Technics SC-CH570 Service Manual

RS-CH770
m@ Service Mode Function of Cassette Mechanism
This
unit
is
equipped
with
a
service
mode
function
of
cassette
mechanism
using
the
LED
indicators
[R.
PLAY
(««),
F.
PLAY
(p)]
and
cassette
holder
illuminations
[DECK
1,
DECK
2].
Use
this
function
during
maintenance
to
check
faults
of
the
items
below.
© Cassette tapes to be prepared
Metal tape: | Recorded music tape with only one erase-prevention tab intact (use middle portion
of tape).
Normal tape: } Recorded music tape with both erase-prevention tabs intact (use middle portion of
CrO2 tape: } tape).
®@ Selecting Service Mode
1. Turn on the power to the unit. (If RS-CH770 unit is removed from system, turn it on according
to the procedure on page 15.)
2. Check that no tape is inserted in the cassette deck. STOP DOLBY NR
Press
the
DOLBY
NR
button
for
about
2
seconds,
and
keep
pressing
it,
also
press
the
STOP
Lal
Qo
button for about 2 seconds. (Service mode cannot be selected with a tape inserted in the
cassette deck.)
3. The LED indicator for REC PAUSE flashes, the service mode has been activated.
@ Deck 1 Mechanism Check
st
Bw
—
Use
the
Deck
1/2
select
Open
the
Deck
1
Insert
a
CrO2
tape
into
Press
the
TPS >>
button
to
change
the
cassette
holder.
the
Deck
1
and
close
button.
(Tape
fast
flashing
Deck
2
(OPEN
button)
the
cassette
holder.
forwards
for about
2
indicator to Deck 1.
(No change required if [——>
Deck 1 indicator
already flashing.)
DECK 1/2
seconds then stops.)
BIS G) as,
ae ee
4 OPEN
Press the << TPS Press the PLAY button.
button. (Tape rewinds (After TPS operation
for about 2 seconds and check, the tape
then stops.) >| stops.)
Open the Deck 1
cassette holder and
replace the tape with a Close the Deck 1
normal tape. cassette holder.
(OPEN button)
4 OPEN
Press the REC/PAUSE Press the STOP button. Fault items 1 to 7 can be checked as
button. (No record the four LED indicators turn on or off. (Refer to Table 1.)
operation.) p| Each time the STOP button is pressed, the fault items are
displayed in sequence.
@REC PAUSE
* If no fault, all indicators go out.
243

Technics SC-CH570 Specifications

General

Brand	Technics
Model	SC-CH570
Category	Stereo System
Language	English