LG SH2 User manual

SERVICE MANUAL
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
Internal Use Only
2.1 ch Sound Bar
MARCH, 2016P/NO : AFN77457385
MODEL: SH2 (SH2, SPH2B-P)
MODEL: SH2
(SH2, SPH2B-P)

1-1
CONTENTS
SECTION 1 ........ GENERAL
SECTION 2 ........ CABINET & MAIN CHASSIS
SECTION 3 ........ ELECTRICAL
SECTION 4 ........ REPLACEMENT PARTS LIST

1-2
SECTION 1
GENERAL
CONTENTS
ESD PRECAUTIONS......................................................................................................................................... 1-3
HIDDEN KEY MODE ......................................................................................................................................... 1-4
FIRMWARE UPDATE........................................................................................................................................ 1-5
SPECIFICATIONS ............................................................................................................................................. 1-6

1-3
ESD PRECAUTIONS
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components
commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated
circuits and some field-effect transistors and semiconductor chip components. The following techniques should
be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device, which should be removed for potential shock reasons
prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface
such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can
generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD
devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are
ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the
protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER
SAFETY PRECAUTIONS.
8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate
static electricity sufficient to damage an ESD device).
CAUTION. GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS
INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED
“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF
ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE
SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE
LITERATURE.

1-4
HIDDEN KEY MODE
HIDDEN MODE ENTRANCE
KEY
EXIT
KEY DISPLAY RESULT
Version
Check
Front ‘Vol(-)’ +
Remote control
‘STANDARD’
for 3 seconds.
Remote control
‘STANDARD’,
POWER OFF
NA
SW version will be output by voice through Speaker
with below order.
You can select each version by Volume +/- key.
1) DSP
2) CHECKSUM
3) Touch IC
4) EQ
ex)
1) D1512222
2) 4A3B
3) T1507081
4) E1511261
USB SW
update
Front ‘Vol(-)’ +
Remote control
‘Vol(+)’
for 3 seconds.
Remote control
‘F’ (Function),
POWER OFF
Turn on all of
4 white LED
During SW update, 4 white LED will turn on
one by one and circularly.

1-5
1. To update the Firmware
1) Copy the firmware upgrade file to a empty USB
device. Make sure the USB device is empty before
transferring the firmware upgrade file.
2) Hold the Volume(+) key on the remote control unit
for 3 seconds, while pushing the Volume(-) button on
the main unit. Then, the mode will be changed to the
USB update mode. (see 3). (Do not need to change
the input function on the main unit)
3) When the USB upgrade mode is ready, all the 4
function LED lamps will be on.
4) Plug the USB device into the USB port on the
back side of the main unit. The update process will
be started automatically. (The unit will automatically
reads the file from the USB device) The progress will
be displayed sequentially on 4 LED lamps on the
main unit. (See the picture of 3)
5) Complete the firmware update. When the update is
successfully completed, the unit goes into the standby
mode after the automatic reset. When the unit goes
into the standby mode, the red LED lamp will be on.
(Will take about 2 minutes)
2. Urgent Firmware update description
If the function LED lamps are sequentially lighting for
more than 3 minutes, unplug the power. After waiting
all the lamps go off, plug the power again, and then,
the Urgent firmware update function will automatically
restart the update. After the process will be the same
with 4 above. (The USB device should be remained
on the USB port)
3. How to check the firmware version
If the main unit is on the stand-by mode, put the pow-
er on with the power button. Hold the "standard" key
on the remote controller for 3 seconds while holding
the Volume(-) button on the main unit. Then, the main
unit mode will be changed into the version-check
mode, and can listen the current version information.
The new firmware version is "201512222." If the
firmware version was updated, the main unit will say
D1512222. (20 is omitted, and the letter "D", meaning
of DSP firmware) Push the "Standard" key once more
when escaping from the version-check mode.
FIRMWARE UPDATE

