DV-HR300H (serv.man8). Trouble shooting — Sharp DVD Service Manual (repair manual)

Model
DV-HR300H (serv.man8)
Pages
13
Size
84.04 KB
Type
PDF
Document
Service Manual
Brand
Device
DVD / Trouble shooting
File
dv-hr300h-sm8.pdf
Date

View Sharp DV-HR300H (serv.man8) Service Manual online

13
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
6. TROUBLE SHOOTING
FLOW CHART 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 (VDDP3.3, VDDADC3.3, 
VDDP_A3.3) and 1.8V (VDDC1.8) applied to 
pins of IC7506?
After power on, is 154_RS signal ("H" 
 "L" 
when reset) input to IC7506 pin 257?
YES
Reset
Check
Is IC7506 pin 279 BOOTSEL1 at "L" level and 
pin 278 BOOSTSEL0 at "H" level?
YES
With power on, is data input to IC7506 pins 81, 
82, 86, 87, 91-94, 96-98, 101-104 and 108 
(RAMDA
T
 [31:16])?
YES
Is serial communication established between 
IC7506 and sub unit IC501?
IC7506 pin 34 FPCDOUT
 (SUBMIC_D_OUT)
IC7506 pin 36 FPCSTB (SUBMIC_CS)
IC7506 pin 38 FPCCLK (SUBMIC_CLK)
IC7506 pin 39 FPCDIN (SUBMIC_D_IN)
YES
NO
NO
NO
NO
NO
Is reset signal ("H" 
 "L" when reset) input to 
pins of each IC?
IC3502 pin 84 
YCDEC_RST
IC7304 pin 151 ENCRST
IC4005 pin 1 DV_RST
IC3009 pin 5 DACADC_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 1.8V lines (IC7503).
Check IC4501 and peripheral 
circuits.
Check 154_RST
 line between IC501 pin 98 and 
IC7506 pin 257.
Check BOOTSEL1 (DOWN L
 [H]) line between IC501 
pin 22 and IC7506 pin 279 as well as BOOTSEL0 line 
between Q7507 collector and IC7506 pin 278.
Check lines between pins of IC7502 and IC7506.
Check lines between pins of IC7506 and sub PWB 
IC501.
IC7506 pin 34 
 IC501 pin 16 
TU_D_OUT
IC7506 pin 36 
 Q532, 533 
 IC501 pins 2, 3 
TU_CS
IC7506 pin 38 
 Q534, 535 
 IC501 pin 14 
TU_CLK
IC7506 pin 39 
 Q536, 537 
 IC501 pin 15 
                                                              MAIN_DA
T
A
YES
With power on, is data input to IC7506 pins 63, 
64, 66-69, 73 and 74 NVMDA
 [7:0]?
After power on, is reset signal ("H" 
 "L" 
when reset) input to IC4501 pin 54?
IC4501 pin 54 SV_RST
YES
NO
Check lines between pins of IC7509 and IC7506.
Check SV_RST
 line between IC7506 pin 79 and 
IC4501 pin 54.
YES
NO
Is 27MHz clock signal input to pins of the 
following ICs?
IC7506 pins 252, 256 27MHz_OSC
IC7304 pins 28, 34 MPENC_SCLK
IC4005 pins 50, 202 INVCK4
Check lines between pins of IC4501 and other ICs.
IC4501 pin 1
13 
 IC3502 pin 84 
YCDEC_RST
IC4501 pin 139 
 IC7304 pin 151 ENCRST
IC4501 pin 78 
 IC4005 1 pin DV_RST
IC4501 pin 99 
 IC3009 pin 5 DACADC_RST
IC4501 pin 64 
 IC3005 pin 13 
AD_RST
NO
Check IC7506 and peripheral 
circuits.
NO
YES
YES
YES
NO
Check X3001 and peripheral 
circuits.
Check IC3004 and peripheral 
circuits.
Is 27MHz clock signal output to X3001 pin 4?
NO
Check X3502 and peripheral circuits.
Is 27MHz clock signal to each pin of IC3004?
IC3004 pin 14 27MHz_OSC
IC3004 pin 18 MPENC_SCLK
IC3004 pin 16 INVCK4
Check lines between pins of IC3004 and other ICs.
IC3004 pin 14 
 IC7506 pins 252, 256 27MHz_OSC
IC3004 pin 18 
 IC7304 pins 28, 34 MPENC_SCLK
IC3004 pin 16 
 IC4005 pins 50, 202 INVCK4
NO
YES
NO
Check IC7506 and peripheral 
circuits.
NO
YES
YES
YES
YES
Is 27MHz clock signal input to IC4501 pins 18, 
91?
IC4501 pins 18, 91 SBCLK
Is 135MHz clock signal PCLK input to IC7510/
751
1pin 38?
Is 24.576MHz clock signal output on IC3502 
pin 43?
NO
Check IC7506 and peripheral circuits.
Is 135MHz clock signal PCLK output to IC7506 pin 
134?
Check SBCLK (RP_SBCLK) line between IC7506 
pin 208 and IC4501 pins 18, 91.
Check PCLK lines between IC7506 pin 134 and 
IC7510/751
1 pin 38.
NO
YES
Clock
Check
Clock
Check
After power on, is reset signal ("H" 
 "L" when reset) 
output to IC7506 pin 79?
IC7506 pin 79 SV_RST
1
1
Is reset signal ("H" 
 "L" when reset) output to each 
pin of IC4501?
IC4501 pin 1
13 
YCDEC_RST
IC4501 pin 139 ENCRST
IC4501 pin 78 DV_RST
IC4501 pin 99 DACADC_RST
