Read Sony STR-KM22 / STR-KM55 / STR-KM77 Service Manual online
STR-KM22/KM55/KM77
5
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, the electrical discharge is necessary for
the electric shock prevention.
Connect the resistor to both ends of respective capacitors.
When checking the board, the electrical discharge is necessary for
the electric shock prevention.
Connect the resistor to both ends of respective capacitors.
• Main
Board
C930,
C931
• Sub
Rectifi er Board
C943, C944 (STR-KM55/KM77 only)
– MAIN BOARD (Conductor Side) –
(To both ends of each capacitor)
800
:/2 W
C943
C931 C930
C944
– RECTIFIER BOARD (Conductor Side) –
NOTE OF REPLACING MAIN BOARD
When Main board are replaced, please perform below procedure:
When Main board are replaced, please perform below procedure:
1. While pressing the [SPEAKER SETTING] and [GAME] but-
tons, Press the [
?/1
] button to turn on the main power.
If the setting is not fi xed with its model or destination or both
(model+destination), the message below will appears.
(model+destination), the message below will appears.
Items
Display
MODEL + AREA NOT
FIX
FIX
M D. D
S
T.
U
N
F
I
X
MODEL NOT FIX
M
O
D
E
L.
U
N
F
I
X
AREA/DESTINATION
NOT FIX
NOT FIX
D
E
S
T.
U
N
F
I
X
If the model and area already been fi xed, below two steps will
perform.
perform.
2. The message “MV2 **” appears. This is main microprocessor
version (KM22).
The message “MV5 **” appears. This is main microprocessor
version (KM55).
version (KM55).
The message “MV7 **” appears. This is main microprocessor
version (KM77).
version (KM77).
3. Each time the [DISPLAY] button is pressed, “SYS.
vx.xxx”,“MAIN vx.xx”, “VIDEO vx.xx”, “SFLASH vx.xx”,
“STUNE vx.xx”, BTM vx.xx and BTL vx.xx appear in this
order, and returns to the “MV** xxx” display.
“STUNE vx.xx”, BTM vx.xx and BTL vx.xx appear in this
order, and returns to the “MV** xxx” display.
**: destination, x.xxx: software version
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