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Check peripheral circuit of X701.

Is there 14.318MHz oscillation at 
pins(37) and (38) of IC701?

Is there drum FG signal at pin
(65) of IC701 present?

Is the V-SYNC signal(reference) 
at pin(50) of IC701?

Check peripheral circuit of pin
(50) of IC701, C716, C715 and 
R708.

Check drum FG signal line.

Is the head switching pulse at pin
(23) of IC701 present?

See FLOW CHART NO.15 
(HEAD SWITCHING PULSE 
TROUBLESHOOTING.)

Is the drum APC output at pin(34) 
of IC701 and drum AFC output at 
pin(32) of IC701 present?

Replace IC701.

Is the drum control voltage 
applied to pin(12) of P701?

Is pin(30) of IC701 in high 
impedance?

Check line between pins(34) and 
(32) of IC701 and pin(12) of P701.

Does the IC on mechanism operate 
normally?

Replace IC701.

Replace drum motor.

1

2

Check peripheral 
circuit of pin(50) 
of IC701, C716, 
C715 and R708.

Is there 14.318MHz 
oscillation at pins
(37) and (38) of 
IC701?

Check peripheral 
circuit of X701.

Dose pin(29) of 
IC701 operate 
normally?

Check "

1

"

Check "

2

"

Check capstan 
motor unit and/or 
replace.

Is there capstan 
AFC and APC 
at pins(31) and 
(33) of IC701?

Replace IC701.

Replace A/C 
head.

Is there capstan 
AFC signal at pin 
(31) of IC701?

Is there capstan 
APC signal at pin 
(33) of IC701?

Replace IC701.

Does PB CTL 
signal appear at 
pin (76) of IC701?

Replace IC701.

Is there REC CTL 
signal output at 
pins(75) and (74) 
of IC701?

Does PB CTL 
signal appear at 
pin(76) of IC701?

Does A/C head 
operate 
normally?

Adjust the height 
of the A/C head.

Does the capstan 
FG signal appear
at pin (67) of IC-
701?

Check the capstan 
FG signal line bet-
ween pin(1) of P701 
and pin(67) of IC701.

Check peripheral 
circuit of P701.

Is the V-SYNC 
signal(reference) at
pin(50) of IC701?

Are REC and/or PB 
mode inoperative?

Is there picture signal inputted 
in the pin (31) of IC201?

Check line between rear video input terminal and pin (31) of IC201. 

Is the supply voltage of 5V
(Y-Vcc) fed to pin(12) of 
IC201?

Check PC 5V line.

Is there a picture signal 
outputted in the emitter of
Q201?

Check the line between pin 
(52) of IC201 and Q201

Is there Y/C serial data and 
Y/C clock signal applied to 
pins(63) and (62) of IC201?

Check line between pins(63), 
(62) of IC201 and pins(84),
(85) of IC701.

Replace IC201.

Is there a picture signal 
inputted in the pin(49) of
IC701?

Check peripheral circuit of 
Q251. 

Is there a picture signal 
outputted in the pin(47) of
IC701?

Is there a picture signal 
outputted in the pin(52) of 
IC201?

Is there a picture signal 
outputted in the emitter of
Q251?

Check the line between pin 
(52) of IC201 and  pin (49)
of IC701

Is the supply voltage of 5V 
(OSD Vcc) fed to pin (51)
of IC701?

Check PC 5V line.

Is there a picture signal 
outputted at pin(25) ofIC2501?

Check peripheral circuit of 
IC2501.

Check the line between IC2501
peripheral and output terminal
periphery.

Is there luminance signal (approx.0.5Vp-p) 
inputting at pin (19) of IC201?

Is voltage 5V applied to the CCD section 
power terminal at pin(36) of IC201?

Check whether the pin(73) and (75) of IC201  
oscillate 4.43MHz.

Is there audio signal outputted at  
pin(11) of IC201?

Check line between pin(60)  and pin (46) of
 IC201. (C512)

Check line between pin(58) and (35)
 of IC201 .

Is there chroma signal inputted at  
pin(58) of IC201?

SP mode :  Is there record FM signal (approx. 20mVp-p) output at pins (88), (89)(SP1)) and 
pins (86), (87) ((SP2)) of IC201?: 
 
LP mode :  Is there record FM signal (approx. 20mVp-p) output at pins (93), (94)(LP1)) and 
pins (92), (91) ((LP2)) of IC201?: 

Is CCD control voltage approx 0V applied
normally to the pin (37) from pin (57) of 
IC201? Is the clock signal (approx. 
8.86MHz/0.5Vp-p) for the CCD applied 
normally to the pin(44)from (69) of IC201?

Check line between pins(24), (23) of IC201 
(C210).

Check peripherial circuit of pins(13) and (14) 
of IC201. (R201, R202, C203)

Is there luminance signal (approx. 0.5Vp-p), 
input and output at pins (13) and (14)
of IC201, respectively?

Check parts around of X502.

Is there luminance signal (approx.0.3Vp-p) 
inputting at pin (42) of IC201?

Is there luminance signal (approx.0.5Vp-p) 
inputting at pin (26) of IC201?

Check line between pins (18)  and (19) 
of IC201.

Check line between pins (21) and (42) 
of IC201. (C208)

Check line between pins (39) and (26) 
of IC201. (C212)

Is there luminance signal (approx.0.5Vp-p) 
outputting at pin (39) of IC201?

Is there luminance signal (approx.0.5Vp-p) 
inputting at pin (23) of IC201?

Is voltage of 5V applied to the chroma  
section power terminal at pin(61) of IC201?

Check peripheral circuit pin(61) of IC201 and 
PC 5V line.

Is there chroma signal inputted at pin(35) of 
IC201?

SP mode :  Is there chroma ingredient included signal (approx. 20mVp-p) output at pins (88), (89)
(SP1)) and pins (86), (87) ((SP2)) of IC201?: 
  
LP mode :  Is there chroma ingredient included signal (approx. 20mVp-p) output at pins (93), (94)
(EP1)) and pins (92), (91)((EP2)) of IC201?: 

Check  or replace the cylinder.

Is the supply voltage of 5V(PRE/REC 
Vcc) fed to pin (90) of IC201?

Replace the IC201.