DOWNLOAD Panasonic RQ-SX79GK / RQ-SX79GD Service Manual ↓ Size: 1.21 MB | Pages: 24 in PDF or view online for FREE

Model
RQ-SX79GK RQ-SX79GD
Pages
24
Size
1.21 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / MINI CASSETTE
File
rq-sx79gk-rq-sx79gd.pdf
Date
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Panasonic RQ-SX79GK / RQ-SX79GD Service Manual ▷ View online

VR3-1
50K(A)
VR3-2 50K(A)
(VOL)
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
CONTROL
ASC
DOLBY BLOCK
BST
ASC
AGC
RIPPLE
FILTER
DOLBY BLOCK
Vcc
BIAS
FWD/REV
PRE MUTE
NR
ON/OFF
R1
F1
F2
R2
TP27
C55 0.33
R32 2.2
C56 0.33
R33 2.2
A
B
C47
6.3V10
C52
4V22
R34 3.9K
Q4
B1ADMB000003
POWER SUPPL
C46
0.22
C42
2.5V22
C49
ZF1.0
C51
KB0.1
C50 4V6.8
C37
K680P
C38
K680P
C44
1
C43
1
C45
1
R21
1.8K
TP26
C13
1500P
C21
10V2.2
R22
1.8K
C40
1
J K
K
J
I
H
G
F
E
D
C
B
A
C39 0.47
IC2
AN7501FHQ-EB
PRE/DOLBY/ASC/
POWER AMP
C23
 0.047
R36 470K
R25
   1.5K
R26
   1.5K 
C71 680P
C36
0.056
C57
0.1
1.5V
0.8V
0.8V
0.8V
0.7V
0V
0.7V
0.8V
0.8V
0.8V
0V
0.8V
0.7V
0.8V
0.8V
0.6V
1.5V
0.6V
0V
1.3V
0.8V
1.2V
0V
1.3V
1.5V
0.8V
1V
1V
0.8V
0.7V
0.8V
0.8V
0.8V
1.1V
0.7V
0.8V
0.6V
0.8V
0.8V
0.8V
0.8V
0.8V
0.8V
0.8V
0.6V
0.8V
0V
R62
47K
R12 10K
C22 ZF1.0
R14 220K
EVUTUGB15A54
EVUTUGB15A54
R63  27K
TP32
POWER_ OUT_ Lch
POWER_ OUT_ Rch
POWER MUTE
POWER ON
TP24
TP25
TP21
C10 680P
C8
2.5V22
7                                           8                                         9                                         10                                         11                                      12  
RQ-SX79(GK/GD) CIRCUIT DIAGRAM
A
SCHEMATIC DIAGRAM-2
 + B Voltage Line
 Playback Signal
MAIN CIRCUIT
13
RQ-SX79GK / RQ-SX79GD
IC4
C0EBD0000066
RESET
R37 4.7K
C59 68P
C58 68P
X1
(800kHz)
R29
470K
R28 1M
R27 680
10K
IC6
C0DBAFD00011
REGULATOR
1
2
3
V OUT Vss
V IN
2
1
CONT
Vss
2.2K
47K
9
10
11
12
13
14
15
16
8
7
6
5
4
3
2
1
32
31
30
29
28
27
26
25
17
18
19
20
21
22
23
24
REV
REEL F
TPS
BEEP
XBS OFF
MUTE
BATT.F
REST
CN
Vss
X
OUT
XI
N
Vss
V
DD
VDCE
DISCHARGE
REMOTE
POWER OFF
MOTOR
START
M.CCW
SPEED
P-SOL
FWD/
REV(LO)
T.
PLS-C
P
ARA-L
 O/P
DOLBY
 I/O
BA
TT
.E/
S-XBS
BA
TT
.M/
DOLBY
Q2
UNR521500L
SWITCHING(TPS)
D4
D5
D6
LTSTCSX79
I
H
M
D
R31
470K
C61 0.1
RESET
J
K
L
B
E
Q3
2SD1819ASL
TAPE END DET.
Q1
TAPE END DET.  