1-6
SPECIFICATIONS
• GENERAL
Power requirements 120 V ~ 60 Hz
Power consumption 25 W
Networked standby : 0.5 W
(If all network ports are activated.)
Dimensions (W x H x D) Approx. 880 mm x 62 mm x 90 mm
(34.6 inch x 2.4 inch x 3.5 inch)
Net Weight Approx. 1.8 kg (3.9 lb)
Operating temperature 5 °C to 35 °C (41 °F to 95 °F)
Operating humidity 5 % to 90 %
Available Digital Input Audio Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
Available Digital Input Audio format Dolby Digital, PCM
• INPUTS
OPT. IN (Digital audio in) 3 V (p-p), Optical jack x 1
PORT. IN (Portable in) 2 Vrms (3.5 mm stereo jack) x 1
• AMPLIFIER (RMS OUTPUT POWER)
Total 100 W
Front 25 W x 2 (4 Ωat 1 kHz, THD 10%)
Subwoofer 50 W (4 Ωat 100 Hz, THD 10%)
• SUBWOOFER
Type 1 Way 1 Speaker
Impedance 4 Ω
Rated Input Power 50 W
Max. Input Power 100 W
Dimensions (W x H x D) Approx.156 mm x 300 mm x 281 mm
(6.1 inch x 11.8 inch x 11.0 inch)
Net Weight Approx. 2.9 kg (6.3 lb)
• Designs and specifications are subject to change without prior notice.

2-1
SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
EXPLODED VIEWS ........................................................................................................................................... 2-3
1. MAIN UNIT SECTION............................................................................................................................... 2-3
2. SUBWOOFER SECTION.......................................................................................................................... 2-7
3. PACKING ACCESSORY SECTION ......................................................................................................... 2-8

2-2

485
251
A42
262
B/T
CABLE3
485
A53
258
A54
258
485
A45
485
485
485
266
485
485
485
A52
264
JACK
MAIN
SMPS
B
A
G
I
E
E
A
J
I
J
F
B
C
GD
F
H
CABLE4
A47
486
485 A46
486
486
A48
A55
265
A43
C
D
CABLE5
CABLE6
263
485
267
TOUCH KEY
LED
CABLE2
CABLE1
256
257
H
300
EXPLODED VIEWS
1. MAIN UNIT SECTION
NOTES) THE EXCLAMATION POINT WITHIN AN
EQUILATERAL TRIANGLE IS INTENDED
TO ALERT THE SERVICE PERSONNEL
TO THE PRESENCE OF IMPORTANT
SAFETY INFORMATION IN SERVICE
LITERATURE.

A900
2. SUBWOOFER SECTION

801 Owner’s manual 835 Wall bracket
806 Optical cable 836 Screws
900 Remote control
803 Packing, Main
802 Box
804 Bag
3. PACKING ACCESSORY SECTION

3-1
SECTION 3
ELECTRICAL
CONTENTS
ONE POINT REPAIR GUIDE ............................................................................................................................ 3-2
1. NO POWER PROBLEM ......................................................................................................................... 3-2
2. SPEAKER NO SOUND........................................................................................................................... 3-3
3. PORTABLE FUNCTION DOESN’T WORK (OPTIONAL PART)............................................................ 3-4
4. BT FUNCTION DOESN’T WORK........................................................................................................... 3-5
5. OPTICAL FUNCTION DOESN’T WORK ................................................................................................ 3-6
6. PROTECTION......................................................................................................................................... 3-7
ELECTRICAL TROUBLESHOOTING GUIDE................................................................................................... 3-9
1. SMPS PART (POWER ON).................................................................................................................... 3-9
2. SYSTEM PART..................................................................................................................................... 3-10
3. NO AUDIO OUTPUT ............................................................................................................................ 3-11
WAVEFORMS OF MAJOR CHECK POINT.................................................................................................... 3-12
1. SYSTEM PART-1 (X-TAL).................................................................................................................... 3-12
2. SYSTEM PART-2 (I2S SIGNAL) .......................................................................................................... 3-13
3. SYSTEM PART-3 (I2C SIGNAL) .......................................................................................................... 3-14
WIRING DIAGRAM.......................................................................................................................................... 3-15
BLOCK DIAGRAMS ........................................................................................................................................ 3-17
1. SYSTEM BLOCK DIAGRAM ................................................................................................................ 3-17
2. POWER BLOCK DIAGRAM ................................................................................................................. 3-19
CIRCUIT DIAGRAMS ...................................................................................................................................... 3-21
1. SMPS CIRCUIT DIAGRAM .................................................................................................................. 3-21
2. MAIN - AMP & POWER CIRCUIT DIAGRAM ...................................................................................... 3-23
3. MAIN - DSP CIRCUIT DIAGRAM......................................................................................................... 3-25
4. JACK/ LED/ TOUCH KEY CIRCUIT DIAGRAM ................................................................................... 3-27
CIRCUIT VOLTAGE CHART........................................................................................................................... 3-29
1. ICs......................................................................................................................................................... 3-29
2. DIODES ................................................................................................................................................ 3-29
3. CAPACITORS....................................................................................................................................... 3-30
4. CONNECTORS..................................................................................................................................... 3-31
PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 3-33
1. SMPS P. C. BOARD DIAGRAM ........................................................................................................... 3-33
2. MAIN P. C. BOARD DIAGRAM ............................................................................................................ 3-33
3. JACK P. C. BOARD DIAGRAM ............................................................................................................ 3-37
4. LED P. C. BOARD DIAGRAM .............................................................................................................. 3-37
5. TOUCH KEY P. C. BOARD DIAGRAM ................................................................................................ 3-37

