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MICROFILM

Model Name Using Similar Mechanism

XR-1750

Tape Transport Mechanism Type

MG-52A-135

•

XR-T200 are almost same as XR-1750.
Printed wiring boards, schematic diagram, exploded views
and electrical parts list are described in this service manual.
Please refer to XR-1750 service manual previously issued
for the other informations.

................................................ 2

2-1. IC Pin Function Description ........................................... 6
2-2. Printed Wiring Boards –MAIN Section– ....................... 8
2-3. Schematic Diagram  –MAIN Section– ........................... 11
2-4. Printed Wiring Board  –CONTROL Section– ................ 15
2-5. Schematic Diagram  –CONTROL Section– ................... 17

............................... 19

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.

– 2 –

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

•

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.

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

* 1

X-3373-606-1 CHASSIS ASSY

* 2

3-012-600-01 INSULATOR

* 3

A-3313-260-A MAIN BOARD, COMPLETE

4

3-915-923-01 SCREW, GROUND POINT

* 5

3-012-565-01 COVER

6

1-777-184-11 CORD (WITH CONNECTOR)

* 7

3-012-598-01 BRACKET (IC)

* 8

3-012-599-01 HEAT SINK

9

3-937-650-01 PLATE (C), GROUND

10

3-934-325-01 SCREW, +K (5X8) TAPPING

11

3-935-568-01 BRACKET (LOCK)

12

9-911-840-XX CUSHION (U)

* 13

3-014-628-01 CHASSIS, FRONT

F901

1-533-330-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A)

not
supplied

MG-52A-135

#1

#1

Front panel ass'y

#1

F901

#2

#2

#2

#4

– 3 –

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

51

3-009-301-01 BUTTON (BASS)

53

3-009-299-01 BUTTON (L) (2) (+.–)

55

3-012-576-01 BUTTON (RESET)

56

3-009-300-01 BUTTON (SOURCE)

57

3-009-297-01 BUTTON (L)  (

r. OFF. + + ). .

SEEK AMS. 

= 0 –. SEL. MUTE)

58

3-009-308-01 BUTTON (1-3) (

6. 1. 2. 3)

59

3-009-309-11 BUTTON (4-6) (4. 5. 6)

60

3-009-313-01 BUTTON (R) (S) (BTM. LCL. 

r)

61

3-932-205-81 DOOR, CASSETTE

62

3-935-003-01 SPRING, TORSION

* 63

3-010-282-01 PLATE (LCD), GROUND

* 64

3-012-669-01 SHEET (REFLECTOR)

* 65

3-009-302-01 PLATE (LCD), LIGHT GUIDE

* 66

3-009-303-02 HOLDER (LCD)

* 67

A-3294-317-A CONTROL BOARD, COMPLETE

68

X-3374-314-1 PANEL SUB ASSY

LCD901 1-801-678-11 DISPLAY PANEL, LIQUID CRYSTAL
PL901

1-517-567-11 LAMP, PILOT

PL902

1-517-567-11 LAMP, PILOT

not supplied

#3

#3

PL902

LCD901

PL901

– 4 –

Ref. No.

Part No.

Description

Remark

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

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)

M901

A-3291-665-A MOTOR ASSY, MAIN (CAPSTAN/REEL)

A

M901

A

#

6

#7