Sony XES-M50 (serv.man2) Service Manual ▷ View online
– 10 –
1 three connectors
(CNP103, 105, 205)
4 two screws
(B4
×
14)
5 bracket (TR)
6 four screws
(B3
×
10)
7 four screws
(B3
×
4)
2 two screws
(BV M3
×
12)
3 two spacers
7 four screws
(B3
×
4)
4 two screws
(B4
×
14)
5 bracket (TR)
1 connector
(CNP204)
8 two screws
(B3
×
8)
9 AMP board
AMP BOARD
– 11 –
+
+
+
–
–
SECTION 3
ELECTRICAL ADJUSTMENT
digital
voltmeter
[L-CH AMP BOARD]
[R-CH AMP BOARD]
L-CH
R-CH
VR202
R215
R-CH
L-CH
VR102
R115
IDLING CURRENT ADJUSTMENT
Procedure:
1. Rotate Semi-fixed resistors VR102 and VR202 fully counter-
1. Rotate Semi-fixed resistors VR102 and VR202 fully counter-
clockwise as viewed from the solder side.
2. No signal is entered, as input signal
3. Apply the source voltage 14.4 V between +12 V, REMOTE
3. Apply the source voltage 14.4 V between +12 V, REMOTE
and GND terminals.
4. Adjust the VR102 (L-CH) and VR202 (R-CH) so that the digital
voltmeter reading becomes the adjustment limits below.
Adjustment Limits: 5 ± 0.2 mV
Adjustment Location:
– 12 –
SECTION 4
DIAGRAMS
LED board
R-CH AMP board
JACK (L) board
JACK (R) board
•
Circuit Boards Location
L-CH AMP board
– 17 –
• IC Block Diagram
IC102, 202
µPC494GS
4
1
2
3
5
6
7 8
9
10
16 15
14
13
12 11
ERROR
0.1V
REG.
REF.
OSC
ERROR
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