Pioneer DV-353-K Service Manual - Page 68

Trouble Shooting

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7.1.4 TROUBLE SHOOTING At first confirm error history. (Refer to "7.1.2 DISPLAY OF THE MECHANISM ERROR HISTORY") When a history was not displayed, refer to this list. No. Symptoms 1 Cannot power on Diagnosis contents Check each voltage of POWER SUPPLY UNIT (E+4V, -28V and FLDC output) Defectiveness assumption points POWER SUPPLY UNIT Are not there short-circuit and open-circuit between output connector of POWER SUPPLY UNIT and CN401 of FJMB? Connector / wire rod Check that voltage of IC451-pin 4 is 3.3V. 3.3V regulator FJMB IC11-22pin: 0V, is it 3.3V when I pushed a POWER key when I do tact-switcies (in case of only a key not push it? of a product, NG) Does FJMB IC11-pin 17 (SEL IR) receive a message of a signal between 0V - 3.3V when I pushed a wireless remote controller key? Wireless remote controller receiver light part (in case of only a key of a wireless remote controller, NG) 2 An opening screen is not Are IC11-pin 12 (XRESET) and IC11-pin 11 (POWER ON) "H" level displayed by a monitor together? FL control u-com (IC11) (FL turns on. A mecha does not work.) • • Check each voltage of POWER SUPPLY UNIT(E+6V and SW+3.3V) As for P-CONT of POWER SUPPLY UNITY, are there around 3V? POWER SUPPLY UNIT IC441-3pin: 3.5V, IC431-pin 3: 2.5V, IC303-pin 3: 1.8V Are these each output? Each regulator Is there number of vibrations in a standard whether crystal resonator does oscillation? Crystal resonator (27MHz, 20MHz) Refer to contents of a FE error displayed by FL display. (SRAM defectiveness, I2C communication line defectiveness, other) • Is a signal input into IC603-pin 26 (CE3) just after power on? [L ↔ H] → Communication with flash ROM • Is a signal input into IC604 pin-16 (SMIWE), 19pin (SMICS0), 38pin (SMICLK)? [L ↔ H] → Communication with SDRAM L6315 (FRONT END IC: IC301) STI5519 (BACK END IC: IC601) Is a signal output by IC603-pin 28 (CPU _ OE) just after power on? [L ↔ H] Flash ROM (IC603) Is a signal input into IC11-pin 16 (FP _ ACK)? [L ↔ H] → Communication with FL control u-com STI5519 (BACK END IC: IC601) Is a signal output by IC11-pin 10 (XRDY)? (around 0-3V, L ↔ H) FL control u-com (IC11) Is a signal output by IC11-pin 9, 8, 7? (around 0-3V) FL control u-com -BACK END communication line 3 An opening screen is not displayed by a monitor (FL turns on. A mecha Check BACK END IC and video signal path between video-out (cf. block diagram) The video circuit after BACK END works.) 4 Cannot open a tray (An opening screen is displayed by a monitor) Does voltage of CN52-pin 3, 5 change normally? pin 3 (XCLOSE): It is "H" level by the state that has finished doing CLOSE. pin 5 (OPEN): It is "H" level by the state that has finished doing OPEN. Tray-SW Does LOAD_DRV signal come? STI5519 (BACK END IC: IC601) Is a signal output by IC351-pin 14, 15 (CN52-1, 2pin)? (pin 15: It is about 6V during tray opening, It is about 0V during tray closing) (pin 14: It is about 0V during tray opening, It is about 6V during tray closing) FTS Driver IC (IC351) Are not there wire rod coming out, damage in CN3, CN52? Connector / wire rod When the voltage of a CN251-pin 1 overwhelmed an inside switch, does it change? Inside switch 68 DV-353-K

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68
DV-353-K
7.1.4 TROUBLE SHOOTING
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I
At first confirm error history. (Refer to "7.1.2 DISPLAY OF THE MECHANISM ERROR HISTORY")
When a history was not displayed, refer to this list.