Read Sharp PZ-50HV2E (serv.man14) Service Manual online
PZ-50HV2, PZ-50HV2E
PZ-50HV2U
PZ-50HV2U
80
4.4V
1.6V
0V
7.3V
7.3V
0V
7.3V
7.3V
5.8V
5.9V
CH1
CH2
Oscilloscope
Measurement
Point
AUDIO AMP ASSY
SP TERMINAL ASSY
SP TERMINAL
ASSY
Speaker
etc.
AUDIO AMP
ASSY
1
CN5001 - pin 4 (L)
↔
GND
V: 0.1V/div. H: 0.2msec/div.
2
IC5202 - pin 14 (LOUT)
↔
GND
V: 0.1V/div. H: 0.2msec/div.
4
IC5002 - pin 1 (IN1)
↔
GND
V: 0.1V/div. H: 0.2msec/div.
5
J5003 - pin 5 (L+)
↔
GND
V: 1V/div. H: 0.2msec/div.
3
IC5201 - pin 19 (FOCUSOUTL)
↔
GND
V: 0.1V/div. H: 0.2msec/div.
6
J5003 - pin 6 (L–)
↔
GND
V: 1V/div. H: 0.2msec/div.
7
J5003 - pin 5 (L+)
↔
pin 6 (L–)
V: 2V/div. H: 0.2msec/div.
8
CN5301 - pin 1 (L+)
↔
GND
V: 1V/div. H: 0.2msec/div.
7
1
10
9
CN5301 - pin 2 (L–)
↔
GND
V: 1V/div. H: 0.2msec/div.
10
CN5301 - pin 1 (L+)
↔
pin 2 (L–)
V: 2V/div. H: 0.2msec/div.
AUDIO SECTION
Video Input Signal : FULL FIELD COLOR-BAR
Audio Input Signal : 1kHz Sine Carve 0.2Vrms
Volume
Audio Input Signal : 1kHz Sine Carve 0.2Vrms
Volume
: 60 (MAX)
AV Selection
: STANDARD
SRS
: OFF
FOCUS
: OFF
Measurement condition
GND and the speaker output (- side) becomes
a short state on the oscilloscope.
a short state on the oscilloscope.
Wrong connection example
Caution in the measurement
Audio Power Amp. (IC5002: LA4628) on the AUDIO AMP Assy is BTL system, and,
as for the power amplifier and the speaker output,
as for the power amplifier and the speaker output,
±
poles becomes hot for the
ground. Therefore be careful not to connect the measuring instrument as the following
figures. (Power amplifier may be damaged.)
figures. (Power amplifier may be damaged.)
Click on the first or last page to see other PZ-50HV2E (serv.man14) service manuals if exist.