Sony HCD-GNZ77D, HCD-GNZ88D Service Manual

HCD-GNZ77D/GNZ88D

SERVICE MANUAL

Ver. 1.4 2009.10

• HCD-GNZ77D/GNZ88D are the
tuner, deck, DVD and amplifier
section in MHC-GNZ77D/GNZ88D.

(Photo: HCD-GNZ77D)

DVD
Section

Tape Deck
Section

Model Name Using Similar Mechanism HCD-GNZ7D/GNZ8D/GNZ9D
DVD Mechanism Type CDM74HF-DVBU101//C
Optical Pick-up Name KHM-310CAB/C2NP

Model Name Using Similar Machanism NEW

E Model

Amplifier section

HCD-GNZ88D

The following measured at AC 120, 127, 220, 240 V,
50/60 Hz
DIN power output (rated)

75 W + 75 W

(4 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
Front speaker: 100 W + 100 W

(4 ohms at 1 kHz, 10%

THD)
Center speaker: 40 W (8 ohms at 1 kHz,

10% THD)
Surround speaker: 40 W + 40 W

(8 ohms at 1 kHz, 10%

THD)

HCD-GNZ77D

The following measured at AC 120, 127, 220, 240 V,
50/60 Hz
DIN power output (rated)

75 W + 75 W

(4 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)

100 W + 100 W

(4 ohms at 1 kHz, 10%

THD)

Inputs
VIDEO INPUT (phono jacks):

VIDEO: 1 Vp-p, 75 ohms

AUDIO L/R: Voltage 250 mV,

impedance 47 kilohms
TV/SAT AUDIO IN L/R (phono jack):

Voltage 250 mV/450 mV,

impedance 47 kilohms

SPECIFICATIONS

Outputs
VIDEO OUT (phono jack):

max. output level
1 Vp-p, unbalanced, Sync
negative load impedance
75 ohms

COMPONENT VIDEO OUT:

Y: 1 Vp-p, 75 ohms
PB/CB: 0.7 Vp-p, 75 ohms
PR/CR: 0.7 Vp-p, 75 ohms

S-VIDEO OUT (4-pin/mini-DIN jack):

Y: 1 Vp-p, unbalanced,
Sync. negative
C: 0.286 Vp-p, load
impedance 75 ohms

PHONES (stereo mini jack):

Accepts headphones of

8 ohms or more
FRONT SPEAKER: Use only the supplied speakers
SURROUND SPEAKER (HCD-GNZ88D):

Use only the supplied speakers
CENTER SPEAKER (HCD-GNZ88D):

Use only the supplied speakers
SUB WOOFER OUT (phono jack):

Voltage 250 mV,

impedance 1 kilohm

– Continued on next page –

DVD DECK RECEIVER

9-887-258-05

2009J04-1
© 2009.10

Sony Corporation

Audio&Video Business Group
Published by Sony Techno Create Corporation

1

HCD-GNZ77D/GNZ88D

Disc player section

System Compact disc and digital

audio and video system

Laser Semiconductor laser

(DVD: λ=650 nm,
CD: λ=790 nm)
Emission duration:
continuous

Frequency response DVD (PCM 48 kHz):

2 Hz – 22 kHz (±1 dB)
CD: 2 Hz – 20 kHz (±0.5 dB)

Video color system format

Latin American model:
NTSC
Other models: NTSC, PAL

Tape deck section

Recording system 4-track 2-channel stereo
Frequency response 50 – 13,000 Hz (±3 dB),

using Sony TYPE I tape

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz

(50-kHz step)
Antenna FM lead antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz

AM tuner section

Tuning range
Saudi Arabian model: 531 – 1,602 kHz (with the

interval set at 9 kHz)
Other models: 531 – 1,602 kHz (with the

interval set at 9 kHz)

530 – 1,710 kHz (with the

interval set at 10 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz

General

Power requirements
Saudi Arabian model: 120 – 127 V, 120 – 220 V or

220 – 240 V AC,
50/60 Hz
Adjustable with voltage

selector
Thai model: 220 V AC, 50/60 Hz
Other models: 120 V or 220 – 240 V AC,

50/60 Hz

Adjustable with voltage

selector

Power consumption
MHC-GNZ88D 100 watts
MHC-GNZ77D 75 watts

Dimensions (w/h/d) (Approx.)

280 × 326 × 385.5 mm

Mass (Approx.)
HCD-GNZ88D 6.5 kg
HCD-GNZ77D 6.4 kg

Design and specifications are subject to change without
notice.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY P ARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

2

HCD-GNZ77D/GNZ88D

Ver. 1.1

Notes on Chip Component Replacement

•Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be
damaged by heat.

Flexible Circuit Board Repairing

•Keep the temperature of soldering iron around 270°C during
repairing.

• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering
or unsoldering.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to about
350 °C.
Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscou-s (sticky , less prone to flo w) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may also
be added to ordinary solder.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.

This appliance is
claassified as a CLASS 1
LASER product. This
label is located on the
rear exterior.

NOTE ON REPLACEMENT OF DMB15 BOARD

New part of EEPROM (IC103) on the DMB15 board cannot be
used. Therefore, if the mounted DMB15 board (A-1167-719-A, etc.)
is replaced, exchange new EEPR OM (IC103) with that used before
the replacement.

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

3

HCD-GNZ77D/GNZ88D

MODEL IDENTIFICATION

– BACK PANEL –

PARTS No.

MODEL PARTS No.

GNZ88D: E3, E15 2-663-830-0s
GNZ88D: EA 2-663-830-1s
GNZ88D: SP 2-663-830-2s
GNZ88D: E12, E13 2-663-830-3s
GNZ88D: PH 2-663-830-5s
GNZ88D: TH 2-663-830-6s
GNZ77D: E3, E15 2-663-831-0s
GNZ77D: E2 2-663-831-1s
GNZ77D: EA 2-663-831-2s
GNZ77D: MY, SP 2-663-831-3s
GNZ77D: E12, E13 2-663-831-4s
GNZ77D: PH 2-663-831-6s
GNZ77D: TH 2-663-831-7s

• Abbreviation
E2 : 120 V AC area in E model
E3 : 240 V AC area in E model
E12 : 220-240 V AC area in E model
E13 : 220-230 V AC area in E model
E15 : Iran model
EA : Saudi arabia model
PH : Philippine model
SP : Singapore model
MX : Mexican model
TH : Thai model
MY : Malaysia model

4

TABLE OF CONTENTS

HCD-GNZ77D/GNZ88D

1. GENERAL

Main Unit ................................................................................ 6

Remote Control ....................................................................... 8

2. DISASSEMBLY

2-1. Cabinet Steel Case............................................................. 10

2-2. Loading Panel.................................................................... 10

2-3. Front Panel Section ........................................................... 11

2-4. DVD Block Section........................................................... 11

2-5. Back Panel Section............................................................ 12

2-6. Main Board, ADC Board .................................................. 12

2-7. Speaker Board, S-Master Board........................................ 13

2-8. Power Board...................................................................... 13

2-9. Tape Mechanism Deck ...................................................... 14

2-10. Holder TC-R Assy, Holder TC-L Assy ............................. 14

2-11. Mic Board ......................................................................... 15

2-12. Karaoke Board, Video Board ............................................ 15

2-13. DMB15 Board ................................................................... 16

2-14. Sensor Board ..................................................................... 16

2-15. Motor (TB) Board ............................................................. 17

2-16. Motor (LD) Board ............................................................. 17

2-17. Pick-Up Unit ..................................................................... 18

2-18. SW Board, Driver Board................................................... 18

3. TEST MODE ..................................................................... 19

4. MECHANICAL ADJUSTMENTS............................... 23

5. ELECTRICAL ADJUSTMENTS................................. 24

6. DIAGRAMS

6-1. Block Diagram — RF/Servo Section — ........................... 27

6-2. Block Diagram — Video Section — ................................. 28

6-3. Block Diagram — Main Section —.................................. 29

6-4. Block Diagram — Audio Section — ................................ 30

6-5. Block Diagram — Function/Power Section —................. 31

6-6. Circuit Boards Location .................................................... 32

