Sharp LC-30HV4E (serv.man2) Service Manual ▷ View online
50
LC-30HV4E
Pin No.
Pin Name
Type
Description
1
B/CbOUT
O
Amplifier output signal monitor
2
ADDRESS
I
I2C slave addressing
3
R/CrOUT
O
Amplifier output signal monitor
4
NC
––
Not used
5
NC
––
Not used
6
XPOWERSAVE
I
Power saving
7
DGNDREG
––
Resistor GND
8
DVCCREG
––
Resistor power supply
9
SDA
I
Control resistor data input
10
SCL
I
Control resistor clock signal input
11
XSENABLE
I
3-wire control resistor enable signal input
12
SEROUT
O
3-wire control resistor data read
13
3WIRE/I2C
I
12V bus mode and 3-wire bus mode select
15
AVCCADREF
––
ADC reference voltage power supply
16, 94
AVCCAD3
––
ADC analog power supply
17
VRT
O
ADC top reference voltage output
18, 92
DVCCAD3
––
ADC digital power supply
19, 32, 42, 54,
DVCCADTTL
––
ADC TTL output power supply
65,76,90
20, 33, 44, 55,
DGNDADTTL
––
ADC TLL output GND
67, 77, 89
21, 22, 24-28, 31
RA0~RA7
O
R channel port A data output
23, 30, 43, 50,
DGNDAD3
––
ADC digital GND
59, 66,7 9, 86
29, 80
AGNDAD3
––
ADC analog GND
34-41
RB0~RB7
O
R channel port B data output
45-49,
BA0~`BA7
O
B channel port A data output
51-53
56-58,
BB0~BB7
O
B channel port B data output
60-64
68-75
68-75
GA0~GA7
O
G channel port A data output
78, 81-85,
GB0~GB7
O
G channel port B data output
87,88
91
DVCCAD
––
ADC digital power supply
93
VRB
O
ADC bottom reference voltage output
95
AGNDADREF
––
ADC reference voltage GND
96
DVCCPLLTTL
––
PLL TTL output power supply
97
DGNDPLLTTL
––
PLL TTL output GND
98
XCLKCLK
O
CLK reverse output
99
1/2XCLK
O
CLK output
100
1/2CLK
O
I2CLK reverse output
101
DSYNC/
O
I2CLK output
103
DIVOUT
O
DSYNC signal outut/DIVOUT signal output
104
UNLOCK
O
UNLOCK signal output
105
SOGOUT
O
Input of sink signal of Sink-On-Green signal
106
HOLD
I
Phase comparison disable signal input
107
XTLOAD
I
Programmable counter reset
108
EVEN/ODD
I
ADC sampling clock inverse pulse input
109
XCLKIN
I
Negative test clock input
110
CLKIN
I
Positive test clock input
111
SYNCIN1
I
Sink signal input 1
112
SYNCIN2
I
Sink signal input 2
113
CLPIN
I
Clamp pulse input
114
DVCCPLL
––
PLL digital power supply
115
DGNDPLL
––
PLL digital GND
116
AVCCVCO
––
PLL VCO analog power supply
117
AGNDVCO
––
PLL VCO analog GND
118
RC1
––
External PLL loop filter
119
RC2
––
External PLL loop filter
120
AVCCIR
––
IREF analog power supply
121
IREF
I
Current input
123
AGNDIR
––
IREF analog GND
124
G/YIN1
I
G/Y signal input 1
125
AVCCAMPG
––
G/Y amplifier power supply
126
G/YIN2
I
G/Y signal input 2
127
AGNDAMPG
––
G/Y amplifier power supply
128
G/YCLP
––
Brightness clamp capacitor connection
129
B/CbCLP
––
Brightness clamp capacitor connection
130
R/CrCLP
––
Brightness clamp capacitor connection
132
SOGIN1
I
Sink-On-Green signal input 1
133
B/CbIN1
I
B/Cb signal input 1
134
AVCCAMPB
––
B/Cb amplifier power supply
135
SOGIN2
I
Sink-On-Green signal input 2
136
B/CbIN2
I
B/Cb signal input 2
137
AGNDAMPB
––
B/Cb amplifier GND
Ë
9DK001-15079 (CXA3506R) (ASSY:IC4)
3-channel, 8-bit, 120MSPS A/D converter amplifier PLL
»
Pin mapping
51
LC-30HV4E
Pin No.
