LG 60PB4DT-UB (CHASSIS:PA72A) Service Manual ▷ View online
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BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
Symptom : TV set powers on ( LED :White ) and off ( LED :Red ) repeatedly of itself. ( No video )
Check X1100 (10MHz)
Normal?
Re-download PIC18F1220(IC1103 )
Normal?
YES
NO
Replace PIC18F1220 (IC1103 )
and Re-download
POWER ON-OFF REPETITION(AUTOMATICALLY)
No Video ?
Check CPLD LED and Re-download
YES
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BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
Symptom : When TV set powers on, LED is blinking in seconds. And power off(LED is red)
Fan operate normally?
Replace Fans and recheck
5V MNT(P1604 #6) is 5V HIGH?
Check P1604
AC DETECT(P1604 #1) is 5V HIGH ?
NO
No
NO
NO
Replace power board
Normal?
NO
Replace Power board
Normal?
Check P1603 (power)
Power lines and GND short?
Replace A/V board
or digital board
NO
NO
Check A/V board
Micom
Check A/V board
Micom
YES
YES
Check Fan wafers
and connectors.
Normal?
Check Fans
Fan(P1606), upper/side
( 50
: 1EA, 42
: No FAN )
PROTECT MODE
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BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
CableCARDTM
Troubleshooting Guide
CableCARDTM
CableCARD Definition
1. CableCARD device is A PCMCIA card distributed by cable operators and inserted into a DCR TV(Host) to enable premium services
,
also called "Card" and "Point of Deployment(POD) module". It provides authorization, CA(Conditional Access) decryption and
CP
(Copy Protection) encryption functions for the consumer
’s DCR TV.
Troubleshooting in the Home for CableCARD Installers
2. It is recommended that installers bring along a couple of CableCARDs for troubleshooting. This will help eliminate the Cable
CARD as
a possible problem during the installation.
3. Before installing the CableCARD, installers should check that the Digital Cable Ready (DCR), also referred to as a HOST, is
functional
without a CableCARD.
a. Verify Host (TV) Operation:
The installer can perform this by connecting the RF cable to the correct cable input of the DCR
(there may be connections for a terrestrial antenna) and verifying good picture quality. The DCR will display all non-
encrypted
analog and digital content. (The DCR must not receive RF signal via a STB or accessory RF modulator.) This will elimi
nate
basic TV circuitry as a possible problem.
b. Check that the CableCARD is inserted properly. When inserting cable card push carefully but firmly until you feel the c
ard click
into place.
c. Verify RF from Cable System Tap:
The installer can also connect a cable set top box to confirm reception of encrypted digital
services. This will help eliminate the RF signal as a possible problem.
4. If the first CableCARD installed does not result in a User Interface screen (also referred to as MMI screen) within 5 - 7 mi
nutes, try
unplugging the AC Power cord of the DCR and reconnecting it (to reset the DCR) then try to await coming out of the user Int
erface
screen again. If this is still unsuccessful, try another CableCARD.
a. To eliminate
the possibility of a damaged CableCARD or DCR device
, the technician should look closely at the CableCARD
device to ensure that none of the pinholes are blocked or clogged.
b. Check
Host Interface
. Using a flashlight, the technician should check the CableCARD slot on the DCR TV to ensure that there
are no bent pins.
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BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
Use cursor to select SA
CableCARD
CP Screen option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
CableCARD
Copy protection information
SA
Use cursor to select SA
CableCARD
HOST ID option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
CableCARD
pairing status
SA
Use cursor to select SA
CableCARD
Diag
option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
CableCARD
Diagnostics
SA
Use cursor to select Conditional
Access option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
CA status
NDS
Use cursor to select Network Setup
option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
Network status
NDS
Use cursor to select
CableCARD
Pairing option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
CableCARD
pairing status
NDS
Use cursor to select Conditional
Access option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
CA status
Motorola
Use cursor to select
CableCARD
Status option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
CableCARD
status
Motorola
Use cursor to select Network Setup
option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
Network status
Motorola
Use cursor to select
CableCARD
Pairing option, press ENTER
Use cursor to select CABLE icon then press
ENTER
MENU
CableCARD
pairing status
Motorola
N/A
Use cursor to select CABLE icon then press
ENTER
MENU
CableCARD
main menu
ALL
3rd key
2nd key
1st key
Diagnostic Type
CableCARD
Mfg
CableCARDTM
5. If the second CableCARD is successful, make sure the CSR or Dispatcher knows the new MAC ID and CableCARD ID to complete t
he
installation. The original card should be marked accordingly and returned for repair.
6. Check the CableCARD menu options.
If the second CableCARD fails to bring up the User Interface screen, the technician should refer to the diagnostic menus on
the DCR for
further troubleshooting. The technician can pull up the User Interface screen manually through the menu choices. the custom
er should provide
the User Manual, so the technician can easily navigate through the DCR TV menu screens. Below table describes how to navig
ate the
CableCARD menu. This list of selectable CableCARD options will vary, depending on your cable service provider or CableCARD
manufacturer. Also, below table shows how to access diagnostic screens for the DCR TV. Many of these screens are not desc
ribed in the
User Manual.
7. If installer is still having a problem, the installer should report the problem to the MSO headend dispatcher for troublesho
oting.
If the cable company dispatcher (head end personnel) has completely checked their channel set-up, confirmed the accounting/
billing system to setup is correct, and has confirmed normal channel map with a or more other DCR TVs at the MSO headend,
then go on to the next step.
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