6-7. Printed Wiring Boards — Driver Section —..................... 34

6-8. Schematic Diagram — Driver Section —......................... 35

6-9. Printed Wiring Board — DMB15 Section — ................... 36

6-10. Schematic Diagram — DMB15 Section (1/5) — ............. 38

6-11. Schematic Diagram — DMB15 Section (2/5) — ............. 39

6-12. Schematic Diagram — DMB15 Section (3/5) — ............. 40

6-13. Schematic Diagram — DMB15 Section (4/5) — ............. 41

6-14. Schematic Diagram — DMB15 Section (5/5) — ............. 42

6-15. Printed Wiring Board — Main Section — ........................ 43

6-16. Schematic Diagram — Main Section (1/4) — .................. 44

6-17. Schematic Diagram — Main Section (2/4) — .................. 45

6-18. Schematic Diagram — Main Section (3/4) — .................. 46

6-19. Schematic Diagram — Main Section (4/4) — .................. 47

6-20. Printed Wiring Board — S-Master Section —.................. 48

6-21. Schematic Diagram — S-Master Section (1/4) —............ 50

6-22. Schematic Diagram — S-Master Section (2/4) —............ 51

6-23. Schematic Diagram — S-Master Section (3/4) —............ 52

6-24. Schematic Diagram — S-Master Section (4/4) —............ 53

6-25. Printed Wiring Board — ADC Section — ........................ 54

6-26. Schematic Diagram — ADC Section —........................... 55

6-27. Printed Wiring Boards — Panel Section — ...................... 56

6-28. Printed Wiring Board — Volume Section — .................... 57

6-29. Schematic Diagram — Panel Section — .......................... 58

6-30. Printed Wiring Board — Mic Section — .......................... 59

6-31. Schematic Diagram — Mic Section —............................. 60

6-32. Printed Wiring Board — Karaoke Section — ................... 61

6-33. Schematic Diagram — Karaoke Section —...................... 62

6-34. Printed Wiring Board — Video Section — ....................... 63

6-35. Schematic Diagram — Video Section —.......................... 64

6-36. Printed Wiring Board — Speaker Section — ...................65

6-37. Schematic Diagram — Speaker Section — ...................... 66

6-38. Printed Wiring Board — Power Section — ...................... 67

6-39. Schematic Diagram — Power Section — ......................... 68

7. EXPLODED VIEWS

7-1. Main Section ..................................................................... 79

7-2. Front Panel Section (1)...................................................... 80

7-3. Front Panel Section (2)...................................................... 81

7-4. Front Panel Section (3)...................................................... 82

7-5. Chassis Section (HCD-GNZ88D) ..................................... 83

7-6. Chassis Section (HCD-GNZ77D) ..................................... 84

7-7. DVD Block Section........................................................... 85

7-8. DVD Mechanism Deck Section (1) .................................. 86

7-9. DVD Mechanism Deck Section (2) .................................. 87

8. ELECTRICAL PARTS LIST ........................................ 88

5

HCD-GNZ77D/GNZ88D

Illustrati

List of button locations and reference pages

SECTION 1

GENERAL

This section is extracted
from instruction manual.

How to use page 104 to 106

Use this page to find the location of buttons and other
parts of the unit and remote that are mentioned in the
text.

Unit

ALPHABETICAL ORDER

A — D

CD SYNC 8 (61)
Deck A wk (60)
Deck B qj (60–62, 75)
DIRECTION ea (60–62, 73, 75)
DISC 1 ~ 3 q; (25, 28, 29)
DISC SKIP/EX-CHANGE qa

(18, 23, 25)

Disc tray 7 (18, 19, 23, 26–29,

33–36, 38, 69–71, 86, 87, 91)
DISPLAY r; (21, 76, 77)
Display 4 (77)
DVD eh (18, 19, 21, 24, 25, 61,

62, 67, 72, 76, 88)

E — O

ECHO LEVEL1) ws (67)
EQ BAND/MEMORY 3 (64)
GROOVE qk (63)
ILLUMINATION el (58, 77, 90)
IR Receptor 2 (17, 85)
MASTER VOLUME ql (24, 56,

74, 77, 85)
MIC2) (jack) wh (67, 72, 85, 94)

1)

(jack) wh (67, 72, 85, 94)

MIC 1

1)

MIC 2

(jack) wg (67, 72, 85, 94)
MIC LEVEL2) wf (67, 72, 85)
MIC 1 LEVEL
MIC 2 LEVEL

1)

wf (67, 72, 85)

1)

wd (67, 72, 85)

P — Z

PHONES (jack) w; (85, 94)
Power illuminator wj (77)
PRESET EQ wl (63, 64)
REC PAUSE/START 6 (61, 62,

72)
SOUND FIELD 5 (65, 83)
SUB WOOFER ON/OFF

(67)
TAPE A/B ef
Tape lid qj wk (60)
TUNER/BAND eg (57–59, 76)
TUNING +/– qh (57–59)
TV/SAT1) ed (62, 76, 84, 86)
VIDEO
VIDEO INPUT

94)

(60–62, 72, 75, 76)

1)

es (62, 76, 84)

1)

TAPE A/B ef (60–62, 72, 75, 76)

Name of button/part Reference page

3)

ej

(jacks) wa (83,

on number

r

RR

SYMBOLS

?/1 (on/standby) ek (16, 18, 58,

84, 90)

Z OPEN/CLOSE 9 (18, 19, 23,

25, 86)

nN (play) qs (24–27, 31, 33,

35, 36, 38, 48, 51, 60–62, 73,
75, 85, 87)

. OPERATION DIAL >

(go backward/forward) 1
(24, 32, 34, 39, 59, 62, 64, 65)

mM (rewind/fast forward)

qh (24, 60, 88)

qh (25)

X (pause) qd (16)
x (stop) qf (61–62, 73, 86, 87,

90)

Z PUSH (Eject A) e; (60)
Z PUSH (Eject B) qg (60)

1)

Except for MHC-GNZ55D.

2)

MHC-GNZ55D only.

3)

MHC-GN999D/
MHC-GN999DS only.

6

104

GB

Top view

Front view

34 5 6

2

HCD-GNZ77D/GNZ88D

1

r;
el
ek

ej
eh
eg

ef
ed
es

ea
e;

wl
wk

wj

wh

wg

wf

wd

ws

wa

7
8
9

q;
qa
qs

qd
qf

qg
qh

qj
qk

ql
w;

Additional Information

continued

105

GB

7

HCD-GNZ77D/GNZ88D

Remote control

ALPHABETICAL ORDER

A — L

ADVANCE wf (25)
ALBUM +/– qa (20, 24)
ANGLE q; (44)
AUDIO 8 (34, 43, 67, 70, 83)
CLEAR wk (20, 27–30, 35, 41, 53)
DISC SKIP 3 (25, 28, 29)
DISPLAY ed (21, 76, 77)
ENTER wh(18–20, 27–31, 34, 36–39, 40, 42, 45–50,

53, 56–59, 68–71, 74–76, 90)
FM MODE 7 (59, 89)
FUNCTION +/– 4 (19, 24, 57–60, 67, 75, 84, 88)
KARAOKE MODE ea (68, 88)
KARAOKE PON e; (68)
KEY CONTROL #/2 es (69)

M — S

MENU qs (30, 32, 34–36, 39, 57, 58)
Numeric Buttons

1)2)

wl (17, 20, 21, 24, 30, 31, 41,

46–50, 59)
PICTURE NAVI 6 (35, 36, 41)
PRESET + qh (57–59)
PRESET – wd (57–59)
REPEAT 7 (30)
REPLAY wf (25)

3)

SCORE

5 (72)
SLEEP eg (20, 74)
SLOW qj (25)
SLOW ws (25)
SOUND FIELD 5

4)

qd3) (65, 83)
STEP C wf (25)
SUBTITLE 9 (44)

