Sony FM/AM CASSETTE XR-C5120 User manual
MICROFILM
SERVICE MANUAL
FM/AM CASSETTE CAR STEREO
US Model
Canadian Model
Model Name Using Similar Mechanism XR-C5100
Tape Transport Mechanism Type MG-25F-136
SPECIFICATIONS
XR-C5120
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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– 2 –
TABLE OF CONTENTS
1. GENERAL
Location of Controls ....................................................... 3
Resetting the Unit ........................................................... 4
Detaching the Front Panel............................................... 4
Setting the Clock ............................................................. 4
Installation....................................................................... 5
Connections ..................................................................... 6
2. DISASSEMBLY ......................................................... 9
3. ASSEMBLY OF MECHANISM DECK........... 10
4. MECHANICAL ADJUSTMENTS....................... 13
5. ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 13
Tape Deck Section .......................................................... 13
Tuner Section .................................................................. 14
6. DIAGRAMS
6-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 15
6-2. Printed Wiring Board – MAIN Board – ......................... 17
6-3. Schematic Diagram – MAIN Board (1/2) – ................... 19
6-4. Schematic Diagram – MAIN Board (2/2) – ................... 21
6-5. Printed Wiring Board – KEY Board –........................... 23
6-6. Schematic Diagram – KEY Board – .............................. 25
6-7. IC Pin Function Description ........................................... 29
7. EXPLODED VIEWS................................................ 32
8. ELECTRICAL PARTS LIST ............................... 35
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
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TEL 13942296513 QQ 376315150 892498299
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– 9 –
SUB PANEL, MECHANISM DECK (MG-25F-136)
MAIN BOARD, HEAT SINK
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
1
three screws
(PTT2.6
×
8)
2
sub panel
3
connector
(CN351)
5
screw
(PTT2.6
×
6)
6
mechanism dec
k
(MG-25F-136)
4
flexible flat cable
(CN301)
1
three screws
(PTT2.6
×
8)
3
two ground point
screws
5
three screws
(PTT2.6
×
8)
5
two screws
(PTT2.6
×
10)
1
screw
(PTT2.6
×
8)
5
two screws
(PTT2.6
×
8)
6
heat sink
2
rubber cap (25)
1
two screws
(PTT2.6
×
8)
4
main board
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TEL 13942296513 QQ 376315150 892498299
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– 10 –
SECTION 3
ASSEMBLY OF MECHANISM DECK
HOUSING
ARM (SUCTION)
Note: Follow the assembly procedure in the numerical order given.
A
part
C
part
B
part
D
part
8
Hold the hanger by
bending the claw.
6
Fit projection on
D
part.
4
Fit claw on
B
part.
3
Put the housing
under
A
part.
5
Fit projection on
C
part.
1
Install the catch to the hanger.
2
Install the hanger onto
two claws of the housing.
7
Holder the hanger by bending the claw.
hanger
housing
2
Move the arm (suction) in the arro
w
direction and fit on projection.
1
Fit the arm (suction) on the shaft.
projection
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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– 11 –
LEVER (LDG-A)/(LDG-B)
GEAR (LDG-FT)
shaft
A
shaft
B
shaft
C
1
Fit the lever (LDG-A) on
shafts
A
–
C
and install it.
shaft
A
shaft
B
2
Fit the lever (LDG-B) on
shafts
A
and
B
and
install it.
3
type-E stop ring 2.0
gear (LDG-D)
5
gear (LDG-FT)
6
polyethylene washer
2
tension spring (LD-2)
2
tension spring (LD-1)
gear (LDG-FB)
lever (LDG-A)
hole
hole
4
Align hole in the gear (LDG-D)
with hole the lever (LDG-A).
3
Move the lever (LDG-B)
in the arrow direction.
1
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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– 12 –
GUIDE (C)
2
guide (C)
1
three claws
MOUNTING POSITION OF CAPSTAN/REEL MOTOR (M901)
two precision screws
(P2
×
2)
capstan / reel moto
r
(M901)
30˚
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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– 13 –
SECTION 4
MECHANICAL ADJUSTMENTS SECTION 5
ELECTRICAL ADJUSTMENTS
1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head pinch roller
rubber belt capstan
idlers
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the power supply
voltage unless otherwise noted.
•Torque Measurement
Mode Tension Meter Meter Reading
Forward CQ-403A more than 90 g
(more than 3.18 oz)
Reverse CQ-403R more than 90 g
(more than 3.18 oz)
•Tape Tension Measurement
Mode Torque Meter Meter Reading
Forward CQ-102C 30 – 65 g•cm
(0.42 – 0.90 oz•inch)
Forward CQ-102C 0.5 – 4.5 g•cm
Back Tension (0.01 – 0.06 oz•inch)
Reverse CQ-102RC 30 – 65 g•cm
(0.42 – 0.90 oz•inch)
Reverse CQ-102RC 0.5 – 4.5 g•cm
Back Tension (0.01 - 0.06 oz•inch)
FF, REW CQ-201B 60 – 200 g•cm
(0.83 – 2.78 oz•inch)
TEST MODE
<Set the Test Mode>
1. Set the “power select” switch (S501) is “A (ON)” position.
2. Turn ON the regulated power supply. (All LEDs on the set
lights up, and the clock is displayed)
Note: Press the [OFF] button, if the clock is not displayed.
