Pioneer N-70-AK Service Manual

N-70A-K

NETWORK AUDIO PLAYER

N-70A-K

N-70A-S
N-50A-K
N-50A-S

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

ORDER NO.

RRV4583

Model Type Power Requirement Remarks

N-70A-K SYXEV8 AC 220 V to 240 V

N-70A-S SYXEV8 AC 220 V to 240 V

N-50A-K SYXEV8 AC 220 V to 240 V

N-50A-S SYXEV8 AC 220 V to 240 V

PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, 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

2015

K-FZV JAN.

2015 Printed in Japan

1

2 3 4

SAFETY INFORMATION

A

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.

B

C

D

E

F

2

1

2 3 4

N-70A-K

5

6 7 8

CONTETS

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

1. SERVICE PRECAUTIONS.................................................................................................................................................... 4

1.1 NOTES ON SOLDERING ...............................................................................................................................................4

1.2 STYLING OF CABLES ................................................................................................................................................... 4

2. SPECIFICATIONS................................................................................................................................................................. 4

2.1 SPECIFICATIONS ..........................................................................................................................................................4

3. BASIC ITEMS FOR SERVICE ..............................................................................................................................................5

3.1 CHECK POINTS AFTER SERVICING ........................................................................................................................... 5

3.2 JIGS LIST ....................................................................................................................................................................... 5

3.3 PCB LOCATIONS ........................................................................................................................................................... 6

4. BLOCK DIAGRAM ................................................................................................................................................................ 8

4.1 OVERALL CONNECTION DIAGRAM............................................................................................................................. 8

4.2 BLOCK DIAGRAM........................................................................................................................................................ 10

5. DIAGNOSIS ........................................................................................................................................................................ 12

5.1 DIAGNOSIS FLOWCHART .......................................................................................................................................... 12

5.2 PROTECTION CIRCUIT ERROR DETECTION ........................................................................................................... 17

5.3 PROTECTION CIRCUIT OPERATION UNDER EXCESS POWER SUPPLY VOLTAGE.............................................. 18

6. SERVICE MODE................................................................................................................................................................. 19

6.1 SYSTEM INFORMATION DISPLAY MODE.................................................................................................................. 19

6.2 TEST MODE................................................................................................................................................................. 20

6.3 DEFAULT SETTING VALUE......................................................................................................................................... 21

7. DISASSEMBLY ................................................................................................................................................................... 22

8. EACH SETTING AND ADJUSTMENT ................................................................................................................................ 44

8.1 HOW TO UPDATING OF THE FIRMWARE.................................................................................................................. 44

8.2 HOW TO CONFORM EACH TERMINAL...................................................................................................................... 48

9. EXPLODED VIEWS AND PARTS LIST............................................................................................................................... 50

9.1 PACKING SECTION .....................................................................................................................................................50

9.2 EXTERIOR SECTION (N-70A-K, N-70A-S) ................................................................................................................. 52

9.3 MAIN SECTION (N-70A-K, N-70A-S)........................................................................................................................... 54

9.4 EXTERIOR SECTION (N-50A-K, N-50A-S) ................................................................................................................. 56

9.5 MAIN SECTION (N-50A-K, N-50A-S)........................................................................................................................... 58

10. SCHEMATIC DIAGRAM .................................................................................................................................................... 60

10.1 DMAIN ASSY (1/6)(N-70A-K/-S) ................................................................................................................................ 60

10.2 DMAIN ASSY (2/6)(N-70A-K/-S) ................................................................................................................................ 62

10.3 DMAIN ASSY (3/6)(N-70A-K/-S) ................................................................................................................................ 64

10.4 DMAIN ASSY (4/6)(N-70A-K/-S) ................................................................................................................................ 66

10.5 DMAIN ASSY (5/6)(N-70A-K/-S) ................................................................................................................................ 68

10.6 DMAIN ASSY (6/6)(N-70A-K/-S) ................................................................................................................................ 70

10.7 DMAIN ASSY (1/6)(N-50A-K/-S) ................................................................................................................................ 72

10.8 DMAIN ASSY (2/6)(N-50A-K/-S) ................................................................................................................................ 74

10.9 DMAIN ASSY (3/6)(N-50A-K/-S) ................................................................................................................................ 76

10.10 DMAIN ASSY (4/6)(N-50A-K/-S) .............................................................................................................................. 78

10.11 DMAIN ASSY (5/6)(N-50A-K/-S) .............................................................................................................................. 80

10.12 DMAIN ASSY (6/6)(N-50A-K/-S) .............................................................................................................................. 82

10.13 AUDIO ASSY (1/2)(N-70A-K/-S)............................................................................................................................... 84

10.14 AUDIO ASSY (2/2)(N-70A-K/-S)............................................................................................................................... 86

10.15 AUDIO ASSY (1/2)(N-50A-K/-S)............................................................................................................................... 88

10.16 AUDIO ASSY (2/2)(N-50A-K/-S)............................................................................................................................... 90

10.17 JACK ASSY and CNT_A ASSY................................................................................................................................92

10.18 HP_AMP ASSY (N-70A-K/-S)................................................................................................................................... 94

10.19 FRONT ASSY...............................................................................................................

0 USB_F ASSY............................................................................................................................................................98

0.2

1

10.21 HP (N-70A-K/-S), LED, POWER_SW, POWER_LED and IR ASSYS ....................................................................100

10.22 SMPS ASSY........................................................................................................................................................... 102

10.23 CNT_B, HP_CNT*, GUIDE_(FRONT1/2/3*, L/R*, HP*, CNT and TRANS) ASSYS (* : N-70A-K/-S)..................... 104

11. PCB CONNECTION DIAGRAM...................................................................................................................................... 106

11.1 DMAIN ASSY............................................................................................................................................................106

11.2 AUDIO ASSY ............................................................................................................................................................ 110

11.3 JACK, HP_AMP (N-70A-K/-S), FRONT, CNT_A and CNT_B ASSYS...................................................................... 114

11.4 USB_F, HP (N-70A-K/-S), LED, POWER_SW, POWER_LED and IR ASSYS ......................................................... 118

11.5 SMPS ASSY and HP_CNT ASSY (N-70A-K/-S) ...................................................................................................... 120

11.6 GUIDE_FRONT1/2/3, GUIDE_L/R and GUIDE_HP ASSYS (N-70A-K/-S)..............................................................122

11.7 GUIDE_CNT ASSY and GUIDE_TRANS ASSY ...................................................................................................... 124

12. PCB PARTS LIST ............................................................................................................................................................ 125

............................................ 96

A

B

C

D

E

F

5

6 7 8

N-70A-K

3

1

2 3 4

1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

A

• 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
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373
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

B

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 mm dia.
GYP1007 0.6 mm dia.
GYP1008 0.3 mm dia.

1.2 STYLING OF CABLES

o

C in general, although

o

C.

• As high-quality sound design is ensured for this product, it is affected by styling of cables.
Consequently, after the replacement of parts, refer to "Styling of cables" of SECTION 7 DISASSEMBLY

C

[3] and [8] and carry out the styling following the instruction.

2. SPECIFICATIONS

2.1 SPECIFICATIONS

Analog audio output

Output level

RCA jack (L/R) . . . . . . . . . . . . . . . . . . 2.2 V rms (1 kHz, 0 dB)

BALANCE jack (N-70A only) (L/R) . . 4.2 V rms (1 kHz, 0 dB)

Frequency response . . . . . . . . . . . . . . . 4 Hz to 90 kHz (–3 dB)

Signal-to-Noise Ratio

D

RCA jack (N-70A) (L/R) . . . . . . . . . . . . . . . . . . . . . . . .114 dB

BALANCE jack (N-70A) (L/R) . . . . . . . . . . . . . . . . . . .117 dB

RCA jack (N-50A) (L/R) . . . . . . . . . . . . . . . . . . . . . . . .112 dB

Dynamic range . . . . . . . . . . . . . . . . . . . . .117 dB (24 bit, 32 bit)

Total harmonic distortion

RCA jack (N-70A) (L/R) . . . . . . . . . . . . . . . . . . . . . . 0.0012 %

BALANCE jack (N-70A) (L/R) . . . . . . . . . . . . . . . . . 0.0008 %

THD + N

RCA jack (N-50A) (L/R) . . . . . . . . . . . . . . . . . . . . . . 0.0012 %

Channel separation . . . . . . . . . . . . . . . . . . . . . . . .110 dB (1 kHz)

Headphones output (N-70A only)

Output. . . . . . . . . . . . . . . . . . . . . . . 100 mW + 100 mW (32 Ω)

Compatible impedance. . . . . . . . . . . . . . . . . . . . 16 Ω to 600 Ω

Frequency response . . . . . . . . . . . . . . . 4 Hz to 80 kHz (–3 dB)

E

THD + N. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01 %

Digital audio output

Coaxial digital output . . . . . . . . . . . . . . . . . . . . . . . . . RCA jack

Optical digital output . . . . . . . . . . . . . . . . . . . . . . .Optical jack

Digital audio input

Coaxial digital input. . . . . . . . . . . . . . . . . . . . . . . . . . . RCA jack

Optical digital input. . . . . . . . . . . . . . . . . . . . . . . . .Optical jack

USB DAC terminal . . . . . . . . . . .USB2.0 High Speed (Type B)

iPod/iPhone terminal (Front/Rear)

. . . . . . . . . . . . . . . . . . . . .USB2.0 High Speed (Type A) 5 V, 1 A

Network

LAN terminal . . . . . . Ethernet jack (10 BASE-T/100 BASE-TX)

DC output terminal for WIRELESS LAN . . . . . . . .5 V, 600 mA

F

Centrally controlled section

Control output terminal. . . . . . . . . . . . . ø3.5 mini-jack (mono)

Generalites

System . . . . . . . . . . . . . . . . . . . . . . . . . . Network Audio Player

Power requirements . . . . . . . .AC 220 V to 240 V, 50 Hz/60 Hz

Power consumption

N-70A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45 W

N-50A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 W

Power consumption

In standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 W

In standby mode (Network standby on) . . . . . . . . . . . 2.0 W

Auto Power Down. . . . . .15 min (default), 30 min, 60 min, Off

Weight (without package)

N-70A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.5 kg

N-50A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 kg

Dimensions

N-70A. . . . . . . . . . 435 mm (W) x 121 mm (H) x 338 mm (D)

N-50A. . . . . . . . . . . 435 mm (W) x 99 mm (H) x 331 mm (D)

Operating temperature. . . . . . . . . . . . . . . . . . .+5 °C to +35 °C

Operating humidity. . . . . . . . . . . . . . . . . . . . . . . . . 5 % to 85 %

Note

•

The specifications are applicable when the power supply is

230 V.

•

Specifications and the design are subject to possible

modifications without notice, due to improvements.

