Sony XR-1800 User manual
MICROFILM
SERVICE MANUAL
AEP Model
UK Model
E Model
XR-1800
East European Model
XR-1803
Saudi Arabia Model
XR-1804
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MG-36SZ9-32
SPECIFICATIONS
XR-1800/1803/1804
Photo: XR-1804
– Continued on next page –
XR-1800: AEP, UK Model/XR-1803
FM/MW/LW CASSETTE CAR STEREO
XR-1800: E Model
FM/AM CASSETTE CAR STEREO
XR-1804
FM/MW/SW CASSETTE CAR STEREO
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– 2 –
TABLE OF CONTENTS
1. GENERAL
Button Locations ............................................................. 3
Setting the Clock ............................................................. 3
Installation....................................................................... 4
Connections ..................................................................... 4
2. DISASSEMBLY ......................................................... 6
3. MECHANICAL ADJUSTMENTS ....................... 10
4. ELECTRICAL ADJUSTMENTS
Tape Deck Section .......................................................... 10
Tuner Section .................................................................. 11
5. DIAGRAMS
5-1. IC Pin Function Description ........................................... 14
5-2. Note for Printed Wriring Boards and
Schematic Diagrams ....................................................... 16
5-3. Printed Wiring Board – Main Section – ........................ 17
5-4. Schematic Diagram – Main Section (1/2) – ................... 19
5-5. Schematic Diagram – Main Section (2/2) – ................... 21
5-6. Printed Wiring Board – PANEL Section – .................... 23
5-7. Schematic Diagram – PANEL Section – ....................... 23
6. EXPLODED VIEWS................................................ 26
7. ELECTRICAL PARTS LIST ............................... 32
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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– 6 –
COVER ASS’Y
MECHANISM DECK BLOCK
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
1
two screws
(PTT2.6
×
6)
3
mechanism deck bloc
k
1
two screws
(PTT2.6
×
6)
2
connector
(CN901)
3
cover ass’y
2
2
1
1
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– 7 –
MAIN BOARD, HEAT SINK
MECHANISM DECK
(MG-36SZ9-32)
1
two screws
(PTT2.6
×
6
)
2
heat sink
3
two screws
(ground point)
4
main board
1
five screws
(PTT2.6
×
8)
1
two screws
(P2.6
×
4)
3
mechanism dec
k
(MG-36SZ9-32)
1
two screws
(P2.6
×
4)
2
bracket (MD)
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– 8 –
MOTOR ASS’Y (CAPSTAN/REEL) (M901)
CASSETTE HANGER (X)
1
two screws
(P2
×
3)
3
motor ass’y (CAPSTAN/REEL
)
(M901)
2
belt
2
belt
1
Remove the claw toward
direction.
2
Remove the return link
toward direction.
5
cassette hanger
3
boss
3
boss
4
two claws
1
Remove the claw toward
direction.
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– 9 –
CASSETTE HOLDER (X)
A
1
Push an arrow
A
part.
2
Removal the cassette holder (x
)
to direction of the arrow.
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– 10 –
SECTION 3
MECHANICAL ADJUSTMENTS
Mode Tension Meter Meter Reading
Forward CQ-403A more than 60 g
Reverse CQ-403R (more than 2.12 oz)
•TapeTension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head pinch roller
rubber belt capstan
idler
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the power supply
voltage (14.4 V) unless otherwise noted.
•Torque Measurement
Mode Torque Meter Meter Reading
Forward CQ-102C 25 – 55 g•cm
(0.35 – 0.76 oz•inch)
Forward CQ-102C 1.5 – 4 g•cm
Back Tension (0.02 – 0.06 oz•inch)
Reverse CQ-102RC 25 – 55 g•cm
(0.35 – 0.76 oz•inch)
Reverse CQ-102RC 1.5 – 4 g•cm
Back Tension (0.02 – 0.06 oz•inch)
FF, REW CQ-201B 50 – 150 g•cm
(0.69 – 2.08 oz•inch)
SECTION 4
ELECTRICAL ADJUSTMENTS
TAPE DECK SECTION 0 dB= 0.775 V
1. The adjustments should be performed in the order given in
this service manual.
2. The adjustments should be performed for both L-CH and
R-CH.
TestTape
PB Head Azimuth Adjustment
Procedure:
1. Put the set into the FWD PB mode.
2. Turn the screw and check the output peak value. Adjust the
screw so that the peak value in channels L and R coincides
within 2 dB.
