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e Removing the intermediate plate assembly (M60)
i) Remove three black screws (A) first, then remove the lower plate assembly (M66) and ewiich angle (M9).
Remove them while holding down the REW button assembly (M64) to prevent the FF/REW button spring
(M21) from popping out. (Refer to Fig. 1, 2 and 3.)
INTERMEDIATE PLATE ASSEMBLY (M60)
ii) Remove the FF/REW button spring and the REW button.
=
iii) Remove the erase safety lever spring (M20) from the erase safety
lever (M2). (Refer to Fig. 4.)
iv) Remove the flywheel assembly (M12). (Refer to Fig. 3).
v) Remove five screws (B), the playback rod spring (M16), and counter
belt (M79).
The intermediate plate assembly can be removed from
the mechanism
unit.
vi) When assembling the intermediate plate assembly, assemble the
cue lever (M8) parallel to the edge of the main base plate.
Before
securing it with screws, insert the erase safety lever spring. (Refer
to Fig. 4.)
LOWER PLATE
ITCH
AN NGLE (M9)
ASSEMBLY (M66) _ Fig. 2
PLAYBACK _ INTERMEDIATE
PLAYBACK
ROD SPRING
PLATE
BUTTON
—_ (M16)
ASSEMBLY
REW BUTTON
ASSEMBLY
SAFETY
LEVER
COUNTER
(M2)
BELT (M79)
FLYWHEEL ASSEMBLY
(M12)
Fig. 3
MEASUREMENT AND ADJUSTMENT METHODS
NOTES: Keep good condition, set switch buttons and controls in the following positions, unless otherwise specified.
e Make sure heads are clean.
e Volume control: Set to 8.
e Make sure capstan and pressure roller are clean.
e Speed control: OFF
e Judgeable room temperature: 20+5°C (68+9°F)
¢ Voice operation: OFF
Ad
Tape
speed
accuracy
Tape
speed
accuracy
Record/playback head
Monitor jack
=
adjustment
. Test equipment connection is shown in fig. 1.
|
(LL)
Secunia
_ Playback test tape (QZZCWAT 3,000Hz), and
om
p> Ere Oo
,
supply playback signal to frequency counter.
Playback mode
* Playback mode
;
.
. Take
measurement
at middle
section
of test
Digital
Equipment:
tape.
electronic counter
f—3,000
* Test tape...QZZCWAT
Tape speed accuracy =
—3 000 -* 10° (%)
where, f= measured value
* Resistor (8Q)
Standard value: +2.5% (f = 2,925—3,075Hz)
|
. If measured value is not within standard, adjust VR201
(shown in circuit boards and
wiring connection diagram), so that frequency becomes 3,000 Hz.
©
Adjusting the
Checks after motor replacement
governor circuit
1. After replacing the motor, playback
the test tape (QZZCWAT) and listen to the reproduc-
(u adjustment)
ed sound.
* Playback mode
(ERD10TJ1R5).
. Playback the test tape (QZZCWAT)
and check that the reproduced
sound
does
not
fluctuate.
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