Philips FJ3.0E Service Manual page 52

EN 52 5. FJ3.0E LA
37" LCD
Power supply start-up behaviour
SSB Board defective
Standby command linefrom PNX
BLR Procedure
SSB Start-up process
DC/DC converters start up via
Standby processor
Protection?
Blinking LED?
Y
Check if error code is related to
DC/DC converter on SSB
Error code is
from DC/DC ?
Y
Change SSB
BLR procedure
Service Modes, Error Codes, and Fault Finding
Power Supply Check
Mains cord is connected
LED is on?
Red LED is on +5V2 is ok.
Standby supply is working
Switch set on via Local keyboard or RC
Standby line goes
N
low pin 7 1M03
+5V-SW, +12V, & +8V6 becomes available
from platform supply
Check on connector 1M46
Power OK platform
Y
pin 2 1M03 is OK?
Display supply starts-up
Relay on Display supply is closed
LLC supply starts
No
LLC supply
is working?
No
SSB Start-up process Continue
Viper & I2C commands
switching VDisplay voltage to LVDS
connector
In case of short circuit on VDisplay
PS, disconnect LVDS cable
Figure 5-20 First line fault find tree 37" LCD
No
Check if vacation switch is closed
Y
Y
Y
Y
N
Y
Check output voltage.
LCD Inverter start up process
from SSB.........
+5V2 is OK?
Pin 7 1M46
No
Check Standby supply on platform
Check Fuse 1400, on Diplay supply
400VF = 295V on fuse 1P03
Drive circuit, T 7S02
and components in standby supply
No
No start-up of platform supply check
+Vaux from standby supply
Check platform supply
Drive 7P27, Vcc = 15V
Switch on control part 7P12 & 7P26
If protection blinking LED
Check protection error code = xx xx xx
is related to platform supply
Disconnect PS connector To Audio if error code is
Audio protection.
Disonnect PS to Ambilight 1M10 & 1M18.
Try again
Check OVP Latch
+25V Hot and 400V Hot
LLC supply components, control
circuit....
Check PS in standalone mode
(disconnect display supply
connectors)
G_15970_033.eps
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