•

Corporation and product names mentioned herein are

trademarks or registered trademarks of the respective

corporations.

•

This product is not designed for use in Japan.

•

This product includes FontAvenue® fonts licensed by NEC

Corporation. FontAvenue

Corporation.

•

iOS is a trademark on which Cisco holds the trademark right

in the US and certain other countries.

•

Android and Google Play are trademarks of Google Inc.

®

is a registered trademark of NEC

4

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N-70A-K

5

6 7 8

3. BASIC ITEMS FOR SERVICE

3.1 CHECK POINTS AFTER SERVICING

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

No. Procedures Check points

Confirm a firmware version at test mode. Should be the latest firmware version.

1

Confirm whether the customer complain has been solved.

2

If the indicated
replay a music file for test of the same format as target file.

Confirm replay of a music file for test with the same format as

3

corresponding file format at the front USB terminal. (Confirm
music files with all file formats should be replayed.)

Check the external package

4

A music file for test with corresponding file format should be used after downloading from the service dedicated Web Site onto
an USB memory, etc.

complain

is caused by a specific file format,

If not, update the version.

The customer complain must not be reappeared.
No abnormalities should exist in screen displayed contents,
audio and actions.

No abnormalities should exist in actions such as audio, screen
display, etc.

No scratches or dirt on its appearance after receiving it for
service.

See the table below for the items to be checked regarding audio.

Item to be checked regarding audio

Distortion

Noise

Volume too low

Volume too high

Volume fluctuating

Sound interrupted

A

B

C

3.2 JIGS LIST

Name Jig No. Remarks

Service Remote Control Unit GGF1381 Service Mode, Firmwar Update

19P board to board extension jig cable

23P board to board extension jig cable

GGD1887

GGD1888

SMPS ASSY CN2205 CN. FPC 1.25mm

AUDIO ASSY CN1501CN. FPC 1.25mm

D

E

F

5

6 7 8

N-70A-K

5

1

3.3 PCB LOCATIONS

2 3 4

A

N-70A-K/-S only:
HP ASSY

N-70A-K/-S only:

B

HP_AMP ASSY

C

G

D

N-70A-K/-S only:
HP_CNT ASSY

N-70A-K/-S only:
GUIDE_HP ASSY

N-70A-K/-S only:
GUIDE_R ASSY

O

U

T

N-70A-K/-S only:
GUIDE_FRONT1
ASSY

FRONT ASSY

E

GUIDE_CNT ASSY

P

USB_F ASSY

V

N-70A-K/-S only:
GUIDE_FRONT2
ASSY

Q

LED ASSY

H

F

N-70A-K/-S only:
GUIDE_L ASSY

S

N-70A-K/-S only:
GUIDE_FRONT3
ASSY

POWER_LED ASSY

J

IR ASSY

K

R

POWER_SW ASSY

I

W

GUIDE_TRANS
ASSY

D

B

AUDIO ASSY

E

C

JACK ASSY

A

DMAIN ASSY

M

CNT_A ASSY

N

CNT_B ASSY

L

SMPS ASSY

F

6

1

2 3 4

N-70A-K

5

6 7 8

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.

LIST OF ASSEMBLIES

N-70A-K, N-70A-S N-50A-K, N-50A-S

Mark Symbol & Discription N-70A-K N-70A-S

NSP 1...HP_AMP ASSY 7025HU1402022 7025HU1402032

2..HP_AMP ASSY 7028077151010 7028077151010

2..HP_CNT ASSY 7028077152010 7028077152010

NSP 1...FRONT ASSY 7025HU1402023 7025HU1402033

2..FRONT ASSY 7028077161030 7028077161030

2..JACK ASSY 7028077162010 7028077162010

2..CNT_A ASSY 7028077163010 7028077163010

2..CNT_B ASSY 7028077164010 7028077164010

NSP 1...SMPS ASSY 7025HU1402024 7025HU1402034

2..SMPS ASSY 7028077171030 7028077171030

>

2..LED ASSY 7028077172010 7028077172010

2..IR ASSY 7028077173010 7028077173010

2..POWER_LED ASSY 7028077174010 7028077174010

2..POWER_SW ASSY 7028077175010 7028077175010

2..GUIDE_CNT ASSY 7028077176010 7028077176010

2..GUIDE_TRANS ASSY 7028077177010 7028077177010

NSP 1...GUIDE ASSY 7025HU1402026 7025HU1402036

2..HP ASSY 7028077191010 7028077191010

2..GUIDE_FRONT1 ASSY 7028077192010 7028077192010

2..GUIDE_FRONT2 ASSY 7028077193010 7028077193010

2..GUIDE_FRONT3 ASSY 7028077194010 7028077194010

2..GUIDE_HP ASSY 7028077196010 7028077196010

2..GUIDE_L ASSY 7028077197010 7028077197010

2..GUIDE_R ASSY 7028077198010 7028077198010

Mark Symbol & Discription N-50A-K N-50A-S

NSP 1...FRONT ASSY 7025HU1403023 7025HU1403033

2..FRONT ASSY 7028077161040 7028077161040

2..JACK ASSY 7028077162010 7028077162010

2..CNT_A ASSY 7028077163010 7028077163010

2..CNT_B ASSY 7028077164010 7028077164010

NSP 1...SMPS ASSY 7025HU1403024 7025HU1403034

2..SMPS ASSY 7028077171040 7028077171040

>

2..LED ASSY 7028077172020 7028077172020

2..IR ASSY 7028077173010 7028077173010

2..POWER_LED ASSY 7028077174010 7028077174010

2..POWER_SW ASSY 7028077175020 7028077175020

2..GUIDE_CNT ASSY 7028077176010 7028077176010

2..GUIDE_TRANS ASSY 7028077177010 7028077177010

NSP 1...DMAIN ASSY 7025HU1403020 7025HU1403030

2..DMAIN ASSY 7028077131010 7028077131010

NSP 1...AUDIO ASSY 7025HU1403021 7025HU1403031

2..AUDIO ASSY 7028077141020 7028077141020

NSP 1...USB_F ASSY 7025HU1403025 7025HU1403035

2..USB_F ASSY 7028077181020 7028077181020

A

B

C

NSP 1...DMAIN ASSY 7025HU1402020 7025HU1402030

2..DMAIN ASSY 7028077131020 7028077131020

NSP 1...AUDIO ASSY 7025HU1402021 7025HU1402031

2..AUDIO ASSY 7028077141010 7028077141010

NSP 1...USB_F ASSY 7025HU1402025 7025HU1402035

2..USB_F ASSY 7028077181010 7028077181010

D

E

F

5

6 7 8

N-70A-K

7

1

GNDCH

8V

d

GNDCH

GNDCH

GNDCH

GND_Rear

5
6

GND_Rear

AC IN

GNDCH

GND_Rear

5
6

G

5
6

GNDCH

GNDD

W

D

S

S

R
B

B

B

C

M

G

2 3 4

4. BLOCK DIAGRAM

4.1 OVERALL CONNECTION DIAGRAM

A

GUIDE_FRONT1 ASSY

P

(N-70A-K/-S : 7028077192010)

GUIDE_FRONT2 ASSY

Q

(N-70A-K/-S : 7028077193010)

GUIDE_FRONT3 ASSY

R

(N-70A-K/-S : 7028077194010)

GUIDE_L ASSY

S

(N-70A-K/-S : 7028077197010)

GUIDE_R ASSY

T

(N-70A-K/-S : 7028077198010)

GUIDE_HP ASSY

U

(N-70A-K/-S : 7028077196010)

GUIDE_CNT ASSY

V

(7028077176010)

GUIDE_TRANS ASSY

W

(7028077177010)

B

Bridge

NC 12

CN2205

TAIKO:127301119K2

19P Bridge SOCKET

with Twist Pair

CP3002

1 GNDD
2 USB_F+
3 USB_F­4 GNDD

Cable(N-50A only)

Cable

with Shield

4P

ACRY 19

CN2102

2P

CN2103

2P

C

Cable

USB_F ASSY

F

(N-70A-K/-S : 7028077181010)

D

(N-50A-K/-S : 7028077181020)

POWER_SW ASSY

I

(N-70A-K/-S : 7028077175010)

SMPS ASSY

L

(N-70A-K/-S : 7028077171030)
(N-50A-K/-S : 7028077171040)

