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— 17 —

7

 Slider (L)

3

 Slider (R)

 Loading chassis

2

 Side cover (R)

4

 Gear (C)

!™

 Drive assy

9

 Ditection lever

8

 Gear (C)

6

 Side cover (L)

!¡

 Screws

      (+BVTP 3 

×

 10)

1

 Screws

     (+BVTP 3 

×

 10)

5

 Screws

     (+BVTP 3 

×

 10)

0

 Screws

      (+BVTP 3 

×

 10)

 

6

 Connector (CN 703)

3

 RELAY board

4

 Wire (flat type) 21P

5

 SLIDE FLEXIBLE board

1

 Screws

    (+BTP 2.6 

×

 8)

CD tray (BOTTOM)

2

 CD tray (TOP)

7

 Connector (CN 704)

8

 Connector (CN 702)

— 18 —

Insert a CD into ZS-D7.  Remove the power cord.
While the power cord is removed, and while pressing the
ENTER key and the CD STOP key, connect the power cord to
wall outlet.  The ZS-D7 enters the test mode.

The default display appears as shown.
Press the PLAY key to start rotating CD and press the PLAY
key again to hear the CD music.
When you want to enter the automatic adjustment mode, press
the ENTER key.  The display values change in the automatic
adjustment mode, but have no actual effects on operation.
Turn off the main power to exit the test mode.

After completing the step 1 automatic adjustment, enter the test
mode then the PLAY state.
Measurement Point
MAIN board : TP1 (MAIN board C-12.  See page 26.)
(Confirm by oscilloscope)
Confirm that jitter is 9.0 ns or less.  Confirm also that the RF
level is from 0.9 to 1.3 Vp-p.

* Measurement Point: TP2 (MAIN board C-12.  See page 26.)
(Confirm by oscilloscope)
From the condition of above step 2, press the FF or FR key.
Check that the traverse level is from 300 mVp-p to 500 mVp-p

.

1.

Clean the following parts with a denatured-alchool-moistened
swab:

record/playback head

pinch roller

erase head

rubber belts

capstans

2.

Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head demagnetizer close to
the erase head.)

3.

Do not use a magnetized screwdriver for the adjustments.

4.

After the adjustments, apply suitable locking compound to the
parts adjusted.

Meter Reading

30 to 80 g

•

cm

(0.42 to 1.12 oz

•

inch)

2 to 10 g

•

cm

(0.028 to 0.14 oz

•

inch)

30 to 80 g

•

cm

(0.42 to 1.12 oz

•

inch)

2 to 10 g

•

cm

(0.028 to 0.14 oz

•

inch)

70 to 200 g

•

cm

(0.98 to 2.8 oz

•

inch)

Mode

FWD

FWD

back tension

REV

REW

back tension

FF • REW

Torque Meter

CQ-102C

CQ-102RC

CQ-201B

Meter Reading

more than 70g

•

cm

(more than 0.97 oz • inch)

more than 70g

•

cm

(more than 0.97 oz • inch)

Mode

FWD

REV

Torque Meter

CQ-403A

CQ-403R

— 19 —

0 dB = 0.775V

1.  Adjustments should be performed in the test mode.
2.  Demagnetize the record/playback head with a head

demagnetizer.

3. Do not use a magnetized screwdriver for the adjustment.
4. Lock the adjustment parts/components with locking agent such

as Neji-lock after adjustments are completed.

5. Perform adjustments under the specified voltage unless

otherwise specified.

6. Perform adjustments in the order given.  (Perform the playback

circuit first then adjust the recording circuit, in principle.)

7. Adjustments should be performed for both L-channel and R-

channel.

10 k

Ω

0.436 V (–5 dB)

Signal source impedance

Input signal level

P-4-A100J

WS-48A

REC/PB/ERASE Head azimuth
and phase adjustment.

Tape speed adjustment

10 kHz, -10 dB

3 kHz, 0 dB

Load impedance

Output signal level

47 k

Ω

0.25 V (–9.8 dB)

Mode :

 FWD playback

1.

Press the TAPE ”  Key to enter the playback mode.

2.

Adjust the variable resistor of the motor (M691) so that the
frequency counter reading is from 2,985 to 3,015 Hz.

3.

Confirm that the tape speed difference between the tape top
and end is within 1.5 %.

• Perform adjustment after head has changed the tape

running direction. (When head is in the FWD direction
position, start adjustment in the REV mode.

• Adjustment must be completed by cw turning of

adjustment screw.

• After the adjustment, lock the screws with locking

compound.

Procedure:
1.

Mode : REV playback

2.

Turn the adjustment screw for the maximum output levels. If
these levels at L-ch and R-ch do not match, turn the adjustment
screw until both of output levels match together within 1 dB.

— 20 —

3.

Phase Check
Mode : REV playback

4.

Perform the above steps 1 through 3.

5.

Confirm that the phase difference between L-ch and R-ch is in
the range from 0˚ to 90˚.

[Switch and knob position]
• Function mode: RADIO
• VOLUME: mechanical center

•

Repeat the proceduresin each adjustment several times for the
maximum level meter indication.

•

The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.

AEP/UK model

LW RECEPTION FREQUENCY COVERAGE CHECK

Frequency indication

153 kHz

279 kHz

Digital voltmeter reading

0.6 to 0.7 V

4.7 to 5.7 V

Adjustment

CT4

check

(     ) : US/Canadian model

MW/AM TRACKING ADJUSTMENT

Adjust for a maximum defection of level meter.

CT2

CT5

621 kHz (620 kHz)

1,404 kHz (1,400 kHz)

(     ) : US/Canadian model

MW/AM RECEPTION FREQUENCY COVERAGE CHECK

Frequency indication

531 kHz

1,611 kHz

(530 kHz)

(1,710 kHZ)

Digital voltmeter reading

0.8 to 1.2 V

4.7 to 5.7 V

(0.9 to 1.1 V)

(5.4 to 6.4 V)

Adjustment

L3

check

0 dB = 1 µV

Adjustment screw
(FWD)

Adjustment screw
(REV)