T — Z

THEATRE SYNC 1 (21)
TIMER MENU eh (18, 74–76)
TIME/TEXT ef (77–79)
TOP MENU wj (30)
TUNING + qj (57–59)
TUNING – ws (57–59)

2)

TV

w; (17)

2)

TV CH +
TV CH –
TV/VIDEO
TV VOL +/–
TV &/1
VOLUME +/–

qh (17)

2)

wd (17)

2)

eg (17)

1)2)

qf (17)

(on/standby)2) 2 (17)

1)

qf (24, 56, 74, 77, 85)

NUMBERS AND SYMBOLS

?/1 (on/standby) 2 (16, 18, 74, 75, 85)
x (stop) qk (24, 26, 32, 34–36, 39, 45, 58, 60, 75, 86,

87)

X (pause) ql (24, 60)

1)

(play) wa(24–27, 31, 33, 35, 36, 38, 48, 51,

H

60, 75, 85, 87)

> (go forward) qh(21, 24, 32, 34, 39)
. (go backward) wd(24, 32, 34, 39)
M (fast forward) qj (24, 60, 88)
m (rewind) ws (24, 60, 88)

V/v/B/b

10/0

-/--

wh (18, 19, 27–31, 33–42, 45–50, 56, 65,

68–72, 74–76, 90)

2)

wl

2)

wk (17)

O RETURN wg (31, 34, 39, 42)

DISPLAY qg (9, 20, 26–31, 36, 37, 40–42, 45, 47,

49, 56, 68–72, 80, 90)

c STEP wf (25)

1)

The numeric button 5, TV VOL +, VOLUME + and
H buttons have a tactile do t. Use th e tac tile dot as
a reference when operating the system.

2)

This button is used to operate a Sony TV. For
details, see “Operating a Sony TV with the remote”
on page 17.

3)

MHC-GN999D/MHC-GN999DS/
MHC-GNZ88D/MHC-GNZ77D only.

4)

MHC-GNZ55D only.

eh

eg

ef

ed

es

ea

e;

wl

wk

wj

wh

wg

wf

wd

ws

wa

w;

1

2

3

4

5

6

7

8

9

q;

qa

qs

qd

qf

qg

qh

qj

qk

ql

GB

106

8

Note : Disassemble the unit in the order as shown below.

SET

2-1. CABINET STEEL CASE

(Page 10)

HCD-GNZ77D/GNZ88D

SECTION 2

DISASSEMBLY

2-2. LOADING PANEL

(Page 10)

2-3. FRONT PANEL SECTION

(Page 11)

2-4. DVD BLOCK SECTION

(Page 11)

2-5. BACK PANEL SECTION

(Page 12)

2-6. MAIN BOARD, ADC BOARD

(Page 12)

2-9. TAPE MECHANISM DECK

(Page 14)

2-10. HOLDER TC-R ASSY ,

HOLDER TC-L ASSY
(Page 14)

2-11. MIC BOARD

(Page 15)

2-12. KARAOKE BOARD,

VIDEO BOARD
(Page 15)

2-13. DMB15 BOARD

(Page 16)

2-7. SPEAKER BOARD,

S-MASTER BOARD
(Page 13)

2-8. POWER BOARD

(Page 13)

2-17. PICK-UP UNIT

(Page 18)

2-14. SENSOR BOARD

(Page 16)

2-15. MOTOR (TB) BOARD

(Page 17)

2-16. MOTOR (LD) BOARD

(Page 17)

2-18. SW BOARD,

DRIVER BOARD
(Page 18)

9

HCD-GNZ77D/GNZ88D

Note : Follow the disassembly procedure in the numerical order given.

2-1. CABINET STEEL CASE

4

screw

(case 3 TP2)

3

screw

(case 3 TP2)

0

cabinet steel case

8

9

8

1

screw

(case 3 TP2)

6

two screws (+BVTP 3

5

three screws

(+BVTP 3

7

two screws

(+BVTP 3

2

screw

(case 3 TP2)

×

×

×

8)

8)

8)

2-2. LOADING PANEL

CD mechanism deck (CDM74)

1

Turn the pulley to the direction of the arrow.

pulley

Front panel side

2

Pull-out the disc tray.

3

loading panel

10

2-3. FRONT PANEL SECTION

7

screw

(tapping screw)

qa

CN503 (3P)

0

CN1967 (2P)

9

5

CN205 (11P)

HCD-GNZ77D/GNZ88D

qs

front panel section

four screws (+BVTP 3

6

2-4. DVD BLOCK SECTION

0

DVD block section

4

CN121 (3P)

8

3

CN131 (8P)

1

wire (flat type) (11 core)

(CN101)

2

×

8)

6

wire (flat type) (25 core)

(CN201)

7

wire (flat type) (13 core)

(CN301)

5

(+BVTP 3

screw

(tapping screw)

three

screws

×

8)

4

three

three

screws

screws

(+BVTP 3

3

(+BVTP 3

×

8)

×

8)

1

CN2000 (6P)

2

CN1880 (8P)

9

wire (flat type) (13 core)

(CN405)

8

wire (flat type) (19 core)

(CN521)

11

HCD-GNZ77D/GNZ88D

)

d

2-5. BACK PANEL SECTION

0

back panel section

3

two

screws
(+BVTP 3
(HCD-GNZ88D only)

×

8)

2

two

screws

(+BVTP 3

4

(+BVTP 3

×

screw

8)

×

8)

wire (flat type)

1

2-6. MAIN BOARD, ADC BOARD

4

two

screws

(+BVTT 3

(9 core)

×

6 (sumitite))

8

9

ADC board

9

CN580 (3P)

5

two

screws

(+BVTP 3

6

three

(+BVTP 3

7

three

8

MAIN boar

screws

(+BVTP 3

×

8)

screws

×

×

8)

8

12

1

CN501 (12P)

2

wire (flat type) (19 core)

3

CN812 (3P)

6

7

CN590 (7P)

5

two

screws

(+BVTP 3

×

8)

2-7. SPEAKER BOARD, S-MASTER BOARD

d

)

7

two

screws

6

CN502 (6P)

0

two

screws

(+BVTT 3

qa

S-MASTER board

×

6 (sumitite))

(+BVTT 3

×

6 (sumitite))

8

heat sink assy

9

two

screws

(+BVTT 3

2

3

CN1700 (2P)

×

6 (sumitite))

CN1601 (4P)

HCD-GNZ77D/GNZ88D

1

CN1500 (4P)

4

two

screws

(+BVTP 3

5

×

8)

SPEAKER boar

2-8. POWER BOARD (HCD-GNZ88D only)

2

two

screws

5

two

(tapping)

9

bracket assy

3

(+BVTT 3

screws

screw

(+BVTT 3

×

6 (sumitite))

×

6 (sumitite))

qa

bracket (SMPS-B5)

8

four

screws

(+BVTP 3

×

qs

8)

POWER board

0

(+BVTP 3

7

(tapping)

6

bracket assy

4

screw

(+BVTT 3

three

screws

screw

1

CN1100 (2P)

×

×

8)

6 (sumitite)

13

HCD-GNZ77D/GNZ88D

k

r

2-9. TAPE MECHANISM DECK

1

wire (flat type)

(11 core)

2

two

screws

(+BVTP 2.6 (3CR))

3

two

screws

(+BVTP 2.6 (3CR))

4

two

screws

(+BVTP 2.6 (3CR))

5

tape mechanism dec

2-10. HOLDER TC-R ASSY, HOLDER TC-L ASSY

6

spring (L)

5

holder TC-L assy

2

damper

1

dampe

14

3

holder TC-R assy

4

spring (R)

2-11. MIC BOARD

)

4

bracket (TC)

HCD-GNZ77D/GNZ88D

1

four

screws

(+BVTP 2.6 (3CR))

2

bracket (pivot)

5

MIC board

2-12. KARAOKE BOARD, VIDEO BOARD

7

CN401 (5P)

3

three

(+BVTP 3

screws

6

(CN1966)

×

8)

wire (flat type) (13 core)