2P

CN2104

Trans

for Digital

CP3001

V+5R0_STB 18
V+5R0_STB 17
V+5R0_STB 16

GNDD 15
GNDD 14
GNDD 13

ACWP 11

GNDD 10
GNDD 9
GNDD 8
GNDD 7

GNDD 6
V+8V_D 5
V+8V_D 4
V+8V_D 3
V+8V_D 2
V+8V_D 1

1 POW_USB_F
2 XERR_USB_F
3 XDDCERR_USB_F
4 GNDUSB
5 GNDUSB
6 V+8V_USB
7 V+8V_USB

7P

Cable

CN1601

1 ACRY
2 V+5R0_STB
3 V+5R0_STB
4 V+5R0_STB
5 GNDD
6 GNDD
7 GNDD
8 NC
9 ACWP
10 GNDD
11 GNDD
12 GNDD

19P Bridge PLUG

TAIKO:246602119K4

CN902

CP2703

TAIKO:127301119K2

19P Bridge SOCKET

13 GNDD
14 GNDD
15 V+8R0_D
16 V+8R0_D
17 V+8R0_D
18 V+8R0_D
19 V+8R0_D

1 GNDD
2 USB_F+

4P

3 USB_F­4 GNDD

1 POW_USB_F
2 XERR_USB_F
3 XDDCERR_USB_F

7P

4 GNDUSB
5 GNDUSB
6 V+8_USB
7 V+8_USB

(N-50A-K/-S : 7028077175020)

POWER_KEY 1

LED0 2
LED1 3
LED2 4
LED3 5
LED4 6

GNDD 7

PWM_LED 8

GNDD 9

V+5R0_STB 10

GNDD 11

REM 12

V+3R3_STB 13

CP2205

13P

Cable

CP2805

1 POWER_KEY
2 POWER_LED
3 STBY_LED
4 PURE_LED
5 S.RETRIEVER_LED
6 UP_SAMPLING_LED

13P

7 GNDD
8 PWM_LED
9 GNDD
10 V+5R0_STB
11 GNDD
12 REM
13 V+3R3_STB

GNDD 2
GNDD 3

REM 1

GNDD 3

CN2301

3P

CP2601

3P

CP2501

3P

Cable

Cable

Cable

POWER KEY 1

POWER_LED ASSY

J

E

(7028077174010)

V+5R0_STB 1

POWER_LED 2

POWER_PWM 3

IR ASSY

K

(7028077173010)

V+3R3_STB 2

LED ASSY

H

(N-70A-K/-S : 7028077172010)
(N-50A-K/-S : 7028077172020)

CP2202

1 POWER KEY

3P

2 GNDD
3 GNDD

CN2201

1 V+5R0_STB

3P

2 POWER_LED
3 POWER_PWM

CN2203

1 REM
2 V+3R3_STB

3P

3 GNDD

1 GNDD 6 XRESET 11 SPDIF_COAX_IN 16 GNDD
2 GNDD 7 TOOL0 12 GNDD 17 GNDD
3 GNDD 8 GNDD 13 SPDIF_OPT_IN 18 SPDIF_OUT
4 V+3R3_ST 9 GNDD 14 V+3R3_DIR
5 V+3R3_ST 10 GNDD 15 V+3R3_DIR

CP2901

18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

18P Board to Board Jack(Receptacle)
IRISO 2.00mm pitch:IMSA-9111S-18L

Board to Board

CN2001

CP2002

18 Board to Board Plug(Header)

IRISO 2.00mm pitch:IMSA-9111B-18-PT1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

18P Board to Board Jack(Receptacle)
IRISO 2.00mm pitch:IMSA-9111S-18L

Board to Board

CN901

1 SPDIF_OUT 6 SPDIF_OPTIN 11 GNDD 16 GNDD
2 GNDD 7 GNDD 12 TOOL0_M 17 GNDD
3 GNDD 8 SPDIF_COAXIN 13 XRESET_M 18 GNDD
4 V+3R3 _DIR
5 V+3R3 _DIR 10 GNDD 15 V+3R3_ST

18P Board to Board Plug(Header)

IRISO 2.00mm pitch:IMSA-9111B-18-PT1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

9 GNDD 14 V+

( )

A

1/6 -A6/6

A

3R3_ST

DMAIN ASSY
(N-70A-K/-S : 7028077131020)
(N-50A-K/-S : 7028077131010)

1 GNDD 21 DB23/B7 41 DCLK 61 TOOL_D
2 V+5R0_ST 22 GNDD 42 HSYNC 62 RESET_
3 V+3R3_LCD 23 NC 43 VSYNC 63 GNDD
4 V+3R3_ST 24 NC 44 DE 64 GNDD
5 GNDD 25 DB10/G2 45 SUB_ON 65 GNDD
6 GNDD 26 DB11/G3 46 XSUB_RESET 66 NC
7 GNDD 27 DB12/G4 47 CCSK_MAIN 67 NC
8 BACKLIGHT_CTL 28 DB13/G5 48 SCDI_MAIN 68 GNDD
9 RESET 29 DB14/G6 49 SCDO_MAIN 69 GNDD
10 SPENA 30 DB15/G7 50 SUB_IREQ 70 POW_U
11 SPCLK 31 GNDD 51 MAIN_IREQ 71 XERR_U
12 SPDA 32 NC 52 GNDD 72 XDDCE
13 GNDD 33 NC 53 REMOCON 73 GNDUS
14 NC 34 DB2/R2 54 GNDD 74 V+8_US
15 NC 35 DB3/R3 55 RYAC 75 GNDD
16 DB18/B2 36 DB4/R4 56 ACWP 76 V+8_US
17 DB19/B3 37 DB5/R5 57 0DET_DAC
18 DB20/B4 38 DB6/R6 58 GNDD
19 DB21/B5 39 DB7/R7 59 GNDD
20 DB22/B6 40 GNDD 60 SUB_DL

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58

CN704

CN2701

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48

1 V+3R3_STB
2 V+5R0_STB
3 V+3R3_LCD
4 GNDD
5 GNDD

1 2 3 4 5

5P

Cable

CN2801 FPC2801

1 2 3 4 5
1 V+3R3_STB
2 V+5R0_STB
3 V+3R3_LCD
4 GNDD
5 GNDD

76P Board to Board Plug(Header) 2line TOP Type

COSMOS:C12002-4020-76G

76P Board to Board Jack(Receptacle) 2line TOP Type

COSMOS 2.00mm pitch:C2202-4045-36G, C2202-4045-40

CNT_B ASSY

N

(7028077164010)

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3

FPC2701CP2702

FFC with

Shield

5P

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3

1 GNDD 21 DB11/G3
2 GNDD 22 DB12/G4
3 BACKLIGHT_CTL 23 DB13/G5
4 RESET(XRST_LCD) 24 DB14/G6
5 SPENA(XCS_LCD) 25 DB15/G7
6 SPCLK(CLK_LCD) 26 GNDD
7 SPDA(DI_LCD) 27 DB0/R0
8 GNDD 28 DB1/R1
9 DB16/B0 29 DB2/R2
10 DB17/B1 30 DB3/R3
11 DB18/B2 31 DB4/R4
12 DB19/B3 32 DB5/R5
13 DB20/B4 33 DB6/R6
14 DB21/B5 34 DB7/R7
15 DB22/B6 35 GNDD
16 DB23/B7 36 DCLK
17 GNDD 37 HSYNC
18 DB8/G0 38 VSYNC
19 DB9/G1 39 DE(XEN_LCD)
20 DB10/G2

Board to Boar

39P

39P

F

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.

Cable

8

1

2 3 4

N-70A-K

5

N-70A only

22V

GND_Rear

g

R

GND_Rear

GNDCH

GND_Rear

GNDCH

5.5V

9

_

6 7 8

OAX_IN 16 GNDD

17 GNDD

PT_IN 18 SPDIF_OUT

IR
IR
9 8 7 6 5 4 3 2 1

eceptacle)

-9111S-18L

JACK ASSY

C

(7028077162010)

A

Board to Board

(Header)

111B-18-PT1

13 14 15 16 17 18

13 14 15 16 17 18

eceptacle)

-9111S-18L

Board to Board

(Header)

111B-18-PT1

13 14 15 16 17 18

11 GNDD 16 GNDD
12 TOOL0_M 17 GNDD
13 XRESET_M 18 GNDD
14 V+3R3_ST
15 V+3R3_ST

)

077131020)

077131010)

CLK 61 TOOL_DW

SYNC 62 RESET_DW
SYNC 63 GNDD

E 64 GNDD
UB_ON 65 GNDD
SUB_RESET 66 NC
CSK_MAIN 67 NC
CDI_MAIN 68 GNDD
CDO_MAIN 69 GNDD
UB_IREQ 70 POW_USB_F

AIN_IREQ 71 XERR_USB_F
NDD 72 XDDCERR_USB_F
EMOCON 73 GNDUSB
NDD 74 V+8_USB
YAC 75 GNDD
CWP 76 V+8_USB

DET_DAC

NDD
NDD
UB_DL

7 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75

8 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76

Plug(Header) 2line TOP Type
:C12002-4020-76G

Board to Board

ck(Receptacle) 2line TOP Type

2202-4045-36G, C2202-4045-40G

19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39

ASSY

077164010)

3 15 17 19 21 23 25 27 29 31 33 35 37 39
4 16 18 20 22 24 26 28 30 32 34 36 38

39P 20P

C with
hield

39P 20P

3 15 17 19 21 23 25 27 29 31 33 35 37 39

4 16 18 20 22 24 26 28 30 32 34 36 38

21 DB11/G3
22 DB12/G4

CTL 23 DB13/G5

T_LCD) 24 DB14/G6
_LCD) 25 DB15/G7

LCD) 26 GNDD
D) 27 DB0/R0

28 DB1/R1

29 DB2/R2
30 DB3/R3
31 DB4/R4
32 DB5/R5
33 DB6/R6
34 DB7/R7
35 GNDD
36 DCLK
37 HSYNC
38 VSYNC
39 DE(XEN_LCD)

CNT_A ASSY

M

(7028077163010)