3. Push the preset [4] button.
4. Push the preset [5] button.
5. Press the preset [1] button for more than two seconds.
6. Then the display indicates all lights, the test mode is set.
<Release the Test mode>
1. Push the [OFF] button.
2. Return the “power select” switch (S501) to initially set posi-
tion.
See the adjustment location from on page 14 for the
adjustment.
0 dB=0.775 V
Speed checker Frequency counter
–1.5 to +2.5% 2,955 to 3,075 Hz
TAPE DECK SECTION
set +–
test tape
WS-48A
(3 kHz, 0 dB)
AUDIO OUT jack (J331)
10 k
Ω
speed checker
or
frequency counter
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the
reading on the speed checker or frequency counter becomes in
specification.
Specification: Constant speed
Adjustment Location: See page 14.
Tape Speed Adjustment
Setting:
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 14 –
TUNER SECTION 0 dB=1 µV
The tuner section has no adjustment.
Adjustment Location:
– SET UPPER VIEW –
Tape Speed Adjustment
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 15 –
SECTION 6
DIAGRAMS
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•b: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partsonthepattern facesideseen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•C: panel designation.
•U: B+ Line.
• Powervoltageis dc14.4Vand fedwithregulated dcpower
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM
〈〈 〉〉 :TAPE PLAYBACK
∗: Impossible to measure
• Voltages are takenwith aVOM (Inputimpedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F: FM
f: AM
E:TAPE PLAYBACK
L: BUS AUDIO IN
6-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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– 16 –
• Waveforms
– MAIN Board –
1IC21 1(XT OUT)
2IC501 !∞ (XT IN)
3IC501 !£ (OSC IN)
0.2 Vp-p
97.6 ns
1.7 Vp-p
30.5
µ
s
1.3 Vp-p
54.2 ns
2.7 Vp-p
27
µ
s
– KEY Board –
1IC901 ^º OSC
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
XR-C5120
– 17 – – 18 –
6-2. PRINTED WIRING BOARD – MAIN Board –
D1 F-1
D51 E-11
D52 E-11
D351 I-12
D352 G-13
D501 J-5
D551 F-12
D552 F-12
D553 I-9
D554 F-12
D571 D-10
D572 D-10
D581 G-11
D582 C-13
D583 B-13
D584 B-13
D585 C-13
D586 B-13
D587 G-12
D601 J-13
D610 D-11
D611 D-11
D613 D-11
D614 C-11
D621 E-6
D622 E-7
D623 E-6
D624 E-7
D701 J-3
D702 K-3
D704 K-3
D705 K-5
D706 K-5
D707 K-5
D708 K-5
D709 K-5
D710 J-3
D711 K-5
D712 K-5
D713 K-5
D721 D-8
Ref. No. Location
Ref. No. Location
• Semiconductor Location
D722 D-8
D723 D-8
D724 D-9
D731 B-7
D732 D-7
D733 D-7
D734 B-7
D781 D-13
IC21 E-3
IC301 H-4
IC331 E-5
IC351 I-12
IC501 I-7
IC551 J-12
IC581 C-14
IC611 D-13
IC751 B-7
Q51 E-11
Q52 E-11
Q121 G-4
Q151 G-6
Q171 A-4
Q181 A-3
Q251 G-6
Q271 A-3
Q281 B-3
Q351 H-12
Q352 H-12
Q353 H-12
Q354 H-13
Q551 I-10
Q571 D-9
Q581 G-11
Q582 G-13
Q601 J-13
Q602 J-12
Q621 F-7
Q622 F-7
(Page 24)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
XR-C5120
– 19 – – 20 –
6-3. SCHEMATIC DIAGRAM – MAIN Board (1/2) – • See page 16 for Waveforms. •See page 27 for IC Block Diagrams.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
XR-C5120
– 21 – – 22 –
6-4. SCHEMATIC DIAGRAM – MAIN Board (2/2) – • See page 28 for IC Block Diagrams.
(Page 25)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
XR-C5120
– 23 – – 24 –
• Semiconductor
Location
(Component Side)
Ref. No. Location
D902 B-12
D903 B-12
D904 B-11
D951 C-9
Q945 C-2
6-5. PRINTED WIRING BOARD – KEY Board –
• Semiconductor
Location
(Conductor Side)
Ref. No. Location
IC901 C-8
(Page 17)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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