LG 60PB4DT-UB (CHASSIS:PA72A) Service Manual ▷ View online
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BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
CableCARDTM
Press button 0
(zero)
Press button 0
(zero)
Press button 0
(zero)
Use cursor to
select CABLE
icon
MENU
Host Diagnostics (In
Band Signal Status, OOB
Signal Status, etc)
ALL - works with any
CableCARD
5th Key
4th key
3rd key
2nd key
1st key
Diagnostic Type
CableCARD
Mfg
8. If the installer determines that the DCR device is the problem (unit failed either item 2a or 3b above) and can go no furth
er in correcting the problem,
and if the installer determines that the host-pod pairing screen cannot be displayed with multiple CableCARDs, he or she sh
ould follow the directions
given by the CE manufacturer in informing the customer of their options. usually involving either a return of the DCR devic
e to the retail outlet
from which it was purchased or The customer should start by contacting the CE manufacturer directly for assistance and/or
repair information.
In many cases, if the HOST is under warranty, the repair will be done at the customer
s home. Contact Point : Jong Gyu Kim (j
847-941-8828) Vice-President, Zenith R&D center. Jong Hoon Lee ([email protected], 1-847-941-8774) Engineer, Zenith R&
D center.
9. If using a STB will allow the customer to receive services on the damaged DCR device, the installer can leave a box in the c
ustomer
s home until
the customer resolves the issue with the CE manufacturer.
10. If the technician is able to install the CableCARD device and access the User Interface screen (also referred to as MMI scr
een), and has relayed the
information to the dispatcher, but is still not receiving encrypted programming, this programming may be protected throug
h the use of copy
protection directive. Ensure that the information passed to dispatch is correct. Relay again the Host ID, CableCARD ID an
d Data ID (Motorola
only). Dispatch will send a hit to the CableCARD once the information is checked and verified. The CableCARD must be pair
ed to the Host before
copy protected programming can be displayed. Note that it may take several minutes from the time dispatch sends the auth
orization before it
reaches the DCR device. The MMI screens should be checked to verify if the authorization has been received. For SA syst
ems the host-pod
pairing screen should say
Authorization Received.
For Motorola the Conditional Access MMI State parameter should say
Su
bscribed
.
(These should be verified by POD Manufacturers or cable companies.)
11. To confirm the Headend Validation for displaying the encrypted channel, the technician should check the CableCARD menu. For
SA systems, the
CableCARD Copy Protection Information menu should say
Authorization Received
. For Motorola systems, the Conditional Acces
s menu should
say
Valid xx (2 digit)
.
12. If encrypted programming is still not displayed, installer should check the status of followings.
a. Cable Channel List : Ready
b. CableCard : Inserted
c. FDC status (OOB Status) : Lock
d. SNR(Signal to Noise Ratio) : higher than 12 dB is normal range.
Below table describes how to check above status in LG DCR TV.
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BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
AUDIO PATH
Main
Audio Processor
(MSP4450K)
Sub
Audio Processor
(MSP4458G)
PWM Modulator
(NSP2100A)
AMP
(TAS5122)
Front Speaker
AV
AV Switch
(CXA2069)
Front AV
Component 2
Component 1
RGB Audio
Monitor Out
Buffer
(MC33078)
ADC
(CS5331A)
MUX CPLD
(EPM570F256)
NT Tuner
AT/NT Tuner
HD-2
PVR SOC
(LGDT1304P)
SiI
3512
Main
(LGDT3703)
HDD
HDMI
MST3361
System CPLD
(EPM570T144)
CS8415A
SPDIF Out
(Optical)
SPDIF
L/R
L/R
L/R
L/R
SIF
SIF
TP
I2S
I2S
L/R
I2S
TP
I2S
SPDIF
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BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
Check MSP4450K (IC202) Power pins
#12, 13, 65, 66(5V), #39(8V)
Check MSP4450K (IC202) inputs
#19(SCK), #20(LRCK), #22(LRCH)
1
2
3
4
5
6
7
8
9
Check Connector P1611
#10(SCK), #12(LRCK), #LRCH(LRCH)
Check LGDT1102F (IC402)
I2S
outputs
R434(LRCK), R435(SCK), R441(LRCH)
Check MSP4450K (IC202) outputs
#4(SCK), #5(LRCK), #6(LRCH), #74(MCLK)
Check NSP2100A (IC401)
PWM output: R804, R805(LEFT), R802, R803(Right)
PWM mask : R1211(3.3V)
Check TAS5122 (IC403) outputs
IC402: #34, 35, 38, 39(Left), #46, 47, 50, 51(Right)
Check Speaker output wafer
P403(Right), P404(Left)
Check Speaker
Check MSP4450K (IC202) outputs
#33(MNT_R_OUT), #34(MNT_L_OUT)
Check MNT_OUT JACK (J101)
Check LGDT1102F (IC402)
SPDIF
outputs
R436(IEC958_OUT)
Check EPM570T144 (IC301)
COMMON SOUND OUT
Check SPDIF out (R1035)
ANALOG OUT
DIGITAL OUT
MONITOR OUT
- 40 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
TV RF NO SOUND
Main
Audio Processor
(MSP4450K)
PWM Modulator
(NSP2100A)
AMP
(TAS5122)
Front Speaker
Monitor Out
Buffer
(MC33078)
ADC
(CS5331A)
NT Tuner
AT/NT Tuner
HD-2
System CPLD
(EPM570T144)
SPDIF Out
(Optical)
SIF
SIF
I2S
L/R
I2S
I2S
SPDIF
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