维修案例 |
编号 | 厂商名称 | 产品型号 | 故障现象 | 故障原因 | 位号 | 维修方案 | 备注 | 机芯名称 |
178 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 故障在此路保护电路中。最后查到R8013由3.3Ω变为1K。更换后故障消失。 | R8013 | 更换 | ||
179 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 供电或输出级有短路现象,检查其外围电路发现D8026被击穿。 | D8026 | 更换 | ||
180 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 首先查+B负载,发现Q3002被击穿。更换后,恢复正常。 | Q3002 | 更换 | ||
181 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 考虑到主板与扫描板用了排线连接,有可能松动,将其重插后,机器恢复正常。 | 扫描板用排线 | 重插 | ||
182 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 造成欠压检测电路起控使电源振荡IC8004停振。更换R8009后,恢复正常。 | IC8004 | 更换 | ||
183 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 检测振荡开关IC8004(MB3759)外围电路没发现问题。最后,更换IC8004。 | IC8004 | 更换 | ||
184 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 发现变压器接地电阻R8075由5.6Ω变为几千欧。造成接地不良,使12V电压升高。 | R8075 | 更换 | ||
185 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 测得其负载IC8002比较器的⑧脚,电压为4.3V比正常值14V严重偏低,,更换IC8002故障消失。 | IC8002 | 更换 | ||
186 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 分别检测各放大场效应管正常,最后更换T8005,各级输出电压恢复正常故障消失。 | T8005 | 更换 | ||
187 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 查R1203/R1204有电压,考虑到CPU是带插座的。将CPU重新插一次,插紧,故障排除。 | CPU | 插紧 | ||
189 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 灯丝亮了。可更改BL、(BLACK)检测回路, | BLACK)检测回路 | 更换 | 1 | |
190 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 外接Q8015场效应管的G极。。关机后用电阻档量得Q8015被击穿。 | Q8015 | 更换 | ||
191 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 发现稳压IC7805已烧黑。更换后,+7V电压恢复正常,故障排除。 | IC7805 | 更换 | ||
192 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 断开场IC的第2脚故障消失,测得场IC第2脚对地阻值只有10欧左右,判断场IC坏,更换后故障消失。 | 场IC | 更换 | 1 | |
193 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 只有P8012这路没有输出电压。关机用电阻档测量D8038对地短路。更换D8038后,所有的电压输出正常。故障排除。 | P8012 | 更换 |
维修案例 |
编号 | 厂商名称 | 产品型号 | 故障现象 | 故障原因 | 位号 | 维修方案 | 备注 | 机芯名称 |
194 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 测得视放IC7751(TDA6111Q)各管脚对地都正常,但没有发现有损坏的元件。将其代换一块好 | IC7751 | 更换 | 1 | |
195 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | IC8002正常时2脚电压要比3脚高使误差放大1脚输出低电平。最后查到R8005开路, | R8005 | 更换 | ||
196 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 三无 | 查D8007、C8001没问题,R8013开路。更换后恢复正常。 | R8013 | 更换 | ||
197 | TCL | TRP-4301M | 三无 | 断开D8007后测L8012为300V正常。说明副电源整流电路出现问题。查D8007、C8001没问题,R8013开路。更换后恢复正常。 | R8013 | 更换 | ||
198 | TCL | TRP-4301M | 三无 | 更换CPU后故障依旧。判断外围元件性能不稳定所至。逐一检查复位电路各元件,发现D1601性能不良。更换后故障消失。 | D1601 | 更换 | ||
199 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 会聚供电±5V,发现+5V为0,不正常。顺着线路检查IC3112 5V稳压管虚焊所至。 | IC3112 | 重焊 | ||
200 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 开机将会聚调整后保存,退出会聚状态后会聚乱,说明记忆功能问题,更换N3后, | N3 | 更换 | ||
201 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 开机观察B蓝色会聚严重偏离中心且不能调动,而其余两色可调。查B通道发现N4第48脚虚焊造成BH无输出。 | N3 | 重焊 | ||
202 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 发现烧写会聚专用的排插P1数据线与地之间焊点、碰得较近时而短路造成。将其分开后,故障消失。 | P1 | 重焊 | ||
203 | TCL | RPT4302 | 会聚不良 | 发现IC3108⑥脚波形失真。于是故障确定会聚功放IC与反馈电路,更换功放IC后,未见此现象。 | IC3108 | 更换 | ||
