Checkpoints By Error Mode - Samsung HT-Z210 Service Manual

Troubleshooting
4-1 Checkpoints by Error Mode
4-1-1 Power Failure
The power does not turn on.
UIC1 Main PCB;
pin 14, 40, 55, 89 5V?
Yes
Check for
POWER-SENSE (5V) at Main PCB
: pin 22 of UIC1, 5V?
Yes
When POWER ON
for Front PCB, Check for
HIGH voltage (5V) at
UIC2; pin 13, 43
Yes
A
4-2
No
POWER PCB (SMPS)
C73 (+) CHECK → 5V?
Replace CON3 wire
Check NORMAL
No
VOLTAGE at SMPS PCB
: D51
Check pattern from MCON2
to pin 22 of UIC1
No
Replace the VFD DRIVER IC
(ZIC1).
No
Yes
Check for circuit at SMPS
PCB; ICM01, Fuse (F1), D81,
No
Yes
Check Resistance from GND
to pin 22 of MICOM (UIC1).
If short (0 ohm), Replace
MICOM (UIC1)
T1, T2
Replace D51.
Samsung Electronics