Philips S37SD-YD02 - Page 32

Service Modes, Error Codes, and Fault Finding
EN 32 SDI PDP5.
Figure 5-10 Power Supply Check for v2 models
Power Supply Check (v2 versions)
LED8003
Stby is ON?
Green LEDs
8001, 8002
are ON?
Connect set to mains.
Switch ON (with vacation switch)
Check SMPS outputs
Vs, Va, Vset, Ve, Vsc
see Sticker
Ye s
NO
Check CN8004 / 2pin
connector 220V AC
Check F8002
Fuse 250V/8A
ON/OFF relay
RLY8001/8002 acts?
Switch ON via 1 or 2
Check Protection Red
LED8004
Ye s
No
Disconnect VA Logic Buffer
CN8010 / CN8011
Disconnect X-main CN8007
SMPS shuts down?
Red LED8004 is ON.
Protection
Reconnect mains. Switch ON via 1 or 2
Standby supply is defective.
Replace PSU
Ye s
Activate SAM
or SDM
Disconnect mains cord
Disconnect Y-main CN8008
SMPS is working? Disconnect mains cord
No
Disconnect mains
Reconnect mains. Switch ON via 1 or 2
SMPS is
working?
No
Replace
Y-Main board
Replace
X-Main board
SMPS is
working?
No
Replace defective
Logic Buffer board
Ye s
Reconnect mains. Switch ON via 1 or 2
Replace PSU
Ye s
Check Stanby Line pin 11
on CN8002 must be LOW.
Go to repair scenario
as stand-alone
LED on Logic
main board ?
Data communication
from Philips
application to Logic
mains is OK.
Blinking
Continous ON, means no
data communication over
LVDS Cable.
Green LED 8001,
8002
& Red LED are OFF
Ye s
No switch ON of PSU
Switch from standby to on;
1) Via RC when Philips application is in.
2) Via Switch-On-Jig connector when Philips
application is removed
Discharge capacitors on Power supply, before
reconnecting X, Y or Logic Buffer board, use
2K4/10W discharge resistor
Go to repair scenario
as stand-alone
On
Check Power supply
on Logic-Main board.
3.3V and 5V
If Power Supply on Logic
mains is not OK, change PSU
or Logic main board
Off