Panasonic Omnivision PV-4651, Service Manual

Page: 174 / 205

TIMING CHART
ACTION
POSITION
TIME ms*
TIMING CHART 1
LOADING
FWD(H)
(PIN 10)
LOADING
REV(H)
(PIN 9)
CAPSTAN
ON(H)
CYLINDER
ON(L)
VIDEO EE(H)
(PIN 11)
AUDIO
MUTE(H)
(PIN 5)
PB(L)
(PIN 6)
CAPSTAN
R(H)/S(M)/F(L)
(PIN 42)
CASSETTE IN/PLAY (S-TAB OFF)
2S 8S 2.6S
1 2 3 4 5/6 7 8 9
1-1
1-3
1-4
1-3
H
L
M M
L L
NOTE: 1) PIN NO. WITH BRACKET INDICATES PIN NO. OF IC6001.
2) *:IT SHOWS MAXIMUM TIME.
MODE BY MODE OPERATION
1. CASSETTE IN /PLAY(WITHOUT SAFETY TAB)
1-1. The Loading Motor starts rotation in a forward direction.
1-2. The Cylinder starts rotation for quick play.
1-3. The Loading Motor stops.
1-4. The Idler Gear swings over to Takeup Reel.
1-5. Supply Reel rotates until the cassette reaches the down position.
If the mechanism does not reach position 3 from position 1 within 2.6
seconds, the mechanism moves to position 1 to eject the tape. If the
mechanism does not reach position 4 from position 3 within 3 seconds,
the mechanism moves to position 1 to eject the tape. If the mechanism
does not reach position 7 from position 4 within 8 seconds, the unit shuts
off.
100
BASIC OPERATION WITH MODE SELECT SWITCH
Degree
SW1
SW2
SW3
SW4
EJECT STOP REV STBY PLAY FF/REW
1 2 3 4 5 6 7 8 9 A
18.0 54.2 107.2 159.8 167.1 181.5 188.8 209.2 233
POS#
ACTION
POSITION
TIME ms*
TIMING CHART 2
CASSETTE IN/STOP (S-TAB ON)
2.6S
1 2 3
2-2
2-3
2-4
H
L
M
350
LOADING
FWD(H)
(PIN 10)
LOADING
REV(H)
(PIN 9)
CAPSTAN
R(H)/S(M)/F(L)
(PIN 42)
3S
NOTE: 1) PIN NO. WITH BRACKET INDICATES PIN NO. OF IC6001.
2) *:IT SHOWS MAXIMUM TIME.
MODE BY MODE OPERATION
2. CASSETTE IN /STOP(WITH SAFETY TAB)
2-1. The Loading Motor starts rotation in a forward direction.
2-2. The Idler Gear swings over to Takeup Reel.
2-3. Takeup tape slack.
2-4. Supply Reel rotates until the cassette reaches the down position.
CAPSTAN
ON(H)
CYLINDER
ON(L)
PB(L)
(PIN 6)
200
5S
H
1-3
ACTION
POSITION
TIME ms*
TIMING CHART 3
LOADING
FWD(H)
(PIN 10)
LOADING
REV(H)
(PIN 9)
VIDEO EE(H)
(PIN 11)
AUDIO
MUTE(H)
(PIN 5)
CAPSTAN
ON(H)
CYLINDER
ON(L)
CAPSTAN
R(H)/S(M)/F(L)
(PIN 42)
PLAY/REC
2S
2.6S
2S
7 8 9
3-2
3-3
3-1
3-4
L
M
L
NOTE: 1) PIN NO. WITH BRACKET INDICATES PIN NO. OF IC6001.
2) *:IT SHOWS MAXIMUM TIME.
MODE BY MODE OPERATION
3. PLAY/REC
3-1. The Cylinder Motor starts rotation for quick play.
3-2. The Loading Motor starts rotation in a forward direction.
3-3. The Capstan Motor rotates in a forward direction to the Idler Gear
swings over to Takeup Reel.
3-4. When the Mode Switch reaches position 9, the Loading Rev(H) signal
goes HIGH to apply a brake to the Loading Motor.
Then the Loading Motor stops quickly.
100
VIDEO DELAY
REC(H)
(PIN 37)
PLAY
REC
PLAY
REC
PLAY
REC
PLAY
REC
PB(L)
(PIN 6)
1-5
350 3S
4 5/6 7
200
8 9 8 7
5S 200 2.6S 100 10
M
2-1
L
2-3