Sony XR-3758 Service manual

XR-3758/3759

SERVICE MANUAL

Photo: XR-3759

• XR-3758/3759 are almost same as XR-3750 UK model. Printed wiring boards, schematic diagram, exploded views and electrical parts list are described in this service manual. Please refer to XR-3750/C350 service manual previously issued for the other informations.

UK Model

Model Name Using Similar Mechanism XR-3750/C350 T ape Transport Mechanism T ype

SERVICING NOTES

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

MG-52A-135

TABLE OF CONTENTS

1. EXPLODED VIEWS ................................................ 2

2. DIAGRAMS

2-1. Printed Wiring Boards –MAIN Section– ........................ 6

2-2. Schematic Diagram –MAIN Section– ............................ 9

2-3. Printed Wiring Board –KEY Section– ........................... 14

2-4. Schematic Diagram –KEY Section– .............................. 16

3. ELECTRICAL PARTS LIST................................ 19

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.

FM/MW/LW CASSETTE CAR STEREO

MICROFILM

NOTE:

• -XX and -X mean standardized parts, so they

may have some difference from the original one.

• Color Indication of Appearance Parts

Example: KNOB, BALANCE (WHITE) . . . (RED)

↑↑

Parts Color Cabinet's Color

SECTION 1

EXPLODED VIEWS

• Items marked “*” are not stocked since they

are seldom required for routine service. Some delay should be anticipated when ordering these items.

• The mechanical parts with no reference num-

ber in the exploded views are not supplied.

• Hardware (# mark) list and accessories and

packing materials are given in the last of the electrical parts list.

(1) CHASSIS SECTION

MG-52A-135

not supplied

F801

Front panel ass’y

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

1 3-009-294-01 PANEL, SUB 2 3-935-003-01 SPRING, TORSION 3 3-932-205-21 DOOR, CASSETTE (XR-3758) 3 3-932-205-71 DOOR, CASSETTE (XR-3759)

4 X-3367-636-1 LOCK ASSY

* 5 3-010-376-01 INSULATOR * 6 A-3309-950-A MAIN BOARD, COMPLETE (XR-3759) * 6 A-3309-953-A MAIN BOARD, COMPLETE (XR-3758)

7 3-915-923-01 SCREW, GROUND POINT

* 8 X-3373-504-1 COVER ASSY

* 10 3-012-264-01 BRACKET (52) * 11 3-010-471-01 HEAT SINK

12 9-911-840-XX CUSHION (U)

* 13 3-009-813-11 CHASSIS (XR-3758) * 13 3-009-813-31 CHASSIS (XR-3759)

* 15 A-3309-913-A CONNECTOR BOARD, COMPLETE (XR-3758) * 15 A-3313-078-A CONNECTOR BOARD, COMPLETE (XR-3759) * 18 3-012-860-01 CAP (52), RUBBER * 19 3-009-816-01 BRACKET (IC) (ISO)

F801 1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A)

– 2 –

(2) FRONT PANEL SECTION

PL901

not supplied (KEY board)

LCD901

PL902

Ref. No. Part No. Description Remark

51 3-009-301-01 BUTTON (BASS) 52 3-010-472-01 BUTTON (L2) (+. –) 53 3-009-304-01 BUTTON (RELEASE) 54 3-935-119-01 SPRING (RELEASE) 56 X-3373-702-1 PANEL SUB ASSY (XR-3759)

56 X-3373-703-1 PANEL SUB ASSY (XR-3758)

57 3-009-300-01 BUTTON (SOURCE)

58 3-009-297-11 BUTTON (L) (+ + ). SEEK AMS.

