DIMMER SLEEP

D.ACCESS

SIGNAL SEL

TV CH

INPUT

SELECT

RECEIVER

MULTI CONTROL

MASTER VOLUME

ONE TOUCH

COPY

AUTO/ DIRECT

PHASE

MUTE

ADV SURR

SOUND

RETRIEVER

STEREO/

A.L.C.

QUICK

SETUP

CH SEL

STANDARD

DIALOG

LEVEL

REC

JUKEBOX

SUBTITLE

AUDIO

DVD

REC STOP

HDD

TUNER DISP

CLASS

DISC

ENTER

INFO

SHIFT

TV VOL

MIDNIGHT

ANALOG ATT

2 3 4

VSX-418-K

2 3 4

8 Number buttons and other component controls

Use the number buttons to directly select a radio frequency or the tracks on a Pioneer DVD/DVR units. There are other buttons that can be accessed after the

RECEIVER button is pressed. (For example MIDNIGHT, etc.)

TUNER DISP*

Switches between named station presets and radio frequencies.

CLASS*

Switches between the three banks (classes) of radio station presets.

MPX*

Switches between stereo and mono reception of FM broadcasts. If the signal is weak then switching to mono will improve the sound quality.

D.ACCESS*

After pressing, you can access a radio station directly using the number buttons.

MIDNIGHT

Switches to Midnight or Loudness listening.

ANALOG ATT

Attenuates (lowers) the level of an analog input signal to prevent distortion.

DIMMER

Dims or brightens the display.

SLEEP

Press to change the amount of time before the receiver switches into standby (30 min – 60 min – 90 min – Off). You can check the remaining sleep time at any time by pressing SLEEP once.

SIGNAL SEL

Use to select an input signal.

EON*

Use to search for programs that are broadcasting traffic or news information.

9 INFO

Displays additional EPG information

on a

DVD/DVR.

10 SHIFT

Press to access the ‘boxed’ commands (above the buttons) on the remote. These buttons are marked with an asterisk (* ) in this section.

11 Remote control LED

Lights when a command is sent from the remote control.

SOURCE

Turns on or off the power of the Pioneer DVD/ DVR units when DVD or DVR is selected using the MULTI CONTROL buttons.

13 RECEIVER

Switches the remote to control the receiver (used to select the green commands above the number buttons (SETUP, etc)). Also use this button to set up surround sound.

14 TV CONTROL buttons

These buttons can control only be used with Pioneer flat screen TVs.

Use to turn on/off the power of the TV.

INPUT SELECT

Use to select the TV input signal.

TV CH +/–

Use to select channels.

TV VOL +/–

Use to adjust the volume on your TV.

GUIDE

Displays/changes the subtitles on multilingual DVDs.

PTY SEARCH

Use to search for RDS program types.

SETUP

Press to access the System Setup menu. Also functions as the SETUP button for DVD/DVR units.

T.EDIT

Memorizes/names stations for recall.

Displays the disc menu of DVD-Video discs.

RETURN

Confirm and exit the current menu screen.

CH +/–*

Use to select channels for DVD/DVR units.

6 (TUNE , ST ), ENTER

Use the arrow buttons when setting up your surround sound system. Also used to control DVD menus/options.

Use the TUNE buttons can be used to find radio frequencies and the ST buttons can be used to select preset radio stations.

7 Component control buttons

Use these buttons to control a Pioneer DVD player or recorder connected to your system. These buttons can be accessed after the DVD

or DVR button is pressed.

Button What it does

Starts/resumes normal playback. Pauses/unpauses a disc. Stops playback.

/ Press to start fast reverse/forward

scanning. Skips to the start of the current track

or chapter, then previous tracks/ chapters.

Skips to the next track or chapter.

REC* Starts recording.

REC STOP

* Stops recording.

SUBTITLE

Displays/changes the subtitles on multilingual DVD-Video discs.

AUDIO

Changes the audio language or channel on DVD discs.

HDD*, DVD*

Switch between the hard disk and DVD controls for DVR.

JUKEBOX

Display the jukebox screen.

6 7 8

VSX-418-K

6 7 8

To keep the product quality after servicing, confirm recommended check points shown below.

No.

