Aiwa HS-PX797 User manual

SERVICE MANUAL
HS-PX797 AK, AE
STEREO CASSETTE PLAYER BASIC TAPE MECHANISM : 6ZM-2 P11NF
S/M Code No. 09-998-415-5R1
REVISION
 Design and specifications are subject to change without
notice.
Maximum output: 4 mW + 4 mW (EIAJ/16W)
Load impedance: 16  32 ohms
Power sources: DC 1.2 V using supplied rechargeable battery NB-5G,
DC 1.5 V using an R6 (AA) dry cell battery,
AC house current using the optional AC adaptor
Maximum dimensions: 80.1 (W) x 110.2 (H) x 24.1 (D) mm (31/4 x 43/8 x 31/32in.)
Weight Approx. 164 g, (5.7 oz) (including the rechargeable battery,
excluding the battery case)
 Dolby noise reduction manufactured under license from Dolby
Laboratories Licensing Corporation.
DOLBY and the double-D symbol are trademarks of Dolby
Laboratories Licensing Corporation.
SPECIFICATIONS

DESCRIPTIONREF. NO. KANRI
NO.
PART NO. KANRI
NO.
REF. NO. DESCRIPTIONPART NO.
ELECTRICAL MAIN PARTS LIST
IC
87-A21-179-040 C-IC,TA2123AF
87-A20-818-040 C-IC,NJM2185AV
87-A20-961-040 C-IC,MM1279XV
87-A21-277-010 C-IC,ML63512-122
87-A20-861-040 C-IC,S-80808ANNP
TRANSISTOR
89-111-624-080 TR,2SA1162Y
87-026-417-080 TR,RN1310
87-026-480-080 C-TR,RN4605
89-333-266-080 CHIP TR,2SC3326B
89-113-625-080 TR,2SA1362GR
89-341-165-080 C-TR,2SC4116GR
87-026-423-080 C-TR RN2305
DIODE
87-A40-666-040 C-DIODE,HN2S01F
87-A40-676-040 C-ZENER,UDZ11B
MAIN C.B
C101 87-012-273-080 C-CAP,U 820P-50 B
C102 87-012-273-080 C-CAP,U 820P-50 B
C103 87-012-273-080 C-CAP,U 820P-50 B
C104 87-012-273-080 C-CAP,U 820P-50 B
C105 87-016-114-080 C-CAP,U0.01-25B
C106 87-016-114-080 C-CAP,U0.01-25B
C107 87-A11-188-080 C-CAP,TN 22-4 AM004R
C108 87-A11-188-080 C-CAP,TN 22-4 AM004R
C109 87-A11-188-080 C-CAP,TN 22-4 AM004R
C110 87-A10-025-080 C-CAP,U 0.22-16Z F
C111 87-012-278-080 C-CAP,U 2200P-50 KB
C112 87-A10-263-080 C-CAP,U 0.1-16ZF
C113 87-A11-188-080 C-CAP,TN 22-4 AM004R
C115 87-A10-707-080 C-CAP,U 0.47U-16 F Z
C116 87-A10-707-080 C-CAP,U 0.47U-16 F Z
C117 87-A10-707-080 C-CAP,U 0.47U-16 F Z
C118 87-016-562-080 C-CAP,TN 4.7-10 SV A
C119 87-A11-797-080 C-CAP,S 2.2-16 Z F
C120 87-A10-263-080 C-CAP,U 0.1-16ZF
C123 87-A10-263-080 C-CAP,U 0.1-16ZF
C124 87-A10-263-080 C-CAP,U 0.1-16ZF
C125 87-A10-706-080 C-CAP,U 0.33-16Z F
C126 87-A10-707-080 C-CAP,U 0.47U-16 F Z
C127 87-A11-056-080 C-CAP,U 1-10 Z F
C128 87-A10-707-080 C-CAP,U 0.47U-16 F Z
C129 87-016-562-080 C-CAP,TN 4.7-10 SV A
C130 87-A10-263-080 C-CAP,U 0.1-16 Z F
C131 87-A11-797-080 C-CAP,S 2.2-16 Z F
C132 87-A11-797-080 C-CAP,S 2.2-16 Z F
C133 87-016-317-080 C-CAP,TN 2.2-6.3
C134 87-A11-056-080 C-CAP,U 1-10 Z F
C135 87-A11-797-080 CAP, S 2.2-16 ZF
C136 87-A11-797-080 CAP, S 2.2-16 ZF
C137 87-010-805-080 CAP, S 1-16
C138 87-010-805-080 CAP, S 1-16
C141 87-010-828-080 CHIP CAPACITOR,U 0.033-25F
