SD-SH111 (serv.man8). Adjustment - Sharp Audio Service Manual (repair manual)

sd-sh111 (serv.man8) service manual
Model
SD-SH111 (serv.man8)
Pages
11
Size
115.53 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / Adjustment
File
sd-sh111-sm8.pdf
Date

Read Sharp SD-SH111 (serv.man8) Service Manual online

SD-SH111
– 16 –
ADJUSTMENT
TO SPEAKER A 
PWB
TO DVD SERVO PWB
FROM FAN MOTOR
FROM
DISPLAY PWB
FROM
DVD PWB
TO DSP PWB
TO
1-BIT AMP. PWB
TO DSP PWB
FROM
HEADPHONES PWB
FROM
SUBWOOFER
OUT PWB
CP5001
CNS503
CNV01
CNP503
CNP505
CNP502
CNSE02
CP5002
CNPV02
CNP506
CNS306
CNP508
CNS101
CNP504
CNS505
CNS504
CNS506
CNP306
CNS106A
TO
1-BIT AMP. PWB
CNS106B
TO
1-BIT AMP. PWB
CNS106C
CNP101
FROM
POWER A PWB
TO MAIN PWB
FROM
1-BIT AMP. PWB
FROM
1-BIT AMP. PWB
FROM
1-BIT AMP.  PWB
FROM
1-BIT AMP. PWB
FROM
1-BIT AMP. PWB
FROM DISPLAY PWB
TO SPEAKER B PWB
CNP708
CNP709
CNP714
CNSE07
CNSA110F
CNSA110D
CNSA110B
CNSA111C
FROM
1-BIT AMP. PWB
CNSA111A
CNSA111B
CNP705
CNP707
CNP706
CNP701
CNP703
CNP702
CNP704
CNS902
CNP503
CNS503
• Adjustment preparation
After removing the rear panel, perform adjustment with connectors connected.
– 17 –
SD-SH111
TUNER SECTION
Frequency
Display
Adjusting
Parts
Instrument
Connection
98 MHz
98 MHz
VR1
Input: FM Antenna
(26dB)
Terminal
(EFM)
Output: Headphones
   Terminal
fL: Low-range frequency
fC: Middle-range frequency
fH: High-range frequency
• FM Mute Level
Signal generator: 400 Hz, 22.5 kHz, FM modulated
Turn the VR1 to set the volume to 26dB.
TEST MODE
When the tuner test mode is set, the initial setting of frequencies
is stored in the preset memory as shown in Table 1. For
details, refer to "8. Tuner test" on page 23.
The frequencies registered by the user will be changed when
the above setting is performed.
Table 1 Memory setting
Electronic 
Voltmeter
GND
FM Signal
Oscillator
Set
Headphones
Terminal
FM Antenna
Terminal
Figure 17-1
Figure 17-2
+
Set
AC 120 V
BIA110
Speaker
Output
Electronic
Voltmeter
VR : 0
Input : AUX
VRA101
R-CH
Output Offset Adjust
VRA100
L-CH
Output Offset Adjust
 1-bit amplifier's output offset voltage adjustment
Adjust VRA100 and VRA101 so that the DC voltage between
speaker terminals + and - is set to 0 
±
 5 mV.
Figure 17-3
Figure 17-4
 
DVD/CD SECTION
  Adjustment
Since this DVD/CD system incorporates the following
automatic adjustment functions, readjustment is not needed
when replacing the pickup. Therefore, different PWBs and
pickups can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.
VR1
TUNER UNIT
Preset
Memory
P1
87.50 MHz
P6
530 kHz
P2
108.00 MHz
P7
1,720 kHz
P3
90.00 MHz
P8
600 kHz
P4
106.00 MHz
P9
1,400 kHz
P5
98.00 MHz
P10
990 kHz
Frequency
FM
Preset
Memory
Frequency
AM
SD-SH111
– 18 –
TEST MODE
 Shifting to the test mode
If the POWER key on the main unit is pressed while the PLAY and VOLUME UP keys are held down in the power off state, the
unit enters the test menu mode. “SH111” is displayed at the top of the FL, and “Ver. 
∗∗∗∗
” (
∗∗∗∗ 
shows version No.) at the bottom.
Then, press the VOLUME UP or DOWN key to select the test mode, and determine it with the PLAY key. If direct keys are pressed
on the remote control while the version number is displayed, the unit enters the specified test mode directly.
No.
Display
1
 Shipment Test Mode
“1” of ten-key keypad
INITIAL
2
DVD TEST
“2” of ten-key keypad
TONE
3
AMP TEST
“3” of ten-key keypad
AMP
4
KEY TEST
“4” of ten-key keypad
KEY
5
DVD MECHA TEST
“5” of ten-key keypad
MECHA
6
DVD ROM WRITE TEST
“6” of ten-key keypad
DVD ROM
7
TUNER TEST
“7” of ten-key keypad
TUNER
Direct Key
Test Mode
  In each test mode, “TEST” appears at the top of the FL and that shown under “Display” of the table above at the bottom.
Pressing the POWER key in the test mode will display COMPLETE for 1 second, and then cancels the test mode.
1. If the power failure occurs in each test mode, cancel the test mode and perform an operation to recover the electricity.
    (To reset the unit after the electricity resumes, be sure to write in irregular data for RAM check.)
 Canceling the test mode
Since the pickup semiconductor laser can easily damaged by 
the static electricity, handle the mechanism unit with care.
To prevent damage by the static electricity during 
transportation, the LD terminals are short-circuited at 2 points 
on the PWB. Unsolder them by a soldering iron after 
completing the connection. When you return the mechanism 
unit, solder the terminals again.
Notes for handling the mechanism unit
Soldering on the
mechanism PWB (two points)
DVD Motor PWB
4X
Flexible PWB
– 19 –
SD-SH111
1. Shipment Test Mode
Outline:
Initialization of EEPROM in the DVD unit
Function:
The unit is set to “Shipment”. (The state immediately after shipment)
- All the functions and conditions are initialized.
- Clear all of tuner preset memory
- Clock initialization
- Clearing DVD memory
- Resetting DVD memory
- Initialization of DVD mechanism
- Set the DVD mechanism as above.
Operation: When the unit enters the shipment test mode.
1. “TEST” flashes at the top of the FL, and “INITIAL” at the bottom.
2. When initialization is complete, “COMPLETE” appears in the FL before the unit exits the test mode, and then the
    power is turned off. If initialization fails, “INT ERR” appears in FL, and the unit stands by until the POWER key
    ispressed.
"INITIAL" display
I
I
N
T
I
A
L
M
O
C
P
L
E
T
E
"COMPLETE" display
Page of 11
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