SNES

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Chips & ICs

SHVC-CPU-01 (1990)


SHVC-SOUND


SNS-CPU-GPM-01 (1992)


SNS-CPU-GPM-02 (1993)


SNS-CPU-RGB-01 (1994)


SNS-CPU-RGB-02 (1995)


SNS-CPU-APU-01 (1995)


SNS-CPU-1CHIP-02 (1995)


SNN-CPU-01 (1997) (Mini)


Schematics

Capacitor Lists

NTSC Capacitor Lists

SHVC-CPU-01

Purchase these parts as a kit (leaded)

Purchase these parts as a kit (surface mount)

SHVC-CPU-01
C50	47uf	10v
C51	47uf	10v
C57	100uf	6v
C58	100uf	6v
C59	100uf	6v
C60	100uf	6v
C61	10uf	16v
C62	2.2uf	50v
C63	33uf	25v
C64	33uf	25v
C65	10uf	16v
C66	10uf	16v
C67	1000uf	25v


SNS-CPU-GPM-01, SNS-CPU-GPM-02

Purchase these parts as a kit (leaded)

Purchase these parts as a kit (surface mount)

SNS-CPU-GPM-01
C57	220uf	6.3v	
C59	220uf	6.3v	
C61	10uf	16v	
C62	2.2uf	50v	
C63	33uf	25v	
C64	33uf	25v	
C65	10uf	16v	
C66	10uf	16v	
C67	1000uf	25v	(Not present on North American units)
C73	47uf	16v	


SNS-CPU-RGB-01, SNS-CPU-RGB-02, SNS-CPU-APU-01

Purchase these parts as a kit (leaded)

Purchase these parts as a kit (surface mount)

SNS-CPU-RGB-02
C9	2.2uf	50v
C12	10uf	16v
C13	10uf	16v
C14	33uf	25v
C15	47uf	16v
C16	33uf	25v
C17	33uf	25v
C18	220uf	6.3v
C19	220uf	6.3v
C58	1000uf	25v	(Not present on North American units)


SNS-CPU-1CHIP-01, SNS-CPU-1CHIP-02, SNS-CPU-1CHIP-03

Purchase these parts as a kit (leaded)

Purchase these parts as a kit (surface mount)

SNS-CPU-GPM-01
		
C9	2.2uf	50v
C12	10uf	16v
C13	10uf	16v
C14	33uf	25v
C15	47uf	16v
C16	33uf	25v
C17	33uf	25v
C18	220uf	6.3v
C19	220uf	6.3v
C58	1000uf	25v	(Not present on North American units)


SNN-CPU-01 (Smaller, redesigned SNES)

Purchase these parts as a kit

SNN-CPU-01
		
C9	2.2uf	50v
C14	33uf	25v
C15	47uf	16v
C16	33uf	25v (some will have 50v but these caps are
C17	33uf	25v  not required to be anywhere near this highly rated)
C52	1000uf	25v (Not present on North American units)
C58	10uf	16v
C59	10uf	16v
C60	220uf	6.3v


PAL Capacitor Lists

SNSP-CPU-01

Purchase these parts as a kit (Leaded replacements)

Purchase these parts as a kit (Surface mount replacements)

SNSP-CPU-01
		
C59	10uF	25v	This cap should be updated to bipolar!
C60	10uF	50v	
C61	10uF	50v	
C62	2.2uF	50v	
C63	33uF	25v	
C64	33uF	25v	
C65	10uF	50v	
C66	10uF	50v	
C67	2200uF	25V	
C73	47uF	16v	


SNSP-CPU-02

Purchase these parts as a kit (Leaded replacements)

Purchase these parts as a kit (Surface mount replacements)

Almost identical to the SNSP-CPU-01, except C59 has been changed to bipolar.

SNSP-CPU-01
		
C59	10uF	25v	BP
C60	10uF	50v	
C61	10uF	50v	
C62	2.2uF	50v	
C63	33uF	25v	
C64	33uF	25v	
C65	10uF	50v	
C66	10uF	50v	
C67	2200uF	25V	
C73	47uF	16v	


SNSP-CPU-1CHIP-01 and SNSP-CPU-1CHIP-02

Purchase these parts as a kit

C9	2.2uF	50v
C12	10uF	16v
C13	10uF	16v
C14	33uF	25v
C15	47uF	16v
C16	33uF	25v
C17	33uF	25v
C18	220uF	6.3v
C19	220uF	6.3v
C59	10uF	25v	BP
C71	10uF	50v
C72	2200uF	25V


Control Deck Diagnostic Table

Transcribed from Nintendo service literature. Appears to be specific to SHVC-CPU boards, but these tips likely have application to other revisions too.