IC4501 pin 64 
AD_RST
NO
Is 27MHz clock signal output to IC7506 pin 208?
IC7506 pin 208 RP_SBCLK
14
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
FLOW CHART No.2
Drive is not working properly (communication failure with IC7506).
Is 
A
T
API reset released? (CN4501 pin 1 R4537: "H" level)
NO
Check IC7506 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 37 CS0 and pin 38 CS1 are at "L" 
level. (Communication is ongoing if intermittently set at LOW
.)
CN4501 pin 35 DA0, pin 33 DA1, pin 36 DA2 and 
A
T
API register 
address (Intermittently set at LOW).
CN4501 pin 31 INTRQ is at "H" level when drive interrupts. Output 
after processing transfer command from IC7506, etc.
CN4501 pin 21 DMARQ is at "L" level when drive requests data 
transfer
.
CN4501 pin 29 DMACK is at "L" level when IC7506 receives data 
transfer for DMARQ from drive.
When CN4501 pin 25 DIOR and pin 23 DIOW are at "L" level, 
IC7506 sends READS/WRITE to drive. (Communication is ongoing 
if CS and DA
 are intermittently set at LOW
.)
Are 12V and 5V applied to drive?
FLOW CHART No.3
HDD is not working properly (communication failure with IC7506).
Is 
A
T
API reset released? (CN4502 pin 40 R4566: "H" level)
NO
Check IC7506 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 CN4502 pin 4 CS0 and pin 3 CS1 are at "L" 
level. (Communication is ongoing if intermittently set at LOW
.)
CN4502 pin 6 DA0, pin 8 DA1, pin 5 DA2 and 
A
T
API register 
address (intermittently set at LOW).
CN4502 pin 10 INTRQ is at "H" level when drive interrupts. Output 
after processing transfer command from IC7506, etc.
CN4502 pin 20 DMARQ is at "L" level when drive requests data 
transfer
.
CN4502 pin 12 DMACK is at "L" level when IC7506 receives data 
transfer for DMARQ from drive.
When CN4502 pin 16 DIOR and pin 18 DIOW are at "L" level, 
IC7506 sends READS/WRITE to drive. (Communication is ongoing 
if CS and DA
 are intermittently set at LOW
.)
Are 12V and 5V applied to HDD?
Is MPEG2_PS data signal properly connected between pins of 
IC7304 and IC4501?
IC7304 pin 66 
 IC4501 pin 138 OSSTB (stream data strobe)
IC7304 pins 56-59, 61, 63-65 
 IC4501 pins 3-7, 10-12 
                                                                 OS [7:0] (stream data)
IC7304 pin 70 
 IC4501 pin 141 OSREQ ("L" level when
                                                    IC4501 requests data transfer
.)
IC7304 pin 68 
 IC4501 pin 13 OSVLD (stream data valid)
IC7304 pin 67 
 IC4501 pin 19 OSSYNC (stream data sync)
FLOW CHART No.4
Recording is impossible (MPEG stream check)
NO
Check IC7304, IC4501 and peripheral 
circuits as well as lines between pins of 
IC7304 and IC4501.
YES
NO
Check IC4501, IC7506 and peripheral 
circuits as well as lines between pins of 
IC4501 and IC7506.
Is MPEG2_PS data signal properly connected between pins of 
IC4501 and IC7506?
IC4501 pin 18 
 IC7506 pin 208 SBCLK (transfer clock 27MHz)
IC4501 pin 23 
 IC7506 pin 240 SBDA
T
 (stream data)
IC4501 pin 22 
 IC7506 pin 234 SBV
ALID ("H" level when
                                                             transferred data is valid)
IC4501 pin 21 
 IC7506 pin 213 SBREQ ("H" level when
                                                   IC7506 requests data transfer)
IC4501 pin 20 
 IC7506 pin 239 SBSOS (sector head signal)
15
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
Y/C/C
B
/C
R
 output
Is video signal output to each pin of IC7506?
IC7506 pin 218 (R7743) 
Y
 OUT
 (Q7506 pin 5 B)
IC7506 pin 214 (R7744) C OUT
 (Q7505 pin 5 B)
IC7506 pin 245 (R7724) C
B
 (B_U) OUT
 (Q7503 B)
IC7506 pin 224 (R7737) C
R
 (R_V) OUT
 (Q7502 B)
FLOW CHART No.5
Playback video signal is not output from main PWB.
Is drive control of IC7506 working properly?
Is HDD control working properly?
YES
Check lines between pins of IC7506 and CN3001 as well as 
circuits on lines.
IC7506 pin 218 (R7743) 
 Q7506 
 Q7509 (FL7501 
 
