Service manual

44
VL-WD250U
VL-WD450U
12-3. FLOW IN PB MODE (VIDEO)
WAVEFORM DIAGRAM
(DURING COLOR BAR PLAYBACK)
12-4. FLOW IN REC MODE (AUDIO)
WAVEFORM DIAGRAM (1.6 kHz SINE WAVE)
CDY
CDC
ZYP
IC452
REC/PB ENGINE
IC3401
EQ/PLL
B TO B
IC202
CAM ENGINE
ZCP
39
227
40 47
50 57
163 164 169 173161
180 183 187 190
68
72
75
77
84
85
87
92
SC3301
HEAD AMP
44
44
229 236
PB_DATA
PB_DATA
ADIN
IC3403
IC3404
PB-CK
4
2
3
10
21
12
13
32
17
A/D
IC4401 to VIO ENGINE
same as in EE system
IC3401 39pin PBDATA Input
IC3401 44pin Input
IC3401 1pin Output
IC3401 32pin Output
CH1=500mV
DC P*10
5ms/d
1
CH1=500mV
DC P*10
5ms/d
1
CH1=500mV
DC P*10
5ms/d
1
CH1=1V
DC P*10
5ms/d
1
IC1602 Input
12
CH1=1V
DC P*10
10µs/d
1
MIC L
MIC R
IC601
IC1602
AUDIO I/O
IC452
REC/PB ENGINE
16Bit ADC/DAC
AUD-L ADIN
AIDAT
AUD-R ADIN
REC GATE
REC DATA
30
27
20
21
TELE-MIC
MIC AMP
INT-MIC-L
INT-MIC-R
46
3
47 2
17
32
3
6
12
13
243 244
IC6601
same as in
REC s
y
stem