SA-WRT5 - Sony Audio Service Manual (repair manual). Page 8

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SA-WRT5
8
2-4.  SUB  MAIN  BOARD,  POWER  CORD (AC1),  SWITCHING  REGULATOR (3L405W) (SWR1)
B
A
B
A
7
 two screws 
 
(BVTP 3 x 8) 
7
 screw
 
(BVTP 3 x 8) 
5
 two screws 
 
(BVTP 3 x 10) 
7
 two screws 
 
(BVTP 3 x 8) 
8
 SUB MAIN board
IC7203
9
 power cord 
 connector 
 (CN1)
qs
 power cord
 (AC1)
qa
 cord bushing 
 (FBS001)
0
 claw
qj
 switching regulator
 (3L405W) 
(SWR1)
1
 Draw two wires 
 
(flat type) out 
 from 
hole.
qg
 screw
 
(BVTP 3 x 8)
qg
 screw
 
(BVTP 3 x 8)
qd
 Remove the wire from 
 
the wiring stopper.
qg
 two screws 
 
(BVTP 3 x 8)
qf
 connector 
 (CN101)
4
 connector 
 (CN7201)
qh
 wiring stopper
– Amp block rear view –
2
 wire (flat type) (26 core) 
 (FFC2) 
(CN7404)
3
 wire (flat type) (9 core) 
 (FFC1) 
(CN7400)
‡ Wire (flat type) setting
‡ Wire setting
switching regulator
(3L405W) (SWR1)
SUB MAIN board
top side
terminal 
side
terminal 
side
wire (flat type) 
(26 core) (FFC2)
wire (flat type) 
(9 core) (FFC1)
‡,QVWDOODWLRQSRVLWLRQRI
  the cord bushing (FBS001)
power cord 
(AC1)
bottom
top
cord bushing 
(FBS001)
claw
35 +0, -2 mm
to switching regulator 
(3L405W) (SWR1)
wiring stopper
CN101
CN7201
SUB MAIN board
6
 heat sink (SZ-SW)
 Note 
3: When installing the heat sink (SZ-SW), 
 
 
spread the compound referring to 
 
 
“NOTE OF REPLACING THE IC7203 
 
 
ON THE SUB MAIN BOARD OR
 
 
THE SUB MAIN BOARD”  on page 4.
Note 4: When installing the power cord 
 
(AC1), check the direction of claw 
 
of cord bushing (FBS001) and 
 install 
correctly.
switching regulator (3L405W)
Note 1: When the complete SUB MAIN board is replaced, refer to “NOTE OF 
REPLACING THE IC7203 ON THE SUB MAIN BOARD OR THE SUB 
MAIN BOARD” on page 4, “NOTES ON THE WIRELESS CONNEC-
TION (LINK) AFTER REPAIRS ARE COMPLETE” and “BOND FIXA-
TION OF ELECTRIC PARTS” on page 5.
Note 2: When the switching regulator (3L405W) (Ref. No. SWR1) is replaced, 
spread the bond referring to “BOND FIXATION OF ELECTRIC PARTS” 
on page 4.
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