Bridge

GNDD 8

GNDD 13

GNDD 17

GNDD 19

GNDD 21

GNDD 23

1 3 5 7 9 11 13 15 17 19
2 4 6 8 10 12 14 16 18 20

FFC with

Shield

1 3 5 7 9 11 13 15 17 19
2 4 6 8 10 12 14 16 18 20

CN701

TAIKO:127301123K2

23P Bridge SOCKET

FRONT ASSY
(N-70A-K/-S : 7028077161030)
(N-50A-K/-S : 7028077161040)

1 HP_DET
2 GNDD
3 GNDD

1 2 3

3P

CP2804

Cable

CP2402 CP2401

1 HP_DET
2 GNDD

3 GNDD

3P

1 2 3

LINEMUTE 1

XRYLINE(NC) 2

XHPRY 3

0DET_DAC 4

V+5R0_STB 5

XDAC_RESET 6

XPCM_DSD 7

SCL_DACR 9
SCL_DACL 10

SDA_DACR 11

SDA_DACL 12

VOL_CLK 14
VOL_SDA 15

VOL_CS 16

DACBCK 18

SDATA/DSDR 20

LRCK/DSDL 22

FPC2702

FPC2802

1 SUB_ON
2 XSUB_RST
3 CSCK_MAIN
4 SCDI_MAIN
5 SCDO_MAIN
6 SUB_IRQ
7 MAIN_IRQ
8 GNDD
9 REMOCON_TC(SROUT)
10 GNDD
11 RYAC
12 ACWP
13 0DET_DAC
14 GNDD
15 GNDD
16 SUB_DL
17 TOOL_DW
18 RESET_DW
19 GNDD
20 GNDD

HP ASSY

G

(N-70A-K/-S : 7028077191010)

23P Bridge PLUG

E

( )

B

23 LINEMUTE
22 XRYLINE
21 XHPRY
20 0DET_DAC
19 V+5R0_STB
18 XDAC_RESET
17 XPCM_DSD
16 GNDD
15 SCL_DACR
14 SCL_DACL
13 SDA_DACR
12 SDA_DACL
11 GNDD
10 VOL_CLK
9 VOL_SDA
8 VOL_CS
7 GNDD
6 DACBCK
5 GNDD
4 SDATA/DSDR
3 GNDD
2 LRCK/DSDL
1 GNDD

HP_R 1

HP_L 4

1/2 -B2/2

CN1810

1 VOL+
2 VOL­3 GNDD
4 V+3R3_STB

1 2 3 4

JUMPER

1 2 3 4

1 VOL+
2 VOL­3 GNDD
4 V+3R3_STB

5P

1 DAC+
2 NC
3 NC
4 DAC-

1 2 3 4

4P

1 AUDIO+
2 GND
3 AUDIO-

1 2

3

3P

Trans

for Analog

GNDCH 1

L-HOT 2
L-COLD 3
GNDCH 4

R-HOT 5
R-COLD 6
GNDCH 7

V+22UN 1

GNDAP_22UN 2

V-22UN 3

GNDAP_RY 4

GNDAP_7 5

V+15A 6

GNDAP_15 7

V-15A 8

GNDAP_15 9

GNDCH 1

XRYHP 2

GNDD 3

VOLCLK 4

VOLDT 5

VOLCS 6

GNDD 7

CN1809

Board to Board

(N-70A only)

CN1504

CN4501

7P

Board to Board

(N-70A only)

CN1503

CN4502

9P7P

CN1502

CN4506

Board to Board

(N-70A only)

CN4503

CN5001

CN5002

Board to Board

1 GNDCH
2 L-HOT
3 L-COLD
4 GNDCH

7P

5 R-HOT
6 R-COLD
7 GNDCH

1 V+22UN
2 GNDAP_22UN
3 V-22UN
4 GNDAP_RY
5 GNDAP_7

9P

6 V+15A
7 GNDAP_15
8 V-15A
9 GNDAP_15

1 GNDCH
2 XRYHP
3 GNDD

7P

4 VOLCLK
5 VOLDT
6 VOLCS
7 GNDD

1 GND_com
2 HP_L
3 GND_com
4 GND _L
5 GND_com
6 GND_R
7 HP_R

1 2 3 4 5 6 7

1 2 3 4 5 6 7

1 GND_com
2 HP_L
3 GND_com
4 GND _L
5 GND_com
6 GND_R
7 HP_R

1 HP_R
2 GNDR
3 GNDL
4 HP_L
5 GNDA

1 2 3 4 5

7P

7P

5P

B

AUDIO ASSY
(N-70A-K/-S : 7028077141010)
(N-50A-K/-S : 7028077141020)

CN1501

TAIKO:246602123K4

TAIKO:127301123K2

23P Bridge SOCKET

GND_R 2
GND_L 3

GNDA 5

N

HP_AMP ASSY

(N-70A-K/-S : 7028077151010)

D

Bridge

HP_CNT ASSY

(N-70A-K/-S : 7028077152010)

O

B

C

D

E

F

5

6 7 8

N-70A-K

9

1

S

USB

B JA501

2
1

3

1
5

2
1

3

1
5

(

4.2 BLOCK DIAGRAM

2 3 4

HP ASSY

A

B

C

G

HP OUT
JACK2401

HP VOL

ENC3101

VOL+,VOL-

KEY1,KEY2

HP_AMP ASSY

D

RY4502

HP_DET

HP AMP

IC4507

TPA6120A

FRONT ASSY

E

E-VOL

IC4501

NJW1195A

B

DMAIN ASSY

A

AUDIO ASSY

XRYHP

XLR OUT

JA1101/JA1203

CONTROL

RCA OUT

JA1102/JA1202

IC120
OPA2
NJM4

IC120
OPA2

IC110
OPA2
NJM4

IC110
OPA2

D

E

FRONT KEY

I

POWER_SW
ASSY

LCD

POWER_KEY

LED x 4

LED

J

POWER_LED
ASSY

MAIN u-com

IC2801

R5F101LEAFA

POWER_LED

H

LED ASSY

K

IR ASSY

AC_RY

CONTROL

RMC

R,G,B CONT

F

USB_F ASSY

SR

IC703
TC74VHC4052

(USB_Audio)

IC905

TS3USB221

(USB_Audio)

Sub u-con

R5F100MLAFA

Bridge-co

DM860AS1

FLASH IC304

S34ML01G100

IC702

CONTROL

IC302

A3V56S30GTP

SDRAM x 2 IC301,IC303

X301

24MHz

PHY IC

IC305

LAN8700C

CONTROL

CONTROL

IC507

(I2S/DSD)

TC74VHC157

U

F

Sensor

10

Power SW

LED

RMC2501

USB-A JACK3001

CONTROL OUT JA701

USB-A JA901

N-70A-K

1

2 3 4

LAN JA302

-

5

2

6 7 8

UT

/JA1202

IC1203
OPA2134(N70A)
NJM4585(N50A)

IC1202
OPA2134

IC1103
OPA2134(N70A)
NJM4585(N50A)

IC1102
OPA2134

(I2S/DSD)

IC508

TC74VHC157

IC1201
OPA2134(N70A)
NJM4585(N50A)

IC1101
OPA2134(N70A)
NJM4585(N50A)

Rch DAC

IC1401

ES9016(70A)

ES9011(50A)

Lch DAC

IC1301

ES9016(70A)

ES9011(50A)

(I2S/DSD)

SUB TRANS

MAIN TRANS

(I2S/DSD)

DIGITAL AUDIO

ANALOG AUDIO

CONTROL LINE

POWER SUPPLY

N-70A ONLY

A

B

C

C

CONTROL

CONTROL

IC507

(I2S/DSD)

D808K013DPTP400

TC74VHC157

IC506
TC74VHC157

USB Audio Decorder

IC502

CM6632A

DSP

IC102

X101

20MHz

SDRAM IC101

W9846G6JH

FLASH IC103

W25Q16DVSSIG

(I2S/DSD)

X503

45.158MHz

X502

49.152MHz

X501

12MHz

CONTROL

X901

24.576MHz

(I2S/DSD)

DIR/DIT

IC903

AK4115VQ-K

L

(SPDIF)

D

V+5_STB V+8D

AC IN AC RY

SMPS ASSY

E

DIGITAL OUT

JACK2903/2904

FLASH IC505

EN39LV010

USB-B JA501

5

(SPDIF)

C

DIGITAL IN

JACK2901/2902

JACK ASSY

N-70A-K

6 7 8

F

11

1

5. DIAGNOSIS

5.1 DIAGNOSIS FLOWCHART

Power supply is not turned ON

A

2 3 4

electrically conducted ?

B

voltage : Approx. 3.3V ?

C

Check the connection of
DMAIN ASSY – CNT_B ASSY

LCD is not lit

The unit does not

turn to the standby

mode when the power

cord is inserted

YES

Is F2101

YES

CN2205 16-18 pins :

Approx. 5V ?

YES

DMAIN ASSY

C1688 positive side

YES

NO

NO

Replace F2101

Check the SMPS
ASSY

NO

(periphery IC2101,
T2101, PC2101)

NO

Check the periphery
of IC1608

Is F2102 electrically

Check the power supply line
ACWP

This diagnostic flow is used when LEDs,etc are lit
but only the LCD is not lit following power is turned ON.
LEDs lit mean the STBY power supply is operating.
Main microcomputer is also operating.

NO

conducted ?

YES

CN2205 1-5 pins :

Approx. 12V ?

