Panasonic sa ht 75 g service manual

Page 2

|sA+n75cc / SA-HTISGCS l sun-[son 1 SA-HTISGCP ISA-H175GNI

I FM TUNER SECTION
Frequency range
Antenna Terminals

I AM TUNER SECTION
Frequency range

875010800 MHz (50 MHz steps)
75 Q unbalanced

522 - 1629 kHz (9 kHz steps)

520 - 1630 kHz (10 kHz steps)
(Except GN)

I GENERAL
Power supply

(For GC, GCS 8: GOP only) AC 110/127/220230/240 V, 50/60

Hz
AC 110V/220V, 50/60 Hz
AC 230-240V, 50 Hz

(For GD only)
(For GN only)
Power consumption

I SYSTEM
SC-HT75 (GC) Main unit: SA-HT75 (GC)
Speaker unit: SB-HT75 (P)
Subwooter: SB-W95 (P)
Main unit: SA-HT75 (GCS)
Speaker unit: SB-HT75 (P)
Subwooter: SB-W95 (P)
Main unit: SA-HT75 (GD)
Speaker unit: SB-HT75 (P)
Subwooter: SB-W95 (P)
Main unit: SA-HT75 (GCP)
Speaker unit: SB-HT75 (P)
Subwoofer: SB-W95 (P)

SC-HT75 (ace)

SC-HT75 (GD)

SC-HT75 (GCP)

SC-Hl75 (GN) Main unit: SA-HT75 (GN)
(:or 60, GCS 8t GCP only) 171 W Speaker unit: SB-HT75 (P)
( °' GD 8 G" 1' 168 w Subwoofer: se-w95 (P)
Power consumption in standby mode
F GC GCS & GCP onl ) 0 80 W "OMS:
( °' y 1.8pecitications are subject to change without notice. Weight and
(For GD 0"'Y) 070 W dimensions are approximate.
(For GN 00W) 030 W 2. Total harmonic distortion is measured by the digital spectrum
Dimensions (W x H x D) 430 x 114 x 368 mm analyzer.
Mass 8.4 kg

A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced protessional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

CONTENTS

Page
1 Before Use ------------------------------------------------------------------------------ 4
2 Before Repair and Adjustment ----------------------------------------------- 4

3 Protection Circuitry-
4 Accessories

4t

5 Operation Procedures
6 Handling Precaution for Traverse Deck (Optical Pickup) ------- 8
6.1. Grounding for electrostatic breakdown prevention ------------ 8
6.2. Handling Precautions for Traverse Unit (Optical Pickup)--8
7 Precautlon of Laser Dlode -9
8 Disassembly and Main Component Replacement Procedures
---------- 10
8.1. Checking for DVD B/E Module (1/2) and Power Switch
P.C.B.. ------------------------------------------------------------------------- 10
8.2. Checks for Panel P.C.B., DSP P.C.B ASP P.C.B., DVD

B/E Module (2) P.C.B. ------------------ 11
8.3. Checks for DVD Regulator P.C.B. ................................. 12
8.4. Checks for Input no.3. ......................................... 13
8.5. Check for Power P.C.B. ............................................... 13

8.6. Replacement of the Power to ------

8.7. Replacement of DVD Traverse Unit
8.8. Disassembly and assembly of the Disc Tray ------------------ 16
8.9. Disassembly and assembly of Mechanised Dirve part-"18
8.10. Disassembling the Middle Chassis -------------------------------- 24

Page
8.11. Terminal P.C.B. ----------------------------------------------------------- 25
8.12. Traverse Gear ------------------------------------------------------------- 25
8.13. Optical Pickup Unit ----------------------- 26

8.14. Disassembling the Spindle Motor Unit -- 26

9 Optical Pickup Self-Diagnosis and Replacement Procedure-~27

9.1. Self-diagnosis -------------------------------------------------------------- 27
9.2. Cautions to Be Used Before Replacing the Optical Pickup

Unit and Spindle Motor Assembly 28

1o Self-Diagnostic Function 29
10.1. Outline ---------------- 29
10.2. Self-Diagnostic Mode Settings and Display -------------------- 29
10.3. Additional Functions ----------------------------------------------------- 32

10.4. Pseudo ROM Correction
11 Adjustment Procedures

11.1. Service Tools and Equipmen

11.2. Important points in adjustment -------------------------------------- 37
11.3. Storing and Handling Test Discs ----------------------------------- 37
11.4. Optical Adjustment ------------------------------------------------------- 37
12 Electrlcal Adjustment ----------------------------------------- 40
12.1. Video Output (Brightness Signal) adjustment- 40
122. Video Output (Colour Signal) adjustment ----------------------- 4o
13 Illustratlon of lcs, Translstors and Dlodes -------------------------- 41
14 Terminal Function of ICs ----------------------------------------------------- 42