Procedure Check points

Confirm whether the customer complain has been solved. If the customer complain occurs with the particular source, such as Dolby Digital, DTS, AAC, DVD-A and HDMI, input it for the operation check.

The customer complain must not be reappeared. Video, Audio and operations must be normal.

Check the analog audio playback. (Make the analog connections with a DVD player.)

Each channel audio and operations must be normal.

Check the digital audio playback. (Make the digital connections with a DVD player.)

Each channel audio and operations must be normal.

Check surround playback. (Select Surround mode and check the multichannel operations via the DSP circuit.)

Each channel audio and operations must be normal.

Check the video outputs. (Connect with a DVD player.)

Video and operations must be normal.

Check the sound from headphone output. Sound must be normal, without noise.

Check the appearance of the product. No scratches or dirt on its appearance after receiving

it for service.

See the table below for the items to be checked regarding video and audio:

Items to be checked regarding video Item to be checked regarding audio

Block noise Distortion Horizontal noise Noise Dot noise Volume too low Disturbed image (video jumpiness) Volume too high Too dark Volume fluctuating Too bright Sound interrupted Mottled color

Before shipping out the product, be sure to clean the following positions by using the prescribed cleaning tools:

CLEANING

Position to be cleaned Cleaning tools

Fans Cleaning paper : GED-008

2 3 4

3. BASIC ITEMS FOR SERVICE

3.1 CHECK POINTS AFTER SERVICING

2 3 4

VSX-418-K

FRONT DISPLAY

ASSY

ROTARY ENCODER ASSY

MAIN ASSY

FRONT MINI JACK ASSY

REGULATOR ASSY

POWER PACK ASSY

DSP ASSY

POWER KEY

ASSY

TRANS 3

ASSY

BIND

ASSY

PRIMARY

ASSY

TRANS 2

ASSY

HEADPHONE

ASSY

FM/AM TUNER UNIT

VIDEO ASSY

DIGITAL INPUT ASSY

5.1CH INPUT ASSY

1..DSP ASSY AWX8980

NSP 1..COMPLEX ASSY XWK3332

2..FRONT DISPLAY ASSY XWZ4283

2..ROTARY ENCODER ASSY XWZ4286

2..POWER KEY ASSY XWZ4287

2..JOG ASSY XWZ4289

2..VIDEO ASSY XWZ4291

2..FRONT MINI JACK ASSY XWZ4296

2..DIGITAL INPUT ASSY XWZ4298

2..PRIMARY ASSY XWZ4302

2..REGULATOR ASSY XWZ4315

2..HEADPHONE ASSY XWZ4321

NSP 1..AMP ASSY XWK3346

2..POWER PACK ASSY XWZ4323

2..TRANS 2 ASSY XWZ4334

2..TRANS 3 ASSY XWZ4337

2..5.1CH INPUT ASSY XWZ4341

2..BIND ASSY XWZ4344

1..MAIN ASSY

WK3356

1..FM/AM TUNER UNIT AXX7170

Mark No. Description Part No. Mark No. Description Part No.

LIST OF ASSEMBLIES

NOTES: - Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

JOG ASSY

3.2 PCB LOCATIONS

6 7 8

VSX-418-K

6 7 8

11/120

1912

5/280

XDD3248

15/230

13/170

7/190

11/200

3/300

CN603

CN901

CN805

13 19 15

CN816

CN111

CN815

CN827

CN701

CN109

CN704

CN807

CN951

CN110

CN813

1915

XDD3251

CN122

CN108

CN101

17/110

1905

CN130

XDD3259

1907

CN105

CN803

CN302

CN1903

CN103

1919

XDD3235

1911

CN304

CN307

XDD3189

CN701

CN252

XDX3066

810

CN702

J43

CN251

CN800

971

5/125

J42

D15A05-125-2651

511

XDD3200

XDX3064

CN401

404

J22

WIRE INDICATION

7: Number of contacts (pin)

140: Insulation length (mm)

E.g. 7/140

XXM3012

FAN

A 1/3 - A 3/3

FRONT DISPLAY ASSY (XWZ4283)

DIGITAL INPUT ASSY (XWZ4298)

5.1CH INPUT ASSY (XWZ4341)

