Philips HR 7717, HR 7715 Service Manual

Use Service Manual 4822 729 21717
Electronic circuit / Switch bracket / Housing Items 9 / 8 / 4

1997-04-01

HR7715
HR7717

DAP144

MSH-coding 8837 715 00000

8837 717 00000

Alterations:

From serial number 7014 on, the Off and Pulse functions were separated and thus the
following alterations took place:

Item 9 Electronic circuit: a third micro-switch was added on the board. 4822 214 12271
Item 8 Switch braket: it was added another driving flap for the third micro-switch. 4822 464 10292
Item 4 Housing: the panel was modified with the creation of the Pulse switch. 4822 441 11984

Former situation Current situation

W15

W11

W12

W15

W11

W12

Item 9

+

ON

OFF

PULSE

+

ON

OFF

PULSE

O/M I

Item 8

Item 4

O

M

PCS 88 424 4822 729 21804

I

Interchangeability:

Only the modified parts (current situation) will be available as spare parts and in
order to use them in old sets the following changes must be made:

Electronic circuit:
(item 9)

Switch braket:
(item 8)

Housing
(item 4)

On the copper side (opposite side to the one
shown in the figure):
– Using a flexible wire, make a jumper

between the inner contacts of the Off and
Pulse micro-switchs (detail A).

()

– Using solder, make a jumper between the

points indicated in detail B.

()

B

PULSE

C

On the component side (as shown in the

()

figure):
– Remove the transistor (detail C), cutting its

A

OFF

+

3 terminals off.

ON

Total interchangeable.

W12

W11

Not interchangeable. It can only be used in old sets (serial numbers up to 6523) if
the electronic circuit and the switch bracket are also replaced.

W15