Dicas Reparação
Modelo - Chassis P7
Pesquisa: P7 Enviar Dica Resolvida
Resultados 252
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | CDP701ES | PLL ADJ | In 1986, Kirk Vistain wrote a quicker and much easier way ofsetting PLL freq., but it is not listed in SDIS: #1 Short junction of R142 and C132 to ground. #2 Put unit into test mode, test SW701 to VS. #3 Power on. #4 Adjust L201 for 4.3218Mhz and RV2 | ||
| Sony | CCDSP7 | NOISE IN VIDEO FROM CAMERA/REPLACE C405 | Noisy Video (vertical lines) in Cam mode. Checked signal(luminance) from Cam head section to checked okay, but video board atIC362 signal became noisey. Noise was in AGC circuit checked C405. | ||
| Sony | SPP77 | HANDSET NOT WORKING WITH BASE - REPLACE IC701 (875909946). | Handset wouldn't code up. | ||
| Sony | MDP700 | WON'T PLAY CD'S | Plays LD's O.K. When CD is inserted sled motor travels tothe spindle, but chatters and no rotation on CD. Problem appears to be a defective CD limit SW S902. Replacing SW does not correct problem. | ||
| Sony | SPP75 | RANGE DISTORTION - REPLACE L1, P/N 1-402-571-21 | Distortion is heard when Handset is at minimum of 5 Feet frombase. Checked L1. Coil is opened. | ||
| Sony | SPP75 | LOW MICROPHONE LEVEL ONTO TELEPHONE LINE. | Found unit to have low microphone audio level out thetelephone line. Adjusted RV552 in the handset to increase the mic signalgoing into IC551. | ||
| Sony | SPP75 | DISTORTED AUDIO - ADJUST RV52 IN BASE TO LOWER HANDSET AUDIO | Found dial tone to be real loud in handset. Adjusted RV52 inthe base for more resistance to decrease the dial tone signal onto thehandset. | ||
| Sony | SPP75 | NO TALK- ERROR BEEPS - REPLACE Q-551, P/N 8-729-821-27 | When the talk button was pressed on the handset, the unitwould not scan through the channel LED's but LED 1 and 2 would blink alongwith five error beeps. The handset was not transmitting during the test.I found Q551 open which is the TX switch to supply | ||
| Sony | SPP75 | RINGS, BUT WILL NOT CONNECT-REPLACE RY-301, P/N 1-515-773-11 | I found the unit was able to ring, but it would not grab aline. Q302 was turning on, but the line relay RY-301 would not kick. | ||
| Sony | SPP75 | NO POWER LED - REFLOW R-260 | No power LED. Unit worked fine, but the power LED did notlight. I found R260 cold soldered. | ||
| Sony | CCDSP7 | PLAYBACK VIDEO IS DARK AND NO CHROMA/Q-397, VA-40 | Used block diagram on page 41. Checked signals on IC-360(CXA1200BX video process). IC-360 pin 20 demod out ok. Return to pin 23to low signal level and use schematic. Q-396 was not amplifying. Emitterwas 2.1V (spec 3.4V). Base was 0.565V (spec approxi | ||
| Sony | SPP75 | HANDSET TRANSMIT FREQUENCY HIGH OR LOW - REPLACE X-651 | X-651 is defective preventing the adjustment of the handsettransmit frequency. The TX frequency can be either high or low. I haveseen many of both circumstances. Also applies to serial number 1127339. | ||
| Sony | SPP75 | NO BASE TRANSMIT - DEFECTIVE IC-151 LOADING B+ LINE | Found base unable to transmit. Checked Q-253 collector andfound 1V. Lifted pin 17 of IC-151 (VCC) and checked Q-253 again and foundvoltage to return to 3V. | ||
| Sony | SPP75 | NO HANDSET TRANSMIT - DEFECTIVE IC-651 LOADING B+ LINE | Found handset unable to transmit. Checked voltage at pin 4 ofIC-652 and found 1V. Lifted pin 17 of IC-651 (VCC) and checked pin 4 ofIC-652 again and found voltage to return to 3V. Also applies to serialnumber 1404397. | ||
| Sony | SPP75 | NO HANDSET TRANSMIT | Handset was not putting out any transmit signal. L-553 waspopped through the board and not allowing for oscillation. |