Sharp DV-HR480H (serv.man2) Service Manual ▷ View online
17
DV-HR400S/H
DV-HR450S
DV-HR480S/H
P
o
wer On Pr
ocess 3
Cancel power-saving mode
Startup operation start
W
rite FLASH memory IC7507 contents to
SDRAM IC4602, 4603
Initialize each pin in IC7508
Import data from E2PROM
TT
microprocessor IC501 starts to
communicate with IC7508
(4-wire serial communication)
IC7508 starts to communicate with writer
and HDD
Cancel IC4501, IC4004, IC4001, IC3502
reset
Initialize 3DYC IC3502,
Audio DAC
Cancel video mute
Startup operation end
18
DV-HR400S/H
DV-HR450S
DV-HR480S/H
FLO
W CHAR
T No.2
Drive is not working properly (communication failure with IC7508).
Is
A
T
API reset released? (CN4502 pin 1 R4540: RESET_"H" level)
NO
Check IC7508 and peripheral
circuits.
YES
Check following items.
NO
Check power unit and PC_12V
and PC_5V circuits.
Communicating with drive via
A
T
API?
Access drive when CN4501 pin 37 CS0 and pin 38 CS1 are at "L"
level. (Communication is ongoing if intermittently set at LOW
.)
CN4502 pin 35 DA0, pin 33 DA1, pin 36 DA2 and
A
T
API register
address (Intermittently set at LOW).
CN4502 pin 31 INTRQ is at "H" level when drive interrupts. Output
after processing transfer command from IC7508, etc.
CN4502 pin 21 DMARQ is at "L" level when drive requests data
transfer
.
CN4502 pin 29 DMACK is at "L" level when IC7508 receives data
transfer for DMARQ from drive.
When CN4502 pin 25 DIOR and pin 23 DIOW are at "L" level,
IC7508 sends READS/WRITE to drive. (Communication is ongoing
if CS and DA
are intermittently set at LOW
.)
Are 12V and 5V applied to drive?
NO
Check lines between pins of IC7507 and IC7508.
FLO
W CHAR
T No.1
With power on, circuits on main PWB do not work properly
.
Power turns of
f approx. 5 seconds after turned on.
NO
NO
Are voltages of 3.3V (VDD3.3,
A
VDD),2.5V
(VDD2) and 1.5V(VDD1,PVDD) applied to
pins of IC7508?
After power on, is EMMA2_RST
signal ("H"
→
"L" when reset) input to IC7508 pin 283?
YES
Reset
Check
Is Q7512 base (BOOTSEL1) at "L" level and
IC7508 pin 232 at "H" level?
YES
Is serial communication established between
IC7508 and sub unit IC501?
IC7508 pin 286 CSISDIN (SUBMIC_D_OUT)
IC7508 pin 123 FPCSTB (SUBMIC_CS)
IC7508 pin 287 CSISCK (SUBMIC_CLK)
IC7508 pin 122 CSISDOUT
(SUBMIC_D_IN)
YES
NO
NO
NO
NO
Is reset signal ("H"
→
"L" when reset) input to
pins of each IC?
IC3502 pin 84
YCDEC_RST
IC4007 pin 13,14 DV
AD RST
IC4004 pin 1394_RST
IC3009 pin 5 DA_RST
IC3005 pin 13
AD_RST
NO
With power on, is fan running?
Fan is defective or power supply failure.
Check D_3.3V (1) and pc_1.5V (IC7503) lines.
Check IC7508 and peripheral
circuits.
Check line between IC501 pin 98 (MAIN CPU_RST)
→
Q3001,Q3002
→
IC7508
pin 283(EMMA2_RST).
Check BOOTSEL1 (DOWN L
[H]) line between IC501
pin 22 and Q7512 base as well as line between Q7512
collector and IC7508 pin 232.
Check lines between pins of IC7508 and sub PWB
IC501.
IC7508 pin 286
←
IC501 pin 16
TU_D_OUT
IC7508 pin 123
→
IC501 pins 2, 3
TU_CS
IC7508 pin 287
→
IC501 pin 14
TU_CLK
IC7508 pin 122
→
IC501 pin 15 MAIN_DA
T
A
YES
With power on, is data input to IC7508 pins 91,
178,179,258,259,260,261 and 332.
RDA
T
A
[7:0]?
