Trouble Shooting; Oled Dose Not Light - Denon DRA-100 Service Manual

TROUBLE SHOOTING

1. OLED dose not light

Check Power Supply Voltages for SMPS.
Check the following voltages when the unit is connected to the
AC power supply.
SMPS PCB
[CN222] 7pin / +18V
[CN222] 10pin or 11pin / +5.25V
If these voltages are not output, a fault may have occurred in the
SMPS PCB.
Check Power Supply Voltages for System μ-com.
MAIN PCB
3V3_STBY [IC1008] 5pin
Check Reset signal for system μ-com.
MAIN PCB
[IC1210] 19pin / RESET : Normal "Hi"
Check the Clock for system μ-com.
MAIN PCB
[IC1210] 22pin / XTAL : Normal "12MHz"
Check Power Supply Voltages for OLED.
FRONT PCB
[FPC102] 1pin / +16V_OLED
[FPC102] 4,6,14,26pin / 3V3_OLED
Check Drive Signals for OLED.
FRONT PCB
[FPC102] 11, 12, 13, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 pin
(EL_RESET, EL_CS, EL_DC, EL_RW, EL_RD, D0-D7)
OK
OK
OK
OK
OK
OK
END
NG
Replace the SMPS PCB.
NG
Check the soldering or replace the device.
MAIN PCB
[IC1008]
NG
Check the soldering or replace the device.
MAIN PCB
[IC1202]
NG
Check the soldering or replace the device.
MAIN PCB
[X1201]
Check the soldering or replace the device.
NG
FRONT / MAIN PCB
[Q111], [Q110]
[IC1201] 50pin / CTR_16V_OLED : Normal "Hi" ➡ [Q109]
[Q107]
[IC1201] 56pin / CTR_3V3_OLED : Normal "Hi" ➡ [Q108]
NG Check the soldering or replace the device.
MAIN PCB
[IC1201] 25, 29, 27, 28, 26, 37 - 30 pin
30