YES YES

Replace F2102

NO

Front key is not operable

This diagnostic flow is used when the main unit key
is not operable although the LCD is lit and the unit
is operable through the remote control following
power is turned ON.

Is RLY2101
operating ?

Check the
Transformer

NO

Check the signal line
ACRY

D

E

Communication is made

F

LCD is most likely failure although
other communication failure is also suspected
Replace LCD Module

Is there any

problem in connection

of DMAIN ASSY –

CNT_B ASSY ?

YES

FRONT ASSY

FPC2803 51 and 52 pins :

Approx. 19V?

YES

FRONT ASSY

FPC2803 53 and 54 pins :

Approx. 0V ?

YES

FRONT ASSY

FPC2801 6 pin :

Conducting ?

YES

NO

Connect again, or replace FFC

NO

Check the periphery of
FRONT ASSY IC2803
Check the periphery of Q2806

NO

Check the periphery of
FRONT ASSY Q2801

No communication is made to the LCD

NO

-Check the periphery of DMAIN ASSY IC302

-Replace DMAIN ASSY

Is each switch

smoothly operable ?

YES

FRONT ASSY

IC2801 49 and 50 pins :

Operating when operating

each switch ?

YES

Switches are operating and power is
turned ON, but IC2801 is not operating
Replace IC2801
Replace FRONT ASSY

NO

NO

Reassemble the Front Panel
and FRONT ASSY
Part failure of each switch

Part failure of each switch and
soldering failure
Soldering failure of R2883,
R2884

12

1

2 3 4

N-70A-K

5

6 7 8

ETHERNET is not recognized

This diagnostic flow is used when the network
device connected to the LAN terminal is not
recognized.

DMAIN ASSY IC302 is likely
not operating

Is USB (Front or Rear)

recognized ?

YES

Is the power supply of

DMAIN IC305 normal ?

YES

Is there any

short-circuit between L312

and L313 terminals ?

YES

Is there any soldering

failure in JA302 ?

YES

The signal from LAN terminal is conveyed to the IC
Check the periphery of IC305, and check soldering failure
of the resistor in the communication line. If no problem is
found, then IC305 failure

NO

Is the power supply of IC302
normal ?
Is X301 oscillating ?
Is XNETRST operating when the
power is turned ON ?
If there is no problem in these,
replace DMAIN ASSY

NO

Check the power supply line

NO

Remove the short-circuited
portion

NO

Solder again

USB (Front) does not operate

This diagnostic flow is used when USB (Front)
does not operate.

DMAIN ASSY IC302 is likely not
operating
Is the power supply of IC302

LAN (Network) is

recognized and

operates ?

YES

Does USB (Rear)

operate ?

YES

Is there any

short-circuit in

L906 ?

YES

Is there any

problem in the cable

connection to

USB_F ASSY ?

YES

USB_F ASSY

JACK3001 1 pin :

Voltage of 5V ?

NO

normal ?
Is X301 oscillating ?
Is XNETRST operating when the
power is turned ON ?
If there is no problem in these,
replace DMAIN ASSY

DMAIN ASSY IC905 is likely not

NO

operating
Check the periphery of IC905
(check connection of the power
supply and signal line)

NO

Remove the short-circuited
portion

NO

Reconnect the cable

NO

Check the power supply line
to JACK3001

A

B

C

YES

Check the signal lines
D+ and D- from USB_F ASSY

D

E

F

5

6 7 8

N-70A-K

13

1

2 3 4

USB (Rear) does not operate

This diagnostic flow is used when USB (Rear) does

A

B

C

not operate.

LAN (Network) is

recognized and

operates ?

YES

Does USB (Front)

operate ?

YES

Is there any

short-circuit in

L916 ?

YES

DMAIN ASSY
JA901 1 pin :

Voltage of 5V ?

YES

Check the signal line from JA901 to IC905

DMAIN ASSY IC302 is likely not
operating
Is the power supply of IC302

NO

normal ?
Is X301 oscillating ?
Is XNETRST operating when the
power is turned ON ?
If there is no problem in these,
replace DMAIN ASSY

DMAIN ASSY IC905 is likely not

NO

operating
Check the periphery of IC905
(check connection of the power
supply and signal line)

NO

Remove the short-circuited
portion

NO

Check the power supply line to
JACK901

USB (DAC) does not operate

This diagnostic flow is used when USB (DAC)
does not operate.
A Windows computer needs a driver to recognize
this unit.
Mac also requires a driver to play the DSD.
This diagnostic flow is used when only USB (DAC)
does not operate.

Is the power supply of DMAIN
ASSY IC502 normal?

The computer is

recognized ?

YES

The computer is recognized but sound is not output

Are DMAIN ASSY

X502 and X503

oscillating properly ?

YES

Is there any

signal in DMAIN ASSY

IC504 3-7 pins ?

YES

Check the signal line from IC504 to IC506

NO

Is X501 oscillating?
Check the connection of
IC502 – JA501

DMAIN ASSY IC905 is likely not

NO

operating
Check the periphery of IC905
(check connection of the power
supply and signal line)

NO

Check the signal line from
IC502 to IC504

Sound is not output from Headphones

Does any display

appear on the LCD when

turning UP/DOWN the

Headphone volume ?

D

sound signal in the

output side of Headphones

relay (RY4502) ?

sound signal in the
output of HP_AMP

E

HP_AMP ASSY

F

YES

Is there any

NO

Is there any

(IC4507) ?

NO

Volume
IC4501

CN4501

CN1504
(AUDIO SIGNAL OUTPUT : AUDIO ASSY)

HP_AMP

IC4507

Check the detection unit of the
Headphones jack insertion

NO

Check the connector (CP2402),
wire, part and pattern from
HP ASSY to FRONT ASSY

Check the connector, circuit and
pattern to HP_AMP ASSY

YES

CN4503 – HP_CNT ASSY –
Headphones jack

Check the relay drive circuit,

YES

±12V (IC4551, IC4552) power
supply circuit and drive signal
(XRYHP)

RELAY

RY4502

CN5001

CN4503

HP_CNT ASSY

CP2401

CP2402

Is there any

sound signal in the

output of Volume_IC

(IC4501) ?

Check the Headphones AMP_IC

YES

(IC4507) and peripheral circuits,
and ±15V power supply circuit

NO

Is there any

sound signal in the

input of Volume_IC

(IC4501) ?

Check the Volume_IC (IC4501)

YES

and peripheral circuits, and ±7V
power supply (IC4531, IC4532)
circuits

NO

Is there any

sound output in

Balance OUT ?

Check the circuit, pattern and
connector (CN1504) from the

YES

balance output branch resistors
(R1131, R1231) to the
Headphones volume

NO

See “Sound is not output from Balance OUT”

CN5002

JACK2401

HP ASSY

14

1

2 3 4

N-70A-K

5

6 7 8

Sound is not output from analog output

Sound is not output
from Balance OUT

Is there any

sound signal in LPF

circuits (IC1102, IC1202)

output ?

NO

Is there any

sound signal in I/V

circuits (IC1101, IC1201)

output ?

YES

Check the periphery of BAL
LPF circuits
(IC1102, IC1202)

MUTE circuit is ON

YES

Check the periphery of
MUTE drive circuits
(Q1571 – Q1575)

NO

Is there any

waveform in DAC output

when I/V input resistors

(R1105, R1006, R1205, R1206)

are removed ?

NO

Check whether:

-I2S signal is supplied to the DAC input
DAC power supplies

-(V+3R3D, V+1R2D, V+3R3A) are supplied

-Clock is supplied to the DAC from crystal
oscillator

Sound is not output
from Unbalance OUT

Is there any

sound signal in LPF

circuits (IC1103, IC1203)

output ?

NO

NO YES

YES

Is there any

sound signal in I/V

circuits (IC1101, IC1201)

output ?

Is ±15V power

supply voltage normal ?

YES

Check the periphery of
I/V circuits
(IC1101, IC1201)

YES

NO

MUTE circuit is ON
Check the periphery of
MUTE drive circuits
(Q1571 – Q1575)

Check the periphery of
UNBAL LPF circuits
(IC1103, IC1203)

Check the periphery of ±15V
power supply circuits
(IC1821, IC1822),
and blown fuses
(P1801, P1802)

A

B

C

Sound is not output from OPT input Sound is not output from COAX input

Sound is not output
from OPT input

Is there any

waveform in JACK2901

output when the source device

is connected with an

optical cable ?

YES

Is there any

waveform in

IC903 58 pin ?

YES

Check the peripheral circuits
of DIR (IC903) and V+3R3_DIR power supply

NO

JACK2901 OPT_IN
module failure

NO

supplied to the power

Check the patterns and parts
to JACK2901 output –
CP2901 – connector (CN901)

Is +3R3V

supply terminal of

JACK2901 ?

YES

Check the
V+3R3_DIR
power supply line

NO

Sound is not output
from COAX input

Is there any

waveform in IC903

60 pin when the source

device is connected to

COAX terminal ?

YES

Check the peripheral circuits
of DIR (IC903) and V+3R3_DIR power supply

Check the patterns and parts

NO

to JACK2902 – CP2901 –
connector (CN901)

D

E

F

5

6 7 8

N-70A-K

15

1

2 3 4

Sound is not output from COAX output

A

B

C

Sound is not output
from COAX output

Is DIGITAL_OUT

setting ON ?

YES

Is there any

pulse waveform in

JACK2904 ?

NO

Is there any

waveform in IC2902

4 pin ?

YES

Is there any

waveform in IC903

23 pin ?

NO

NO

False MENU setting

YES

Check the T2901 and peripheral
circuits of coupling capacitor

NO

Check the IC2902 and peripheral
circuits

YES

Check the patterns and parts to
IC2902 1 pin – CP2901 –
connector (CN901)

Check the peripheral circuits
of DIR (IC903) and V+3R3_DIR power supply

Sound is not output from OPT output

Sound is not output
from OPT output

D

E

Is DIGITAL_OUT

setting ON ?

