Samsung HT-TZ315, Service Manual

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