3. Check the phase in the FWD PB mode.
Type Signal Used for
P-4-A063 6.3 kHz, –10 dB head azimuth adjustment
WS-48A 3 kHz, 0 dB tape speed adjustment
screw
position
L-CH
peak
within
2 dB
output
level
L-CH
peak R-CH
peak
within
2 dB
angl
e
R-CH
peak
test tape
P-4-A063
(6.3 kHz, –10 dB)
L-CH
R-CH speaker out terminal
oscilloscope
VH
++
––
Screen pattern
in phase good wrong
45
°
90
°
135
°
180
°
4
Ω
4
Ω
set
level
meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
speaker out termina
l
4
Ω
+
–
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– 11 –
4. Repeat the above adjustment for the REV PB mode.
5. Check that output level difference between FWD PB mode
and REV PB mode is within 4 dB.
Adjustment Location: PB head
Tape Speed Adjustment
Setting:
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 13.
See the adjustment location from on page 13 for the
adjustment.
Speed checker Frequency counter
–2 to +3% 2,940 to 3,090 Hz
TUNER SECTION
XR-1800 E model, a tuner section is no adjustment.
0 dB=1 µV
Cautions during repair
When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.
Note: Adjust the tuner section in the sequence shown below.
1. FM Auto Scan/Stop Level Adjustment
2. FM Noise Focus Adjustment
3. FM Stereo Separation Adjustment
4. MW Auto Scan/Stop Level Adjustment
FM Auto Scan/Stop Level Adjustment
Setting:
[TUNER] button: FM 1
FREQUENCY SELECT switch: FM50 k (XR-1804 only)
Procedure:
1. Tune the set to 98.0 MHz.
2. Connect the digital voltmeter to TP2 (SD) on MAIN board.
3. Adjust RV2 on TU100 so that the reading on the digital volt-
meter changes point from low to high.
Adjustment Location: See page 13.
FWD
REV
adjustment
screws
+–
speed checker
or
frequency counter
test tape
WS-48A
(3 kHz, 0 dB)
speaker out terminal
set
4
Ω
FM RF signal
generator dummy
antenna
Carrier frequency : 98.0 MHz
Output level : 28 dB (25.1
µ
V)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30%
)
antenna
jack (CN900
)
set
50
Ω
50
Ω
0.1pF
+
–
TP2 (SD)
MAIN board
digital
voltmeter
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– 12 –
MW Auto Scan/Stop Level Adjustment
Setting:
[TUNER] button: MW
FREQUENCY SELECT switch: MW 9 k (XR-1804 only)
Procedure:
1. Tune the set to 999 kHz
2. Connect the digital voltmeter to TP2 (SD) on MAIN board.
3. Adjust RV1 on TU100 so that the reading on the digital volt-
meter changes point from low to high.
Adjustment Location: See page 13.
FM Noise Focus Adjustment (XR-1804 only)
Setting:
[TUNER] button: FM1
FREQUENCY SELECT switch: FM 50 k
Procedure:
1. Tune the 98.0 MHz.
2. The then output level is supposing that (A) dB.
3. Adjust with the volume RV3 on TU100 so that the output level
is (A) –32 dB then signal generator input set to –20 dB.
Adjustment Location: See page 13.
FM Stereo Separation Adjustment
Setting:
[TUNER] button: FM1
FREQUENCY SELECT switch : FM 50 k (XR-1804 only)
Procedure:
L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.
Specification: Separation more than 26 dB
Adjustment Location: See page 13.
FM Stereo Level meter Level meter
signal generator connection reading (dB)
output channel
L-CH L-CH A
B
R-CH L-CH Adjust RV4 on TU100
for minimum reading.
R-CH R-CH C
D
L-CH R-CH Adjust RV4 on TU100
for minimum reading.