YES

Is there any

pulse waveform in

JACK2903 ?

NO

Is there any

waveform in IC2902

10 pin ?

YES

NO

False MENU setting

YES

Check the IC2902 and peripheral

NO

circuits

Is +3R3V

supplied to the

power supply terminal

of JACK2903 ?

YES

JACK2903 OPT_OUT module
failure

NO

Check the V+3R3_DIR power
supply line

YES

Is there any

waveform in IC903

23 pin ?

NO

F

16

1

Check the patterns and parts to
IC2902 12 pin – CP2901 – connector (CN901)

Check the peripheral circuits
of DIR (IC903) and V+3R3_DIR power supply

N-70A-K

2 3 4

5

6 7 8

5.2 PROTECTION CIRCUIT ERROR DETECTION

te in the event of an error.

Since POW_USB_W remains in High

to turn ON the power by ControlApp,

the detection continues even after the

transition to the high-speed startup

Standby.

When the detection is confirmed

during the high-speed startup

Standby, transit POW_USB_W to

Low. After that, when the power is

turned ON, POW_USB_W is set to

High and after a lapse of 10 ms, the

Remark

Return

processing

Power OFF 

Power ON

effects a return.

detection starts again.

Power OFF 

Power ON

effects a return.

This protection operation is intended

for protection of the external

connection equipment against a

failure within the body.

The device is put in the unreturnable

sta

Not returnable

Only releasing

method

described below

A

B

Processing

after detection

Number of NGs Detection method

LED

display

GUI display

Item

After detection, execute

AC_OFF processing,

and the power is turned

OFF.

The presence or absence of power supply is

detected. At the same time, occurrence of

AC instantaneous interruption is also

detected. AC_DET (Sub/IC1001-81 pin)

"H" detection

- - -

AC

Detection

(IC1702-64 pin) to Low.

displayed when the detection is

confirmed during a high-speed

startup Standby), and the keys

other than the Standby/On key

1) Transit POW_USB_W

2) Error is displayed at GUI (not

Overcurrent in the power supply to WiFi

Module (Wireless LAN Converter) is

detected.

The assumption is a failure in Module.

WiFi

become invalid.

XERR_USB_W (Sub/IC702-12 pin)

“L” detection

(0 to 255

displayed)

USB W ERR

-

Error

W-LAN

Over

Module

Current

Detect ion

1) Transit POW_USB_F to Low.

Overcurrent in the power supply to Front

USB(iPod/iPhone/iPad/USB memory) is

detected.

USB

Over

Over

Front USB

Immediately shut down.

The assumption is a failure in Module.

XERR_USB_F (Main/IC1504-D2 pin)

“L” detection

Overcurrent in the power supply to Front

(0 to 255

displayed)

-

Current

Current

Detection

B memory) is

USB(iPod/iPhone/iPad/US

detected.

The assumption is a failure in DCDC

Converter.

XDDCERR_USB_F (Sub/IC1001-40 pin)

-

LED

Standby

-

Over

Voltage

Detection

Front USB

“L” detection

[Releasing method for the power ON disabled state]

Input "ESC(A85F)"  "TEST(A85E)" on the service remote controller (GGF1381).

C

D

E

F

5

6 7 8

N-70A-K

17

1

2 3 4

5.3 PROTECTION CIRCUIT OPERATION UNDER EXCESS POWER SUPPLY VOLTAGE

A

[Why a protection circuit is mounted]

The unit is designed to turn OFF the primary AC relay of the transformer when overvoltage is detected for the
purpose of protecting those parts connected to the power supply output in case of I/O short-circuit in the
power supply regulator and DC/DC convertor.

[Power supplies to be protected]

The following power supply circuits:

V+3R3_DIR
V+2R3_DSP
V+3R3_DSP
V+3R3_USB

B

[Description of circuit operation]

In case the output voltage of target power supplies above exceeds approx. 7V, the circuit forcibly turns
the ACWP port to Low.
The main microcomputer identifies the loss of AC power and shuts down the unit. => Standby OFF

[Failure part diagnosis]

The faulty circuit in the target power supplies can be identified if AC_ON is ready in case the chip jumper (resistor) or
inductor of the power supply output line is removed.

V+3R3_DIR R1693
V+2R3_DSP L1610

C

V+3R3_DSP R1695
V+3R3_USB R1637

Check V+

3R3_USB : Input side jumper (R1637) is removed.

V+3R3_DSP

V+3R3_DIR

D

V+3R3_USB

E

V+2R3_DSP

F

18

1

2 3 4

N-70A-K

5

6 7 8

6. SERVICE MODE

N-70A/N-50A provide two types of service modes.

System Information Display Mode

Test Mode

6.1 SYSTEM INFORMATION DISPLAY MODE

System Information Display Mode provides a dedicated menu.
Following items are executed from the menu list.

 Version confirmation of MainCPU / SubCPU / BcoCPU / DSP
 Confirmation of model information (N-70A or N-50A)
 Confirmation of region information (Japan or Europe)
 Confirmation of network information

How to Enter System Information Display Mode.

System information menu is activated by inputting "ESC(A85F)" -> "DISP(A843)" on the Service Remote Control Unit
GGF1381 while the power of the Main Unit is ON.

* When inputting other Remote Control Unit input between "ESC" and "DISP", the menu will not be activated.

Also, the input state of the "ESC" key is erased when the power is turned OFF.

How to Exit System Information Display Mode.

Exit the menu by function switching, power is turned OFF, input of the [RETURN] key on the Service Remote
Control Unit, or the [] button on the Main Unit.

A

B

Menu

Operation of the menu is performed by cursor keys on the Remote Control Unit of the product.
In addition, the menu operation can be done with buttons on the Main Unit when the Remote Control Unit is not included.
In that case, they work as follows;

 : Exit System Information Display Menu

In the System Information Display Mode, following screens are displayed.

[Samples of display screens] (When the language setting is English.)

Page 1

Software Version of Bco(DM860)

Software Version of SubCPU

Software Version of DSP (Non-supported for update, constant display of 100 )

Software Version of MAIN CPU

Page 2

C

D

E

Model information : N-70A/N-50A

Region information : JXEV/SYXEV8

MAC address of the product

IP address, "---" is displayed when it is not connected

F

5

6 7 8

N-70A-K

19

1

2 3 4

6.2 TEST MODE

In the Test Mode, the LED lighting and LCD display (dead pixels) on the Main Unit are confirmed.
Also the Factory Default Settings can be implemented.

A

How to Enter System Information Display Mode

Press "ESC(A85F)" -> "FRM/TIM(A841)" on the Service Remote Control Unit GGF1381 while the power of the
Main Unit is ON.

* When inputting other Remote Control Unit input between "ESC" and "FRM/TIM", the mode will not be activated.

Also, the input state of the "ESC" key is erased when the power is turned OFF.

How to Exit System Information Display Mode

Exit the Test Mode by function switching or power is turned OFF.

How to operate

Test Mode displays the following screen. In this mode, the LEDs does light up (STANDBY/ON, STANDBY, DIRECT,
Hi-Bit32, Up Sampling) on the Main Unit. The LEDs stay lighting during the Test Mode.

B

* The brightness of the LEDs other than STANDBY LED (RED) varies depending on the DIMMER settings.

Confirmation of LCD and LED displays

C

On the Test Mode screen, move to the previous screen or the next screen using the Remote Control Unit or Main Unit
by keys.

[Transition of display screens]

D

Factory Default Settings

Factory Default Settings are implemented on any screen in the Test Mode using the Remote Control Unit or Main Unit
by  key.
The screen is returned to the Test Mode screen while conducting the Factory Default Settings.
Then, after the completion of the processes (about 10 seconds later), the power will be automatically turned OFF.

* Do not turn the power OFF during processing the Factory Default Settings.

E

* When the mode is not the Test Mode, the Factory Default Settings can be conducted from [Initial Setup] - [Factory Reset].

With either method, the Factory Default Settings are proceeded in the same way.

[Display screens]

F

20

About 10
seconds

POWER OFF

N-70A-K

1

2 3 4

5

6 7 8

6.3 DEFAULT SETTING VALUE

A

All Functions

Variable Range

iPod/USB Front

N-70A N-50A

MIN (0)

Available Not AvailableAvailable Not Available Available / Not Available

SYXEV8 JXEV SYXEV8 JXEV

*6:Japanese/English

0.0.0.0 - 255.255.255.255

0.0.0.0 - 255.255.255.255

*5:English/German/French/Italian/Spanish/Dutch/Russian

N-50A

ON

ON

ON

ON

(null)

(null)

(null)

(null)

(null)

(null)

(null)

Don't Use

7

7

7

7

7

7

7

7

7

7

Mode1

SHARP

ON

OFF

LEVEL3

OFF

OFF

Eng.-Europe7L Eng.-Europe 7L / Japanese-Eng. 2L

0 Station

Japanese-Eng. 2L Japanese-Eng. 2L

N-70A

2-HOT/3-COLD

Eng.-Europe7L

B

C

D

Items

Headphone VOLUME MIN(0) - MAX(50)

Basic Functions

NETWORK STANDBY ON / OFF

DIMMER *1 LEVEL3 / LEVEL2 / LEVEL1

SOURCE SELECT

Availability of SPOTIFY Function

Auto Power Down( )APD 15min OFF 15min OFF OFF / 15min / 30min / 60min

5

A.S.R ON / OFF

A.L.C ON / OFF

DIRECT ON / OFF

SOUND Systems

Hi-Bit32 *2 ON / OFF

UP SAMPLING *3 ON / OFF

BALANCE Polarity Setting 2-HOT/3-COLD, 2-COLD/3-HOT

Setting Systems

*4 iPod/USB Rear 7 -1

DIGITAL OUT ON / OFF

Lock Range Adjust iPod/USB Front 7-1

DMR 7-1

AirPlay 7-1

Digital In 2 7 -1

Digital In 1 7-1

Spotify 7 7 - 1

Favorites 7 -1

Internet Radio 7-1

Music Server 7-1

USB DAC In 7 -1

DHCP ON / OFF

Digital Filter DSD Mode1 / Mode2 / Mode3

Digital Filter PCM SLOW / SHARP / SHORT

IP Address 0.0.0.0 - 255.255.255.255

Sub Netmask

Gateway

DNS1 0.0.0.0 - 255.255.255.255

NETWORK Systems

Display Systems

DNS2 0.0.0.0 - 255.255.255.255

Proxy Setup Don't Use / Use

Proxy Port 128 Characters

Proxy Server 128 Characters

Friendly Name

Favorites List Max 64 Stations

FONT SET

Language English *5Japanese *6 English *5Japanese *6

N-70A-K

6 7 8

No Functions

* 1 Setting menu for DIMMER is not available and it is set by using the Remote Control Unit only. LEVEL 3 is the brightest mode.

