Sharp FV-DB1E (serv.man3) Service Manual ▷ View online
FV-DB1E
2 – 1
Audio
FV-DB1E
Service Manual
FV-DB1E
Market
E
CHAPTER 2.
ADJUSTMENTS
[1] Tuner section
fL: Low-range frequency
fH: High-range frequency
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
• FM Detection
Signal generator: 10.7 MHz FM sweep generator
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
*1 Input: Antenna Output: Pin 23 of IC301
[2] How to check the version number of the
system microcomputer
system microcomputer
1. Turn the power off.
2. With holding down "PRESET SELECT" and "PRESET2" buttons,
turn the power on.
3. The version number displays as below.
Version number display
Frequency
Display
Check
Point
Instrument
Connection
87.5 MHz
87.5 MHz
1.5 V
± 1.0 V
TP-VT
108 MHz
108 MHz
5.0 V
± 1.0 V
TP-VT
Frequency
Display
Instrument
Connection
98.00 MHz
98.00 MHz
Input: Antenna
Output: Speaker Terminal
Output: Speaker Terminal
Test
Srage
Frequency
Frequency
Display
Instrument
Connection
FM IF
10.7 MHz
98.00 MHz
Input: Pin 36 of IC301
Output: Pin 23 of IC301
Output: Pin 23 of IC301
Test
Srage
Frequency
Frequency
Display
Setting/
Adjustment
Parts
Instrument
Connection
FM Band
Coverange
Coverange
—
87.50 MHz
(fL): L307
1.5
1.5
± 0.1 V
*1
FM RF
98.00 MHz
(10 ~ 20 dB)
(10 ~ 20 dB)
98.00 MHz
L304
*1
Figure 1 ADJUSTMENT POINTS
L304
R311
L307
TP-VT
FM RF
FM BAND
COVERANGE fL
36
23
IC301
TUNER PWB
Ver. 08C
← Version number of the system microcom-
puter
SHP_SER_V1. 7. 2
← Version number of DAB module
FV-DB1E
2 – 2
— M E M O —
FV-DB1E
3 – 1
Audio
FV-DB1E
Service Manual
FV-DB1E
Market
E
CHAPTER 3.
MECHANISM BLOCKS
[1] Caution on disassembly
Caution on Disassembly
Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure excellent performance:
1. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit.
2. Take off nylon bands or wire holders where they need to be removed when disassembling the unit. After servicing the unit, be sure to rearrange
the leads where they were before disassembling.
1
Front Panel
1. Screw .................... (A1) x2
2. Screw .................... (A2) x4
2
Display PWB
1. Screw ......................
.....................
(B1) x4
2. Socket
(B2) x5
.....................
5. Socket
(C5) x3
....................
4. Bracket
(C4) x1
.....................
3. Socket
(A3) x3
3
Power PWB/
DC Jack PWB
Tuner PWB
3. Screw ...................... (C3) x3
2. Cover
(C2) x1
1. Screw ......................
......................
(C1) x1
4
2. Screw ...................... (D2) x1
3. Screw ...................... (D3) x2
4. Screw ...................... (D4) x2
1. Tip ........................... (D1) x1
5. Socket .....................
2. Socket .....................
(D5) x1
......................
5
Main PWB
1. Screw ...................... (E1) x2
6
Switch A PWB
1. Screw ...................... (F1) x2
(F2) x1
7
Switch B PWB
1. Screw ...................... (G1) x4
2. Screw ...................... (G2) x4
8
Power Switch
PWB
1. Screw
(H1) x2
STEP
REMOVAL
PROCEDURE
(A1)x2
φ3x12mm
(A2)x4
φ3x12mm
Rear Cabinet
Front Panel
(B1)x4
φ3x10mm
Rear Cabinet
Display PWB
(B2)x1
(B2)x1
(A3)x1
(D4)x2
φ3x10mm
(C3)x2
φ3x10mm
(C3)x1
φ3x10mm
(D2)x1
φ3x10mm
(D3)x2
φ3x12mm
(E1)x2
φ3x8mm
(B2)x1
(A3)x1
(D1)x1
(D5)x1
(C5)x1
(A3)x1
(C2)x1
(B2)x1
(C5)x2
(C4)x1
(B2)x1
Rear Cabinet
DC Jack
PWB
Power
PWB
Tuner PWB
Bracket, Earth
Main PWB
(C1)x1
φ3x10mm
Terminal A
PWB
Terminal B
PWB
Front
Panel
(G1)x2
φ2.6x8mm
(H1)x2
φ2.6x8mm
Switch B PWB
Button, Function
Button, Preset
Switch A PWB
Power Switch
PWB
SP601
SP602
(G2)x4
φ2.6x8mm
(F1)x2
φ2.6x8mm
(G1)x2
φ2.6x8mm
(F2)x1
FV-DB1E
4 – 1
Audio
FV-DB1E
Service Manual
FV-DB1E
Market
E
CHAPTER 4.
DIAGRAM
[1] Block diagram
BF301
36
14
17
3
18 20 19
3 4
10 2
5
16
15
15
21
22
22
31
32
32
12
1
1
2
2
3
3
9
43
36
2
25
49
5
18
19
19
1
2
2
4 6 7 10 11 13 14 20
35
16 17
18
6
4
1
3
GND1
VSS
GND2
33
21
12
13
13
11
14
12
13
13
3
2
1
9V
IC301
LV23002M
FM FRONT END/PLL (TUNER)/
FM IF DET./FM MPX./AM IF
IC103
5V
VCC1 VCC2
5V
3.3V
ZD308
VDD
L-OUT
R-OUT
R-OUT
DI CL DO
15
CE
TUN1
DAB
3.3V
DAB
5V
AAVD_L
AAVD_R
SI_DOUT
SI_DIN
39
SCP_CLK
SI_DOUT
23 SCP_CLK
RESET
PWE_DET
PWE_DET
SI_DIN
S/PDIF_DUT
DAB
3.3V
DO
CLK
DI
PLL_CE
VOL_CE
VDD2
VDD1
VSS2
VSS1
STB
STB
SCK DATA
VSS
1
6 7
VDD
3.3V
LCD1
DAB POWE
IC401
IXA021SJ
SYSTEM
MICROCOMPUTER
TX101
LC
PRO
FM_L
FM_R
FM_R
DAB_L
DAB_R
DAB_R
IC404
PST9127
RESET
9V
1
2
3
IC402
PST9119
RESET
3.3V
FM ROD
ANTENNA
KIA7805P
VOLTAGE
REGULATOR
SW401~SW411
SW413~SW418
Figure 4-1 BLOCK DIAGRAM (1/2)
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