JVC KD-ADV7380J User manual

SERVICE MANUAL
COPYRIGHT © 2007 Victor Company of Japan, Limited No.MA312
2007/4
DVD/CD RECEIVER
MA31220074SERVICE MANUAL
KD-ADV7380J, KD-DV7300J, KD-DV7301E,
KD-DV7301EU, KD-DV7302E, KD-DV7302EU,
KD-DV7304UI, KD-DV7305U, KD-DV7305UN,
KD-DV7305UT, KD-DV7305A, KD-DV7306U,
KD-DV7306UN, KD-DV7306UT, KD-DV7306A,
KD-DV7307EE, KD-DV7308EE, KD-DV7388UF
COPYRIGHT © 2007 Victor Company of Japan, Limited
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
KD-DV7301
KD-DV7302
KD-DV7307
KD-DV7308
KD-ADV7380
KD-DV7300
KD-ADV7380
KD-DV7300

1-2 (No.MA312)
SPECIFICATION
KD-ADV7380/KD-DV7300
AUDIO AMPLIFIER SECTION
Power Output 20 W RMS × 4 Channels at 4 Ω and [< or =] 1% THD+N
Signal to Noise Ratio 80 dBA (reference: 1 W into 4
Ω )
Load Impedance 4
Ω (4 Ω to 8 Ω allowance)
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz
Level ±10 dB
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length: 660 nm
Output level: -21 dBm to -15 dBm
Line-Out Level/Impedance KD-ADV7380: 5.0 V/20 k
Ω load (full scale)
KD-DV7300: 2.5 V/20 k
Ω load (full scale)
Output Impedance 1 k
Ω
Subwoofer-out Level/Impedance 2.5 V/20 k Ω load (full scale)
Color system NTSC
Video Output (composite) 1 Vp-p/75
Ω
Other Terminal CD changer, Steering wheel remote input (for KD-ADV7380), LINE IN, 2nd AU-
DIO OUT
TUNER SECTION
Frequency Range FM 87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz)
87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)
AM 530 kHz to 1 710 kHz (with channel interval set to 10 kHz)
531 kHz to 1 602 kHz (with channel interval set to 9 kHz)
FM Tuner Usable Sensitivity 11.3 dBf (1.0
µ V/75 Ω )
50 dB Quieting Sensitivity 16.3 dBf (1.8
µ V/75 Ω )
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
AM Tuner Sensitivity 20
µ V
Selectivity 35 dB
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
CD, fs=44.1 kHz 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
DivX/MPEG Video Video Max. Resolution 720
× 480 pixels (30 fps)
720
× 576 pixels (25 fps)
Audio Bit Rate DivX: 32 kbps - 320 kbps
MPEG Video: 32 kbps - 320 kbps
Sampling Frequency: DivX MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
Sampling Frequency: MPEG Video 32 kHz, 44.1 kHz, 48 kHz
MP3 Bit Rate 32 kbps - 320 kbps
Sampling Frequency MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
WMA Bit Rate 32 kbps - 320 kbps
Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz
AAC Bit Rate 16 kbps - 320 kbps
Sampling Frequency 44.1 kHz, 48 kHz

(No.MA312)1-3
Design and specifications are subject to change without notice.
KD-DV7302/KD-DV7301
WAV Quantization Bit Rate 16 bit
Sampling Frequency 44.1 kHz
USB SECTION
USB Standard USB 1.1/USB 2.0
Data Transfer Rate Full Speed Max. 12 Mbps
Low Speed Max. 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 12/16/32
Playable Audio/Video Format DivX/MPEG Video/MP3/WMA/AAC/WAV
Max. Current 500 mA
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0
° C to +40 ° C (32 ° F to 104 ° F)
Dimensions (W
× H × D) Installation Size (approx.) 182 mm × 52 mm × 158 mm (7-3/16" × 2-1/16" × 6-1/4")
Panel Size (approx.) 188 mm
× 58 mm × 12 mm (7-7/16" × 2-5/16" × 1/2")
Mass (approx.) 1.6 kg (3.6 lbs) (excluding accessories)
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output (RMS) Front/Rear 19 W per channel into 4
Ω , 40 Hz to 20 000 Hz at no more than 0.8% total har-
monic distortion
Load Impedance 4
Ω (4 Ω to 8 Ω allowance)
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz
Level ±10 dB
Signal to Noise Ratio 70 dB
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length: 660 nm
Output level: -21 dBm to -15 dBm
Line-Out Level/Impedance 2.5 V/20 k
Ω load (full scale)
Output Impedance 1 k
Ω
Subwoofer-out Level/Impedance 2.5 V/20 k Ω load (full scale)
Color system PAL
Video Output (composite) 1 Vp-p/75
Ω
Other Terminal CD changer, steering wheel remote input, LINE IN, 2nd AUDIO OUT
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM (MW) 522 kHz to 1 620 kHz
(LW) 144 kHz to 279 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0
µ V/75 Ω )
50 dB Quieting Sensitivity 16.3 dBf (1.8
µ V/75 Ω )
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
MW Tuner Sensitivity/Selectivity 20
µ V/35 dB
LW Tuner Sensitivity 50
µ V
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)