9

VIDEO board

2

KARAOKE board

1

two

screws

(+BVTP 3

×

3

screw

(+BVTP 3

8)

8

two

screws

(+BVTP 3

×

8)

5

(HCD-GNZ88D only

×

8)

4

screw

(+BVTP 3

shield plate (video)

×

8)

15

HCD-GNZ77D/GNZ88D

)

2-13. DMB15 BOARD

9

screw

(+BVTP 3

×

0

cover (CDM)

8

two

8)

screws

(+BVTP 3

×

8)

7

bracket mediatek

6

(+BVTP 3

2-14. SENSOR BOARD

2

tray

screw

×

4

two

screws

(+BVTP 3

1

(+PTPWH M2.6)

6

(+PTPWH M2.6)

8)

×

8)

floating

floating

screw

8

screw

(+BTTP (M2.6))

screw

9

SENSOR board

0

CN731
(3P)

2

wire (flat type) (24 core

(CN101)

1

CN201 (6P)

5

DMB15 board

3

two

screws

(+BVTP 3

3

belt (table)

4

(+PTPWH M2.6)

×

8)

floating

5

pulley (table)

screw

16

7

gear (geneva)

2-15. MOTOR (TB) BOARD

table assy

2

stopper

1

2

stopper

6

table motor assy (M741)

HCD-GNZ77D/GNZ88D

2-16. MOTOR (LD) BOARD

4

Remove the two solders of motor.

5

loading motor assy (M751)

4

MOTOR (TB) board

5

Remove the two solders of motor.

3

two

screws

(+BTTP (M2.6))

2

two

screws

(+BTTP (M2.6))

3

MOTOR (LD) board

1

belt (loading)

17

HCD-GNZ77D/GNZ88D

)

d

2-17. PICK-UP UNIT

3

two insulator screws

6

pick-up unit

5

two insulators

2

two insulator screws

4

two insulators

2-18. SW BOARD, DRIVER BOARD

2

SW board

7

holder (310)

7

CN702 (5 core)

4

CN703 (4P)

6

DRIVER boar

1

floating

(+PTPWH M2.6

screw

18

3

1

screw

(+BTTP (M2.6))

CN704 (2P)

5

two

screws

(+BTTP (M2.6))

SECTION 3

TEST MODE

HCD-GNZ77D/GNZ88D

[PANEL TEST MODE]

•This mode is used to check the fluorescent indicator tube, LEDs,
keys, VOLUME jog, model, destination, software version and
VACS level.

Procedure:

1. Press x button, [ILLUMINATION] button and [DISC 2] button

simultaneously.

2. All LEDs and segments in fluorescent indicator tube are lighted

up. All LEDs are lighted up in red color where the SUB
WOOFER ON/OFF LED is lighted up in green color.

3. When you want to enter to the software version dispaly mode,

press [DISC 1] button. The model information appears on the
fluorescent indicator tube. Press [DISC 1] button again to view
the destination information.

4. Each time [DISC 1] button is pressed, the display changes from

MC version, SYS version, UI version, DVD version, CDMA
version, CDMB version, ST version, TA version, TM version,
TC version in this order, and returns to the model ver sion display .

5. When [DISC 3] button is pressed while the version numbers are

being displayed except model and destination, the date of the
software creation appears. When [DISC 3] button is pressed
again, the display returns to the software version display . When
[DISC 1] button is pressed while the date of the software creation
is being displayed, the date of the software creation is displayed
in the same order of software version display.

6. Press [DISC 2] button, the key check mode is activated.

7. In the key check mode, the fluorescent indicator tube displays

“K 0 V0”.
Turn the [OPERATIONAL DIAL] clockwise; “K” value increases
by one. Turn the [OPERATIONAL DIAL] counterclockwise; “K”
value increases by one. Each time a button is pressed, “K” v alue
increases. Press other keys on main unit to check whether the
key is detected. However, once a button has been pressed, it is
no longer taken into account.
“V” value increases in the manner of 0, 1, 2, 3 ... if [VOLUME]
knob is turned clockwise, or it decreases in the manner of 0, 9,
8, 7 ... if [VOLUME] knob is turned counterclockwise.

8. When [DISC 3] button is pressed after all LEDs and segments in

fluorescent indicator tube light up, the fluorescent indicator tube
displays “V A CS A”. A is VACS lev el which is triggered by signal
level.

9. When [DISC SKIP/EX-CHANGE] button is pressed after all LEDs

and segments in fluorescent indicator tube light up, alternate
segments in fluorescent indicator tube would light up. If you
press [DISC SKIP/EX-CHANGE] button again, another half of
alternate segments in fluorescent indicator tube would light up.
When [DISC SKIP/EX-CHANGE] button is pressed again, all
segments lights off. Press [DISC SKIP/EX-CHANGE] button again
would cause all segments lights up.

10. To release from this mode, press three buttons in the same

manner as step 1, or disconnect the power cord.

[COMMON TEST MODE]

•This mode is used to check operations of the respective sections
of Amplifier and Tape.

Procedure:

•To enter Common Test Mode

1. Press x button, [ILLUMINATION] button and [DISC 3] button

simultaneously.

2. The D VD ring indicators and the line below D VD ring indicator

flash synchronously on the fluorescent indicator tube. The
function is changed to TV where the function is changed to
DVD.

• Check of Amplifier

1. Press [EQ BAND/MEMORY] button repeatedly until a message
“GEQ MAX” appears on the fluorescent indicator tube. GEQ
increases to its maximum.

2. Press [EQ BAND/MEMORY] button repeatedly until a message
“GEQ MIN” appears on the fluorescent indicator tube. GEQ
decreases to its minimum.

3. Press [EQ BAND/MEMORY] button repeatedly until a message
“GEQ FLAT” appears on the fluorescent indicator tube. GEQ
is set to flat.

4. When the [VOLUME] knob is turned clockwise even slightly,
the sound volume increases to its maximum and a message
“VOLUME MAX” appears on the fluorescent indicator tube.

5. When the [VOLUME] knob is turned counterclockwise even
slightly, the sound volume decreases to its minimum and a
message “VOLUME MIN” appears on the fluorescent indicator
tube.

•Tape function

1. When a tape is inserted in Deck B and recording is started, the
function is changed to TV automatically . The function is change
to DVD automatically when a tape is inserted in Deck B and
recording is started. When [CD SYNC] button is pressed during
recording in function, ALC (Automatic Logic Control) is turned
on.

2. During recording, press m button will stop the recording and
the function is changed to TAPE B and rewind the tape in Deck
B until the recording start position and playback of the tape in
Deck B is started. If the [REC PAUSE/START] button is pressed
for a pause and pressed again to resume recording during
recording time, when the tape is rewind, the tape will be rewind
until the position where the pause is applied.

•To release from Common Test mode

1. To release from this mode, press

2. The cold reset is enforced at the same time.

[COLD RESET]

• The cold reset clears all data including preset data stored in the

RAM to initial conditions. Execute this mode when returning
the set to the customer.

Procedure:

1. Press ?/1 button to turn on the system.

2. Press x button, [ILLUMINATION] button, and ?/1 button
simultaneously.

3. The message “COLD RESET” appears on the fluorescent
indicator tube. Then, the fluorescent indicator tube becomes
blank for a while, and the system is reset.

[VACS ON/OFF]

•This mode is used to switch on and off the VACS (Variable

Attenuation Control System).

Procedure:

1. Press ?/1 button to turn on the system.

2. Press x button, [DIRECTION] button and [DISC 1]
simultaneously. The message “VACS OFF” or “VACS ON”
appears on the fluorescent indicator tube.

[TUNER STEP CHANGE]

•The step interval of AM c hannels can be toggled between 9 kHz

and 10 kHz. This mode is not available for Saudi Arabia and
Russia models.

?/1 button.