Pin Name
Type
Description
139
R/CrIN1
I
R/Cr signal input 1
140
AVCCAMPR
––
R/Cr amplifier power supply
141
R/CrIN2
I
R/Cr signal input 2
142
AGNDAMPR
––
R/Cr amplifier GND
143
G/YOUT
O
Amplifier output signal monitor
144
DACTEST
O
Input for testing amplifier control resistor DAC
14, 102, 122,
OUTDPGND
––
131, 138
52
LC-30HV4E
Power cannot be turned on. (The power LED on the front panel does not light up).
AVC System
Is the power cable connected properly?
Is fuse (F701) in order?
Is the BU+5V line (pin 1 of P1703) in order?
Are the wire harness and FFC connected properly?
Are DC/DC converter outputs and MOS-FET (Q1707 and
Q1708) in order?
Q1708) in order?
Replace IC1703.
Does the voltage of the OVP line (pin 8 of P1702) fluctuate
after power-on?
after power-on?
Plug the power cable connector and retry to turn on the
power.
power.
Replace the fuse and retry to turn on the power. If the fuse burns,
check VA701, D701 and IC701 and replace if necessary.
check VA701, D701 and IC701 and replace if necessary.
Check the BU+5V line for correct impedance. (Measure the
resistance between Pin 1 and GND).
resistance between Pin 1 and GND).
Check connections of the wire harness and FFC and
reconnect if necessary.
reconnect if necessary.
Check power supply internal devices (IC701, IC72, PC702,
Q702, D708 and D705).
Q702, D708 and D705).
Check DC/DC converter output lines and MOS-FET (Q1707
and Q1708) and replace if necessary.
and Q1708) and replace if necessary.
The power does not turn on even through the power button is pressed. (The red power LED on the front panel does not turn green or
is blinking red).
is blinking red).
Remove the cause of fault or
short-circuit.
short-circuit.
Check IC1702 and its
peripheral circuits.
peripheral circuits.
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Is the system cable connected properly between the Display
and the AVC System (between DISPLAY OUTPUT(1)’s)?
and the AVC System (between DISPLAY OUTPUT(1)’s)?
Reconnect and retry to turn on the power.
Are the power switches of the Display and AVC System on?
Turn on the power switches of the Display and AVC System.
Are the UR+6V, UR+10V and UR+13V lines (pins 1, 2, 7 and
9 of P1702) in order?
9 of P1702) in order?
Are the D+1.8VCV line (pins 5 and 6 of P1701), D+3.3V line
(pin 8 of P1701), D+5V line (pin 1 of P1701) and A+5V line
(pin 3 of P1701) in order?
(pin 8 of P1701), D+5V line (pin 1 of P1701) and A+5V line
(pin 3 of P1701) in order?
Check the wire harness and FFC for proper connection.
Is PS_ON (pin 3 of P1702) pulled high (3.5V)?
Is D_POW (pins 32 and 34 of IC1703, pin 2 of IC1704 and
pin 2 of IC1705) pulled high?
pin 2 of IC1705) pulled high?
Is the impedance of the UR+6V, UR+10V and UR+13V lines
correct? (Measure the resistance between pins 1/2/7/9 of
P1072) and GND).
correct? (Measure the resistance between pins 1/2/7/9 of
P1072) and GND).
Check the PS_ON line.
Check the UR+6V, UR+10V and
UR+13V lines and devices on the
lines.
UR+13V lines and devices on the
lines.
Are MOS-FET (Q1707 and Q1708) and REG. IC (IC1704 and
IC1705) in order?
IC1705) in order?
Check the D_POW line (pin 6 of
IC1503).
IC1503).
Check each output line and replace MOS-FET (Q1707 and
Q1708) and REG. IC (IC1704 and IC1705).
Q1708) and REG. IC (IC1704 and IC1705).