3-2
ONE POINT REPAIR GUIDE
1. NO POWER PROBLEM
No power problem occurs when you power on. (No LED Sens.)
1-1. DSP (Micom) IC101
1-1-1. Solution
Replace IC101, IC105, X101 on MAIN board.
1-1-2. How to troubleshoot (Countermeasure)
1) Please check Vcc voltage. (pin A4, A10, D4, D14, P4, P14, U5, U6, U9 of IC101 3.3 V)
If 3.3 V voltage doesn’t come out, Replace IC602.
2) Please check Vcc voltage. (pin A9, E9, J4, J14, P9, P12, T10, U4 of IC101 1.2 V)
If 1.2 V voltage doesn’t come out, Replace IC603.
3) Please check Crystal Frequency (X101) 24 MHz and Replace it.
4) Please check RESET voltage. (pin T11 of IC101 3.3 V)
If 3.3 V voltage doesn’t come out, Replace IC106 and R161.
5) Please check P-Sens voltage. (pin A6 of IC101 3.3 V)
1-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
< Schematic point >
0
C616
C628
C617
C625
R177
R125
R129
R123
C633
R
A
C144
C142
R184
R145R147
R152
FB652
C127 R176
C621 R162
R169
R182
C128
RA10
2
RA104
RA101
C143
C618 R610
C612
RA103
C626
R611
R609
C614
C611
R179
R138 R139
R131
R132 R133
R146
R128
R106
R107
R108
R109
R105
R111
R104
IC106
APX809
C126
R167
R171
R180
TPS563200_DD
IC601
R149 R144
R140 R148
R137
R121
R126
R124
Q121
Q122
C103 R103
TPS563200_DD
IC603
FB651
R151 C145
FB641
C613
L603
C627
C634
X101
24M
BD2242G
IC602
To Touch Led
PN110
R
E
K
15
110
A
5
IC101
MLC3730S
R146
R162
C109 C112
R151
R164
R168 R169 R170
R144 R145
R149
R150
APX809-29SA
IC106
R163 R161
C120
C118
DF3D6.8MS
D123
R147
R148
C111 C108
FB111
PN551
R153
R166
E5 VSS33IS
B1 PGPA09
C1 PGPA10
D4 VDD33IO
C2 PGPA11
D2 PGPA12
D1 PGPA13
E1 PGPA14
E2 PGPA15
E4 PGPA00
F1 PGPB01
F2 PGPB00
G1 PGPB02
G2 PGPB03
F4 PGPB04
H2 PGPB05
G5 PGPD13
H1 PGPB06(Boot(0))
G4 PGPD14
J1 PGPB07(Boot(1))
H4 PGPD15
J2 PGPB08
J4 VDD12INT
J5 VSS12INT
K2 PGPB09
K4 PGPC12
K1 PGPB10
L4 PGPC13
L5 PGPC14
L1 PGPB11
L2 PGPB12
M4 PGPC15
M2
M1 PGPB14
N4 PGPC00
N2 PGPC01
P2 PGPC02
P1 PGPC03
R1 PGPC04
R2 PGPC05
T2 PGPC06
P4 VDD33IO
N5 VSS33IO
T1 PGPC07
P5 PGPE00
U1 PGPC08
P6 PGPE01
U2 PGPC09
P7 PGPC10
U3 PGPE03 N7 PGPE03
T3 PGPC11
P8 PGPE04
U4 VDD12CORE
T4 VSS12CORE
U5 VDD33USB20
T5 PUID20 T6 PUVBUS20 T7 VSS33USB20
U7 PUDP20
T8 PRTUNE20
U8 PUDN20
T9 VSS33USB20
P9 VDD12USB20
N9 VSS12USB20 U9 VDD33OSC
U10 PXI U11 PXO U12 VSS33OSC
T10 PDD12ALIVE T11 PTEST T13 PREMOCON(PGPE(10)) T12 PRESETN
P10 PGPE05 P11 PGPE06
U14 PSPDIFRX(PGPE(12))
T14 PEXTSRC0(PGPE(13))
N11 PGPE07
T15 PEXTSRC1(PGPE(14))
U15 PWAKEUP
T16 VDD30RTC
U16 PRTCXI U17 PRTCXO
P12 VDD12PLL P13 VSS12PLL
N13
VSS33IO
P14
VDD33IO
T17
PAD (12 )
R16
PAD (9) R17
PAD (11)
P16
PAD (8)
P17
PAD (7)
N17
PAD (6)
N16
PAD (5)
N14
PAD (4)
M14
PGPD05
M17
PSDCLK
L13
PGPD06
L14
PGPD07
M16
PSDCKE
K14
PGPD08
L17
PSDDQM(1)
J13
VSS12CORE
J14
VDD12CORE
L16
PSDDQM(0)
H14
PGPD09
K16
PAD (3)
G14
PGPD10
K17
PSDCSN
J17
PSDCASN G13
PGPD11
F14
PGPD12
J16
PSDRASN
H16
PSDWEN
H17
PAD (0)
G17
PAD (1)
G16
PAD (2)
F17
PAD (10 )
F16
PSDBA(0)
E14
PSDBA(1)
E16
PD(8)
E17
PD(9)
D17
PD(10)
D16
PD(11)
C16
PD(12)
C17
PD(13)
B17
PD(14)
E13
VSS33IO
D14
VDD33IO
A17
PD(15) A16
PD(0) B16 PD(1) B15 PD(2) A15 PD(3) A14 PD(4) B14 PD(5) B13 PD(6) A13 PD(7)
E9
VDD12CORE
D10
PNTRST D13
PGPD00 D9
PTDI D12
PGPD01 D8
PTMS E11
PGPD02 D7
PTCK D11
PGPD03 E7
PTDO D6
PRTCK A12
PGPA00 B12 PGPA01 B11 PGPA02 A11 PGPA03
B10
VSS33IO
A10
VDD33IO
B9
VSS12CORE
A9
VDD12CORE
B8
VSSUSB11
A7
PUDN11 A8
PUDP11
B7
VDDUSB11
D5
PAIN(4)
B6
PAIN(3)
A6
PAIN(2)
A5
PAIN(1)
B5
PAIN(0)
B4
VSS33ADC
A4
VDD33ADC
A3
PGPA04
B2
PGPA06 B3 PGPA05
A2
PGPA07
A1
PGPA08
N1 PGPB15
U6 VDD33USB20
U13 PHUARTRX(PGPE(11))
R619
C633
10uF(2)
C626
C616
10uF(2)
C611
R618
R620
R612 R613
R609 R610
R626
10uF(2)
C627 C621
C622
C634
3.38VA
10uF(2)
C628
10uF(2)
C625
C613
4
R621
R616
C618
R611
TPS563200_DD
IC601
NR6045T_3R0M
L602
R622
C620
NR6045T_2R3M
L603
C619
10uF(2)
C623
R617
R614
R615
C614
TPS563200_DD
IC603
C612
10uF(2)
BD2242G
IC602
IC101
IC101
IC602
IC602
IC603
IC603
X101
X101
IC106
IC106
IC101
IC101
IC602
IC602
IC603
IC603
X101
X101
IC106
IC106

