Technics SL-1500C

9
5 Troubleshooting Guide
5.1. No Power
Is
AC power supply cord
damaged?
Is
AC power supply cord
plugged in?
Is the AC power
presented at
AC INLET?
Is the
correct voltage presented
at Pin 5 (+24V) and 3 (GND) of
connector P1730 on SMPS PCB?
Normal : +22.8 to +25.2 V
Is AC INLET
part damaged?
Is Power
Botton operating
normally?
Is fuse F1700
on SMPS PCB
blown?
Pin 5
(+24V)
Pin 3
(GND)
P1730
SMPS PCB
NO
NO
NO
NONO
NO
NO
(No clicking,
Not return back, etc.)
YES
YES
YES
YES
YESYES
YES
No power
Replace SMPS PCB.
Plug the cord in firmly.
Replace OPERATION UNIT
or PANEL PCB.
Replace AC CORD.
Replace AC CORD.
Replace SMPS PCB.
Replace SMPS PCB.Go to next page.
SMPS PCB
AC INLET
F1700