Pioneer X-HM81-K User manual

ORDER NO.
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
2012
2012 Printed in Japan
X-HM81-KRRV4322
NETWORK CD RECEIVER SYSTEM
X-HM81-K
X-HM81-S
X-HM71-K X-HM71-S
NETWORK CD RECEIVER
XC-HM81-K XC-HM81-S
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Type Power Requirement Remarks
X-HM81-K, X-HM81-S SYXE8 AC 220 V to 240 V
XC-HM81-K, XC-HM81-S SYXE8 AC 220 V to 240 V
X-HM71-K, X-HM71-S SYXE8 AC 220 V to 240 V
X-HM71-K CXE AC 120 V
X-HM71-S AXQ5 AC 220 V
K-MZV AUG.

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SAFETY INFORMATION
WARNING
This product may contain a chemical known to the State of California to cause cancer, or birth defects or other reproductive
harm. Health & Safety Code Section 25249.6 - Proposition 65
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.
For CD Wave length (typ) : 790 nm
Operation output : 3 mW CW, Class 1
Maximum output : Class 1 (Under fault condition)
Laser Pickup specifications and Laser characteristics
LABEL CHECK
CXE model
SYXE8model
AXQ5 model

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CONTENTS
SAFETY INFORMATION..........................................................................................................................................................2
1. SERVICE PRECAUTIONS....................................................................................................................................................4
1.1 NOTES ON SOLDERING...............................................................................................................................................4
1.2 WHEN REPLACING MECHA.........................................................................................................................................4
1.3 WHEN REPLACING CR870 (Module including BCO Assy)...........................................................................................4
2. SPECIFICATIONS.................................................................................................................................................................5
3. BASIC ITEMS FOR SERVICE ..............................................................................................................................................6
3.1 CHECK POINTS AFTER SERVICING ...........................................................................................................................6
3.2 JIGS LIST.......................................................................................................................................................................6
3.3 PCB LOCATIONS...........................................................................................................................................................7
4. BLOCK DIAGRAM ..............................................................................................................................................................10
4.1 OVERALL WIRING DIAGRAM .....................................................................................................................................10
4.2 OVERALL BLOCK DIAGRAM.......................................................................................................................................12
4.3 POWER SUPPLY BLOCK DIAGRAM...........................................................................................................................14
5. DIAGNOSIS ........................................................................................................................................................................16
5.1 TROUBLESHOOTING..................................................................................................................................................16
5.2 PROTECTION CIRCUIT...............................................................................................................................................21
5.3 POWER MANAGEMENT..............................................................................................................................................24
5.4 CHECKING TERMINALS.............................................................................................................................................25
5.5 IC INFORMATION ........................................................................................................................................................28
6. SERVICE MODE.................................................................................................................................................................31
6.1 SERVICE MODE ..........................................................................................................................................................31
6.2 PROTECT CHECK MODE ...........................................................................................................................................33
6.3 CHECKING THE LCD ..................................................................................................................................................35
6.4 RDS CHARACTERS.....................................................................................................................................................36
7. DISASSEMBLY ...................................................................................................................................................................37
8. EACH SETTING AND ADJUSTMENT................................................................................................................................45
8.1 UPDATING OF THE FIRMWARE.................................................................................................................................45
8.2 INITIAL SETTINGS.......................................................................................................................................................51
9. EXPLODED VIEWS AND PARTS LIST...............................................................................................................................52
9.1 PACKING SECTION.....................................................................................................................................................52
9.2 EXTERIOR SECTION ..................................................................................................................................................54
9.3 SPEAKER SECTION (S-HM81GB, S-HM81SA)..........................................................................................................58
9.4 SPAEKER SECTION (S-HM71)....................................................................................................................................59
10. SCHEMATIC DIAGRAM....................................................................................................................................................60
10.1 CD ASSY....................................................................................................................................................................60
10.2 TUNER and BT ASSYS..............................................................................................................................................62
10.3 MAIN ASSY (1/3)........................................................................................................................................................64
10.4 MAIN ASSY (2/3)........................................................................................................................................................66
10.5 MAIN ASSY (3/3)........................................................................................................................................................68
10.6 BCO ASSY (1/2).........................................................................................................................................................70
10.7 BCO ASSY (2/2).........................................................................................................................................................72
10.8 CNT1 ASSY................................................................................................................................................................74
10.9 CNT2 ASSY................................................................................................................................................................76
10.10 CNT3 ASSY..............................................................................................................................................................78
10.11 F_AUX, F_USB, FRONT and KEY ASSYS ..............................................................................................................80
10.12 DOCKING ASSY ......................................................................................................................................................82
10.13 POWER ASSY..........................................................................................................................................................84
10.14 WAVEFORMS...........................................................................................................................................................86
11. PCB CONNECTION DIAGRAM........................................................................................................................................88
11.1 CD ASSY....................................................................................................................................................................88
11.2 TUNER and BT ASSYS..............................................................................................................................................90
11.3 MAIN ASSY................................................................................................................................................................92
11.4 BCO ASSY .................................................................................................................................................................96
11.5 CNT1, CNT2 and CNT3 ASSYS.................................................................................................................................98
11.6 F_AUX, F_USB, FRONT, KEY and DOCKING ASSYS............................................................................................102
11.7 POWER ASSY..........................................................................................................................................................106
12. PCB PARTS LIST............................................................................................................................................................108

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1. SERVICE PRECAUTIONS
1.1 NOTES ON SOLDERING
1.2 WHEN REPLACING MECHA
1.3 WHEN REPLACING CR870 (Module includingBCO Assy)
• 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 ºC.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 ºC 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.
It is necessary to remove the soldering on the short circuit point after connecting the pickup flexible cable.
Short circuit point
After the CR870 module is replaced alone or the whole BCO Assy, including the CR870, is replaced, the MAC address will be
changed. Replace the MAC address seal with a new one, which you can find enclosed with the service part.
Attach the Mac Address label to the rear panel, above the WLANantenna,
so that it will not block the ventilation holes on the rear panel.
MAC Address seal