3-3
ONE POINT REPAIR GUIDE
2. SPEAKER NO SOUND
No Sound when you TURN ON the unit.
2-1. Digital AMP (IC701, IC702)
2-1-1. Solution
Replace IC701, IC702 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 V of IC701, IC702 pin13.
If 3.3 V voltage doesn’t come out, Replace IC602.
2) Please check 15 V of IC701, IC702 pin2, 3, 34, 35.
If 15.0 V voltage doesn’t come out, Replace SMPS Circuit.
3) Please check 3.3 V of IC701, IC702 pin14, 19, 25.
If 3.3 V voltage doesn’t come out, check IC101 pin B3, D8, D9.
4) Please check I2S signal of IC701, IC702 pin15, 20, 21, 22 and Replace it.
2-1-3. Service hint (Any picture / Remark)
< MAIN board bottom view >
< Schematic point >
R717
C712
R703
R720
R719
C711
C704
R716
C706
C707 C714 C715 C728
C735
C708
C709
R718
R713
R704
C702
R715
R714
R706
R705
C705
R702
R701
C701
NO VIA, CLO
S
C734
C731
C733
C732
TAS5733
IC701
FB702
R722
C713 C723 C729
R735
C752 R721
R729
R707
R723
C710
C741
C716 C717 C719
C754
C730
R734
R731
R733
C765
R732
C764
FB703
C753
R737
C763
R724
R736
R708
R730
C742
TAS5733
IC702
C760
C703
IC701
IC701
IC702
IC702

