Read Sharp PZ-50MR2E (serv.man9) Service Manual online
44
PZ-43MR2E
PZ-50MR2E
PZ-50MR2E
TROUBLE SHOOTING TABLE
(Continued)
No sound
No sound from speak
er
NO
YES
YES
Does output icon denote speak
er when
oper
ating audio v
olume control?
NO
NO
Does output icon denote lineout when
oper
ating audio v
o
lume control?
Monitor output in the main men
u is set
to "V
ar
iab
le".
Switch it to "Fix
ed".
YES
Is audio output a
v
ailab
le at each related
pin of IC2501 (MUL
TI SOUND
PR
OCESSOR) nor
mal?
Pins (36) and (37) of IC2501 (SC1 OUT
L/R)
YES
Chec
k Q2505 and 2504 (Buff
e
r) and
its per
ipher
al circuits
YES
Chec
k PC I/F Unit and its per
ipher
al
circuits
.
No audio output (SCAR
T1)
YES
Is audio output a
v
ailab
le at each
related pin of IC2501 (MUL
TI SOUND
PR
OCESSOR) nor
mal?
Pins (27) and (28) of IC2501
(SC1 OUT L/R)
YES
Chec
k the circuit betw
een pins (27) and
(28) of IC2501 and pins (3) and (1) of
SCAR
T1, as w
e
ll as audio m
u
te circuit.
NO
Is tuner audio input a
v
ailab
le at each
related pin of IC2501
(MUL
TI SOUND PR
OCESSOR) nor
mal ?
Pin (67) of IC2501 (SOUND IF1)
Pin (69) of IC2501 (SOUND IF2)
NO
NO
NO
Is audio output a
v
ailab
le at each related pin of
IC1301 (A
V SWITCH) nor
mal?
Pins (52) and (54) of IC1301 (L/R OUT1)
Pins (43) and (45) of IC1301 (L/R OUT2)
Pins (38) and (40) of IC1301 (L/R OUT3)
NO
No audio output (SCAR
T2/3)
YES
Is audio output a
v
ailab
le at each
related pin of IC2501 (MUL
TI SOUND
PR
OCESSOR) nor
mal?
Pins (27) and (28) of IC2501
(SC1 OUT L/R)
YES
Chec
k the circuit betw
een pins (27) and
(28) of IC2501 and pins (3) and (1) of
SCAR
T2/3, as w
e
ll as audio m
u
te circuit.
No monitor audio output
YES
Is nor
mal audio output a
v
ailab
le at
each related pin of IC2501
(MUL
TI SOUND PR
OCESSOR)?
Pins (34) and (33) of IC2501
(SC2 OUT L/R)
YES
Chec
k the circuit betw
een pins (34) and
(33) of IC2501 and J1101 (monitor audio
output), as w
ell as audio m
ute circuit.
Chec
k the plasma displa
y section.
On TV
reception
On e
x
ternal input / PC input
Chec
k IC2501 (MUL
TI SOUND PR
OCESSOR) and its per
ipher
a
l circuits
.
Chec
k B
.P
.F
. of SIF1 and SIF2 respectiv
ely
.
Chec
k
TU1101 (U/V tuner) and per
ipher
als
.
Is each audio input circuit of IC1301 (A
V SWITCH)
nor
mal?
Betw
een SCAR
T1 Pins (6), (2) and IC1301 Pins (2), (4)
Betw
een SCAR
T2 Pins (6), (2) and IC1301 Pins (9), (11)
Betw
een SCAR
T3 Pins (6), (2) and IC1301 Pins (16), (18)
Betw
een front input (J3401) and IC1301 Pins (23), (25)
Betw
een PC input (J3403) and IC1301 Pins (29), (31)
Chec
k
IC1301 (A
V SWITCH) and per
ipher
als
.
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