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2. SPECIFICATIONS
Amplifier section
RMS Power Output ..................................................... 50 W + 50 W
(1 kHz, 10 % T.H.D., 4 ohms)
Guaranteed speaker impedance....................... 4 ohms to 16 ohms
Headphones.............................................. recommended: 32 ohms
Tuner section
Frequency Range (FM) ................................87.5 MHz to 108MHz
Antenna Input (FM).........................................75 ohms unbalanced
Frequency Range (AM) ..................................522 kHz to 1602 kHz
Antenna (AM) ............................................................Loop antenna
Video section
Signal level (Composite)...................................... 1Vp-p (75 ohms)
Network section
LANterminal................................................................Ethernet jack
10BASE-T/100BASE-TX
Other connectors
Power supply
USB connector...............................................................5 V, 2.1 A
iPod connector................................................................5 V, 1.0 A
ADAPTER Port (X-HM81 and XC-HM81 only)...............5 V, 0.1 A
Miscellaneous
Power source............................................AC 220 Vto 240 V, 50 Hz
Power consumption
Power on................................................................................75 W
Power standby..........................................................0.5 W or less
Network standby....................................................................17 W
Dimensions
Width ................................................................................215 mm
Height (X-HM71)..............................................................131 mm
Height (X-HM81 and XC-HM81)......................................32.2 mm
Depth................................................................................353 mm
Weight (X-HM71)...................................................................5.0 kg
Weight (X-HM81 and XC-HM81)............................................5.5 kg
Speaker (X-HM81 only)
Type
2-way type speaker system
2.5 cm Dome-Tweeter
12 cm Woofer
Maximum input power ..............................................................50 W
Impedance............................................................................4 ohms
Dimensions
Width ................................................................................156 mm
Height...............................................................................266 mm
Depth................................................................................258mm
Weight ........................................................................... 4.3 kg/each
Speaker (X-HM71 only)
Type
2-way type speaker system
2 cm Dome-Tweeter
12 cm Woofer
Maximum input power ..............................................................50 W
Impedance............................................................................4 ohms
Dimensions
Width ................................................................................148mm
Height...............................................................................263 mm
Depth................................................................................208mm
Weight ........................................................................... 2.7 kg/each
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® is a registered trademark of NEC
Corporation.
• Remote control
(SYXE8model (AXD7676): 8300767600010-IL)
(CXE, AXQ5 model (AXD7680): 8300768000010-IL)
• AAA size IEC R03 dry cell batteries
(to confirm system operation) x 2
• AM loop antenna
(E601019000010-IL)
• FM wire antenna
(E605010140010-IL)
• WLANantenna
(E600223170010-IL)
• Speaker x 2 (X-HM81 and X-HM71 only)
• Speaker wires x 2 (X-HM81 and X-HM71 only)
(X-HM81, X-HM71/AXQ5: 8952SHM810016-IL)
(X-HM71: 8952SHM700042-IL)
• Non skid pad x 8(X-HM81 only)
(8952SHM810018-IL)
• Warranty card
• Quick Start Guide
(SYXE8model: 5707000006940-IL)
(CXE model: 5707000006970-IL)
(AXQ5 model: 5707000006980-IL)
• Operating instructions (CD-ROM)
(6517000000821-IL)
Accessories

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3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
3.2 JIGS LIST
Item to be checked regarding audio
Distortion
Noise
Volume too low
Volume too high
Volume fluctuating
Sound interrupted
See the table below for the items to be checked regarding audio.
No. Check pointsProcedure
1
Confirm whether the customer complain has been solved.
The customer complain must not be reappeared.
Audio and operations must be normal.
6
Check the tuner operations.
Audio and operations (station search etc.) must be normal.
5
Check the Wi-fi antenna.
Confirm whether you refer to "5.4 CHECKING TERMINALS"
-"2. Checking the Wi-Fi Antenna", and the SSID of the wireless
LANrouter is displayed.
7
Check the Line input playback. Audio and operations must be normal.
3
Check the USB playback.
Audio and operations must be normal.
4
Check the internet radio or Network audio playback.
Audio and operations must be normal.
2Check the CD playback. Audio and operations (search etc.) must be normal.
Items to be checked after servicing
To keep the product quality after servicing, confirm recommended check points shown below.
8
Check the appearance of the product. No scratches or dirt on its appearance after receiving it
for service.
Jigs List Jig Name Part No. Remarks
BtoB extension jig cable GGD1770 Diagnosis (POWER Assy ↔CD Assy)
RS-232C update jig GGF1642 Firmware update
BtoB extension jig cable GGD1812 Diagnosis (MAINAssy ↔CD Assy)
BtoB extension jig cable GGD1811 Diagnosis (MAINAssy ↔CNT1 Assy)
FPC Extension jig GGD1813 Diagnosis (FRONT Assy ↔CNT3 Assy)
Extension jig FFC GGD1774 Diagnosis (MECHA ↔CD Assy)
3P Extension jig cable GGD1773 Diagnosis (MAINAssy ↔CNT2 Assy)
4P Extension jig cable GGD1809 Diagnosis (FRONT Assy ↔CNT3 Assy)
Diagnosis (CNT2 Assy ↔CNT3 Assy)BtoB extension jig cable GGD1810
Service remote control unit GGF1381 Service mode

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3.3 PCB LOCATIONS
L
KEY ASSY
BCO_STOPPER ASSY
M
DOCKING ASSY
J
F_USB ASSY
H
CNT3 ASSY
A
CD ASSY
D
MAINASSY
I
F_AUX ASSY
K
FRONT ASSY
F
CNT1 ASSY
N
POWER ASSY
G
CNT2 ASSY
E
BCO ASSY
B
TUNER ASSY
C
BT ASSY
(X-HM81 only)
MECHA
Cabinet (Bottom view)

