Sony TA-ZH1ES Service Manual page 31

3-4. No sound (or low sound) from LINE IN input
In advance to check the following a point.
• Connected to PS-HX500 (record player) through the EQ amplifi er.
(An RIAA curve correction amplifi er that phono amplifi er or EQ amplifi er etc. is required even for playback of regular records)
No sound (or low sound) from LINE IN
input.
Yes
The condition does not change even after
connecting the new POWER SUPPLY
board to the DIGITAL board.
Yes
The connection cable that connects the
connector (CN5405) on the LPF board and
the connector (CN402) on the DIGITAL
board is not removed nor broken.
Yes
No problems such as broken wires with the
circuits around the jacks (J5101, J5102) on
the LINE IN board.
Yes
No problems with the surroundings of
IC406 on the DIGITAL board.
Yes
Sound is outputted from LINE IN input.
Yes
End
No
Replace the POWER SUPPLY board to
new board.
Re-insert or repair the connection cable.
No
(Twist three times and connect to stabilize
noise properties)
Replace the jacks (J5101, J5102) and
No
surrounding parts on the LINE IN board to
new parts.
No
Replace the parts around IC406 on the
DIGITAL board to new parts.
No
Replace the DIGITAL board to new board.
Yes
Yes
Yes
Yes
Yes
TA-ZH1ES
31