MAIN ASSY

(XWK3356)

VIDEO ASSY (XWZ4291)

POWER PACK ASSY (XWZ4323)

REGULATOR ASSY (XWZ4315)

DSP ASSY

C 1/2 -

C 2/2

ROTARY ENCODER ASSY (XWZ4286)

FRONT MINI JACK ASSY (XWZ4296)

(AWX8980)

FM/AM TUNER

UNIT (AXX7170)

(Note : No schematic diagram)

2 3 4

4. BLOCK BIAGRAM

4.1 OVERALL WIRING CONNECTION DIAGRAM

VSX-418-K

2 3 4

6/400

AC CORD

FU1

CN51

11/300

J21

D20PYY1130E

D20PYY0410E

J52

4/100

CN1201

851

J47

XDX3065

891

J5J7 J4J3 J6

1551

470

D15A03-100-2651

471

D15A03-100-2651

J44

3/100

512

J41

3/100

501

2.0mm CABLE CONNECTOR

1.5mm FLAT CABLE

1.25mm FFC

1.25mm REVERSE FFC

2.0mm FLAT CABLE

1.25mm FFC CONNECTOR

1.5mm CABLE HOLDER

2.0mm CABLE HOLDER

1.0mm FFC

PH CONNECTOR

B*B-PH-K-S

B*B-EH EH CONNECTOR

BOARD IN

1.0mm FFC CONNECTOR

1.25mm FFC CONNECTOR(L)

AC CODE CONNECTOR

1.25mm BOARD to BOARD PLUG

1.25mm BOARD to BOARD SOCKET

AC CODE SOCKET

2.0mm BOARD to BOARD SOCKET

2.0mm BOARD to BOARD PLUG

MAIN TRANS

ZWNH1672G22-6-21J

Y1 (N)

Y2 (L)

Y6 (L)

ZWNH1672G 22-4-15J

BROWN

BLUE

ZWNH1672G22-1-22J

230V,50Hz

YELLOW

120V

BROWN

YELLOW

42365 1

YELLOW

BLUE

110V

Y4 Y3 Y5Y7 Y8

10V

MAIN TRANS

TRANS2 ASSY (XWZ4334)

(XWZ4302)

PRIMARY ASSY

TRANS3 ASSY (XWZ4337)

POWER KEY ASSY (XWZ4287)

JOG ASSY (XWZ4289)

HEAD PHONE ASSY (XWZ4321)

When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS

LIST" or "PCB PARTS LIST".

The > mark found on some component parts indicates the importance of the safety

factor of the part. Therefore, when replacing, be sure to use parts of identical designation.

: The power supply is shown with the marked box.

6 7 8

VSX-418-K

CN307 CN105

SL/SR

OPT1

COAX1

COAX2

(DIR)

CD-R OUT

VCR/DVR OUT

(ADC)

LPF

(for DECODE)

DSPC56371AF180

DSP IC

CN701

CN603CN1903

CN109

(SW)

NJM4565

IC104

AK4114VQ

(SL/SR)

(C)

IC103

IC104

AK4626AVQ

(CODEC)

(DAC)

(FL/FR)

IC105

DVD/LD

CD-R/TAPE

TV/SAT

L/R

Front Audio

VCR/DVR

L/R

(For MCACC Setup)

MODULE

TUNER

L/R

BLOCK DIAGRAM FOR VSX-418

DSP ASSY

5.1CH INPUT ASSY

DIGITAL INPUT ASSY

MAIN ASSY

4.2 BLOCK DIAGRAM

2 3 4

VSX-418-K

2 3 4

GND

DVR REC

MONITOR

TV/SAT

DVD/LD

CN310

DVR

(COMPOSITE SEL)

NJM2595M

POWER PACK ASSY

IC301

R299

STBY

OSD

IC302

NJM2243M

(VIDEO/OSD SEL)

IC851

(PDC132A)

CN111 CN302

(SL/SR)

(C)

SW1

SW2

A. MUTE

Q303

SW PREOUT

Q631

30dB

RY753

A. MUTE

Q651

30dB

RY752

SL/SR

Ton e

(FL/FR)