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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.
Mark Symbol and Description
Mark Symbol and Description
X-HM81-K
/SYXE8X-HM81-S /SYXE8XC-HM81-K /SYXE8XC-HM81-S /SYXE8
X-HM71-K
/SYXE8X-HM71-K /CXE X-HM71-S /SYXE8X-HM71-S /AXQ5
NSP
NSP
1..PCB TOTAL ASSY FRONT 7025MU1105030-IL 7025MU1105030-IL 7025MU1105030-IL 7025MU1105030-IL
7025MU1106050-IL 7025MU1106020-IL 7025MU1106050-IL 7025MU1106020-IL
2..FRONT ASSY 7028072531010-IL 7028072531010-IL 7028072531010-IL 7028072531010-IL
7028072531010-IL 7028072531010-IL 7028072531010-IL 7028072531010-IL
2..KEY ASSY 7028072533010-IL 7028072533010-IL 7028072533010-IL 7028072533010-IL
2..CNT1 ASSY • • • • • • • • • • • • • • • • • • • •
NSP 2..CNT1 ASSY • • • • • • • • • • • • • • • • • • • •
NSP 2..CNT3 ASSY • • • • • • • • • • • • • • • • • • • •
NSP 2..CNT3 ASSY • • • • • • • • • • • • • • • • • • • •
NSP 2..BCO_STOPPER ASSY • • • • • • • • • • • • • • • • • • • •
NSP 2..BCO_STOPPER ASSY • • • • • • • • • • • • • • • • • • • •
7028072533010-IL 7028072533010-IL 7028072533010-IL 7028072533010-IL
2..TUNER ASSY 7028072534030-IL 7028072534030-IL 7028072534030-IL 7028072534030-IL
7028072534060-IL 7028072534040-IL 7028072534060-IL 7028072534040-IL
2..F_AUX ASSY 7028072535010-IL 7028072535010-IL 7028072535010-IL 7028072535010-IL
7028072535010-IL 7028072535010-IL 7028072535010-IL 7028072535010-IL
2..F_USB ASSY 7028072536010-IL 7028072536010-IL 7028072536010-IL 7028072536010-IL
7028072536010-IL 7028072536010-IL 7028072536010-IL 7028072536010-IL
2..BT ASSY 7028072537010-IL 7028072537010-IL 7028072537010-IL 7028072537010-IL
Not used Not used Not used Not used
NSP 1..PCB TOTAL ASSY POWER 7025MU1105031-IL 7025MU1105031-IL 7025MU1105031-IL 7025MU1105031-IL
7025MU1106051-IL 7025MU1106021-IL 7025MU1106051-IL 7025MU1106031-IL
2..MAIN ASSY 7028072541030-IL 7028072541030-IL 7028072541030-IL 7028072541030-IL
7028072541060-IL 7028072541040-IL 7028072541060-IL 7028072541050-IL
2..POWER ASSY 7028072542030-IL 7028072542030-IL 7028072542030-IL 7028072542030-IL
7028072542030-IL 7028072542040-IL 7028072542030-IL 7028072542030-IL
2..DOCKING ASSY 7028072544010-IL 7028072544010-IL 7028072544010-IL 7028072544010-IL
7028072544010-IL 7028072544010-IL 7028072544010-IL 7028072544010-IL
NSP 1..PCB TOTAL ASSY BRIDG 7025MU1105032-IL 7025MU1105032-IL 7025MU1105032-IL 7025MU1105032-IL
7025MU1106022-IL 7025MU1106022-IL 7025MU1106022-IL 7025MU1106022-IL
2..BCO ASSY 7028072551010-IL 7028072551010-IL 7028072551010-IL 7028072551010-IL
7028072551020-IL 7028072551020-IL 7028072551020-IL 7028072551020-IL
2..CNT2 ASSY 7028072552010-IL 7028072552010-IL 7028072552010-IL 7028072552010-IL
7028072552020-IL 7028072552020-IL 7028072552020-IL 7028072552020-IL
1...PCB TOTAL ASSY CD 7025MU1105034-IL 7025MU1105034-IL 7025MU1105034-IL 7025MU1105034-IL
7025MU1105034-IL 7025MU1105034-IL 7025MU1105034-IL 7025MU1105034-IL
2..CD ASSY 7028072301010-IL 7028072301010-IL 7028072301010-IL 7028072301010-IL
7028072301010-IL 7028072301010-IL 7028072301010-IL 7028072301010-IL
MECHA
NSP 1..PCB TOTAL ASSY FRONT
2..FRONT ASSY
2..KEY ASSY
2..TUNER ASSY
2..F_AUX ASSY
2..F_USB ASSY
2..BT ASSY
NSP 1..PCB TOTAL ASSY POWER
2..MAIN ASSY
2..POWER ASSY
2..DOCKING ASSY
NSP 1..PCB TOTAL ASSY BRIDG
2..BCO ASSY
2..CNT2 ASSY
1...PCB TOTAL ASSY CD
2..CD ASSY
MECHA
8030000010080-IL 8030000010080-IL 8030000010080-IL 8030000010080-IL
8030000010080-IL 8030000010080-IL 8030000010080-IL 8030000010080-IL

