Kenwood DMC-G7R Service Manual page 17

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.
REF. NO DESCRIPTION POSITION
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
FRONT
VIEW
(G) (D) (S)
1 2 3
2SA1314 C
2SA2982 C
TOP VIEW
SB0209CP
DA221
1SS373
Figure 26 TYPES OF TRANSISTORS AND DIODES
(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.
B
(D)
(3)
C
TOP
(S)
VIEW
(2)
E
(G)
(1)
2SA1745
DTA114 TE
DTC144 TE 2SC4213 B
DTC323 TK 2SK2909
2SK2911
DTC144B EE
TOP VIEW
SB00703Q
WAVEFORM
PLAY Condition
CH1=500mV 500s/d
DC P 10
*
1 TP145
(EFM)
1.8V P-P
PLAY Codition (MO DISC)
CH1=2V CH2=500mV 20µs/d
DC P 10 DC P 10
* *
2 CK104
(HPFO)
3 CK102
(WBO)
STAND-BY PLAY
CH1=2V CH2=500mV CH3=5V CH4=2V 100ms/d
DC P 10 DC P 10 DC P 10 DC P 10
* * * *
4 TP143
(FEOUT)
5 TP107
(F+)
6 TP206
(SENSE)
7 TP207
(FOK)
FOCUS START FOCUS ON
STAND-BY MODE PLAY MODE
PIT
CH1=1V CH2=2V CH3=2V CH4=2V 1s/div
DC 10:1 DC 10:1 DC 10:1 DC 10:1 (16/div)
ENV
4 TP143
(FEOUT)
8 TP144
(TEOUT)
9 TP610
(SL+)
10 TP611
(SL-)
Bandwidth Smooth
FULL 20MHz OFF ON
CH2=2V CH3=2V CH4=2V 1s/div
DC 10:1 DC 10:1 DC 10:1 (1s/div)
ENV
7 TP144
(TEOUT)
9 TP611
(SL+)
10 TP610
(SL-)
CH4
CH Position To
Position
-3div -1div 0div +1div +3div -2.7 div 1
CH1=2V CH2=2V CH3=2V CH4=2V 1s/div
DC 10:1 DC 10:1 DC 10:1 DC 10:1 (1s/div)
ENV
4 TP143
(FEOUT)
TP144
7
(TEOUT)
11 TP605
(SPDRR)
12 TP604
(VS)
CH4
Position
1
CH Position To -2.7 div
CH3=2V CH4=2V 50ms/div
DC 10:1 DC 10:1 (50ms/div)
ENV
11 TP605
(SPDRR)
12 TP604
(VS)
CH3
Position
-2.7 div 1
CH Position To
CH1=2V CH2=2V CH3=1V 2ms/div
DC 10:1 DC 10:1 DC 10:1 (2ms/div)
ENV
1
7
13 CK105
(TOTAL)
CH2
Position
CH Position To -2.7 div 1
Groove
CH1=2V CH2=2V CH3=1V 2ms/div
DC 10:1 DC 10:1 DC 10:1 (2ms/div)
ENV
1 TP605
(EFM)
7 TP144
(TEOUT)
13 CK105
(TOTAL)
CH2
Position
-2.7 div 1
CH Position To
CH1=2V CH2=2V CH3=1V CH4=1V 500µs/div
DC 10:1 DC 10:1 DC 10:1 DC 10:1 (500µs/div)
ENV
1 TP145
(EFM)
7 TP144
(TEOUT)
14 TP104
(T+)
15 TP106
(T-)
CH2
Position
1
CH Position To -2.7 div
AD/DA Converter Input
CH1=2V CH2=2V CH3=2V CH4=2V 5µs/div
DC 10:1 DC 10:1 DC 10:1 DC 10:1 (5µs/div)
ENV
16 SDTI
17 SCLK
(1.4M)
18 LRCK
19 MCLK
CH2
Position
-2.7 div 1
CH Position To