204 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 开机进入彩色中心调整,发现无法进入会聚调试中,疑为主信号板的CPU及记忆IC24C08电路,更换CPU故障依旧,再更换记忆IC故障消失。 | IC24C08 | 更换 | ||
205 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 测3.3V 稳压IC(PQ3RD23)的第②脚无输出而①脚正常,为3.3V 稳压IC坏, | 稳压IC(PQ3RD23 | 更换 | ||
206 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | SAW开关控制转换脚0V不正常,正常为5V,。断开○14脚电压依然为0,说明CPU问题。 | CPU | 更换 | ||
207 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 发现红、绿、蓝+字头无一个可以调动,测R3408和R3401均开路, | R3408 | 更换 | ||
208 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 发现绿+字头无法调致屏幕的中央,发现GH/GV有0.5V(正常无电压),调整会聚盒中的电位器,发现电位器开路. | 电位器 | 更换 |
维修案例 |
编号 | 厂商名称 | 产品型号 | 故障现象 | 故障原因 | 位号 | 维修方案 | 备注 | 机芯名称 |
209 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 仔细跟进其电路走线过程发现RH、RV两路铜皮断裂。接上后恢复正常。 | RH、RV | 重焊 | ||
210 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 测会聚盒的放大器N9第③脚无波形,用万用表测⑦脚到③脚之间的电感L7开路, | L7 | 更换 | ||
211 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 发现只有蓝色+字头不可调动,测接口P3101的①/②脚无波形输出,检查PS3608、PS3607开路坏。 | PS3607 | 更换 | ||
212 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 会聚不良 | 发现红色+字竖线比对应的绿/蓝+字竖线短,测第⑦脚波形异常,查反馈电路R3275坏, | R3275 | 更换 | ||
213 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 散焦 | 查Q3007出电压时,发现Q3007内部击穿, | Q3007 | 更换 | ||
214 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 图像不清晰 | 出现雪花,进入工厂设定模式发现AGC项缺省值太低造成信号衰减太大,将其调到1F值后,恢复正常。 | AGC | 调整 | ||
215 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 图像不同步/图闪 | N制图像正常说明信号处理部分工作正常。更换IC1602后恢复正常 | IC1602 | 更换 | ||
216 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 打火 | 观察发现冷却腔加冷湈口处有液状异物。清理干净开机故障消失。 | IC1602 | 清理 | ||
217 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 散焦 | 发现Q3006B极波形正常。C极没有波形,用万用表电阻档测得CE极有轻微击穿。 | Q3006 | 更换 | ||
218 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 光栅幅度异常 | 测量P3007接口的第③脚HV电压不稳定,于是判断高压分配器坏。 | P3007 | 更换 | ||
219 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 光栅幅度异常 | IC3001断开14脚,依然没输出,疑为IC3001坏,更换IC3001再测14脚波形正常。 | IC3001 | 更换 | ||
220 | TCL | RPT4302 | 图像不同步/图闪 | 发现AV板上Y/C切换IC002③脚有波形,而④脚无输出。测得Q1207 CE极短路 | Q1207 | 更换 | ||
221 | TCL | RPT4302 | 遥控/按键控制失灵 | 档测CPU第(55)脚,有高低电平变化,再观察其电压为2.3V比正常值4.6V低。断开C1203电压恢复正常。 | C1203 | 更换 | 1 | |
222 | TCL | RPT4302 | 字符故障 | 无类似1K振荡波形,考虑到CPU可能与插座接触不良,故重插后,故障排除。 | CPU①、②脚 | 重接 | ||
223 | TCL | RPT4302 | 干扰、振铃 | 测得偏转板上R7215一端有电压,另一端无电压。仔细观察R7215漏焊造成。 | R7215 | 重焊 |
维修案例 |
编号 | 厂商名称 | 产品型号 | 故障现象 | 故障原因 | 位号 | 维修方案 | 备注 | 机芯名称 |
225 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 白光栅/回扫线 | 前面板离加速极太近,通过运输和各种振动就会造成碰加速极, | 加速极 | 调整 | 1 | |
226 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 图像不清晰 | 在维修背投中,有一些是由于反射镜脏造成在开机时画面出现一块块暗影现象。 | 反射镜 | 清理 | ||
227 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 杂音 | 前期用的风扇电机转速振动大所致,现已有新认可的风扇电机可以改善, | 更换 | 清理 | 1 | |
228 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 杂音 | 测IC8005①②脚电压为+6V,说明IC8005已导通。检查外围电路未发现异常,更换IC8005后电路恢复正常,故障消失。 | IC8005 | 更换 | ||