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4. BLOCK DIAGRAM
4.1 OVERALL WIRING DIAGRAM
I
F_AUX ASSY
(7028072535010-IL)
J
F_USB ASSY
(7028072536010-IL)
K
FRONT ASSY
(7028072531010-IL)
LCD
H
CNT3 ASSY
CP30 CP31
CP607
CN510
CP19
CP18
FPC2
CP606
CP512
CP509
CP602
CP712
CP605
CP400
CN702
CP8
PN1702
1: A_+12V
2: A_+12V
3: A_GND
4: A_GND
5: A_-12V
6: A_-12V
7: A_GND
8: CD_L
9: A_GND
10: CD_R
11: M_GND
12: M_GND
13: CD_RX
14: CD_TX
15: CD_RST
16: MAIN_BUSY
17: NC
1: VFD_CE
2: VFD_CLK
3: VFD_DI
1: B+_27V
2: B+_27V
3: AMP_GND
4: AMP_GND
5: LCH_AMP_GND
6: LCH_AMP_GND
7: RCH_AMP_GND
8: RCH_AMP_GND
9: B-_27V
10: B-_27V
11: RLY_GND
12: RLY_GND
13: AMP_-5V
14: AMP_-5V
15: POWER_PROT
16: AMP_+5V
17: PD
18: STBY_RLY
19: M_GND
20: M_GND
21: MICOM_3V9
22: MICOM_3V9
23: DGND
24: DGND
25: NC
26: NC
1: SW_GND
2: SW_OUT
3: A_GND
4: BT/TU_R
5: A_GND
6: BT/TU_L
7: A_GND
8: USB_R
9: A_GND
10: USB_L
11: A_GND
12: LINE_IN_R
13: A_GND
14: LINE_IN_L
15: A_GND
16: A_GND
17: A_GND
18: +12V
19: +12V
1: SW_GND
2: SW_OUT
3: A_GND
4: BT/TU_R
5: A_GND
6: BT/TU_L
7: A_GND
8: USB_R
9: A_GND
10: USB_L
11: A_GND
12: LINE_IN_R
13: A_GND
14: LINE_IN_L
15: A_GND
16: A_GND
17: A_GND
18: +12V
19: +12V
1: +12V
2: +12V
3: A_GND
4: A_GND
5: -12V
6: -12V
7: A_GND
8: CD_L
9: A_GND
10: CD_R
11: M_GND
12: M_GND
13: CD_RX
14: CD_TX
15: CD_RST
16: MAIN_BUSY
17: NC
1: LCDGND
2: LCDGND
3: IOVCC(+3.3V)
4: IOVCC(+3.3V)
1: HP_R 2: H/P_GND 3: HP_L 4: H/P_GND 5: FAUX_R 6: AUX_GND 7: FAUX_L 8: HP_DET
1: GND 2: GND 3: IOVCC(+3.3V) 4: IOVCC(+3.3V)
1: CPU_GND 2: KEY2
1: GND 2: VCI(+3.3V) 3: RESX 4: DB0/B0 5: DB1/B1 6: DB2/B2 7: DB3/B3 8: DB4/B4 9: DB5/B5 10: DB6/G0 11: DB7/G1 12: DB8/G2 13: DB9/G3 14: DB10/G4 15: DB11/G5 16: DB12/R0 17: DB13/R1 18: DB14/R2 19: DB15/R3 20: DB16/R4 21: DB17/R5 22: CSX 23: SCL 24: DE 25: DOTCLK 26: HSYNC 27: VSYNC 28: SDA 29: LED-A+ 30: LED-K1 31: LED-K2 32: LED-K3 33: LED-K4 34: IOVCC(+3.3V) 35: GND
1: USB_VCC 2: USB_VCC 3: USBHO_D- 4: USBHO_D+ 5: USB_GND 6: USB_GND 7: NC
1: DAC_RST
2: AUDIO_SEL
3: SUB_PDN
4: SUB_IRQ
5: SUB_ON
6: SUB_RESET
7: MAIN_IRQ
8: SCDI_MAIN
9: SCDO_MAIN
10: CSCK_MAIN
11: I_POD_DET
12: GPIO2_DAB_RX
13: SDIO_DAB_TX
14: TU_SCLK
15: TU_SEN
16: TU/DAB_RST
17: SW_MUTEBASE
18: VIDEO_MUTE
19: IPOD_CHARGE_LED
20: POWER_ON_LED
21: KEY2
22: KEY1
23: REMOTE
24: TIMER_LED
25: VOLUME+
26: VOLUME-
27: M3V3
28: M3V3_SW
29: CPU_GND
30: CPU_GND
31: CPU_GND
1: HP_R 2: H/P_GND 3: HP_L 4: H/P_GND 5: FAUX_R 6: AUX_GND 7: FAUX_L 8: HP/DET
1: VIDEO_GND
2: VIDEO_GND
3: DOCK_CVBS
4: SW_GND
5: SW_OUT
6: A_GND
7: LINE_IN_R
8: A_GND
9: LINE_IN_L
10: A_GND
11: DAB/TU_R
12: A_GND
13: DAB/TU_L
14: A_GND
15: VIDEO_MUTE
16: SW_MUTEBASE
17: TU/DAB_RST
18: TU_SEN
19: TU_SCLK
20: GPIO2 DAB_RX
21: SDIO DAB_TX
22: A_GND
23: A_GND
24: TU_+5V
25: TU_+5V
CP31
1: USB_R
2: A_GND
3: USB_L
4: +12V
5: +12V
6: DAC_RESET
7: AUDIO_SEL
8: SW_GND
9: SW_OUT
10: A_GND
11: LINE_IN_R
12: A_GND
13: LINE_IN_L
14: A_GND
15: BT/TU_R
16: A_GND
17: BT/TU_L
18: A_GND
19: VIDEO_MUTE
20: SW_MUTEBASE
21: TU_RST(DAB_RST)
22: TU_SEN
23: TU_SCLK
24: SDIO DAB_RX
25: GPIO2 DAB_TX
26: I_POD_DET
27: CSCK_MAIN
28: SCDO_MAIN
29: SCDI_MAIN
30: MAIN_IRQ