EVOL/SELECTOR

IC108

9.5dB

BD3474KS2

FUNCTION

SELECTOR

CN110 CN704

CN702

IC601 (1/2) IC603 (2/3)

IC601 (2/2) IC603 (3/3)

IC603 (1/3)

: AUDIO SIGNAL FLOW

: VIDEO SIGNAL FLOW

Q601

30dB

RY751

FL/FR

Q1551

A. MUTE

1551

HEAD PHONE ASSY

POWER PACK ASSY

VIDEO ASSY

6 7 8

VSX-418-K

6 7 8

DSP ASSY Block Diagram

PQ1LAX95MSPQ PQ1LAX95MSPQ

1.25V 3.3V

Analog 2ch in(1)

24.576MHz

SPDIF out(2)

Analog 8ch OUT

6ch OUT(AWX8980 only)

COAX in(2)

SPDIF in(5)

AWX8805,

AWX8806

AWX8805,AWX8809 only

only

XM in

XM Analog 2ch OUT

AWX8809,

STBY

AWX8810, AWX8812,

AWX 8980

only

A5V

D5V

DIR

AK4114VQ

TC74VHC157

CODEC

AK4626AVQ

SDTO LRCK,BCLK OUT

DSP

DSPC56371AF180

LRCK,BCLK IN SDTI MCLK

TC7WH125

SERIAL ROM

PDC151A8 for

AWX8809, AWX8810

PDC152A8 for

AWX8805, AWX8806

XMDT

F2621E-01

DAC

AK4387ET

Lip Sync

ML87V5002

AWX8805, AWX8809 only

Control in

Control out

5 3

LEVEL

SHIFTER

TC74VHC08

3 5

LEVEL

SHIFTER

TC74VHCT08

3 5

LEVEL

SHIFTER

TC74VHCT541

IC801

IC871

IC802

X801

IC851

IC953

IC951

IC901IC902

IC952

IC601

IC401

IC751

IC851

IC551

IC701

DSP ASSY (VSX-418 : AWX8980)

4.3 DSP BLOCK DIAGRAM

2 3 4

VSX-418-K

2 3 4

• When a sound is not out in the multi-CH signal playback mode or surround mode with the digital signal input. (SurroundBack is not output by setting.)

• Suppose CR to be normal contact and that is not damaged.

• This shows failure analysis of DSP Assy.

Step 4: 3 V to 5 V conversion

Step 2: BtoB connector

Step 1: MUTE pin

CN901, CN701, CN951

Are the

connectors securely

inserted?

Turn the power off and insert the connectors securely.

IC952 (pin 18)

convert 3 V into

5 V for pin 2

input?

Replace IC801.

Replace IC901.

Replace IC902.

Ye s

To Step 3

To Step 2

To Step 4

Step 0: Preliminary confirmation

Confirm the following items before checking

Do screws

of COAX Jack

securely tighten

Tighten screws securely.

Ye s

To Step 1

IC801 (pin 54)

Is the

voltage of output

signal 0 V

Replace IC952.

Ye s

MUTE

Troubleshooting for all destination

Step 3: Regulator IC

Check the CN901 and REGULATOR assy.

IC901 (pin 4)

Is the

voltage of around

5 V to 5.3 V

input?

Ye s

(to chassis)

IC902 (pin 5)

Is the

voltage of 1.25 V

output?

(to chassis)

IC901 (pin 5)

Is the

voltage of 3.3 V

output?

Ye s

IC952 (pin 17)

convert 3 V into

5 V for pin 3

input?

Replace IC952.

Ye s

IC952 (pin 16)

convert 3 V into

5 V for pin 4

input?

Replace IC952.

Ye s

IC952 (pin 15)

convert 3 V into

5 V for pin 5

input?

Replace IC952.

Ye s

(to chassis)

Part shape and Pin arrangement of IC901 and IC902

6 7 8

5. DIAGNOSIS

5.1 DIAGNOSIS FLOWCHART

VSX-418-K

6 7 8

Step 6: DIR

IC952 (pin 14)

convert 3 V into

5 V for pin 6

input?

To Step 5

Replace IC952.

Check the parts and patterns in the path.

Replace IC601.