* 2 Hi-Bit32 LED does not light up because DIRECT ON takes priority. The ON setting of Hi-Bit32 LED will become available after DIRECT is turned OFF.

* 3 Up Sampling LED does not light up because DIRECT ON takes priority. The ON setting of Up Sampling will become available after DIRECT is turned OFF.

* 4 Lock Range Adjust can be set by each function.

* 5 English is selected from the Eng.-Europe 7L font set

* 6 Japanese is selected from the Japanese-Eng. 2L font set

21

E

F

1

D

D

DDD

B

A

A

A

A

BEC

AAA

A

A

A

A

AAA

A

A

A

A

A

A

A

BBB

B

C

C

E

E

2 3 4

7. DISASSEMBLY

(1) Even if the unit shown in the photos and illustrations in this manual may differ from your product, the

Note :

A

[1] Screws for Rear Panel (N-70A-K, N-70A-S)

procedures described here are common.
(2) As for the assembling, please perform assembling following to the opposite procedures of How to Disassemble.
(3) For performing the diagnosis shown below, the following jigs for service is required.

• 19P board to board extension jig cable (GGD1887) • 23P board to board extension jig cable (GGD1888)

B020030063B10SV B020030083B10-IL B020030083P10SV

B

x 20 (L=6mm) x 4 (L=8mm) x 4 (L=8mm)

C

B020030083F10-IL

x 2

[2] Disassembly (N-70A-K, N-70A-S)

[2-1] Exterior

[2-1-1] Cabinet ASSY

(1) Remove the six screws, using the hexagon

wrench (2.5mm).

N-70A-K : 1500210736000S

(

N-70A-S : 1500210746000S

D

(2) Remove the three screws.

(B020030063B10SV)

(3) Slide the Cabinet ASSY to backward and then

take out it upward.

)

1

B020030103B11-IL

x 2 (L=10mm)

Cabinet ASSY

1

(NSP)

Not necessary if it is not

(

attached from the start

1

1

x 1

)

3

1

2

1

2

2

Note on assembling:

If only Cabinet is replaced, it is required to
attach new Cushion, CR Rubber 4 x 40 x 40,
Himelon 7 x 80 (2 sheets) and Himelon 7 x 35
(2 sheets), so replace the whole Cabinet ASSY.
(Refer to the “[4-1] Cabinet”)

E

[2-1-2] Side Panel R, Side Panel L

(1) Remove the four screws. (B020030061B10SV)
(2) Remove the four screws, using the hexagon

wrench (2.5mm).

N-70A-K : 1500210736000S

(

N-70A-S : 1500210746000S
(3) Remove the Side Panel R and Side Panel L.

Note on assembling:

When replacing the Side Panel R or Side Panel L,

F

attach the new Neoprene Sponge 2 × 35 × 15.
(Refer to the “[4-2] Side Panel L, Side Panel R”)

22

1

)

3

1

2

Side Panel R

3

1

2

N-70A-K

2 3 4

Side Panel L

• Right side

1

2

• Left side

1

2

5

6 7 8

[2-2] Diagnosis to the Side-B of

DMAIN ASSY

Remove the exterioor.
(Refer to the “[2-1] Exterior”)

----------------------------------------------------------------­(1) Release the cables from the three PCB

binders.
(2) Cut the two binders.
(3) Remove the two screws.

(B020030061B10SV)

Note on assembling:

∗1: Don’t forget the attach of Lug Wire.

(4) Disconnect the connector.

Note: When disconnect the connector, lift up the

CNT_B ASSY horizontally without tilt.

Note on assembling:
Refer to the (8) to (11) of “[3] Styling of

cables (N-70A-K, N-70A-S)” for the styling

of each cables.

5P Connector ASSY

Primary Side Cable

of Sub Trans

CNT_B ASSY

4P Shield ASSY

Front

3P Connector ASSY

1

Lug Wire

A

3

∗1

3

2

CN2701

GUIDE_CNT ASSY

4

B

DMAIN ASSY

5

6

C

(5) Release the 3P Connector ASSY from the

PCB binder.
(6) Disconnect the connector.
(7) Remove the screw. (B020030061B10SV)

Note on assembling:
Refer to the (1) of “[3] Styling of cables

(N-70A-K, N-70A-S)” for the styling of cable.

(8) Release the Secondary Side 3P Cable of

Sub Trans from the PCB binder.

Note on assembling:
Refer to the (5) of “[3] Styling of cables

(N-70A-K, N-70A-S)” for the styling of cable.

(9) Disconnect the connector.
(10) Remove the two rivets.
(11) Disconnect the connector and then remove

the HP_CNT ASSY.
(12) Remove the two screws.

(B020030061B10SV)

POWER_SW ASSY

Lug Wire

Shield Plate USB

7

HP_AMP ASSY

CN4503

HP_CNT ASSY

10

9

Secondary Side 3P Cable of Sub Trans

8

11

CN5002

HP ASSY

CN2301

D

10

12

E

12

F

5

6 7 8

N-70A-K

23

1

2 3 4

(13) Remove the six screws.

N-70A-K : B020030083B10-IL

(

N-70A-S : B020030081B10-IL

A

B

C

(14) Remove the four screws.

(B020030081B10-IL)

(15) Unhook the two hooks, pull out the Front

Section toward front direction and then
provide the gap between Front Frame.
Complete removal of Front Section is not
necessary.

)

:

13

x 6

14

15

Front Section

14

• Bottom side

Front Panel

Front Frame

14

14

15

(16) Disconnect the connector.
(17) PuII out the 7P Connector ASSY from the

hole of Front Frame.

D

(18) Pass the 7P Connector ASSY through the

cutout of Front Panel.

(19) Fix the two hooks which were removed at

E

Step (15) and mount the Front Section.
Attach of screws is not necessary.

(20) Connect the connector.

GUIDE_CNT ASSY

Front

Front Section

19

Front Frame

Cutout of Front Panel

18

7P Connector ASSY

Hole of Front Frame

17

CNT_B ASSY

7P Connector ASSY

POWER_SW ASSY

16

CP2703

20

CN2301

F

24

1

2 3 4

N-70A-K

5

6 7 8

(21) Disconnect the two connectors.
(22) Remove the four screws. (1500001206010-IL)
(23)Remove the two screws. (1500001206020-IL)

Note on assembling:

When attach the DMAIN ASSY, be sure to

secure the screws at Rear Panel side first.

(24) Remove the five screws.

(B020030063B10SV)

Note on assembling:

∗2: Attach the Tooth Washer (NSP)

to the screw of red frame part.

(Not necessary if it is not attached from the start)

(25)Remove the four screws. (B020030083B10-IL)

(26)Remove the DMAIN ASSY (with other parts).

Note:

∗3: Tilt the two CN. FPC 1.25mms toward center

side and pull out them from the holes of

Center Frame R and Center Frame L.

Center Frame R

Front

∗3

CN. FPC 1.25mm

21

Front

CN1501

AUDIO ASSY

:

24

22

22

CNT_A ASSY

x 5

:

25

23

26

DMAIN ASSY

23

JACK ASSY

x 4

22

SMPS ASSY

22

21

CN2205

CN. FPC 1.25mm

• Rear side

∗2

A

B

C

CN. FPC 1.25mm

DMAIN ASSY

(27)Remove the CNT_A ASSY and JACK ASSY

from the DMAIN ASSY.

Note on assembling:

When replacing the DMAIN ASSY, peel off the

Acetate Tape 25 x 40 from the original DMAIN

ASSY and attach it to the new DMAIN ASSY.

If the tape cannot be recycled, attach the new

Acetate Tape 25 x 40.

(Refer to the “[4-3] DMAIN ASSY”)

(28)Reverse the CNT_B ASSY and then arrange

it as shown in the photo.
(29)Connect the connector.
(30)Insert the Insulation Sheet.
(31)Set up the same height pedestal as Main

Body as shown in the photo.
(32)Arrange the DMAIN ASSY as shown in the

photo and then connect the connector.
(33)Connect the 23P board to board extension

jig cable. (GGD1888)
(AUDIO CN1501 <-> CN. FPC 1.25mm)
(34)Connect the 19P board to board extension

jig cable. (GGD1887)
(SMPS CN2205 <-> CN. FPC 1.25mm)

26

19P board to board extension

jig cable (GGD1887)

CNT_A ASSY

DMAIN ASSY

SMPS ASSY

CN2205

Insulation Sheet

7P Connector ASSY

30

34

27

CP2002

CP2703

29

DMAIN ASSY (Side-B)

CN. FPC 1.25mm

JACK ASSY

CN1501

28

CN704

32

23P board to board extension

jig cable (GGD1888)

33

AUDIO ASSY

CNT_B ASSY
(Side-B)

CN. FPC 1.25mm

Same height pedestal

as Main Body

31

D

E

F

5

6 7 8

N-70A-K

25

1

2 3 4

[2-3] Diagnosis to the Side-A of

FRONT ASSY

Remove the exterioor.