3-4
R936 R937
C925
EUROPE
C929
100nF
R935 R938
C927
C928
R939
100nF
C926
R940
C921
C922
R911
PN507
10022HS,ST
Slave Mode
I2S, 24Bit
C924
PN506
10022HS,ST
C923
IC921
ONE POINT REPAIR GUIDE
3. PORTABLE FUNCTION DOESN’T WORK (OPTIONAL PART)
3-1. ADC (IC921)
3-1-1. Solution
Replace IC921, PN506 on MAIN board.
3-1-2. How to troubleshoot (Countermeasure)
1) Please check 5.0 V of IC921 pin3.
If 5.0 V voltage doesn’t come out, Replace IC605.
2) Please check 3.3 V of IC921 pin4.
If 3.3 V voltage doesn’t come out, Replace IC602.
3) Please check analog input signal of PN506 pin4, 6.
If signal doesn’t come out, Replace PN506 & JK552.
3-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
< Schematic point >
0V
0V
( )
21V
0036A
option
21V CHECK
Assy No
P/N : 6870S-0036A
SH2 PV [MAIN]
2015. 11. 27
D751
C926
R935
R936
C922
C921
R716
R717
C705
R129
R123
C206
R662
R661
RA100
C144
C142
R757
D752
C720
C722
C735
C712
C928
R203
R136
R664
ZD622
R19J
RA102
RA104
RA101
C143
C725
RA103
R758
R704
C708
R701
R703
C927
C924
R938
R131
R132 R133
R146
R128
R106
R107
R108
R109
R105
R111
R104
R217
R221
R222
Debug Monitor
CN103
R180
R19B R19A R19C R19D
R19H
R189
C148
ZD661
R665
FB654
Q751
C757
C174 C175 C176 C177
10
PN506
Q752
C721 C737
PN701
C701
C704
IC921
PCM1808
R137
R121
R126
R124
R235 R917 R234 R232
R237 C231 R236 R233
C222
C103 R103
X201
24.576MHz(SX-1)
CS8422
IC201
R19K R19G R19Q R19P
C123 C122
W25Q32FVS
IC105
Q661
OV
G
RC201
R24FV1A
R715
R714
R912
R218
R223
R224
R231
C223
PN507
C121
10
PN261
Bt Module
L701
R19ER19F
C153
PN551
DOWNLOAD JIG
PN601
POWER
L702
CN104
Debug
R
E
K
15
110
A
5
IC101
MLC3730S
IC921
IC921
IC921
IC921
PN506
PN506
PN506
PN506

