Sharp AQUOS LC-19D45U, Service Manual, Page: 46 / 126

46
LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U
TROUBLESHOOTING TABLE (Continued)
No audio output during UHF/VHF reception
Yes
No
No
Yes
No
Yes
Yes
No
Yes
Check IC501/IC502 and peripheral circuits.
Check circuits between IC1101 and IC501/IC502.
Check the filter circuits (Q1102, Q1103) and
peripheral circuits.
Check the tuner and peripheral circuits.
Is SIF output from the tuner (TU1101_Pin15) normal?
Is input signal fed to pin21 of IC1101?
Are audio signals from pins 30 and 29 of IC1101 to pins
13 of IC501 and IC502 normal?
Check the connector (P301) of MAIN_UNIT and around the
speakers.
Are audio outputs of pin 3 of IC501 and IC502 normal?
Are I2S signals output from pin 2,pin 4,pin 7 and pin 8 of
IC302 to pin W5,pin W6, pin Y6 and pin AA6 of IC801 normal?
No
Yes
Check the circuits between IC501/502 and IC302.
Are audio input of pin 10 and pin 12 of IC302 normal?
Yes
No
Check IC1302 and peripheral circuits.
Is audio output from IC1302 normal?
No
Check the circuits between IC302 and IC801.
No
Yes
Check IC801 and peripheral circuits.
Are audio signal output from pin AA3 and pin AA4 of
IC801 to pin 5 and pin 9 of IC1302 normal?