YES
Is 27MHz clock signal input to pins of the
following ICs?
IC7508 pins 79,132,215,216,217 27MHz_OSC
IC4004 pins 50, 202 INVCK4
Check lines between pins of IC7508 and other ICs.
IC7508 pin 32
→
IC3502 pin 84
YCDEC_RST
IC7508 pin 204
→
IC4007 pin 13,14 DV
AD RST
IC7508 pin 205
→
IC4004 pin 1 1394_RST
IC7508 pin 24
→
IC3009 pin 5 DA_RST
IC7508 pin 23
→
IC3005 pin 13
AD_RST
NO
YES
YES
NO
Check X3001 and peripheral
circuits.
Is 27MHz clock signal output to X3001 pin 4?
NO
Check X3502 and peripheral circuits.
Check lines between pins4 of X3001 and other ICs.
X3001 p
in
4
→
IC7508 pins 79,132,215,216,217
27MHz_OSC
X3001
pin 4
→
IC4004 pins 50, 202 INVCK
NO
YES
YES
Is 133MHz clock signal DDR DCK DDRDCKB
input to IC4602,4603 pin 45,46?
Is 24.576MHz clock signal output on IC3502
pin 43?
Check IC7508 and peripheral circuits.
Is 133MHz clock signal output to IC7508 pin 138,
300?
Check lines between IC7508 pin 138,300 and
IC4602,4603 pin 45,46.
NO
YES
Clock
Check
Clock
Check
Is reset signal ("H"
→
"L" when reset) output to each
pin of IC7508?
IC7508 pin 32
YCDEC_RST
IC7508 pin 204 DV
AD RST
IC7508 pin 205 1394_RST
IC7508 pin 24 DA_RST
IC7508 pin 23
AD_RST
NO
19
DV-HR400S/H
DV-HR450S
DV-HR480S/H
FLO
W CHAR
T No.3
HDD is not working properly (communication failure with IC7508).
Is
A
T
API reset released? (CN4502 pin 40 R4566: "H" level)
NO
Check IC7508 and peripheral
circuits.
YES
YES
Check following items.
NO
Check power unit and PC_12V
and PC_5V circuits.
Communicating with drive via
A
T
API?
Access drive when CN4501 pin 4 CS0 and pin 3 CS1 are at "L"
level. (Communication is ongoing if intermittently set at LOW
.)
CN4501 pin 6 DA0, pin 8 DA1, pin 5 DA2 and
A
T
API register
address (intermittently set at LOW).
CN4501 pin 10 INTRQ is at "H" level when drive interrupts. Output
after processing transfer command from IC7508, etc.
CN4501 pin 20 DMARQ is at "L" level when drive requests data
transfer
.
CN4501 pin 12 DMACK is at "L" level when IC7508 receives data
transfer for DMARQ from drive.
When CN4501 pin 16 DIOR and pin 18 DIOW are at "L" level,
IC7508 sends READS/WRITE to drive. (Communication is ongoing
if CS and DA
are intermittently set at LOW
.)
Are 12V and 5V applied to HDD?
YES
Is the EE signal appear?
FLO
W CHAR
T No.4
Recording is impossible
NO
Check Flow Chart No.9 "Image EE does not
appear".
YES
Is video signal output to pins of main unit connector CN3001?
CN3001 pin 25 _Y
CN3001 pin 27 _C
CN3001 pin 24 _V
FLO
W CHAR
T No.6
Playback images do not appear properly (from video/S output).
NO
Refer to Flow chart No.5 "Playback video
signal is not output from main PWB".
YES
Check line from IC2501 pin 21 S-Y_OUT
,
pin 26 S-C_OUT
to terminal (SC2603).
Check IC2501 pin 23
→
IC2601 pin 7 (IN)
and output waveform of IC2601 pin 25.
Is 5V applied to IC2501 pins 1, and 28?
Is IC2501 pin 3 at "H" level?
Check STNDBY_5V line
NO
NO
Is video signal input to each pin of IC2501?
IC2501 pin 6 SD_SY
IC2501 pin 2 SD_SC
IC2501 pin 4 SD_V
YES
Is video signal output to each pin of IC2501?
IC2501 pin 21
Y_OUT
IC2501 pin 26 C_OUT
IC2501 pin 23 V_OUT
Check lines between pins of CN3001 and
IC2501.