1-4 (No.MA312)
Design and specifications are subject to change without notice.
KD-DV7304
Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
CD, fs=44.1 kHz 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
DivX/MPEG Video Video Max. Resolution 720
× 480 pixels (30 fps)
720
× 576 pixels (25 fps)
Audio Bit Rate DivX: 32 kbps - 320 kbps
MPEG Video: 32 kbps - 320 kbps
Sampling Frequency: DivX MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
Sampling Frequency: MPEG Video 32 kHz, 44.1 kHz, 48 kHz
MP3 Bit Rate 32 kbps - 320 kbps
MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
Sampling Frequency MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
WMA Bit Rate 32 kbps - 320 kbps
Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz
AAC Bit Rate 16 kbps - 320 kbps
Sampling Frequency 44.1 kHz, 48 kHz
WAV Quantization Bit Rate 16 bit
Sampling Frequency 44.1 kHz
USB SECTION
USB Standard USB 1.1/USB 2.0
Data Transfer Rate Full Speed Max. 12 Mbps
Low Speed Max. 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 12/16/32
Playable Audio/Video Format DivX/MPEG Video/MP3/WMA/AAC/WAV
Max. Current 500 mA
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0
° C to +40 ° C
Dimensions (W
× H × D) Installation Size (approx.) 182 mm × 52 mm × 158 mm
Panel Size (approx.) 188 mm
× 58 mm × 12 mm
Mass (approx.) 1.6 kg (excluding accessories)
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output (RMS) Front/Rear 19 W per channel into 4
Ω , 40 Hz to 20 000 Hz at no more than 0.8% total har-
monic distortion
Load Impedance 4
Ω (4 Ω to 8 Ω allowance)
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz
Level ±10 dB
Signal to Noise Ratio 70 dB
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length: 660 nm
Output level: -21 dBm to -15 dBm
Line-Out Level/Impedance 2.5 V/20 k
Ω load (full scale)
Output Impedance 1 k
Ω
Subwoofer-out Level/Impedance 2.5 V/20 k Ω load (full scale)
Color system PAL/NTSC

(No.MA312)1-5
Design and specifications are subject to change without notice.
Video Output (composite) 1 Vp-p/75 Ω
Other Terminal CD changer, LINE IN, 2nd AUDIO OUT
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 602 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0
µ V/75 Ω )
50 dB Quieting Sensitivity 16.3 dBf (1.8
µ V/75 Ω )
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
AM Tuner Sensitivity/Selectivity 20
µ V/35 dB
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
CD, fs=44.1 kHz 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
DivX/MPEG Video Video Max. Resolution 720
× 480 pixels (30 fps)
720
× 576 pixels (25 fps)
Audio Bit Rate DivX: 32 kbps - 320 kbps
MPEG Video: 32 kbps - 320 kbps
Sampling Frequency: DivX MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
Sampling Frequency: MPEG Video 32 kHz, 44.1 kHz, 48 kHz
MP3 Bit Rate 32 kbps - 320 kbps
Sampling Frequency MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
WMA Bit Rate 32 kbps - 320 kbps
Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz
WAV Quantization Bit Rate 16 bit
Sampling Frequency 44.1 kHz
USB SECTION
USB Standard USB 1.1/USB 2.0
Data Transfer Rate Full Speed Max. 12 Mbps
Low Speed Max. 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 12/16/32
Playable Audio/Video Format DivX/MPEG Video/MP3/WMA/AAC/WAV
Max. Current 500 mA
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0
° C to +40 ° C
Dimensions (W
× H × D) Installation Size (approx.) 182 mm × 52 mm × 158 mm
Panel Size (approx.) 188 mm
× 58 mm × 12 mm
Mass (approx.) 1.6 kg (excluding accessories)

