DOWNLOAD Sony SLV-798HF / SLV-998HF Service Manual ↓ Size: 6.91 MB | Pages: 82 in PDF or view online for FREE

— 5 —

2-4-2. SYNC AGC Check (MA-318 Board) ······························ 6-4
2-4-3. Recording Y Level Check (MA-318 Board) ··················· 6-4
2-4-4. Recording Chroma Level Check (MA-318 Board) ········· 6-5
2-4-5. Playback Level Check (MA-318 Board) ························· 6-5
2-5.

AUDIO SYSTEM ADJUSTMENT ································· 6-5

2-5-1. ACE Head Adjustment ···················································· 6-5
2-5-2. E-E Output Level Check ················································· 6-5
2-5-3. Overall Output Level and Distortion Factor Check ········· 6-6
2-5-4. Overall Noise Level Check ·············································· 6-6
2-6.

TUNER SYSTEM ADJUSTMENT ································ 6-6

2-6-1. Separation Adjustment (MA-318 Board) ························ 6-6
2-7.

ADJUSTING PARTS LOCATION DIAGRAM ············· 6-8

7-1.

EXPLODED VIEWS ······················································ 7-1

7-1-1. FRONT PANEL ASSEMBLY AND UPPER CASE

SECTION ········································································ 7-1

7-1-2. CHASSIS SECTION ······················································· 7-2
7-1-3. MECHANISM DECK-1 ················································· 7-3
7-1-4. MECHANISM DECK-2 ················································· 7-4
7-1-5. MECHANISM DECK-3 ················································· 7-5
7-2.

ELECTRICAL PARTS LIST ·········································· 7-6

— 6 —

• Error codes are indicated using the lower 5 digits in the fluorescent display tube.

“At this time, Colon “:” between character is not indicated.”

ERROR CODE

MODE CODE

0

Power-on eject

10 FWD x1

20 REW play

1

Power-on initial

11 FWD x2

21 Cas. loading

2

Power-off eject

12 CUE

22 Tape loading

3

Power-off stop

13 PB-pause

23 Power-off loading

4

FF

14 RVS-pause

24 Mecha. error (Power on)

5

REW

15 RVS x1

25 Power-on eject initial

6

REC

16 RVS x2

26 Power-off eject initial

7

REC- pause

17 REV

27 APC REC

8

Power-on stop

18 Power-off initial

28 Cas. loading

9

PB

19 Mecha. error (Power off)

(No auto PB check)

0

No error

1

Cam encoder error   Loading direction

2

Cam encoder error   Unloading direction

3

T reel error

4

S reel error

5

Capstan error

6

Drum error

7

Error on initializing

8

Cassette loading error

9

Reserve

Mode code indication when the error has occurred.

Error code

— 7 —

See below for note.

1)

Remove screw 1 (+P3 

×

 8) and remove the ground shaft

assembly 2. (Refer to Fig. 4.)

2)

Remove soldering which is marked by arrow and remove the
rotary upper drum board completely.

3)

Remove two screws 3 (PSW3 

×

 8) and remove the rotary

upper drum in the direction of A. (Refer to Fig. 5.)
If removal is difficult, remove it while rotating it slowly.

Note:

If removal is difficult, check again if soldering is removed
completely.

Fig. 4

1)

Pay attention so that finger print or like must not be put when
inserting a new upper drum into lower drum.

2)

Align  mark of the rotary upper drum board with the  mark of
the rotary transformer board so that the screw hole on the upper
drum and that on the lower drum are aligned. (Refer to Fig. 5.)

3)

If attaching is difficult, attach a upper drum while rotating it
slowly.

Note:

Pay attention not to damage the video heads.
Confirm that the upper drum is inserted completely.

4)

Tighten the two screws 3 (PSW3 

×

 8). (Refer to Fig. 5.)

5)

Fix the earth shaft 2 by tightening the screw 1 (+P3 

×

 8) so

that protrusion at the tip of the earth shaft contacts the center
of the drum shaft.

Note:

When attaching the ground shaft assembly 2, never give

force to the plate spring 4.

Fig. 5

1

 Screw (+P3 

×

 8)

2

 Ground shaft assembly

Drum when viewed 
from the top

Soldering

4

 Plate 

     spring

Soldering

3

 PSW3 

×

 8

Upper drum assembly
DZR-51-R (8-848-594-02) 
                 (998HF)
DZR-45-R (8-848-576-02) 
                 (EXCEPT 998HF)

Align the two arrow marks.

A

Lower drum assembly 
DZL-51B/J-RP (8-848-666-11)

Note : There are two types of drum assembly built in models.

There are two printed circuit boards 
on the top.

UPPER DRUM ASSEMBLY

DZR-51-R (998HF)

(8-848-594-02)

DZR-45-R (Except 998HF)

(8-848-576-02)

There is no printed circuit board.

DRUM ASSEMBLY

DZH-96A-R (998HF)

(8-839-046-02)

DZH-94A/Z-RP (Except 998HF)

(8-839-044-02)

It cannot be divided to two parts, the upper and
the lower drum assemblies.

1-1

This section is extracted from the
SLV-998HF instruction manual.