FM RF signal
generator
Carrier frequency : 98.0 MHz
Output level : 60 dB (1 mV)
Mode : mono
Modulation : 1 kHz, 75 kHz deviation (100%)
0.01
µ
F
set
antenna jack (CN900)
+
–
speaker out terminal
level meter
4
Ω
FM RF signal
generator
Carrier frequency : 98.0 MHz
Output level : 76 dB (6.3 mV)
Mode : stereo
Modulation : main: 1 kHz, 33.75 kHz deviation (45%)
sub: 1 kHz, 33.75 kHz deviation (45%)
19 kHz pilot: 7.5 kHz deviation (10%)
0.01
µ
F
set
antenna jack (CN900)
+
–
speaker out terminal
level meter
4
Ω
AM RF signal
generator
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
Output level : 33 dB (44.7
µ
V)
(50
Ω
)set
AM dummy antenna
30
Ω
15 pF
65 pF
antenna jack (CN900)
+
–
TP2 (SD)
MAIN board
digital
voltmeter
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– 13 –
Adjustment Location:
Tape Speed Adjustment
RV1 MW Auto Scan/Stop Level Adjustment
TU100
RV2 FM Auto Scan/Stop Level Adjustment
RV3 FM Noise Focus Adjustment
RV4 FM Stereo Separation Adjustment CN901
S1
FREQUENCY
SELECT
SWITCH
10 k (MW)
200 k (FM)
9 k (MW)
50 k (FM)
↔
TP2 (SD)
– SET BOTTOM VIEW –
– SET UPPER VIEW –
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– 14 –
SECTION 5
DIAGRAMS
•
Pin No. Pin Name I/O Function
1 XIN I System clock input terminal (4.5 MHz)
2 TEST2 I Connected to ground
3 NC I Not used (fixed at “H”)
4 AM-SD I AM signal meter voltage detection input from the FM/AM tuner unit (TU100) “H” active
5 FM-SD I FM signal meter voltage detection input from the FM/AM tuner unit (TU100) “H” active
6 STEREO I Stereo detection signal input from the FM/AM tuner unit (TU100) (Commonly used for stereo
display input) FM stereo detection at input of “L”
7 MOTOR O Capstan/reel motor (M901) drive signal output “H”: motor on
8 AMP-MUTE2 O Muting control signal output to the power amplifier (IC500) “L”: muting on
9 MW/SW O MW/SW selection signal output to the FM/AM tuner unit (TU100) “H”: MW, “L”: SW
Used for the XR-1804 only
10 — O Not used (open)
11 BEEP O Beep sound signal output terminal “H” active
12 POWER-ON O Power on/off control signal output “H”: power on
13 ILL-ON O Power on/off control signal output for the liquid crystal display driver (IC900), illumination lamp
and back light lamp “H”: power on
14 N/R I Tape direction switch (S901) input terminal “H”: forward side, “L”: reverse side
15 TAPE-IN I Tape in detection switch (S903) input terminal “L”: tape in
16 FF-REW I FF/REW detection switch (S902) input terminal “L”: FF/REW mode
17 K1 I Key matrix return signal input terminal Not used (fixed at “L”)
18 K0 I Key matrix return signal input terminal
19 AMP-ON O Standby on/off signal output to the power amplifier (IC500) “L”: standby, “H”: amp on
20 SEEK O Seek control signal output to the FM/AM tuner unit (TU100) “H” active
Used for the XR-1800: E model only
21 SEEK O Seek control signal output to the FM/AM tuner unit (TU100) “L” active
Used for the except XR-1800: E model
22 LOCAL/DX O Local/DX selection signal output to the FM/AM tuner unit (TU100) “L”: DX, “H”: local
23, 24 — O Not used (open)
25 T2 O Key matrix scan signal output terminal Used for the XR-1800: E model and XR-1804
26 T1 O Key matrix scan signal output terminal Not used (open)
27 T0 O Key matrix scan signal output terminal Used for the XR-1800: AEP, UK models
28 VOL-CE O Chip enable signal output to the electrical volume (IC450) “H” active
29 VOL-DI O Serial data output to the electrical volume (IC450) “H” active
30 VOL-CL O Serial data transfer clock signal output to the electrical volume (IC450)
31 VDD — Power supply terminal (+5V)
32 MUTE-REQ I Muting request signal input terminal (“H” active) “L”: accessory on, “H”: accessory off
33 BAND-KEY I TUNER switch (S900) input terminal “L” is input when pressing the switch
34 PANEL-IN I Detects the removal of the attaching and removing type front panel block “L”: attaching
35 NC I Not used (fixed at “L”)
36 to 40 — O Not used (open)
41 MUTE O Audio muting on/off control signal output terminal “H”: muting on Not used (open)
42 — O Not used (open)
43 AMP-MUTE O Amp muting on/off control signal output terminal “L”: muting on Not used (open)
44 ANT-REM O Control signal output for the external power antenna and external amplifier “H” active
45 to 48 — O Not used (open)
MAIN BOARD IC1 (SYSTEM CONTROLLER)
LC72322N-9400 (XR-1800), LC72322N-9399 (XR-1803), LC72322N-9412 (XR-1804)
