Read Sharp PZ-43MR2E (serv.man9) Service Manual online
43
PZ-43MR2E
PZ-50MR2E
PZ-50MR2E
TROUBLE SHOOTING TABLE
Æ
POWER Unit
P
o
wer
-on failure (Fr
ont LED indicator sta
ys off
.)
NO
YES
Is the po
w
er cab
le
connector proper
ly
connected with the set?
Reinser
t the po
w
er cab
le
connector and tur
n on the
po
w
er again.
NO
YES
Are F701 and F702 intact
in place?
Replace F701 or F702 and
tur
n on the po
w
er again.
If
the fuse b
lo
w
s out again,
replace
V
A701, Q701, Q703
and IC702 and chec
k the
perf
or
mance again.
NO
YES
Does the BA
CK5V line
function?
Chec
k the BA
CK5V line
. Is
there an
y def
ectiv
e par
t or
shor
t-circuit?
Chec
k the set's wire
har
nesses
, FFCs and other
par
ts f
or their connections
.
YES
Repair the def
ectiv
e
par
t or shor
t-circuit.
Chec
k the
perf
or
mance again.
NO
Chec
k IC702,
T702, PC703 and
their per
ipher
al
circuits
.
P
o
wer s
witc
h on,
b
ut no po
wer
(Fr
ont LED indicator does not c
hang
e fr
om red to green,
b
ut remains in red.)
NO
YES
Are the MDR and D
VI cab
le connectors (white
and g
ra
y) proper
ly connected with the PDP
and the set as w
ell?
NO
YES
YES
YES
Is the impedance of the M+10V line
as specified? (Measure the resistance
betw
een F1702 and GND
.)
NO
NO
YES
Are there v
oltage
fluctuations along the O
VP
line (pin (12) of P1502)?
NO
Chec
k the M+10V line as w
ell
as its circuit par
ts
.
YES
Are the DC/DC con
v
e
rter output
lines and MOS-FET (Q1712,
Q1716, Q1726 and Q1718) as
specified?
NO
Chekc the D_PO
W and
B+2.5V_PO
W lines (pins (6)
and (7) of IC1503).
YES
NO
Chec
k the DC/DC con
v
e
rter output
lines and replace the MOS-FET
(Q1712, Q1716, Q1726 and Q1718).
NO
YES
Is the PS_ON ter
minal (pin (1) of CN703) at HI
(3.5V)?
Chec
k the inter
nal par
ts of the po
w
er
unit (Q703, Q704, Q708, Q709, D717,
D710 and D711).
Are the D_PO
W and B+2.5V_PO
W
settings (pins (30), (32), (33) and (34)
of IC1701) at HI?
NO
YES
Do the +5V line (pin (10) of P1703),
+2.5V line (pins (5) and (6) of P1702),
and +3.3V line (pin (8) of P1702) all
function?
Chec
k the set's wire har
nesses
,
FFCs and other par
ts f
or their
connections
.
Replace IC1701.
Chec
k the PS_ON line
.
Is the M+10V line as specified?
Is the PDP's po
w
er s
witch on?
Reinser
t the connectors
, and tur
n on the
po
w
er again.
T
u
rn
on the PDP's po
w
er s
witch.
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
.
45
PZ-43MR2E
PZ-50MR2E
PZ-50MR2E
TROUBLE SHOOTING TABLE
(Continued)
No Picture (1)
YES
NO
YES
No e
xter
nal input <SCAR
T1 A
V
>
Chec
k the line betw
een
pin (20) of SCAR
T1 and
pin (3) of IC1301.
YES
YES
No e
xter
nal input <SCAR
T2 A
V
>
Chec
k the line betw
een
pin (20) of SCAR
T2 and
pin (10) of IC1301.
YES
NO
YES
No e
xter
nal input <SCAR
T3 A
V
>
NO
Chec
k IC1301 and its
per
ipher
al circuits
.
Is there A
V
signal input
at pin (17) of IC1301 (A
V
SWITCH)?
Is there A
V
signal input
at pin (10) of IC1301 (A
V
SWITCH)?
Is there A
V
signal input
at pin (3) of IC1301 (A
V
SWITCH)?