31: SUB_RESET
32: SUB_ON
33: SUB_IRQ
CP30
1: RESX
2: DB0/B0
3: DB1/B1
4: DB2/B2
5: DB3/B3
6: DB4/B4
7: DB5/B5
8: DB6/G0
9: DB7/G1
10: DB8/G2
11: DB9/G3
12: DB10/G4
13: DB11/G5
14: DB12/R0
15: DB13/R1
16: DB14/R2
17: DB15/R3
18: DB16/R4
19: DB17/R5
20: SCL
21: DE
22: CSX
23: DOTCLK
24: HSYNC
25: VSYNC
26: SDA
27: LED-A+
28: LED-CTL
29: IOVCC(+3.3V)
30: IOVCC(+3.3V)
31: GND
32: GND
33: SUB_PDN
FPC2
1: CPU_GND
2: M3V3_SW
3: M3V3
4: KEY2
5: KEY1
6: CPU_GND
7: REMOTE
8: TIMER_LED
9: VOLUME+
10: VOLUME-
11: RESX
12: DB0/B0
13: DB1/B1
14: DB2/B2
15: DB3/B3
16: DB4/B4
17: DB5/B5
18: DB6/G0
19: DB7/G1
20: DB8/G2
21: DB9/G3
22: DB10/G4
23: DB11/G5
24: DB12/R0
25: DB13/R1
26: DB14/R2
27: DB15/R3
28: DB16/R4
29: DB17/R5
30: CSX
31: SCL
32: DE
33: DOTCLK
34: HSYNC
35: VSYNC
36: SDA
37: LED-A+
38: LED-CTL
39: LED_B
40: LED_A
1: CPU_GND 2: M3V3_SW 3: M3V3 4: KEY2 5: KEY1 6: CPU_GND 7: REMOTE 8: TIMER_LED 9: VOLUME+ 10: VOLUME- 11: RESX 12: DB0/B0 13: DB1/B1 14: DB2/B2 15: DB3/B3 16: DB4/B4 17: DB5/B5 18: DB6/G0 19: DB7/G1 20: DB8/G2 21: DB9/G3 22: DB10/G4 23: DB11/G5 24: DB12/R0 25: DB13/R1 26: DB14/R2 27: DB15/R3 28: DB16/R4 29: DB17/R5 30: CSX 31: SCL 32: DE 33: DOTCLK 34: HSYNC 35: VSYNC 36: SDA 37: LED-A+ 38: LED-CTL 39: LED_B 40: LED_A
1: BT
2: AG
3: BT
4: GN
5: SU
6: SU
7: SU
8: MA
9: CS
10: S
11: S
12: M
13: IP
14:
M
15: V
16: D
17: D
18: D
19: D
20: V
21: V
22: V
23: A
24: A
25: A
CP11
1: RESX
2: DB0/B0
3: DB1/B1
4: DB2/B2
5: DB3/B3
6: DB4/B4
7: DB5/B5
8: DB6/G0
9: DB7/G1
10: DB8/G2
11: DB9/G3
12: DB10/G4
13: DB11/G5
14: DB12/R0
15: DB13/R1
16: DB14/R2
17: DB15/R3
18: DB16/R4
19: DB17/R5
20: CSX
21: SCL
22: DE
23: DOTCLK(GND_S
24: HSYNC
25: VSYNC
26: SDA
27: LED-A+
28: LED-CTL(SPSW
29: IOVCC(+3.3V)
30: IOVCC(+3.3V)
31: GND
32: GND
33: GND
CP12
1: BT_R
2: AGND
3: BT_L
4: AGND
5: SUB_IRQ
6: SUB_RESET
7: SUB_PDN
8: MAIN_SUB_IPOD_DET
9: CSK_MAIN
10: SCDO_MAIN
11: SCDI_MAIN
12: MAIN_IRQ
13: DOCKING_CVBS
14: MAIN_USB_POWER
15: VGND
16: DM-870-SCLK
17: DM-870-MCLK
18: DM-870-LRCK
19: DM-870-DATA
20: VFD_DI
21: VFD_CLK
22: VFD_CE
23: AMP-5V
24: AMP+5V
25: NC
CN515
CP500
CP508
FPC515
MOD500
CP604
-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.
B
(7028072534030-IL: X-HM81, XC-HM81)
(7028072534060-IL: X-HM71/SYXE8)
(7028072534040-IL: X-HM71/CXE, AXQ5)
D
MAIN ASSY
(7028072541030-IL: X-HM81, XC-HM81)
(7028072541060-IL: X-HM71/SYXE8)
(7028072541040-IL: X-HM71/CXE)
(7028072541050-IL: X-HM71/AXQ5)
D1/3- D3/3
TUNER ASSY
1: B+_27V
2: B+_27V
3: AMP_GND
4: AMP_GND
5: AMP_GND_L
6: AMP_GND_L
7: AMP_GND_R
8: AMP_GND_R
9: B-_27V
10: B-_27V
11: SPKRLY_GND
12: SPKRLY_GND
13: AMP_-5V
14: AMP_-5V
15: AMP_+5V
16: POWER_PROT
17: P/D
18: STBY_RLY
19: M_GND
20: M_GND
21: MICOM_3V9
22: MICOM_3V9
23: DGND
24: DGND
25: NC
26: NC
CP18
1: DAC_RST
2: AUDIO_SEL
3: SUB_PDN
4: SUB_IRQ
5: SUB_ON
6: SUB_RESET
7: MAIN_IRQ
8: SCDI_MAIN
9: SCDO_MAIN
10: CSCK_MAIN
11: I_POD_DET
12: GPIO2_DAB_RX
13: SDIO_DAB_TX
14: TU_SCLK
15: TU_SEN
16: TU/DAB_RST
17: SW_MUTEBASE
18: VIDEO_MUTE
19: IPOD_CHARGE_LED
20: POWER_ON_LED
21: KEY2
22: KEY1
23: REMOTE
24: TIMER_LED
25: VOLUME+
26: VOLUME-
27: M3V3
28: M3V3_SW
29: CPU_GND
30: CPU_GND
31: CPU_GND