C142 87-010-828-080 CHIP CAPACITOR,U 0.033-25F
C143 87-010-674-080 CAP, ELECT 220-2
C144 87-010-674-080 CAP, ELECT 220-2
C148 87-A11-056-080 C-CAP,U 1-10 ZF
C149 87-A10-707-080 C-CAP,U 0.47U-16 F Z
C170 87-010-785-080 C-CAP,U 0.015-25 KB
C201 87-010-805-080 CAP, S 1-16
C202 87-010-805-080 CAP, S 1-16
C203 87-012-274-080 CHIP CAP,U 1000P-50B
C204 87-A11-187-080 C-CAP,TN 10-4 AM004R
C205 87-A11-188-080 C-CAP,TN 22-4 AM004R
C207 87-A10-369-080 C-CAP,S 0.47-16 K B
C208 87-A10-369-080 C-CAP,S 0.47-16 K B
C209 87-016-460-080 C-CAP,S 0.22-16 B
C210 87-016-460-080 C-CAP,S 0.22-16 B
C301 87-A10-031-080 C-CAP,U 0.01-25 KB
C302 87-A10-260-080 C-CAP,U 0.1-16 K B
C303 87-A11-796-080 C-CAP,S 4.7-10 Z F
C304 87-A10-260-080 C-CAP,U 0.1-16 K B
C305 87-A10-025-080 C-CAP,U 0.22-16Z F
C306 87-A10-707-080 C-CAP,U 0.47U-16 F Z
C307 87-A11-056-080 C-CAP,U 1-10 ZF
C308 87-A10-031-080 C-CAP,U 0.01-25 KB
C309 87-A10-031-080 C-CAP,U 0.01-25 KB
C601 87-A11-189-080 C-CAP,TN 47-4 M BM004R
C602 87-A11-188-080 C-CAP,TN 22-4 AM004R
C701 87-010-505-080 CA, CHIP TANTALUM 1-16
C702 87-A10-263-080 C-CAP,U 0.1-16ZF
C703 87-A11-056-080 C-CAP,U 1-10 Z F
C704 87-A10-263-080 C-CAP,U 0.1-16ZF
C705 87-012-166-080 C-CAP,U 4P-50 C CH
C707 87-A11-056-080 C-CAP,U 1-10 Z F
C708 87-A10-263-080 C-CAP,U 0.1-16ZF
C709 87-A10-263-080 C-CAP,U 0.1-16ZF
C801 87-A11-812-080 C-CAP,E 220-4 MVSV
C903 87-010-831-080 C-CAP,U 0.1-16 ZF
C904 87-010-831-080 C-CAP,U 0.1-16 ZF
C905 87-012-274-080 C-CAP,U 1000P-50 K
C907 87-012-274-080 C-CAP,U 1000P-50 K
J101 85-HK3-605-010 JACK,DIA3.5 ST 5P
L901 87-005-906-080 C-COIL,S 10UH K LK2125
L902 87-005-906-080 C-COIL,S 10UH K LK2125
LED501 87-A90-278-080 C-LED,SML-210VT RED
PS401 87-A91-428-010 SNSR,PHOTO NJL5193K-F10
R105 87-022-281-080 CHIP RES U 680-1/6W F
R106 87-022-281-080 CHIP RES U 680-1/6W F
R107 87-022-281-080 CHIP RES U 680-1/6W F
R108 87-022-281-080 CHIP RES U 680-1/6W F
R203 87-022-252-080 C-RES,U36K-1/16WF
R709 87-022-286-080 C-RES U 100K-1/16WF
R710 87-022-249-080 C-RES U27K 1/16WF
S101 87-036-379-180 C-SW,SL SS-350-A12B-C-T
S102 87-A90-703-080 C-SW,SL 1-1-3 SSSS813-B-2B
S201 87-036-379-180 C-SW,SL 1-1-2 SS-350-A12B-
S701 87-A91-320-080 C-SW,SL 1-1-2 SSSS8A2-B-
S702 87-036-379-180 C-SW,SL 1-1-2 SS-350-A12B-
S703 87-A90-665-280 C-SW,TACT LS7A2M
S704 87-A90-665-280 C-SW,TACT LS7A2M
S705 87-A90-665-280 C-SW,TACT LS7A2M
S706 87-A90-665-280 C-SW,TACT LS7A2M
S707 87-A91-421-010 SW,LEAF 6ZM-2(H)
S708 87-A91-365-080 C-SW,PUSH 1-1-1 SPVG21
S709 87-A91-461-010 SW,PUSH HXW4010
SFR301 87-A91-465-040 C-SFR,K 6.8K H RH03AEC
TH301 87-A90-855-080 C-THMS,SC20-3K102K
VR101 87-A90-116-080 C-VR,RTRY 20KCX2 V XV0103
X701 87-A70-151-110 VIB,XTAL 32.768KHZ VT-
HEAD FLEX C.B
PH1 88-HK5-602-010 HEAD ASSY 6ZM-2(P5)
2