Ye s

IC952 (pin 13)

convert 3 V into

5 V for pin 7

input?

Replace IC952.

Ye s

Check the DIGITAL INPUT Assy, and parts and patterns in the path.

Check the path to pin 45 of IC801. Replace IC802.

IC601 (pin 1)

IN1 (OPT: TV/SAT)

Check that the S/PDIF signal is output. Check that changes by pulling out and inserting the digital input lines.

Can

observe the

digital signal

(0 V <-> 4 V)

Ye s

Check the DIGITAL INPUT Assy, and parts and patterns in the path.

IC601 (pin 5)

IN2 (OPT: CD-R/TAPE/MD)

Can

observe the

digital signal

(0 V <-> 4 V)

Ye s

IC601 (pin 44)

IN3 (COAX: DVD/LD)

Can

observe the

digital signal

Ye s

Check that the data and clock signals are output.

(0 V <-> 3.3 V)

Ye s

IC601 (pin 42)

IN4 (COAX: CD)

Can

observe the

digital signal

(1.65 V center, amplitude more than 0.2 Vp-p)

Check the other assy. (surrounding of the microcomputer)

IC601 (pin 27)

MCKO2 (Master clock)

Ye s

Is there

a master clock

output?

IC601 (pin 24)

LRCK (LR clock)

Is there

a LR clock

output?

Is the

voltage of PDN

IC601-pin 31

5 V?

Step 5: X'tal

To Step 6

Replace IC802 or X801.

Ye s

IC802 (pin 2)

Is there

a 24.576 MHz

output?

Check the path to pin 30 of IC601. Replace IC802.

Ye s

IC802 (pin 7)

Is there

a 24.576 MHz

output?

Ye s

IC802 (pin 5)

Is there

a 24.576 MHz

output?

2 3 4

VSX-418-K

Step 7: DSP output (digital)

Ye s

Digital output of each CH when inputting the digital signal with audio.

Digital output of each CH when inputting the digital signal (-∞ dB (no audio)).

To Step 8

Replace IC801.

IC801 (pin 6)

Surround L/R data

Is the output

0 V fixing?

Ye s

Replace IC801.

IC801 (pin 7)

Front L/R data

Is the output

0 V fixing?

Replace IC801.

Ye s

IC801 (pin 5)

Center/LFE data

Is the output

0 V fixing?

Replace IC801.

Ye s

IC801 (pin 5)

Center/LFE data

Is there

a data output?

Replace IC801.

Ye s

IC801 (pin 6)

Surround L/R data

Is there

a data output?

Replace IC801.

Ye s

IC801 (pin 7)

Front L/R data

Is there

a data output?

To Step 7

Replace IC601.

Ye s

IC601 (pin 25)

SDTO (Data)

Is there

a data

output?

Replace IC601.

Ye s

IC601 (pin 26)

BCK (Bit clock)

Is there

a bit clock

output?

(0 V <-> 3.3 V)

6 7 8

VSX-418-K

6 7 8

Analog output of each CH when inputting the digital signal (-∞ dB (no audio)).

Replace IC701.

Ye s

IC701 (pin 26)

Surround R out

Is there

a data output?

Replace IC701.

Ye s

IC701 (pin 27)

Front L out

Is there

a data output?

Replace IC701.

Ye s

IC701 (pin 28)

Front R out

Is there

a data output?

Ye s

Replace IC701.

IC701 (pin 23)

Center out

Is the output

2.5 V fixing?

Replace IC701.

Ye s

IC701 (pin 26)

Surround R out

Is the output

2.5 V fixing?

Replace IC701.

IC701 (pin 27)

Front L out

Is the output

2.5 V fixing?

Ye s

Replace IC701.

IC701 (pin 28)

End

Front R out

Is the output

2.5 V fixing?

Ye s

Replace IC701.

IC701 (pin 24)

LFE out

Is the output

2.5 V fixing?

Replace IC701.

IC701 (pin 25)

Surround L out

Is the output

2.5 V fixing?

Step 8: Codec output (analog)

Analog output of each CH when inputting the digital signal with audio.

Replace IC701.

Ye s

IC701 (pin 23)

Center out

Is there

a data output?

Replace IC701.

