Sony HCD-GNZ7D / HCD-GNZ8D / HCD-GNZ9D / MHC-GNZ7D / MHC-GNZ8D / MHC-GNZ9D Service Manual ▷ View online
25
HCD-GNZ7D/GNZ8D/GNZ9D
SECTION 5
MECHANICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
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
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
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)
Mode
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
FWD
FWD
back tension
back tension
REV
REV
back tension
back tension
FF/REW
FWD tension
REV tension
26
HCD-GNZ7D/GNZ8D/GNZ9D
SECTION 6
ELECTRICAL ADJUSTMENTS
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.
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±0.07Vp-p.
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.
DVD SECTION
When the base unit is replaced, perform the adjustment and the
measurement as shown below in this order.
measurement as shown below in this order.
1) MIRROR TIME ADJUSTMENT (See page 22)
2) EXECUTING IOP MEASUREMENT (See page 24)
2) EXECUTING IOP MEASUREMENT (See page 24)
[TEST DISC LIST]
Be sure to use the DVD disc that matches the signal standards of
your region.
• CD
your region.
• CD
YEDS-18 (Part No.: 3-702-101-01)
PATD-012 (Part No.: 4-225-203-01)
PATD-012 (Part No.: 4-225-203-01)
• DVD SL (Single Layer)
NTSC : HLX-503 (Part No.: J-6090-069-A)
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)
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:
Procedure:
1. Connect an oscilloscope to CN105 pin 6 (RFMON) and
CN105 pin 3 (GND) on the DMB10 board.
2. Turn the power on.
3. Set the test disc (refer to the TEST DISC LIST) on the tray
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: DMB10 board (Side A)
+
–
–
CN105 pin
6
(RFMON)
CN105 pin
3
(GND)
oscilloscope
DMB10 board
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
RFMON signal waveform
level: 0.58
±
1.23 Vp-p (DVD)
0.57
±
1.1 Vp-p (CD)
IC102
IC101
IC104
IC201
CN105
CN106
CN105 pin
3
(GND)
CN105 pin
6
(RFMON)
1
6
oscilloscope
set
J802
VIDEO OUTPUT
VIDEO OUTPUT
75
Ω
1.00
±
0.07 Vp-p
(WHITE 100%)
Ver. 1.1
27
HCD-GNZ7D/GNZ8D/GNZ9D
0 dB=0.775 V
DECK SECTION
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
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.)
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
Record/Playback Head Azimuth Adjustment
Note:
Perform this adjustments for both decks
Procedure:
1. Mode: Playback
1. Mode: Playback
Tape
Signal
Used for
P-4-A063
6.3 kHz, –10 dB
Azimuth Adjustment
DECK A DECK B
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
set
AUDIO board
IC201
Pin 28 (L-CH)
Pin 37 (R-CH)
IC201
Pin 28 (L-CH)
Pin 37 (R-CH)
AUDIO board
IC201
Pin 38 (GND)
IC201
Pin 38 (GND)
+
–
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
AUDIO
board
IC201
board
IC201
test tape
P-4-A063
(6.3 kHz, –10 dB)
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
forward
forward
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.
so that outputs match within 1dB of peak.
screw
position
position
L-CH
peak
peak
within
1dB
1dB
output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
screw
position
position
R-CH
peak
peak
Ver. 1.1
28
HCD-GNZ7D/GNZ8D/GNZ9D
SECTION 7
DIAGRAMS
• IC PIN Descriptions
IC101 M30392MEP-A00FPU (SYSTEM CONTROL) (PANEL BOARD (2/2))
Pin No.
Pin Name
I/O
Pin Description
1
61537 CLK
O
TA device control serial clock signal output
2
61530 CLK
O
TA device control serial clock signal output
3
TA DATA
O
TA device control serial data signal output
4
STANDBY LED
O
Standby LED control signal output
5
VIDEO OUT SW
O
Video out switch control signal output “H”: VIDEO
6
VIDEO MUTE
O
Video mute signal output “L”: VIDEO
7
SIRCS
I
Remote control signal input
8
VACS2
I
VACS signal input
9
CN VSS
—
Connector ground pin
10
X CIN
I
Sub clock signal input (32.768 kHz)
11
X COUT
O
Sub clock signal output (32.768 kHz)
12
RESET
I
Reset signal input
13
XOUT
O
Main clock signal output (16 MHz)
14
VSS
—
Ground pin
15
X IN
I
Main clock signal input (16 MHz)
16
VCC1
—
Power supply pin (+3.3 V)
17
P85
I
Pull up (EVER+3.3 V)
18
ILLUMI 1/4
O
Illumination on/off control signal output “H”: On
19
ST TUNED
I
ST tuned signal input
20
AC CUT
I
AC cut signal input
21
ILLUMI CTRL
O
Illumination control signal output
22
DVD POWER
O
DVD power supply control signal output
23
MTK RESET
O
MTK reset signal output
24
MTK BUSY
O
MTK busy signal output
25
I2C CLK
I/O
I2C serial clock signal input/output
26
I2C DATA
I/O
I2C serial data signal input/output
27
MTK OUT
O
MTK serial data signal output
28
MTK IN
I
MTK serial data signal input
29
MTK CLK
I
MTK serial clock signal input
30
MTK CS
I
MTK chip select signal input
31 to 43
G13 to G1
O
Grid and segment control signal output
44 to 51
P1 to P8
O
Grid and segment control signal output
52
VEE
—
Power supply pin
53 to 61
P9 to P17
O
Grid and segment control signal output
62
VCC2
—
Power supply pin (+3.3 V)
63
P18
O
Grid and segment control signal output
64
VSS
—
Ground pin
65 to 67
P19 to P21
O
Grid and segment control signal output
68
ST CE
O
Tuner chip enable signal output
69
ST DIN
I
Tuner data in signal input
70
ST DOUT
O
Tuner data out signal output
71
ST CLK
O
Tuner serial clock signal output
72
I/O VCC CONT
O
In/out power supply control signal output
73
I/O LATCH
O
In/out serial latch control signal output
74
WAKE UP0
I
Wake up signal input
75
I/O CLK
O
In/out serial clock control signal output
76
I/O DI1
O
In/out serial data control signal output
77
I/O RST
O
In/out reset signal output
78
TRG (B)
O
Tape mechanism logic (Trigger B) control signal output
79
TRG (A)
O
Tape mechanism logic (Trigger A) control signal output
80
ILLUMI 3/6
O
Illumination on/off control signal output “H”: On
81
ILLUMI 2/3
O
Illumination on/off control signal output “H”: On
82
PLAY SW (A) & (B)/
I
Head up switch detect signal input (A deck and B deck)
A-HALF
A deck HALF signal input
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