229 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 无图像有声音 | P制图像正常,说明信号处理工作基本正常。可能是系统转换识别出问题。更换记忆块IC1602后,故障消失。 | IC1602 | 更换 | ||
230 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 无台/收台不全 | 搜台后PIP只有一个台,而主画面没台。说明高频部分基本正常。更换IC1202后故障消失。 | IC1202 | 更换 | ||
231 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 打火 | 再拔掉绿枪高压,不再打火。怀疑绿枪偏转短路引起。更换后故障消失。 | 偏转 | 更换 | ||
232 | TCL | HiD432B.r,HiD4326,HiD4329E,HiD5229E,HiD525,HiD522B.r,RPT4301M,PRT4302M,RPT43A6,HiD435B.r,HiD435,HiD436B.r,HiD525B.r,HiD526B.r,HiD4328G,HiD5228G,HiD5226 | 白光栅/回扫线 | 逐一拔掉R、G、B高压线。发现B色正常。进一步测得G、R视放电压200V为0V。最后查到S9764排插假焊造成200伏开路。 | S9764排插 | 重焊 | ||
233 | TCL | AT2911P,HiD299.P,HiD2990P,HiD2990S.E,HiD2966S.E,HiD29192E,HiD29189P,HiD29166P,HiD329S.P,HiD34189P,HiD34728P,HiD25192P,HiD348P,HiD348S.P,HiD346B.E,HiD3460B.E,HiD34276P,HiD34181E,HiD361SW,HiD38215P,HiD29189P,HiD29276P,HiD291S.P,HiD296S.P,HiD296SB.E,HiD299S.P,HiD299P | 彩色不良 | 经检测TDA9143各脚电压发现28脚电压为0V,正常应为4V,为外接滤波电容C226漏电, | C226 | 更换 | ||
234 | TCL | AT2911P,HiD299.P,HiD2990P,HiD2990S.E,HiD2966S.E,HiD29192E,HiD29189P,HiD29166P,HiD329S.P,HiD34189P,HiD34728P,HiD25192P,HiD348P,HiD348S.P,HiD346B.E,HiD3460B.E,HiD34276P,HiD34181E,HiD361SW,HiD38215P,HiD29189P,HiD29276P,HiD291S.P,HiD296S.P,HiD296SB.E,HiD299S.P,HiD299P | 彩色不良 | 检测CPU按键输入脚14、15脚,发现15脚电压4.6V偏低,正常应为5V左右,疑为15脚外接滤波电容C018漏电,经更换后故障消失。 | C018 | 更换 | ||
235 | TCL | AT2911P,HiD299.P,HiD2990P,HiD2990S.E,HiD2966S.E,HiD29192E,HiD29189P,HiD29166P,HiD329S.P,HiD34189P,HiD34728P,HiD25192P,HiD348P,HiD348S.P,HiD346B.E,HiD3460B.E,HiD34276P,HiD34181E,HiD361SW,HiD38215P,HiD29189P,HiD29276P,HiD291S.P,HiD296S.P,HiD296SB.E,HiD299S.P,HiD299P | 杂音 | 因AV与TV伴音都有杂音,在TDA9875的52脚输出波形有杂波干扰,为外接滤波电容C1133漏电, | C1133 | 更换 | ||
236 | TCL | AT2911P,HiD299.P,HiD2990P,HiD2990S.E,HiD2966S.E,HiD29192E,HiD29189P,HiD29166P,HiD329S.P,HiD34189P,HiD34728P,HiD25192P,HiD348P,HiD348S.P,HiD346B.E,HiD3460B.E,HiD34276P,HiD34181E,HiD361SW,HiD38215P,HiD29189P,HiD29276P,HiD291S.P,HiD296S.P,HiD296SB.E,HiD299S.P,HiD299P | 三无 | 检测TDA9332各供电脚发现第7脚数字供电脚电压偏低,为外接滤波电容C1004漏电, | C1004 | 更换 | ||
237 | TCL | AT2911P,HiD299.P,HiD2990P,HiD2990S.E,HiD2966S.E,HiD29192E,HiD29189P,HiD29166P,HiD329S.P,HiD34189P,HiD34728P,HiD25192P,HiD348P,HiD348S.P,HiD346B.E,HiD3460B.E,HiD34276P,HiD34181E,HiD361SW,HiD38215P,HiD29189P,HiD29276P,HiD291S.P,HiD296S.P,HiD296SB.E,HiD299S.P,HiD299P | 图像不同步/图闪 | 将主板跳线J260断开,逐行板插座还短路,更换逐行板插座,故障消失。 | 逐行板插座 | 更换 | ||
238 | TCL | AT2911P,HiD299.P,HiD2990P,HiD2990S.E,HiD2966S.E,HiD29192E,HiD29189P,HiD29166P,HiD329S.P,HiD34189P,HiD34728P,HiD25192P,HiD348P,HiD348S.P,HiD346B.E,HiD3460B.E,HiD34276P,HiD34181E,HiD361SW,HiD38215P,HiD29189P,HiD29276P,HiD291S.P,HiD296S.P,HiD296SB.E,HiD299S.P,HiD299P | 三无 | 测电源开关管时发现Q804三极管击穿,顺路查Q804 B E极外围元件,查D806 3.9V稳压二极管击穿,查B及时发现电阻R805 10Ω内部开路,因B极连接R805至IC801,以IC801也要因电流过大而烧坏, | Q804\R805\D806\IC801 | 更换 | ||
239 | TCL | 2509NI,2938SZ,2938ZNI,2952,2528,2528P,2528S,2528Z,2528SZ,2938Z,2938P,2938S | 三无 | 此机经过雷击后造成三无。更换电脑块和储存块后,无伴音,更换伴音功放块和伴音输出块后一切正常。 | 储存块 | 更换 |
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