5-1. IC PIN FUNCTION DESCRIPTION
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– 15 –
Pin No. Pin Name I/O Function
49 KS2 O
50 KS1 O Key matrix scan signal output terminal
51 KS0 O
52 — O Not used (open)
53 LCD-CLK O Serial data transfer clock signal output to the liquid crystal display driver (IC900)
54 LCD-CE O Chip enable signal output to the liquid crystal display driver (IC900) “H” active
55 LCD-DATA O Serial data output to the liquid crystal display driver (IC900) “H” active
56 AM-ON O AM system power supply on/off control signal output terminal “H”: AM on
57 MONO O Not used (open)
58 to 60 — O Not used (open)
61 FM-ON O FM system power supply on/off control signal output terminal “H”: FM on
62 TUNER-ON O Tuner system power supply on/off control signal output terminal “H”: tuner on
Not used (open)
63 MW/LW O MW/LW selection signal output terminal “L”: MW, “H”: LW Not used (open)
64, 65 — O Not used (open)
66 NC I Not used (fixed at “L”)
67 CE I Accessory switch on/off detection signal input terminal
“H”: accessory on, “L”: accessory off (hold mode)
68 RESET I System reset signal input terminal “L”: reset
69 KEY-IN I Key matrix return signal input terminal (A/D input)
70 IFIN I FM and AM intermediate frequency detection signal input from the FM/AM tuner unit (TU100)
71 NC I Not used (fixed at “L”)
72 BU-CHECK I Battery detect signal input terminal
73 VDD — Power supply terminal (+5V)
74 FMIN I FM local oscillator input from the FM/AM tuner unit (TU100)
75 AMIN I AM local oscillator input from the FM/AM tuner unit (TU100)
76 VSS — Ground terminal
77 EO O Main charge-pump control signal output terminal
78 — O Not used (open)
79 TEST1 I Connected to ground
80 XOUT O System clock output terminal (4.5 MHz)
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2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 16 –
5-2. NOTE FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS
• Waveform
1IC1 1(XIN)
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.
•¢: internal component.
•2: nonflammable resistor.
•C: panel designation.
•U: B+ Line.
• Powervoltage is dc14.4Vandfedwithregulateddc power
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : MW
〈〈 〉〉 : SW (XR-1804 only)
[ ] :TAPE PLAYBACK
• Voltagesare takenwithaVOM(Inputimpedance 10 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: MW (LW/SW)
E:TAPE PLAYBACK
Note on Printed Wiring Boards:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•¢: internal component.
•b:Pattern from the side which enables seeing.
2 Vp-p
222 ns
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
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1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
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1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
5-3. PRINTED WIRING BOARD – MAIN Section –
– 17 – – 18 –
XR-1800/1803/1804
• Semiconductor
Location
Ref. No. Location
D1 J-4
D2 H-6
D3 G-6
D10 H-3
D12 I-2
D13 I-5
D14 I-5
D15 I-6
D16 I-6
D17 I-6
D18 I-6
D19 I-6
D20 I-6
D100 G-9
D350 I-8
D351 G-9
D503 D-7
D506 E-6
D551 D-6
D600 E-5
D601 E-2
D602 F-2
D603 E-3
D605 E-4
D606 C-4
D607 F-5
D608 E-6
D609 E-2
D610 F-5
D611 F-5
D620 C-5
D621 E-5
IC1 H-4
IC350 H-9
IC450 H-7
IC500 C-7
Q10 F-2
Q30 I-7
Q31 H-6
Q32 H-6
Q60 F-3
Q100 E-9
Q101 E-9
Q102 F-9
Q103 F-9
Q104 G-8
Q105 F-8
Q106 F-3
Q350 J-7
Q351 J-7
Q553 C-9
Q554 C-9
Q600 F-2
Q601 D-2
Q602 E-2
Q604 F-3
Q605 F-4
Q606 F-4
Q608 F-4
Q610 F-5
Q611 F-5
Q612 F-3
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
XR-1800/1803/1804
5-4. SCHEMATIC DIAGRAM – MAIN Section (1/2) – • See page 16 for Waveform.
– 19 – – 20 –
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
XR-1800/1803/1804
– 21 – – 22 –
5-5. SCHEMATIC DIAGRAM – MAIN Section (2/2) – • See page 27 for IC Block Diagram.
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
XR-1800/1803/1804
– 23 – – 24 –
5-6. PRINTED WIRING BOARD – PANEL Section –
• Semiconductor
Location
Ref. No. Location
D4 B-9
D900 C-10
D901 C-7
D902 C-6
D903 C-8
IC900 B-9
5-7. SCHEMATIC DIAGRAM – PANEL Section –
• Waveform
2IC900 #™ (OSC)
2.2 Vp-p
15
µ
s
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
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0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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