Sharp DV-HR300U Manuel de service télécharger pdf (Page 15)

DV-HR300U

6. TROUBLE SHOOTING

FLOW CHART No.1

With power on, circuits on main PWB do not work properly.

Power turns off approx. 5 seconds after turned on.

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

(RAMDAT [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

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

With power on, is fan running?

Fan is defective or power supply failure.

Check D_3.3V (1) and 1.8V lines (IC7506).

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 257 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_DATA

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

Check lines between pins of IC7509 and IC7506.

Check SV_RST line between IC7506 pin 29 and

IC4501 pin 54.

YES

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 113 → 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

Check IC7506 and peripheral

circuits.

YES

Check X3001 and peripheral

circuits.

Check IC3004 and peripheral

circuits.

Is 27MHz clock signal output to X3001 pin 4?

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

YES

Check IC7506 and peripheral

circuits.

YES

Is 27MHz clock signal input to IC4501 pins 18,

91?

IC4501 pins 18, 91 SBCLK

Is 135MHz clock signal PCLK input to IC7510/

7511pin 38?

Is 24.576MHz clock signal output on IC3502

pin 43?

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 lines between IC7506 pin 134 and IC7510/

7511 pin 38.

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

Is reset signal ("H" → "L" when reset) output to each

pin of IC4501?

IC4501 pin 113 YCDEC_RST

IC4501 pin 139 ENCRST

IC4501 pin 78 DV_RST

IC4501 pin 99 DACADC_RST

IC4501 pin 64 AD_RST

Is 27MHz clock signal output to IC7506 pin 208?

IC7506 pin 208 RP_SBCLK

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 75 76

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Sharp DV-HR300U Manuel de service Page 15

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