CN3001 pin 25
→
CN2202 pin 25
→
IC2501
pin 6 SD_SY
CN3001 pin 27
→
CN2202 pin 27
→
IC2501
pin 2 SD_SC
CN3001 pin 24
→
CN2202 pin 24
→
IC2501
pin 4 SD_V
YES
NO
NO
NO
Is video signal output to each output terminal?
Are
Y
and C signals output to S-OUT
terminal (SC2603)?
Is video signal output to V
ideo-OUT
terminal (J2602)?
Is video/Y
signal output to SCAR
T
L1 terminal?
NO
YES
ICheck or replace
IC2501.
YES
YES
Is T_V_MUTE
line
at "L" level?
NO
Is voltage of 12V supplied to pin 14 of
IC2601 and 5V to pin 24?
Check or replace
IC2601.
YES
Check 12V line and
periphery of IC2691.
5V
→
STNDBY
.
Check 5V line.
NO
Check Q2516.
Check T_V_MUTE
line.
NO
Check input waveform of IC2682 pins 4 and 6 and output of pin 2.
IC2501 pin 21
→
IC2682 pin 4
Y
OUT
IC2682 pin 6
→
IC2601 pin 25
IC2682 pin 2 output. When pin 1 is "H": Pin 4 input signal.
"L": Pin 6 input signal is output.
Is voltage of 5V supplied to IC2682 pin 3?
Check or replace IC2682.
YES
Check STNDBY
5V line.
NO
IC7508 pin 236 (Q7506 B)
Y
(V
A
Y
)
IC7508 pin 235 (Q7505 B) C (V
AC)
IC7508 pin 62 (Q7501 B) G/Y
(V
AG)
IC7508 pin 153 (Q7503 B) B/U (V
AB)
IC7508 pin 61 (Q7502 B) R/V (V
AR)
FLO
W CHAR
T No.5
Playback video signal is not output from main PWB.
Is drive control of IC7508 working properly?
Is HDD control working properly?
Check lines between pins of IC7508 and CN3001 as well as
circuits on lines.
IC7508 pin 236
→
Q7506
→
CN3001 pin 25_Y
IC7508 pin 235
→
Q7505
→
CN3001 pin 27_C
IC7508 pin 62
→
Q7501
→
CN3001 pin 20_G/Y
IC7508 pin 153
→
Q7503
→
CN3001 pin 21_B/U
IC7508 pin 61
→
Q7502
→
CN3001 pin 22_R/V
NO
NO
Refer to Flow chart No.2 "Drive is not working
properly (communication failure with IC7508)"
or Flow chart No.3 "HDD is not working
properly (communication failure with IC7508)".
Check IC7508 and peripheral circuits.
YES
YES
Is video signal output to each pin of IC7508?
Is there no problem with the digital data output from IC7508 to
HDD and DVD writer?
NO
Check Flow Chart No.2 and No.3
20
DV-HR400S/H
DV-HR450S
DV-HR480S/H
Is video signal output to pins of main unit
connector CN3001?
CN3001 pin 20 G/Y
CN3001 pin 21 B/CB
CN3001 pin 22 R/CR
FLO
W CHAR
T No.7
Playback images do not appear properly (from
Y/C
B
/C
R
output).
NO
Refer to Flow chart No.5 "Playback video signal is not output
from main PWB".
YES
YES
NO
Check lines between pins of CN3001 and IC2503.
CN3001 pin 20
→
IC2503 pin 9
CN3001 pin 21
→
IC2503 pin 14
CN3001 pin 22
→
IC2503 pin 1
Is video signal input to each pin of IC2503?
IC2503 pin 9 G/Y
IC2503 pin 14 B/CB
IC2503 pin 1 R/CR
YES
NO
Is 5V applied to IC2503 pin 13?
Is IC2503 pin 12 (DVD (H) line) at "H" level?
Check PC_5V (1) line.
Is video signal output to each pin of IC2503?
IC2503 pin 6 COM_Y
IC2503 pin 5 C
B
IC2503 pin 3 C
R
NO
YES
Check or replace
IC2503.
YES
Check DVD (H) line.
NO
YES
Check line from IC2501 pin 20 to component
Y
terminal (J2601)
and component terminal (J2601).
Check line from IC2501 pin 18 to component CB terminal (J2601)
and component terminal (J2601).