3-5
C268
C222 C225 C223 C224
FB261
R139
R125
R120
R138
C221
R116
1
C769
C107
R134
R131
R127
R123
R118
R112
R108
R106
R104
172.04M-->221BEAD
R132
R133
R137
R135
R122
R141
R124
R126
R128
R114
R119
R113
R105
R109
R103
R107
PN261
R121
R129
R111
E5 VSS33IS
B1 PGPA09
C1 PGPA10
C2 PGPA11
D2 PGPA12
D1 PGPA13
E1 PGPA14
E2 PGPA15
E4 PGPA00
F1 PGPB01
F2 PGPB00
G1 PGPB02
G2 PGPB03
F4 PGPB04
H2 PGPB05
G5 PGPD13
H1 PGPB06(Boot(0))
G4 PGPD14
J1 PGPB07(Boot(1))
H4 PGPD15
J2 PGPB08
J4 VDD12INT
J5 VSS12INT
K2 PGPB09
K4 PGPC12
K1 PGPB10
L4 PGPC13
L5 PGPC14
L1 PGPB11
L2 PGPB12
M4 PGPC15
M2
M1 PGPB14
N4 PGPC00
N2 PGPC01
P2 PGPC02
P1 PGPC03
R1 PGPC04
R2 PGPC05
T2 PGPC06
P4 VDD33IO
N5 VSS33IO
T1 PGPC07
P5 PGPE00
U1 PGPC08
P6 PGPE01
U2 PGPC09
P7 PGPC10
U3 PGPE03 N7 PGPE03
T3 PGPC11
P8 PGPE04
U4 VDD12CORE
T4 VSS12CORE
U5 VDD33USB20
T5 PUID20 T6 PUVBUS20 T7 VSS33USB20
U7 PUDP20
T8 PRTUNE20
U8 PUDN20
T9 VSS33USB20
P9 VDD12USB20
N9 VSS12USB20 U9 VDD33OSC
U10 PXI U11 PXO U12 VSS33OSC
T10 PDD12ALIVE
N1 PGPB15
U6 VDD33USB20
ONE POINT REPAIR GUIDE
4. BT FUNCTION DOESN’T WORK
4-1. BT Module
4-1-1. Solution
Replace IC101, PN261 MAIN board.
4-1-2. How to troubleshoot (Countermeasure)
1) Please voltage check 3.3 V of PN261 pin1.
If 3.3 V voltage doesn’t come out, Replace IC601.
2) Please check IC101 pin L1, L2, K1, K2, M2, P7, N7 signal and Replace it.
3) Please check PN261 pin2, 3, 4, 5, 7, 9, 10 signal and Replace it.
4) Check BT Module.
4-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
< Schematic point >
0V
0V
( )
21V
0036A
option
21V CHECK
Assy No
0036B
P/N
:
6870S
-
0036A
SH2 PV [MAIN]
2015. 11. 27
Q754
D751
C926
C744
R935
R936
C922
C921
7
54
4
R721
R716
R717
C705
R125
R129
R123
C206
R662
R661
RA100
C144
C142
R757
D752
5
0
C726
C720
C722
C735
C712
C928
R203
R136
R152 R664
ZD622
R19J
C128
RA102
RA104
RA101
C143
C725
RA103
C605
R769
R767
R772
R758
C723
C703
R733
R704
C708
R701
R703
C927
C924
R938
R138 R139
R131
R132 R133
R146
R128
R106
R107
R108
R109
R105
R111
R104
R217
R221
R222
R167
R171
R180
R19B R19A R19C R19D
R19H
R189
C148
ZD661
R665
FB654
Q751
7
27
7
46
C761
C757
PN702
C174 C175 C176 C177
10
PN506
Q752
C721 C737
PN701
C701
C704
IC921
PCM1808
R137
R121
R126
R124
R235 R917 R234 R232
R237 C231 R236 R233
C222
C103 R103
X201
24.576MHz(SX-1)
CS8422
IC201
R19K R19G R19Q R19P
C12 C12
R151 C145
W25Q32FVS
IC105
Q661
R715
R714
R912
R218
R223
R224
X101
C601
R231
C223
PN507
C12
10
PN261
Bt Module
L701
R19ER19F
C153
DOWNLOAD JIG
PN601
POWER
L702
R
E
K
15
110
A
5
IC101
MLC3730S
IC101
IC101
PN261
PN261
PN261
PN261

