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This is a very good quality print (scan) of the original SONY service manual. The original from Sony is on very thin paper. Nevertheless it is very clear and sharp and excellent readable. I'm very satisfied to have now this rare document. I've looking for it many years (infrequent). It contains very detailed circuit diagrams, exploded views, part lists, PCB view with good readable connection lines. Very recommended.
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A complete manual with all the needed details of calibrations and service instructions about the radio receiver.
A big deal.
Many thanks !
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Fast delivery and good quality copy. To be recommended
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Excellent product, very clear print. Detailed circuit and assembly diagrams - this enabled me to repair my CD player with confidence. I highly recommend this site.
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Fast access, 100% correct and complete service manual
SERVICE INFORMATION
� HR 7725 � The blender coupling on the motor shaft has been
A separate drawing shows how to disconnect the speed selection knob.
provided with the customary left-hand thread. The drive coupling (item 11) can be detached by means of a hammer and a screwdriver. Strike the screwdriver with a short sharp blow and remove the drive coupling. Or block the acc. drive wheel (item 23) and thereby the rotor shaft, by sticking a pin through the hole (5 mm dia.) in the bottom plate.
� The top housing (item 29) can be removed by
� HR 7727
First remove the pulse button (marked �M�) as shown in the figure. Then unlock two snap connections to remove the variomatic knob from the top housing.
detaching the snap connections by sticking a pin (or a screwdriver) through the small round holes (3 mm dia.) in the bottom plate (item 27) and the housing (item 12). The arrows in the drawing show the locations of the holes. In order to replace the speed selection or variomatic � knob, the locking lever (item 33) must be placed in its lowest position.
� The minimum speed of the HR 7727 can be set when
1 2
the pulse button (the button marked with an �M�) is not mounted. The minimum speed (rpm) has been correctly set if the motor starts automatically and continues to run smoothly with the variomatic knob and the adjustable potentiometer in the lowest setting. � The accessory drive shaft (item 15) has a locking piece (item 14).
� The assembly of the accessories depends on the
1
� HR 7727
national version.
� For specific versions, the component configuration may
Remove the Poti gear (item 32) by turning it clockwise until the arrows face each other.
differ from the one shown on the exploded view. However, the actual components can be distinguished by their code numbers.
� Make sure that all functions, including the safety
devices, are working correctly after you have completed the repair.
brown R L2 Speed High and Pulse
M1 D1 1N5406
red
F1
Speed Low MAINS R1 470k N L1 C1
F2
brown F1
BF white Rotor B yellow
black blue N1 violet
F2 N
Change-over switch in braking position
HR 7725
Pulse brown R R4 470k R1 470k Q2 On/Off blue N R5 1M C2 68nF L1 N1 L3 R2 1M R3 27k F2 brown F1 M red F1
DAP0535
BF white Rotor
MAINS
C1
Q1
black violet
F2 N
B yellow
Change-over switch in braking position
HR 7727
DAP0536
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