1-6 (No.MA312)
KD-DV7306/KD-DV7305
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output (RMS) Front/Rear 19 W per channel into 4
Ω , 40 Hz to 20 000 Hz at no more than 0.8% total har-
monic distortion
Load Impedance 4
Ω (4 Ω to 8 Ω allowance)
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz
Level ±10 dB
Signal to Noise Ratio 70 dB
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length: 660 nm
Output level: -21 dBm to -15 dBm
Line-Out Level/Impedance 2.5 V/20 k
Ω load (full scale)
Output Impedance 1 k
Ω
Subwoofer-out Level/Impedance 2.5 V/20 k Ω load (full scale)
Color system PAL/NTSC
Video Output (composite) 1 Vp-p/75
Ω
Other Terminal CD changer, LINE IN, 2nd AUDIO OUT
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 602 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0
µ V/75 Ω )
50 dB Quieting Sensitivity 16.3 dBf (1.8
µ V/75 Ω )
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
AM Tuner Sensitivity/Selectivity 20
µ V/35 dB
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
CD, fs=44.1 kHz 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
DivX/MPEG Video Video Max. Resolution 720
× 480 pixels (30 fps)
720
× 576 pixels (25 fps)
Audio Bit Rate DivX: 32 kbps - 320 kbps
MPEG Video: 32 kbps - 320 kbps
Sampling Frequency: DivX MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
Sampling Frequency: MPEG Video 32 kHz, 44.1 kHz, 48 kHz
MP3 Bit Rate 32 kbps - 320 kbps
Sampling Frequency MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
WMA Bit Rate 32 kbps - 320 kbps
Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz
WAV Quantization Bit Rate 16 bit
Sampling Frequency 44.1 kHz
USB SECTION
USB Standard USB 1.1/USB 2.0
Data Transfer Rate Full Speed Max. 12 Mbps
Low Speed Max. 1.5 Mbps

(No.MA312)1-7
Design and specifications are subject to change without notice.
KD-DV7308/KD-DV7307
Compatible Device Mass storage class
Compatible File System FAT 12/16/32
Playable Audio/Video Format DivX/MPEG Video/MP3/WMA/WAV
Max. Current 500 mA
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0
° C to +40 ° C
Dimensions (W
× H × D) Installation Size (approx.) 182 mm × 52 mm × 158 mm
Panel Size (approx.) 188 mm
× 58 mm × 12 mm
Mass (approx.) 1.6 kg (excluding accessories)
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output (RMS) Front/Rear 19 W per channel into 4
Ω , 40 Hz to 20 000 Hz at no more than 0.8% total har-
monic distortion
Load Impedance 4
Ω (4 Ω to 8 Ω allowance)
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz
Level ±10 dB
Signal to Noise Ratio 70 dB
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length: 660 nm
Output level: -21 dBm to -15 dBm
Line-Out Level/Impedance 2.5 V/20 k
Ω load (full scale)
Output Impedance 1 k
Ω
Subwoofer-out Level/Impedance 2.5 V/20 k Ω load (full scale)
Color system PAL
Video Output (composite) 1 Vp-p/75
Ω
Other Terminal CD changer, LINE IN, 2nd AUDIO OUT
TUNER SECTION
Frequency Range FM1/FM2 87.5 MHz to 108.0 MHz
FM3 65.00 MHz to 74.00 MHZ
AM MW: 522 kHz to 1 620 kHz
LW: 144 kHz to 279 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0
µ V/75 Ω )
50 dB Quieting Sensitivity 16.3 dBf (1.8
µ V/75 Ω )
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
MW Tuner Sensitivity 20
µ V
Selectivity 35 dB
LW Tuner Sensitivity 50
µ V
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
CD, fs=44.1 kHz 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit

1-8 (No.MA312)
Design and specifications are subject to change without notice.
DivX/MPEG Video Video Max. Resolution 720 × 480 pixels (30 fps)
720
× 576 pixels (25 fps)
Audio Bit Rate DivX: 32 kbps - 320 kbps
MPEG Video: 32 kbps - 320 kbps
Sampling Frequency: DivX MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
Sampling Frequency: MPEG Video 32 kHz, 44.1 kHz, 48 kHz
MP3 Bit Rate 32 kbps - 320 kbps
Sampling Frequency MPEG-1: 32 kHz, 44.1 kHz, 48 kHz
MPEG-2: 16 kHz, 22.05 kHz, 24 kHz
WMA Bit Rate 32 kbps - 320 kbps
Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz
AAC Bit Rate 16 kbps - 320 kbps
Sampling Frequency 44.1 kHz, 48 kHz
WAV Quantization Bit Rate 16 bit
Sampling Frequency 44.1 kHz
USB SECTION
USB Standard USB 1.1/USB 2.0
Data Transfer Rate Full Speed Max. 12 Mbps
Low Speed Max. 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 12/16/32
Playable Audio/Video Format DivX/MPEG Video/MP3/WMA/AAC/WAV
Max. Current 500 mA
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0
° C to +40 ° C
Dimensions (W
× H × D) Installation Size (approx.) 182 mm × 52 mm × 158 mm
Panel Size (approx.) 188 mm
× 58 mm × 12 mm
Mass (approx.) 1.6 kg (excluding accessories)

(No.MA312)1-9
SECTION 1
PRECAUTION
1.1 Safety Precautions
!Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
!Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.

1-10 (No.MA312)
1.2 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.3 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a
time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.4 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land before the card wire is disconnected from the connector on the pickup unit.
(If the card wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the card wire.
1M
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
Mechanism control board
CN101
Flexible wire
Short-circuit points