Dicas Reparação
Modelo - Chassis CDX7540
Pesquisa: CDX7540 Enviar Dica Resolvida
Resultados 16
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | CDX7540 | DOES NOT PLAY DISCS (FOK SIGNAL VOLTAGE ONLY REACHES 1.5V) | The FOK line would only rise to ~ 1.5V. Problem was caused byIC2 (Servo IC) loading it down. | ||
| Sony | CDX7540 | SKIPPING WHEN OUTER TRACKS ARE PLAYED | The customer may complain that skipping occurs when outertracks of discs are played. This may occur if the mechanism sub-chassisis bent, which makes it more difficult to maintain proper focus at theouter portions of discs. | ||
| Sony | CDX7540 | SWITCHES FROM TUNER TO CD AT RANDOM (REPLACE SW80 ON LED BD) | While playing the radio, the unit reverts to CD operation evenif no CD has been inserted. | ||
| Sony | CDX7540 | EJECTS DISC PREMATURELY (UNIT MOUNTED AT 45 DEGREE ANGLE) | This unit is mounted at an approximately 45 degree angle in aconsole on top of the transmission. Intermittently it will eject or nottake a disc. Are there restrictions on the angle of installation? Wouldheat from the transmission cause the unit to eje | ||
| Sony | CDX7540 | SERVICE MANUAL ADJUSTMENT SECTION ERRORS | The adjustment section of the manual has several errors. Onpage 6, shouldn't spindle height be closer to .95mm than .95cm? Also,instructions for entering the service mode are not given. On pages 7 & 8,the diagrams show the scope connected to ground. | ||
| Sony | CDX7540 | RECEIVING INCORRECT PART: L-401 68UH INDUCTOR | When L-401 is ordered, replacement from Kansas City will notfit. Original part is axial type in shape, while replacement is radialtype and will not fit under cross brace of main board. -HQ COMMENTS: The radial type inductor which you received from NPC | ||
| Sony | CDX7540 | UNIT HAS NO AUDIO OUT FOR AM OR FM | Unit has no audio out for AM or FM, has no seek tuning, alsoin FM stereo, indicator is on all the time. | ||
| Sony | CDX7540 | DISPLAY SHOWS UNREADABLE CHARACTERS UPON POWER-UP | When first turned on, display shows unreadable charactersuntil any button is pressed, then display works normally. Noticed thatamp. remote lead was always at 9V, whether the unit was on or off.Found transistor Q-414 partially shorted and physically dama | ||
| Sony | CDX7540 | NO POWER | No power, unit reset ok. | ||
| Sony | CDX7540 | UNIT WILL NOT ACCEPT DISCS | I have seen three units with the PLL frequency of 4.2, 4.27and 4.22mHz. Customer complaint - unit does not accept discs. Problemsdid not show on the bench. All other adjustments RF, EF balance, T-gainand F-gain looked good. | ||
| Sony | CDX7540 | NO AMBER ILLUMINATION | No amber illumination. Open Q-405 switching transistor.Green illumination was ok. | ||
| Sony | CDX7540 | CD STOPS IN THE MIDDLE TRACKS | Many CDX-R77s, CDX-R79s, CDX-7540s and CDX-7580s have CD stuckin MD during 3 to 5 tracks. The problem is when FOP moved to the middleof the guide shaft the FOP's flexible PCB touch Gear (B) Lock (Ref. No.404). Then unit shuts off. | ||
| Sony | CDX7540 | COMPLAINT OF SKIPPING BUT UNIT IS DEAD | Complaint of skipping but unit is dead. Found Q-414 shortedand badly burned on main PC board. This is the fourth unit I have seenlike this. Could this be an installation problem? | ||
| Sony | CDX7540 | UNIT DEVELOPES HIGH PITCHED SQUEAL AND SHUTS DOWN | After playing for a short time, unit would develop ahigh-pitched squeal and shutdown. After replacing optics, unit would notplay unless upside down. | ||
| Sony | CDX7540 | DISPLAY PCB DISLODGED | Display board becomes unseated from plastic clips that holdthe lower edge of the PCB, causing no operation of several buttons on thefront panel. |