#4 Not Often
#3 Occasionally
#2
#1 Suspect
A
SC
An increase or reduction of the Energy Recovery
Circuit output (MID).
Shorted SUB5V.
SC Energy Recovery
Circuit
6 BLINKS
A
Failure of IC9300.
Discharge Control Circuit
DDC (IC9300)
9 BLINKS
A
SS
Abnormality of the sustain drive circuit.
Open or loose connection between the SS/SS2 Boards
and FPCs from the panel (SS52 – SS54 – SS55 – SS57).
Open or loose connection between connectors of A and C
boards.
Open or loose connection between SC and A boards
(SC20(SN20)/A20).
Sustain Drive Circuit and
Connection between the
SS board and the Panel.
8 BLINKS
A/Panel
SS
SC
SU/SD
Missing or shorted Vsus.
Abnormality of the scan circuit output, the 15V_F,
the scn_pro, and Vscn circuit.
Loose or open Connection between the SC board and
the SU/SD board (SC41, SC42, SC46).
Open or loose connection between connectors SC2/P2
Defective panel.
Scan Drive Circuit and
Connection between the
SC board and the SU/SD
board.
7 BLINKS
A
Defective A board.
IC8000 Internal
Communication
13 BLINKS
Speakers/
Subwoofer
A
Defective Speaker/Subwoofer.
Pinched Speaker Wire.
Audio Amp. Circuit
12 BLINKS
A
P
SS
SC
Over Voltage Condition of SUB5V or SUB3.3V.
Low voltage of SUB3.3V (Result of P15V shorted)
SUB3.3V_Sense (OVP)
10 BLINKS
A
P
Missing P15V.
P15V from the P board
2 BLINKS
A
Read error.
Wake up error of IC9300.
Panel Information SOS
Communication problem.
1 BLINK
LIST OF BOARDS POSSIBLY CASUSING THE FAILURE
CONDITIONS TRIGGERING
THE SHUTDOWN
CIRCUIT
MONITORED
POWER LED
ERROR CODE
Power LED Error Code Definition (TC-P**ST60)
Slide 8