11
X-HM81-K
56 7 8
56 7 8
A
B
C
D
E
F
C
BT ASSY
(7028072537010-IL)
-IL)
MECHA
(8030000010080-IL)
M
DOCKING ASSY
(7028072544010-IL)
A
CD ASSY
(7028072301010-IL)
F
CNT1 ASSY
L
KEY ASSY
(7028072533010-IL)
PN1603
PN1602
PN1705
CP310
CP312
CP710
712
CP402
CP402
CN511
CP1001
CP6
CP2
CP4
CP1
CP5
CN702
CP8
CP8
CP7
CP7
CP12
CP505 CP506
CP11
CP301
AC IN
PN1702
1: A_+12V
2: A_+12V
3: A_GND
4: A_GND
5: A_-12V
6: A_-12V
7: A_GND
8: CD_L
9: A_GND
10: CD_R
11: M_GND
12: M_GND
13: CD_RX
14: CD_TX
15: CD_RST
16: MAIN_BUSY
17: NC
1: MOTRO_GND
2: MOTRO_GND
3: MOTRO_+8V
4: MOTRO_+8V
5: CD_GND
6: CD_GND
7: CD_3V3
8: CD_3V3
9: NC
10: A_+12V
11: A_+12V
12: A_GND
13: A_GND
14: A_-12V
15: A_-12V
1: MOT_GND
2: MOT_GND
3: MOT_+8V
4: MOT_+8V
5: CD3.3V_GND
6: CD3.3V_GND
7: CD_3.3V
8: CD_3.3V
9: NC
10: A_+12V
11: A_+12V
12: A_GND
13: A_GND
14: A_-12V
15: A_-12V
1: CPU_GND 2: KEY2
1: CPU_GND 2: KEY2
1: VIDEO_GND
2: VIDEO_GND
3: DOCK_CVBS
4: SW_GND
5: SW_OUT
6: A_GND
7: LINE_IN_R
8: A_GND
9: LINE_IN_L
10: A_GND
11: DAB/TU_R
12: A_GND
13: DAB/TU_L
14: A_GND
15: VIDEO_MUTE
16: SW_MUTEBASE
17: TU/DAB_RST
18: TU_SEN
19: TU_SCLK
20: DAB_RX GPIO2
21: DAB_TX SDIO
22: A_GND
23: A_GND
24: TU_+5V
25: TU_+5V
CP505
1: USB_R
2: A_GND
3: USB_L
4: +12V
5: +12V
6: DAC_RESET
7: AUDIO_SEL
8: SW_GND
9: SW_OUT
10: A_GND
11: LINE_IN_R
12: A_GND
13: LINE_IN_L
14: A_GND
15: BT/TU_R
16: A_GND
17: BT/TU_L
18: A_GND
19: VIDEO_MUTE
20: SW_MUTEBASE
21: TU_RST(DAB_RST)
22: TU_SEN
23: TU_SCLK
24: SDIO DAB_RX
25: GPIO2 DAB_TX
26: I_POD_DET
27: CSCK_MAIN
28: SCDO_MAIN
29: SCDI_MAIN
30: MAIN_IRQ
31: SUB_RESET
32: SUB_ON
33: SUB_IRQ
CP506
1: RESX
2: DB0/B0
3: DB1/B1
4: DB2/B2
5: DB3/B3
6: DB4/B4
7: DB5/B5
8: DB6/G0
9: DB7/G1
10: DB8/G2
11: DB9/G3
12: DB10/G4
13: DB11/G5
14: DB12/R0
15: DB13/R1
16: DB14/R2
17: DB15/R3
18: DB16/R4
19: DB17/R5
20: SCL
21: DE
22: CSX
23: DOTCLK
24: HSYNC
25: VSYNC
26: SDA
27: LED-A+
28: LED-CTL
29: IOVCC(+3.3V)
30: IOVCC(+3.3V)
31: GND
32: GND
33: SUB_PDN
1: BT_R
2: AGND
3: BT_L
4: GND
5: SUB_IRQ
6: SUB_RESET
7: SUB_PDN
8: MAIN_IPOD_DET
9: CSK_MAIN
10: SCDO_MAIN
11: SCDI_MAIN
12: MAIN_IRQ
13: IPOD_CVBS
14:
MAIN_USB_POWER (NC)
15: VGND
16: DM-870-SCLK
17: DM-870-MCLK
18: DM-870-LRCK
19: DM-870-DATA
20: VFD_DI
21: VFD_CLK
22: VFD_CE
23: AMP-5V
24: AMP+5V
25: AMP+5V
1: GND
2: GND
3: GND
4: IOVCC(+3.3V)
5: IOVCC(+3.3V)
6: LED-CTL(SPSW)
7: LED-A+
8: SDA
9: VSYNC
10: HSYNC
11: DOTCLK
12: DE
13: CLK
14: CSX
15: DB17/R5
16: DB16/R4
17: DB15/R3
18: DB14/R2
19: DB13/R1
20: DB12/R0
21: DB11/G5
22: DB10/G4
23: DB9/G3
24: DB8/G2
25: DB7/G1
26: DB6/G0
27: DB5/B5
28: DB4/B4
29: DB3/B3
30: DB2/B2
31: DB1/B1
32: DB0/B0
33: RESX
CP11
1: RESX
2: DB0/B0
3: DB1/B1
4: DB2/B2
5: DB3/B3
6: DB4/B4
7: DB5/B5
8: DB6/G0
9: DB7/G1
10: DB8/G2
11: DB9/G3
12: DB10/G4
13: DB11/G5
14: DB12/R0
15: DB13/R1
16: DB14/R2
17: DB15/R3
18: DB16/R4
19: DB17/R5
20: CSX
21: SCL
22: DE
23: DOTCLK(GND_SHIELD)
24: HSYNC
25: VSYNC
26: SDA
27: LED-A+
28: LED-CTL(SPSW)
29: IOVCC(+3.3V)
30: IOVCC(+3.3V)
31: GND
32: GND
33: GND
P12
BT_R
AGND
BT_L
AGND
SUB_IRQ
SUB_RESET
SUB_PDN
MAIN_SUB_IPOD_DET
CSK_MAIN
: SCDO_MAIN
: SCDI_MAIN
: MAIN_IRQ
: DOCKING_CVBS
: MAIN_USB_POWER
: VGND
: DM-870-SCLK
: DM-870-MCLK
: DM-870-LRCK
: DM-870-DATA
: VFD_DI
: VFD_CLK
: VFD_CE
: AMP-5V
: AMP+5V
: NC
1: GND
2: GND
3: GND
4: VDD
5: VDD
6: VDD
7: +5V
8: -5V
1: VFD_DI
2: VFD_CLK
3: VFD_CE
1: -5V 2: +5V 3: BCO_+12V 4: BCO_+12V 5: BCO_+12V 6: BCO_GND 7: BCO_GND 8: BCO_GND
1: D- 2: D+ 3: +5V 4: GND 5: GND 6: IPOD_DET 7: IPOD_CVBS 8: MIITXCLK
1: ACCESSORY_PWR 2: C_VID 3: IPOD_DET 4: D_GND 5: D_GND 6: USB_+5V 7: USB_D+ 8: USB_D-
1: +5V 2: +5V 3: D- 4: D+ 5: GND 6: GND
1: BT_MUTE 2: BT_R 3: AGND 4: BT_L 5: BCO_GND 6: BT_ON/CE 7: BT_+5V 8: BT_ID 9: BT_DET 10: BT_TX/U_RX 11: BT_RX/U_TX 12: BT_/OC
1: BT_MUTE 2: BT_R 3: A_GND 4: BT_L 5: BCO_GND 6: BT_ON/CE 7: BT_+5V 8: BT_ID 9: BT_DET 10: BT_TX/U_RX 11: BT_RX/U_TX 12: BT_/OC
1: SP+ 2: SP- 3: SL+ 4: SL- 5: Limit SW 6: GND
1: CLOSE_SW 2: GND 3: OPEN_SW 4: MOTOR_+ 5: MOTOR_-
1: F- 2: T+ 3: T- 4: F+ 5: PD 6: VR 7: LD 8: GND 9: F 10: C 11: B 12: A 13: D 14: E 15: SVCC 16: VREF
CP508
CN502
PN1604
-HM81, XC-HM81)
-HM71/SYXE8)
-HM71/CXE, AXQ5)
X-HM81,
XC-HM81
ONLY
(7028072551010-IL: X-HM81, XC-HM81)
(7028072551020-IL: X-HM71)
BCO ASSY
E
E1/2- E2/2
NER ASSY
N
POWER ASSY
(7028072542030-IL:
X-HM81,XC-HM81)
(7028072542030-IL:
X-HM71/SYXE8, AXQ5)
(7028072542040-IL:
X-HM71/CXE)
G
CNT2 ASSY
(7028072552010-IL: X-HM81, XC-HM81)
(7028072552020-IL: X-HM71)
1: B+_27V
2: B+_27V
3: AMP_GND
4: AMP_GND
5: AMP_GND_L
6: AMP_GND_L
7: AMP_GND_R
8: AMP_GND_R
9: B-_27V
10: B-_27V
11: SPKRLY_GND
12: SPKRLY_GND
13: AMP_-5V
14: AMP_-5V
15: AMP_+5V
16: POWER_PROT
17: P/D
18: STBY_RLY
19: M_GND
20: M_GND
21: MICOM_3V9
22: MICOM_3V9
23: DGND
24: DGND
25: NC
26: NC
1: MICOM_3V9
2: MICOM_3V9
3: M_GND
4: M_GND
5: STBY_RLY
6: P/D
7: NC
8: POWER_PROT
9: AMP_+5V
10: AMP_+5V
11: AMP_-5V
12: AMP_-5V
13: SPKRLY_GND
14: SPKRLY_GND
15: B-_27V
16: B-_27V
17: AMP_GND_R
18: AMP_GND_R
19: AMP_GND_L
20: AMP_GND_L
21: AMP_GND
22: AMP_GND
23: B+_27V
24: B+_27V
25: BCO_GND
26: BCO_GND
27: BCO_GND
28: BCO_+12V
29: BCO_+12V
30: BCO_+12V
1: MICOM_3V9
2: MICOM_3V9
3: M_GND
4: M_GND
5: STBY_RLY
6: P/D
7: NC
8: POWER_PROT
9: AMP_+5V
10: AMP_+5V
11: AMP_-5V
12: AMP_-5V
13: SPKRLY_GND
14: SPKRLY_GND
15: B-_27V
16: B-_27V
17: AMP_GND
18: AMP_GND
19: AMP_GND
20: AMP_GND
21: AMP_GND
22: AMP_GND
23: B+_27V
24: B+_27V
25: BCO_GND
26: BCO_GND
27: BCO_GND
28: BCO_+12V
29: BCO_+12V
30: BCO_+12V

