Sharp 21HS-50 (serv.man8) Service Manual ▷ View online
25
21HS-50H
ICs ADDITIONAL INFORMATION:MSP34x5G (IC3001)
PMQFP44 package
CAPL_M
AHVSS
AGNDC
SC2_IN_L
SC2_IN_R
ASG
SC1_IN_L
SC1_IN_R
VREFTOP
MONO_IN
AVSS
RESETQ
I2S_DA_IN2
DVSS
DVSUP
ADR_CL
I2S_DA_IN1
I2S_DA_OUT
I2S_WS
I2S_CL
I2C_DA
I2C_CL
NC
SC1_OUT_L
SC1_OUT_R
VREF1
NC
AHVSUP
DACM_L
DACM_R
VREF2
NC
NC
ANA_IN1
+
ANA_IN
−
TESTEN
XTAL_IN
XTAL_OUT
AVSUP
TP
D_CTR_I/O1
D_CTR_I/O0
ADR_SEL
STANDBYQ
MSP 34x5G
34
35
36
37
38
39
40
41
42
43
44
22
21
20
19
18
17
16
15
14
13
12
1
2
3
4
5
6
7
8
9
10 11
33 32 31 30 29 28 27 26 25 24 23
Simplified functional block diagram of MSP 34x5G
Sour
ce
Select
Loud-
SCART1
SCART1
SCART2
MONO
De-
modulator
speaker
Sound
Processing
DAC
ADC
Loud-
DAC
ADC
Sound IF1
speaker
I
2
S
I
2
S1
I
2
S2
Pre-
processing
Prescale
Prescale
SCART
DSP
Input
Select
SCART
Output
Select
26
21HS-50H
WAVEFORM MEASUREMENT CONDITION:
Colour bar genetator signal of 70 dB from RF input.
Colour bar genetator signal of 70 dB from RF input.
DESCRIPTION OF SCHEMATIC DIAGRAM
1. The unit of resistance «ohm»is omitted (K=1000
ohms. M= Megaohm).
2. All resistors are 1/16 watt. unless otherwise noted.
3. All capacitors are
ohms. M= Megaohm).
2. All resistors are 1/16 watt. unless otherwise noted.
3. All capacitors are
µ
F, unless otherwise noted (P=
µµ
F).
4. The capacitor with Part No. RC-FZ9XXXBMNJ is
designed to with stand 63V.
5. The capacitor with Part No. RC-FZ4XXXBMNJ is
designed to with stand 50V.
designed to with stand 63V.
5. The capacitor with Part No. RC-FZ4XXXBMNJ is
designed to with stand 50V.
NOTE:
SERVICE PRECAUTION:
THE AREA ENCLOSED BY THIS LINE ( )
IS DIRECTLY CONNECTED WITH AC MAINS
VOLTAGE.
WHEN SERVICING THE AREA, CONNECT AN
ISOLATING TRANSFORMER BETWEEN TV
RECEIVER AND AC LINE TO ELIMINATE
HAZARD OF ELECTRIC SHOCK.
IS DIRECTLY CONNECTED WITH AC MAINS
VOLTAGE.
WHEN SERVICING THE AREA, CONNECT AN
ISOLATING TRANSFORMER BETWEEN TV
RECEIVER AND AC LINE TO ELIMINATE
HAZARD OF ELECTRIC SHOCK.
CAUTION
This circuit diagram is original one,
therefore there may be slight difference
from yours.
This circuit diagram is original one,
therefore there may be slight difference
from yours.
IMPOTANT SAFETY NOTE:
PARTS MARKED WITH «
» (
) ARE
IMPORTANT FOR MAINTAINING THE SAFETY
OF THE SET. BE SURE TO REPLACE THESE
PARTS WITH SPECIFIED ONES FOR MAINTAIN-
ING THE SAFETY AND PERFORMANCE OF THE
SET.
OF THE SET. BE SURE TO REPLACE THESE
PARTS WITH SPECIFIED ONES FOR MAINTAIN-
ING THE SAFETY AND PERFORMANCE OF THE
SET.
!
SAFETY NOTE:
1. DISCONNECT THE AC PLUG FROM THE AC
OUTLET BEFORE REPLACING PARTS.
1. DISCONNECT THE AC PLUG FROM THE AC
OUTLET BEFORE REPLACING PARTS.
2. SEMICONDUCTOR HEAT SINKS SHOULD BE
REGARDED AS POTENTIAL SHOCK HAZARDS
WHEN THE CHASSIS IS OPERATING.
REGARDED AS POTENTIAL SHOCK HAZARDS
WHEN THE CHASSIS IS OPERATING.
WAVEFORMS:
27
21HS-50H
28
21HS-50H
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SCHEMATIC DIAGRAM OF MOTHER UNIT (F7340N4, 01 Version)
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