Before attempting any repairs to the control deck, disassemble the unit and thoroughly inspect the PCB. Look for damaged/missing components or traces, solder defects, and dirt or corrosion. Do not attempt to clean 62 pin connectors; they should be replaced.

Malfunction
Probable Cause (In order of priority)
Solid color screen
Defective 62 pin connector
Defective Sound Module
Poor solder
Defective U1 (CPU)
Defective U3 (PPU2)
Defective U6 (WRAM)
Defective U2 (PPU1)
Defective U7 (RGB encoder)
Defective X1 (21 MHz oscillator)
Defective U8 (CIC)
Scrambled video images
Defective 62 pin connector
Poor solder
Defective U3 (PPU2)
Defective U1 (CPU)
Defective U2 (PPU1)
Defective U4 or U5 (256K S-RAM)
Distorted or no sound
Defective Sound Module
Defective connector P5
Defective U1 (CPU)
Defective U10 (Amp)
Defective Q18
No Reset
Defective US (CIC)
Defective X2 (4MHz oscillator)
Defective U9 (74HCU04)
Poor or no color
Defective TC1 - Master clock frequency should be adjusted to = 21.47727 Mhz
Defective U3 (PPU2)
Defective U7 (RGB Encoder)
Defective X1 (21 MHz oscillator)
No power
Defective F1 (1.5A fuse)
Defective D1
Defective T1 (Line Filter)
Defective U12 (Regulator 7805}
Defective VA1 (Surge Absorber)
Defective Q18
Defective P3 (Power Switch}
Snowy screen
Defective RF Modulator
Intermittent or no controller operation
Defective Front Unit PCB assembly
Defective FCC Harness (flat cable)
Defective connector P2
Defective Ul (CPU)
Frozen screen/Erratic program operation
Defective 62 pin connector
Poor solder
Defective I1 (CPU)
Defective U3 (PPU2)
Defective U2 (PPU1)
Ejector will not properly eject game paks
Control Deck utilizes an early version ejector (Replace upon customer complaint ONLY)
Defective ejector

Two television incompatibilities have been identified with early production Super NES Control Decks. If the customer complains of a television screen "bounce", or a loss of color, a PPU2 replacement or a PCB warranty exchange may be required (refer to Service Bulletin #91252).


Vertical Line

On certain combinations of SNES models and TVs/Monitors, a bright vertical line may be visible in the middle of the screen.

The cause seems to be a voltage drop caused by insufficient bypass capacitors.

All of our kits include a 470uF cap to place across the voltage regulator to help diminish the appearance of this line.

https://www.retrorgb.com/snesverticalline.html

S-Video Output for SNES 2 / Junior (SNN-CPU)

Y/C video exists at the RGB encoder on the SNES 2 units, but Nintendo decided not to connect it to the Multi AV port. Luckily it's easy to add a few components and restore S-video!

Purchase these parts as a kit

  • Parts:
    • 2x 75Ω resistors
    • 220µf @ 6.3v Capacitor
    • 0.1µf Ceramic Capacitor


  • Luma:
  1. Positive side of 220µf connects to Luma (pin 17) on RGB chip
  2. Negative side to 75Ω resistor
  3. Other side of resistor to pin 7 at MultiAV


  • Chroma:
  1. One side of 0.1µf capacitor to Chroma (pin 12) on RGB chip
  2. Other side of 0.1µf capacitor to second 75Ω resistor
  3. Other side of resistor to pin 8 at MultiAV


1CHIP-03 CSYNC Restore

Nintendo removed CSYNC from the MultiAV connector on revision 1CHIP-03. CSYNC can be restored to original specs by addeding the following components:

Purchase these parts as a kit

Restored CSYNC Circuit

(Colors are to quickly reference the parts in our kit)

  • Q1: C2412
  • R9: 1.8kΩ (Blue)
  • R10: 3.3kΩ (Green)
  • R11: 300Ω (Yellow)
  • R12: 100Ω (Red)
  • C46: 330pF (near MultiAV port)