Q7508 in LP
 mode) 
 IC7512 
→ 
Q7510 
 CN3001 pin 23 154_Y
IC7506 pin 214 pin (R7744) 
 Q7505 
 CN3001 pin 25 154_C
IC7506 pin 245 pin (R7724) 
 Q7503 
 CN3001 pin 19 154_B/U
IC7506 pin 224 pin (R7737) 
 Q7502 
 CN3001 pin 20 154_R/V
NO
NO
Refer to Flow chart No.2 "Drive is not working 
properly (communication failure with IC7506)" 
or Flow chart No.3 "HDD is not working 
properly (communication failure with IC7506)".
Check IC7506 and peripheral circuits.
YES
Y/P
B
/P
R
 output (progressive mode)
Is video signal output to each pin of IC7506?
IC7506 pin 223 (R7738) 
Y
 (G_Y) OUT
 (Q7501 B)
IC7506 pin 245 (R7724) P
B
 (B_U) OUT
 (Q7503 B) 
IC7506 pin 224 (R7737) P
R
 (R_V) OUT
 (Q7502 B)
NO
YES
Check IC7506 and peripheral circuits.
Check lines between pins of IC7506 and CN3001 as well as 
circuits on lines.
IC7506 pin 223 pin (R7738) 
 Q7501 
 CN3001 pin 18 154_G/Y
IC7506 pin 245 pin (R7724) 
 Q7503 
 CN3001 pin 19 154_B/U
IC7506 pin 224 pin (R7737) 
 Q7502 
 CN3001 pin 20 154_R/V
Is video signal output to pins of main unit connector CN3001?
CN3001 pin 23 154_Y
CN3001 pin 25 157_C
FLOW CHART 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".
Check circuits and lines between pins of 
main unit connector CN3001 and input pins 
of IC2802.
CN3001 pin 23 
 S2202 pin 23 
 Q2502, 
2504, 2507 
 IC2802 pin 2 OSD_Y_IN
CN3001 pin 25 
 S2202 pin 25 
 Q2501, 
2503 
 IC2802 pin 4 OSD_C_IN
YES
NO
Check  line from IC2501 pin 21 to S-OUTY
 
