Pioneer KEH-P7900R EW, Service Manual

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10
KEH-P7900R,P7910R,P7950
1 2 3 4
1 2 3 4
D
C
B
A
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
B
FM/AM TUNER UNIT
A
TUNER AMP UNIT
CN401
IC 101
CA0008AM
IC 453
NJM2068MD
IC 961
S-80734ANDY-I
RESET
IP-BUS DRIVER
RDS
DECODER
VDD
M
M
CN252
CN254
CN255
CN256
CN253
CN251 CN251
EQ AMP
MECHANISM
DRIVER
1
4
3
9
20
19
8
11
6 4 5 1 3
6 4 5 1 3
4
3
9
20
19
8
11
5
6
2
1
S3
70
µ
s
S1
LOAD
S2
MODE
EGN1
REEL
SENSE
M1
MAIN
MOTOR
M2
SUB
MOTOR
REV
L-ch
FWD
L-ch
8 7 10
1
2
5
TAPE+B
VCC
B.U
Lch L1
MUTE
B.U
stby
mtl
LOAD LOADSW
MTLSW
STBY
RIMUTE 17 18
39
36
37
17
19 18
7
5
IC 251
CXA2560Q
IC 351
PA2020A
G
REEL SENSE PCB
F
DECK UNIT
Q101
Q402
X501
Q155
Q501
Q154
Q151 Q153
8
5
1
7
11
ASNB
B–
B+
BL+
BL–
B.U
5
8
11 12
20
24
6
3
1
2
7
8
IPPW
RX
TX
4
18
21
6
NL2
ldet
COMP
L-OUT
IC 501
PM4009A
Q3
CF202
X901
VDD
VCC
LOCL
VDD
VCC
ANTENNA
27
28
1
2
Q201 Q204
Q202
T51 Q51 CF51 CF52 CF53
ANT1 TV ANT2 TV
RF TV
AM RF
EEPROM
IC 3
BR9010FV
MIXER, IF AMP DET
IC 1
PML002A
FM/AM 1ST IF 10.7MHz
AM 2ND IF 450kHz
FM FRONT END
5
6
4
3
35
33
38 42 46
32
44 39
45 55 57 61 74 75
71
65
78
54
70
69
63
25 24
19
46 13 12 11 44 41 34 33
22
IC 2 PM4008A
22 10 14 12 15 16 8 13 2 3
DI/DO CE2 CK CE1 SDBL SL FMSD NL1
CN101
CN452
CN451
Q401
25
EW, EE
B
2 1
B
AL
BU
TEL5V
Q102
Q451
EW, EE
IP-BUS
TEL
MIC