19

HCD-GNZ77D/GNZ88D

Procedure:

1. Press ?/1 button to turn on the system.

2. Press [TUNER/BAND] button repeatedly to select the “AM”.

3. Press

4. Press [ILLUMINATION] button and

[DVD SHIP MODE (WITH MEMORY CLEAR)]

•This mode moves the optical pick-up to the position durable to

Procedure:

1. Press ?/1 button to turn on the system.

2. Select DVD function.

3. Press x button, [DIRECTION] button and ?/1 button

4. After the “STANDBY” blinking display finishes, a message

[DVD SHIP MODE (WITHOUT MEMORY CLEAR)]

•This mode moves the optical pick-up to the position durable to

Procedure:

1. Press ?/1 button to turn on the system.

2. Select DVD function.

3. Press [DVD] button and

4. After the “STANDBY” blinking display finishes, a message

[DVD TRAY LOCK MODE]

•This mode let you lock the disc tray. When this mode is

Procedure:

1. Press ?/1 button to turn on the system.

2. Select DVD function.

3. Press x button and [OPEN/CLOSE] button simultaneously and

[TCM OFFLINE MODE]

•This mode prevents the system from turning off automatically

Procedure:

1. When the system is turned off, press [EQ BAND/MEMORY]

2. The message “TCM OFFLINE” will appears on the fluorescent

•To release from TCM Offline Mode

?/1 button to turn off the system.

?/1 button simultaneously.

The system will turn on automatically. The message “AM 9K
STEP” or “AM 10K STEP” appears on the fluorescent indicator
tube and thus the channel step is changed.

vibration and clears all data including preset data stored in the
RAM to initial conditions. Use this mode when returning the
set to the customer after repair.

simultaneously during “DVD NO DISC” condition. The system
will turn off automatically.

“MECHA LOCK” appears on the fluorescent indicator tube and
the DVD ship mode is set.

vibration. Use this mode when returning the set to the customer
after repair.

?/1 button simultaneously during “DVD

NO DISC” condition. The system will turn off automatically.

“MECHA LOCK” appears on the fluorescent indicator tube and
the DVD ship mode is set.

activated, the disc tray will not open when [OPEN/CLOSE]
button or [DISC SKIP/EX-CHANGE] button is pressed. The
message “LOCKED” will appears on the fluorescent indicator
tube.

hold down until “LOCKED” or “UNLOCKED” appears on the
fluorescent indicator tube (around 5 seconds).

when TCM is not connected. Therefore, measurements can be
done even when TCM is not connected during production.

button, [TAPE A/B] button and ?/1 button simultaneously. The
system will turn on automatically.

indicator tube.

To release from this mode, perform “COLD RESET” or turn off
the power supply.

[TV/SAT SWITCHING]

•This mode let you switch from TV to SAT and vice-versa.

Procedure:

1. Press

2. Select TV function.

3. Press [TV/SAT] button and ?/1 button simultaneously. The

[DVD COLOR SYSTEM]

• This mode let you change the color system of the video output

Procedure:

1. Press ?/1 button to turn on the system.

2. Select DVD function.

3. Press ?/1 button again to turn off the system.

4. Press X button and ?/1 button simultaneously. The system

[REMOTE DISABLE MODE]

• This mode let you disable the remote commander reception.

Procedure:

1. Press

2. Press x button, [DIRECTION] button and [DISC 3] button

[PROGRESSIVE]

• This mode let you change the format of the video output from

Procedure:

1. Press ?/1 button to turn on the system.

2. Press [DVD] button and [DISPLAY] button simultaneously. “P

[MTK FIRMWARE DISPLAY]

•This mode is used to display the MTK firmware version.

Procedure:

1. Press ?/1 button to turn on the system.

2. Press [DVD] button to switch to DVD function.

3. Press ?/1 button again to turn off the system.

4. Press x button and ?/1 button. The system turns on

5. The version of MTK firmware appears on the TV screen.

[DVD SERVICE MODE]

•This mode let you make diagnosis and adjustment easily by

?/1 button to turn on the system.

function will change to SAT. Press the same buttons again to
change from SAT to TV.

from P AL to NTSC or vice-versa. This mode is not av ailable for
Latin American and Russian models.

will turn on automatically.
The message “COLOR PAL” or “COLOR NTSC” appears on
the fluorescent indicator tube.

When this mode is activated, the system will not response if the
button on the remote commander is pressed. The message “RM
DISABLE” appears on the fluorescent indicator tube.
This mode is essential for conducting test and repairing when
no interruption from the other remote commander is expected.
This mode is cancelled automatically when the system is turned
off.

?/1 button to turn on the system.

simultaneously until “SIRCS ON” or “SIRCS OFF” appears on
the fluorescent indicator tube.

the COMPONENT OUT jacks among PROGRESSIVE AUTO,
PROGRESSIVE VIDEO and INTERLACE.

AUTO” or “P VIDEO” or “INTERLACE” appears on the
fluorescent indicator tube.

automatically.

using the remote commander and the TV. The instructions,
diagnostic results, etc. are given on the on-screen display.

20

HCD-GNZ77D/GNZ88D

Ver. 1.3

• TEST DISC LIST

Be sure to use the DVD disc that matches the signal standards of
your region.

• CD
YEDS-18 (Part No.: 3-702-101-01)
PATD-012 (Part No.: 4-225-203-01)

• DVD SL (Single Layer)

NTSC : HLX-503 (Part No.: J-6090-069-A)

HLX-504 (Part No.: J-6090-088-A)

PAL:HLX-506 (Part No.: J-6090-077-A)

• DVD DL (Dual Layer)

NTSC : HLX-501 (Part No.: J-6090-071-A)

HLX-505 (Part No.: J-6090-089-A)

PAL:HLX-507 (Part No.: J-6090-078-A)

• Procedure to enter to DVD Service Mode:

1. Press ?/1 button to turn on the system.

2. Select DVD function.

3. Press x button and [OPEN/CLOSE] button simultaneously and

then turn the [VOLUME] knob clockwise.

4. The message “SERVICE IN” appears on the fluorescent

indicator tube and the Top Menu of Remocon Diagnosis Menu
appears on the on-screen display on the TV. The model name
and revision number is displayed at the bottom of the on-screen
display.

Remocon Diagnosis Menu

0. External Chip Check

1. Servo Parameter Check

2. Drive Manual Operation

3. Emergency History

4. Version Information

Model Name : GML6DS_ME
IF-con : V
Syscon : Ver.

er. 01.00 (0000)

0.302

5. To execute each function, press its number by using numeric

button on the remote commander.

6. To release from this mode, press ?/1 button to turn off the

system.

• Execute IOP Measurement

In order to execute IOP measurement, the following standard
procedures must be followed.

1. From the Top Menu of Remocon Diagnosis Menu, select “2.

Drive Manual Operation” by pressing the [2] button on the
remote commander. The following screen appears on the on­screen display.

Drive Manual Operation

1. Servo Control

2. Track/Layer Jump

3. Manual Adjustment

4. Mecha test Mode

5. MIRR time Adjust

0. Return to Top Menu

Manual Adjust

1. Track Balance Adjust:

2. Track Gain Adjust:

3. Focus Balance Adjust:

4. Focus Gain Adjust:

5. Eg Boost Adjust:

6. Iop:

7. TRV. Level:

8. S curve(FE) Level:

9. RFL(PI) Level:

0. MIRR Time:

O o Change Value
RETURN Return to previous menu

3. Select “6. Iop:” by pressing [6] button on the remote commander .

4. Wait until a hexadecimal number appears in the on-screen
display as below:

Manual Adjust

1. Track Balance Adjust:

2. Track Gain Adjust:

3. Focus Balance Adjust:

4. Focus Gain Adjust:

5. Eg Boost Adjust:

6. Iop. ED:

7. TRV. Level:

8. S curve(FE) Level:

9. RFL(PI) Level:

0. MIRR Time:

O o Change Value
RETURN Return to previous menu

5. Con vert data from hexadecimal to decimal by using con version
table.

6. Please find the label on the rear of the BU (Base Unit).
The default IOP value is written in the label.

7. Subtract between these two values.

8. If the remainder is smaller than 93 (decimal), then it is OK.
However if the v alue is higher than 93, then the BU is defectiv e
and need to be change.

