(No.MB508)1-13
5.1.5 SMPS
5.1.6 Tuner Malfunction (FM/AM)
Standby LED
normal?
Check
P-SENSE
(smCN02
pin 9)
Replace SMPS
Check amp pcb
Set play is
O.K.?
Check
3V,5V,12V
(SMCN02 pin
3,4,5,6 SMCN01
pin 9)
Check
SMIC42,SMIC43
SMIC44 input
(pin No.1)
Replace SMPS
Check AIC01
at amp pcb
Replace
SMIC42,43 or 44
Sound output
O.K.?
Check
SMCN01
pin 1 to 3
SMNC01
pin 1, pin 4
short?
Replace SMPS
Check
display circuit at
amp pcb
Check amp pcb
Check amp pcb
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
Amp pcb t
tuner pack
pin No.4
voltage12V
normal?
Check the Amp PCB SZ105
Check the SMPS PCB SMIC44
Amp pcb
check the by-pass
condenser
EE01L,EE01R
Check the amp pcb ER01R,
ER01L open?
Check the amp pcb EIC1, EIC02
Rreplace tuner pack
Amp pcb
check the
EIC02
pin #1,2
Replace of EIC02
Check the arround
EIC02, ER02R/L
EE10R/L
NO
NO
NO
YES
YES
YES