Integra DTR-7.7 Service Manual page 11

A
SCHEMATIC DIAGRAM-2 (SD-2)
POWER AMP SECTION-1
NOTE
THE COMPONENTS IDENTIFIED BY MARK
1
REPLACE ONLY WITH PART NUMBER SPECIFIED.
VOLTAGE (MEASURED WITH VOLTMETER)
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS (
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
<Note>
SD-x:XY is short for Shcematic Diagram-x and
each socket's location, X=A to H, Y=1 to 5.
NAETC-8680
U05 THERMAL DETECTOR
2
PC BOARD
3
4
5
B
!
ARE CRITICAL FOR SAFETY
IS DC VOLTAGE.(NO INPUT SIGNAL).
) ARE IN uF/WV.
Q6380 LM61CIZ
1
3
G V
JL703A
TO NAAR-8997
SD-7:E1
VOLH
SEC1H
GNDRL
+22V
2SA1162-GR
R6701
2SC2712-GR
22K
Q6703
2SA1163-BL
2SC2712-GR Q6701
Q6702
PROTECT
GNDDG
HPE
HPR
HPL
P6903B
Q6707
1 GND 2SC2712-GR
2
3 S1H+
4
5 S1H-
6
7 S1L+
8
9 S1L-
10
P6904B
NAAF-8678 (2/2)
U04
Q6704
UDZS5.1B
R6902
1K
RL6901
4 1
D10XB60H
3
2
D6901
1
2
3 4
4 1
RL6902
F6901B F6901A
D10XB60H
D6903
2
1
4
3
F6902B F6902A
R6180
R6181
TO NAETC-9001
C
AMPLIFIER PC BOARD
Front L ch
2SC1740S_S
Q6000
+1.1V
-0.6V
1 NFL
2 -BL
3 +BL
4 L+
5 L-
2SC1740S_S
Q6010
R6040
2K
Front R ch
2SC1740S_R
Q6001
+1.1V
-0.6V
1 NFR
2 -BR
3 +BR
4 R+
5 R-
2SC1740S_R
R6041
2K
Q6011
Center ch
2SC1740S_R
Q6002
+1.1V
-0.6V
1 NFC
2 -BC
3 +BC
4 C+
5 C-
2SC1740S_R
R6042
2K
Q6012
P6901A
+B
P6991
+57.2V
1
P6900B
-57.2V
-B
P6902A
1 LSPE
2 RSPE
3 CSPE
4 SLSPE
5 SRSPE
6 SBLSPE
7 SBRSPE
8 RLGND
9 +22V
(1/2W)
390
390 (1/2W) 1 LSP
2 RSP
3 CSP
4 SLSP
5 SRSP
6 SBLSP
SD-7:E2
7 SBRSP
DTR-7.7
D
2.2
(1/4W)
+1.1V
Q6030
R6120
2SC5171
+0.6V
-0.6V
2SA1930
Q6040
-1.0V
2.2
(1/4W)
+1.1V
Q6031
2SC5171
R6121
+0.6V
-0.6V
2SA1930
Q6041
-1.0V
2.2
(1/4W)
+1.1V
Q6032
2SC5171
R6122
+0.6V
-0.6V
2SA1930
Q6042
-1.0V
P6911B