VC-M315HM (serv.man7). Electrical troubleshooting guide - Sharp VCR Service Manual (repair manual). Page 8

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.