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33

1. Clean the following parts with a denatured alcohol-moistened

swab:

record/playback heads

pinch rollers

erase head

rubber belts

capstan

idlers

2. Demagnetize the record/playback head with a head

demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the

parts adjusted.

5. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

3.06 N • m to 6.96 N • m

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

3.06 N • m to 6.96 N • m

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

6.96 N • m to 14.02 N • m

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

9.80 N • m

100 g or more

(3.53 oz or more)

9.80 N • m

100 g or more

(3.53 oz or more)

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

34

0 dB=0.775 V

1. Demagnetize the record/playback head with a head

demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the

parts adjust.

4. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this

service manual.  (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)

6. The adjustments should be performed for both L-CH and R-

CH.

7. Switches and controls should be set as follows unless otherwise

specified.

• Test Tape

 Perform this adjustments for both decks

Procedure:
1. Mode:  Playback

P-4-A063

6.3 kHz, –10 dB

Azimuth Adjustment

set

MAIN board
IC101
Pin 28 (L-CH)
Pin 37 (R-CH)

MAIN board
IC101
Pin 38 (GND)

+

–

level meter

test tape
P-4-A063
(6.3 kHz, –10 dB)

oscilloscope

set

J802
VIDEO OUTPUT

75 

Ω

1.00 

±

 0.05 Vp-p

(WHITE 100%)

Purpose
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.

Procedure:
1. Connect oscilloscope to VIDEO output.
2. Load a DVD reference disc playback.
3. Check the video signal level is 1.00

±0.05Vp-p.

About the dicision to pass or fail of the optical pick-up block, refer
to “DICISION TO PASS OR FAIL OF THE OPTICAL PICK-UP
BLOCK” (see page 8)

Use the following test disc on test mode.
LUV-P01 (CD):

PART No. 4-999-032-01

TDV-520CSO (DVD-SL): PART No. J-2501-236-A
TDV-540C (DVD-DL):

PART No. J-2501-235-A

 Do not use exiting test disc for DVD.

After parts related to the servo circuit (RF amplifier (IC001), DSP
(IC509), motor driver (IC501), EEPROM (IC903) so on) are
replaced, re-adjusting the servo circuit is necessary. Select “ALL”
at  “1. DRIVE AUTO ADJUSTMENT” (Refer to page 8 in TEST
MODE) and adjust DVD-SL (single layer), CD and DVD-DL (dual
layer).

35

2. Turn the adjustment screw and check output peaks. If the peaks

do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.

3. Mode:  Playback

4. After the adjustments, apply suitable locking compound to the

pats adjusted.

screw
position

L-CH
peak

within
1dB

output
level

L-CH
peak

R-CH
peak

within
1dB

screw
position

R-CH
peak

MAIN
board
IC101

test tape
P-4-A063
(6.3 kHz, –10 dB)

pin 37

oscilloscope

L-CH

R-CH

V

H

waveform of oscilloscope

in phase 45

°

90

°

135

°

180

°

good

wrong

pin 38

pin 28

L

R

reverse

forward

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

36

Pin No.

Pin Name

I/O

Pin Description

1, 2

D5, D6

I/O

Two-way data bus signal input from/output to mechanism control IC.

3

VSS

—

Ground pin

4

D7

I/O

Two-way data bus signal input from/output to mechanism control IC.

5

A0

I/O

Address signal input from/output to mechanism control IC.

6

VDD

—

Power supply pin (+3.2 V)

7

A1

I/O

Address signal input from/output to mechanism control IC.

8

VDD5V

—

Power supply pin (+5 V)

9 to 14

A2 to A7

I/O

Address signal input from/output to mechanism control IC.

15

VSS

—

Ground pin

16

XWAIT

O

Not used in this set. (Open)

17

XRD

I

Read strobe signal input from mechanism control IC.

18

XWR

I

Write strobe signal input from mechanism control IC.

19

XCS

I

Chip select signal input from mechanism control IC.

20, 21

XINT0, XINT1

O

Interrupt signal output to mechanism control IC.

22

VDD

—

Power supply pin (+3.2 V)

23

XHRS

I

Not used in this set. (Open)

24

HDB7

I/O

Stream data input from/output to DVD system processor IC.

25

VSS

—

Ground pin

26

HDB8

I/O

Error flag signal input from/output to DVD system processor IC.

27

HDB6

I/O

Stream data input from/output to DVD system processor IC.

28

VDDS

—

Power supply pin (+5 V)

29

HDB9

I/O

Not used in this set. (Open)

30

HDB5

I/O

Stream data input from/output to DVD system processor IC.

31

HDBA

I/O

Not used in this set. (Open)

32

HDB4

I/O

Stream data input from/output to DVD system processor IC.

33

VSS

—

Ground pin

34

HDBB

I/O

Not used in this set. (Open)

35

HDB3

I/O

Stream data input from/output to DVD system processor IC.

36

VDD

—

Power supply pin (+3.2 V)

37

HDBC

I/O

Not used in this set. (Open)

38

VDDS

—

Power supply pin (+5 V)

39

HDB2

I/O

Stream data input from/output to DVD system processor IC.

40

HDBD

I/O

Not used in this set. (Open)

41

HDB1

I/O

Stream data input from/output to DVD system processor IC.

42

VSS

—

Ground pin

43

HDBE

I/O

Not used in this set. (Open)

44

HDBO

I/O

Stream data input from/output to DVD system processor IC.

45

HDBF

I/O

Not used in this set. (Open)

46

HDRQ

O

Serial data effect flag signal output to DVD system processor IC.

47

VDDS

—

Power supply pin (+5 V)

48

XHWR

I

Serial data transfer clock signal input from DVD system processor IC.

49

XHRD

I

Not used in this set. (Open)

50

VDD

—

Power supply pin (+3.2 V)

51

REDY

O

Not used in this set. (Open)

52

VSS

—

Ground pin

53

XHAC

I

Serial data request signal input from DVD system processor IC. (DVD mode)

54

HINT

I/O

Not used in this set. (Fixed at H.)

55

XS16

I

Not used in this set. (Fixed at H.)

56

HA1

I

Not used in this set. (Fixed at H.)

57

XPDI

I/O

Not used in this set. (Fixed at H.)

58

VDDS

—

Power supply pin (+5 V)