Sony CMT-NEZ3 / CMT-NEZ5 / HCD-NEZ3 / HCD-NEZ5 (serv.man3) Service Manual ▷ View online
9
HCD-NEZ3/NEZ5
3.
TEST MODE
The second digit from the left indicates:
(Error history No. display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
(Error history No. display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display
Status
0
1
Not focused (TOC read without a disc)
0
2
GFS NG (TOC read with a disc chucked)
0
3
Start operation time-over
0
4
Defocused continuously (Defocused during TOC reading)
0
5
Q code not entered for specified time
0
6
Tracking not turned ON
0
7
Blank disc (Blank disc TOC read)
The 5th and 6th digit from the left indicates:
(Error step display)
The 5th and 6th digit from the left indicates which processing when
a trouble occurred
(Error step display)
The 5th and 6th digit from the left indicates which processing when
a trouble occurred
Display
Contents
0
1
Power OFF in progress
0
2
Power ON in progress
0
3
Initialize in progress
0
4
Oscillation stopping
0
5
From oscillation stop, oscillation starting
0
6
Stopping
0
7
Stop operation is under way
0
8
Start operation in progress
0
9
TOC read in progress
0
A
Search operation is under way
0
B
Playback operation is under way
0
C
Pause operation is under way
0
D
Playback manual search operation is under way
0
E
Pause manual search operation is under way
The 7th and 8th digit from the left indicates:
The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)
The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)
CD POWER MANEGE
This mode is for switch the CD power supply on/off. Even if this
state pulls out AC plug, it is held.
Procedure:
state pulls out AC plug, it is held.
Procedure:
1. Press the
I/
1
button to turn the power on.
2. Set the FUNCTION to CD.
3. Press the
3. Press the
I/
1
button again to turn the power off (standby).
4. While pressing the
CD
u
button, press the
I/
1
button.
5. If turns power on and display “CD POWER”, then display
“ON” or “OFF”.
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:
RAM to initial conditions. Execute this mode when returning the
set to the customer.
Procedure:
1. Press the
I/
1
button to turn the power on.
2. While pressing the
x
button, press the
I/
1
button and turn
the [VOLUME] knob in the counter-clock wise.
3. The message “RESET” is displayed and the set is reset.
PANEL TEST
All segments of liquid crystal display are tested, and the version
and released date of the micro computer are displayed.
Procedure:
and released date of the micro computer are displayed.
Procedure:
1. Press the
I/
1
button to turn the power on.
2. While pressing the [DSGX] button, press the
l
m
button
and turn the [VOLUME] knob in the counter-clock wise.
Then all segments of liquid crystal display are turned on.
3. Press the [DSGX] button, the version and released date of the
micro computer are displayed.
example of display:
example of display:
4. Press the [TUNER/BAND] button, the model name and
distination are displayed.
example of display:
example of display:
5. Press the [PLAY MODE/TUNING MODE] button, “KEY 0 0” is
displayed on the liquid crystal display, and key test mode in.
Each time a key is pressed, the numerical value corresponding
to each key is displayed on the liquid crystal display.
Each time a key is pressed, the numerical value corresponding
to each key is displayed on the liquid crystal display.
6. To exit from this mode, perform the “COLD RESET”.
CD ERROR HISTORY
When this mode is entered, optical pick-up error code is displayed
with the 8-character format on the fluorescent indicator tube.
Procedure:
with the 8-character format on the fluorescent indicator tube.
Procedure:
1. Set the FUNCTION to CD.
2. While pressing the [DSGX] button, press the
2. While pressing the [DSGX] button, press the
CD
u
button
and turn the [VOLUME] knob in the counter-clock wise.
3. CD error history is displayed on the liquid crystal display.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
liquid crystal display.
The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
liquid crystal display.
1104 V104
Version of micro computer
(In this case, version 104)
(In this case, version 104)
released date of micro computer
(In this case, released of November 4)
(In this case, released of November 4)
6NE NA
distination
(In this case, North American model)
(In this case, North American model)
model name
(In this case, HCD-NEZXX)
(In this case, HCD-NEZXX)
10
HCD-NEZ3/NEZ5
4.
ELECTRICAL ADJUSTMENTS
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.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Record/Playback/Erase Head
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
•
Test Tape
Tape
Signal
Used for
P-4-A063
6.3 kHz, -10 dB
Azimuth Adjustment
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note:
Remove the cassette lid assy before this adjustment.
Procedure:
1. Mode: Playback
0 dB=0.775 V
DECK SECTION
set
HEAD PHONE board
PHONES jack
(J500)
PHONES jack
(J500)
+
–
–
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
set
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
oscilloscope
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
HEAD PHONE board
PHONES jack
(J500)
PHONES jack
(J500)
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
11
HCD-NEZ3/NEZ5
CD SECTION
Note:
1.
CD Block is basically constructed to operate without adjustment.
2.
Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10 M
Ω
impedance.
4.
Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
5.
Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect oscilloscope to TP (RFACI) and TP (VC) on the CD
board.
2. Press the
I/
1 button to turn the power ON.
3. Set disc (YEDS-18) on the tray and press the
CD
u button
to playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
Checking Location:
+
–
–
CD board
TP (RFACI)
TP (VC)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
0.9
0.9
±
0.4 Vp-p
TP
(VC)
TP
(RFACI)
IC201
– CD Board (Conductor Side) –
12
HCD-NEZ3/NEZ5
MEMO
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