D7
MA2S72800L
C67
1
IC3
C2ABDB000073
SYSTEM CONTROL
TP17
Z1
CNB1002002AU
3
4
1
2
L2
100
H
C69 4V22
2.3V
2.3V
2.3V
0V
0V
0.5V
0.2V
1.3V
0.7V
2.3V
1.1V
2.3V
2.3V
1.3V
0V
0V
1.8V
2.3V
2.3V
0.5V
2.3V
2.3V
1V
1V
1.3V
2.1V
0V
2.1V
2.1V
2.1V
0V
2.3V
1.1V 1V
2.3V
1.2V
2.3V
2.3V
2.3V
0.8V
2.4V
P-P
F=800kHz
(FF)
1.8V
P-P
F=800kHz
(FF)
1.5V
UNR511M00L
ELJPA121KF
LTSTCSX79
(BATT.E/S-XBS)
LTSTCSX79
(BATT.M)
(BATT.F)
SET KEY
PARA I/P
BATT I/P
OPEN
FWD
SW3
(MECHANISM DET
.
FWD/STOP/REV)
FWD
STOP
REV
S1
(OPEN
DET
.)
R45 470K
3
VOUT
R47
330K
C54 4V22
TP12
VDD O/P
2.3V
TP11
TP10
TP14
TP15
TP43
TP13
Q6
SOL1
R46
100
SOLENOID DRIVE
1.5V
B1ADMB000003
1.3V
0V
B
C
D
A
F
12                                          13                                      14                                       15                                         16                                    17 
RQ-SX79(GK/GD) CIRCUIT DIAGRAM
R39 0
A
SCHEMATIC DIAGRAM-3
 + B Voltage Line
 Playback Signal
MAIN CIRCUIT
E
R72  100
R73  100
R74  100
0V
0V
14
RQ-SX79GK / RQ-SX79GD
BATTERY CASE
BATTERY
"AA" SIZE
(R6/LR6)1.5V
1
2
4
5
3
R41
15K
R42 68K
R50
1.5K
R43 680K
SW4
 HOLD
SW6
(REW /-)
SW2
SW7
(FF/+)
R52 12K
R53 220K
C63
2.5V150
C66
2.5V150
A
B
OFF C ON
C65
270P
C68 270P
C62
KB0.0027
JK1
HEADPHONES
(
3.5)
R44 47K
SW5
R61 1.5K
R60
1.5K
(PLAY/STOP)
10K
Q9
2.7V
R66
  1M
3
1
VOUT
VIN
Vss
2
3
R65
100K
2.2K
47K
R59 8.2K
R67 82
Q10
Q8
IC7
C0EBC0000034
TP18
TP20
TP19
RECHAREABLE
BATTERY 1.2V
TP2
R48 390K
BATT CHK
RESET
A-B REPEAT/S-XBS
TP3
UNR521300L  SWITCH
UNR511000L
RJJ35TK05-C
B1DFCC000008
    SWITCH
  SWITCH
1.7V
2.7V
1.5V
1.5V
2.7V
B
C
D
A
F
RQ-SX79(GK/GD) CIRCUIT DIAGRAM
A
B
C
D
E
F
G
H
TEST 3.3K
A
SCHEMATIC DIAGRAM-4
 + B Voltage Line
 Playback Signal
MAIN CIRCUIT
Lch
Rch
COM
REM
18
19
20
21
22
23
R68 100K
R69 390K
R57
680
R64 15
Q7
B1ADJB000001
VOLTAGE
COMPARATOR
C70
0.22
R51
768K
R56
680K
1.2V
0V
1.5V
ICP1
R55
768K
R58
680K
E
R77 10K
15
RQ-SX79GK / RQ-SX79GD
11 Printed Circuit Board Diagram
VR2
A
B
C
D
E
F
G
H
RQ-SX79(GK/GD)  MAIN P.C.B.
This circuit board diagram may be modified at any time with 
the development of new technology.
A
MAIN P.C.B.(SIDE:A)
3
1
2
4
5
HEADPHONES
JK1
R22
C45
R21
R2
C50
C40
R26
R5
R6
C36
R63
C38
C12
C1
1
C42
C37
R4
R7
C18
C13
R62
C20
C5
C2
C49
C51
C15
C3
C14
TP34
TP35
TP36
TP37
TP33
RESET
R58
R56
C61
C46
R42
R47
C39
R14
C71
R31
R51
J6
J5
R55
C70
C59
SW7
(FF/+)
SW6
(REW/-)
R53
J4
(
)
SW5
SW2
(A-B REPEAT
     /S-XBS)
C
B E
Q6
R46
R60
R44
C62
R41
C65
R52
R57
R50
R74
R72
R77
R73
D4
(BATT.E/S-XBS)
D6
(BATT.F)
D5
(BATT.M/DOLBY)
MOTOR
V
U
W
VCC
RECHARGEABLE
BA
TTER
Y
 1.2V
    SOL1
(SOLENOID)
TP20
TP19
TP18
TP17
VR1
16
RQ-SX79GK / RQ-SX79GD
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