YES
Are there MAIN-R/G/B signal inputs at pins (5), (7)
and (9) of IC811 (30MHz L.P
.F
.), respectiv
ely?
YES
NO
Chec
k IC811 and
its per
ipher
al
circuits
.
YES
YES
YES
NO
Chec
k IC810 and
its per
ipher
al
circuits
.
Are there SUB-R/G/B signal outputs
at pins (13), (11) and (10) of IC810,
respectiv
ely? (in STD mode)
Are there SUB-R/G/B signal outputs
at pins (13), (11) and (10) of IC811,
respectiv
ely? (in HDTV mode)
Chec
k the line betw
een
pin (20) of SCAR
T3 and
pin (17) of IC1301.
YES
NO
Chec
k the line betw
een
IC405 and IC801.
YES
Are there MAIN-Y signal inputs at pins (1) and (44) of IC801
(MAIN
VIDEO CHR
OMA) as w
ell as MAIN-C signal inputs at pins
(43) and (48)(composite signal at pin (1) in SECAM system)?
NO
Chec
k the line betw
een
IC402 and IC802.
Are there SUB-Y signal input at pin (44) of IC802 (SUB
VIDEO CHR
OMA) (at pin (1) in NTSC system) as w
ell as
SUB-C signal input at pin (43) (at pin (48) in NTSC system)?
YES
NO
Chec
k IC801 and its
per
ipher
al circuits
.
YES
Are there MAIN-Y/Cb/Cr signal outputs at pins (21),
(22) and (23) of IC801, respectiv
ely?
NO
Chec
k IC802 and its
per
ipher
al circuits
.
Are there SUB-Y/Cb/Cr signal outputs at pins (21),
(22) and (23) of IC802, respectiv
ely?
YES
NO
Chec
k the line betw
een
IC801 and IC803.
YES
Are there MAIN-Y/Cb/Cr signal inputs at pins (69), (68)
and (67) of IC803 (RGB DECODER), respectiv
ely?
NO
Chec
k the line betw
een
IC802 and IC804.
Are there
SUB-Y/Cb/Cr
signal inputs at pins (5), (9)
and (7) of IC804 (6.7MHz L.P
.F
.), respectiv
ely?
YES
NO
Chec
k IC803 and its
per
ipher
al circuits
.
YES
YES
Are there MAIN-R/G/B signal outputs at pins (35),
(37) and (39) of IC803, respectiv
ely?
NO
Chec
k IC804 and its
per
ipher
al circuits
.
Are there SUB-R/G/B signal outputs at pins (13),
(11) and (10) of IC804, respectiv
ely?
NO
NO
NO
Select INPUT1 A
V
on
the men
u screen.
Select INPUT2 A
V
on
the men
u screen.
NO
Is INPUT3 A
V
selected
on the Input Select
men
u screen?
Is INPUT2 A
V
selected
on the Input Select
men
u screen?
Is INPUT1 A
V
selected
on the Input Select
men
u
screen?
Select INPUT3 A
V
on
the men
u screen.
Are there MAIN and SUB video signal outputs at pins (56) and (44) of IC1301, respectiv
ely?
YES
NO
Chec
k
the lines betw
e
en
IC1301, IC405 and
IC402.
Are there video signal inputs at pins (1) and (2) of IC405 (MAIN COMB FIL
TER) and IC402 (SUB COMB FIL
TER)?
Chec
k the PC I/F unit.
<MAIN system>
<SUB system>
<HDTV mode>
<STD mode>
Are there MAIN-R/G/B signal inputs at pins (5), (7)
and (9) of IC810 (6.7MHz L.P
.F
.), respectiv
ely?
C
A
D
F
B
E
46
PZ-43MR2E
PZ-50MR2E
PZ-50MR2E
TROUBLE SHOOTING TABLE
(Continued)
No picture (2)
NO
YES
NO
YES
No e
xter
nal input picture (SCAR
T2
Y/C)
Is INPUT2
Y/C selected on
Input Select men
u screen?
Select INPUT2
Y/C on
men
u selection screen.
Is
Y signal input a
vailab
le at
pin (10) and C signal input
at pin (12) of IC1301 (A
V
SWITCH) respectiv
ely?
Chec
k the circuit betw
een
pins (20) and (25) of
SCAR
T2 and pins (10) and
(12) of IC1301.
