DOWNLOAD Sony HCD-GN999D / MHC-GN999D / MHC-GN999DS Service Manual ↓ Size: 7.16 MB | Pages: 103 in PDF or view online for FREE

Model
HCD-GN999D MHC-GN999D MHC-GN999DS
Pages
103
Size
7.16 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gn999d-mhc-gn999d-mhc-gn999ds.pdf
Date
PREV: Sony CMT-SPZ90DB / HCD-SPZ90DAB Service Manual

Sony HCD-GN999D / MHC-GN999D / MHC-GN999DS Service Manual ▷ View online

21
HCD-GN999D
SECTION 5
MECHANICAL ADJUSTMENTS
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
Torque meter
Meter reading
2.9m N • m to 6.9m N • m
FWD
CQ-102C
30 to 70 g • cm
(0.42 – 0.97 oz • inch)
FWD
0.15m N • m to 0.59m N • m
back tension
CQ-102C
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
 2.9m N • m to 6.9m N • m
REV
CQ-102RC
30 to 70 g • cm
(0.42 – 0.97 oz • inch)
0.15m N • m to 0.59m N • m
REV
CQ-102RC
2 to 6 g • cm
back tension
(0.03 – 0.08 oz • inch)
4.8m N • m to 16.7m N • m
FF/REW
CQ-201B
49 to 170 g • cm
(0.68 – 2.36 oz • inch)
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.
To return to the Top Menu of Remocon Diagnosis Menu, press
[0] on the remote commander.
Version information
 
O  Return to Top Menu
Firm (Main) :  Ver. xxxxx
Firm (Sub) :  xxxxx
RISC :   xxxxx
8032 :   xxxxx
Audio DSP :  xxxxx
Servo DSP :  xxxxx
22
HCD-GN999D
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.
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.
DVD SECTION
When the base unit is replaced, perform the IOP measurement.
(Refer to page 19)
[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:
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)
+
–
CN105 pin 
6
 (RFMON)
CN105 pin 
3
 (GND)
oscilloscope 
DMB15 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
DMB15 BOARD (SIDE A)
oscilloscope
set
J1902
VIDEO OUTPUT
75 
Ω
1.00 
±
 0.07 Vp-p
(WHITE 100%)
Ver. 1.1
23
HCD-GN999D
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
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.)
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
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
MAIN board
CN111
Pin 1 (L-CH)
Pin 3 (R-CH)
MAIN board
CN111
Pin 2 (GND)
+
–
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
MAIN
board
CN111
test tape
P-4-A063
(6.3 kHz, –10 dB)
pin 2
oscilloscope
L-CH
R-CH
set
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
pin 3
pin 1
L
R
forward
reverse
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.
screw
position
L-CH
peak
within
1dB
output
level
L-CH
peak
R-CH
peak
within
1dB
screw
position
R-CH
peak
24
HCD-GN999D
MEMO
Page of 103
Display

Click on the first or last page to see other HCD-GN999D / MHC-GN999D / MHC-GN999DS service manuals if exist.

RANDOM: