DOWNLOAD Sony HCD-DR7AV / HCD-XB800AV / LBT-DR7AVS Service Manual ↓ Size: 9.81 MB | Pages: 90 in PDF or view online for FREE

– 13 –

• This mode is used for checking the AMS operations of the tape deck.

JIG
7-819-039-12 Alignment tape, AMS-110A

Procedure:
1. Press the  

1/u  button to turn the set ON.

2. Set the tape (AMS-110A).
3. Press the three buttons  

t/CLOCK SET  ,  ENTER  , and  DISC 3  button simultaneously.

4. “TEST MODE” is displayed on the fluorescent display tube.
5. Press the  FUNCTION  button and switch the function to the deck with the tape (AMS-110A).
6. Press the  CD SYNCHRO  button. “AMS CHECK” is displayed on the fluorescent display tube and the tape is rewound.
7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8.

“NG” is displayed at other times, and the deck stops.

8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK” is displayed.

“NG” is displayed at other times.

During the aging mode, both the CD player and tape deck are executed together.
• If an error occurs:
Aging stops, and the error state is displayed on the fluorescent display tube.
• If no error occurs:
Aging is repeated.

Procedure:
1. Press the  

1/u  button to turn the set ON.

2. Load 10 minute tapes with unbent rec-proof tabs in decks A and B.
3. Set CDs on the DISC 1 and DISC 4 tables.
4. Set the CD mode REPEAT to OFF and PLAY MODE to ALL DISCS.

(Press the  PLAY MODE  and  REPEAT  buttons to set these modes.)

5. Press the  FUNCTION  button to switch the function to “CD”.
6. Press the three buttons   

t/CLOCK SET  ,  ENTER  , and  DISC 4  button simultaneously.

7. Aging starts.
8. To end aging, press the  

1/u  button to turn the set OFF.

Aging Sequence:
Aging is performed in the following sequence.

• Tape Deck
1. The tape in deck A is rewound. “TAPE A AG-1” is displayed.
2. The FWD side of deck A is played for two minutes.

“TAPE A AG-2” is displayed.

3. The tape in deck A is fast forwarded. “TAPE A AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.
4. The RVS side of deck A is played for two minutes.

“TAPE A AG-4” is displayed.

5. The tape in deck A is rewound. “TAPE A AG-5” is displayed.
6. The FWD side of deck B is played for two minutes.

“TAPE B AG-2” is displayed.

7. The tape in deck B is fast forwarded. “TAPE B AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.
8. The RVS side of deck B is played for two minutes.

“TAPE B AG-4” is displayed.

9. The tape in deck A is rewound. “TAPE A AG-5” is displayed.
10. Repeated from step 2.

• CD
1. The tray rotates.
2. DISC 1 is chucked.
3. The TOC is read.
4. The first track is played for 2 seconds.
5. The last track is played for 2 seconds.
6. The tray rotates.
7. DISC 4 is chucked.
8. The TOC is read.
9. The first track is played for 2 seconds.
10. The last track is played for 2 seconds.
11. Repeated from step 1.

– 14 –

• Display when ended abnormally
When the tape deck is abnormal:

The state when ended abnormally is displayed.
The contents of display are the same as that during aging.

A message indicating that errors such as “CD MEC ERR” have occurred.
Check the error contents in the following error history display mode.

Mode which enables the history of error occurring in the CD player to be checked.
Execute this mode after ending the aging mode.

Procedure:
1. Press the  

1/u  button to turn the set ON.

2. Press the three buttons   

t/CLOCK SET  ,  ENTER  , and  CD SYNCHRO  simultaneously.

3. A message such as “EMC@@EDC**” is displayed.

@@ : Number of mechanical errors (Up to three past errors)
**

: Number of errors (NO DISC ERROR) which occurs after chucking (Up to three past errors)

4. When checking the history of mechanical errors, press the  PLAY MODE  button. When checking errors after chucking, press the

REPEAT  button to switch the display.

5. Press the  

1/u  button to end and turn the set OFF.

6. To erase the error history, perform COLD reset.

(Press the three buttons   

t/CLOCK SET  ,  ENTER  , and  DISC 1  simultaneously.

• Viewing the mechanical error history display

(Switch the history by pressing the  PLAY MODE  button.)

Display
  E@@M#*****

@@ : Error number. 00 is the newest.

#

: Operating state of table

0

: Currently in the INITIAL mode

7

: Currently rotating to the right

8

: Currently rotating to the left

A

: Currently chucking down

B

: Currently chucking up

*

: Invalid

• Viewing the NO DISC ERROR history display

(Switch the history by pressing the  REPEAT  button.)

Display
  E@@D##$$%*

@@ : Error number. 00 is the newest

##

: Error contents

01: Focus error
02: GFS error
03: Setup error

$$

: Retries

00: NO DISC is determined without attempting chucking

retry

02: NO DISC is determined after chucking retry.

%

: State when determined as NO DISC

1

: When stopped

2

: At setup

3

: At TOC READ

4

: When accessing

5

: When playing

6

: When pausing

7

: When manual searching (during play)

8

: When manual searching (during pausing)

*

: Invalid

– 15 –

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 demagne-

tizer.

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 sup-

ply voltage unless otherwise noted.

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

100 g or more

(3.53 oz or more)

100 g or more

(3.53 oz or more)

Note: Perform this adjustments for both decks.

Procedure:
1. Mode : Playback

Signal

Used for

Tape

Mode

FWD

Torque meter

CQ-102C

Meter reading

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

1. Demagnetize the record/playback head with a head damagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the

parts adjusted.

4. The adjustments should be performed with the rated power sup-

ply 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 adjust-
ment.)

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.

P-4-A100

WS-48B

P-4-L300

10 kHz, –10 dB

3 kHz, 0 dB

315 Hz, 0 dB

Azimuth Adjustment

Tape Speed Adjustment

Level Adjustment

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 1 dB of peak.

test tape
P-4-A100
(10kHz, –10dB)

MD OUT

level meter

set

+

–

L-CH
peak

R-CH
peak

screw
position

output
level

within
1 dB

L-CH
peak

R-CH
peak

screw
position

within 1dB

– 16 –

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

parts adjusted.

Adjustment Location: Playback Head (Deck A)

Record/Playback/Erase Head (Deck B)

3. Mode: Playback

Note: Set the test mode using the following method and begin tape

speed adjustment.
In the test mode, the speed will switch to double speed or
normal speed each time the  HI-SPEED DUB  button is pressed.

Procedure:
With the power turned ON, press the 

t/CLOCK SET  button,

ENTER  button, and  DISC 3  button simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the  

1/u  button.

1. Insert the WS-48B into deck B.
2. Press the  

·  button of deck B.

3. Press the  HI-SPEED DUB  button and play the tape at double speed.
4. Adjust RV1001 of the LEAF SW board so that the reading of

the frequency counter becomes 6000 ± 180 Hz.

5. Press the  HI-SPEED DUB  button and play the tape at normal speed.
6. Adjust RV1002 of the LEAF SW board so that the reading of

the frequency counter becomes 3000 ± 90 Hz.

Adjustment Location: LEAF SW board

W.RMS (JIS) less than 0.3%
(test tape: WS-48B)

Procedure:
Mode: Playback

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.

Adjustment level:
CN301 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels: within ± 0.5 dB
Adjustment Location: AUDIO board

test tape
P-4-A100
(10kHz, –10dB)

oscilloscope

set

Waveform of oscilloscope

in phase

45

°

90

°

135

°

180

°

good

wrong

MD OUT

Reverse

Foward

Remove the cassette lid.

test tape 
P-4-L300
(315Hz, 0dB)

level meter

set

MD OUT

RV1002

RV1001

RV1002(Normal Speed)

RV1001(High Speed)