9. Press [RETURN] button on the remote commander to return to
previous menu.

10. Press [0] button on the remote commander to return to the Top
Menu of Remocon Diagnosis Menu.

11. Press ?/1 button to turn off the system.

• Check Emergency History

To check the emergency history, please follow the following
procedure.

1. From the Top Menu of Remocon Diagnosis Menu, select “3.
Emergency History” by pressing the [3] button on the remote
commander. The following screen appears on the on-screen
display.

2. Select “3. Manual Adjustment” by pressing the [3] button on
the remote commander. The following screen appears on the
on-screen display.

21

HCD-GNZ77D/GNZ88D

Ver. 1.3

Emg.History Check

Laser Hours CD 999h 59min

1. 01 05 04 04
00 00 00 00 00 00 23 45

2. 02 02 01 01 00 A9 4B 00
00 00 00 00 00 00 23 45

Next Next Page Prev Prev Page

O Return to Top Menu

DVD 999h 59min

00 92 46 00

2. You can check the total time when the laser is turned on during
playback of DVD and CD from the above menu. The maximum
time, which can be displayed are 999h 59min.

3. You can check the error code of latest 10 emergency history
from the above menu. To view the previous or next page of
emergency history, press . or > on the remote
commander. The error code consists of

• Error Code

Example of Error code

1. 01 05 04 04 00 92 46 00
00 00 00 00 00 00 23 45

The meaning of error code is as below:

01: Communication error (No reply from syscon)
02: Syscon hung up
03: Power OFF request when syscon hung up
19: Thermal shutdown
24: MoveSledHome error
25: Mechanical move error (5 Changer)
26: Mechanical move stack error
30: DC motor adjustment error
31: DPD offset adjustment error
32: TE balance adjustment error
33: TE sensor adjustment error
34: TE loop gain adjustment error
35: FE loop gain adjustment error
36: Bad jitter after adjustment
40: Focus NG
42: Focus layer jump NG
52: Open kick spindle error
51: Spindle stop error
60: Focus on error
61: Seek fail error
62: Read Q data/ID error
70: Lead in data read fail
71: TOC read time out (CD)
80: Can’t buffering
81: Unknown media type

•Time of error code

This is the laser time when an error occurred.

Example of Error code

1. 01 05 04 04 00 92 46 00
00 00 00 00 00 00 23 45

To clear the Laser Hour

Press [DISPLAY] button and then press [CLEAR] button. The data
for both CD and DVD data are reset.

Emg.History Check

Laser Hours CD 0h 0min

1. 01 05 04 04
00 00 00 00 00 00 23 45

2. 02 02 01 01 00 A9 4B 00
00 00 00 00 00 00 23 45

Next Next Page Prev Prev Page

O Return to Top Menu

DVD 0h 0min

00 92 46 00

To clear the Emergency History

Press [TOP MENU] button and then press [CLEAR] button. The error
code for all emergency history would be reset.

Emg.History Check

Laser Hours CD 999h 59min

1. 00 00 00 00
00 00 00 00 00 00 00 00

2. 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00

Next Next Page Prev Prev Page

O Return to Top Menu

DVD 999h 59min

00 00 00 00

To clear the Initialize Setup Data

Press [MENU] button and then press [CLEAR] button on the remote
commander.

Emg.History Check

Laser Hours CD 999h 59min

Initialize setup data...

DVD 999h 59min

• Parameter of error code

This is the detail of error code.

Example of Error code

1. 01 05 04 04 00 92 46 00
00 00 00 00 00 00 23 45

22

Next Next Page Prev Prev Page

O Return to Top Menu

HCD-GNZ77D/GNZ88D

SECTION 4

Ver. 1.3

MECHANICAL ADJUSTMENTS

To return to the Top Menu of Remocon Diagnosis Menu

Press [0] button on the remote commander.

• Check Version Information

To check the version information, please follow the following
procedure.

1. From the Top Menu of Remocon Diagnosis Menu, select “4.
Version Information” by pressing the [4] button on the remote
commander. The following screen appears on the on-screen
display.

Version information

Firm (Main) : Ver. xxxxx
Firm (Sub) : xxxxx
RISC : xxxxx
8032 : xxxxx
Audio DSP : xxxxx
Servo DSP : xxxxx

O Return to Top Menu

To return to the Top Menu of Remocon Diagnosis Menu, press
[0] on the remote commander.

Precaution

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.

Torque Measurement

Mode

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

Torque meter

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

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)

23

HCD-GNZ77D/GNZ88D

)

Ver. 1.3

SECTION 5

ELECTRICAL ADJUSTMENTS

DVD SECTION

When the optical pick-up assy is replaced, perform the “Execute
IOP Measurement”.

Execute IOP Measurement (See page 21)

[TEST DISC LIST]

Be sure to use the DVD disc that matches the signal standards of
your region.

• CD
YEDS-18 (Part No.: 3-702-101-01)
PATD-012 (Part No.: 4-225-203-01)

• DVD SL (Single Layer)

NTSC : HLX-503 (Part No.: J-6090-069-A)

HLX-504 (Part No.: J-6090-088-A)

PAL : HLX-506 (Part No.: J-6090-077-A)

• DVD DL (Dual Layer)

NTSC : HLX-501 (Part No.: J-6090-071-A)

HLX-505 (Part No.: J-6090-089-A)

PAL : HLX-507 (Part No.: J-6090-078-A)

[RFMON Level Check]

Connection:

oscilloscope

DMB15 board

CN105 pin 6 (RFMON)

CN105 pin

3

(GND)

Procedure:

1. Connect an oscilloscope to CN105 pin 6 (RFMON) and
CN105 pin 3 (GND) on the DMB15 board.

2. Turn the power on.

3. Set the test disc (refer to the TEST DISC LIST) on the tray
and press H button to playback.

4. Confirm that oscilloscope waveform is clear and check
RFMON signal level is correct or not.

Note: A clear RFMON signal waveform means that the shape “◊” can be

clearly distinguished at the center of the waveform.

+
–

Checking Location: DMB15 board (Side A)

IC101

(SIDE A)

IC104

IC102

IC201

16

CN105

CN105 pin 3 (GND

DMB15 BOARD

CN106

CN105 pin 6 (RFMON)

VIDEO SECTION

Video Level Check (VIDEO BOARD)

Purpose

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

oscilloscope

75

Ω

set

J1902
VIDEO OUTPUT

RFMON signal waveform

VOLT/DIV: 200 mV

TIME/DIV: 500 ns

level: 0.58 ± 1.23 Vp-p (DVD)

0.57 ± 1.1 Vp-p (CD)

Procedure:

1. Connect oscilloscope to VIDEO output.

2. Load a DVD reference disc playback.

3. Check the video signal level is 1.00±0.07Vp-p.

1.00 ± 0.07 Vp-p

(WHITE 100%)

24

HCD-GNZ77D/GNZ88D

r

e

DECK SECTION

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 giv en 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 R­CH.