A

(Refer to the “[2-1] Exterior”)

----------------------------------------------------------------­(1) Cut the two binders.
(2) Disconnect the connector.
(3) Release the cables from the three PCB

binders.

(4) Remove the two screws.

(B020030061B10SV)

Note on assembling:

∗4: Don’t forget the attach of Lug Wire.

B

(5) Disconnect the connector.

Note: When disconnect the connector, lift up the

CNT_B ASSY horizontally without tilt.

Note on assembling:
Refer to the (8) to (11) of “[3] Styling of

cables (N-70A-K, N-70A-S)” for the styling

of each cables.

C

(6) Disconnect the four connectors and then

remove the CNT_B ASSY (with other parts).

5P Connector ASSY

Primary Side Cable

of Sub Trans

CNT_B ASSY

4P Shield ASSY

Front

Cable, Flat Card Shield 1.0mm

5P Connector ASSY

CP2702

3

Lug Wire

4

∗4

4

1

CN2701

7P Connector ASSY

GUIDE_CNT ASSY

5

2

CN902

6

6

FPC2701

GUIDE_CNT ASSY

DMAIN ASSY

6

FPC2702

7P Connector ASSY

6

CP2703

D

(7) Cut the binder.
(8) Release the 3P Connector ASSY from the

PCB binder.
(9) Disconnect the connector.
(10) Remove the screw. (B020030061B10SV)

Note on assembling:

E

Refer to the (1) and (3) of “[3] Styling of

cables (N-70A-K, N-70A-S)” for the styling

of each cables.

F

Front

3P Connector ASSY

POWER_SW ASSY

Lug Wire

10

CNT_B ASSY

8 9

CN2301

7

26

1

2 3 4

N-70A-K

5

(11) Release the Secondary Side 3P Cable of

Sub Trans from the PCB binder.

6 7 8

HP_AMP ASSY

HP_CNT ASSY

Note on assembling:
Refer to the (5) of “[3] Styling of cables

(N-70A-K, N-70A-S)” for the styling of cable.

(12) Disconnect the connector.
(13) Remove the two rivets.
(14) Disconnect the connector and then remove

the HP_CNT ASSY.

(15) Remove the two screws.

(B020030061B10SV)

(16) Remove the six screws.

N-70A-K : B020030083B10-IL

(

N-70A-S : B020030081B10-IL

(17) Remove the four screws.

(B020030081B10-IL)

(18) Unhook the two hooks, pull out the Front

Section toward front direction.

Note:

∗5: Remove the Power Knob (with other parts)

from the POWER_SW ASSY.

)

CN4503

12

Secondary Side 3P Cable of Sub Trans

:

16

x 6

13

11

Front Panel

17

17

14

CN5002

HP ASSY

A

13

15

B

15

• Bottom side

C

Notes on assembling:

∗5: Be sure to make the blue section of SW2302

inserting into the projection of Power Knob.
Confirm the /I STANDBY/ON Button
operation before fixing the screws which
have been removed at Step (17).

POWER_SW ASSY

∗5

Projection

Power Knob

(19) PuII out the eight cables from the holes of

Front Frame and then remove the Front
Section.

SW2302

18

Front Section

17

Front Frame

19

Front Section

17

19

D

18

E

F

5

6 7 8

N-70A-K

27

1

2 3 4

(20) Disconnect the two connectors.
(21) Remove the four screws.

A

B

C

(1500001206010-IL)
(22)Remove the two screws.

(1500001206020-IL)

Note on assembling:

When attach the DMAIN ASSY, be sure to

secure the screws at Rear Panel side first.

(23) Remove the five screws.

(B020030063B10SV)

Note on assembling:

∗6: Attach the Tooth Washer (NSP)

to the screw of red frame part.

(Not necessary if it is not attached from the start)

(24)Remove the four screws.

(B020030083B10-IL)

(25)Remove the DMAIN ASSY (with other parts).

Note:

∗7: Tilt the two CN. FPC 1.25mms toward center

side and pull out them from the holes of

Center Frame R and Center Frame L.

Center Frame R

CN. FPC 1.25mm

CN1501

Front

AUDIO ASSY

:

21

20

21

CNT_A ASSY

23 24

x 5

:

22

25

DMAIN ASSY

22

JACK ASSY

x 4

21

SMPS ASSY

21

20

CN2205

CN. FPC 1.25mm

• Rear side

∗6

Front

CN. FPC 1.25mm

D

Note on assembling:

When replacing the DMAIN ASSY, peel off

the Acetate Tape 25 x 40 from the original

DMAIN ASSY and attach it to the new

DMAIN ASSY.

If the tape cannot be recycled, attach the

new Acetate Tape 25 x 40.

(Refer to the “[4-3] DMAIN ASSY”)

(26)Remove the three screws

E

(B020030061B10SV) and then remove the

POWER_SW ASSY (with other parts).

(27)Remove the screw of Front Panel.

(B020030081B10-IL)
(28)Unhook the two hooks and then remove the

Front Panel.

∗7

25

DMAIN ASSY

Front

• Left side

Front Panel

26

POWER_SW ASSY

28

Power PCB Bracket

POWER_SW ASSY

Power PCB Bracket B

27

28

F

28

1

2 3 4

N-70A-K

5

(29)Remove the HP Vol. Knob ASSY.

(30)Remove the nut, using the socket wrench

(11mm or 12mm).

6 7 8

HP Vol. Knob ASSY

30

nut

A

Note on assembling:

Check the Knob Tape is attach to the

position shown in the figure.

Knob Tape

(Front view) (Side view)

(31)Remove the two screws.

(B020030081B10-IL)

(32)Remove the GUIDE_HP ASSY and HP ASSY.

(Don’t disconnect the connector of HP ASSY)

(33)Remove the eight screws.

(B020030081B10-IL)

(34)Connect the five connectors.

Axis of the ENC3101

29

:

31

x 2

32

5P Connector ASSY

CP2702

FPC2701

FPC2702

:

33

HP ASSY

34

x 8

FRONT ASSY

GUIDE_HP ASSY

Cable, Flat Card Shield 1.0mm

3P Connector ASSY

B

C

POWER_SW ASSY

34

(35)Set up the DMAIN ASSY (with other parts)

on the Main Body as shown in the photo.

(36)Connect the 23P board to board extension

jig cable. (GGD1888)

(AUDIO CN1501 <-> CN. FPC 1.25mm)
(37)Connect the 19P board to board extension

jig cable. (GGD1887)

(SMPS CP2205 <-> CN. FPC 1.25mm)

CNT_B ASSY

19P board to board extension

jig cable (GGD1887)

DMAIN ASSY

CP2703

CN. FPC 1.25mm

35

Front

34

7P Connector ASSY

37

CN2205

CN2301

SMPS ASSY

CN1501

AUDIO ASSY

23P board to board extension

36

jig cable (GGD1888)

D

E

F

5

6 7 8

N-70A-K

29

1

2 3 4

(38)Insert the Insulation Sheets and then

Arrange the units as shown in the photo.

A

B

C

Raise the top side of FRONT ASSY.
(39)Connect the two connectors.

Notes:

∗8: Don’t damage the Display Window located

at the front surface of Panel Frame.
∗9: For the diagnosis of Side-A of FRONT ASSY,

carry out the diagnosis without connecting

the HP_CNT ASSY and HP ASSY.

HP_CNT ASSY

Note on assembling:

When replacing the FRONT ASSY, peel off

the Acetate Tape 20 x 40 from the original

FRONT ASSY and attach it to the new

FRONT ASSY.

If the tape cannot be recycled, attach the

new Acetate Tape 20 x 40.

(Refer to the “[4-5] FRONT ASSY”)

∗9

HP ASSY

Front

4P Shield ASSY

CN902

DMAIN ASSY

38

Insulation Sheet

39

CN2701

Side Frame

HP_AMP ASSY

38

39

CNT_B ASSY

∗8

FRONT ASSY

Panel Frame

Tweezers

[2-4] HP_AMP ASSY, AUDIO ASSY

Remove the Cabinet ASSY and Side Panel R.
(Refer to the “[2-1] Exterior”)

----------------------------------------------------------------­(1) Disconnect the connector.
(2) Remove the two Rivets.

D

Note:

∗10: The Rivets is able to be removed by

inserting the shank part of Tweezers, etc.,

from a gap without removing the Side

Frame.

(3) Disconnect the three connectors and then

remove the HP_AMP ASSY.

E

(4) Release the cables from the two PCB

binders.
(5) Disconnect the two connectors.

Note on assembling:
Refer to the (5) and (6) of “[3] Styling of

cables (N-70A-K, N-70A-S)” for the styling

of each cables.

Front

Front

2

CN4501

4

CN1809

AUDIO ASSY

∗10

Rivet

3

HP_AMP ASSY

CN4502

AUDIO ASSY

Secondary Side 3P Cable of Sub Trans

Sub Trans

5

4

3

CN4506

Secondary Side 2P Cable
of Sub Trans

5

CN1810

CN4503

2

1

HP_CNT ASSY

F

30

1

2 3 4

N-70A-K