Dicas Reparação
Modelo - Chassis SPP75
Pesquisa: SPP75 Enviar Dica Resolvida
Resultados 22
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | SPP75 | FAILS TX FREQUENCY OFFSET - S/B PUBLISHED | This model does not have a variable capacitor to trimthe crystal oscillator. Consumption of the part seems high. A possibletolerance problem exists. What tolerances should we expect of thispart, both in production and replacement categories? Two rep | ||
| Sony | SPP75 | INADEQUATE CHARGING OF HANDSET BATTERY | Units come in with complaint of short battery life, orincomplete charging. Traced cause to poor connections between solder padson mic board and charging terminals. | ||
| Sony | SPP75 | NO CHARGE - RESOLDER D751. | Unit will not charge. Found that D751 was cold solderedpreventing Handset from transmitting. | ||
| 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 | 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. | ||
| Sony | SPP75 | UNIT WILL NOT DIAL *, 0, OR #, 7, 8, 9 IN TONE | Will not dial *, 0, or # in tone because the trace between pin6 of IC-351 and pin 20 of IC-201 is open (under IC-351). Will not dial 7,8 or 9 in tone because the trace between pin 3 of IC-351 and pin 19 ofIC-201 is open (under IC-351). Open traces appe | ||
| Sony | SPP75 | NO VOLUME CONTROL | Found unit not able to change the volume of the handsetspeaker. Checked pin 3 of IC-701 (Volume Pin) was always low. CheckedR-720 and found it missing. R720 supplies the high for IC-701/pin3. Alsopertains to serial number 1216540. |