3-6
R237
R218
C211
C213
R221
R222
R203
C222 C225 C223 C224
C231
C103
C203
FB201
C202
C205
C206 R236
R215
R234
C101
C221
R213
R214
C104
R233
R232
R231
C102
R211
R212
R216
R217
R223 R224
FB221
R202
R235
R917
C201
R108
R106
R104
172.04M-->221BEAD
R105
R109
R103
R107
R111
RC201
ONE POINT REPAIR GUIDE
5. OPTICAL FUNCTION DOESN’T WORK
5-1. DIR (IC201)
5-1-1. Solution
Replace IC201 on MAIN board & JK551 on JACK board.
5-1-2. How to troubleshoot (Countermeasure)
1) Please voltage check 3.3 V of JK551 pin3.
If 3.3 V voltage doesn’t come out, Replace IC601.
2) Please voltage check 3.3 V of IC201 pin3, 19, 22.
If signal doesn’t come out, Replace IC602.
3) Please check Crystal Frequency (X201) 24.576 MHz and Replace it.
4) Please check SPDIF Signal of IC201 pin6 and Replace it.
5-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
< Schematic point >
0V
0V
( )
21V
0036A
option
21V CHECK
Assy No
P/N : 6870S-0036A
SH2 PV [MAIN]
2015. 11. 27
D751
C926
R935
R936
C922
C921
R716
R717
C705
R129
R123
C206
R662
R661
RA100
C144
C142
R757
D752
C720
C722
C735
C712
C928
R203
R136
R664
ZD622
R19J
RA102
RA104
RA101
C143
C725
RA103
R758
R704
C708
R701
R703
C927
C924
R938
R131
R132 R133
R146
R128
R106
R107
R108
R109
R105
R111
R104
R217
R221
R222
Debug Monitor
CN103
R180
R19B R19A R19C R19D
R19H
R189
C148
ZD661
R665
FB654 C129
Q751
C757
C174 C175 C176 C177
10
PN506
Q752
C721 C737
PN701
C701
C704
IC921
PCM1808
R137
R121
R126
R124
R235 R917 R234 R232
R237 C231 R236 R233
C222
C103 R103
X201
24.576MHz(SX-1)
CS8422
IC201
R19K R19G R19Q R19P
C123 C122
W25Q32FVS
IC105
Q661
OV
G
RC201
R24FV1A
R715
R714
R912
R218
R223
R224
R231
C223
PN507
C121
10
PN261
Bt Module
L701
R19ER19F
C153
PN551
DOWNLOAD JIG
PN601
POWER
L702
CN104
Debug
R
E
K
15
110
A
5
IC101
MLC3730S
X201
X201
IC201
IC201
X201
X201

3-7
ONE POINT REPAIR GUIDE
6. PROTECTION
6-1. Protection-1
6-1-1. Solution
Replace IC701, IC702 (AMP IC) on MAIN board.
6-1-2. How to troubleshoot (Countermeasure)
1) After MAIN SET power off, check Red LED blink at intervals of 1 sec.
2) Turn MAIN SET power on again.
3) Check PVDD voltage (21 V) of PN601 pin1, 2.
- If PVDD voltage has 6.0 V under, refer to SMPS board repair guide.
4) Check SVCC33 voltage (3.3 V) of IC701, IC702 pin13, 27.
- If SVCC33 voltage has 2.7 V under, refer to 3.3 V no power repair guide.
5) Check impedance (4 Ω) of speaker unit.
- If impedance of speaker unit has 2 Ωunder, replace speaker unit .
6) If check point 3), 4), 5) is OK, replace IC701, IC702 (AMP IC) on MAIN bottom board.
6-1-3. Service hint (Any picture / Remark)
< MAIN board bottom view >
< MAIN board top view >
0V
0V
GD AMP SCL
( )
21V
0036A
Rev 2.0
option
21V CHECK
Assy No
0036B
AMP SDA
6
3
Q754
D751
C926
C744
C754
R722
C764
R721
R716
R717
C705
C
625
R177
R125
R129
R123
C206
3
3R662
R661
RA100
C144
C142
R757
D752
C748 C750
C726
C720
C722
C735
C712
C928
R184
R145R147
R203
R136
R152
FB652
R
ZD6
2
R19J
C127 R176
C621 R162
R169
R182
C128
RA102
RA104
RA101
C143
C725
8 0
C612
RA103
C626
5
3
6
5
D753
C605
R769
R767
R772
R758
R732
R707
C723
C703
R733
R704
C708
R701
R703
C
611
R179
R138 R139
R131
R132 R133
R146
R128
R106
R107
R108
R109
R105
R111
R104
IC106
APX809
C126
R167
R171
R180
R19B R19A R19C R19D
R19H
R189
C148
ZD661
C606
L601
Q751
R728 C759
R727 C746
C743
PN703
C761
C757
PN702
10
PN5
0
Q752
C721 C737
PN701
C752
C701
C704
IC921
PCM1808
R149 R144
R140 R148
R137
R121
R126
R124
Q121
Q122
R235 R917 R234 R232
R237 C231 R236 R233
C222
C103 R103
R19K R19G R19Q R19P
FB651
R151 C145
FB641
Q661
C
753
C613
L602 L603
C627
C634
R729
R735
R715
R714
R912
X101
24M
C601
IC604
AP6503
L703
R231
C223
PN5
0
PN261
Bt Module
L701
To Touch Led
PN110
R19ER19F
C153
PN601
POWER
L702
R
E
K
15
110
A
5
IC101
MLC3730S
IC701
IC701
(AMP IC)
(AMP IC)
IC702
IC702
(AMP IC)
(AMP IC)
PN601
PN601