Replace IC1703.
TROUBLE SHOOTING TABLE
53
LC-30HV4E
No sound (1)
No sound (2)
A
VC System
No sound (3)
No sound is heard from the speaker in all modes.
Check audio circuits of the Display
.
Is the monitor audio output set to "V
ariable"? Or
Is the headphone connected?
Are the audio outputs of IC2501 (multi-sound
processor) in order?
Pins 36 and 37 of IC2501 (SC1 OUT
L/R).
Check IC2501 (multi-sound processor) and its
peripheral circuits.
Check lines and devices between pins 36/37 of
IC2501 and pins 1/3 of the
A
V
unit connector
(P2502). (Q2504-5, Q2509-10 and Q2513-4)
Set the monitor audio output to "Fixed".
Remove the headphone.
The speaker generates no sound when audio signals are inputted from an external device or a PC.
Check IC1301 (A
switch) and its peripherals.
Are the audio outputs of IC1301 (A
V switch) in
order?
Pins 52 and 54 of IC1301 (TV MAIN OUT
L/R)
Are the audio inputs of IC1301 (A
V switch) in
order?
Input 1: Between pins 2 and 4 of IC1301
Input 2: Between pins 9 and 1
1
of IC1301
Input 3: Between pins 16 and 18 of IC1301
Input 4: Between pins 23 and 25 of IC1301
PC input: Between pins 29 and 31 of IC1301
Are the audio input circuits of IC1301 (A
V switch)
in order?
Input 1: Between pins 6/2 and pins 2/4 of IC1301
Input 2: Between pins 6/2 and pins 9/1
1 of IC1301
Input 3:
Between pins 6/2 and pins 16/18 of IC1301
Front panel input: Between J2404 and pins 23/25
of IC1301
PC input: Between J2403 and pins 29/31 of IC1301
Are the audio inputs of IC2501 (multi-sound
processor) in order?
Pins 56 and 57 of IC2501 (SCI IN1 L/R)
YES
NO
YES
YES
YES
NO
NO
NO
No audio output <Input1>
No audio output <INPUT2/3>
Has the input mode been selected on the Input Select screen?
Are the audio outputs of IC2501 (multi-sound
processor) in order?
Pins 27 and 28 of IC2501 (DRCM L/R)
Check lines and devices between pins 27/28 of
IC2501 and pins 3/1 of INPUT1.
Also check the
audio mute circuits.
(IC2504, Q1
101-2)
Are the audio outputs of IC1301 (A
V switch) in
order?
Pins 43 and 45 of IC1301 (SC1
TV SUB OUT
L/R)
Check lines and devices between pins 43/45 of
IC1301 and pins 3/1 of INPUT2/3.
Also check
the audio mute circuits.
(IC1301, Q1
104-7 and Q1
109-12)
No monitor audio output or abnormal audio
The audio level is abnormal:
Is the monitor audio output set correctly?
"V
ariable" or "Fixed"
NO
YES
No sound at all:
Are the audio outputs of IC2501 (Multi-sound
processor) in order?
Pins 34 and 33 (SC2 OUT
L/R) of IC2501
Check lines and devices between pins 34/33 of
IC2501 and the monitor output (J1
101).
Also
check the audio mute circuit.
(Q2502-3, Q1
1
14-5 and Q1
106-7)
YES
Check peripherals of the SR unit DISPLA
Y
OUTPUT
2 pin (SC6000).
YES
YES
YES
YES
YES
Are audio signals applied to the
A
V
unit
connectors (pins 1 and 3 of P2502)?
YES
The speaker generates no sound when
TV signal is received.
Are the tuner audio inputs of IC2501 (multi-sound
processor) in order?
Pin 67 (sound IF1) of IC2501
Pin 69 (sound IF2) of IC2501
Is the audio signal applied to tuner output pin 21?
Check B.P
.F
. of SIF1 and SIF2.
(Q1
1
19-20 and Q1
121-2)
Check IC2501 (multi-sound processor) and its
peripheral circuits.
YES
YES
NO
NO
Check
TU1
101 (U/V tuner) and its peripherals.
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