Ye s

IC701 (pin 24)

LFE out

Is there

a data output?

Replace IC701.

Ye s

IC701 (pin 25)

Surround L out

Is there

a data output?

2 3 4

VSX-418-K

2 3 4

MAIN ASSY

IC9001

(U-P) Pin72

DC PROT

Normal : +5 V DC Detect : 0 V

POWER AMP

XPROTECT

(refer 4)

1. DC Derection Circuit Diagram : Example of VSX-918V/KUXJ/CA

2. Overload Detection Circuit Diagram: Example of VSX-918V/KUXJ/CA FRONT Channel

3. Fan Stop Protection Circuit Diagram

POWER PACK ASSY

MAIN ASSY

IC603(2/3)

R788

R696

C696

C697

R726

D+5V

IC9001

(U-P) Pin72

DC PROT

DC DT

OL DT

Q696

Q697

IC601(1/2)

R628

IC603(3/3)

R694

IC601(2/2)

R674

IC603(1/3)

R623

IC603(2/3)

7pin

R785

R786

D777

R784

R445

Fan Stop DET.

D+5V

+24V

R727

R438

Q505

D778

MAIN ASSY

IC9001

(U-P) Pin73

OL DET

Normal : +5 V OVER LOAD Detect : 0 V

POWER PACK ASSY

XPROTECT

MAIN ASSY

IC9001

(U-P)

Pin 89

XPROTECT

Normal : +5 V FAN abnormal STOP : 0 V

SPEAKER Impedance

Fan Stop

Fan

Fan -

Fan +

Q253

Q252

D+5V

R725

5.2 DETECTION CIRCUIT

6 7 8

VSX-418-K

6 7 8

D713

1SS133

Q702

2SA2005(E)

Q701

2SC5511(E)

D+5V

Voltage supply to POWER AMP IC (V neck-)

Voltage supply to POWER AMP IC (V neck+)

R697

10k

R698

33k

R713

R807 10k

D801 S1WB(A)60SD

D807

D806 MTZJ6.2B

Q807(2/2)

Q807(1/2)

Q808(1/2)

D+5.6V

Q808(2/2)

Q698

Voltage supply to +12 V REGULATOR IC

Voltage supply to -12 V REGULATOR IC

C806 1/50

C801 2200 /25

C802 2200 /25

R806 10k

R808

IC9001

(U-P)

XPROTECT

4. XPROTECT Detection Circuit Diagram

When below 6 kind of voltage supply become to be short circuit to GND, XPROTECT circuit work and U-P input port voltage change from +5 V to 0 V. The U-P detect this condition as ERROR.

• Voltage supply to POWER AMP IC (V neck+)

• Voltage supply to POWER AMP IC (V neck-)

• Voltage supply to +12 V REGULATOR IC

• Voltage supply to -12 V REGULATOR IC

POWER PACK ASSY

MAIN ASSY

2 3 4

VSX-418-K

5.3 AMPLIFIER SYSTEM PROTECTION OPERATION SPECIFICATION

1. DC-abnormality detection

DC detection is only enabled 2 seconds after power-on. If there is a fault in the power amplifier or a high-level signal lower than 5 Hz is input, the DC_DET port becomes “L”. If the “L” is detected, the microprocessor will perform as following flow chart.

In the case of simultaneous detection with the overload protection circuit, DC-abnormality detection is performed preferentially to overload detection.

If the speaker terminals are short-circuited or low-load driving is detected, the OL_DET port becomes “L”. If the “L” is detected, the microprocessor will perform as following flow chart.

*A.MUTE : Audio mute command

↓

The abnormality continues for 3 seconds.

↓ Continues. ↓ Recovery

The power is shut off.

The program restarts.

↓

Power key not effective and POWER LED blinks (only for VSX-918V).

However, when the following keys are pushed so that the key input of a line and the service can be carried out, power can be on.

1 TESTMODE ON (A55F+A55F) 2 When power off, push TUNE+ key + AUTO SURR/DIRECT key continuously 2sec.

(2: When a DC abnormality is detected and the power is shut off.) Any other key input from front panel or remote control will not be detected.

2. Overload detection

↓

The abnormality continues for 3 seconds.