terminal (J2601).
Check IC2501 pin 23 
 IC2601 pin 7 (IN) 
and output waveform of IC2601 pin 25.
Is video signal input to each pin of sub unit IC2802?
IC2802 pin 2 OSD_Y_IN
IC2802 pin 4 OSD_C_IN
YES
NO
Is 5V applied to IC2501 pins 1, and 28?
Is 5V applied to IC2802 pin 7?
Is IC2501 pin 3 at "H" level?
STNDBY_5V line
Check PC_5V (1) 
line.
NO
NO
Is video signal output to each pin of IC2802?
IC2802 pin 8 OSD_Y
IC2802 pin 6 OSD_C
YES
Is video signal input to each pin of IC2501?
IC2501 pin 6 OSD_Y
IC2501 pin 2 OSD_C
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 IC2802 and 
IC2501.
IC2802 pin 8 
 IC2501 pin 6 OSD_Y
IC2802 pin 6 
 IC2501 pin 2 OSD_C
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 (JC2601)?
Is video/Y
 signal output to SCAR
T
 L1 terminal?
NO
YES
ICheck or replace 
IC2501.
YES
Check or replace 
IC2802.
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
NO
Check Q2510 and 
R2515.
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
16
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
Is video signal output to pins of main unit 
connector CN3001?
CN3001 pin 23 154_Y
CN3001 pin 19 154_B/U
CN3001 pin 20 154_R/V
FLOW CHART 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
NO
Is video signal input to pins of sub unit IC2802 
and 2801?
IC2802 pin 2 OSD_Y_IN
IC2801 pin 1 OSD_P
B
_IN
IC2801 pin 14 OSD_P
R
_IN
YES
YES
Is 5V applied to IC2802 pin 7?
Is 5V applied to IC2801 pin 13?
Is video signal input to pins of IC2802 and 
2801?
IC2802
pin 8 OSD_Y
IC2801
pin 3
IC2801
pin 5
pin 6
YES
NO
NO
NO
Check lines between pins of IC2802 and 2801 and pins of 
IC2502.
IC2801 pin 8 
 IC2502 pin 8 OSD COM_Y
IC2801 pin 1 
 IC2502 pin 1
1
 OSD_P
B
IC2801 pin 14 
 IC2502 pin 16 OSD_P
R
Is video signal input to each pin of IC2502?
IC2502 pin 8 OSD COM_Y
IC2502 pin 1
1
 OSD_P
B
IC2502 pin 16 OSD_P
R
NO
Check or replace 
IC2801.
YES
YES
Check or replace 
IC2801.
Check PC_5V (1) line.
Check PC_5V (1) line.
NO
Is voltage of 5V supplied to IC2801 pin 13?
Is each video signal output to each pin of 
IC2803?
IC2803
pin 3 OSD P
B
pin 5 OSD P
R
pin 6 OSD COM 
Y
YES
NO
Check or replace 
IC2801.
YES
Check PC_5V (1) line.
NO
Check circuits and lines between pins of main unit connector 
CN3001 and input pins of IC2802/2801.
CN3001 pin 23 
 S2202 pin 23 
 Q2502, 2504, 2507 
 
                                                              IC2802 pin 2 OSD_Y_IN
CN3001 pin 19 
 S2202 pin 19 
 Q2512, 2515 
 
                                                          IC2801 pin 1 OSD_ P
B
 _IN
CN3001 pin 20 
 S2202 pin 20 
 Q2513, 2516 
 
                                                        IC2801 pin 14 OSD_ P
R
 _IN
  
YES
NO
Is 5V applied to IC2502 pin 13?
Is IC2502 pin 12 PROGRE (H) line at "L" level?
STNDBY_5V line.
Is video signal input to each pin of IC2502?
IC2502 pin 6
IC2502 pin 5
IC2502 pin 3
YES
NO
YES
Check or replace 
IC2502.
YES
Check PROGRE (H) line.
NO
NO
Check lines between pins of IC2502 and IC2503.
IC2502 pin 6 
 IC2503 pin 9
IC2502 pin 5 
 IC2503 pin 14
IC2502 pin 3 
 IC2503 pin 1
Is video signal input to each pin of IC2503?
IC2503 pin 9
IC2503 pin 14
IC2503 pin 1
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
1
1
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 Q2522.
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 
 IC2502 pin 12 C
B
IC2503 pin 3 
 IC2502 pin 14 C
R
Is each video signal input to each pin of 
IC2501?
IC2501 pin 10 COM_Y
IC2502 pin 12 C
B
IC2502 pin 14 C
R
YES
NO
Is voltage of 5V supplied to IC2501 pins 1 and 28?
Is IC2501 pin 13 "H" level?
Check PC_5V (1) line.
Is each video signal output to 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
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