Philips BJ3.0E - Fault Finding and Repair Tips

Service Modes, Error Codes, and Fault Finding
EN 40 BJ3.0E PA5.
5.8 Fault Finding and Repair Tips
Read also paragraph "Error Codes" - "Extra Info".
Figure 5-18 First line fault find tree
Power Supply Check
42" BJ3.0 FHP PDP
Power supply start-up behaviour
Mains cord is connected
+5V2 is OK?
Check Stanby supply on platform
Check Fuse 1400, on Diplay supply
400VF = 295V, drive circuit, T 7S02
and components in standby supply
LED is on?
Check if vacation switch is closed
Red LED is on +5V2 is ok.
Standby supply is working
Y
No
No
Switch set on via Local keyboard or RC
+5V-SW, +12V, & +8V6 becomes available
from platform supply
Check on connector 1M46
Y
Y
Relay on Display supply is closed
Preconditioner and LLC supply starts
Power OK platform
pin 2 1M03 is OK?
+400V Preconditioner
is OK?
LLC supply
is working?
Check SW25V-Hot
LLC supply components, control
circuit....
Protection Latch
Check PDP PS as standalone
Check platform supply
Drive 7U10, Vcc = 15V
Switch on control part 7P12 & 7P26
Check 25V-Hot & +3V3 Display on
Display supply (AD1)
Y
Y
Check preconditioner control
circuit. and components (AD3)
No
PDP Start up process
I2C command from VIPER
N
No
Y
SSB Start-up process
DC/DC converters start up via
Standby processor
Standby line goes
low pin 7 1M03
SSB Board defective
Standby command linefrom PNX
BLR Procedure
N
Y
No start-up of platform sypply check
+Vaux from standby supply
If protection blinking LED
Check protection error code = xx xx xx
is related to platform supply
If protection blinking LED.
Check if error code is related to
DC/DC converter on SSB
error code is
from DC/DC ?
Protection?
Blinking LED?
Y
Change SSB
BLR procedure
Y
SSB Start-up process
Continue
Viper & I2C commands
No
No
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