↓ Continues. ↓ Recovery

The power is shut off.

The power is shut off even if the

unit recovers.

When a DC abnormality is detected, A.MUTE* is turned

on, speaker relay is turned off, then "AMP_ERR" flashes on the display.

When an overload is detected, A.MUTE* is turned on,

speaker relay is turned off, then

"OVERLOAD" flashes on the display.

6 7 8

VSX-418-K

6 7 8

However, when the following keys are pushed so that the key input of a line and the service can be carried out, power can be on.

1 TESTMODE ON (A55F+A55F) 2 When power off, push TUNE+ key + AUTO SURR/DIRECT key continuously 2sec.

(Effective, only when power-off is carried out by DC detection / XPROTECT detection) Any other key input from front panel or remote control will not be detected.

XPROTECT is started to be monitored 200msec after power on. XPROTECT port is checked every 20msec. If Low level (ERROR) is recognized during consecutive 9 times, micon judge it as XPROTECT ERROR.

It processes more preferentially than DC abnormal detection and overload detection.

3. XPROTECT detection

↓

↓ ↓

←

Power key not effective (*1) and POWER LED blinks (only for VSX-918V).

↓ after 60sec

↓ after X sec

Power key become effective.

POWER LED continue to blink.

AC OFF

If micon detect XPROTECT = Low

for 200 msec, it judge as error,

and then AMUTE on, speaker relay off

and shut down power supply immediately.

↓

When 200 msec passed after power on,

the XPROTECT detection starts.

Don't detect it during power off.

↓

POWER ON

↓

POWER ON

Then no more POWER LED blinks.

↓

AC ON

↓ after Y sec

When X+Y reach 60sec.

(*1)

4. Fan stop detection operation flow in the XPROTECT detection

If the fan is forcibly stopped or become out of order, the 'XPROTECT' port becomes "L". Then an abnormality of fan is detected.

• Detection routine and recovery is same as "3. XPROTECT detection".

2 3 4

6. SERVICE MODE

There is no information to be shown in this chapter.

2 3 4

VSX-418-K

Remove the two screws.

PRIMARY Assy

Diagnosis of the Unit

Remove the bonnet by removing the six screws.

Remove the one screw.

Remove the two screws.

Remove the one screw.

Remove the push rivet.

Remove the BIND Assy by removing the one screw.

Remove the one screw.

Release the binders, as required.

Rear view

Caution:

Heatsink section in work becomes hot, and be careful with it.

BIND AssyHeatsink

MAIN Assy

Heatsink

Note : Even if the unit shown in the photos and illustrations in this manual may differ from your product, the procedures described here are common.

6 7 8

7. DISASSEMBLY

VSX-418-K

6 7 8

Arrange the unit as shown in the photo below.

Rear panel

POWER PACK Assy

Heatsink

Diagnosis

MAIN Assy

DSP Assy

Be careful with it so that a part of PRIMARY Assy does not touch chassis.

Be careful with it when lifts an AMP. section not to damage the TRANS Assys.

Caution:

During diagnosis, be sure NOT to remove the three screws marked A in the above photo. There is the case that a product does not work normally when removes these screws.

Do not lift the unit in this state.

2 3 4

VSX-418-K

2 3 4

+ 65 hidden pages

Pioneer VSX-418, VSX-418-K Service Manual

VSX-418-K

SAFETY INFORMATION

CONTENTS

1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

1.2 AMPLIFIER FAILURE DIAGNOSIS FLOW CHART

2. SPECIFICATIONS

2.1 SPECIFICATIONS

2.2 PANEL FACILITIES

3. BASIC ITEMS FOR SERVICE

3.1 CHECK POINTS AFTER SERVICING

3.2 PCB LOCATIONS

4. BLOCK BIAGRAM

4.1 OVERALL WIRING CONNECTION DIAGRAM

4.2 BLOCK DIAGRAM

4.3 DSP BLOCK DIAGRAM

5. DIAGNOSIS

5.1 DIAGNOSIS FLOWCHART

5.2 DETECTION CIRCUIT

5.3 AMPLIFIER SYSTEM PROTECTION OPERATION SPECIFICATION

6. SERVICE MODE

7. DISASSEMBLY