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

•Test Tape

Tape Signal Used for

P-4-A063 6.3 kHz, –10 dB Azimuth Adjustment

Record/Playback Head Azimuth Adjustment

DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback

3. Mode: Playback

test tape
P-4-A063
(6.3 kHz, –10 dB)

L-CH

MAIN
board
IC101

R-CH

waveform of oscilloscope

in phase 45°90°135°180

pin 28

pin 36

L
R

pin 37

good

oscilloscop

V

wrong

H

°

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

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

test tape
P-4-A063
(6.3 kHz, –10 dB)

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

set

MAIN board
IC101
Pin 36 (GND)

level mete

+

–

2. T urn the adjustment screw and chec k 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.

output
level

within
1dB

L-CH
peak

R-CH
peak

within
1dB

screw
position

L-CH
peak

screw
position

R-CH
peak

forward

forward

25

HCD-GNZ77D/GNZ88D

MEMO

26

SECTION 6
DIAGRAMS

6-1. BLOCK DIAGRAM — RF/SERVO SECTION —

HCD-GNZ77D/GNZ88D

DETECTOR

OPTICAL PICK-UP

BLOCK

LASER
DIODE

(FOR CD)

LASER
DIODE

(FOR DVD)

2AXIS

DEVICE

FOCUS/

TRACKING

COIL

MM

SLED

MM

SPINDLE

RF

LIMIT

CD LD

PD

DVD LD

VR650

VR780

MSW

FCS+
FCS–

TRK+
TRK–

SL–
SL+

SP+
SP–

A
B
C
D

F

E

CBA

D

AUTOMATIC POWER
CONTROL (FOR CD)

Q102 (1/2)

AUTOMATIC POWER

CONTROL (FOR DVD)

Q102 (2/2)

VOLUME CONTROL

Q101, Q103

L

DVDRFIP

6

2

DVDA

3

DVDB

4

DVDC

5

DVDD

19

TPI

18

TNI

A

8

NA

B

9

NB

C

10

MC

D

11

MD

176

LI M SW

23

LD01

20

MD12
MD11

21

LD02

22

MSW

50

42
41

36 48
37 1

35 3
34 4

VCC

32

30
29

27
28

46
47

OSP

252 253

FOCUS/TRACKING COIL DRIVER,
SPINDLE, SLED MOTOR DRIVER

IC201

BUFFER

FOCUS COIL

DRIVE

TRACKING COIL

DRIVE

SLED MOTOR

DRIVE

SPINDLE MOTOR

DRIVE

BUFFER

OSN

CD/DVD RF AMP,

FOCUS/TRACKING ERROR AMP

DVD SYSTEM PROCESSOR

DIGITAL SERVO PROCESSOR

43

10
13

40

45

19
20
22
21

V1P4

FOO

TRO

FMO

DMO

IC102(1/2)

V1P4

FMO
FOO

DMO
TRO

38
42

37
41

30

40

47

211
210
170

FMO
FOO

DMO
TRO

V REFO

IOPMON

SPFG

MUTE123
MUTE
TSDM

PRST

IFCK

IFSDO

IFSDI

XIFCS

IFBSY

KRMOD/HSYNC

MIC/VSYNC

• Signal Path

: CD PLAY

: DVD PLAY

: SACD PLAY

110

99

98
101
100

105

207

205

26

MTK_RESET

33

MTK_CLK

32

MTK_SOD

31

MTK_SIO

27

MTK_XIFCK

28

MTK BUSY

24

KRMOD

25

MIC STATUS

SYSTEM

CONTROL

IC401(1/4)

HCD-GNZ77D/GNZ88D

27 27

HCD-GNZ77D/GNZ88D

6-2. BLOCK DIAGRAM — VIDEO SECTION —

YUV3
YUV2
YUV1
YUV4
YUV5
YUV6

WIDE

DSEL

VOICE

SMSCK

ASDAT0
ASDAT1
ASDAT2
ASDAT4

XRST

ACLK

ABCK

ALRCK

SDPIF

198
196
194
200
202
203

49
48

206
208

217
218
219
222

220
215
214
213

225

V
C
Y
YG
CR/B
CB/R

WIDE
DSEL

VOICE
SCORE

B

(Page 29)

A

(Page 29)

MAIN

SECTION

MAIN

SECTION

14

SDTI1

15

SDTI2

16

SDTI3

13

SDTI4

8

PDN

10

MCLK

9

BICK

17

LRCK

19

SCL

20

SDA

DIGITAL
OPTICAL

TRANSMITTER

IC508

D/A CONVERTER

IC301

(SW)

(DMIXL)

GNZ77D

DVD

DIGITAL

OUT

(SL)

(FC)

(FL)

LOUT2+
LOUT2–

LOUT3+
LOUT3–

ROUT3+
ROUT3–

LOUT4+
LOUT4–

LOUT1+
LOUT1–

GNZ77D

IC3731

46
45

IC3751 (1/2)

42
41

IC3751 (2/2)
40
39

IC3771

38
37

IC3711
2
1

SURROUND L

CENTER

SUBWOOFER

DOWNMIX L

FRONT L

C

(Page 29)

MAIN

SECTION

• Signal Path

: AUDIO

: VIDEO

: COMPONENT VIDEO

: DIGITAL

X101

27MHz

229

XTALI

XTALO

228

SCL

SDA

102

103

6 5

SCL

SDA

EEPROM

IC103

DVD SYSTEM PROCESSOR

IC102(2/2)

AD0 – AD7

81-84,86-88,91

HD0 – HD7 A0 – A21

DATA & ADDRESS BUS

DATA & ADDRESS BUS

HD0 – HD7

29,31,33,35,38,40,42,44 25-16, 10 -1, 48

DQ0 – DQ7

HIGHA0-7
IOA0-7, IOA18-IOA21
A16, A17

53-61, 67-72, 74-76,

78, 89, 92, 93

A0

A0 – A19DQ15/A-1

FLASH ROM

IC101

A1-A21

IOCS

IOWA

IOUE

77

79

66

CEWEOE

2,4,5,7,8,10,11,13,42,44,45,47,48,50,51,53

CE

OE

WE

2645

28OE11

CE

WE

RD0 – RD15

125-123, 121, 120, 118,

117, 115, 135, 133-128, 126

RD0 – RD15

RA0 – RA11

146, 147, 149-151,

158-160, 162, 164-166

22-26,

29-35

RA0 – RA11

SDRAM

IC104

RCLK

RCS

RWE

RAS

BA0

BA1

143

20

142

145 156 113 137 157

38

19

21

BS0

BS1

DRCLK

138

RCS

CAS

140

139

16

18

17

CAS

RAS

RWE

15

DQM0

39

DQM0

DQM1

37

DQM1

CKE

DRCKE

HCD-GNZ77D/GNZ88D

2828

6-3. BLOCK DIAGRAM — MAIN SECTION —

CENTER

C

ECHO AMP

IC1400

Q107–109

SUBWOOFER

SURROUND L

FRONT L

DOWNMIX L

5VOL1

6VOL2

7VO 3

29POOUT

21MCO

Q113,114

BIAS OSC

Q112

CAP CONTROL

Q120,121

B TRG CONTROL

Q118,119

A TRG CONTROL

Q122,123

J1402
VIDEO
INPUT

ANTENNA

J501

TV/SAT IN

J1400
MIC 1

J1450
MIC 2

HRPE901

FM 75Ω

COAXIAL

AM

VIDEO

AUDIO

HP901

PB

HEAD

REC/PB

HEAD

ERASE
HEAD

MECHANISM

BLOCK

REC(REV)

REC(FWD)

CAP M+

B TRGM+

A TRGM+

L

R

L

R

(DECK A)

(DECK B)

TAPE

DECK

B SHUT
A SHUT

A HALF
B HALF

J501

J1402

TU901

R-CH

R-CH

Q154,

155

R-CH

R–CH

R–CH

5LCH
3RCH
4+9V

8DO
6DI
7CL
9CE
1TUNED

DIN
DOUT
CLK
CE

TUNED

VIDEO

SECTION

(Page 28)

R–CH
ST A+9V

T101

15 MIC1P

16 MIC2P

MUTE CONTROL

MUTE

Q285

RV1401

MIC2

LEVLE

RV1401

ECHO LEVEL

MIC AMP

IC1401

BIAS+9V

MUTE

MUTE

Q235

Q236

RV1401

MIC1

LEVLE

MUTE

Q166

MUTE CONTROL

Q110,111

AUDIO

SECTION

(Page 30)