3 4
88
A
Resistor Code
Chip Resistor Part Coding
Figure
Value of resistor
Chip resistor
Wattage Type Tolerance
1/16W
1/10W
1/8W
1608
2125
3216
5%
5%
5%
CJ
CJ
CJ
Form LW t
1.6 0.8 0.45
2 1.25 0.45
3.2 1.6
108
118
128
: A
: A
CHIP RESISTOR PART CODE
0.55
Resistor Code
Dimensions (mm)
Symbol
1/16W 1005 5% CJ
1.0 0.5 0.35 104
Lt
W
TRANSISTOR ILLUSTRATION
IC BLOCK DIAGRAM
IC, MM1279XV
IC, TA2123AF
IC, NJM2185AV
RN2305
RN1310
2SA1162Y
2SC3326B
2SC4116GR
2SA1362GR
RN4605
BE
C
B1
C1
E2
C2
E1
B2

WIRING
65
14 13 12 11 10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14
AA
BB
CC
DD
EE
FF
GG
HH
II
JJ
KK
LL
MM
NN
OO
PP
QQ
RR
SS
TT
UU

SCHEMATIC DIAGRAM (MAIN)
87
PHONES/REMOTE
J101

IC,ML63512-122
ICDESCRIPTION
910
1 AF IN I H:existmusic,L:nomusic.
2 SCLK I Input serial clock (Not used) .
3 MUTE O H: mute OFF, L: mute ON.
4 SDATA O Output serial data (Not used).
5 F/R CONT O H: REV mode, L: FWD mode.
6 MS-SENS O H: FF/REW (include MS, BS), L: Other.
7 MOT DIR O H: counterclockwise, L: clockwise.
8 P-SNSR IN I Input photo sensor.
9 AF-MOMITOR O H: when AF IN "L" level, L: when AF IN "H" level (Not used).
10 MOT ON O H: motor ON, L: motor OFF.
11 MOT BR O H: motor brake ON, L: motor brake OFF.
12 HOLD IN I H : hold OFF, L : hold ON.
13 NC – Not connected.
14 NC – Not connected.
15 KEY MAIN I Main unit key input.
16 REMOTE I Remote controller key input.
17 P- SNSR K O Output for P-SNSR control.
18 LOAD CTL O Output for battery capacity checking (Not used).
19 LED K O Output for OPE, BATT LED control.
20 MOTOR ON L O H: when motor on "L" level, L: when motor on "H" level.
21 VDDI – Interface power supply for external equipment.
22 VSS – Power supply ( - ).
23 VDD – Power supply ( + ).
24 VDDH – Power supply booster for backup.
25 CB1 – Connected to capocitor for power supply booster.
26 CB2 – Connected to capocitor for power supply booster.
27 VDDL – Power supply ( + ) for internal logic.
28 XT0 Connected to crystal oscillator for low speed.
29 XT1 –(32.768 kHz).
30 TEST1B – Test terminal.
31 TEST2B – Test terminal.
32 OSCM – Connected to capacitor for hi speed clock (Not used).
33 OSC0 – Connected to crystal oscillator for hi speed (Not used).
34 OSC1 – Not used.
35 RESETB I Input reset.
36 BEEP O Output beep sound.
37 CASSSW I H: not exist cassette, L: exist cassette.
38 MOTOR CH I Detect motor rotation.
39 LOAD CTL2 O Output for battery capacity checking.
40 TIMING SW I Input mechanism operation detection.
41 REMOTE DET I Switchingleveldetector.
PinNo. PinName I/O Description
42 SET STOP I H: normal operation, L: stop mechanism.
43 P-CHECK O Output for photo sensor puls checking (Not used).
44 FF/REW O H: when MS-SENS. “L” level, L: when MS-SENS. “H” level.
45 POWER ON O H: power ON, L: power OFF.
46 P-SNSR DET I H: ignore input when existing play sound, L: always monitor photo sensor.
47 EJECT SW I Input for eject operation detection. H: normal, L: when EJECT is ON.
48 BS MODE IN I H: continuns playback. enable BS, L: go&return playback. disable BS.
PinNo. PinName I/O Description

