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7-14. SCHEMATIC DIAGRAM – MAIN Board (2/4) –
(2/4)
A1
A2
A3
A4
A5
(Page 34)
Q504
FN1F4M
MUTING
CONTROL
SWITCH
A6
Q505
FA1A4M
R508
MUTING
15k
CONTROL
SWITCH
A7
A8
C504
1
50V
JW815
R861
R864
1k
1k
Q862
2SC3661
C861
R862
HEADPHONE
47
10k
MUTING
R863
R865
50V
100k
100k
Q861
R814
FN1F4M
1k
MUTING
Q812
2SC3661
CONTROL
HEADPHONE
SWITCH
MUTING
R510
470k
R501
68k
(Page 37)
R921
Q891
47
C892
2SB1116
1W
0.1
JW813
R891
10k
R893
Q891,892
2.2k
FAN MOTOR
DRIVE
Q892
2SC2603
C783
0.1
R819
C813
680
4.7
2W
100V
R869
C863
680
4.7
88
2W
100V
87
R892
R866
4.7k
ZZ1
56
ZZ2
ZZ3
R816
56
35
35
CN891
3P
FAN-
M891
FAN+
(FAN)
CN781
10P
GM(A)-R
GM(A)-GND
GM(A)-L
MIC-AGND
MIC-SIG
A+10V
HP-R
HP-GND
(Page 39)
HP-L
HEADPHONE CONTROL
CN901
13P
SW PROTECT
POWER-GND
POWER-GND
HP-L
HP-R
-B
SP PROTECT IN
FAN DET
FRONT RELAY
(Page 41)
DBFB FEEDBACK
R-IN
A-GND
L-IN
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER (FM/AM)
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
HCD-RG66T
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