| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | SPP1010 | WRONG IC NUMBER AT PICTORIAL DIAGRAM- IC 901 AND IC910 | IC901 and IC910 are wrong per pictorial diagran at printedwiring board handset. | ||
| Sony | SPP1010 | DEFECTIVE KEYPAD - REPLACE IC801 IN HANDSET, P/N 875932467 | Not all keypad buttons on handset will function. Afterverification that handset keyboard is good I checked the rows and columnlines from key board to main board. While checking corresponding caps andresistors connected to each column and row, found R828 | ||
| Sony | SPP1000 | DEAD HANDSET DUE TO DIRTY KEYPAD - CLEAN KEYPAD | Handset was dead. Checked for bad connections, cracks, etc.After a bit of time, decided to clean rubber pad which appeared dusty. | ||
| Sony | SPP1000 | LINE LOCK LIINE LIGHT GOES ON AS SOON AS UNIT POWERS UP | Line relay energizes and line light goes on as soon as unit ispowered up. Base of Q401 was high. | ||
| Sony | SPP1000 | CRACK ON HAND SET MCB | No dial tone, found hair line crack in CN901 area. Itseems stress crack by mounting screw?Sample forwarded. -HQ COMMENTS: I examined the sample and I agree that it was caused bystress from the mounting screw. However it seems to be an isolated casec | ||
| Sony | SPP1000 | NO HANDSHAKE WITH BASE - CLEAN CORROSION ON R511 AND Q601 | Handset and base pass tests but would not lock with eachother. | ||
| Sony | CMH333 | NO POWER - RESOLDER U1 IN LOGIC BOARD | The unit is dead. The unit will turn on if the logic PCB istwisted. I found the MPU IC U1 cold soldered. | ||
| Sony | CMH333 | UNIT KEEPS TURNING ON AND OFF - REPLACE Q2, P/N 8-729-021-54 | Unit keeps turning on and off. Q2 current limiter transistoris shorted between collector and emitter. | ||
| Sony | GVS50 | CAPSTAN RUNS REAL FAST AND LCD IS NOT LIT D/A CONV MA137 | As soon as you turn the power on, capstan will take thespeed if run real fast. | ||
| Sony | GVS50 | NO PICT ON LCD, VID OUT OK/ RESOLDER CN901 | No picture on LCD screen but video out works fine. If tapon main board MA137 get picture intermittently, with ramdomly changingcharacters in OSD running through LCD. | ||
| Sony | TCWR531 | NO POWER - REPLACED IC801 | Unit had no power, no B+ voltage to IC801 pin 24, voltagelost across R808. Unsoldered pin 24 and voltage came up across R808. | ||
| Sony | TAAX380 | INTERMITTENT FUNCTION SWITCHING - RESOLDERED CNP901, CNJ901 | Intermittently would not change functions. | ||
| Sony | TAAV411 | UNIT HAS NO AUDIO - RESOLDERED J501-6 GROUND | No audio output. Audio going into IC502 was OK but had nooutput. IC502 was extremely hot. Found pin 11 of IC502 at -2.1 volts.Traced to IC953 and found center pin (ground) on IC953 at 10 volts. | ||
| Sony | STRGX800 | HUM IN BOTH SPEAKERS, ALL MODES - RESOLDERED C963/965 | Loud hum in both speakers in all modes. Problem caused byC963 and C965 breaking loose from board. These capacitors are theprimary filters for +/-33 volt line to power amplifiers. | ||
| Sony | STRD615 | DEAD - C211 SHORTING AGAINST JW350 | Unit dead, no relay. Found 5v stop line at zero volts.Determined line was shorted on display PCB. |