11
ADJUSTMENT
PRACTICAL SERVICE FIGURE
<TAPE SECTION>
Tape speed : 3015Hz ± 50Hz
Wow : Less than 0.55% (RMS)
Take-up torque : 20 ~ 30g-cm (FWD)
F.F torque : 70 ~ 150g-cm
REW torque : 70 ~ 150g-cm
Back tension : 1.0 ~ 3.0g-cm (FWD)
S/N ratio : More than 42dB (PB, DC)
Distortion : Less than 3.0% (PB, DC)
Noise level : Less than 3.0mV
(Vol MAX, PB, DC)
Less than 0.4mV
(Vol MIN, PB, DC)
Frequency response : 63Hz + 3 /  5dB ~ 8kHz + 4 /  4dB
(NORMAL)
63Hz + 3 /  5dB ~10kHz + 4 /  4dB
(CrO2)
Test tape : TTA  100
TTA  200
TTA  320(NORMAL)
TTA  310(CrO2)
<TAPE PLAYER SECTION>
1. Tape Speed Adjustment
Settings :  Test tape : TTA  100 (Tape center)
 Test point : Phones Jack (J101)
 Adjustment location : SFR301
 Dolby : OFF
 MSP : CLASSIC
 DSL : OFF
 Tape selector : NORMAL(AUTO)
 Volume : MAX
Method : Play back (FWD) the test tape and adjust
SFR301 so that the frequency becomes
3015Hz ± 10Hz. Then confirm WOW is
less than 0.50%.
2. Dolby Level Adjustment
Setting :  Test tape : TTA  200
 Test point : TP1(RCH),TP2(LCH)
 DSL : OFF
 Tape selector : NORMAL
 Dolby SW : OFF
 Volume : MIN
 Adjustment points : Soldered patterns 
Procedure : Short the patterns via solder as showen in the
table so the Dolby NR level is 24.5mV ± 1.0dB.
Adjust so the specifications are satisfied in both
the forward and reverse directions. Connect 10mF
/16V coupling capacitors between test points and
test equipment (connect the positive terminals to
the test points).
SOLDER PATTERN 
STANDARD : 24.5 ± 1.0dB
14
Lch
Rch
SOLDER POINT INCRESE LEVEL
3
2
1
4
only +1dB
and
only
1 2
only
only
3and 4
+1.5dB
+2.5dB
+1dB
+1.5dB
+2.5dB
14
SFR 301
MAIN C.B
A
PHONES
J101
1
1
VR101
VOLUME
TP1
(R-CH)
(L-CH)
TP2
IC701
1
2
GND
IC301
2
22
3
4
2

MECHANICAL EXPLODED VIEW 1/1
12
HS-PX797
(FileName:EXPRODED.EPS)
99/7/2
K
K
C
A
B
K
J
B
J
HE
G
F
F
G
I
M
L
M
K
32
SPACER
PWB
89
31
12
3
4
5
7
6
30
29
28
10
6ZM-2 P11NF
11
13
14
15
16
17
20
19
12
27
25
24
23
21
22
18
P.C.B
26

