Kenwood DMC-G7R, Service Manual

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17
TROUBLE SHOOTING
DMC-G7R
TP145
(EFM)
1.8V P-P
1
CH1=500mV
*
DC P 10
PLAY Condition
500s/d
TP143
(FEOUT)
STAND-BY MODE
FOCUS START FOCUS ON
4
TP107
(F+) 5
TP206
(SENSE) 6
TP207
(FOK) 7
CH1=2V
*
DC P 10
*
DC P 10
*
DC P 10
CH4=2V
*
DC P 10
CH3=5V 100ms/d CH2=500mV
PLAY STAND-BY
PLAY MODE
CK104
(HPFO) 2
CK102
(WBO) 3
CH1=2V
*
DC P 10
*
DC P 10
20
µ
s/d CH2=500mV
PLAY Codition (MO DISC)
TP143
(FEOUT) 4
TP144
(TEOUT) 8
TP610
(SL+) 9
TP611
(SL-) 10
CH1=1V
DC 10:1
CH2=2V
DC 10:1
CH4=2V
DC 10:1
CH3=2V
DC 10:1
1s/div
PIT
(16/div)
ENV
OFF FULL ON 20MHz
Bandwidth Smooth
TP144
(TEOUT) 7
TP611
(SL+) 9
TP610
(SL-) 10
CH2=2V
DC 10:1
CH4=2V
DC 10:1
CH3=2V
DC 10:1
1s/div
(1s/div)
ENV
CH Position To
-3div +3div -1div +1div 0div
CH4
Position
-2.7 div
1
TP144
(TEOUT)
7
TP143
(FEOUT) 4
TP605
(SPDRR) 11
TP604
(VS) 12
CH2=2V
DC 10:1
CH1=2V
DC 10:1
CH4=2V
DC 10:1
CH3=2V
DC 10:1
1s/div
(1s/div)
ENV
CH4
Position
-2.7 div 1 CH Position To
TP605
(SPDRR) 11
TP604
(VS) 12
CH4=2V
DC 10:1
CH3=2V
DC 10:1
50ms/div
(50ms/div)
ENV
CH3
Position
-2.7 div
1
CH Position To
7
1
CK105
(TOTAL) 13
CH3=1V
DC 10:1
CH1=2V
DC 10:1
CH2=2V
DC 10:1
2ms/div
(2ms/div)
ENV
CH2
Position
-2.7 div 1 CH Position To
TP144
(TEOUT) 7
TP605
(EFM) 1
CK105
(TOTAL) 13
CH3=1V
DC 10:1
CH1=2V
DC 10:1
CH2=2V
DC 10:1
2ms/div
(2ms/div)
ENV
Groove
CH2
Position
-2.7 div
1
CH Position To
TP144
(TEOUT) 7
TP104
(T+) 14
TP145
(EFM) 1
TP106
(T-) 15
CH3=1V
DC 10:1
CH4=1V
DC 10:1
CH1=2V
DC 10:1
CH2=2V
DC 10:1
500
µ
s/div
(500
µ
s/div)
ENV
CH2
Position
-2.7 div 1
CH Position To
AD/DA Converter Input
SCLK
(1.4M) 17
LRCK 18
SDTI 16
MCLK 19
CH3=2V
DC 10:1
CH4=2V
DC 10:1
CH1=2V
DC 10:1
CH2=2V
DC 10:1
5
µ
s/div
(5
µ
s/div)
ENV
CH Position To
CH2
Position
-2.7 div
1
NOTES ON SCHEMATIC DIAGRAM
• Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to electro-
lytic capacitor, the expression “capacitance/withstand volt-
age” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis with no signal given.
• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
POSITION REF. NO DESCRIPTION
SW401 DISC COVER OPEN/CLOSE OFF—ON
DELECTION
SW402 HOLD OFF—ON
SW901 LEAD IN OFF—ON
SW902,904 DISC MEDIA OFF—ON
SW903 DISC PROGRAM OFF—ON
Figure 26 TYPES OF TRANSISTORS AND DIODES
2SA1314 C
2SA2982 C
FRONT
VIEW
(G)
1
(D)
2
(S)
3
SB0209CP
DA221
1SS373 SB00703Q
TOP VIEW
TOP VIEW
B
(D)
(3)
E
(G)
(1)
C
(S)
(2)
TOP
VIEW
DTA114 TE
DTC144 TE
DTC323 TK
DTC144B EE 2SA1745
2SC4213 B
2SK2909
2SK2911
WAVEFORM
D
DMC-G7R(k)
COVER(
98.4.24
2:20
PM
y[W
23