12 X-HM81-K
12 3 4
A
B
C
D
E
F
12 3 4
4.2 OVERALL BLOCK DIAGRAM
NAND_Flash SDRAM
LCD
KEY
IC4
IC609
IC603
CR870
IC12, 18, 19
IC208
IC704
SYSTEM U
M3030
NJU7391
INPUT SELECT & VOLUME
KFRONT ASSY
EBCO ASSY
DMAINASSY
GCNT2 ASSY
LCD
Note: Be blocks in MAINASSY other than blocks.
(There are some exceptions)

13
X-HM81-K
56 7 8
56 7 8
A
B
C
D
E
F
-6dB
AMP
CVBS
OUT
IR
MOSFET
AMP BLOCK
CD BLOCK
IC1602
IC1603
IC1606
IC1604
IC609
IC608, 612
IC1601
IC605
Q610,615,619,621
IC606
IC400
RMC500
Headphone
OUT
+6dB
IRF6645
IRS2092S
Subwoofer
OUT
Speaker
OUT
DOCKING_VIDEO
LC_FILTER
SYSTEM U-com
M30302
BTUNER ASSY
ACD ASSY
SY

14 X-HM81-K
12 3 4
A
B
C
D
E
F
12 3 4
4.3 POWER SUPPLY BLOCK DIAGRAM
MAINTRANS
AC CORD
B+_27V
BCO_+12V
MOT_+8V
MICOM_
B-_27V
IC301
IC303
IC311
IC315
S2(+12V,-12V)
SUB TRANS
S3(USB/CD)
S1(AMP +B)

15
X-HM81-K
56 7 8
56 7 8
A
B
C
D
E
F
S1
S2
21.5V
13.6V0.46A
2.2A 33V
S3 8.7V4.2A
-33V(NO LOAD)
+33V(NO LOAD)
B+_27V
A_+12V
AMP_+5V
AMP_-5V
A_-12V
BCO_+12V
MOT_+8V
MICOM_3V9
CD_+3.3V
B-_27V
IC301
IC303
IC701
IC11
IC14
IC2
IC9
IC5
IC313
C311
IC315
IC13
IC305
IC307
20.2V
RATED_VOLTAGE NO_LOAD
17.4V
MAINTRANS SPEC(-)
CURRENT

16 X-HM81-K
12 3 4
A
B
C
D
E
F
12 3 4
5. DIAGNOSIS
5.1 TROUBLESHOOTING
• No Power
• Detection DC from AMP circuit.
Check the IC608, IC612 and its peripheral circuits.(MAIN Assy)
• Detection overvoltage on +B line.
Check the D307 and its peripheral circuits.(POWER Assy)
Yes
• Detection abnormality of the AMP circuit.
Check the IC608, IC612 and its peripheral circuits.(MAIN Assy)
Yes
• Detection abnormal temperature of the AMP L ch circuit.
Check the IC608 and its peripheral circuits.(MAIN Assy)
Yes
• Detection short-circuit on power supply circuits.
D307: B+_27V, B-_27V
IC305, IC307: AMP_+5V, AMP_-5V
IC315: MICOM_3V9
IC301, IC303: A_+12V, A_-12V
IC313: CD_3.3V
Check each IC mentioned above and peripheral circuits.
• Check workings of primary relay (RLY301).
• Check whether secondary fuse (FU302 to 305) does not perform blowout.
(POWER Assy)
Yes
No
Protect (protection history)
Does DC protect work?
No
No
No
Does POWER protect
work?
Does AMP protect
work?
• Detection PWM abnormality output of the AMP circuit.
Check the IC608, IC612 and its peripheral circuits.(MAIN Assy)
Yes
Does PWM protect
work?
No
X-HM81, XC-HM81 only
No
• Detection an overcurrent of Bluetooth power
Check the IC600 and its peripheral circuits.
Check the short-circuit of BT_+5V power (BT Assy).
Yes
Yes
Does BT Protect
work?
No
• Detection an overcurrent of power of Front USB or iPod Dock.
Check the IC11 and IC14 and its peripheral circuits.
Check the short-circuit of 5V power of Front USB or iPod Dock
(BCO Assy/DOCKING Assy/F_USB Assy).
Be not the trouble that each Protect circuit works.
Does USB protect
work?
Does
OVERTEMP1 protect
work?
• Detection abnormal temperature of the AMP R ch circuit.
Check the IC612 and its peripheral circuits.(MAIN Assy)
Yes
No
Does
OVERTEMP2 protect
work?

17
X-HM81-K
56 7 8
56 7 8
A
B
C
D
E
F
• No Sound
(*1)The confirmation that is in a state of each sound source
Check the state of each sound source.(*1)
Yes
No
A sound does not come out
of FRONT SP
The sound from a source of CD,
USB, TUNER, iPod, LINE, F.AUX
does not come out.
• Check the IC602 and its peripheral circuits.(MAINAssy)
• Check the MAINMUTE circuit.
No
[Failure in the individual analog-signal paths]
• Check each input circuit part and each Assy.
• Failure in connection for volume IC (IC603).
• Check the IC603 and its peripheral circuits.
No
Yes -> Check the BCO system audio.
(USB/iPod/Ethernet/WIFI/BT)
• Check the IC208and its peripheral circuits.(CNT2 Assy)
• Check the digital audio path between the CR870 (MODULE on BCO
Assy) and IC208.
• Replace the CR870 (MODULE on BCO Assy).
None of the audio of BCO system
outputs it.
• Check the input blocks and its peripheral circuits and power
supply voltages.
• Replace the CR870 (MODULE on BCO Assy).
Output it depending on input
• Check the speaker realy.(MAINAssy)
Yes
Does
a signal output it from
OP-AMP IC (IC602)
pin 1, 7?
• Check the IC608, IC612 and its peripheral circuits.(MAINAssy)
• Check the Q621, Q623, Q640, Q641 and its peripheral circuits.
(MAINAssy)
No
Yes
Does
a signal output it from
AMP IC (IC608, 612)
pin 13?
Does
the sound of CD, Analog
AUX, TUNER, LINE come
out?
Does
a signal output it from
DAC IC (IC208) pin 10,
11?
Check the IC315 and its peripheral circuits.(POWER Assy)
No
MAIN UCOM
Yes
Check the IC601 and its peripheral circuits.(MAINAssy)
Is the
output voltage of the regulator
IC (IC315) for microcomputer power
supply 3.9 V?
• Check the D600.(MAINAssy)
• Check connection between each Assy.
No
Yes
Is 3.3Vsupplied to
MAINUCOM (IC601)?
Check the XTAL600 and its peripheral circuits.(MAINAssy)
No
Yes
Does
the oscillator (XTAL600) for
MAINUCOM (IC601) oscillate
it?
(POWER Assy)
(MAINAssy)
(MAINAssy)
(MAINAssy)
(MAINAssy)
(MAINAssy)
(CNT2 Assy)
Does
the audio signal appear to
coupling condenser arround
volume IC (IC603)?