= 0 –. r. OFF. SEL. MUTE)

59 3-010-473-01 BUTTON (1–3) (6. 1. 2. 3)

Ref. No. Part No. Description Remark

60 3-010-474-11 BUTTON (4–6) (4. 5. 6)

61 3-009-315-01 BUTTON (R) (3) (BTM. LCL. DSPL)

* 62 3-010-282-01 PLATE (LCD), GROUND * 63 3-012-669-01 SHEET (REFLECTOR) * 64 3-009-302-01 PLATE (LCD), LIGHT GUIDE * 65 3-009-303-02 HOLDER (LCD)

66 3-010-519-01 PANEL, FRONT BACK

LCD901 1-801-678-11 DISPLAY PANEL, LIQUID CRYSTAL PL901 1-517-633-21 LAMP, PILOT (LCD BACK LIGHT)

PL902 1-517-633-21 LAMP, PILOT (LCD BACK LIGHT)

– 3 –

(3) MECHANISM DECK SECTION-1

(MG-52A-135)

105

106

107

103

104

102

101

110

111

112

108

109

M901

Ref. No. Part No. Description Remark

101 3-928-675-01 BELT (52)

* 102 3-928-673-01 LEVER (LDG-A)

103 3-928-674-01 LEVER (LDG-B) 104 3-933-341-01 SPRING (LEVER LDG), TENSION 105 3-928-671-01 HOUSING

* 106 3-933-347-01 ARM (SUCTION)

107 3-933-340-01 HANGER

Ref. No. Part No. Description Remark

108 3-933-346-01 CATCHER 109 3-933-344-01 GUIDE (C) 110 3-341-753-11 WASHER, POLYETHYLENE 111 3-933-335-01 GEAR (LDG-FT) 112 3-928-667-01 GEAR (LDG-A)

– 4 –

(4) MECHANISM DECK SECTION-2

(MG-52A-135)

164

HP901

163

165

S901

166

162

159

158

157

156

153

152

154

151

157

156

153 155

M902

159

178

176

174

173

172

177

160

161

169

175

177

170

167

168

171

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

M901 A-3291-665-A MOTOR ASSY, MAIN (CAPSTAN/REEL) 151 X-3371-710-1 CHASSIS (S) ASSY 152 3-933-337-01 SPRING (B-T-R), CONE COIL 153 3-701-437-01 POLY-SLIDER (A) 154 3-933-333-01 GEAR (LDG-E) 155 3-933-339-01 SPRING (B-T-F), CONE COIL

156 3-933-345-01 GEAR, REEL 157 3-954-807-01 WASHER 158 1-660-169-21 REEL BOARD 159 3-341-752-11 WASHER, POLYETHYLENE 160 3-933-336-01 SPRING (ARM HANGER), TENSION

161 3-928-669-01 LEVER (PINCH SELECTION) 162 3-928-668-01 LEVER (MODE) 163 3-933-338-01 SCREW (HP), STEP 164 3-927-100-01 SCREW (+PS 2X10), SPECIAL 165 3-928-670-01 SPRING (PINCH PRESS)

* 166 X-3371-712-1 PLATE SUB ASSY, HEAD

167 3-364-151-01 WASHER

* 168 X-3371-701-1 CHASSIS (M) SUB ASSY (A)

169 X-3371-707-1 CLUTCH (PLAY) ASSY 170 3-701-437-21 WASHER 171 3-930-932-01 FLYWHEEL (F) (SEF)

172 A-3291-667-A CLUTCH (FR) ASSY 173 3-321-813-01 WASHER, COTTER POLYETHYLENE 174 3-933-343-01 GEAR (REVERSE) 175 3-933-383-01 SEAL (32), REFLECTION 176 X-3371-703-1 LEVER (GEAR) ASSY

177 X-3371-713-2 LEVER (PINCH) ASSY 178 X-3371-706-2 ARM (HANGER) ASSY HP901 1-500-157-21 HEAD, MAGNETIC (PLAYBACK) M902 A-3291-664-A MOTOR ASSY, SUB

(LOADING/TAPE OPERATION)

S901 1-692-885-11 SWITCH, ROTARY SLIDE (TAPE OPERATION)

– 5 –

+ 9 hidden pages