Sony TA-ZH1ES Service Manual page 33

5. The protection feature is activated ("PROTECTOR" appears)
The protection feature is activated
("PROTECTOR" appears).
Yes
No
There is no foreign matter in the holes of
the jacks.
Yes
No
There is no foreign matter in the main unit.
Yes
The IC (IC351 on the 317 REG board,
No
IC361 on the 7818 REG board, IC372 on
the 7918 REG board) that is screwed to
the chassis is not raised.
Yes
No
The "PROTECTOR" indicator turned off.
Yes
End
6. Cannot update using USB memory
In advance to check the following a point.
• The USB memory that you are using, be replaced with another USB memory.
Cannot update using USB memory.
Yes
The connection cable that connects the
No
connector (CN5602) on the USB A board
and the connector (CN600) on the DIGITAL
board is not removed nor broken.
Yes
No
Cannot update even after connecting the
new USB A board to the DIGITAL board.
Yes
Replace the DIGITAL board to new board.
End
TA-ZH1ES
Remove the foreign matter.
Yes
Remove the foreign matter.
Yes
Fasten not raised to IC351 on the 317 REG
board, IC361 on the 7818 REG board,
IC372 on the 7918 REG board with the
screw.
Yes
Replace the DIGITAL board to new board.
Yes
Re-insert or repair the connection cable.
Yes
Complete to after replacing the USB A
board to new board.
7. Other
The GAIN switch does not work:
• Check if the switch (S4001) on the DISPLAY board is broken.
• Check if there is a problem with the connection cable that con-
nects the connector (CN4002) on the DISPLAY board and the
connector (CN604) on the DIGITAL board.
• Replace the DISPLAY board to new board.
• Check if there is a problem with IC601 on the DIGITAL board.
• Replace the DIGITAL board to new board.
The OLED (display window) is not displayed:
• Check if FPC of the OLED is properly connected into the con-
nector (CN4004) on the DISPLAY board.
• Check if there is a problem with the connection cable that con-
nects the connector (CN4002) on the DISPLAY board and the
connector (CN604) on the DIGITAL board.
• Replace the DISPLAY board to new board.
• Replace the OLED to new part.
• Check if there is a problem with IC601 on the DIGITAL board.
• Replace the DIGITAL board to new board.
The buttons do not work:
• Check if the tactile switches (S4002 to S4008) on the DIS-
PLAY board are broken.
• Check if there is a problem with the connection cable that con-
nects the connector (CN4003) on the DISPLAY board and the
connector (CN603) on the DIGITAL board.
• Replace the DISPLAY board to new board.
• Check if there is a problem with IC601 on the DIGITAL board.
• Replace the DIGITAL board to new board.
The LED does not light up:
• Check if there is a problem with the connection cable that con-
nects the connector (CN5004) on the 3.5 JACK board and the
connector (CN011) on the DIGITAL board.
• Check if there is a problem with the connection cable that con-
nects the connector (CN5003) on the 3.5 JACK board and the
connector (CN4006) on the DISPLAY board.
• Check if there is a problem with the connection cable that con-
nects the connector (CN4002) on the DISPLAY board and the
connector (CN604) on the DIGITAL board.
• Check if there is a problem with the connection cable that con-
nects the connector (CN4003) on the DISPLAY board and the
connector (CN603) on the DIGITAL board.
• Replace the DISPLAY board to new board.
• Check the parts around IC001, IC002 on the DIGITAL board.
• Check if there is a problem with IC601 on the DIGITAL board.
• Replace the DIGITAL board to new board.
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TA-ZH1ES