MUTE

Q238

MUTE CONTROL

D

MUTE

Q237

MUTE

Q175

Q301,302

NSP MUTE

SOFT MUTE

DVD/CD MUTE

INIT

CONTROL
Q307,308

REC/PB AMP,

SOUND CONTROL

IC101

57 FRONT

4

DVD/CD

TU–LCH

3

5

LINE

2

VIDEO

59

MIC

75

PB A

76

PB B

17

REC

34

CLK

35

DATA

37

DIN

39

DOUT

38

CLK
36
40

34

83
84

23

90
89
63
91

20
21
18
19
17

12

10

ST
CE
TUNED

DVD A MUTE

DATA
CLK

MIC DETECT

B SHUT
A SHUT
A HALF
B HALF

SIGNAL IN/OUT CONTROL

7

REC MUTE
REC BIAS
TC REALY
CAMP CNT
B TRIG
A TRIG

SM INIT

9

SM NSP MUTING

SM SOFT MUTING

SURR CHANNEL

SYSTEM

CONTROL

IC401 (3/4)

IC403

29 5VRSW

23 12TONE L
42TONE R

28FRONT L
37FRONT R

26F/B

7MUSIC L+R

53L+R LIGHTING

SW CHANNEL

SELECT

SELECT

R–CH

R–CH

DBFB

FEED BACK

Q101

1

2

88VACS IN

66IO EXP DATA OUT
68IO EXP RST
69IO EXP CLK
70IO EXP LAT

22VIDEO OUT SW
21VIDEO MUTE

24FAN CNT
22ADC RESET

2RESET
3CLK
4LATCH

26D1

SELECT
SWITCH

Q260

DATA

RST
CLK
LAT

RST
CLK

LAT

DATA

SELECT

SWITCH

Q261

GNZ77D

JW261

SIGNAL SELECT

IC205

Z1

3

Z0
Z–Z1

9

X1

13

X0
X–X1

11

AUDIO

SECTION

(Page 30)

VIDEO

SECTION

(Page 28)

14X

GNZ88D

B

HCD-GNZ77D/GNZ88D

CENTER

SW OUT

SL OUT

FRONT L

ADC RESET

DBFB FEED BACK

FAN

DRIVE

Q585

3
1

23
27
26
21

20

18

16

J503

SUB WOOFER

SW OUT

J506

D–LIGHT

SYNC OUT

SCORE

VOICE

FAN901

VIDEO SELECTOR

2

OUT

AUDIO

F

SECTION

(Page 30)

AUDIO

E

SECTION

(Page 30)

VIDEO

A

SECTION

(Page 28)

• Signal Path

: AUDIO

: TUNER

: PB (DECK A)

: PB (DECK B)

: REC (DECK B)

: VIDEO

: COMPONENT VIDEO

• R-CH is omitted due to same as L-CH.

IC1805

7

C

Y

J1902 (1/2)

VIDEO

J1902 (2/2)

Y

PB/C

PR/C

OUT

S VIDEO

OUT

B

R

J1900

COMPONENT

OUT

SOFT MUTE

CONTROL

Q305,306,311

4Z

MUSIC L+R

AC/DC CONVERTER

IC2000 (2/2)

MIC

AC/DC CONVERTER

IC2000 (1/2)

FAN DET

G

V
C
Y

YG

WIDE

CB/R

DSEL

CR/B

COMPARATOR

LIMIT VOICE

COMPARATOR

IC2002

FAN

DETECT

Q580,582

FAN

CONTROL

Q584

75 OHM DRIVER

CVBS IN

4
2

C–IN

6

Y–IN

10

CY–IN

25

S1

12

CB–IN

9

I/P

14

CR–IN

3

MUTE1

13

MUTE2

MUTE

Q263,264

DETECT

IC2001

IC1801

CVBSOUT

S–DC OUT

UNREG+12V

C OUT
Y OUT

CYOUT

CB OUT

CR OUT

HCD-GNZ77D/GNZ88D

29 29

HCD-GNZ77D/GNZ88D

6-4. BLOCK DIAGRAM — AUDIO SECTION —

MAIN

SECTION

(Page 29)

E

DBFB FEED BACK

FRONT L

ADC RESET

SL OUT

SW OUT

CENTER

X1

12.288MHz

• Signal path
: AUDIO
: DIGITAL

R-CH

R-CH

SERIAL CLOCK

BUFFER

IC3

A/D CONVERTER

L IN

1
2

R IN

15

SCKI

7

PDWN

A/D CONVERTER

1

L IN

2

R IN

15

SCKI

7

PDWN

A/D CONVERTER

1

L IN

2

R IN

SCKI

15

7

PDWN

IC11

IC12

IC13

M751

(LOADING)

M741

(TABLE)

D OUT

LRCK

BCK

D OUT

LRCK

BCK

D OUT

LRCK

BCK

RE701

DISC TRAY

ADDRESS

DETECT

12

10
11

12

10
11

GNZ88D

12

10
11

S751

OPEN/CLOSE

DETECT

IC731

TABLE

ADDRESS

SENSOR

M

M

IC803

CLOSE OPEN

IC701

LOADING

4

MOTOR

2

DRIVE

IC712

TABLE

4

MOTOR

2

DRIVE

Q731

D/A CONVERTER

IC500

11

OUTL1

9

OUTL2

6
4

48

14

45
43
41
39

18
19
21
22
23
27
37
38

18
19
21
22
23
27
38

48

11

9

41
39

SM SD

R–CH
R–CH

SERIAL CLOCK

BUFFER

IC800

R–CH
R–CH

GNZ77D

3
79
76
77
78
65
72

86
85

X800

49MHz

SUB WOOFER AMP

HP AMP

IC880

GNZ88D

IC812

OUTR1

31

DATA

29

LRCK

30

BCK

36

XFSIIN

31

DATA

29

LRCK

30

BCK

36

XFSIIN

41

OPEN SWITCH

43

E–3

44

E–2

45

E–1

42

TABLE SENSE

48

7

LM–F

9

49

LM–R

7

46

TM–F

9

47

TM–R

OUTR2

XFSOIN

XFSOOUT

HPOUTL1
HPOUTL2
HPOUTR1
HPOUTR2

NSPMUTE

SOFTMUTE

SCSHIFT

SCLATCH

FSOCKO

D/A CONVERTER

IC700

NSPMUTE

SOFTMUTE

SCSHIFT

SCLATCH

XFSOIN

OUTL1
OUTL2

HPOUTR1
HPOUTR2

SYSTEM CONTROL

IC401(2/4)

SM LATCH3
SM LATCH2
SM LATCH1

SCDT

INIT

FSOI

SCDT

INIT

FSOI

SM CLK

SM DATA

SM RESET

HP MUTE

HP DET

AMP (FRONT LCH)

PWM A

6

PWM B

14

D/A CONVERTER

31

DATA

29

LRCK

30

BCK

36

XFSIIN

14

XFSOOUT

18

NSPMUTE

19

SOFTMUTE

21

SCDT

22

SCSHIFT

23

SCLATCH

27

INIT

37

FSOCKO

38

FSOI

48

XFSOIN

IC530

IC600

INIT

NSP MUTE

SOFT MUTE

OUT A

OUT B

/RESET

OUTL1
OUTL2

OUTR1
OUTR2

SW OUT

/SD

28

l

30

25

l

27

4
5

11

9

6
4

F

D

R-CH
R-CH

MAIN

SECTION

(Page 29)

MAIN

SECTION

(Page 29)

DC DETECT

Q850,851

AMP (SURROUND)

4

PWM A

6

PWM B

6

PWM A

14

PWM B

DC DETECT

Q840

R-CH

R-CH

IC630

OUT A

OUT B

OUT C
OUT D

RESET AB
RESET CD

AMP (CENTER)

IC730

OUT A

OUT B

/RESET

TM1500 (1/3)

MUTE

Q1400,1401

MUTE CONTROL

Q486

33

30

25
22

3

/SD

5

15

28

l

30

25

l

27

4

/SD

5

R-CH
R-CH

L

R

D486

FRONT

SPEAKER

DC DETECT

Q860,861

DC DETECT

Q870,871

R-CH

UNREG+8V

FAN DET

R-CH
R-CH

G

TM1500 (2/3)

TM1500 (3/3)

MAIN

SECTION

(Page 29)

J1401

PHONES

GNZ88D

L

SURROUND

SPEAKER

R

CENTER

SPEAKER

HCD-GNZ77D/GNZ88D

3030