PDP-R03U
50.
GENERAL INFORM
A
TION
DI
A
GNOSIS
T
R
OUBLE SHO
O
TING
No sound
No sound from speaker
NO
YES
Does output icon denote speaker when
operating audio volume control?
NO
NO
Does output icon denote lineout when
operating audio volume control?
YES
Is audio output available at each
related pin of IC2501
(MULTI SOUND PROCESSOR)
normal ?
IC2501 Pins (36) and (37) (SC1 OUT L/R)
YES
Check Q2505, 2504 (Buffer) and
their peripheral circuits.
YES
Check PC I/F Unit and its peripheral
circuits.
No audio output (INPUT 1/2/3)
YES
Is audio output available at each
related pin of IC2501
(MULTI SOUND PROCESSOR)
normal?
IC2501 Pins (37) and (36)
(SC1 OUT L/R)
YES
Check the circuit between
pins (37)/(36) of IC2501 and
pins (5)/(14) of J1103 (INPUT1),
pins (2)/(11) of J1103 (INPUT2), and
pins (5)/(14) of J1104 (INPUT3),
as well as audio mute circuit.
Check the circuit between
pins (37)/(36) of IC2501 and
pins (10)/(13) of J3401 (INPUT4),
as well as audio mute circuit.
Check the circuit between
pins (34)/(33) of IC2501 and
pins (2)/(11) of J1104 (Monitor audio
output), as well as audio mute circuit.
NO
Is tuner audio input available at each
related pin of IC2501
(MULTI SOUND PROCESSOR) normal?
IC2501 Pin (67) (SOUND S-IF1)
IC2501 Pin (69) (SOUND S-IF2)
NO
NO
Is audio output available at each related pin of
IC1301 (AV SWITCH) normal?
IC1301 Pins (52) and (54)(MAIN L/R)
IC1301 Pins (43) and (45)(SUB L/R)
IC1301 Pins (38) and (40)(MONITOR OUT L/R)
NO
No audio output (INPUT4)
YES
Is audio output available at each
related pin of IC2501
(MULTI SOUND PROCESSOR)
normal?
IC2501 Pins (37) and (36)
(SC1 OUT L/R)
YES
No monitor audio output
YES
Is audio output available at each
related pin of IC2501
(MULTI SOUND PROCESSOR)
normal?
IC2501 Pins (34) and (33)
(SC2 OUT L/R)
YES
Check the plasma display section.
On TV reception
On external input / PC input
Check IC2501 (MULTI SOUND PROCESSOR) and its peripheral circuits.
Check B.P.F. of SIF1 and SIF2 respectively.
Check U/V tuner (TU1101, TU1102) and peripherals.
Is each audio input circuit between J3401 (PC
INPUT/AUDIO) and pins (29)/(31) of IC1301
normal?
Check IC1301 and peripherals.
NO