DESCRIPTIONREF. NO. KANRI
NO.
PART NO. KANRI
NO.
REF. NO. DESCRIPTIONPART NO.
MECHANICAL PARTS LIST 1/1
13
Basic color Color Basic color Color Basic color Color
symbol symbol symbol
B Black C Cream D Orange
G Green H Gray L Blue
LT Transparent Blue N Gold P Pink
R Red S Silver ST Titan Silver
T Brown V Violet W White
WT Transparent White Y Yellow YT Transparent Yellow
LM Metallic Blue L L Light Blue GT Transparent Green
LD Dark Blue DT Transparent Orange
COLOR NAME TABLE
1 8Z-HK3-002-010 LID ASSY,CASS
2 8Z-HK5-216-010 SPR-P,POP-UP
3 8Z-HK5-214-010 HLDR ASSY,CASS MOT
4 88-HK5-208-010 ARM,SLIDE
5 8Z-HK5-213-010 HLDR,CASS JACK
6 8Z-HK5-021-010 WINDOW,CASS SMK
7 8Z-HK5-012-010 KNOB,SL BS
8 8Z-HRB-207-010 SPR-P,CASS
9 8Z-HK3-004-010 FRAME,CENTER
10 8Z-HK5-202-010 PLATE,HINGE MOT
11 88-HK5-220-010 SPR-P,MECHA EARTH
12 8Z-HK3-008-010 LID,BATT GLD
13 8Z-HK5-206-010 BAT-CONTACT,P
14 88-HK5-216-010 SHAFT,BAT
15 8Z-HK5-209-010 HLDR,CONT B-BOX
16 8Z-HK5-207-010 BAT-CONTACT,BOX HEAD
17 8Z-HK3-001-010 CABI,REAR
18 8Z-HK5-009-010 KNOB,RTRY HOLD
19 8Z-HK5-008-010 LENS,LED
20 8Z-HK3-005-010 PANEL,CABI BRN
21 8Z-HK5-010-010 KNOB,SL OPEN
22 8Z-HK3-006-010 KNOB,SL DSL BRN
23 8Z-HK5-210-010 HLDR,KNOB OPEN
24 8Z-HK5-221-010 SPR-T,CLICK
25 8Z-HK5-222-010 JOINT,HOLD
26 8Z-HK5-007-010 KEY,CONT
27 8Z-HK5-204-010 PLATE,B-BOX
28 8Z-HK5-226-010 BAT-CONTACT,M
29 8Z-HK5-224-010 SPR-E,OPEN
30 8Z-HK5-203-010 PLATE,OPEN
31 8Z-HK5-201-010 PLATE,HINGE JACK
32 8Z-HK5-011-010 KNOB,SL TP
A 87-067-588-010 SCREW,V+1.4-1.4
B 87-HK5-240-010 S-SCREW,1.4-1 CR NL
C 87-HK5-237-010 S-SCREW,1.4-2 CR NL
D 87-078-116-010 SCRW M1.4-2.5B NL
E 88-HK5-228-010 S-SCREW,+1.4-2 CR
F 87-067-746-010 SCREW,M 1.4-2(H0.5)
G 87-078-052-010 S-SCREW+1.4-3.5HL(B)
H 8Z-HK5-227-010 S-SCREW,+1.7-3.5 BLK HL
I 87-078-079-010 V+1.4-4.7CRN
J 87-HK5-235-010 S-SCREW,1.4-0.6-2.5
K 87-067-385-010 SCREW,VT +1.4-2.5HL
L 87-067-597-010 VT1.4-25HL
M 87-HK5-236-010 S-SCREW,1.4-2.3

TAPE MECHANISM EXPLODED VIEW 1/1
14
2
3
4
5
6
6
1
7
8
9
10
11
43
41
42
20
21
22
25
26
22
23
44
18
39
38
a
b
c
d
e
a
b
c
d
e
f
HEAD FLEX C.B
43
32
40
SH,1.2-2.9-0.25SL
SH,1.2-2.9-0.25SL
13
15
24
27
28
30
31
34
35
36
37
17
17
29
16
F
49
49
19
45
46
47
33
12
f
D
A
50
50
C
B
B
20
C
Gg
g
51
14
53
48
HLDR,FP
PLATE,THRUST
52
E
H
54
54