Check line from IC2501 pin 16 to component CR terminal (J2601)
and component terminal (J2601).
NO
NO
NO
Is each video signal output to each output
terminal?
Is
Y
signal output to component terminal
(J2601)?
Is C
B
signal output to component terminal
(J2601)?
Is C
R
signal output to component terminal
(J2601)?
YES
Check Q2512.
Check
T_V_MUTE and RGB CTL
line.
NO
NO
Check line from each pin of IC2503 to each pin of IC2501.
IC2503 pin 6
→
IC2501 pin 10 COM_Y
IC2503 pin 5
→
IC2501 pin 12 C
B
IC2503 pin 3
→
IC2501 pin 14 C
R
Is each video signal input to each pin of
IC2501?
IC2501 pin 10 COM_Y
IC2501 pin 12 C
B
IC2501 pin 14 C
R
YES
NO
Is voltage of 5V supplied to IC2501 pins 1 and 28?
Is IC2501 pin 13 "H" level?
Check STNDBY_5V line.
Is each video signal output to each pin of
IC2501?
IC2501 pin 20 COMPO_Y
IC2501 pin 18 C
B
_OUT
IC2501 pin 16 C
R
_OUT
NO
YES
Check or replace
IC2501.
YES
Is
T_V_MUTE line "L" level?
Is RGB CTL
line "L" level?
NO
Is video signal output to pins of main unit
connector CN3001?
CN3001 pin 20 G/Y
CN3001 pin 21 B/CB
CN3001 pin 22 R/CR
FLO
W CHAR
T No.8
Playback images do not appear properly (from R/G/B output).
NO
Refer to Flow chart No.5 "Playback video signal is not output
from main PWB".
YES
YES
NO
Check lines between pins of CN3001 and IC2503.
CN3001 pin 20
→
IC2503 pin 9
CN3001 pin 21
→
IC2503 pin 14
CN3001 pin 22
→
IC2503 pin 1
Is video signal input to each pin of IC2503?
IC2503 pin 9 G/Y
IC2503 pin 14 B/CB
IC2503 pin 1 R/CR
YES
NO
Is 5V applied to IC2503 pin 13?
Is IC2503 pin 12 (DVD (H) line) at "H" level?
Check PC_5V (1) line.
Is video signal output to each pin of IC2503?
IC2503 pin 6 COM_Y
IC2503 pin 5 C
B
IC2503 pin 3 C
R
NO
YES
Check or replace
IC2503.
YES
Check DVD (H) line.
NO
YES
Check line from IC2502 pin 15 to IC2681 pin 6.
Check IC2681 pin 2 output.
Check line from IC2502 pin 13 to SCAR
T
L1 terminal (SC2601)
and SCAR
T
L1 terminal (SC2601).
Check line from IC2502 pin 10 to SCAR
T
L1 terminal (SC2601)
and SCAR
T
L1 terminal (SC2601).
NO
NO
NO
Is each video signal output to SCAR
T
L1 output
terminal?
Is R OUT
signal output to SCAR
T
L1 output
terminal?
Is G OUT
signal output to SCAR
T
L1 output
terminal?
Is B OUT
signal output to SCAR
T
L1 output
terminal?
YES
Check Q2510.
Check T_V_MUTE
line.
NO
NO
Check line from each pin of IC2503 to each pin of IC2502.
IC2503 pin 6
→
IC2502 pin 4 COM_Y
IC2503 pin 5
→
IC2502 pin 6 CB
IC2503 pin 3
→
IC2502 pin 2 CR
Is each video signal input to each pin of
IC2502?
IC2502 pin 4 COM_Y
IC2502 pin 6 C
B
IC2502 pin 2 C
R
YES
NO
Is voltage of 5V supplied to IC2502 pins 1, 5, 14 and 16?
Is IC2502 pin 3 "H" level?
Check STNDBY_5V line.
Is each video signal output to each pin of
IC2502?
IC2502 pin 15 R_OUT
IC2502 pin 13 G_OUT
IC2502 pin 10 B_OUT
NO
YES
Check or replace
IC2502.
YES
Is
T_V_MUTE line "L" level?
NO
NO
Check S OUT
(H)
line.
Check or replace IC2681.
YES
Is voltage of 5V supplied to IC2681 pin 3?
YES
Check STNDBY
5V line.
NO
Is IC2681 pin 1 "L" level?
YES
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