NAD T748 - Audio Part Troubleshooting

* T748 AUDIO PART TROUBLESHOOTING
ONON
KOKO
G.NG.N
KOKO
G.NG.N
NO AUDIO OUT
(DIGITAL INPUT)
CHECK AT JK291,
JK292, JK522
REPLACE DIGITAL
JACK or CONNECT
THE DIGITAL CABLE
INTO THE JACK
CHECK AT R2949,
R2953, R2954,
R2955
CHECK OPEN
CIRCUIT or SHORT
CIRCUIT
NO AUDIO OUT
(ANALOG INPUT)
CHECK AT
JK301 ~
JK304, JK501
REPLACE ANALOG
JACK or CONNECT
THE ANALOG CABLE
INTO THE JACK
CHECK AT
IC301 INPUT
PIN
CHECK OPEN
CIRCUIT or SHORT
CIRCUIT
CHECK AT
CHECK OPEN
CIRCUIT or SHORT
CHECK AT
IC301
CHECK IC301
PIN49,50 DATA &
CLK or REPLACE
KOKO
G.NG.N
KOKO
CHECK AT
C2931 ~ C2935
CHECK OPEN
CIRCUIT or SHORT
CIRCUIT
CHECK AT IC299
PIN45, 46, 47, 48,
49
CHECK OPEN
CIRCUIT or SHORT
CIRCUIT
CHECK & REPLAE
IC299
CHECK AT
IC301
OUTPUT PIN
CHECK
IC301
PIN49,50 DATA &
CLK or REPLACE
IC301
CHECK AT
Q3111,
Q3121,
CHECK OPEN
CIRCUIT or SHORT
CIRCUIT
CHECK & REPLACE
CN151 FFC CABLE
2-87