18 X-HM81-K
12 3 4
A
B
C
D
E
F
12 3 4
A sound does not come out
of headphones • Check the HP DET signal and its peripheral circuits.
No
No • Check the IC605 and its peripheral circuits.(MAIN Assy)
Yes
Yes
When you
connected HP, do hear the
working sound of the SP relay
(a snick sound)?
Does
a signal output it from
HP AMP IC (IC605)
pin 1, 7?
No
• Check the HP MUTE circuit.(MAIN Assy)
• Check the connection between the MAIN Assy and F_AUX Assy.
A sound does not come out
of SW PREOUT • Check the IC606 and its peripheral circuits.(MAIN Assy)
Yes
Does
a signal output it from
OP-AMP IC (IC606)
pin 7?
• Check the SW MUTE circuit.(TUNER Assy)
• Check connection between each Assy.
• CD does not work
CD does not work (playback) • Check connection between each cable.
No
Yes
Is FFC
to connect Pickup Assy and
CD Assy connected?
(MAIN Assy)
(MAIN Assy)
(CD Assy)
• Check whether a cable is arranged neatly.
(A cable do not touch a Disc rotate section)
No
Yes
Is the
cable arranged neatly
arround CD tray section?
• Check the IC311 and its peripheral circuits.(POWER Assy)
No
Yes
Is the
power supply voltage of
the BTL driver (IC1606)
8 V? (CD Assy)
• Check the IC313 and its peripheral circuits.(POWER Assy)
No
Yes
Is the power
supply voltage of the CD UCOM
(IC1604), CD DSP (IC1601)
3.3 V?
(CD Assy)
• Check the IC1604, X1602 and its peripheral circuits.(CD Assy)
No
Yes
Does
the oscillator (X1602) for
CD UCOM oscillate it?
(CD Assy)
• Check the IC1601, X1601 and its peripheral circuits.(CD Assy)
No
Yes
Does
the oscillator (X1601) for
CD DSP (IC1601) oscillate
it? (CD Assy)
• Check the IC1601, X1601 and its peripheral circuits.(CD Assy)
No
Yes
Does a
signal output it from CD DSP
(IC1601) pin 14
(DCLK)?
(CD Assy)
• Check the IC1604 and its peripheral circuits.(CD Assy)
• Check the IC601 pin 51 (CD RESET signal).(MAIN Assy)
No
Yes
Is the signal
of CD UCOM (IC1604) pin 40
(CD RESET) "H"?(CD Assy)
• Check the IC1604 and its peripheral circuits.(CD Assy)
No
Yes
(CD Assy)
• Check the IC1604 and its peripheral circuits.(CD Assy)
No
Yes • Check the IC1601, IC1606 and its peripheral circuits.(CD Assy)
Does signals
output from CD UCOM (IC1604)
pin 25, 27, 28 (MAIN_BUSY,
CD_RX, CD_TX)?
(CD Assy)
Is the signal
of CD UCOM (IC1604) pin 9
(8035 RESET) "H"?

19
X-HM81-K
56 7 8
56 7 8
A
B
C
D
E
F
• Check the connection between the BCO Assy and FRONT Assy.
• Check the IC5 and IC13 and its peripheral circuits.(BCO Assy)
Yes
• Replace the LCD MODULE.
Is LCD
power supply normal?
MOD500 Pin 2,29,34
• Check the connection between the BCO Assy and FRONT Assy.
• Check the IC4 and its peripheral circuits.(BCO Assy)
No
No
Yes
Is the
reset signal of LCD normal?
If MOD500-Pin 3 is "H", its
normal.
• Check the connection between the BCO Assy and FRONT Assy.
No
Yes
Are the
other signals of MOD500
normal?
(FRONT Assy)
(FRONT Assy)
• LCD does not lit
• Do not recognize it in Front USB
• Check the connection of Lug wire between the F_USB Assy and F_AUX Assy.
• Replace the CR870 (MODULE on BCO Assy).
No: Both device NG
• Replace the CR870 (MODULE on BCO Assy).
Mass storage
Device is OK, and is only Apple
Device NG?
• Check the connection between the F_USB Assy and BCO Assy.
• Check the IC9 and its peripheral circuits.(BCO Assy)
No
Yes
Yes
Is the 5V
power supply supplied in 5 and
6 Pins of CP500?
• Check the connection between the F_USB Assy and BCO Assy.
• Check the IC12 and its peripheral circuits.(BCO Assy)
• Replace the CR870 (MODULE on BCO Assy).
No
Yes
Is there USB
signal at 3 and 4 Pins of
CP500?
(F_USB Assy)
CD tray does not do working
(OPEN/CLOSE) • Check connection between each cable.
No
Yes
Are CD Mecha and
CD Assy connected?
(CD Assy)
Yes
(CD Assy)
• Check the IC1601 and its peripheral circuits.(CD Assy)
No
When operating any keys,
does the signals of CD DSP(IC1601)
pin 108, 114 switch to "H" / "L"?
Yes
(CD Assy)
• Check the IC1606 and its peripheral circuits.(CD Assy)
No
When operating any keys,
does the signals of BTL Driver(IC1606)
pin 9, 10 switch to "H" / "L"?
Yes
(CD Assy)
• Check the IC1601 and its peripheral circuits.(CD Assy)
• Replace the CD Deck Motor.
No
When operating any keys,
does the signals of connector (PN1603)
pin 1, 3 switch to H" / "L"?

20 X-HM81-K
12 3 4
A
B
C
D
E
F
12 3 4
iPod video does not display.
• Check theVIDEO SW IC (IC400) and its peripheral circuits.
(TUNER Assy)
• Check connection between each Assy.
No
No• Check the connection between the DOCKING Assy and
TUNER Assy.
Yes
Yes
Does a
CVBS signal output to
connector (CP400)
pin 3?
Does a
CVBS signal output to
connector (CP4)
pin 2?
• Check the internal circuits of the DOCKING Assy.
• Check the setting of iPod/iPhone that is external connection.
(DOCKING Assy)
(TUNER Assy)
Cannot recognize physical connection of iPod/iPhone.
• Check the path of the iPod DET signal between Pin 1 of CP1 (DOCKING Assy)
and Pin 55 of IC609 (MAINAssy). ("L" is normal at iPod/iPhone is connected).
Yes
• Replace the CR870 (MODULE on BCO Assy).
Does the Charge LED
light?
• Check the connection between the DOCKING Assy and BCO Assy.
• Check the IC13 and its peripheral circuits.(BCO Assy)
No
No
Yes
Is the
5Vpower supply supplied
in 23 Pin of CP1?
• Check the connection between the DOCKING Assy and BCO Assy.
• Check the IC12 and its peripheral circuits.(BCO Assy)
• Replace the CR870 (MODULE on BCO Assy).
No
Yes
Is there USB
signal at 25 and 27 Pins of
CP1?
(DOCKING Assy)
• Do not recognize it in iPod Dock
• No Picture (iPodVIDEO)