Chec
k the circuit betw
een
pins (20) and (15) of
SCAR
T3 and pins (17) and
(19) of IC1301.
Chec
k
the circuit
betw
een pin (23) of
TUNER and pin (63) of
IC1301.
NO
YES
NO
YES
NO
No e
xter
nal input picture (SCAR
T3
Y/C)
Is INPUT3
Y/C selected on
Input Select men
u screen?
Select INPUT3
Y/C on
men
u selection screen.
Is
Y signal input a
vailab
le at
Pin (17) and C signal input
at pin (19) of IC1301 (A
V
SWITCH), respectiv
ely?
Chec
k IC1301 and
per
ipher
al circuits
.
NO
YES
NO
YES
No TV
picture
Is video output a
vailab
le at pin
(23) of
TU1101 (U/V tuner)?
Chec
k
TUNER and its
per
ipher
a
l circuit.
Is video input signal
a
v
ailab
le at pin (63) of
IC1301 (A
V SWITCH)?
No picture (3)
NO
YES
NO
YES
No e
x
ter
nal input picture (SCAR
T1 RGB)
Is INPUT1 RGB selected
on Input Select men
u
screen?
Select INPUT1 RGB on
men
u selection screen.
Is RGB signal input
a
v
ailab
le at pins (59),
(61) and (63) of IC1401
(A
V SWITCH)?
Chec
k the circuit
betw
een pins (15), (11)
and (7) SCAR
T and pins
(59), (61) and (63).
NO
YES
NO
YES
No e
xter
nal input picture (SCAR
T3 RGB)
Is INPUT3 RGB selected
on Input Select men
u
screen?
Select INPUT3 RGB on
men
u selection screen.
Is RGB signal input
a
v
ailab
le at pins (5), (7)
and (9) of IC1401 (A
V
SWITCH)?
Chec
k the circuit betw
een
pins (15), (11) and (7) of
SCAR
T3 and pins (5), (7)
and (9) of IC1401.
NO
YES
NO
YES
No component picture
Is INPUT3 COMPONENT
selected on Input Select
men
u screen?
Select INPUT3
COMPONENT on men
u
selection screen.
Is component signal input
a
v
ailab
le at pins (15), (17)
and (19) of IC1401 (A
V
SWITCH)?
Chec
k the circuit betw
een
J1101 (component signal
input ter
m
inal) and
IC1401 pins (15), (17)
and (19) of IC1401.
NO
YES
Is RGB signal output
a
v
ailab
le at pins (50), (48)
and (46) of IC1401?
Chec
k IC1401 and
per
ipher
al circuits
.
NO
YES
Is RGB signal output
a
v
ailab
le at pins (50), (48)
and (46) of IC1401?
Chec
k IC1401 and
per
ipher
al circuits
.
NO
YES
YES
YES
YES
Is component signal output
a
v
ailab
le at pins (38), (36)
and (34) of IC1401?
Chec
k
IC1401 and
per
ipher
a
l circuits
.
NO
Is RGB signal input a
vailab
le
at pins (27), (26) and (25) of
IC801 (MAIN
VIDEO
CHR
OMA) respectiv
ely?
Chec
k the circuit betw
een
pins (5), (48) and (46) of
IC1401 and pins (27),
(26) and (25) of IC1801.
NO
Is RGB signal input a
vailab
le
at Pins (27), (26) and (25) of
IC802 (SUB
VIDEO
CHR
OMA) respectiv
ely?
Chec
k the circuit betw
een
pins (50), (48) and (46) of
IC1401 andpins (27), (26)
and (25) of IC802.
NO
Is component signal input
a
v
ailab
le at pins (3), (4)
and (5) of IC803 (RGB
DECODER) respectiv
ely?
Chec
k the circuit betw
e
en
pins (38), (36) and (34) of
IC1401and pins (3), (4)
and (5) of IC803.
C
A
B
Is MAIN-Y signal output a
vailab
le at pin (56) and MAIN-C signal output at pin (58) of IC1301, respectiv
ely?
Is SUB-Y signal output a
vailab
le at pin (44) and SUB-C signal output at pin (47) of IC1301, respectiv
ely?
DE
F